A 10KVA FPGA-based active power filter for battery charger applications

In this paper, a 10KVA field programmable gate array (FPGA)-based active power filter (APF) suitable for battery charger applications is presented. Based on instantaneous power theory, harmonics and reactive components of load current are extracted and used as reference current for APF to be compensated. Also, a hysteresis current controller is used to generate switching signals for APF. An FPGA-based digital controller is used for practical implementation. Furthermore, Xilinx system generator is used to generate VHDL code for the FPGA. Both simulation and experimental results are presented to verify the effective performance of control strategy and FPGA-based digital controller.