The Mathematic Model And Simulation To VSCF Wind Generation Control System

Development of wind electricity conversion system (WECS) not only can save the routine energy resources, but also is favor of the environmental protection and one of the effective ways of improving the structure of energy resources and decreasing pollution of the environment. Thus it can bring immediate economic benefits, community benefits and environment benefits. This paper introduces the status of research and development VSCF's situation and tendency at home and abroad; and introduce the structure of VSCF wind generation system and basic theory; decideding the structure and parameter of variable speed constant frequency (VSCF) wind turbine on the basis of constant speed and variable speed wind turbine at present.On doubly-fed VSCF wind generation system, this paper presented the relationship of voltage, current, power and torque in doubly-fed generator, based on equivalent circuit. Building mathematical model of doubly-fed generator, this paper have founded the rotating axis frame and obtained the stator flux field oriented control strategy. Thus you can get the linear control characteristic like DC motor.Through the analysis of the work principle and topology frame of three phases voltage resource PWM converter, The design has set up the mathematic models, studied the control strategy, showed that three-phase PWM converters are advantageous in the following characteristics: good input and output characteristics, less harmonic energy and two-way energy flow high power factor.Finally proceed the netting experiments by using equipment in library, we can conclude that netting power of doubly-fed generator using oriented control strategy have the advantage of quickly synchronizing speed and small impactive current. The experimental results show that the simulation models of wind turbine generator control system are correct.