A Hypothesis Testing Approach for Topology Error Detection in Power Grids
A Hypothesis Testing Approach for Topology Error Detection in Power Grids
复制标题
电网拓扑错误检测的假设检验方法
DOI：
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复制
发表时间：
2016
影响因子：
10.6
通讯作者：
B. Gou
中科院分区：
文献类型：
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作者：
W. Wu;M. Cheng;B. Gou
当电网拓扑由于事件而改变并且状态估计器没有随着拓扑变化而更新时，被认为是拓扑错误。在本文中，我们开发了一种检测电网拓扑错误的新方法。该方法将测量数据视为非平稳高斯过程，探索底层过程的依赖结构。它通过测试非平稳高斯过程的均值向量是否为零的假设来检测错误，并且不依赖于标准加权最小二乘（WLS）状态估计算法的收敛性。它对于检测拓扑错误非常有效，在拓扑错误中可能会出现多个一致性错误，并且传统的状态估计算法可能无法收敛。仿真结果表明，该方法能够准确识别由拓扑错误引起的异常测量。
When the grid topology is changed due to incidents and the state estimator is not updated with the topological change, it is considered a topology error. In this paper, we develop a new method for detecting topology errors in power grids. The proposed method considers the measurement data as a nonstationary Gaussian process, explores the dependence structure of the underlying process. It detects errors by testing the hypothesis of whether the mean vector of a nonstationary Gaussian process is zero and does not rely on the convergence of the standard weighted least-squares (WLS) state estimation algorithm. It is very effective in detecting topology errors, in which multiple conforming errors may occur and the traditional state estimation algorithms may fail to converge. Simulation results show that it can accurately identify the abnormal measurements caused by the topology error.