Solving network-constrained nonsmooth economic dispatch problems through a gradient-based approach

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dc.contributor.authorPinheiro, Ricardo B.N.M. [UNESP]
dc.contributor.authorBalbo, Antonio R. [UNESP]
dc.contributor.authorNepomuceno, Leonardo [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-06T16:31:34Z
dc.date.available2019-10-06T16:31:34Z
dc.date.issued2019-12-01
dc.description.abstractThe Network-Constrained Nonsmooth Economic Dispatch (NCNS-ED) is formulated as a nonsmooth, nonconvex and multimodal optimization problem. Nonsmoothness is generally associated with valve-point loading effects in the cost function of thermal units. Due to nonsmoothness, gradient-based approaches cannot be used directly for solving NCNS-ED problems. Hence, heuristic approaches have been used as the main methodologies for solving this problem. In this paper, we propose a reformulation for the NCNS-ED problem that enable its solution by means of gradient-based approaches. This formulation is based on the definition of an equivalent nonlinear programming problem where the modular terms are eliminated by using artificial variables and inequality constraints. We propose a primal–dual modified log-barrier function approach for solving the reformulated problem, where each inequality constraint is penalized by using a piecewise function that involves the modified barrier functions of Polyak and Jittortrum-Osborne-Meggido. Numerical results involving small-, medium- and large-scale power systems, have shown that the proposed reformulation enables eliminating nonsmoothness in the NCNS-ED problems. The method proposed, which is compared to some methods described the literature, has shown robustness for solving real large-scale NCNS-ED problems with acceptable computation times.en
dc.description.affiliationDepartment of Electrical Engineering Faculty of Engineering-FEB Unesp-Univ. Estadual Paulista
dc.description.affiliationDepartment of Mathematics Faculty of Sciences-FC Unesp-Univ. Estadual Paulista
dc.description.affiliationUnespDepartment of Electrical Engineering Faculty of Engineering-FEB Unesp-Univ. Estadual Paulista
dc.description.affiliationUnespDepartment of Mathematics Faculty of Sciences-FC Unesp-Univ. Estadual Paulista
dc.format.extent264-280
dc.identifierhttp://dx.doi.org/10.1016/j.ijepes.2019.05.046
dc.identifier.citationInternational Journal of Electrical Power and Energy Systems, v. 113, p. 264-280.
dc.identifier.doi10.1016/j.ijepes.2019.05.046
dc.identifier.issn0142-0615
dc.identifier.lattes2013445187247691
dc.identifier.scopus2-s2.0-85066071655
dc.identifier.urihttp://hdl.handle.net/11449/189156
dc.language.isoeng
dc.relation.ispartofInternational Journal of Electrical Power and Energy Systems
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectModified logarithm-barrier function methods
dc.subjectNonsmooth economic dispatch problem
dc.subjectNonsmooth optimal power flow
dc.titleSolving network-constrained nonsmooth economic dispatch problems through a gradient-based approachen
dc.typeArtigo
unesp.author.lattes2013445187247691
unesp.author.lattes0884799120343367[2]
unesp.author.orcid0000-0002-4512-0140[2]

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