A New Approach for Harmonic Compensation Using Single- phase Hybrid Active Power Filter

This paper presents a new approach for harmonic control, and its practical implementation for a single-phase hybrid active power filter. It is a combination of a series active power filter and a shunt passive filter. The shunt passive filter is connected in parallel with a load and suppresses the harmonic current produced by the load, whereas the active filter connected in series to a source acts as a harmonic isolator between the source and load. For active filter control, sinusoidal pulse width modulation (SPWM) is developed and the modulation index is selected by calculating the DC bus voltage of the active filter. The PSpice^reg, Matlab/Simulink^reg and MAX PLUS II^reg softwares are used for simulation and hardware implementation. ALTERA^reg FLEX 10K controller and some peripheral circuits are used. Simulation and experimental results show that the proposed active power filter topology is capable of compensating the load current and voltage harmonic up-to the limit specified by IEC.