Single-phase active current-source rectifier operated with power factor and Distortion Power Factor control

In this paper, new control strategy of single phase active current-source rectifier (ACSR) able to control Power Factor (PF) as well as Distortion Power Factor (DPF) will be presented. The PF part is based on direct cos φ control with phase shift controller, the DPF part provides active mitigation of selected low-frequency harmonics in trolley-wire current using resonant (R) controllers. The ACSR developed within the research into a new generation of main traction converters employing medium-frequency transformer dedicated for suburban units operating on both ac electrification systems of 25kV/50 Hz and 15kV/16,7 Hz. Proper function of proposed control strategy with a new compensative principle has been verified by simulations and large experimental study made on designed small-scale prototype of ACSR of rated power of 7kVA.