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  • Original article
  • Open Access

Transformation pathways of phasing out coal-fired power plants in Germany

Energy, Sustainability and Society20188:25

https://doi.org/10.1186/s13705-018-0166-z

  • Received: 19 January 2018
  • Accepted: 20 July 2018
  • Published:

Abstract

Background

While there are plenty of studies investigating the market penetration of new technologies, phase-out processes of a predominant technology are rarely analyzed. The present study explores the case of a declining technology, employing the example of coal-fired power plants in Germany. These plants were promoted by governmental decision-makers as well as by the industry for a long time, but meanwhile, the phase-out or at least a cutback of coal-fired power plants is––not only in Germany––considered to be a key strategy for the transformation towards a sustainable society.

Methods

We investigate potential pathways of the future development of the coal-fired power plant sector in an extended multi-level perspective (MLP) framework that integrates economic, social, political, and technical aspects.

Results

Taking into account the fact that coal is losing its support from several important stakeholders (e.g., governmental decision-makers, utilities) due to, e.g., changes in the prioritization of political goals, changes in the economic framework, in actor constellations, and in public attitudes, coal-fired power plants tend to be pushed into niches or to disappear completely.

Conclusions

A reasonable management of the niche technology “coal-fired power plants” could include a protection of space for ensuring a smooth removal of the links between the regime and the technology with respect to, e.g., social and environmental aspects. The phase-out pathways for the coal-fired power plants elaborated on in this paper help to better inform policy-makers to design transformation processes not only for coal-fired power but also for other declining technologies.

Keywords

  • Multi-level perspective
  • Coal-fired power plants
  • Phase-out
  • Transformation pathways

Background

The market penetration of a new technology strongly depends on its economic competitiveness. Changes in technological, political, economic, and social frameworks may bring about technological changeovers, in particular when there is limited adaptability of prevailing technologies to these changes. In such changeover processes, firms and other agents are looking for those technologies that fit the existing selection environment best and, with it, windows of opportunities for one technology might correspond to windows of threats for others (see, e.g., [1, 2]). Lock-in and path dependence shape the size and design of the windows (see, e.g., [3, 4]). Most studies on respective transformation processes focus on the evolution of new technologies’ market penetration and omit future perspectives for the initially predominant technologies (see, e.g., [5]).

The multi-level perspective approach (MLP) (see, e.g., [57]) is a concept frequently employed to explore transformation processes such as the replacement of horse-drawn carriages by automobiles [8] and the replacement of sailing ships by steamships [9]. Also technologies that could become a key technology in the future were investigated in this way; examples are hydrogen and battery vehicles (see, e.g., [10, 11]). Verbong and Geels [12], Verbong et al. [13], and Rosenbloom and Meadowcroft [14] analyze decarbonization pathways focusing not only on one specific technology but on a complex energy system. Newly emerging technologies and predominant technologies tend to co-evolve in such a way that the initially predominant technologies lose market power and/or political support and phase-out, while newly emerging technologies develop contrarily to this [15]. In contrast to approaches focusing on techno-economic systems, path dependencies and path creation, and transition management (see, e.g., [6, 16]) in the MLP approach evolutionary aspects (e.g., disruptive changes in the general conditions or changes in attitudes and behavior) are taken into consideration. Besides the mapping of dynamics, the MLP approach shows similarities to innovation system approaches (i.e., with respect to actor and framework constellations for innovation processes). One of the key features of MLP is the consideration of a broad range of factors, which trigger the development of novelties and their dissemination. Hence, MLP differs significantly from techno-economic approaches, which focus on economic aspects and technological constraints.

In our study, we focus on the development of coal-fired power plants in Germany. Since the development in the power plant sector is strongly influenced by manifold factors (e.g., attitudes of investors and public, decisions of policy-makers, disruptive changes resulting from developments on global or European level), we select MLP as the most appropriate approach.

The original perspective of the MLP approach is not concerned with “phasing out” processes. Instead, the focus is on innovations and their interference with the regime. In contrast, our study explores how a presently predominant technology becomes fainter and which transition pathways are possible. To put it differently, we are concerned with the question how this technology will “phase-out.” A phase-out in our context means a process, which is initiated by many factors while a political program for it is not mandatory. We focus on the saturation and decline stage of coal-fired power plants and consider economic, social, political, and technical aspects. The objective of this case study is to improve the understanding of different transition pathways of a predominant but faltering technology. The results of this study will help to inform policy-making in this context. Coal-fired power plants are a very prominent example––not only in Germany (see, e.g., [17])––because their phase-out is considered to be a key strategy for the decarbonization of economies and the creation of sustainable societies [18]. A prerequisite for meeting the Paris Agreement goals of keeping a global temperature rise this century at least well below 2 °C above pre-industrial levels is seen by several studies in a rapid decline in the use of coal-fired power plants and a complete phase-out around mid-century globally (see [19]). Recently, the phase-out process got a new impetus by the establishment of the Powering Past Coal Alliance. Several countries, among them industrialized countries (e.g., the UK) as well as developing countries (e.g., Mexico), launched this alliance on 16th of November 2017, which strives for a phase-out of coal-fired power plants. The participating countries “commit to achieve a phase-out in an environmental, social, and economically inclusive way, including appropriate support for workers and communities” in their declaration [20].1

Because of the importance of coal-fired power plants for lignite mining regions as well as for their reliability with respect to assured power capacity, the phase-out of coal-fired power plants has to be well planned (see, e.g., [21]). Phasing out coal-fired power plants will not only result in less CO2 emissions but will also affect the use of fresh water,2 the structure of the electricity grid, tax revenues on the local level, public research and development (R&D) infrastructure (see, e.g., [22]) as well as international trade. On the other side, coal-fired power are increasingly faced by problems of acceptance which trigger the pressure on phasing out processes [23].

Since several coal-fired power plants are used as combined heat and power (CHP) stations, the supply of district heat will be affected by the phase-out of coal-fired power plants, too [24]. Thus, in order to avoid disruptions in the heat supply, pathways for the replacement of coal-fired CHP have to be developed.

On the local level, the shutting down of coal-fired power plants could have severe impacts on employment. Beside effects resulting from releasing staff working in power plants and mines, there will also be indirect effects resulting from a lower demand for goods and services needed for running the power plants as well as income effects [25]. For instance, local communities face lower incomes as a decline in profits of companies impairs tax revenues. Yet, in some strongly affected local communities (e.g., those located close to brown-coal pits) in particular, power from coal-fired plants is becoming less and less accepted.

