The Improvement Of Control Of Doubly-fed VSCF Wind Power Using AC Excited Generator

Energy is essential to the development of today's society may be less of it as a use of the most extensive and most convenient secondary energy, the promotion of a strong level of social productive forces and people's standard of living improved. The power industry in the rapid development of power system capacity in the continuing growth of the power of new technology has endless. The wind power generation system with VSCF can capture energy as much as possible.The research status of wind power generation technology and VSCF technology are summarized in this paper. The thesis introduces the structure of a wind power generation, establishing a simulated model for each part of the system. After studying the mathematical model, the stator field-oriented vector control strategy is issued. The process of active and reactive power regulating is analyzed. It did a series of experimental study including to power network and the adjusting alone of the active power and reactive power.Because the mathematical model of AC excited generation system is complex, non-linear, time changing and coupling, and it is strongly affected by the varying parameter and exterior disturbing. The control performance of traditional PI controller is restricted. Thus fuzzy control is introduced, and a stator field-oriented vector control system based on the fuzzy controller is presented in this paper. Compared with the simulation results of two systems, the fuzzy controller has better dynamic performance, smaller still difference, and it converges rapidly. The ability of robustness has been improved greatly.