接入直流微电网的DFIG风电机组控制策略  

Control strategy for DFIG wind power generator connected to DC-microgrid

作　　者：王晓兰[1] 王洲[1] 张晓英[1] 包广清[1] 宫玮丽 

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2017年第1期76-82,共7页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(50967001);甘肃省自然科学基金(1107RJZA272)

摘　　要：针对双馈风力发电机(DFIG)组接入直流微电网的应用,研究改进的机组接入直流微电网的拓扑结构,提出适用于这种拓扑结构的定子侧变流器(SSC)和转子侧变流器(RSC)的控制方法.SSC采用计及气隙励磁电流动态分量的气隙电势定向(AEO)控制,RSC采用计及定子励磁电流动态分量的定子磁链定向(SFO)控制,实现了定子侧电压和频率的独立控制、功率解耦以及机组的变速恒频要求.此外,对直流母线的电压波动,采用功率前馈控制,提升了电压波动期间机组有功功率的传输能力.在MATLAB/Simulink下的仿真实验,验证了所提方法的正确性和有效性.Aimed at the technique of doubly-fed induction generator （DFIG） connected to DC-microgrid, an improved topology of doubly-fed induction generator （DFIG） connected to DC-microgrid is investigated and a Control method suitable to this topology is proposed, where a stator-side converter （SSC） and a rotor-side converter （RSC） is set up. The SSC is controlled by air-gap electrodynamic potential orientation （AEO） concerned with dynamic component of air gap excitation current and the RSC is controlled by stator flux-linkage orientation （SFO） concerned with dynamic component of stator excitation current, so that the independent control of stator-side voltage and frequency, decoupled control of power, and varia- ble-speed and constant-frequency condition of the unit are achieved. Besides, the voltage fluctuation of DC bus is controlled with feedforward control of power, so that the capacity of active power transmission of the unit during voltage fluctuation. The simulation test with MATLAB/Simulink has verified the correct= ness and validity of the proposed method.

关 键 词：双馈风力发电机 直流微电网 矢量控制 功率解耦 前馈补偿 

分 类 号：TM315[电气工程—电机]