Partition-based Network Equivalent Method for Power System Subsynchronous Oscillation Analysis  

作　　者：Chenxuan Wang Weimin Zheng Zhen Wang Yangqing Dan Ping Ju 

机构地区：[1]the Department of Electrical Engineering,Zhejiang University,Hangzhou 310027,China [2]the Economic Research Institute of State Grid Zhejiang Electric Power Co.,Ltd.,Hangzhou 310016,China [3]the College of Energy and Electrical Engineering,Hohai Universtiy,Nanjing 211100,China

出　　处：《Journal of Modern Power Systems and Clean Energy》2024年第1期313-320,共8页现代电力系统与清洁能源学报（英文）

基　　金：supported by the Science and Technology Project of State Grid Zhejiang Electric Power Co.,Ltd.(No.5211JY21N001);the National Natural Science Foundation of China(No.51837004).

摘　　要：Given large-scale modern power systems with pow er electronic converters,the numerical simulation with subsyn chronous oscillation(SSO)faces great challenges in engineering practice due to sharply enlarged modeling scale and high com putational burden.To reduce the modeling scale,network parti tion and equivalent becomes a vital technique in numerical sim ulations.Although several methods have been developed for net work equivalent,a generally accepted rule for network parti tion is still required.This paper proposes that the system can be partitioned into three parts,i.e.,the internal,the middle,and the external subsystems,in which the internal subsystem consists of all power electronic components,the middle subsys tem includes those selected AC dynamic components with de tailed models,and the remaining components and buses consti tute the external subsystem.The external subsystem is further represented by an equivalent RLC network determined by the frequency dependent network equivalent(FDNE)method.In the proposed method,the observability index and the electrical distance index are used to identify the interface between the middle and the external subsystems.Case studies based on a modified Hydro-Quebec system are used to verify the effective ness of the proposed method.

关 键 词：Electrical distance network equivalent subsyn chronous oscillation observability index 

分 类 号：TM614[电气工程—电力系统及自动化]