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Guaranteed Phase & Topology Identification in Three Phase Distribution Grids

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Document pages: 8 pages

Abstract: We present a method for joint phase identification and topology recovery inunbalanced three phase radial networks using only voltage measurements. Byrecovering phases and topology jointly, we utilize all three phase voltagemeasurements and can handle networks where some buses have a subset of threephases. Our method is theoretically justified by a novel linearized formulationof unbalanced three phase power flow and makes precisely defined and reasonableassumptions on line impedances and load statistics. We validate our method onthree IEEE test networks simulated under realistic conditions in OpenDSS,comparing our performance to the state of the art. In addition to providing anew method for phase and topology recovery, our intuitively structuredlinearized model will provide a foundation for future work in this and otherapplications.

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