NDLI: Alternative approaches to consider DC-power flow with losses in a linear program for short term hydrothermal scheduling

Content Provider	IEEE Xplore Digital Library
Author	Santos, T.N. Diniz, A.L.
Copyright Year	2012
Description	Author affiliation: CEPEL - Brazilian Electrical Power Research Center, UERJ - Rio de Janeiro State University and UFRJ Federal University of Rio de Janeiro, Brazil (Santos, T.N.; Diniz, A.L.)
Abstract	This paper discusses alternative ways of representing line flow limits constraints and linear approximations for transmission line losses in the short term hydrothermal scheduling problem with a dc model of the electrical network. In the first approach, applied previously by the authors, participation factors for the generations are employed, where in the second approach, proposed in this paper, phase shift angles are represented directly as additional variables of the optimization problem. Although the proposed approach leads to a much higher number of variables for the optimization problem, the sparsity of the line flow and transmission losses expressions as a function of phase angles yields a much smaller number of non-null matrix elements. Numerical results are presented both for an IEEE-118 bus study case and the real Brazilian system with over 4600 buses and 6600 lines, where we show the drastic reduction in CPU time and memory allocation provided by the proposed approach.
Starting Page	1
Ending Page	6
File Size	394467
Page Count	6
File Format	PDF
ISBN	9781467326728
e-ISBN	9781467326735
DOI	10.1109/TDC-LA.2012.6319113
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-09-03
Publisher Place	Uruguay
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Linear systems DC optimal power flow Power transmission lines transmission losses Linear approximation Propagation losses Power generation dispatch linear programming Mathematical model Optimization
Content Type	Text
Resource Type	Article

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