A Control Strategy for Active Filters Using Quasi-instantaneous Positive Sequence Extraction Filters

摘要

A novel control strategy for active filters, employing quasi-instantaneous positive sequence extraction of utility voltage, can be useful in harmonic polluted and/or imbal-anced utility voltage. In this paper, the authors examined its transient response, its performance under the change of fundamental frequency of utility voltage and its performance under utility voltage with harmonics and unbalance.