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A new dc-link voltage controller of a shunt active power filters is proposed in this paper. A fixed and regulated dc-link voltage is necessary to improve dynamic response of shunt active power filter. The dc-link voltage regulation is done by a sliding mode control method. Comparison made between the proposed controller and conventional PI regulator that used for dc-link voltage regulation. In this...
Electric arc furnace (EAF) is one of the largest loads in electric power systems. It is highly time varying and nonlinear. Its reactive power variations cause voltage fluctuations in nearby system which is known as flicker. On the other hand the nonlinear voltage-current characteristic causes strong voltage and current harmonics in EAF. To this end Flexible AC Transmission Systems (FACTS) technologies...
This paper proposes a novel robust control scheme based on delay-dependent H∞ for unified power quality conditioner (UPQC) in a microgrid under the influence of the delay and parameter uncertainties. A new UPQC model considering the effects of the delay and parameter uncertainties is established. Then, the H∞ controller is designed based on the cone complementarity linearization (CCL) algorithm. Finally,...
This paper describes an advantageous method for using the capacitor banks in the distribution network, optimally. The aim is to determine the count, location and capacitor values in order to minimize the annual cost resulting from energy losses and capacitor bank's installation cost. Besides, in the case of having nonlinear loads in the network, by installing capacitors in appropriate locations, the...
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