CAJ | 학술논문

分析了小电流接地选线装置的现状与选线方法,提出了一种新的基于小波分析和暂态零序电流比幅比相的选线方法。该方法先将电流信号进行小波去噪,然后通过分析计算得到各线路暂态零序电流信号的幅值与极性,并根据所得信息选出故障线路。该方法在电磁干扰背景下仍能正确选出故障线路,并且不受补偿度、故障点以及相角的影响,计算简单可靠。通过Matlab仿真,验证了该方法的准确性与可靠性。
분석료소전류접지선선장치적현상여선선방법,제출료일충신적기우소파분석화잠태령서전류비폭비상적선선방법。해방법선장전류신호진행소파거조,연후통과분석계산득도각선로잠태령서전류신호적폭치여겁성,병근거소득신식선출고장선로。해방법재전자간우배경하잉능정학선출고장선로,병차불수보상도、고장점이급상각적영향,계산간단가고。통과Matlab방진,험증료해방법적준학성여가고성。
Analyzes the wavelet electic current grounding line selection device and select methods,a new line selection methods are proposed based on waveletnalysis and transient zero sequence electric current amplitude and phase comparison.First denoising little wave,then get the amplitude and polarity of each transient zero current signal,finally selects the line according to the information.This method still can select fault line under electromagnetic inteference background.And also it cannot be influenced by compensation degree,fault point and phase angle.The calcuation is simple and reliable.The accuracy and reliability of this method is testified by Matlab simulation.