Power quality improvement using a combination of hybrid active power filter and thyristorised controlled reactor

Power quality problems have become the most important concern now a days. Custom Power Devices(CPD) provide a solution for these power quality problems. This paper proposes a hybrid device for power quality improvement. The device includes combination of Shunt Hybrid Active Power Filter (SHAPF) and Thyristorised Controlled Reactor (TCR). SHAPF consists of a shunt active power filter and a tuned passive filter. This device reduces the harmonics and also compensates reactive power. A Proportional Integral (PI) controller is used to generate pulses for the switches of active power filter. Simulation results are compared for various conditions and are found to be satisfactory for reducing harmonic distortions.