Control System Design and Simulation of an AC/DC - DC/DC - DC/AC Power Converter for a Permanent Magnet Wind Power Generator in Rural Power Generation

Abstract

This paper deals with the voltage and frequency control of the generated electricity from a permanent magnet wind-turbine. The wind turbine is directly connected to a permanent magnet synchronous generator in order to avoid the losses associated to the gearbox so that only an AC/DC/AC power converter is used to control the variable voltage and frequency. The AC/DC converter is a three phases diode bridge rectifier, the DC/DC converter consists of a boost converter which keeps the voltage level nearly constant over the whole wind speeds to supply satisfactory a single-phase DC/AC inverter which has four insulated gate bipolar transistors since a single-phase output with constant voltage and frequency is desired.The simulation of the whole system including the permanent magnet synchronous generator and it is verified that the design of the AC/DC/AC power converter and its control strategy work very well and can be readily used in RL loads in rural areas.