Real power-system economic dispatch using a variable weights linear programming method

  • Mostefa Rahli University of Sciences and technology Mohamed Boudiaf of Oran BP 1505, Oran El M'naouer
  • L. Benasla University of Sciences and technology Mohamed Boudiaf of Oran BP 1505, Oran El M'naouer
  • A. Belmadani University of Sciences and technology Mohamed Boudiaf of Oran BP 1505, Oran El M'naouer
  • L. Abdelhakem-Koridak University of Sciences and technology Mohamed Boudiaf of Oran BP 1505, Oran El M'naouer

Abstract

This paper presents an ecient method to solve an economic load dispatch problem with load flow type network securityconstraints: the active generation limits and line active power flows limits. A new form of linear programming methodis proposed: a variable weights linear programming. The nonlinear dispatch problem is transformed into a linearone through variable weights linear programming. To achieve good linear, representation the nonlinear cost functionsbetween the active generation limits are approximated by the sum of products of cost values multiplied by the variableweights. The nonlinear equality network constraint containing the losses expressed by the specially formulated andcalculated function of generated powers is transformed into a linear one, the same manner as above. The set of nonlinearinequality constraints on line active power flows is linearly expressed in terms of active bus generation powers withupper limits on the active power flow to each violating lines. The dispatch problem transformed this manner with orwithout solving the load flow problem is demonstrated that the proposed method has practical application for real-timecontrol/dispatch.

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Published
2014-11-29
How to Cite
RAHLI, Mostefa et al. Real power-system economic dispatch using a variable weights linear programming method. Journal of Power Technologies, [S.l.], v. 95, n. 1, p. 34--39, nov. 2014. ISSN 2083-4195. Available at: <https://papers.itc.pw.edu.pl/index.php/JPT/article/view/518>. Date accessed: 23 july 2021.
Section
Power Plant

Keywords

power systems, economic dispatching, load flow

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