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arXiv 1806.02541eess.SYcs.SY
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PMU布局优化以实现智能电网可观测性及状态估计

PMU Placement Optimization for Smart Grid Obvervability and State Estimation

University of Technology Sydney(悉尼科技大学);King Fahd University of Petroleum and Minerals(法赫德国王石油与矿产大学);Queen’s University Belfast(贝尔法斯特女王大学);Princeton University(普林斯顿大学)

Y. Shi, H. D. Tuan, A. A. Nasir, T. Q. Duong, H. V. Poor

AI总结:

本文研究了在不同可观测程度下PMU布局对电网状态估计的影响,提出在可观测性约束下优化PMU布局以减少均方误差或最大化测量输出与电网状态间的互信息。

摘要:

本文研究了在不同可观测程度下PMU布局对电网状态估计的影响。可观测性程度是通过放置的PMU对节点可达性的深度来定义的,因此是PMU布局的重要特征。然而,许多现有工作中仅考虑可观测性仍无法保证良好的电网状态估计。一些现有工作也考虑了最小化均方误差或最大化测量输出与电网状态之间的互信息的PMU布局。然而,这些工作为了计算可行性而忽略了可观测性要求,从而可能导致人为结果,如接受未观测状态分量的估计值作为其无条件均值。在本文中,考虑在电网可观测性约束下优化PMU布局问题,通过最小化均方误差或最大化测量输出与电网状态之间的互信息来实现。所提供的解决方案避免了现有PMU布局设计中提到的基本缺陷。这些问题被提出为二进制非线性优化问题,本文为此开发了高效的计算算法。通过在大规模IEEE电力网络上的数值示例详细分析了所提出算法的性能。

英文摘要:

In this paper, phasor measurement unit (PMU) placement for power grid state estimation under different degrees of observability is studied. Observability degree is the depth of the buses' reachability by the placed PMUs and thus constitutes an important characteristic for PMU placement. However, the sole observability as addressed in many works still does not guarantee a good estimate for the grid state. Some existing works also considered the PMU placement for minimizing the mean squared error or maximizing the mutual information between the measurement output and grid state. However, they ignore the observability requirements for computational tractability and thus potentially lead to artificial results such as acceptance of the estimate for an unobserved state component as its unconditional mean. In this work, the PMU placement optimization problem is considered by minimizing the mean squared error or maximizing the mutual information between the measurement output and grid state, under grid observability constraints. The provided solution is free from the mentioned fundamental drawbacks in the existing PMU placement designs. The problems are posed as binary nonlinear optimization problems, for which this paper develops efficient algorithms for computational solutions. The performance of the proposed algorithms is analyzed in detail through numerical examples on large-scale IEEE power networks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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