Distribution networks with high penetration of distributed generation yield complicated and uncertain power flow, which makes most existing faulted line identification methods not adaptable for industrial applications. Driven by this motivation, a novel single-phase-to-ground (SPTG) faulted line identification method is proposed based on hybrid state estimator (HSE). The first step of the method is to present an HSE for power distribution networks using power flow measurements mixed phasor measurement units. Then, an SPTG fault on a power line is treated as an event that suddenly increases one virtual bus in the monitored network, so as to form the extended bus admittance matrix and augmented HSE based on the specific network topology. In this way, the faulted line identification could be obtained by computing parallel estimated results transversally. Robustness and effectiveness of the proposed HSE and the HSE-based SPTG faulted line identification method are validated by means of a cyber-physical system (a cosimulation platform), where two typical three-phase power distribution networks are considered to simulate with its hybrid measurement system.

中文翻译：

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通过混合状态估计器进行配电网络中的鲁棒故障线路识别


分布式发电渗透率高的配电网会产生复杂且不确定的潮流，这使得大多数现有的故障线路识别方法不适合工业应用。在此动机的驱动下，提出了一种基于混合状态估计器（HSE）的单相接地（SPTG）故障线路识别方法。该方法的第一步是使用潮流测量混合相量测量单元提出配电网络的 HSE。然后，将电力线上的SPTG故障视为在监控网络中突然增加一条虚拟母线的事件，从而形成基于特定网络拓扑的扩展母线导纳矩阵和增强HSE。这样，通过横向计算并行估计结果即可得到故障线路识别。通过信息物理系统（协同仿真平台）验证了所提出的 HSE 和基于 HSE 的 SPTG 故障线路识别方法的鲁棒性和有效性，其中考虑两个典型的三相配电网络并通过其混合测量进行仿真系统。