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首页> 外文期刊>Electric power systems research >Improved control strategy of DFIG-based wind power generation systems connected to a harmonically polluted network
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Improved control strategy of DFIG-based wind power generation systems connected to a harmonically polluted network

机译：连接到谐波污染网络的基于双馈风力发电机的风力发电系统的改进控制策略

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摘要

This paper presents a coordinated control strategy for the grid-side converter (GSC) and rotor-side converter (RSC) of a doubly fed induction generator (DFIG) wind power generation system connected to a harmonically polluted network. Two improved control schemes are presented for both RSC and GSC, respectively. During voltage harmonics, the RSC is controlled to eliminate the torque and stator reactive power oscillations. The oscillations of the stator output active power or the harmonic components of the stator currents are then compensated by GSC to achieve either constant active power output or sinusoidal output current from the overall DFIG system. In order to provide accurate control of the fundamental and harmonic currents of both GSC and RSC, a current control scheme consisting of a proportional integral (PI) controller and a resonant (R) compensator in the fundamentally synchronous reference frame is presented. The effectiveness of the proposed coordinated control strategy is verified by the simulation results on a commercial 1.5-MW DFIG wind power generation system under harmonically distorted grid voltage conditions.
机译：本文提出了一种双馈感应发电机（DFIG）风力发电系统的电网侧变流器（GSC）和转子侧变流器（RSC）的协调控制策略。分别针对RSC和GSC提出了两种改进的控制方案。在电压谐波期间，控制RSC以消除转矩和定子无功功率的振荡。定子输出有功功率的振荡或定子电流的谐波分量然后由GSC补偿，以从整个DFIG系统获得恒定的有功功率输出或正弦输出电流。为了提供对GSC和RSC的基本电流和谐波电流的精确控制，提出了一种在基本同步参考系中由比例积分（PI）控制器和谐振（R）补偿器组成的电流控制方案。在商用1.5 MW DFIG风力发电系统中，在谐波畸变的电网电压条件下的仿真结果验证了所提出的协调控制策略的有效性。

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