The phase-out of coal-fired power plants is an even greater challenge due to the increasing domination of the electricity market by wind and PV power plants. Since wind conditions and solar radiation fluctuate over time, the applicability of wind and PV power stations for covering electricity demand at any time is limited whereas due to their high technological availability and flexibility, coal-fired power plants fulfill the requirement of “covering electricity demand at any point in time” without significant problems.

Possible futures for coal-fired power plants in Germany were identified and analyzed in several studies. Usually, the studies focus on the impacts of exogenously given reduction targets for greenhouse gas emissions or phase-out paths for coal-fired power plants (see, e.g., [2628]). Typically, technology-based bottom-up models have been applied. Hence, scenarios reflect how the energy system will evolve from a technological point of view, aspects of lacking acceptance of coal-fired power plants are considered as bounds [29]. Other non-technological aspects, which have influenced the development of the German energy system in the past, are more or less ignored. Among these aspects are changes in R&D activities, in actor constellations (including coming up of pressure groups and changes in the mix of actors in power plant industries), feedbacks of public attitudes on the policies framework and vice versa, as well as disruptive impacts from global and European level. Hence, the landing process of a technology when being phased out of the regime, as well as non-technological aspects framing the phase-out process are not considered [30, 31]. As an example of a soft landing process, which is strongly governed by factors, which are not considered in bottom-up models, the German nuclear phase-out can be used.

Since the ongoing processes in the power plant sector in Germany cannot be seen as a pure technological substitution process, the MLP approach is a suitable tool for the analysis of the process of pushing back coal-fired power plants into a niche area in Germany and possible pathways for their transition, as it allows for an inclusion of aspects that are beyond the technological sphere. The analysis will contribute to a better understanding of different transition pathways of a predominant but faltering technology.

The paper is organized as follows: The key elements of the employed research method are presented in section “Theoretical background.” In the section “Methods,” we provide information on the incorporation of the data used for the case study. In the section “Results and discussion,” we conduct the analysis and provide detailed information on transition pathways for the sector of coal-fired power plants in Germany. The last section concludes and provides scope for further research.

Theoretical background

In contrast to merely technology- and market-based approaches, which one usually uses for describing the coming up and diffusion of technologies (e.g., [26, 32]), the MLP approach more strongly integrates also political, social, and environmental dimensions of transformation dynamics. The emergence and dissemination of novelties including aspects of repressions of existing structures are explained by paying attention to changes in factors like, e.g., the overall framework and actor constellations. Thus, it is taken into consideration that technological changes do not result only from changes in cost (in combination with technological restrictions) but also from the interaction of a broad range of factors (like social acceptance, regulations, industrial, and infrastructural framework). By considering changes in the use of technology mixes as a result of evolution and coevolution of multidimensional factors, the MLP is particularly suitable for an analysis of complex socio-economic systems such as the transition of the German energy system.

Within the MLP, the elements of the system under consideration are assigned to the levels “landscapes,” “regimes,” and “niches”:

Landscapes encompass given factors like demographic trends, political ideologies, social values, macro-economic patterns, and other factors, which have to be assumed to be more or less fixed from the perspective of the system (Fig. 1). In principle, a landscape changes slowly and is generally independent from the considered system.
Fig. 1
Fig. 1

Multi-level perspective on innovation processes; source, own compilation based on [33]

Regimes reflect the interactions of science, technology, politics, markets, user preferences, rules and institutions. Despite the dynamics within a regime resulting from learning effects and other kinds of ongoing incremental changes, usually regimes display a high degree of stability.

The systems where radical innovations emerge are called niches. These niches are exclusive and protected areas without being exposed to selection pressure from markets [33] or institutionalized evaluation (e.g., security, environmental, or ethical standards). According to Geels [5], niches are characterized by expectations or visions, the building of social networks, and great learning and articulation processes. With respect to stability, clear trajectories and the public supporting structure, three different stages of niche-development can be identified: Niches with a high degree of instability and without significant lobby groups or user associations (Fig. 1, (1)), niches that are characterized by novel technological trajectories with preliminary lobbying activities (Fig. 1, (2)) and niches with new technology supported by powerful groups and which present a potential threat to existing technologies used in the regime (Fig. 1, (3)).

Momentums within the regimes as well as shocks and other kind of stresses on the landscape level can affect the regime by creating windows of opportunities or windows of threats for innovation processes (see, e.g., [34]). Depending on the main features relating to the changes of the regime, the following classification of the transition paths are used (in line with, e.g., [5, 33]):
  • Transformation: The regime changes without recourse to one dominant technology.

  • Technological substitution: The dominant technology is replaced by new radical technologies.3

  • De-alignment and re-alignment: Great problems evolve in the regime, multiple niche innovations emerge, the innovation or combination of innovations which suits best comes to dominate the regime.

  • Reconfiguration: The regime does not only change in terms of the used technologies but also in terms of organizational structures.

All of these different kinds of changes in the regime may affect the position of the predominant technology in the regime. The probability for remaining in the regime will increase if the technology has great unexploited improvement potential, and if the pressure of the regime as well as the pressure resulting from the changes in niches, are strong enough for unlocking this potential. Beside external pressure on an existing regime, the so-called “lock-in” effect [35] or “field logics” [36] determine the strength of the regime to find solutions to face the pressure. Industries, for example, respond to pressures on the regime with modifications in their economic and innovation strategies as well as in strategies focusing on socio-cultural and political frameworks (see, e.g., [4, 35, 37, 38]). In the case of possible disruptions in economic activities of industries, the corresponding industries might get public support (see, e.g., [39]) for avoiding destruction effects in parts of the regime. Using the electricity generation sector in the UK as an example, Geels concludes that “incumbent regime actors in the United Kingdom have used instrumental, discursive material and institutional forms of power to resist climate change-related pressures and to reposition themselves for low-carbon futures without fundamental system change” ([40]:35). The stability of a regime constrains the possibilities for greater changes (see, e.g., [36, 41]). With respect to a transition of a regime (e.g., of an energy system which is based on fossil fuels towards a system that is based on renewables), measures focusing on destabilization of the old regime can support the transition process significantly and should be selected in addition to innovation policies [40, 42]. According to [43], regimes with a great heterogeneity between firms could be destabilized more easily than regimes which consist of firms showing only small differences with respect to technological prerequisites and characteristics.

