POWER DISTRIBUTION SYSTEM LOSS MINIMIZATION AND VOLTAGE PROFILE IMPROVEMENT USING HARRIS HAWKS OPTIMIZATION TECHNIQUES (CASE STUDY: DEBRE BERHAN POWER DISTRIBUTION SYSTEM

Abstract

Growing concerns over environmental impacts, conditions for improvement of the whole distribution network, shortage and expensiveness of fossil fuel, the deficiency in generating capacities, and ever-increasing demand for electricity have set the way towards distributed generation (DG) units in commercial and domestic electrical power systems. The major problems of distribution systems, such as load growth, power outage, overloaded lines, quality of supply, and reliability can be solved by optimally placing distributed gener ation near to the customer side. However, the non-optimal placement and size of DG units may lead to high power losses and bad voltage profiles on the power network. This thesis paper aims to minimize system real and reactive power losses, cost and improve the voltage profile of the system by determining the optimal size and penetration of wind based distributed generation using Harris hawks optimization. The results of base case load flow analysis showed that the case study distribution network feeder has a base case active and reactive power loss of 1629.04KW and 609.513KVAr respectively. The feeder minimum bus voltage and total voltage drop index at the base case is 0.8497V and 0.4407 respectively. The propossed HHO determines the optimal location and size of DG based on minimum loss reduction index, voltage deviation index, and the cost of DG at the same time to use the existing distribution network in an optimal manner. The optimal location of DG is determined to be 33 and 38 with a size of 2.4997MW and 2.4896MW respectively. The active and reactive power loss reduced to 290.097KW and 254KVAr after the DG integration. The method is implemented and tested on the Sheno feeder of the Debre Berhan power distribution system