Renewable and energy storage resources for enhancing transient stability margins: A PDE-based nonlinear control strategy
Renewable and energy storage resources for enhancing transient stability margins: A PDE-based nonlinear control strategy
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DOI：
10.1016/j.ijepes.2019.105510
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发表时间：
2020-03
影响因子：
5.2
通讯作者：
Serhat Obuz;Muharrem Ayar;R. D. Trevizan;Cody Ruben;A. Bretas
中科院分区：
文献类型：
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作者：
Serhat Obuz;Muharrem Ayar;R. D. Trevizan;Cody Ruben;A. Bretas
在本文中，我们提出了一种基于偏微分方程（PDE）的鲁棒控制策略，可以优化控制分布式储能系统和光伏电站，以提高同步发电机的稳定性裕度。从每个本地电源注入或吸收的功率量由协调层确定，协调层是通过解决约束优化问题来实现的，该问题通过拉格朗日松弛最小化控制器操作的成本。所提出的非线性控制器对于未知的时变延迟和测量的不确定性具有鲁棒性。开发了一种时滞补偿技术，将无时滞控制信号注入闭环系统。基于李亚普诺夫的稳定性分析表明，所有跟踪误差信号都是全局一致最终有界的。所提出的方法在 IEEE 39 总线测试系统上实施，以证明所提出的控制框架在遭受大干扰后恢复系统稳定性方面的成功。
In this paper, we present a robust Partial Differential Equation-based (PDE) control strategy, which can optimally control both distributed energy storage systems and photovoltaic power plants to enhance the stability margins of synchronous generators. The amount of power that is injected or absorbed from each local power source is determined by a coordination layer, which is implemented by solving a constrained optimization problem that minimizes the cost of the controller action by Lagrangian relaxation. The presented nonlinear controller is robust to unknown time-varying delay and uncertainties on measurements. A time delay compensation technique is developed to inject delay-free control signal into the closed-loop system. Lyapunov-based stability analysis shows that all tracking error signals are globally uniformly ultimately bounded. The proposed method is implemented on IEEE 39-Bus Test System to demonstrate the success of proposed control framework in restoring system stability after being subjected to a large disturbance.