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Variable structure control approach for grid connected PMSG Wind Farm

机译：并网PMSG风电场变结构控制方法

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The study of a Wind Farm (WF) based on Permanent Magnet Synchronous Generator (PMSG) and interconnected to the electric network is presented. The 8 MW wind farm consists of 4 PMSGs based 2 MW generators connected to a common DC bus. Each generator is connected to the DC-bus with a rectifier while the DC-bus is connected to the grid through one DC/AC converter. The proposed control law combines Sliding Mode Variable Structure Control (SM-VSC) and Maximum Power Point Tracking (MPPT) control strategy to maximize the generated power from Wind Turbine Generators (WTGs). Moreover, considering the variation of wind speed, both converters used the SM-VSC scheme. The PMSGs side converters are used to achieve MPPT, while the grid-side converter regulates DC-link voltage and injects the generated power into the AC network. Accordingly, WF system not only can capture the maximum wind energy, but also can maintain the frequency and amplitude of the output voltage with unity power factor. The effectiveness of the control strategy is verified by simulation analyses using Matlab/ Simulink.
机译：提出了一种基于永磁同步发电机（PMSG）并与电网互连的风电场（WF）的研究。 8兆瓦的风电场由基于4个PMSG的2兆瓦发电机组成，它们连接到公共直流母线。每个发电机都通过整流器连接到DC总线，而DC总线通过一个DC / AC转换器连接到电网。拟议的控制法则结合了滑模可变结构控制（SM-VSC）和最大功率点跟踪（MPPT）控制策略，以最大程度地提高风力发电机（WTG）的发电量。此外，考虑到风速的变化，两个转换器都使用SM-VSC方案。 PMSGs侧转换器用于实现MPPT，而电网侧转换器则调节直流母线电压并将产生的功率注入AC网络。因此，WF系统不仅可以捕获最大的风能，而且可以以统一的功率因数保持输出电压的频率和幅度。通过使用Matlab / Simulink进行的仿真分析，验证了控制策略的有效性。

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