On-line tracking and mitigation of power system harmonics using ADALINE-based active power filter system

In active power harmonic filtering, harmonic on-line tracking is an essential part of the filtering process. In this paper, an ADALINE-based active-power filter system is proposed. The paper presents an improved on-line tracking scheme which combines the fundamental frequency tracking with an ADALINE-based harmonic analyzer. The proposed scheme is tested on a simulated data and compared with Kalman filter and FFT algorithms. The proposed scheme exhibits better performance when compared with Kalman filter and FFT approaches. As an application, the improved ADALINE tracking scheme is used by a modular active power filtering system proposed by the authors of the paper. The proposed active filtering system shows an excellent performance in tracking and mitigating the harmonic components. The theoretical expectations are verified by digital simulation using EMTDC simulation package.