Adaptive Shunt Active Filter
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Improvement of Power Quality Using Adaptive Shunt Active Filter
Abstract—Problems caused by power quality have great adverse economical impact on the utilities and customers. Current harmonics are one of the most common power quality problems and are usually resolved by the use of shunt passive or active ﬁlters. In this paper, a new control design using artiﬁcial neural networks is proposed to make the conventional shunt active ﬁlter adaptive. The proposed adaptive shunt active ﬁlter can compensate for harmonic currents, power factor and nonlinear load unbalance. A selfcharging technique is also proposed to regulate the dc capacitor voltage at the desired level with the use of a PI controller. The design concept of the adaptive shunt active ﬁlter is veriﬁed through simulation studies and the results obtained are discussed.