电力系统及其自动化学报2023，Vol.35Issue(12)：134-141,8.DOI:10.19635/j.cnki.csu-epsa.001333
计及柔性直流的系统短路电流实用计算方法
Practical Calculation Method for Short-circuit Current of System Considering VSC-HVDC
摘要
Abstract
The voltage source converter based high voltage direct current transmission(VSC-HVDC)can achieve fault ride-through and continue to operate after a short-circuit fault occurs in the AC system.With the increasingly wide-spread engineering applications of VSC-HVDC,its influence on the short-circuit current of the system cannot be ig-nored.Aimed at the lack of an accurate and practical short-circuit current calculation method for AC system connected with VSC-HVDC,the current characteristics of VSC-HVDC injection system after the short-circuit fault occurs in the AC system are analyzed.Based on the control strategy for VSC-HVDC,the design of a VSC-HVDC equivalent current source in the process of short-circuit current calculation is studied,and the rationality of current source amplitude set-ting is analyzed.On the basis of weakening the coupling effect between VSC-HVDC output current and the voltage at grid-connected point,a three-phase AC short-circuit current calculation method considering VSC-HVDC is proposed,which is based on the superposition principle.Finally,a test system is built,and the effectiveness of the proposed meth-od is verified by electromagnetic transient simulation.关键词
柔性直流输电/低电压穿越/短路电流/等效电流源/叠加原理Key words
voltage source converter based high voltage direct current transmission(VSC-HVDC)/low voltage ride-through/short-circuit current/equivalent current source/superposition principle分类
信息技术与安全科学引用本文复制引用
陈启超,李晖,王智冬,张怡,蒋维勇,王菲..计及柔性直流的系统短路电流实用计算方法[J].电力系统及其自动化学报,2023,35(12):134-141,8.基金项目
国家电网有限公司科学技术项目(5100-202156020A-0-0-00) （5100-202156020A-0-0-00）
