Hybrid active power filter with GaN power stage for 5kW single phase inverter

This paper presents a hybrid active power filter (APF) with DrGaNplus module for a 5kW single phase inverter. Considering the low voltage stress on the devices in hybrid APF, a module integrated with gate driver is selected to achieve high power density and high efficiency for the overall system. An effective control is proposed to keep the APF capacitor from depleting, while at the same time managing the energy ripple to keep the DC link voltage ripple low. A hardware prototype of a 5 kW single phase inverter with a 400 VA hybrid APF has been demonstrated in the lab. Simulation and experimental results have been provided to verify the feasibility of the proposed hybrid APF.