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This work deals with the design and analysis of a controller for a shunt active power filter. The design is based on combined feedforward and feedback actions, the last using odd-harmonic repetitive control, and aims at obtaining good closed-loop performance in spite of the possible frequency variations that may occur in the electrical network. As these changes affect the performance of the controller,...
Shunt active power filters have proven to be an efficient means to compensate for the negative effects of nonlinear and reactive loads on the power quality of the electrical distribution network. In this context, the control objective is to achieve a power factor close to 1, as well as load current harmonics and reactive power compensation. A useful control strategy for this purpose is repetitive...
This work deals with the design and analysis of a controller for a shunt active power filter. The design is based on combined feedforward and feedback actions, the last using repetitive control, and aims at the obtention of a good closed-loop performance in spite of the possible frequency variations that may occur in the electrical network. As these changes affect the performance of the controller,...
This paper deals with the modeling and control of a 3-phase 4-leg split-capacitor shunt active power filter (APF) topology. The APF is aimed to compensate harmonic phase currents, harmonic neutral current, reactive and unbalanced nonlinear load currents in 4-wire distribution systems. In addition, the DC-link capacitor voltages are regulated and equalized to eliminate the imbalance problem which is...
This paper proposes a closed-loop selective harmonic compensation with capacitor voltage balancing control of cascaded multilevel inverter for high-power active power filters (APF). Firstly, the sum of each phase capacitor voltage is built through absorbing the fundamental active power current from the power system. Further, the capacitor voltage regulation method is presented to balance the voltages...
This paper presents a sliding mode based control strategy applied to a 3-phase 4-wire split-capacitor active power filter. The filter is aimed to compensate reactive power and harmonic distortion in the case of distorted and unbalanced load currents. The sliding mode controller is designed utilizing the systempsilas multivariable state space model in the synchronous dq0 reference frame. The sliding...
Despite the fact that three-wire active power filters have been implemented using both voltage source and current source technology, the research of four-wire current source active power filters has been truly minimal. Only a few topologies have been presented over the years. This paper proposes a four-wire current source active power filter topology for improving the quality of supply in four-wire...
This paper presents a novel online controller for tuning shunt active power filters (APF). The idea of the proposed controller is based upon using a low rating switched-capacitor circuit as online estimator to extract the fundamental reactive component of the nonlinear load current. This reactive component is shifted in appropriate phase using two phase-shifters to obtain a 3phi signal. The line current...
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