On the design of shunt active filter for improving power quality

Several schemes and control techniques have been proposed in active power filtering these last years, often assuming that all the components are well sized, or at least they do not affect the control algorithm performance. The first step in designing an active filter is to select suitable values. This allows to reduce costs and avoids a lot of control problems. This paper deals with design, simulation and experimentation of a Shunt Active Power Filter (SAPF) to improve power quality. After recalling and comparing some methods already published in this area, a design procedure of a 20 KVA SAPF is presented. Afterwards, the study of the impact of parameters on signals quality is discussed. In order to control capacitor DC voltage and mains current with fixed carrier PWM in d-q frame, simulated and experimental results are provided to prove parameters choice and demonstrate the effectiveness of the proposed approach.

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