Distribution network reconfiguration considering DGs using a hybrid CS-GWO algorithm for power loss minimization and voltage profile enhancement

Abstract

This paper presents an implementation of the hybrid Cuckoo search and Grey wolf (CS-GWO) optimization algorithm for solving the problem of distribution network reconfiguration (DNR) and optimal location and sizing of distributed generations (DGs) simultaneously in radial distribution systems (RDSs). This algorithm is being used significantly to minimize the system power loss, voltage deviation at load buses and improve the voltage profile. When solving the high-dimensional datasets optimization problem using the GWO algorithm, it simply falls into an optimum local region. To enhance and strengthen the GWO algorithm searchability, CS algorithm is integrated to update the best three candidate solutions. This hybrid CS-GWO algorithm has a more substantial search capability to simultaneously find optimal candidate solutions for problems. The obtained test results for the 33-bus system show that minimization of active power loss was enhanced by 74.73%,73.35%, and 80.37% for light, nominal, and heavy load conditions, respectively, and similarly for 69-bus system is 81.50%, 84.74%, and 88.86%. The minimum voltage value for 33-bus system under nominal load condition was enhanced from 0.9130 p.u to 0.9865 p.u and similarly for the 69-bus system is 0.9094 p.u to 0.9842 p.u. Respectively. Furthermore, to validate the effectiveness and performances of the proposed hybrid CS-GWO algorithm with existing methods is presented. This method is tested and evaluated for standard IEEE 33-bus and 69-bus RDSs by considering different scenarios. Finally, the comparative analysis shows that the proposed algorithm was more efficient in minimizing power losses and enhancing the voltage profile of the system.

Optimal Network Reconfiguration for Real Power Losses Reduction using Sparrow Search Algorithm

“…There are several optimal network reconfiguration approaches available in literature. Those that closely relate to the present study are reported in [3]- [8]. Just as it is the case in the present study, these works consider load variations.…”

Optimal Network Reconfiguration for Real Power Losses Reduction using Sparrow Search Algorithm

“…Table IV compares the performance of the developed SSAbased approach against approaches based on Grasshopper Optimization Algorithm (GOA) [6], Hybrid Cuckoo Search-Grey Wolf Optimization algorithm (CSA-GWO) [3] and the Modified Sequential Switch Opening and Exchange (MSSSOE) [7] method. It can be noted from Table IV that, for both nominal (100%) and heavy (160%) load conditions, the developed SSA-based approach outperformed GOA, CSA-GWO, and MSSOE based approaches in terms of total power losses (both real and reactive) reduction and the improvement in bus voltages.…”

“…Kaberere 1 and G.K. Irungu 2 are with the Department of Electrical and Electronic Engineering, Jomo Kenyatta University of Agriculture and Technology (JKUAT), Nairobi, Kenya (e-mail 1 : kkanuthu@eng.jkuat.ac.ke; email 2 : girungu@jkuat.ac.ke). distribution systems' network reconfiguration is one way through which the bus voltages may be improved and the power system losses minimized [3].…”

“…Just as it is the case in the present study, these works consider load variations. In [3], Kumar and Rudramoorthy proposed and used an optimal network reconfiguration approach based on a hybrid of Cuckoo Search Algorithm and Grey Wolf Optimizer (CSA-GWO) to reconfigure the IEEE 33-, and 69-bus radial distribution systems. The reconfiguration was carried out to minimize the systems' total real power losses and bus voltage deviations.…”

Optimal Network Reconfiguration for Real Power Losses Reduction in the IEEE 33-Bus Radial Distribution System

“…Thomson P.M. Mtonga, Keren K. Kaberere and George K. Irungu O total real power losses. In [9], an optimal network reconfiguration approach based on a hybrid of Cuckoo Search Algorithm and Grey Wolf Optimizer (CSA-GWO) was proposed and used to reconfigure the IEEE 33-and 69-bus radial distribution systems. The reconfiguration was carried out with the aim of minimizing total real power losses and bus voltage deviations.…”