构网型储能并网对新能源多场站短路比关键影响因素研究OA
Research on the Key Factors Influencing the Short Circuit Ratio of Multiple New Energy Stations in Grid-forming Energy Storage Grid Connection
高比例新能源并网导致新能源多场站短路比(multiple renewable energy stations short circuit ratio,MRSCR)难以满足电网安全稳定需求.通过配置构网型储能可有效提升MRSCR.目前,尚无计及构网型储能模型的MRSCR计算方法,难以开展构网储能接入的MRSCR提升措施研究,亟需对构网型储能并网影响MRSCR的关键因素进行深入全面的剖析.因此,基于构网型储能并网后系统短路容量和阻抗矩阵的变化规律,分析了构网型储能提升MRSCR的作用机理.基于构网型储能虚拟阻抗计算原理,提出了计及构网型储能的MRSCR修正计算方法.提取了过流能力、连接电抗、装机容量3个关键影响因素,应用单重、双重因素叠加的方式,定性和定量分析了不同场景MRSCR的差异性变化规律,即条件允许情况下,通过提高构网型储能过流能力、减小与系统的连接电抗、增强其装机容量,有助于MRSCR的提升.在此基础上,结合对某实际电网大型新能源基地进行仿真分析,验证了前述理论分析的正确性,为MRSCR的提升提供了新的理论支撑.
The high proportion of new energy grid integration results in the difficulty of meeting the safety and stability requirements of the power grid due to the multiple renewable energy stations short circuit ratio(MRSCR)of new energy stations.By configuring grid-forming energy storage,MRSCR can be effectively improved.At present,no MRSCR calculation method considers the grid-connected energy storage model,making it difficult to carry out research on MRSCR improvement measures for grid-connected energy storage.It is urgent to comprehensively analyze the key factors affecting MRSCR for grid-connected energy storage.Therefore,based on the changes in system short-circuit capacity and impedance matrix after grid-forming energy storage grid connection,this article analyzes the mechanism of how grid-forming energy storage affects MRSCR.Based on the principle of virtual impedance calculation for grid-forming energy storage,this article proposes a MRSCR correction calculation method that considers grid-forming energy storage.Three key influencing factors are extracted:overcurrent capacity,connection reactance,and installed capacity.By applying a combination of single and double factors,the differential changes in MRSCR in different scenarios are qualitatively and quantitatively analyzed.Specifically,under conditions that permit,increasing the overcurrent capacity of grid-type energy storage,reducing the connection reactance with the system,and enhancing its installed capacity can help improve MRSCR.On new energy base in an actual power grid,the correctness of the theoretical analysis mentioned above was verified,providing new theoretical support for improving the short-circuit ratio of multiple new energy stations.
景志滨;刘开欣;宋墩文;杨学涛;刘昭睿;李洪波
内蒙古电力(集团)有限责任公司电力调度控制分公司,内蒙古自治区 呼和浩特市 010010中国电力科学研究院有限公司,北京市海淀区 100192中国电力科学研究院有限公司,北京市海淀区 100192中国电力科学研究院有限公司,北京市海淀区 100192内蒙古电力(集团)有限责任公司电力调度控制分公司,内蒙古自治区 呼和浩特市 010010内蒙古电力(集团)有限责任公司电力调度控制分公司,内蒙古自治区 呼和浩特市 010010
信息技术与安全科学
高比例新能源构网型储能新能源多场站短路比虚拟阻抗计算
high proportion of new energygrid-forming energy storagemultiple renewable energy stations short circuit ratiovirtual impedance calculation
《电网技术》 2026 (9)
3513-3521,中插4-中插5,11
内蒙古自治区科学技术厅揭榜挂帅项目(2022JBGS0044).Project Supported by Inner Mongolia Autonomous Region Science and Technology Department Unveils Marshal Project(2022JBGS0044).
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