Analyze Linearity and Time-Varying Characteristic of Continuous Detecting Distorted Current System Based on LMS Algorithm

The discrete adaptive system have been used in detecting distorted currunt widely. This paper presented an analogy continuous system based on least mean square (LMS) algorithm, and proved that the analogy system has characteristics of linearity and time-varying system. Based on the adaptive noise canceling technology in the signal processing, this paper presented an improved algorithm of LMS for distorted current detection, which can overtake effectively the drawback of normal LMS algorithm. Moreover, the algorithm presented is easy to implement and solve the contravention between the detecting precision and speediness. The simulation results showed that the algorithm´s capability is superior to those of the normal LMS, the proposed approach gives faster dynamic performance and better precision than the normal method.