摘要
近年来,可再生能源发电系统参与的振荡问题严重威胁电力系统的安全运行。阻抗模型作为分析此类问题的重要工具之一,受到广泛关注。然而,当前阻抗法常用于特定工况下的系统稳定性分析。为了研究工况对稳定性的影响,该文在考虑频率耦合效应的同时,分别对"白箱"和"黑/灰箱"两种情况下的变流器系统进行了全工况小信号稳定性分析,并给出系统在不同电网阻抗下的稳定运行范围,为并网变流器的稳定运行提供了重要的参考。
Recently, renewable power generation involved oscillations have seriously threatened the stability of power systems, and the impedance model(IM) methods, as an important tool for analyzing such problems, have received widespread attention. However, in previous work, IM based methods were usually used to analyze system stability under specific operating conditions. To investigate the impacts of operating conditions, this paper proposed the small-signal stability analyses for both the "white-box" and the "black/gray-box" grid-tied converter system with frequency couplings and all possible operating conditions considered. Thus, the stable operating regions with different grid impedances were obtained, which provides insightful information for the stable operation of the grid-tied converters.
作者
刘威
谢小荣
王衡
王艳辉
LIU Wei;XIE Xiaorong;WANG Heng;WANG Yanhui(State Key Lab of Control and Simulation of Power Systems and Generation Equipment(Department of Electrical Engineering,Tsinghua University),Haidian District,Beijing 100084,China;State Grid Xinjiang Electric Power Company,Urumchi 830063,Xinjiang Uygur Autonomous Region,China;State Grid East Inner Mongolia Electric Power Supply Co.Ltd.,Hohhot 010010,Inner Mongolia Autonomous Region,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2020年第22期7212-7220,共9页
Proceedings of the CSEE
基金
国家重点研发计划项目(2017YFB0902000)
国家电网公司科技项目(SGXJ0000KXJS1700841)。
关键词
并网变流器
全工况稳定性分析
频率耦合
阻抗模型
“黑/灰箱”系统
grid-tied converters
stability analysis under all operating conditions
frequency couplings
impedance model
black/gray-box
