永磁同步风电系统网侧变换器控制策略研究

发布时间：2018-05-16 11:29

本文选题：风电系统 + 网侧变换器　；参考：《计算机仿真》2014年11期

【摘要】：永磁同步风电系统使用两电平电压型双PWM变换器向电网输送电能。由于变换器直流侧负载扰动引起直流母线电压波动,影响输入电网电能质量。为了减小负载扰动对直流母线电压的影响,提出一个基于相似反对称结构理论的网侧变换器控制方法。以相似反对称结构为闭环期望结构,采用逆推法设计网侧控制器。对系统在负载扰动作用下的稳定性进行分析。用Matlab进行仿真,结果表明该控制器能控制输入电网电能功率因数,提高直流母线电压的稳定性,缩短调节时间,提高系统的鲁棒性,为优化输电网的电能质量提供了依据。
[Abstract]:Permanent magnet synchronous wind power system uses two-level voltage-mode dual-PWM converter to transmit electricity to the power grid. The DC bus voltage fluctuation caused by DC side load disturbance affects the input power quality. In order to reduce the effect of load disturbance on DC bus voltage, a grid-side converter control method based on the theory of similar antisymmetric structure is proposed. The similar antisymmetric structure is used as the closed-loop desired structure, and the backstepping method is used to design the grid-side controller. The stability of the system under load disturbance is analyzed. The simulation results with Matlab show that the controller can control the input power factor, improve the stability of DC bus voltage, shorten the adjusting time, improve the robustness of the system, and provide the basis for optimizing the power quality of transmission network.
【作者单位】：四川大学电气信息学院;
【分类号】：TM614

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