Fuzzy logic based optimal placement of voltage regulators and capacitors for distribution systems efficiency improvement

Abstract

Electric power systems in most developing countries, especially Ethiopia, are fed by radial distribution systems (RDSs), which serve as the final link between the high voltage transmission system and the consumers. In this paper, a fuzzy logic optimization method was presented for the efficient location of voltage regulators (VR) and capacitors in distribution systems (DSs). An investigation of Gondar power distribution system was performed specifically at the Gondar feeder in Gondar, Ethiopia which has 60 nodes with a total capacity of 3.413 MW. The Gondar distribution system (DS) is classified into different zones for the purpose of proper operation and supply of electricity. The minimum bus voltage is 0.8515 p.u., while the active and reactive power losses of the feeder are 377.75kW and 222.51 KVAR respectively. Voltages and power loss (PL) indices of the DS nodes were modeled using fuzzy membership functions. A fuzzy expert system (FES) containing a set of heuristic rules was used to determine the voltage regulator (VR) and capacitor placement suitability index. The load flow analysis of the system was simulated using NEPLAN MATLAB software before and after recompense. The effectiveness of the results obtained from both the voltage regulator and capacitor placement optimality using the proposed method are presented and compared.

Towards the Optimal Performance of Washing Machines Using Fuzzy Logic

“…is section presents a comparison of the proposed fuzzy logic control algorithm with related research papers. In this research work, the WT is reduced by a maximum of 9.26 minutes as compared with other studies in [2,[12][13][14][15] with a fewer number of rules. Also, other factors like a number of rules, WT, MF, and LI and outputs (LO) are compared with other research papers as presented in Table 1.…”

“…e defuzzification method cannot be chosen methodically contingent upon the applications. It depends on the need for the application [13].…”

Simultaneous network reconfiguration and capacitor allocations using a novel dingo optimization algorithm

“…The utilization of the grey wolf, dragonfly, and moth-flame optimization approaches for the ideal capacitor placements in a variety of distribution networks was given in [20]. Addisu et al [21] proposed a fuzzy logic optimization strategy for efficient voltage regulator positioning and capacitors in distribution systems. The method was tested on the practical Ethiopian Gondar power distribution system, which has 60 nodes.…”

Geographical information system based optimal path routing of distribution networks

“…In comparison to the generation and transmission systems, the distribution system has a far greater range of voltage levels, components, loads, and interconnections [ 2 , 3 , 4 , 5 , 6 ]. With respect to generation and transmission, Ethiopia's current distribution system needs improvement [ 7 , 8 , 9 ]. The main problem that electric power utilities in developing countries face today is that power consumption is high, yet supply expansion is hampered by limited resources, environmental concerns, and other societal considerations.…”