Instantaneous reactive power theory for real time control of three-phase shunt Active Power Filter (SAPF)

Now-a-days use of nonlinear loads in industries has been increased tremendously which are the source of harmonic currents to be injected in supply system. These harmonics creates power quality issue. The most popular solution to eliminate these harmonics is Shunt Active Power Filter (SAPF) because SAPF can eliminate harmonics easily, overcome voltage sag and improves power factor. SAPF is found to be effective in reducing total harmonic distortion (THD) to acceptable level. Reference current generation is the heart of APF In this paper reference current generation using instantaneous reactive power (IRP) theory is presented. IRP theory is widely used to control active power filters (APFs). Modeling of this technique is implemented in MATLAB/simulink. The system is experimentally implemented using DS1104 card of dSPACE system.