Analysis of Linearity and Time-Varying Characteristic of Adaptive Detecting Distorted Current System Based on LMS Algorithm

The conventional detecting methods for distorted currents have various limitations and we have introduced adaptive detecting system in power distribution. This paper proved that the detecting system based on least mean square (LMS) algorithm is linear and time-varying adaptive system. Based on the adaptive noise canceling technology in the signal processing, this paper presented an improved LMS algorithm for distorted current detection, which can overtake the drawback of normal LMS algorithm effectively. Moreover, the presented algorithm is easy to implement and solve the contravention between the steady-state accuracy and transient response speed. Simulation results showed that detecting capabilities of the improved LMS algorithm is superior to those of the normal, the proposed approach gives better transient performance and better accuracy than the normal method.