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对铁路电网中MOA在线监测进行研究,在传统基波测量法的基础上,硬件上加入频率自动跟踪电路,实时跟踪电网频率,解决FFT的频谱泄漏问题,软件上小波分析解决现场干扰和去除噪声问题,FFT可方便地得到各次谐波,从而计算出测量所需的阻性泄漏电流。
On the basis of the traditional fundamental wave measurement, the automatic frequency tracking circuit is added to the hardware to track the frequency of the power grid in real time to solve the spectrum leakage problem of the FFT. The software wavelet analysis solves the problem of on-site interference and noise removal The problem with FFTs is that each harmonics can be easily obtained to calculate the resistive leakage current required for the measurement.