Abstract In this paper, a non-linear generalized predictive control (NGPC) has been used for the stability analysis in a hybrid power system consisting of series and parallel compensators in the presence of wind farms. In this system, STATCOM has been used as a parallel compensator for improving reactive power of the wind farm, and HVDC is employed to improve damping of transmission line connected to the power system. The proposed method is based on two internal and external control loops. The internal control loop is used to apply the switching signals suitable for the rotor-side converter in DFIG, HVDC’s converter, and the STATCOM inverter. In the external control loop, a disturbance observer has been employed to estimate the aerodynamic torque and to control the wind turbine’s speed. The aim of designing the observer is to evaluate the robustness of the controller under the changes of internal parameters of the system. The simulations have been implemented in the MATLAB software in different scenarios on a large-scale power system with 16 machines and 68 buses.

中文翻译：

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基于非线性控制器的HVDC和STATCOM在风电场存在的情况下提高大型电力系统的稳定性

摘要 在本文中，非线性广义预测控制 (NGPC) 已被用于在存在风电场的情况下由串联和并联补偿器组成的混合动力系统的稳定性分析。在该系统中，STATCOM 被用作并联补偿器以提高风电场的无功功率，并采用 HVDC 来改善连接到电力系统的输电线路的阻尼。所提出的方法基于两个内部和外部控制回路。内部控制回路用于施加适用于双馈发电机转子侧变流器、HVDC 变流器和 STATCOM 逆变器的开关信号。在外部控制回路中，已采用扰动观测器来估计气动扭矩并控制风力涡轮机的速度。设计观测器的目的是评估控制器在系统内部参数变化下的鲁棒性。仿真已在 MATLAB 软件中在具有 16 台机器和 68 条总线的大型电力系统的不同场景中实现。