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• W2890502174 abstract "There is an increasing need for monitoring and controlling uncertainties brought by distributed energy resources in distribution grids. For such goal, accurate multi-phase topology is the basis for correlating measurements in unbalanced distribution networks. Unfortunately, such topology knowledge is often unavailable due to limited investment, especially for revv{low-voltage} distribution grids. Also, the bus phase labeling information is inaccurate due to human errors or outdated records. For this challenge, this paper utilizes smart meter data for an information-theoretic approach to learn the topology of distribution grids. Specifically, multi-phase unbalanced systems are converted into symmetrical components, namely positive, negative, and zero sequences. Then, this paper proves that the Chow-Liu algorithm finds the topology by utilizing power flow equations and the conditional independence relationships implied by the radial multi-phase structure of distribution grids with the presence of incorrect bus phase labels. At last, by utilizing Carson's equation, this paper proves that the bus phase connection can be correctly identified using voltage measurements. For validation, IEEE systems are simulated using three real data sets. The simulation results demonstrate that the algorithm is highly accurate for finding multi-phase topology even with strong load unbalancing condition and DERs. This ensures close monitoring and controlling DERs in distribution grids." @default.
• W2890502174 created "2018-09-27" @default.
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• W2890502174 date "2018-09-18" @default.
• W2890502174 modified "2023-10-05" @default.
• W2890502174 title "Unbalanced Multi-Phase Distribution Grid Topology Estimation and Bus Phase Identification" @default.
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• W2890502174 doi "https://doi.org/10.48550/arxiv.1809.07192" @default.
• W2890502174 hasPublicationYear "2018" @default.
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