Changes in an incumbent technology of a regime as well as in the regime itself could be initiated by developments in the niches even if no new technologies enter the market. As an example, the development in the car sector can be used. As Mom [44] pointed out expectations that electric vehicles could become a dominant technology, fostered R&D on combustion engines significantly and resulted in a technological leap (see, e.g., [44, 45]).

The phase-out of a technology could be prevented if there are factors (e.g., on the political level) in the regime that dominate the ones pushing aside the technology. Especially elements of the regime that belong to a strategic sector (e.g., aerospace or military) might be preserved by tight-knit sociotechnical configurations, shared institutions, and enacted by actors with vested interests (see, e.g., [46]). Beside long investment cycles, path dependencies in politics often are responsible for a technology’s continued existence in the regime without great changes. Yet, especially due to an intensification of R&D activities, some technological improvement can result. Thus, the technology has a new design, but still remains in the regime.

In case of a regime change and the coming up of new ideas, structures, and technologies, previous technologies will not stop operating immediately. Our study explores what happens with technologies that are on the list for being replaced. We assume that replaced technologies will be pushed back in a sub-system that is similar to the specification of niches with respect to particular expectations and esteem, a new user base, and adaptation processes. As mentioned above, three different stages of niche development can be identified. The phase-out process of a technology can be described by reversing the order of these stages: At the first stage, the technology is still supported by powerful groups but loses its importance on the market increasingly. In addition, there are growing efforts to change the technology’s design. Like the second stage for technologies in niches, the second stage of the phase-out process is characterized by small networks of supporters. At the third stage, there is a high degree of instability. Significant lobby groups or user associations, which would support the technology, do not exit (see Fig. 1).

There are several possible development paths for a technology that is removed from the regime and into the sub-system mentioned above (Fig. 2, ce):
Fig. 2
Fig. 2

Implications of changes in regime on predominant technologies; source, own compilation

(1) Firstly, if there are proponents who support the technology, the technology could continue to exist even within a small nutshell. Whereas for the new regime, it is not relevant that single actors continue using the technology.

(2) Secondly, the technology will take a role in a different field of application than before, with or without changing its shape (e.g., by merging with other technologies (see, e.g., [45]). The predominant technology is still used, but not in the same way as before. It can be modified in its design or meaning.

(3) Thirdly, the technology may plainly disappear. In this case, there are no supporters in politics, society, and industry anymore because a new technology is entirely beneficial. Using this categorization of possible paths for predominant technologies, we will analyze possible pathways for coal-fired plants in Germany.

Of course, in reality, innovation processes are very complex and often overlapping (see, e.g., [47]). Therefore, the classifications of processes as well as the MLP approach itself are vulnerable to some degree of fuzziness.

Methods

In the following, we employ the MLP approach to analyze possible transition pathways for the sector of coal-fired power plants in Germany. For an assessment of future pathways for coal-fired power plants, it is important to understand how these power plants got their position in the electricity system and why/how their resilience with respect to modifications of the landscape and regime has changed.

Employing the MLP approach, it is possible to structure and link factors which influence the development of the power plant sector by taking aspects beyond economic and technological spheres into consideration. For drawing conclusions on resilience of the power system, we incorporate the development of coal-fired power plants in the past. Since stakeholders which were involved in, e.g., decisions on the prioritization of political targets or on investment cannot (or only in a very restricted way) be consulted, our study relies on literature research.

Beside publications provided by ministries (e.g., German Federal Ministry for Economic Affairs and Energy [4850], Federal Ministry for the Environment, Nature Conservation and Nuclear Safety [5153]), European Commission [54, 55], industry associations [25, 56], NGOs [57], newspapers, and press statements (e.g., statements of unions [58]), we use secondary literature. The literature review is complemented by data mining. Among the databases or datasets used for retrieving information for the power plant sector are, e.g., the power plant database of the Federal Network Agency [24] and the data collection of the Federal Ministry for Economic Affairs and Energy [22].

The information extracted from the different sources is structured and analyzed based on the MLP concept presented in the chapter “Theoretical background.”

Results and discussion

By using a MLP approach, it is possible to analyze changes in a national techno-social system in a systematic way taking the interactions between the socio-economic framework and the technological developments into consideration. Since the ongoing processes in the power plant sector in Germany cannot be seen as a pure technological substitution process, we select the MLP for analyzing the process of pushing back coal-fired power plants into a niche area in Germany.

Presently, coal-fired power plants play a key role in the German energy system, despite the fact that environmental concerns about the coal sector prevail already for a long time (see, e.g., [30]). With an annual electricity production of 273 TWh, coal-fired power plants provide almost 46% of the electricity that is consumed in Germany [22]. Because of the high level of availability, the coal-fired plants are extensively used for supplying the baseload demand for electricity. They play a crucial role in balancing fluctuations in the electricity production of renewables. Politico-economic considerations are––at least regionally––also of high importance in the coal sector due to approximately 35,000 people employed in this sector (incl. coal mining and the power stations themselves) [25]. At the same time, coal-fired power plants are a big perpetrator of global warming due to greenhouse gas (GHG) emissions. In Germany, these power plants emit 255 million tons of CO2 each year which corresponds to 36% of the overall greenhouse gas emissions of the country [22, 59]. Taking into account the high importance of coal-fired power plants concerning GHG emissions, the current energy system, and local employment issues, there is a strong need for detailed analysis of possible phase-out pathways.

Establishment of a regime with coal-fired power plants as key technology

Over a very long period of time, the use of indigenous hard coal was supported in Germany by the government by granting coal-fired power station tax advantages or subsidies.4 Since the extraction of lignite was far more cost-effective than that of hard coal, the support for the two differed. Power stations for both kinds of coal benefited from restrictions on the building of oil and natural gas power stations. The first support schemes for hard coal-fired power plants were introduced already in the 1960s. In particular, decreases in the number of employees in the mining sector (1960: 640.000, 1970: 375.000) and the oil crises in the 1970s motivated the German government (headed by the Social Democratic Party) to expand the support for the use of hard coal in power plants. An example of this is the “coal penny” (“Kohlepfennig”) introduced as compensation for additional costs resulting from using domestic instead of imported hard coal. Power plant owners and coal producers were committed to a “contract of the century” which contained large subsidy programs for the development of long-distance heat supply systems as well as the building of coal-fired CHP power plants (see, e.g., [60, 61]). The support for lignite-fired power plants focused on exemptions of lignite extraction from royalties payable for extraction of resources and from water withdrawal charges [52].

