关键词: 中性点通过电流, 对地电容电流, 零序电流, Matlab

Abstract: This paper presents a method to measure the capacitance current of neutral point through the parallel damping grounding system of arc suppression coil, which is convenient to realize the tracking and tuning of arc suppression coil. By changing the neutral grounding resistance, the amplitude and phase angle of the current flowing through the neutral before and after the change of the neutral grounding resistance are measured, and the system mismatch degree is calculated by the amplitude and phase angle of the current measured twice, so as to calculate the current value of the system to the ground capacitance. The accuracy of the method is verified by building a model in MATLAB. The simulation shows that the method can effectively measure the current value of the ground capacitance, the acquisition quantity is easy to obtain, and the calculation accuracy meets the requirements. It provides a theoretical basis for the tracking and tuning of the arc suppression coil based on the measured current.

Key words: neutral point through current, ground capacitive current, zero sequence current, Matlab