Aiming at the problem of low power metering accuracy in electric vehicle charging process,a power metering model combining wavelet transform and adaptive Kalman filter was proposed after analyzing the characteristics of electric vehicle charging load.In addition,an electric power measurement evaluation model is constructed to evaluate the accuracy of electric power measure-ment.Experimental results show that the proposed method improves the accuracy of power measurement by 0.1723％and the relative accuracy by 68.12％.In addition,the method has strong anti-harmonic interference,and can reduce the amount of harmonic change by more than 60.23％.Therefore,the electric power metering model constructed in the experiment has strong operability and applica-tion potential.
关键词
充电负载/电力计量/小波变换/自适应卡尔曼滤波/评估模型
Key words
charging load/electric power measurement/wavelet transform/adaptive Kalman filtering/evaluation model
维普
万方数据