基于最小二乘原理的电力故障录波器通道校正方法

The electric power fault recorder channel calibration approach based on least square

为了保证电力故障录波器的测量精度 ,提出了一种基于线性最小二乘原理的录波器通道校正方法。根据录波器模拟量采样电路的构成 ,采用线性数学模型来描述模拟量通道的输入输出特性 ,在此基础上采用最小二乘准则获得最小二乘意义下的变比参数 ,同时说明了通道相移的计算方法。所提出的算法具有简单、实用、精度高等特点。在WDGL IV型电力故障录波器上的实验结果表明 。

To ensure the measurement precision of the electric power fault recorder,this paper proposes a channel calibration approach based on the linear least square method.According to the components of the recorder analog sample circuit,the linear mathematics model is adopted to describe the input-output property of the channel,and on this condition,the ratio is obtained by using the least square principle.The calculation method of channel phase shift is also illuminated in this paper.The proposed approach is simple and practical and has high precision.The test results on the WDGL-IV electric power fault recorder prove that the channel calibration algorithm is effective in improving the measurement precision.