引用本文: | 朱清代,张纯,石玉东,等.直流输电单极故障引发接地极线路击穿的定位方法研究[J].电力系统保护与控制,2018,46(12):64-70.[点击复制] |
ZHU Qingdai,ZHANG Chun,SHI Yudong,et al.Research on location method of grounding electrode line fault caused by unipolar fault of HVDC transmission system[J].Power System Protection and Control,2018,46(12):64-70[点击复制] |
|
摘要: |
为实现直流输电单极故障引发接地极线路击穿故障点的快速准确定位,缩短供电恢复时间,提出一种基于换流站故障录波的接地极线路击穿点定位方法。通过理论分析,得到直流输电单极故障情况下换流站中性母线电压UDN振荡频率随接地极线路等效电感的变化规律,结合接地极线路模型并考虑参数频变特性的影响,构建了基于“频率—电感—距离”三者关系的击穿点定位算法。利用西南至华东某特高压直流工程实际故障案例对方法进行了验证。结果表明:该方法的有效性和精度满足实用要求,且无需额外增加换流站软硬件配置,便于工程应用。 |
关键词: 直流单极故障 接地极线路 故障定位 录波分析法 中性母线过电压 |
DOI:10.7667/PSPC170916 |
投稿时间:2017-06-19修订日期:2017-11-08 |
基金项目:国家自然科学基金青年科学基金项目资助(51707019);中国博士后科学基金项目资助(2016M592659) |
|
Research on location method of grounding electrode line fault caused by unipolar fault of HVDC transmission system |
ZHU Qingdai,ZHANG Chun,SHI Yudong,TENG Yufei,LI Xiaopeng,ZHEN Wei |
(State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China;State Grid Sichuan Electric Power Company, Chengdu 610041, China) |
Abstract: |
In order to realize the fast and accurate location of breakdown point of grounding electrode line caused by a HVDC unipolar fault, and shorten the power supply restoration time, a fault location method for grounding electrode line based on fault recorder of converter station is proposed. Theoretical analysis has revealed the relationship between the oscillation frequency of the neutral bus in the converter station UDN and the grounding electrode line inductance, combined with the line model and considering the effects of frequency dependent characteristics, a fault location algorithm based on the quantitative relationship between frequency, inductance and distance is proposed. Practical fault cases of a UHVDC project from Southwest to East China is used to check the method. The results show that the method is effective and accurate, and it does not need to increase the configuration of hardware and software of converter station, so it is convenient for engineering application. This work is supported by Youth Science Fund of National Natural Science Foundation of China (No. 51707019) and China Postdoctoral Science Foundation (No. 2016M592659). |
Key words: HVDC unipolar fault grounding electrode line fault location waveform analysis neutral bus overvoltage |