构网型储能对新能源多场站短路比的影响分析  

Analysis of the impact of grid-forming energy storage on multiple renewable energy station short-circuit ratio

作　　者：郑如强 高保皓 ZHENG Ruqiang;GAO Baohao(Economic Technical Research Institute of State Grid Ningxia Electric Power Co.,Ltd.,Yinchuan Ningxia 750004,China)

机构地区：[1]国网宁夏电力有限公司经济技术研究院,宁夏银川750004

出　　处：《宁夏电力》2023年第4期1-8,共8页Ningxia Electric Power

摘　　要：新能源多场站短路比(multiple renewable energy stations short-circuit ratio,MRSCR)是衡量电力系统支撑强度的重要指标,构网型储能对提升MRSCR具有重大意义。首先,介绍构网型储能的基本结构,对构网型储能的功率与频率电压的关系进行分析,通过理论推导和仿真结果验证了构网型储能具有虚拟同步发电机特性,可等效为传统电源向交流系统提供短路容量;然后,基于等值阻抗矩阵揭示了构网型储能对MRSCR的影响机理;最后,结合算例验证了构网型储能对MRSCR的提升作用。Multiple renewable energy station short-circuit ratio(MRSCR)is a crucial indicator in assessing the resi-lience of power systems.Grid-forming energy storage plays a significant role in enhancing this ratio.The paper begins by outlining the fundamental structure of grid-forming energy storage and then analyzes the interrelation between the power and frequency voltage.Through theoretical deductions coupled with simulation studies,the grid-forming energy storage is demonstrated to possess the characteristics of a virtual synchronous generator,analogous to the traditional power sources providing short-circuit capacity to the AC system.Then,based on an equivalent impedance matrix,the underlying mechanism of how the grid-forming energy storage impacts the MRSCR is revealed.Finally,a case study is presented to validate the positive effect of grid-forming energy storage on enhancing MRSCR.

关 键 词：构网型储能 新能源多场站短路比 同步发电机 等值阻抗矩阵 

分 类 号：TM732[电气工程—电力系统及自动化]