Abstract

This paper proposes frequency response based identification of a parallel resonance transfer function in power systems including capacitor banks for power factor improvement. The proposed method is simple and easy to understand by finding undetermined coefficients. Only magnitudes of measured harmonic currents for some orders of both source and load are required. Validation of the proposed method is given in frequency domain and time domain by Bode plots and current waveforms, respectively. Simulation and experimental results are in good agreement. The proposed method is useful for a controller design of an active power filter in anti-parallel resonance.

Key words: Transfer function, identification, parallel resonance, harmonic, frequency response.