双馈异步发电机风电场聚合模型研究  

An Aggregated Model of Wind Farm Composed of Doubly Fed Induction Generators

作　　者：夏安俊[1] 鲁宗相[1] 闵勇[1] 阮佳阳 赵俊屹[2] 杨超颖[2] 

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学),北京市海淀区100084 [2]国网山西省电力公司,山西省太原市030001

出　　处：《电网技术》2015年第7期1879-1885,共7页Power System Technology

基　　金：国家863高技术基金项目(2011AA05A103)~~

摘　　要：提出了一种风电场内输入风速不同的多台风电机组的单机等值建模方法。在机组参数相同的条件下,以风电场的有功功率及无功功率输出、动能的变化率、传动链损耗保持不变为原则,对机组的风轮、传动链、发电系统及主控系统进行等值变换,给出了相关参数的计算方法,同时给出了等值风速的计算方法。以"在公共连接点短路阻抗相等"为原则,对风电场内的电力网络进行单阻抗等效。建立了包含4台参数相同的2 MW双馈风电机组风电场详细模型和相应的等值模型,通过仿真分析分别对比这2种模型在随机风速和电网故障情况下的输出特性。结果表明,该方法得到的等值聚合模型具有很高的精度,适用于具有相同参数双馈风电机组的风电场建模。A single-unit equivalent modeling method for multi wind power generating units in a wind farm under different wind speeds is proposed. Under the same parameters of the generating units and based on the principle that the active and reactive power outputs of the wind farm, the kinetic energy change rate and the loss of the drive trains are kept constant, the equivalent transformation of wind wheel, drive train, generation system and main control system are performed and the computing methods for relevant parameters as well as that for the equivalent wind speed are given. Taking the equality of short-circuit impedances at the point of common coupling（PCC） as the principle, the single-impedance equivalence of power network within the wind farm is carried out. A detailed model of a wind farm composed of four double fed induction generators（DFIG） with rated capacity of 2 MW, which possess the same parameters, and corresponding equivalent model are built, and the output characteristics of the two models during stochastic wind speed and under power grid faults are respectively compared and analyzed by simulation results. Simulation results show that the equivalent aggregated model obtained by the proposed method possesses high accuracy and suits to the modeling of the wind farm composed of DFIG units with same parameters.

关 键 词：风力发电 双馈风电机组 风电场 等值建模 聚合模型 

分 类 号：TM614[电气工程—电力系统及自动化]