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Unbalanced Three-Phase Optimal Power Flow for Smart Grids

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5 Author(s)
Bruno, S. ; Dept. of Electr. & Electron. Eng., Politec. di Bari, Bari, Italy ; Lamonaca, S. ; Rotondo, G. ; Stecchi, U.
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Advanced distribution management system (DMS), an evolution of supervisory control and data acquisition obtained by extending its working principles from transmission to distribution, is the brain of a smart grid. Advanced DMS assesses smart functions in the distribution system and is also responsible for assessing control functions such as reactive dispatch, voltage regulation, contingency analysis, capability maximization, or line switching. Optimal power flow (OPF)-based tools can be suitably adapted to the requirements of smart distribution network and be employed in an advanced DMS framework. In this paper, the authors present a methodology for unbalanced three-phase OPF (TOPF) for DMS in a smart grid. In the formulation of the TOPF, control variables of the optimization problem are actual active load demand and reactive power outputs of microgenerators. The TOPF is based on a quasi-Newton method and makes use of an open-source three-phase unbalanced distribution load flow. Test results are presented on the IEEE 123-bus Radial Distribution Feeder test case.

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Industrial Electronics, IEEE Transactions on  (Volume:58 ,  Issue: 10 )