Large-disturbance Stability Analysis of Power Systems with Synchronous Generator and Converter-interfaced Generation  

作　　者：Lei Chen Yong Min Liangshuai Hao Guangzheng Xing Yalou Li Shiyun Xu 

机构地区：[1]Department of Electrical Engineering,Tsinghua University,Beijing 100084,China [2]China Electric Power Research Institute,Beijing 100192,China

出　　处：《Journal of Modern Power Systems and Clean Energy》2024年第3期997-1002,共6页现代电力系统与清洁能源学报（英文）

基　　金：supported by the National Natural Science Foundation of China(No.U2066602)。

摘　　要：This letter studies large-disturbance stability of the power system with a synchronous generator(SG)and a converter-interfaced generation(CIG)connected to infinite bus.The power system is multi-timescale and first simplified.It is shown that the boundary of region of attraction(ROA)of the simplified model is composed of stable manifolds of unstable equilibrium point(UEP)or semi-singular point(SSP),named anchor points,and singular surface pieces.The type of anchor point determines the dominant instability pattern of the power system.When the anchor point is UEP or SSP,the dominant instability pattern is the instability of rotor angle of SG or the instability of phase-locked loop and outer control loop(OCL)of CIG,respectively.Transition of dominant instability pattern can be analyzed with the relative position relationship between UEP and SSP.The effect of OCL is discussed.When the OCL is activated,the ROA becomes smaller and the system is more prone to instability of CIG.It is necessary to consider the OCL when studying the large-disturbance stability of the power system.

关 键 词：Converter-interfaced generation large-disturbance stability outer control loop phase-locked loop synchronous generator voltage source converter 

分 类 号：TM712[电气工程—电力系统及自动化]