基于隧道磁阻效應(yīng)的剩余電流檢測方法研究

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中圖分類號：TM933 文獻(xiàn)標(biāo)志碼：A 文章編號：2095-8188（2025）05-0025-09

DOI： 10.16628/j . cnki.2095-8188.2025.05.004

Abstract：Residual current is an important monitoring parameter in power systems.Aiming at the certain defects existing in theresidual current detection methodssuch as electromagnetic current transformer method and magnetic modulation method when measuring various residual currnts，and the respective shortcomings in terms of detection accuracy，sensitivity，zerodrift and other performance aspects，aresidual current detection method basedon the tunel magnetoresistance efect isproposed.The tunnel magnetoresistive sensorandtheaverage value recognition method areused to measure and identify the waveform of various typical residual currents such as AC and pulsating DC.The influence of some parameters on the measurement isanalyzed bybuilding a model and simulation，and the particle swarm optimizationalgorithm is used to optimize the values of some parameters ofthe sensor to improve the performance of the sensor. Through experiments，the measurement accuracy reaches 5% and the recognition accuracy reaches 97% ：

Key words： tunnel magnetoresistance effect； residual current；waveform detection and recognition; particle swarm optimization（PSO）algorithm

0 引言

剩余電流是指低壓配電線路中各相含中性線電流矢量和不為零的電流[1]。（剩余9875字）