Small-signal Stability Analysis of VSCs with Negative-sequence Current Control Based on LTP and HSST TheoryOA
In many countries,the negative sequence current control(NSCC)has been the national standard for connecting renewable energy to power systems.At the same time,the original relationship of voltage source converters(VSCs),commonly used in renewable power generation,shows inherent periodic time-varying characteristics.Considering the pros and cons of the different small-signal models for nonlinear time-varying systems,the comprehensive analysis based on linear time periodic(LTP)and harmonic state-space(HSS)models are introduced to studying the small-signal stability of power systems dominated by VSCs with NSCC.Considering the advantages of the LTP model in stability determination,the stable domains of control parameters are described.Additionally,the structural effect of the decoupled double synchronous reference frame(DDSRF),widely used for separating positive and negative sequences,is compared.Then,considering that the HSS model is a linear time-invariant(LTI)model,and its stability mechanism analysis method is mature,we characterize the interaction among controls based on the participation factor analysis.These comprehensive analysis results are beneficial for understanding the impact of NSCC on system dynamics and provide theoretical support for the optimization of NSCC and DDSRF.Finally,case studies validate the effectiveness of the analysis results.
Jiabing Hu;Zeren Guo;Jianhang Zhu;Yunhe Hou;Yingbiao Li;Buyang Du;Tiezhu Wang;Shicong Ma;Jianbo Guo
State Key Laboratory of Advanced Electromagnetic Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,ChinaState Key Laboratory of Advanced Electromagnetic Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,ChinaDepartment of Electrical and Electronic Engineering,The University of Hong Kong,Hong Kong 999077,China The University of Hong Kong Shenzhen Institute of Research and Innovation,Shenzhen 518057,ChinaDepartment of Electrical and Electronic Engineering,The University of Hong Kong,Hong Kong 999077,China The University of Hong Kong Shenzhen Institute of Research and Innovation,Shenzhen 518057,ChinaState Key Laboratory of Advanced Electromagnetic Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,ChinaState Key Laboratory of Advanced Electromagnetic Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,ChinaChina Electric Power Research Institute,Beijing 100192,ChinaChina Electric Power Research Institute,Beijing 100192,ChinaChina Electric Power Research Institute,Beijing 100192,China
信息技术与安全科学
Decoupleddoublesynchronousreferenceframe(DDSRF)harmonicstate-space(HSS)lineartimeperiodic(LTP)negativesequencecurrentcontrol(NSCC)voltagesourceconverter(VSC)
《CSEE Journal of Power and Energy Systems》 2026 (2)
P.644-654,11
supported in part by the National Natural Science Foundation of China under Grant U22B20122 and U23B20120。
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