Optimal Sizing of Distributed Photovoltaic Generation in a MV Network

This paper presents a methodology for the optimal location of photovoltaic distributed generation (DG) in balanced or unbalanced electric power distribution system. The performance evaluation of the network is developed using the Open Distribution Systems Simulator software (OpenDSS) while the cost optimization is carried out using MATLAB optimization toolbox. An International Council on Large Electric Systems (CIGRE) medium voltage (MV) distribution network model is used as a test-system for sizing and locating photovoltaic generation sites. The optimization formulation considers the installation cost minimization, in addition to complying with other operational constraints. The case study scenarios shown were developed using an algorithm based on an optimal analysis of the installation cost for a solar plant and the grid power required to supply the total demand of the system. The results showed that DGs contribute to the improvement of the system's performance, with particular enhancement of system's voltages.