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Energy Function-Based Model Predictive Control With UPFCs for Relieving Power System Dynamic Current Violation

机译:UPFC的基于能量函数的模型预测控制,减轻了电力系统的动态电流干扰

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摘要

This paper suggests a novel dynamic protection/control scheme with unified power flow controller (UPFC) to prevent transmission system overload. A transient energy function (TEF)-based model predictive control (MPC) methodology is developed to reduce control cost and enhance power grid resilience. First, a TEF and an associated cost function of UPFCs are constructed based on ac dynamic model with transmission over-current tripping model. Then the derived control constraint for MPC exploits the non-positive time derivative of the TEF with the accommodated admittance, which are optimally regulated by UPFC inputs, to mitigate dynamic current violation based on sensitivity analysis. With the proposed control method, the system can be driven to a stable state without current violation even if part of the UPFCs fails. Finally, the simulation results of 14 bus test case and 118 bus test case demonstrate the effectiveness of our proposed method, as well as the advantage over conventional MPC method.
机译:本文提出了一种具有统一潮流控制器(UPFC)的新型动态保护/控制方案,以防止传输系统过载。开发了基于暂态能量函数(TEF)的模型预测控制(MPC)方法,以降低控制成本并增强电网的弹性。首先,基于交流动态模型和传输过电流跳闸模型,构造了UPF的TEF和相关的成本函数。然后,推导的MPC控制约束条件利用TEF的非正时导数和容纳的导纳(由UPFC输入进行最佳调节)来缓解基于灵敏度分析的动态电流冲突。利用提出的控制方法,即使部分UPFC发生故障,也可以将系统驱动到稳定状态而不会造成电流干扰。最后,通过14个总线测试用例和118个总线测试用例的仿真结果证明了我们提出的方法的有效性,以及与常规MPC方法相比的优势。

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