电网技术2026，Vol.50Issue(9)：3513-3521,中插4-中插5,11.DOI:10.13335/j.1000-3673.pst.2025.0310
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
Research on the Key Factors Influencing the Short Circuit Ratio of Multiple New Energy Stations in Grid-forming Energy Storage Grid Connection
摘要
Abstract
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.关键词
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Key words
high proportion of new energy/grid-forming energy storage/multiple renewable energy stations short circuit ratio/virtual impedance calculation分类
信息技术与安全科学引用本文复制引用
景志滨,刘开欣,宋墩文,杨学涛,刘昭睿,李洪波..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[J].电网技术,2026,50(9):3513-3521,中插4-中插5,11.基金项目
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). （2022JBGS0044）
