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Analysis and Operation of FPGA-based Hybrid Active Power Filter for Harmonic Elimination in a Distribution System

This paper describes the design of Hysteresis Current Controller (HCC) for a single-phase Hybrid Active Power Filter (HAPF) using Simulink and Xilinx System Generator as a design platform. At the present age, elimination of harmonics produced by the nonlinear loads to improve the power quality is a great issue. To overcome the problem due to harmonics, Active Power Filters (APFs) are used with various control schemes. But Hybrid Active power filter is a power electronic device which has both the characteristics of passive power filters and active power filters, helps in cancelation of the harmonics by producing compensating signal. The digital controller design and its simulation are presented, showing acceptable THD results for the word length used in the fixed-point computations involved in the switching sequence generation.