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Distributed Optimal Power Flow Algorithm for Radial Networks, I: Balanced Single Phase Case | IEEE Journals & Magazine | IEEE Xplore

Distributed Optimal Power Flow Algorithm for Radial Networks, I: Balanced Single Phase Case


Abstract:

The optimal power flow (OPF) problem determines a network operating point that minimizes a certain objective such as generation cost or power loss. Traditionally, OPF is ...Show More

Abstract:

The optimal power flow (OPF) problem determines a network operating point that minimizes a certain objective such as generation cost or power loss. Traditionally, OPF is solved in a centralized manner. With increasing penetration of renewable energy in distribution system, we need faster and distributed solutions for real-time feedback control. This is difficult due to the nonlinearity of the power flow equations. In this paper, we propose a solution for balanced radial networks. It exploits recent results that suggest solving for a globally optimal solution of OPF over a radial network through the second-order cone program relaxation. Our distributed algorithm is based on alternating direction method of multiplier (ADMM), but unlike standard ADMM-based distributed OPF algorithms that require solving optimization subproblems using iterative method, our decomposition allows us to derive closed form solutions for these subproblems, greatly speeding up each ADMM iteration. We illustrate the scalability of the proposed algorithm by simulating it on a real-world 2065-bus distribution network.
Published in: IEEE Transactions on Smart Grid ( Volume: 9, Issue: 1, January 2018)
Page(s): 111 - 121
Date of Publication: 11 April 2016

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