基于电力生产实际的配电网电容电流测试新方法  

A New Method of Measuring Capacitance Current for Distribution Network Based on Actual Power Production

作　　者：饶新亮 龚鹤腾 胡海宁 石英春 刘维可 田睿 RAO Xinliang;GONG Heteng;HU Haining;SHI Yingchun;LIU Weike;TIAN Rui(State Grid Changsha Power Supply Company,Changsha 410015,China;School of Transportation and Engineering,Central South University,Changsha 410075,China;State Grid Hunan Electric Power Company Limited Research Institute,Changsha 410208,China;State Grid Hunan Extra High Voltage Substation Company,Changsha 410004,China)

机构地区：[1]国网湖南省电力有限公司长沙供电分公司,湖南长沙410015 [2]中南大学交通运输工程学院,湖南长沙410075 [3]国网湖南省电力有限公司电力科学研究院,湖南长沙410208 [4]国网湖南省电力有限公司超高压变电公司,湖南长沙410004

出　　处：《湖南电力》2023年第5期129-133,共5页Hunan Electric Power

基　　金：湖南省自然科学基金项目(2023JJ60239)。

摘　　要：以电力电缆为主的配网系统正在逐步取代传统架空线路为主的配网系统,城市配网系统的电容电流快速增长,传统电容电流测量方法已经不能满足电力生产的实际需求。针对电力生产的实际情况,分析传统电容电流测量方法原理和生产应用中的局限性,并针对性提出一种带消弧线圈测量配电网电容电流的方法。该方法通过引入两个新增变量(消弧线圈电感L和阻尼电阻r),重新构建电容电流测量模型,推导出10 kV配网系统对地电容的高阶微分方程,并采用迭代算法进行求解。通过10 kV真型配电网试验场的现场试验,该方法的有效性和正确性得到验证,电容电流测试工作的安全性和效率性得到进一步提升。The distribution network system mainly composed of power cables is gradually replacing the traditional overhead line distribution network system.The capacitive current of urban distribution network systems is growing rapidly,and the traditional capacitive current measurement methods that need to exit arc suppression coils can no longer meet the actual needs of power production.Therefore,aiming at the actual situation of power production,this article summarizes and analyzes the principles and limitations of traditional capacitance current measurement methods in production applications,and proposes a new method with arc suppression coils for measuring capacitance current in distribution networks.This method reconstructs the capacitance current measurement model by introducing two new variables(arc suppression coil inductance L and damping resistance r),derives the high-order differential equation of the ground capacitance of the 10 kV distribution network system,and solves it using an iterative algorithm.The effectiveness and correctness of this method have been verified through the field test of 10 kV real distribution network test field,and the safety and efficiency of capacitive current test effort have been further improved.

关 键 词：电容电流 消弧线圈 配电网 测量方法 

分 类 号：TM933.1[电气工程—电力电子与电力传动]