Modeling and Simulation of Wind Turbine System Based on AMESim
|School||Beijing Jiaotong University|
|Keywords||WTGS Wind turbine Drive train DFIG System-level model AMESim|
With the constant consumption of conventional energy sources, more and more attention is paid to the issue of resources and environment. Wind energy, solar energy, tidal power and other renewable energy have been developed rapidly in recent years, which provide a method to solve the world’s energy and environment problem. Wind power generation is more economic and environmental and it is became one of the most industrialized new energy power generation, however, as the wind power capacity continues to expand, the issue of wind turbine generation expansion and the influence of wind power connected to the power grid cannot be ignored, so the research to wind power technology should be to based on well established wind turbine generation model.Wind power technology involves many different fields, such as meteorology, aerodynamics, mechanical, electrical and control. At present, the common simulation tools of wind power technology are Matlab/simulink, PSCAD, GH Bladed etc. Although those softwares have more comprehensive electrical function, the analysis of drive train characteristic is insufficient, and the drive train is the most complex and key component of wind turbine generator system (WTGS), whose dynamic performance is predominant. AMESim stands for advance modeling and simulation environment for systems engineering, which offers a complete simulation for the scientific researchers to model and analyze multi-domain. AMESim is already widely used in automobile and other industries, but rarely in modeling of wind turbine. In this thesis, a system-level model of double-fed wind turbine generation is established based on AMESim, the main contents are as following:(1) The characteristics and description method of nature wind are analyzed, the combination wind speed model and engineering wind speed mathematical model are discussed. According to the key point of the model analysis, different wind speed model is adopted.(2) The theory of wind turbine aerodynamic and the process of wind energy captured by wind turbine are analyzed, a wind turbine aerodynamic model is built.(3) Generally speaking, drive train model usually adopt the two-mass model and three-mass model. Based on AMESim, the power-train library provide enriched sub-model of gear transmission. Therefore according to the practical structure, the typical gearbox consisted of one-stage planetary transmission with two spur wheel stages is established.(4) For the electrical parts of wind power generators, the mathematical models of double-fed induction generator (DFIG), PWM converter and power grid are analyzed, the electrical model of WTGS is established and simulation analyzed.(5) Finally, a double-fed wind turbine generator system is integrated and simulation analyzed, the parameter variation of wind turbine generator in start process, operation process and stop process is simulated. From the analysis of the system parameters characteristics, the feasibility of wind power system based on AMESim is discussed.