In addition, energy research programs were implemented by the government for supporting the development of new coal power plant technologies with up to 270 million euro (2014 prices) per year [62]. The high share of coal on the overall spending on R&D (up to 60%) for non-nuclear energy technologies highlights the great importance of coal in the German energy policy between 1970 and 1990. In this period, the electricity market was split into regional monopolies with RWE, PreussenElektra AG, Vereinigte Elektrizitätswerke Westfalen (VEW), Bayernwerk, Badenwerk AG, Energie-Versorgung Schwaben AG (EVS), Bewag Aktiengesellschaft, and Hamburgische Electricitäts-Werke AG (HEW) as main players. Regulations on investment control and price supervision set in the Energy Industry Act (Energiewirtschaftsgesetz) aimed to limit market abuse of the monopolists. However, the investment control limited the possibilities for new players to enter the market.

The coal-fired power plants dominated the electricity production whereas coal technologies mainly faced competition from nuclear power plants [22]. The relatively high demand for new coal power plants provided sufficient room for a large number of companies supplying components for power plants.

All in all, coal-fired power plants were well integrated into the regime and were supported by most of elements of the regime: From the government’s viewpoint coal-fired power plants helped to increase energy security (incl. less dependency on fossil fuels from oil exporting countries) and decrease losses of jobs in the coal mining and coal-fired power plant sector. The utilities benefit from a calculable cost for investments and society from employment effects. With the increasing use of coal- and oil-fired power plants, a lot of environmental problems emerged, namely smog and acid rain (see, e.g., [63]). In reaction to environmental concerns, the Ordinance on Large Combustion Plants with emission limits for SO2, NOx, and dust was enacted at the beginning of the 1980s. Because of long transitional periods and the potential for the sector to pass on additional costs, the regulations did not affect the power plant sector significantly.

Coal-oriented regime and lock-in effects

Additionally, there exist lock-in effects which work against a phase-out of coal-fired power plants and keep the technology in the system regime. One of them is the activities of lobbyists and interest groups in the coal sector (e.g., IG Bergbau, Chemie, Energie; Deutscher Braunkohlen-Industrie-Verein; Bundesverband der Energie-und Wasserwirtschaft) (see, e.g., [64]). Beside information and public relation activities, they also try to actively influence the legislative procedure. Their three main arguments for a continued support of the coal sector are high costs of renewables, a threatened energy security, and job losses [65]. Furthermore, many politicians are involved in the coal industry. The environmental association “Greenpeace” published the so-called “Schwarzbuch Kohlepolitik” [66] where 45 German politicians of almost all parties who are supporters of the coal industry are portrayed.

The following example highlights the linkage between politics and the coal sector. Recently, the EU commission decided with a 65% majority that emissions including SO2, NO2, and dust should not exceed the emission levels associated with the Best Available Techniques (BAT) as described in the “BAT reference document for Large Combustion Plants (LCP BREF)” ([67]:6). Thus, the emission limits for German coal-fired plants (with power exceeding 300 MW) have to be reduced significantly. By 2021, the new resolution has to be implemented into the national regulations of the European countries [67]. Germany voted against the proposal. Especially, the German lignite industry was concerned about the required stricter emission limits. Because of a lack of technological feasibility [68], the German government favors a higher limit for SO2 emissions than is required by the EU [69].

A further lock-in effect becomes apparent in the following fact: the 130 German municipalities, administration unions, and municipal enterprises are shareholders of around 24% of RWE (the second largest utility in Germany) [70]. A phase-out of coal-fired power plants would imply significant losses in the budget of municipalities. There are also highly localized historical reasons for sticking to an old technology, in particular coal mining which is often seen in melancholic terms, and acts as a further lock-in effect [71].

Disturbances of the regime

The situation for coal-fired power plants began to change in the 1990s. At the beginning of this decade, the “Electricity Feed-In Act” was enacted aiming to increase the use of renewables for electricity generation. In 1995, the coal penny was declared to be unconstitutional. A renewed amendment of the electricity generation law and new regulations for compensations resulted (see, e.g., [60, 72]). In consequence, the volume of electricity generated from domestic hard coal gradually decreased. The liberalization of the electricity market (forced by activities on the European level) and the repeal of the quasi-prohibition5 of the construction of gas- and oil-fired power stations at the end of the 1990s represented another drastic break for the coal power industry. The immediate liberalization of the monopolized electricity market meant that many enterprises were exposed to enormous pressure to decrease their costs, which led to extensive cost-saving measures. Despite the demand for upgrading power plants in East Germany, the power plant construction sector was confronted with a decreasing market (see Fig. 3).
Fig. 3
Fig. 3

Number of coal power plants built per period, source [24]

As a result of the shrinking market, a lot of power plant manufacturers merged. Increasing cost pressure and intentions to secure their position in the new market resulted in companies merging in the electricity sector as well (see, e.g., [73]).

The greatest changes in Germany happened in the last 10 years: Variations in the structure of electricity production are the results of fundamental changes in the framework conditions. Beside (1) impulses from changes on the market for fossil fuels, (2) environmental and energy policies on the international as well as European level, (3) changes in political targets on the national level, (4) R&D activities, and (5) developments on industrial and society levels have impacted the transformation of the electricity system (see, e.g., [23, 30, 74]). Figure 4 shows events on the landscape level (e.g., oil crises, nuclear accidents) which are usually mentioned as examples for events with significant impact on the German energy system and as key characteristics of the modified regime (see, e.g., [30]). Modifications in the regime comprise changes on the governmental level (e.g., introduction of new laws in reaction to shocks on the global level or decisions on the European level) as well as adjustments of the industries’ activities to changes in prices and laws as well as in public perceptions (e.g., with respect to nuclear energy).
Fig. 4
Fig. 4

General outline of the development of the German electricity supply system; source, own compilation

Although the regime was confronted with greater challenges, with a technological availability of more than 90% and with a comparable high flexibility, coal-fired power plants still remained as an important pillar in the electricity supply system. This manifests in a contribution of 37% on the overall electricity production [22]. Due to feed-in tariffs, different kinds of R&D subsidies, and increasing support by the industry and the public, the market for wind and PV technologies rose significantly (see, e.g., [75]). However, wind and PV did not represent a significant threat for the conventional power plants (in particular since gas-fired plants determined the wholesale price).

