变速恒频风力发电机组动态模型及并网研究

分析了风力发电系统的特点，着重介绍了变速恒频（Variable Speed Constant Frequency，VSCF）风力发电机组运行的基本原理．在此基础上，探讨了风力发电机组各部分的仿真建模，并分析了目前适用于不同条件下的双馈感应式异步发电机（Double—Fed Induction Generator，DFIG）变速恒频（AC—Exited Variable Speed Constant Frequency，AEVSCF）风力发电机的数学模型。对含变速恒频风机电网系统的故障扰动过程进行仿真分析．结果验证了建模的正确性。在故障扰动的最后对未来风电机组建模的研究重点提出了一些建议。

Studies on Dynamic Model of Variable Speed Constant Frequency Wind Turbine Generating Sets

With regards to the dynamic characteristics and the influence of wind power generation system on grid stability after grid-connection, it is necessary to research the dynamic model of wind turbine generators sets. This paper analyzes the characteristics of wind turbine generation system, and introduces the principle of the variable Speed wind turbines(VSWT). Based on the mechanism, it approaches the modeling of every part of VSWT, and enumerates the mathematical models of doubly-fed induction generator (DFIG) of AC-exited variable speed constant frequency (AEVSCF) under different operation conditions. Result of the analysis on the simulation of grid faults with AEVSCF shows the model is suitable for simple digital simulation. In the end of the fault disturbance, suggestions are made on the key questions in modeling of VSWT in the future.