Frequency Stability Using MPC-Based Inverter Power Control in Low-Inertia Power Systems
Frequency Stability Using MPC-Based Inverter Power Control in Low-Inertia Power Systems
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DOI：
10.1109/tpwrs.2020.3019998
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发表时间：
2019-09
影响因子：
6.6
通讯作者：
Atinuke Ademola-Idowu;Baosen Zhang
中科院分区：
文献类型：
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作者：
Atinuke Ademola-Idowu;Baosen Zhang
电网正在从主要由同步电机组成的网络发展为同步电机和基于逆变器的资源（如风能，太阳能和储能）的混合。这种转变导致机械惯性的降低，这就需要新的资源通过其逆变器接口提供频率响应。在本文中，我们提出了一种新的战略模型预测控制的基础上，以确定最佳的有功功率设定点的逆变器在系统中的干扰事件。我们的框架明确考虑了功率和能量的硬约束，并且通过使用观察器来实时估计模型失配，我们证明了它对测量噪声，有限通信和延迟具有鲁棒性。我们证明了所提出的控制器显着优于一个最佳调整的虚拟同步机在一个标准的39总线系统在许多情况下。反过来，这意味着优化的逆变器为基础的资源可以提供更好的频率响应相比，传统的同步机。
The electrical grid is evolving from a network consisting of mostly synchronous machines to a mixture of synchronous machines, and inverter-based resources such as wind, solar, and energy storage. This transformation has led to a decrease in mechanical inertia, which necessitate a need for the new resources to provide frequency responses through their inverter interfaces. In this paper we proposed a new strategy based on model predictive control to determine the optimal active-power set-point for inverters in the event of a disturbance in the system. Our framework explicitly takes the hard constraints in power, and energy into account, and we show that it is robust to measurement noise, limited communications, and delay by using an observer to estimate the model mismatches in real-time. We demonstrate the proposed controller significantly outperforms an optimally tuned virtual synchronous machine on a standard 39-bus system under a number of scenarios. In turn, this implies optimized inverter-based resources can provide better frequency responses compared to conventional synchronous machines.