High power, zero ripples active filtering system with power modules operating in parallel

The paper present the model based predictive controller for ripple free, high power active filter (APF) with LCL circuit. The system suppresses LCL resonance and provides control dynamics limited only by circuit parameters. The inverter of an active power filter requires a high PWM switching frequency, therefore high power application has to be realized by using several power modules operating in parallel. There are presented simulations and experimental results achieved for APF system of the rated power 1.2MVA with four 300 kVA power blocks operating in parallel.