期刊
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS
卷 79, 期 -, 页码 42-52出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijepes.2015.12.034
关键词
DG location and size; Imperialistic Competitive Algorithm (ICA); Voltage stability index; Voltage stability margin; Active power losses minimization; Cuckoo search
This paper proposes a new index to determine the optimal size and location of DG units, in order to minimize active power losses and enhance voltage stability margin considering load variations. A modified form of Imperialistic Competitive Algorithm (ICA) method is used to solve the optimization problem. To provide a comprehensive perspective for network scheduling, the load variations are considered. The load linear changes are from 50% to 150% of the base load (in 1% steps). At each step, the optimal size and location of the DG unit are determined and then, general expressions for DG sizes as a function of load level are concluded through curve fitting technique. These general expressions can be used as a suitable tool for network planning. The proposed method is applied to 34-bus and 69-bus test systems and the results are compared with the results obtained from cuckoo search algorithm in order to validate the proposed methodology. (C) 2015 Elsevier Ltd. All rights reserved.
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