DataSheet1_Combined Source-Storage-Transmission Planning Considering the Comprehensive Incomes of Energy Storage System.docx

An energy storage system transfers power and energy in both time and space dimensions and is considered as critical technique support to realize high permeability of renewable energy in future power systems. It contributes to the achievement of China’s long-term carbon emission abatement targets. However, the promotion and application of energy storage are severely restricted due to the high construction cost of energy storage systems and lack of effective compensation mechanisms for peak-regulating ancillary service. In this study, a source-storage-transmission joint planning method is proposed considering the comprehensive incomes of energy storage. The comprehensive income of the energy storage system is divided in detail from the planning level, and the accounting method of energy storage income is proposed. Based on the load fluctuating trend under the condition of the connecting wind power grid, the dynamic electricity pricing methods of power trisection and time trisection are introduced to achieve the dual goals of direct income from energy storage and improving system flexibility. To comprehensively consider the direct income of peak-valley arbitrage and indirect income of energy storage configuration, a coordinated planning model of source-storage-transmission is constructed and tested in the Garver-6 system using the measured data from one province grid in China. The results verify the effectiveness of the proposed methods and show improvements in cost recovery and system flexibility.储能系统（energy storage system）可在时间与空间维度实现功率与能量的转移，被视为未来电力系统实现可再生能源高渗透率的关键技术支撑，有助于达成我国长期碳减排目标。然而，储能系统的建设成本高昂，且缺乏针对调峰辅助服务（peak-regulating ancillary service）的有效补偿机制，严重制约了储能的推广与应用。本研究提出一种考虑储能综合收益的源-储-输电联合规划方法：从规划层面详细划分储能系统的综合收益，并提出储能收益核算方法；针对风电并网场景下的负荷波动特性，引入功率三段式与时段三段式动态电价方法，以实现储能直接收益提升与系统灵活性改善的双重目标。为综合考量储能峰谷套利（peak-valley arbitrage）的直接收益与储能配置的间接收益，本研究构建源-储-输电协同规划模型，并采用我国某省级电网的实测数据，在Garver-6系统中开展仿真测试。仿真结果验证了所提方法的有效性，同时表明该方法可提升成本回收效率与系统灵活性。