海洋高压电机绕组中介质损耗角的校正算法

Marine High-voltage Motor Winding Dielectric Loss Angle Correction Algorithm

介绍了一种海洋高压电机绕组中介质损耗角的校正算法。详述了基于谐波分析法的介质损耗角的计算过程,通过分析谐波算法带来的误差原因,根据误差主要原因窗泄露以及栅栏效应提出了将二者合二为一的校正方法,使用汉明窗加权函数和快速傅里叶变换的校正方法,分别对频率、幅值和相位角进行校正改进,改进的谐波分析法得出的介质损耗值受频率变化波动非常小,在现场测量中得到了充分的验证。

This paper describes a marine high-pressure motor winding dielectric loss angle correction algorithm and outlines China＇s marine expedition equipments and the necessity of preventing insulation accidents in entire power system. Also it introduces the dielectric loss angle calculation process based on the harmonic analysis,and analyzes the error caused by the harmonic algorithm. Then proposed a correction method combing window leak and fence effect of disclosure—the use of Hamming window weighting function and the fast Fourier transform correction method,which corrects the frequency,amplitude and phase angle respectively. The value of the dielectric loss get from improved harmonic analysis method by the frequency fluctuation is very small,measured in the field.