一种基于多基点自适应高精度电流测量校正算法

An adaptive precision current measurement correction algorithm based upon multi-points

针对故障指示器中平直状开环磁路测量电流精度低的问题,提出一种改进的半环形电流测量磁路和基于改进磁路的多基点自适应电流测量校正算法。该算法将电流测量量程划分为多个区间,每个区间均采用最小二乘法二次校正所测电流值。实际检测结果表明,改进后的磁路和相应电流测量算法对提高电流测量的精度有显著性改善,校正后的测量精度可以达到±1.2%以内,满足现场使用要求。

An improved semi-ring current measurement magnetic path and an improved multi-points adaptive current measurement correction algorithm based upon improved magnetic path are proposed to solve the problem of low current precision in the unclosed magnetic path measurement of fault indicator. The algorithm divides the current measurement range into several intervals,and the least square method is used to correct the measured current values in each interval on second time. The experimental results show that the improved magnetic path and the corresponding current measurement algorithm can improve the accuracy of current measurement,and the accuracy of the corrected measurement can be less than 1. 2%. It is suitable for the application of the field.