具有谐波治理作用的双馈风力发电机控制方法
首发时间:2013-07-22
摘要:为了改善电网谐波,本文提出一种基于多旋转坐标系下的转子侧变流器控制方法。首先建立了谐波电网电压条件下各次坐标系下的DFIG 数学模型,并采用指定次谐波角速度同步的旋转坐标变换,将指定次谐波转换为直流量再进行PI控制,由多个独立不同角速度的谐波电流环叠加构成完整的电流控制器,从而实现了使发电机定子侧输出与负载谐波分量极性相反的谐波电流的目标。最后搭建了一台DFIG风力发电机组的仿真模型,仿真结果验证了所提控制策略的可行性。
关键词: 电力系统及其自动化 双馈风力发电机 谐波治理 旋转坐标系
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The control method of the doubly-fed wind turbine with harmonic management function
Abstract:In this paper a control strategy based on the multiple rotating reference coordinates of the rotor-side converter for harmonic suppression is proposed. First, a mathematical model of DFIG in each rotating reference coordinate under the harmonic grid voltage condition is established, the specific harmonic current was transformed into DC components by respective harmonic synchronous rotating transformation, which were controlled by PI regulators, several independent harmonic current loops constitute the complete current loop, so that the harmonic current inverting to the load harmonic component can be issued from the generator stator side. Finally, the simulation studies on a DFIG wind turbine system proves the feasibility of proposed control strategy.
Keywords: power system and its automation doubly-fed wind turbine harmonic management rotary coordinates
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