Development of 1-ph hybrid active power filter with an efficient FPGA platform for power conditioning

This paper deals with an advanced digital method to design the control algorithm for a single phase Hybrid Active Power Filter which shows a great promise in reducing harmonics and improvement in power quality. Major point of discussion in this paper includes principle of operation of Hybrid Active Power Filter (HAPF) with an efficient control algorithm for generation of the reference current. Generated reference currents are passed through the fixed band hysteresis current controller to produce switching signals for the Insulated Gate Bipolar Transistor (IGBTs) of the Hybrid Active Power Filter. Hybrid Active Power Filter is the combination of Passive Power Filter (PPF) and Active Power Filter (APF) responsible for producing opposite phase signals for compensation of the harmonics. The considered system is developed in Matlab/Simulink environment using Power system block set and the control algorithm is developed using Xilinx System Generator block set which automatically generates HDL code and can be downloaded to FPGA (Field programmable gate array) kit which is capable of producing faster switching signals for the IGBTs resulting a very good acceptable Total Harmonic Distortion (THD).