一起换流站极母线直流电压测量异常原因分析
 

陈明佳，王靓，荣军，卢雯兴，黄聪，李顺
（中国南方电网超高压输电公司柳州局，广西 柳州 545026）
 

    摘 要：针对±500 kV 桂中换流站双极先后出现极母线直流电压测量异常的情况，从测量异常现象入手结合直流电压测量装置原理，依据现场检查结果初步确定了故障位置。通过现场复现式仿真实验，确定了故障原因为远端模块箱体接地不良造成其前级电路的电阻一端浮空，通过在远端模块箱体增加屏蔽接地线等方法，消除了测量异常。
    关键词：直流电压测量装置；远端模块；屏蔽接地；复现式仿真实验
    中图分类号：TM933.2     文献标识码：B     文章编号：1007-3175(2017)04-0046-04
 

Analysis About Abnormal Pole Bus Direct Current Voltage Measurement in Convertor Station

 

CHEN Ming-jia, WANG Liang, RONG Jun, LU Wen-xing, HUANG Cong, LI Shun
（Liuzhou Bureau of China Southern Power Grid Extra High Voltage Power Transmission Company, Liuzhou 545026, China）
 

    Abstract: Aiming at the abnormal high fault condition of bus voltage UdL happened one after another in ±500 kV Guizhong Converter Station’s twin poles, starting from abnormal measurement and combining with the principle of direct current voltage measuring device, this paper preliminarily confirmed the fault location according to the onsite inspection results. The onsite reproduction simulation experiments show that the imperfect grounding of remote terminal unit box caused one end earth free of its preceding stage circuit resistance. The way to add shielding grounding etc. for remote terminal unit box could eliminate abnormal measurement.
    Key words: direct current voltage measuring device; remote terminal unit; shielding grounding; reproduction simulation experiment
 

参考文献
[1] 欧开健. 电压测量偏差对直流输电系统影响仿真研究[J]. 南方电网技术，2008，2(1)：28-30.
[2] 国网运行有限公司. 换流器及直流控制保护设备[M]. 北京：中国电力出版社，2009.