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Abstract

This letter is an enhancement to our previous paper that quantifies additional reinforcement costs (ARCs) for low voltage (LV) assets under moderate degree of 3-phase imbalance. The original formulas cause an overestimation of the ARCs under severe imbalance. This letter first quantifies the threshold of the severe degree of imbalance (DIB), below which the original formulas are applicable. Then, the ARC formulas are extended to account for the whole range of DIB. Case studies demonstrate that when the asset loading level is below 33.3% (50%) for a feeder (a transformer), the DIB never exceeds the threshold and the original ARC formulas are applicable; otherwise, the DIB can exceed the threshold and the extended formulas yield correct ARCs.
Original languageEnglish
Article number7769197
Pages (from-to)4143-4144
Number of pages2
JournalIEEE Transactions on Power Systems
Volume32
Issue number5
Early online date5 Dec 2016
DOIs
Publication statusPublished - 1 Sep 2017

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