气候变化领域集成服务门户(CCPortal): Energy storage reduces costs and emissions even without large penetration of renewable energy: The case of China Southern Power Grid

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DOI	10.1016/j.enpol.2021.112711
	Energy storage reduces costs and emissions even without large penetration of renewable energy: The case of China Southern Power Grid
	Li M.; Shan R.; Virguez E.; Patiño-Echeverri D.; Gao S.; Ma H.
发表日期	2022
ISSN	0301-4215
卷号	161
英文摘要	Variable renewable energy (VRE) and energy storage systems (ESS) are essential pillars of any strategy to decarbonize power systems. However, there are still questions about the effects of their interaction in systems where coal's electricity generation share is large. Some studies have shown that in the absence of significant VRE capacity ESS can increase CO2 emissions. This paper shows that contrary to this intuition, ESS reduces operational costs and emissions even without higher penetration of VRE in power systems with large shares of coal. It also shows that when combined with VRE, ESS delivers higher benefits. These findings are based on the examination of China Southern Power Grid under seven VRE and ESS penetration scenarios. Results show that at the 2018 penetration levels, ESS alone reduced operational costs by 2.8% and CO2 emissions by 1% and that by being paired with VRE, these reductions increased to 8.1% and 6.5%, respectively. The results clarify the synergy between ESS and VRE and explain the underlying mechanism. While VRE lowers coal units’ economic efficiency and environmental performance (measured in RMB/MWh and kg CO2/MWh), ESS offsets this effect by increasing large coal units’ power generation and improving their efficiency. ESS reduces coal consumption and CO2 emissions by substituting power generation from low-efficiency coal units with electricity from high-efficiency units and allowing them to operate at levels closer to full capacity and avoid start-ups. © 2021 Elsevier Ltd
英文关键词	China Southern power grid; CO2 emissions; Coal power; Energy storage system; Variable renewable energy
语种	英语
scopus关键词	Carbon dioxide; Coal; Coal storage; Electric energy storage; Electric power transmission networks; Environmental management; Renewable energy resources; China southern power grid; CO 2 emission; Coal power; Coal units; Energy storage system; Power; Power grids; Power- generations; Storage systems; Variable renewable energies; Cost reduction; alternative energy; carbon dioxide; carbon emission; cost analysis; electricity generation; energy storage; power generation; China
来源期刊	Energy Policy
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/256416
作者单位	School of Economics and Management, Beihang University, Beijing, 100191, China; Future Cities Lab, Beihang University, Beijing, 100191, China; Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, United States; Nicholas School of the Environment, Duke University, Durham, NC 27701, United States; Beijing Representative Office, Rocky Mountain Institute, Beijing, 100020, China; China Investment Corporation, Beijing, 100010, China
推荐引用方式 GB/T 7714	Li M.,Shan R.,Virguez E.,et al. Energy storage reduces costs and emissions even without large penetration of renewable energy: The case of China Southern Power Grid[J],2022,161.
APA	Li M.,Shan R.,Virguez E.,Patiño-Echeverri D.,Gao S.,&Ma H..(2022).Energy storage reduces costs and emissions even without large penetration of renewable energy: The case of China Southern Power Grid.Energy Policy,161.
MLA	Li M.,et al."Energy storage reduces costs and emissions even without large penetration of renewable energy: The case of China Southern Power Grid".Energy Policy 161(2022).