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

doi:10.3969/j.issn.1008- 0198.2023.05.019

Abstract

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

CLC Number:

TM933.1

RAO Xinliang, GONG Heteng, HU Haining, SHI Yingchun, LIU Weike, TIAN Rui. A New Method of Measuring Capacitance Current for Distribution Network Based on Actual Power Production[J]. Hunan Electric Power, 2023, 43(5): 129-133.

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