Research On Measuring Technique Of Wind Power And Application Simulating Of BDFM

Development of wind electricity conversion system not merely can save the routine energy resources, but also is favor of the environmental protection and one of the effective ways of improving the makeup of the energy resources and decreasing pollution of the environment. Thus it can bring immediate economic benefits, community benefits and environment benefits. After research present status of home and abroad large-scale wind generation set, from the two model, constant speed wind turbine or variable speed wind turbine, decided the structure and parameter of variable speed constant frequency(VSCF) wind turbine. The operating principal, why and the control system composing are also presented. The (VSCF) control technique is one of the most difficulties and key points in the whole wind generation system.Wind power technology innovation must rely on the research experiments in the laboratory. But laboratory does not have a wind farm, how to process the research of wind power generation technology has become the pressing issue. This paper first puts forward the testing platform concept of full operating mode experiment of wind turbine generators,on which we can adopt the host computer and asynchronous motor controlled by the simulator of wind turbine rotor to replace the wind stream turbine being designed to drag the wind generator to do the research on the wind power techniques. This platform can more fully and truly reflect the real working condition of wind generator in the wind farm by using its operational state feedback and fault detection function, which is really a wonderful helper for the related researcher to do the research on the wind power. Wind energy and the aerodynamic characteristics were introduced clearly; The wind speed, wind-power and pitch adjustment simulation model were simulated by using MATLAB/SIMULINK; The simulation system applied software of wind turbine characteristics and the fault set during the operation of wind turbine were analyzed respectively.firstly studied the detection techniques of wind turbine, and difficult issue of noise measurement and load test comprehensively and deeply; Secondly, this chapter expounded the test method of wind power curve and power quality; Finally, this chapter made a brief introduction on the test center features, and put forwards some new ideas for the operation and development of the testing center.the Brushless doubly-Fed Machine (BDFM) stator rotor's structure and methods are introduced. It can realize asynchronous synchronous operation or doubly-fed models. It can be used in AC adjustable-speed drive in generating systems as a generator, which has good developing future.the proper quantities control of traditional induction machine is introduced simply. Study the basic idea of vector control, vector transform and the constitution of traditional induction machine's vector control system primarily and make out the theoretical basis for BDFMf's vector control.At last, it researches the rotor flux oriented control system of BDFM, builds the power winding and control winding on separate synchronous reference frame, and orients flux separately, which simplifies the mathematical model. On the base of that the paper proposes a rotor flux oriented control strategy according to the dual-synchronous coordinate model, which can realizes the dynamic torque control.The simulation results indicate that this control method with perfect dynamic torque control performance is suitable for BDFM control system.