In addition to ongoing merging processes, the decade from 2000 to 2010 was shaped by the introduction of the Renewable Energy Sources Act (EEG) and its amendments, the “Act on the structured phase-out of nuclear power for the commercial production of electricity” (2002) enacted by the federal government, along with the implementation of emissions trading in Germany (2004), the agreement on the termination of hard coal extraction in a socially acceptable manner by the end of 2018 [76] combined with a strong decrease in the state assistances for coal (see Fig. 5).
Fig. 5
Fig. 5

State assistance for coal from 1999 to 2014, source [61]

Also the energy concept with targets like increases in the share of final energy consumption from renewable energy sources (from approximately 10% in 2010 to 60% by 2050) and an increase in the share of electricity generated from renewable energy sources (from approximately 17% in 2010 to at least 80% by 2050) was a far-reaching occasion for rethinking the role of coal-fired power plants [51, 77]. With increasing use of renewable instead of gas-fired power plants, coal-fired power plants set the price at the wholesale market. Accordantly, it becomes more and more difficult to run coal-fired power plants profitably. Since 2008 at selected points in time, the wholesale prices even have become negative because of low demand and strong wind power outputs. More and more the big utilities realized that despite providing power plant capacity for backup reasons in future, it would be very difficult to make profits (like in the past) with coal-fired power plants due to decreasing prices at the whole market (resulting from extended use of renewables) and increasing actors on the electricity balancing market offering capacity at low cost.

Furthermore, the decrease in the willingness to build fossil-fired power plants was supported by (1) uncertainties about the refinancing of coal-fired power plants resulting from concerns about running costs in the electricity markets, (2) cost increases caused by the emission trading scheme, and (3) lower prices for electricity on the wholesale market resulting from an increasing share of renewables in the regime (see, e.g., [56, 78]).

This uncertainty largely originates from rising public criticism on the building of new coal-fired power plants. Due to very low CO2 prices and comparable high-fuel prices, the running costs of coal-fired power plants are still lower than the ones of gas-fired plants. Thus, the utilities are interested in using their existing coal-fired plants for as long as possible. Despite a high increase in R&D expenditures for renewables, the public R&D expenditures for fossil power plants had been still on a relatively high level [62]. The big utilities as well as many other stakeholders had the hope, that if the efficiency of coal-fired plants increased, CO2-reduction targets would not affect their use dramatically in the mid-term [50].

Destabilization of the role of coal-fired plants in the regime

Usually, the Fukushima disaster in the year 2011 is mentioned as the turning point for German energy policy (see, e.g., [79]) and [74]). However, the starting point of restructuring the German energy system towards a low-carbon one was set in the years before by implementing the “German Energy Concept” (see, e.g., [64]). Additionally, the disaster changed the attitude of the German government with respect to the use of nuclear energy [31, 80]. The energy package which was released in 2011 includes new laws like the Nuclear Energy Act with a warm-down of German nuclear power plants until 2022; the Act to Restructure the Legal Framework for the Promotion of Electricity Generation from Renewable Energy and the Act on Measures to Accelerate the Expansion of the Electricity Grid (NABEG). On a political as well as utility level, there was the hope that by using carbon capture and storage (CCS) technology, coal power plants could still play an important role in the energy system [48]. Decisions on the EU level with respect to CCS and the enforcement of the CCS Act (2012) supported these expectations. However, due to the unforeseeable costs of CCS power plants as well as problems in the public acceptance linked to storage and transport of CO2 and limited storage potential, CCS lost many of its supporters in Germany (and in other countries in Europe) (see, e.g., [79, 81]).

In 2012, an amendment to the Energy Act was enacted which includes restrictions on power plants greater than 10 MW. These power plants cannot be shut down without informing the responsible transmission operator and the Bundesnetzagentur. If one of these power plants is declared as system relevant, its shutdown will be prohibited. In this case, the power plant is not allowed to participate in the wholesale market. Beside gas-fired plants, the “ban on plant closure” also impacts coal-fired power stations. Against the backdrop that Germany will miss its GHG reduction target of 40% (compared to 1990) by 2020 (Fig. 6), additional measures had been specified by the government. The electricity sector was identified as a sector that should contribute greatly to a further reduction of GHG emissions (Table 1). In this context regulations like a “climate levy” for coal power plants have been discussed.
Fig. 6
Fig. 6

GHG Emissions and targets, source [59]

Table 1

Climate action program 2020

Key policy measures

Contribution to greenhouse gas emission reduction (million t CO2 equivalent)

National Energy Efficiency Action Plan (NAPE) (without measures in the transport sector)

Approx. 25–30 million t

(including energy efficiency in buildings)

Strategy on climate-friendly building and housing (contains NAPE measures specific to buildings)

In total approx. 5.7–10 million t

(1.5–4.7 million t of which in addition to NAPE

Measures in the transport sector

Approx. 7–10 million t

Reduction in non-energy-related emissions in the sectors:

 Industry, commerce/trade/services, and waste management

3–7.7 million t

 Agriculture

3.6 million t

Emissions trading reform

Dependent on decisions at EU level

Further measures, especially in the electricity sector

22 million t

Total

62–78 million t

Source: [56]

In 2015, the German government and the energy companies RWE, Vattenfall and Mibrag agreed to put lignite-fired power plant capacities on standby (see Table 2). As compensation for mothballing their power plants, the utilities get 230 million euro per year for the 7 years.6
Table 2

Date of mothballing and decommissioning of lignite-fired power plant units

Operator

Unit

Capacity (MW)

Date of mothballing

Date of decommissioning

Mibrag

Buschhaus

352

October 1, 2016

September 30, 2020

RWE

Frimmersdorf P

284

October 1, 2017

September 30, 2021

 

Frimmersdorf Q

278

October 1, 2017

September 30, 2021

 

Niederaußem E

295

October 1, 2018

September 30, 2022

 

Niederaußem F

299

October 1, 2018

September 30, 2022

 

Neurath C

292

October 1, 2019

September 30, 2023

Vattenfall

Jänschwalde F

465

October 1, 2018

September 30, 2022

 

Jänschwalde E

465

October 1, 2019

September 30, 2023

Total

 

2.730

  

Source: [58]

For example, with the updated LCP BREF also the EU put increasing pressure on their member states. Moreover, it seems that even interest groups of the coal industry face up to the downfall of coal-fired energy. So, the German labor union discusses almost solely how a phase-out of coal-fired power plants and coal mines can be conducted with lowest possible impact on the labor market. They rather require a “just transition” [82] than the maintenance of the coal industry.

