高压滤波电容器不平衡保护试验研究_肖遥.pdfVIP

第4 卷 第3 期 智 能 电 网 Vol. 4 No. 3 2016 年3 月 Smart Grid Mar. 2016 DOI ：10.14171/j.2095-5944.sg.2016.03.012 文章编号：2095-5944 (2016) 03-0301-06 中图分类号：TM 77 文献标志码：A 高压滤波电容器不平衡保护的试验研究 肖遥，张晋寅，杨晓峰，郑伟，刘畅，黎建平，陆春玉 (南方电网超高压输电公司检修试验中心，广州省 广州市 510663) Test Research on Unbalance Protection for HVDC Filter Capacitor Bank XIAO Yao, ZHANG Jingying, YANG Xiaofeng, ZHENG Wei, LIU Chang, LI Jianping, LU Chunyu (Maintenance and Test Center, Extra High Voltage Power Transmission Co., China Southern Power Grid, Guangzhou 510663, Guangzhou Province, China) ABSTRACT: A series of tests were carried out on site to analyze the tripping phenomenon caused by the frequent operation of unbalance protection for the high voltage filter capacitor bank located at Gaopo-Zhaoqing HVDC link. The tests include the tuning characteristic of the filter, the transformation ratio of current transformers and the protection operation characteristic when unbalanced fault occurred at the high-voltage capacitor. Then the settings for the unbalance protection of capacitor were modified according to the test results and theoretical analysis. KEY WORDS: DC filter; capacitor; unbalanced current protection 摘要：针对500 kV 高肇HVDC 高压直流滤波电容器的不平衡保护频繁动作引起的跳闸现象，现场进行滤波器的调谐特性、 电流互感器的变比特性、以及高压电容器不平衡状态下的保护动作特性试验；然后通过理论分析和试验结果修改电容器不平 衡保护整定值。 关键词：直流滤波器；电容器；不平衡电流保护 0 引言 后，余下完好电容器单元的端电压不应超过1.05 倍 [7] 的额定电压 。 ±500 kV 高坡—肇庆、兴仁—宝安直流输电系 为了彻底查清不平衡保护频繁跳闸的真相，及 统的直流滤波器频繁出现高压电容器不平衡保护 更改保护逻辑和定值，除了进一步的理论分析之 动作跳闸的现象。高坡换流站自 2004 年投入运行