Frequency control and unbalances compensation in stand-alone fixed-speed wind turbine systems

This paper deals with the control of a small power wind turbine working in stand-alone mode. The fixed-speed fixed-pitch wind turbine drives a permanent magnet synchronous generator (PMSG), which supplies three-phase and single phase loads. Due to the presence of such consumers, unbalanced voltages appear. In addition, as the loads supplied by this generating unit are variable by nature, frequency regulation must be achieved.