In this paper, a coordinated control scheme for wind turbine generator (WTG) and supercapacitor energy storage system (ESS) is proposed for temporary frequency supports. Inertial control is designed by using generator torque limit considering the security of WTG system, while ESS releases its energy to compensate the sudden active power deficit during the recovery process of turbine rotor. WTG is modeled using the fatigue, aerodynamic, structure, turbulence (FAST) code, which identifies the mechanical loadings of the turbine and addresses electro-mechanical interactions in the wind energy system. A damping controller is augmented to the inertial control to suppress severe mechanical oscillations in the shaft and tower of the turbine during frequency supports. Furthermore, the result of small-signal stability analysis shows that the WTG-ESS tends to improve the stability of the whole multi-energy power grid. The major contributions of this paper will be validated by utilizing the proposed control method that combines the grid support capability and maintaining the integrity of structural design of the turbine for normal operations.

中文翻译：

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具有增强惯性响应的风力发电机和储能系统的机电建模

本文提出了一种用于风力发电机（WTG）和超级电容器储能系统（ESS）的协调控制方案，用于临时频率支持。通过考虑WTG系统的安全性，通过使用发电机转矩极限来设计惯性控制，而ESS释放能量以补偿涡轮转子恢复过程中突然的有功功率不足。使用疲劳，空气动力学，结构，湍流（FAST）代码对WTG进行建模，该代码可识别涡轮的机械负载并解决风能系统中的机电相互作用。在惯性控制中增加了阻尼控制器，以抑制在频率支持期间涡轮轴和塔架中的严重机械振动。此外，小信号稳定性分析的结果表明，WTG-ESS倾向于提高整个多能源电网的稳定性。本文的主要贡献将通过利用所提出的控制方法进行验证，该控制方法结合了电网支撑能力并保持了正常运行时涡轮机结构设计的完整性。