Umudike Journal of Engineering and Technology

This paper proposes an improved analytical method with Particle Swarm Optimization (PSO) for optimal allocation of Power Electronic Based-Distribution Generation (PEB-DG) with harmonic consideration. The proposed method improved the conventional analytical method for optimal DG sizing without harmonic consideration by using a polynomial interpolating function that represents the relationship of the PEB-DG size and Total Harmonic Distortion Voltage (THDv). The interpolating function is used to estimate the appropriate DG size for buses in the IEEE 33-bus network that caused violation of the THDv limit of 5% as defined by IEEE standards. The PSO algorithm was developed and used to determine the optimal allocation for the DG with the objective to minimize the total active power loss of the network. The proposed method records the optimal size and location for the PEB-DG to be 639kW and bus 25 respectively with 19.1% reduction in active power loss and 5.46% improvement in average voltage profile when compared with the base case (without PEB-DG) system.