Application of sliding fuzzy control on robust algorithm for frequency estimation of distorted signals in power systems

This paper presents a sliding fuzzy control (SFC) to adapt the exponent of robust algorithm to a signal with a variable frequency in a power system. With the aid of SFC, the robust algorithm can more improve the performance of extended complex Kalman filter (ECKF) at the severe variation of frequency. The proposed method is involved in ECKF's algorithm without changing any form; besides, it can enhance the estimation accuracy and reduce the computation time. Results of comparative studies of the technique proposed with the ECKF with robust algorithm (RECKF) and RECKF-SFC are presented in the paper.

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