变速恒频双馈异步风力发电机建模与仿真研究

Modeling and Simulation of Variable-Speed Constant-Frequency Double-Fed Wind Generator

变速恒频发电是一种全新高效发电方式,适用于风力发电等可再生能源开发利用。为了实现变速下调节系统的稳定性,根据双馈异步风力发电机原理,建立双馈异步发电机的数学模型,采用变速恒频风力发电机运行特点分析双馈异步发电机控制模型。在STAR-90仿真支撑平台上开发仿真算法,建立双馈异步发电机及其控制的仿真模型,通过仿真验证模型的有效性。仿真实验结果表明,模型能正确反映变速恒频双馈异步风力发电机的运行特性,对实际风电机组的仿真研究及运行分析具有参考意义。

Variable- Speed Constant- Frequency （VSCF） is a new efficient method for generating electric power. It is adaptable to the development of the renewable energy such as wind power. The paper analyzes the theory of doubly - fed induction generator （DFIG） used in wind power, builds a mathematic model of DFIG, and then analy- zes the control model of DFIG according to the operation characteristic of VSCF generator. It uses STAR - 90 simula- tion support platform to develop simulation arithmetic, build simulation model of DFIG and its control system, and validate the model by means of simulation. It is showed by the results of simulation and experiment that the model＇s output is consistent with the operation characteristic of VSCF DFIG, and the analysis result of this paper has reference value for the simulation research and operation analysis of actual wind turbine.