南方电网技术2017，Vol.11Issue(8)：1-7,15,8.DOI:10.13648/j.cnki.issn1674-0629.2017.08.001
滇西北特高压直流工程FPT试验中阀误触发保护误动作分析与解决方案探讨
Analysis and Solution Discussion of Valve Misfire Protection Misoperation in FPT of Dianxibei UHVDC Project
摘要
Abstract
In the functional performance tests ( FTP) of Dianxibei UHVDC project, after 700 ms two-phase metal short-circuit fault on AC line at the rectifier side, it is found that valve misfire protection misoperation leads to instant outage of pole 2 in Xinsong Station. In this paper, the cause of valve misfire protection misoperation is analyzed theoretically.It is found that the AC voltage waveform distortion is caused by the interaction between the wave trap coil and the lightning arrester after the unbalanced fault at the AC side of the rectifier station of the Dianxibei UHVDC project.The original low AC voltage criterion of valve misfire protection cannot match the condition and causes misoperation.Finally, two solutions are proposed in which the true RMS and the fundamental component of the AC voltage are used to judge low AC voltage, and the effectiveness is verified.关键词
滇西北特高压直流工程/功能特性试验/避雷器/阻波器/阀误触发保护Key words
Dianxibei UHVDC project/functional performance tests (FPT)/lightning arrester/wave trap coil/valve misfire protec-tion分类
信息技术与安全科学引用本文复制引用
郭海平,刘志江,李书勇,郭琦,夏成军,杜兆斌..滇西北特高压直流工程FPT试验中阀误触发保护误动作分析与解决方案探讨[J].南方电网技术,2017,11(8):1-7,15,8.基金项目
国家自然科学基金资助项目(51577071) （51577071）
广东省自然科学基金资助项目(2015A030313202).Supported by the National Natural Science Foundation of China (51577071) （2015A030313202）
Guangdong Natural Science Foundation (2015A030313202) . （2015A030313202）
