Single-Phase Active Front End Converter with series compensation

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 1 kW and 6 kW for a per phase source voltage of 120 V_RMS. 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 Matlabreg, and a DSP based implementation on a DS1104 of DSPACE are presented