Exact Optimal Power Dispatch in Unbalanced Distribution Systems With High PV Penetration
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Effective computational strategies are proposed to allow the application of predictor-corrector primal-dual interior point method to solve optimization problems in real-time with a large number of constraints and variables, including discrete variables corresponding to switched capacitors and voltage regulators.Abstract:
Smart inverters provide additional control capability to help optimize the operation of distribution systems This paper proposes a framework for exact optimal active and reactive power dispatch of distributed photovoltaic (PV) generation, switched capacitors, and voltage regulators in large multi-phase unbalanced distribution systems The objectives of the optimal dispatch are minimization of the energy loss, PV active power curtailment, and operations of capacitors and voltage regulators, in addition to elimination of voltage violations and reverse power flow The optimization problem is formulated in rectangular coordinates as a nonlinear, nonconvex problem Effective computational strategies are proposed to allow the application of predictor-corrector primal-dual interior point method to solve optimization problems in real-time with a large number of constraints and variables, including discrete variables corresponding to switched capacitors and voltage regulators The accuracy of the numerical solution and the ability to implement the proposed framework are validated using the unbalanced multi-phase IEEE 34-bus and EPRI 2,998-bus distribution systems with 15-minute load and PV data The results show a significant loss reduction and elimination of both voltage violations and reverse power flowread more
Citations
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References
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On the Implementation of a Primal-Dual Interior Point Method
TL;DR: A Taylor polynomial of second order is used to approximate a primal-dual trajectory and an adaptive heuristic for estimating the centering parameter is given, which treats primal and dual problems symmetrically.
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Coordinated Active Power Curtailment of Grid Connected PV Inverters for Overvoltage Prevention
TL;DR: In this paper, the authors discuss the use of droop-based active power curtailment techniques for overvoltage prevention in radial LV feeders as a means for increasing the installed PV capacity and energy yield.
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Voltage rise: the big issue when connecting embedded generation to long 11 kV overhead lines
TL;DR: In this paper, the authors summarized the results of some generic studies, explaining the voltage rise issue and how it may be overcome, and proposed methods to counteract voltage rise are primary substation voltage reduction, reactive power import, autotransformers installation, conductor upgrading, and generation constraints.
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An interior-point method for nonlinear optimal power flow using voltage rectangular coordinates
G.L. Torres,V.H. Quintana +1 more
TL;DR: In this article, the authors describe the solution of an optimal power flow (OPF) problem in rectangular form by an interior-point method (IPM) for nonlinear programming.