Loadability Improvement in Distribution Network using DG Units by Application of Biogeography Based Optimization Algorithm Considering Cable Aging Constraint

Abstract

Erosion of equipment in power systems mainly cable aging play an important role in reliability of power system, especially in distribution network. Cable aging mostly happens due to metallic structure of power equipment such as cable sheathing erosion. Decreasing reliability of the system and higher risk of failure are some results of cable aging. One of the best way to mitigate the impact of this issue, is reduction of cable current flow by installing Distributed Generations (DGs) in power system. In this paper Biogeography Based Optimization (BBO) algorithm is used to improve voltage profile of the network considering cable aging constraint by optimal siting and sizing of DGs. The IEEE 33-bus standard network is used as the test system and load flow calculations are carried out by Backward/Forward sweep in this work. Three scenarios are investigated and the BBO algorithm is run in 500 iterations for each scenario. The results show the suitability of BBO for this problem in aspect of convergence and finding global optimum value.