The increasing depletion of fossil fuels, made the world's
growing emphasis on the development and utilization of
renewable energy. Various wind turbines emerge. Two
major trends in the development of wind power generation
systems: on the one hand, the development of greater
capacity single large wind turbine generators, other
developing distributed small and micro wind power
generation system. Large-scale wind power equipment
can reduce the cost of wind power generation, distributed
small wind power generation system, which is designed to
solve distributed remote areas scattered local power supply,
can save the planning and construction of the supply
networks which are hardly cost-effective.