Design-oriented Transient Stability Assessment for Droop-controlled Converter Considering Grid Voltage Phase-angle Jump  

作　　者：Pingjuan Ge Hailiang Xu Ruitong Mao Chunming Tu Fan Xiao Qi Guo 

机构地区：[1]College of New Energy,China University of Petroleum(East China),Qingdao 266580,China [2]College of Electrical and Information Engineering,Hunan University,Changsha 410082,China

出　　处：《Chinese Journal of Electrical Engineering》2024年第3期63-76,共14页中国电气工程学报（英文）

基　　金：Supported in part by the National Natural Science Foundation of China under Grant 52307230;the Natural Science Foundation of Shandong Province under Grant ZR2023QE156.

摘　　要：Droop-controlled voltage-source converters(VSCs)can provide frequency and voltage support to power grids.However,during a grid fault,VsCs may experience transient instability,which can be significantly affected by both the control parameters and fault conditions.This mechanism has not been fully elucidated in previous studies.In particular,grid-voltage faults are commonly accompanied by a grid voltage phase-angle jump(VPAJ),which is typically ignored in the evaluation of the transient stability of VSCs.To address this issue,this study comprehensively assesses the impact of the VPAJ and key control parameters on the transient characteristics of VSCs.Furthermore,the critical clearing angle and critical clearing time are quantitatively calculated to define the transient stability boundary.In addition,a transient stability-enhancement control method that considers the transient stability constraints is proposed.Finally,simulations and experimental tests are conducted to validate both the theoretical analysis and proposed method.

关 键 词：Droop-controlled VSC grid voltage phase-angle jump(VPAJ) transient stability boundary transient stability assessmentcontrol 

分 类 号：TM73[电气工程—电力系统及自动化]