Distributed frequency control in power grids under limited communication
Distributed frequency control in power grids under limited communication
复制标题
有限通信下电网分布式频率控制
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
E. Modiano
中科院分区：
文献类型：
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作者：
Marzieh Parandehgheibi;K. Turitsyn;E. Modiano
在本文中，我们分析了通信故障对最优分布式频率控制性能的影响。我们考虑一种基于一致性的控制方案，并表明当通信网络断开时，它不会收敛到最优解。我们提出一种新的控制方案，该方案利用电网动态来复制未从通信网络接收到的信息，并证明在任何单一通信链路故障下它都能实现最优解。此外，我们表明在多个通信链路故障的情况下，这种控制可降低成本。接下来，我们分析离散时间通信对分布式频率控制性能的影响。特别是，我们将表明随着两条消息之间时间间隔的增加，收敛时间会增加。我们提出一种利用电网动态的新算法，并通过仿真表明它显著改善了控制方案的收敛时间。
In this paper, we analyze the impact of communication failures on the performance of optimal distributed frequency control. We consider a consensus-based control scheme, and show that it does not converge to the optimal solution when the communication network is disconnected. We propose a new control scheme that uses the dynamics of power grid to replicate the information not received from the communication network, and prove that it achieves the optimal solution under any single communication link failure. In addition, we show that this control improves cost under multiple communication link failures. Next, we analyze the impact of discrete-time communication on the performance of distributed frequency control. In particular, we will show that the convergence time increases as the time interval between two messages increases. We propose a new algorithm that uses the dynamics of the power grid, and show through simulation that it improves the convergence time of the control scheme significantly.