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Effects of operational limits of DFIG wind turbines on long-term voltage stability studies

机译：DFIG风力发电机组的运行极限对长期电压稳定性研究的影响

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This paper investigates the effects of doubly fed induction generators (DFIGs) operational limits on long-term voltage stability. DFIG operational limits are defined based on wind generator's capability curve in terms of the actual terminal voltage and wind speed. Also, the limitations of the converter, machine and wind turbine are considered in DFIG control schemes. The evolution of different variables is examined using two models for DFIG operational limits: fixed limits and variable limits. Time domain simulations have been performed in three different cases: constant wind speed, ramp up event, and ramp down event. This study also considers the dynamic models of over excitation limiter (OEL) and on-load tap changers (OLTC) combined with static and dynamic loads. Some important conclusions can be extracted from the simulation results, which can help in choosing the appropriate model to represent the DFIG operational limits in long-term voltage stability studies. (C) 2016 Elsevier B.V. All rights reserved.
机译：本文研究了双馈感应发电机（DFIG）的运行极限对长期电压稳定性的影响。根据风力发电机的能力曲线，根据实际端子电压和风速来定义DFIG的运行极限。同样，在DFIG控制方案中考虑了转换器，机器和风力涡轮机的局限性。使用DFIG操作极限的两个模型检查不同变量的演变：固定极限和可变极限。在三种不同情况下执行时域仿真：恒定风速，加速事件和减速事件。本研究还考虑了过励磁限制器（OEL）和有载分接开关（OLTC）结合静态和动态负载的动态模型。可以从仿真结果中提取一些重要的结论，这些结论可以帮助选择合适的模型来代表长期电压稳定性研究中的DFIG操作极限。 （C）2016 Elsevier B.V.保留所有权利。

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