Single-phase active front end converter with series compensation

Abstract

This paper presents the study of series compensation effects on a Single-phase Active front end rectifier (AFER). It's known that this kind of converter with a highly sourced inductor cannot transfer a large amount of power to the load without over sizing the converter. That's the case when a synchronous machine with a large transverse reactance is used in wind generation. The main idea here is to add a capacitor in series with this source to compensate for the large inductor effect. This can also be achieved by increasing the dc voltage if it's possible. The study is limited to the power between 1kW and 6 kW for a per phase source voltage of 120 VRMS. The state-space averaged model of the converter is used to compute the transfer functions and to design the controllers. A solution to the maximum transfer power to the load is proposed. A useful diagram is also deduced to achieve this power transfer at unity power factor. Simulation and experimental results using respectively SPS and Simulink of Matlab®, and a DSP based implementation on a DS1104 of DSPACE are presented. © 2006 IEEE.