湖南电力 ›› 2023, Vol. 43 ›› Issue (5): 129-133.doi: 10.3969/j.issn.1008- 0198.2023.05.019

• 新技术及应用 • 上一篇    下一篇

基于电力生产实际的配电网电容电流测试新方法

饶新亮1, 龚鹤腾1, 胡海宁1, 石英春2, 刘维可3, 田睿4   

  1. 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
  • 收稿日期:2023-06-14 修回日期:2023-07-20 出版日期:2023-10-25 发布日期:2023-11-03
  • 作者简介:饶新亮(1994),男,江西抚州人,硕士,工程师,通信作者,研究方向为配网电容电流测量、治理。
  • 基金资助:
    湖南省自然科学基金项目(2023JJ60239)

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

RAO Xinliang1, GONG Heteng1, HU Haining1, SHI Yingchun2, LIU Weike3, TIAN Rui4   

  1. 1. State Grid Changsha Power Supply Company, Changsha 410015, China;
    2. School of Transportation and Engineering, Central South University, Changsha 410075, China;
    3. State Grid Hunan Electric Power Company Limited Research Institute, Changsha 410208, China;
    4. State Grid Hunan Extra High Voltage Substation Company, Changsha 410004, China
  • Received:2023-06-14 Revised:2023-07-20 Online:2023-10-25 Published:2023-11-03

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。

关键词: 电容电流, 消弧线圈, 配电网, 测量方法

Abstract: 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.

Key words: capacitive current, arc suppression coil, distribution network, measurement method

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