A QCQP Approach for OPF in Multiphase Radial Networks with Wye and Delta Connections: Preprint

Emiliano Dall-Anese, Ahmed Zamzam, Nicholas Sidiropoulos, Changhong Zhao

Research output: Contribution to conferencePaper

Abstract

This paper examines the AC Optimal Power Flow (OPF) problem for multiphase distribution networks featuring renewable energy resources (RESs). We start by outlining a power flow model for radial multiphase systems that accommodates wye-connected and delta-connected RESs and non-controllable energy assets. We then formalize an AC OPF problem that accounts for both types of connections. Similar to various AC OPF renditions, the resultant problem is a non convex quadratically-constrained quadratic program. However, the so-called Feasible Point Pursuit-Successive Convex Approximation algorithm is leveraged to obtain a feasible and yet locally-optimal solution. The merits of the proposed solution approach are demonstrated using two unbalanced multiphase distribution feeders with both wye and delta connections.
Original languageAmerican English
Number of pages10
StatePublished - 2017
EventIREP 2017 Symposium - Espinho, Portugal
Duration: 27 Aug 20171 Sep 2017

Conference

ConferenceIREP 2017 Symposium
CityEspinho, Portugal
Period27/08/171/09/17

NREL Publication Number

  • NREL/CP-5D00-68605

Keywords

  • distributed energy resources
  • optimal power flow
  • QCQP
  • successive convex approximation

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