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Smoothing of Wind Power Fluctuations for Permanent Magnet Synchronous Generator-Based Wind Energy Conversion System and Fault Ride-through Consideration

机译：基于永磁同步发电机的风能转换系统风电波动的平滑和故障穿越的考虑

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摘要

Due to the increment of penetration level of wind power generation, output power fluctuation is one of the most important issue's that can destabilize the power system operation. This article mainly deals with the smoothing of the output power fluctuations of a wind energy conversion system based permanent magnet synchronous generator and fault ride-through enhancement during a grid fault. The concerned wind energy conversion system based permanent magnet synchronous generator adopts an AC-DC-AC converter system. The proposed control method limits the wind energy conversion system output power by adjusting the pitch angle of the wind turbine blades when wind speed is above the rated wind speed. In the grid-side converter, a fuzzy logic controller is used to determine the torque reference for which the kinetic energy stored by the inertia of wind turbine can smooth the output power fluctuations of the permanent magnet synchronous generator. Also, the DC-link voltage, controlled by the grid-side inverter, is adjusted in accordance with the output power fluctuations of the permanent magnet synchronous generator using a voltage smoothing index. Moreover, in this aticle, the proposed method ensures that the wind turbine stays operational during grid faults and provides fast restoration once the fault is cleared. To show the effectiveness of the proposed method, simulations under different conditions have been performed by using MATLAB/Simulink~® (The Math Works, Natick, MA, USA).
机译：由于风力发电渗透水平的增加，输出功率波动是最重要的问题之一，它会破坏电力系统的运行。本文主要探讨基于风能转换系统的永磁同步发电机输出功率波动的平滑和电网故障期间故障穿越的增强。基于风能转换系统的永磁同步发电机采用AC-DC-AC转换系统。当风速高于额定风速时，所提出的控制方法通过调整风力涡轮机叶片的俯仰角来限制风能转换系统的输出功率。在电网侧变流器中，使用模糊逻辑控制器来确定转矩参考值，风力发电机的惯性所存储的动能可为该转矩参考值平缓永磁同步发电机的输出功率波动。而且，由电网侧逆变器控制的直流母线电压根据永磁同步发电机的输出功率波动使用电压平滑指数进行调整。此外，在该方面，所提出的方法可确保风力涡轮机在电网故障期间保持运转，并在故障清除后提供快速恢复。为了证明所提出方法的有效性，已经通过使用MATLAB /Simulink®（The Math Works，Natick，MA，USA）在不同条件下进行了仿真。

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