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Stability Margin of DFIG Wind Turbines: Effects and Solutions

机译：DFIG风力发电机组的稳定裕度：影响和解决方案

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摘要

Doubly Fed Induction Generator (DFIG) based wind farms are one of the major contributors to wind power generation. Even though they possess advantages such as the capability of generating active power over an extended range of speed and the reduction of mechanical stresses in the turbine and the coupling, achieving maximum power extraction at high wind speeds while satisfying the present grid code requirements is a major issue. This is because the stability of the DFIG imposes a limitation on extracting maximum power at super synchronous speeds. An operating chart of the DFIG has been derived incorporating a steady state stability margin for safe operation. The PI limits of the active (P) and reactive (Q) power controllers have been derived by considering stator current, the rotor side converter power ratings and the stability margin of the generator. Studies also have been carried out to investigate what factors could be considered to improve the P and Q capability of the DFIG wind turbine.
机译：基于双馈感应发电机（DFIG）的风电场是风力发电的主要贡献者之一。尽管它们具有诸如在扩展的速度范围内产生有功功率的能力以及减小涡轮机和联轴器中的机械应力的优势等优点，但在满足当前电网规范要求的同时，在高风速下实现最大功率提取仍然是主要的问题。这是因为DFIG的稳定性对以超同步速度提取最大功率施加了限制。已导出DFIG的运行图，其中包含用于安全运行的稳态稳定性裕量。通过考虑定子电流，转子侧变流器额定功率和发电机的稳定性裕量，得出有功（P）和无功（Q）功率控制器的PI极限。还进行了研究，以研究可以考虑哪些因素来改善DFIG风力发电机的P和Q能力。

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