Modeling and control of hybrid power filter using p-q theory

The paper presents design of hybrid active power filter (HAPF) in a three-phase three-wire power system. Design is implemented with instantaneous reactive power theory for control of HAPF in order to mitigate harmonics generated by both non-linear and unbalanced load at the point of common coupling (PCC). The p-q Theory enables the source current to be decomposed in αβ0 frame to obtain compensation current for each phase. The hysteresis-band current controller is used to generate gating pulses for voltage source inverter (VSI). Over all harmonic reduction is achieved via the proposed control of HAPF and the THD levels are per the IEEE-519 standard. Investigation of proposed scheme is validated by extensive simulations using MATLAB/ Simulink Sim-Power System tool box.