Wind Technology

Wind technology in Thailand is implemented at HuaSai District in Nakhon Srithammarat province. It is FD-7X series double-Fed Asynchronous WTGS designed by Changzhou Railcar Propulsion Engineering R&D Centre. The wind turbine has a rate power of 1.5 MW. Rotor diameter is 77 m, corresponded to rated wind speed of 11.5 m/s. The wind turbine is horizontal-axis type, upwind design with 3 blades. When asynchronous generator rotor works within the certain upper and lower range of synchronous speed, it can be operated under the state of electricity generation: both ends feed back electricity and generator stator winding directly feeds electricity to grid; when rotor speed is higher than synchronous speed, electricity is transmitted to grid after rotor winding current adjusted and controlled by transducer. Rotor power flows to both directions, and leads to decouple control of active power and reactive power of generator. A technical expert is required to operate and maintain the system.