Optimization of Capacitor Placement and Sizing in Radial Distribution Systems Using Enhanced Harmony Search Algorithm, PSO, and TLBO with Power Loss Index (PLI)

Given the significant contribution of the distribution network to the total system losses, it is essential to implement fundamental measures to reduce losses in the distribution network. The placement and optimal sizing of parallel capacitors to reduce power losses and improve voltage profiles is a common issue in power system design and control, which has been extensively studied. In this paper, the Enhanced Harmony Search Algorithm (IHA) is proposed to determine the optimal capacitor placement and sizing, utilizing the Power Loss Index (PLI) in radial distribution systems. The procedure begins by using the PLI to select the buses for optimal capacitor installation, followed by the development of the IHA to determine the optimal location and size of capacitors using PLI. The proposed method has been applied to the IEEE ۳۳-bus and ۶۹-bus radial distribution systems. The results of this algorithm are compared with those of the Particle Swarm Optimization (PSO) algorithm and the Teaching-Learning-Based Optimization (TLBO) algorithm to demonstrate its superiority. Additionally, the IHA is tested under different loading conditions, and the impact of this method on the results has been proven.

Keywords:

Enhanced Harmony Search Algorithm (IHA) , Radial Distribution Systems , Power Loss Index (PLI) , Optimal Capacitor Placement and Sizing , Particle Swarm Optimization (PSO) , TLBO