Improved group search optimization method for solving CHPED in large scale power systems

•IGSO is proposed in order to improve searching ability of conventional GSO.•CHP economic dispatch problem is solved using IGSO.•Proposed method is applied to some benchmark test functions and test power systems.•Heat–power dependency, transmission loss, valve-point and prohibited zones are consider...

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Bibliographic Details
Published in:	Energy conversion and management Vol. 80; pp. 446 - 456
Main Authors:	Hagh, Mehrdad Tarafdar, Teimourzadeh, Saeed, Alipour, Manijeh, Aliasghary, Parinaz
Format:	Journal Article
Language:	English
Published:	Kidlington Elsevier Ltd 01-04-2014 Elsevier
Subjects:	Applied sciences Benchmarking Combined heat and power Combined heat and power (CHP) Economic dispatch Economics Energy Exact sciences and technology Group search optimization Mathematical models Non-convex optimization Optimization Prohibited operating zones Searching Transmission loss Group search optimization Combined heat and power (CHP) Non-convex optimization Economic dispatch Prohibited operating zones Improvement Optimization
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Summary:	•IGSO is proposed in order to improve searching ability of conventional GSO.•CHP economic dispatch problem is solved using IGSO.•Proposed method is applied to some benchmark test functions and test power systems.•Heat–power dependency, transmission loss, valve-point and prohibited zones are considered.•Comparative results confirm efficiency of the proposed IGSO. This paper presents an improved heuristic algorithm for solving combined heat and power economic dispatch (CHPED) problem in large scale power systems, by employing improved group search optimization (IGSO) method. The basic deficiency of the original GSO algorithm is the fact that, it gives a near optimal solution rather than an optimal one in a limited runtime period. In this paper, some modifications have been applied to the original GSO in order to improve its searching ability. In this work, a sinusoidal term is employed to consider the valve-point effects and Kron’s formula is used in order to consider the transmission losses. Moreover, prohibited operating zones of power-only units are considered. The effectiveness and accuracy of the proposed method for solving the non-linear and non-convex problems is validated by carrying out simulation studies on sample benchmark test cases and three large scale power systems. Numerical results indicate that proposed method has the better performance in comparison with original GSO and some recently published papers.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0196-8904 1879-2227
DOI:	10.1016/j.enconman.2014.01.051