换相失败引起的送端电网暂态过电压抑制措施研究  

Transient Overvoltage Suppression Measures for Sending-end Power Grid Caused by Commutation Failure

作　　者：牛宇昆 文俊[1] 马立民 王书杰 NIU Yukun;WEN Jun;MA Limin;WANG Shujie(School of Electrical and Electronic Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《智慧电力》2021年第11期59-65,96,共8页Smart Power

基　　金：国家重点研发计划资助项目(2016YFB0900604)。

摘　　要：针对高压直流输电及特高压直流输电过程中暴露出来的直流换相失败引起的送端、弱送端电网暂态过电压问题,提出了3种暂态过电压抑制方案。首先基于灵州-绍兴±800 kV特高压直流工程在PSCAD/EMTDC仿真平台搭建模型,然后将换流母线电压波动过程分3个阶段分析换相失败引起送端电网暂态过电压机理,最后提出3类抑制暂态过电压方案并对其有效性进行仿真验证,推荐出最具实用价值的方案。Targeting the problem of transient overvoltage in the sending end and weak sending end grid caused by DC commutation failure in high voltage direct current(HVDC)transmission and ultra high voltage direct current(UHVDC)transmission,the paper proposes three transient overvoltage suppression schemes. Firstly,based on Lingzhou-Shaoxing UHVDC project,the model is built on PSCAD/EMTDC simulation platform. Then according to the simulation results,the mechanism of the transient overvoltage caused by commutation failure is analyzed in three stages. Finally,three kinds of transient overvoltage suppression schemes are proposed,and the effectiveness is verified through the simulation. Furthermore,the most practical scheme is proposed.

关 键 词：高压直流输电 换相失败 暂态过电压 送端电网 无功补偿 

分 类 号：TM743[电气工程—电力系统及自动化]