Estimation of Power System Frequency Using Adaptive Notch Filter

Author

Karimi-Ghartemani, M. ; Bakhshai, A.R. ; Mojiri, M.

Author_Institution

Dept. of Electr. & Comput. Eng., Toronto Univ., Ont.

Volume

2

fYear

2005

fDate

16-19 May 2005

Firstpage

1494

Lastpage

1497

Abstract

An algorithm based on the concept of adaptive notch filter (ANF) is proposed for estimation of power system frequency. The ANF is a second-order notch filter that is further furnished with a nonlinear differential equation to update the frequency. Performance of the algorithm is compared with that of a newly introduced algorithm which is based on using an enhanced phase-locked loop (PLL) system. Unlike the PLL-based frequency estimator, the proposed algorithm does not employ voltage-controlled oscillator (VCO). This makes its structure much simpler for implementations. Transient response of the proposed estimator is faster than the PLL-based estimator. Computer simulations are presented to highlight the usefulness of this approach in estimating near nominal and off nominal power system frequency

Keywords

adaptive filters; frequency estimation; nonlinear differential equations; notch filters; phase locked loops; power system harmonics; power system measurement; transient response; adaptive notch filter; frequency estimator; nonlinear differential equation; phase-locked loop system; power system frequency estimation; transient response; voltage-controlled oscillator; Adaptive filters; Adaptive systems; Computer simulation; Differential equations; Frequency estimation; Phase locked loops; Power system simulation; Power systems; Transient response; Voltage-controlled oscillators; ANF; Adaptive notch £lter; PLL; Power system frequency estimation;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2005. IMTC 2005. Proceedings of the IEEE

Conference_Location

Ottawa, Ont.

Print_ISBN

0-7803-8879-8

Type

conf

DOI

10.1109/IMTC.2005.1604400

Filename

1604400