Charging and regulating the DC link voltage of hybrid active series power filters

This paper describes the technique developed to charge and to regulate the hybrid active power filter link DC. The developed strategy is based on the Modified Synchronous Reference Frame Controller. The ability of the hybrid topology in charging and regulating its own Link DC without external sources connection is analyzed. The accuracy and the dynamics are presented, and the measurements of active power demand to perform the task are evaluated. Practical results exhibits the non-active power demanded to charge the Link DC capacitor and the absence of ripple in DC capacitor Voltage. The algorithm is executed in the DSP TMS320F2812 and the inverter switching frequency is 20 kHz.