The transition pathways towards a regime without coal-fired power plants

All in all, the building of new coal-fired plants was canceled because of (1) limited political support, (2) increasing pressure from the growing market share of renewables coming from niches and becoming a central element of the regime, (3) major changes in the power plant construction sector due to a long period of low demand for new power plants in Germany, (4) decreasing public acceptance, and (5) being unable to make a great contribution for reaching the GHG reduction targets. Cost advantages of coal-fired power plants in comparison to gas-fired ones and the advanced age of the existing power plant stock are the main reasons behind the willingness of utilities for putting new coal-fired power plant into operation.

Since gas-fired plants determined the wholesale price, renewables did not threaten coal production. With increasing use of renewable instead of gas-fired power plants, coal-fired power plants set the price at the wholesale market. Therefore, it becomes more and more difficult to run coal-fired power plants profitably. Since 2008 at selected points in time prices even became negative because of low demand and strong wind power outputs. More and more, the big utilities realized that despite providing power plant capacity for backup reasons, in future, it would be very difficult to make profits (like in the past) with coal-fired power plants due to decreasing prices at the wholesale market (resulting from extended use of renewables) and increasing actors on the electricity balancing market offering capacity at low cost (see Fig. 7 for comparison of whole prices and cost for coal-fired power plants).
Fig. 7
Fig. 7

Electricity generation cost and prices on the wholesale market, source [56, 78]. Remarks: EEX 20xx, average price for baseload at the spot market at the corresponding year; assumptions, internal rate of return 10%, 10 $/t CO2; efficiency for hard coal-fired power plant, 46%; lignite-fired power plants, 43%; price for hard coal 75 $/t

Thus, RWE and EON decided to separate the conventional power generation business from their core business by forming new subsidiaries. Vattenfall Germany sold their lignite-fired power plants and the mines in Eastern Germany. A further milestone was set on the 5th of April 2017 when the European association of the energy sector “Eurelectric,” which represents 3500 European utilities, pledged to no longer invest in coal-fired power plants after 2020. Hence, the members of the association, 26 out of the 28 EU countries (except Poland and Greece), committed themselves to the phase-out of coal-fired power plants [83].

It is largely assumed that due to dynamic restructuring processes, the sector will continue to exist in the next decades (Fig. 8). Long payback periods, high-specific investment cost, and the importance of GHG reduction measures (as well as for other kinds of environmental policies) are some of the main characteristics of the sector.
Fig. 8
Fig. 8

Expected changes in installed capacity, source: [105]. Remarks: *without renewables. The scenarios A2030, B2030, and C2030 differ with respect to the assumed speed of the transition process of the Germany energy system. A2030, moderate; B2030, accelerated; C2030, rapid implementation

Taking into account the fact that coal is losing its support from utilities and the public, as well as political support, and that no greater efficiency improvement potential for coal-fired power technologies is seen,7 it can be expected that in future, coal power plants will only be used in niches or disappear completely (Table 3). Currently, it is very unlikely that stakeholders will still favor the technology despite the concerns about coal-fired power with respect to environmental harms and for economic reasons (Table 3, section A).
Table 3

Possible futures for coal-fired power plants

Category

Impacts/challenges (e.g., for politics)

Option for “coal-fired power plants”?

 

Reason

Continued existence in the regime

 (A) Without great changes

Market share of renewables and gas technologies on electricity production will increase only slowly, CO2 emission have to be stored

No

Only limited support for coal by the public, investors/politics

 (B) New design

No

Limited improvement potential, CCS is out of discussion

Continued existence in a niche

 (C) Nutshell technology

Agreement on the period selected coal-fired power plant can be used is needed

Yes (for a limited time)

Specification on remaining lifetime (e.g., with regard to socially responsible layoff schemes)

 (D) New meaning

supporting schemes with focus on capacity are necessary

Yes

Use of existing coal-fired power plants as backup capacity

(E) Disappearance

Public spending on R&D for coal-fired power plant can be cut

Yes (in the long term)

No significant incentives for investments in new coal-fired power plant

Because of limited improvement potential and the loss of support for CCS technology, a continued existence of coal-fired power stations in a new design is not a plausible option in the long run (Table 3, section B).

Instead of this continued existence in the regime, coal-fired power plants will become a niche technology or will disappear completely. Referring to the MLP approach, we describe the transformation of a technology existing originally in the regime, being pushed back into becoming a niche technology. Coal-fired plants may continue to exist as Nutshell technology (Table 3, section C). Some of the coal-fired power plants might be used for electricity production with regard to socially responsible layoff schemes and by meeting requests of the owners of the power plants. In this case, social aspects dominate environmental concerns. Another reason for their further use is a possible need for a local energy supply system. For a use as a nutshell technology, an agreement on the remaining lifetime of the power plants is needed. Such a development will be possible if opponents against coal-fired power plants have come off second best and the use of a low number of coal-fired power plants is seen as acceptable for the public. Since the German government still aims to reach environmental goals and there are powerful pressure groups which want to phase-out coal-fired power plants, it is, under recent circumstances, very unlikely that coal-fired power plants will be in use after 2040.

In principle, it is also possible that coal-fired power plants continue to exist but with a new meaning (Table 3, section D). In this case, most of the coal-fired power plants that are not decommissioned will be used as backup power plants providing capacity instead of electricity. Since the power plant owners would not get revenues from selling electricity, compensation schemes would have to be implemented. This could be done by paying money to power plant owners individually (as is done currently) or by introducing a capacity market. The European Commission might well consider payments to be inadmissible subsidies. Hence, a direct support of power plant operators would be difficult. The introduction of a capacity market seems to be easier. However, a restriction on specific emissions like the 550 g CO2/kWh limit which is currently under discussion on the European level [84] would prevent coal-fired plants from taking part in a capacity market. Even if direct payments or participation on a capacity market were possible, because of acceptance problems and financial risks, a construction of new coal-fired power plants will be out of question. As the requirements (e.g., short ramp-up times) for power plants used as backup capacity are different to those of stations providing baseload electricity, the existing power plants would have to be upgraded.

