多脉波整流变压器相位测量算法

Phase Measurement Algorithm of Multi-phase Rectifier Transformer

研究基于傅里叶变换的相位测量算法,用傅里叶积分计算测量对象波形的频率,根据实际基波频率对采样数据做整周期截断得到分析数据,减小了非整基波周期截断及基波频率波动带来的截断误差。用MATLAB搭建仿真平台,实现算法并评估其抑制谐波及噪声干扰的效果。全面测试表明算法测量相位差精度高、不确定度小。

This paper explores the algorithm of phase measurement of multi-phase rectifier transformer based on Fourier transform. First, get the signal actual frequency with continuous Fourier integral algorithm; then, make whole period truncation of sample points according to the actual frequency. This procedure reduces the calculation error due to the non-period truncation and fundamental frequency fluctuations. The comprehensive tests in MATLAB have proved that this method could isolate interference signal and get the measure result with high accuracy, low uncertainty from multi-phase signal with interference noise.