Adaptive, closed-loop control of dynamic power filters as fictitious power compensators

摘要

A new control philosophy, utilizing both thyristor-controlled reactive (TCR) sources and dynamic power filters (DPFs) has been proposed by J.H.R. Enslin and J.D. Van Wyk (IEEE Trans. Power Electron., vol.5, no.1, 1990) in the application of fictitious power compensation. This study shows the closed-loop control of a DPF using an adaptive signal processing algorithm based on the cross-correlation between the voltage and current waveforms. The control strategy is based on the derivation of equivalent network parameters, which are calculated from digital time domain cross-correlation signal processing techniques and implemented with the aid of a microcomputer. Practical results under quasidynamic operating conditions obtained from a 15 kVA three-phase dynamic power filter are given.