Eventually, coal-fired plans will likely disappear completely (E). In the long term, it is probable that the use of coal becomes superfluous because some new technology will be more beneficial on all fronts. The public spending on coal-fired power plants would be cut. There would be no supporters in politics, society, and industry anymore. A fast phase-out will become more likely if the Green Party enters government again. The Social Democratic Party (SPD) and Christian Democratic Union (CDU)/Christian Social Union (CSU), which form the current government favor a gradual withdrawal of coal-fired power plants without questioning the phase-out process of coal-fired power plants. In their coalition agreement, they highlighted their intention to reach the 40% GHG reduction target, to increase the share of renewables and to establish a commission with the objective to reduce coal-fired generation. Taking into consideration that even the union parties expect that the phasing out process of coal-fired power plants is unlikely to be stopped, the long term.

Pressure on the owners of coal-fired power plants in combination with uncertain prospects for operating their power plants may trigger an agreement on their part, resulting in a “voluntary” phase-out within a few decades.

All in all, niches could provide room for maneuvering required for the transformation of power plant technology, e.g., with respect to the use of other kinds of fuels (including biofuels and solar radiation). Taking into account the ambitious CO2 reduction targets set by the German government, a renaissance of coal as a main pillar of the German energy system is very unlikely. Thus, coal-fired power plants will not present a threat for new technologies (mainly wind and PV power stations) that will come to dominate the regime.

Effects

The change of the regime will affect Germany in many different ways. Coal-fired power plants (in combination with the coal mining sector) have to be considered as one element in an evolving system that encompasses economic as well as social and environmental aspects (see, e.g., [85]). Beside effects resulting from releasing staff working in power plants and mines, there will also be indirect economic effects because of lower demand for goods and services needed for running the power plants [25]. Changes in income as well as changes in the profits of companies could impact tax revenues which could adversely affect the budget of corresponding local communities.

In Germany, currently about 25 billion euro are spent on coal R&D annually [62]. Phasing out coal-fired power plants means public R&D expenditures can and will decrease which will in turn affect the R&D infrastructure, including research at universities and public research institutes. Less investment in R&D could impact the international competitiveness of power plant components’ producers in Germany. This will ultimately lead to a reduction in exports of power plant components. From 2006 to 2016, public R&D on energy efficiency increased from 24 to 183 million euros, and the R&D for renewables from 103 to 244 million euros. Currently, 40 million euros are spent on fossil fuels. Thus, a spending cut on fossil fuels would not cause a significant damage to R&D spending. The loss in support for coal-fired power plants is an ongoing process. Currently, most political parties agree that in the long term (> 2040), coal will no longer be used for power generation in Germany. Nuclear as substitute for coal-fired power plants is out of discussion because of uncertainties regarding cost and appeals as well as unsolved security and waste problems (see, e.g., [30, 80, 86]). Regarding flexibility and storage options that support an electricity system without coal-fired and nuclear power plants, there are still a lot of open questions. However, there are a lot of R&D projects focusing on storage technologies (incl. “power-to-X” technologies).

Since a phasing out of coal-fired power plants means less coal has to be imported, this could also impact coal exporting countries like Australia, Russia, Columbia, the USA, and South Africa.

In Germany, for cooling purposes the existing thermal-electric power plants need 13 billion cubic meters of fresh water annually (which corresponds to 47% of total water demand [87]). Not only the phasing out of coal-fired power plants but also the closing of opencast pits will result in extensive changes in water management (see, e.g., [88]). In the past, coal-fired power plants were built close to coal mines in order to minimize transportation cost. Since new non-coal-fired power plants are not restricted by such logistical considerations, factors like proximity to consumers of electricity, as well as wind and solar conditions will influence the choice of location for new power stations significantly more. Consequently, with a phase-out of coal-fired power plants, the existing electricity grid will have to be modified. Because new power lines are usually confronted with public perception problems greater modifications of the transmission grid will likely be very time consuming (see, e.g., [89]).

With the phase-out of nuclear power plants in Germany (see, e.g., [86, 90] as well as with phasing out processes of nuclear in other countries (see, e.g. [91]), much experience on the different impacts of replacing a main pillar of many electricity systems has been gained. In Germany, first steps towards phasing out––or at least limiting––the use of nuclear power were taken after the nuclear accident in Chernobyl. The phase-out process of nuclear power started in times of high-excess capacity amounts and will last decades. The phase-out of coal-fired power plants is an even greater challenge as the electricity market is increasingly dominated by renewable energy with fluctuating electricity feed-in and is also linked with significant employment effects on the local level. Hence, the unions, “United Services Trade Union” (Verdi) and “Trade Union for Mining, Chemicals and Energy Industries” (IG BCE) demand a socially acceptable transformation favoring a gradual withdrawal of coal-fired power plants [58, 92].

Without a phase-out of coal-fired power plants, the national GHG reduction targets cannot be reached (see, e.g., [21]). Thus, like Denmark and Great Britain, the German government is interested in defining phase-out paths for coal-fired power plants (see, e.g., [93, 94]). An analysis of the climate research institute “Climate Analytics” reveals that 25% of coal-fired power plants operating in European countries need to be shut down by 2020, rising to 72% by 2025 and reaching 100% by 2030 [95]. Only then, would the EU stick to the Paris Agreement.

Conclusions

By means of the MLP approach, we analyze possible phase-out pathways of coal-related technologies, highlighting that these processes are influenced by different factors. The set of factors includes economic, political, technical elements, and social factors. By using a MLP approach, it is possible to analyze changes in a techno-social system in a systematic way taking the interactions between the socio-economic framework and technological developments into consideration. Since the ongoing processes in the power plant sector in Germany cannot be seen as a pure technological substitution process, we select the MLP for analyzing the process of pushing coal-fired power plants into a niche area in Germany and analyzing possible landings for coal-fired power plants and their related industries. In our case study, the concept for describing processes within niches is applied for the phase-out process of coal. Until now, the concept has only been used for analyzing the emerging of new technologies. We used an approach that is slightly different to the one introduced in the standard literature on MLP because the way back into the niches is linked with experience gained with the predominant technology. This concerns in particular aspects like the design of a technology.

