PMBLDCG based stand-alone wind energy conversion system for small scale applications

This paper deals with a permanent magnet brushless DC generator (PMBLDCG) based stand-alone wind energy conversion system (WECS) for small scale power generation. A buck-boost DC-DC converter is used for controlling the PMBLDCG speed to achieve optimum energy output from the wind turbine without sensing wind speeds. An uncontrolled diode bridge rectifier is used in between PMBLDCG terminals and input of a buck-boost converter. The buck boost converter feeds the generated power to a battery energy storage system (BESS) and consumer loads. A single-phase voltage source inverter (VSI) is used at the DC bus to feed regulated voltage and frequency AC supply to consumer loads. The performance of the voltage and frequency controller is demonstrated as a maximum power point tracker, a load leveler, an active filter along with a voltage and frequency controller.