A Review on PQ Theory Based Shunt Active Power Filter

Abstract

Because of the harmful effects of harmonic currents on power systems, the issue of minimizing their effects has sparked a lot of studies. A shunt active power filter (SAPF) is considered the most trustworthy instrument in this respect. It works by first detecting harmonic currents in a harmonics polluted power system, then generating and injecting corrective mitigation current back into the system to cancel all the identified harmonic currents. One of the most important aspects of correctly implementing a shunt active power filter is to use an appropriate technique for reference current generation. This paper presents one of the most commonly used theories. It is Instantaneous active and reactive power theory(PQ). The paper presents a brief review of shunt active power filters based on (PQ) theory put forward in the last 20 years.