In the past, the regime in which the coal-fired plants are located has shown a lot of dynamics resulting from changes in economic and social frameworks as well as from change in the setting of priorities by decision-makers. For a long time, coal-fired power plants could assert their position in the regime. Yet, against the background of decreasing public acceptance, economic problems resulting from growing use of renewable, and ambitious GHG reduction targets, the coal-fired power sector cannot resist the pressure coming from the regime anymore. Thus, the sector has been pushed onto a phasing out pathway.

In Germany, the governing parties agreed on the establishment of a commission called “Growth, structural change and employment” which is to develop a strategy for phasing out coal-fired power plants. This commission will consist of experts and stakeholders from industries, associations, unions, scientific community, pressure groups, and politicians [96]. The broad range of experts and stakeholders shows that the phasing out process has many facets and could only be assessed by using interdisciplinary approaches. The establishment of the commission shows furthermore that the phase-out process deserves close attention and policies for management, which have to be implemented for ensuring a soft landing of the electricity sector. A management of the niches where the coal-fired power will be pushed could include a protection of space for ensuring a smooth removal of the links between the regime and the technology with respect to, e.g., social and environmental aspects.

The EU encouraged carbon capture and storage as a technology for fossil fuel-based generation in the power sector (see, e.g., [54]); this technology may in principle contribute to a more stable transformation of the electricity sector in Germany. Yet, as Renn and Marshall [30] point out, “[i]nterestingly enough, carbon sequestration (CCS) has never gained much popularity in Germany” ([30]:232). Therefore, CCS is unlikely to contribute to a soft landing of the electricity sector in Germany, despite some analyses suggesting that this technology should not be excluded per se as a climate protection option (see, e.g., [97, 98]). The example of CCS illustrates the complexity of the transformation and the involved different aspects (economic, political etc.), as well as the need for the application of research approaches, like the MLP approach, taking into account these various relevant aspects. Phasing out coal-fired power plants is not only on the agenda in Germany but also in Great Britain and other European countries [99].

Insights gained from applying the MLP approach for the case of Germany, in particular concerning aspects of technologies’ resilience in regimes, can be seen just as well independent of their location. Since not only in Germany but also in other countries, technological developments are determined by a combination of different factors (incl. economic as well as social aspects), the experiences could be used to assess technological transition processes in other countries, too. The MLP approach allows an inclusion of aspects that are beyond economic and technological spheres. Thus, it is a suitable tool for identifying possible beginnings of phasing out processes as well as to assess possible phasing out pathways for other environment harming technologies (without being restricted to a specific country or technology).

Footnotes
1

Besides the objective of climate change mitigation, the alliance strives for the prevention of adverse health effects of coal-use induced air pollution (e.g., respiratory diseases).

 
2

Regarding water demand of power plants and the effects of global changes on this demand, see, e.g., [100] as well as [101].

 
3

Following Rennings et al. [102], we define radical technology as a new technology that reflects a disruptive change over existing commercial technologies and “spurs the development of a new technological trajectory ([102]:335).”

 
4

For more detailed information on priorities of targets set by political actors and on the impacts the priority setting had on the energy system, see, e.g., [23, 30, 50, 103].

 
5

The “quasi-prohibition” of the construction of gas- and oil-fired power stations resulted from the fixing of lower limits for the use of coal for electricity generation in the “Third law on coal for power generation” in combination with governmental supervision of investments in the power plants sector.

 
6

The European Commission assessed the measure and decided that the aid is compatible with the Treaty on the Functioning of the European Union [55].

 
7

There are several ongoing R&D activities focusing on increasing the efficiency of coal-fired power plants. However, even if the generation of coal-fired power plants which are currently under development (advanced ultra-supercritical power plants) reach market maturity, the efficiency will be maximum up to 15% higher than the state-of-the-art coal-fired power plants of 2015 (see, e.g., [104]).

 

Abbreviations

BAT: 

Best Available Techniques

CCS: 

Carbon capture and storage

CHP: 

Combined heat and power

EEG: 

Renewable Energy Sources Act

GHG: 

Greenhouse gas

IG BCE: 

Trade Union for Mining, Chemicals and Energy Industries

LCP BREF: 

BAT reference document for Large Combustion Plants

MLP: 

Multi-level perspective

NAPE: 

National Action Plan on Energy Efficiency

R&D: 

Research and development

Verdi: 

United Services Trade Union

Declarations

Acknowledgements

We thank Lisa Hanna Broska for her very helpful comments.

Funding

This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.

Availability of data and materials

All datasets on which the conclusions of the manuscript rely are mentioned or presented in the main paper.

Authors’ contributions

SV and PK conceived of the presented idea, developed the theory, and performed the computations. DR and TS aided in interpreting the results. All authors provided critical feedback and helped shape the research, analysis, and manuscript. All authors read and approved the final manuscript.

Authors’ information

Dr. Stefan Vögele: Senior Scientist at Forschungszentrum Jülich, Institute of Energy and Climate Research – Systems Analysis and Technology Evaluation (IEK-STE), Germany

Paul Kunz: Phd-student at Forschungszentrum Jülich, Institute of Energy and Climate Research – Systems Analysis and Technology Evaluation (IEK-STE), Germany

Prof. Dr. Dirk Rübbelke: Chair of Economics, especially Resource Economics, at Technische Universität Bergakademie Freiberg, Germany

Theresa Stahlke: Phd-student at TU Bergakademie Freiberg, Schloßplatz 1, D-09596 Freiberg, Germany

Ethics approval and consent to participate

No human participants, human data, or human tissue have been involved.

Consent for publication

Not applicable

Competing interests

The authors declare that they have no competing interests.

Publisher’s Note

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Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors’ Affiliations

(1)
Forschungszentrum Jülich, Institute of Energy and Climate Research – Systems Analysis and Technology Evaluation (IEK-STE), 52425 Jülich, Germany
(2)
TU Bergakademie Freiberg, Schloßplatz 1, 09596 Freiberg, Germany

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