Current Control Technique for Three Phase Shunt Active Power Filter by Using Adaptive Hysteresis Current Controller

In today’s scenario due to market competition there is wide spread use of power electronic equipments in power system but these devises poses non-linear characteristics and fast switching action causes harmonics in the system. Harmonics is predominant power quality issue and generation of harmonics have adverse effect on sensitive equipments. These equipments will continue polluting the system more and more due to built-in compensation and sometimes for the lack of enforced regulations. Power quality issues are of biggest concern because poor power quality result in loss of reliability, increased cost and poor efficiency. Active power filters have been developed over There are different types of active power filters available among which shunt active power filter is extensively considered to eliminate the load current harmonics and reactive power compensation. In this work performance improvement of three-phase shunt active power filter to compensate harmonics current and reactive power to improve power quality is explained for three-phase systems. The insulated gate bipolar transistor based voltage source inverter with DC capacitor is used as active power filter. The shunt active filter employs instantaneous PQ theory for reference current generation. Adaptive hysteresis current controller is used for voltage source inverter switching signal generation and tuning of shunt active power filter which maintain the switching frequency the years to solve these problems to improve power quality by Harmonic Reduction. constant, hence overcoming the drawbacks of hysteresis band current controller. The shunt active power filter generates compensating signal which reduces the harmonic component of the system. DOI: 10.17762/ijritcc2321-8169.15033