文档介绍：华北电力大学(保定)
硕士学位论文
双馈异步发电机风电场等值建模研究
姓名:王杰
申请学位级别:硕士
专业:电气工程;电力系统及其自动化
指导教师:栗然
2011-03
华北电力大学硕士学位论文
摘要
本论文分析了以双馈风电机为例的变速恒频风力发电机组的基本结构和工作
原理,在此基础上建立了变速恒频双馈风力发电机的数学模型和其他各个部分的模
型,由此建立了双馈风电机组风电场并网运行的动态数学模型。采用基于风电场输
出特性的等值方法将双馈风电机组风电场等值为一台风机。详细介绍了尾流效应对
风电场不同位置的风机风速的影响,从理论上详细分析了采用基于风电场输出特性
的等值方法在不考虑尾流效应的情况下造成的对等值精度的影响。将基于风电场输
出特性的等值方法与尾流效应模型结合,得到的等值结果与未考虑尾流效应得到的
等值结果对比验证,证明该等值方法考虑尾流影响后得到的等值结果精度有所提
高,而且仿真时间并没有增加。
采用基于风电场输出特性的等值方法与尾流效应模型结合的等值模型,将双馈
风电机组的风电场等值为一台等值机,对该风电场并网后在风速扰动下和风场侧故
障下的运行特性做仿真分析,仿真结果表明双馈风力发电机组风电系统不仅可以保
证风能的最大利用效率,还能使风机的有功和无功调节能力得到充分发挥,从而提
高了双馈风电场接入电网的稳定性,保证整个系统的稳定运行,该仿真结果也证明
了所用等值方法的合理性和有效性。

关键词:变速恒频双馈风电机组;尾流效应;等值机;并网运行

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华北电力大学硕士学位论文
Abstract
The paper mainly presents the principle and structure of variable speed constant
frequency (VSCF) fan such as double-fed induction generator (DFIG), and builds the
mathematic model of all section of VSCF double-fed wind power generation system. On
this basis of dynamic model of doubly-fed machine, dynamic model of DFIG wind
turbine for intergration analysis is established. The wind farm of double-fed induction
generator is equivalenced as one double-fed induction generator using the equivalence
method based on the output characteristics of wind farm (EMOC). The energy loss
caused by wake effect on wind speed of wind turbine in different location is introduced
in detail. It theoretically analyses the influence to equivalent results by EMOC without
considering wake effect. Contrasting the equivalent bined wake effect with
EMOC to the one bined, it proves that EMOC considering wake effect is helpful
to the equivalence accuracy, and the simulation time does not increase.
With the equivalent bined EMOC with wake effect, the wind farm of
doubly fed induction generator is equivalenced as one equivalent generator. The dynamic
process simulations have been studied in condition of variable velocity wind and grid
fault, the sim