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Prosumage of solar electricity: Tariff design, capacity investments, and power sector effects
Energy Policy ( IF 9.3 ) Pub Date : 2021-03-16 , DOI: 10.1016/j.enpol.2021.112168
Claudia Günther , Wolf-Peter Schill , Alexander Zerrahn

We analyze how tariff design incentivizes households to invest in residential photovoltaic and battery storage systems, and explore selected electricity sector effects. To this end, we develop an open-source electricity sector model that explicitly features prosumage agents and apply it to German 2030 scenarios. Results show that lower feed-in tariffs substantially reduce investments in residential photovoltaics, yet optimal battery sizing and self-generation are relatively robust. With increasing fixed parts of retail tariffs and, accordingly, lower volumetric retail rates for grid consumption, households have lower incentives for self-consumption. As a consequence, optimal battery capacities and self-generation are smaller, and households contribute more to non-energy power sector costs. A cap on hourly feed-in by households may relieve distribution grid stress without compromising PV expansion or prosumage models for households. When choosing tariff designs, policy makers should not aim to (dis-)incentivize prosumage as such, but balance effects on renewable capacity expansion and system cost contribution.



中文翻译:

太阳能发电量:电价设计,容量投资和电力行业影响

我们分析电价设计如何激励家庭投资于住宅光伏和电池存储系统,并探索选定的电力部门影响。为此,我们开发了一个开放式电力部门模型,该模型明确地具有pro业业代理人的特征,并将其应用于德国2030年情景。结果表明,较低的上网电价会大大减少对家用光伏发电的投资,但最佳的电池尺寸和自发电能力相对较强。随着零售电价固定部分的增加,以及相应的电网消费量零售价格的降低,家庭对自我消费的动机也降低了。因此,最佳电池容量和自发电量较小,并且家庭对非能源电力部门的成本贡献更大。限制家庭每小时的供电量可以缓解配电网的压力,而不会影响家庭的PV扩展或付费模型。在选择资费设计时,政策制定者不应旨在以此来(消灭)专业消费,而是要平衡对可再生能源产能扩张和系统成本贡献的影响。

更新日期:2021-03-16
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