The symbiotic relationship of solar power and energy storage in providing capacity value
The symbiotic relationship of solar power and energy storage in providing capacity value
复制标题
太阳能与储能在提供容量价值方面的共生关系
DOI：
10.1016/j.renene.2021.05.122
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发表时间：
2021
期刊：
影响因子：
8.7
通讯作者：
Jeremiah X. Johnson
中科院分区：
文献类型：
--
作者：
Daniel Sodano;J. DeCarolis;A. Queiroz;Jeremiah X. Johnson
确保电力系统在可变可再生能源高渗透率下的可靠性是系统运营商的一项关键任务。在这项研究中，我们使用负载损失概率模型来估计太阳能光伏发电和储能在这两种技术单独和串联渗透率不断提高的情况下的容量信用，以提供对其潜在协同效应的新认识。太阳能光伏发电渗透率的提高改变了电网的净负荷分布，将峰值净负荷转移到很少或没有太阳能发电的几个小时，并导致每增加一个太阳能发电量，容量信用就会减少。然而，太阳能光伏发电的出现缩短了每日高峰需求的持续时间，从而允许能源有限的存储容量在高峰需求时段调度电力。因此，太阳能光伏和存储在串联使用时表现出共生关系。我们发现，同时使用太阳能光伏和储能对系统可靠性做出了更显着的贡献：与单独部署这两种技术的情况相比，在高峰需求时段，组合容量可增加多达 40%。我们的测试案例展示了冬季和夏季调峰系统之间的重要区别，导致太阳能光伏发电的季节性容量值显着不同。这些发现是及时的，因为公用事业公司更换了老化的调峰发电厂，并将储能作为低碳途径的一部分。
Ensuring power system reliability under high penetrations of variable renewable energy is a critical task for system operators. In this study, we use a loss of load probability model to estimate the capacity credit of solar photovoltaics and energy storage under increasing penetrations of both technologies, in isolation and in tandem, to offer new understanding on their potential synergistic effects. Increasing penetrations of solar PV alter the net load profile on the grid, shifting the peak net load to hours with little or no solar generation and leading to diminishing capacity credits for each additional increment of solar. However, the presence of solar PV decreases the duration of daily peak demands, thereby allowing energy-limited storage capacity to dispatch electricity during peak demand hours. Thus, solar PV and storage exhibit a symbiotic relationship when used in tandem. We find that solar PV and storage used together make a more significant contribution to system reliability: as much as 40% more of the combined capacity can be counted on during peak demand hours compared to scenarios where the two technologies are deployed separately. Our test case demonstrates the important distinction between winter and summer peaking systems, leading to significantly different seasonal capacity values for solar PV. These findings are timely as utilities replace their aging peaking plants and are taking energy storage into consideration as part of a low carbon pathway.