Distribution Network Equivalents Based on User-Defined Distributed Photovoltaic Equivalent Models

Abstract

To study the impact of distributed photovoltaics on the system’s operating characteristics, a large number of photovoltaic nodes have been added to the simulation, which significantly increases the simulation time. Equating the distribution network containing distributed photovoltaics is necessary to improve the simulation efficiency. However, the simulation system is mainly a stand-alone photovoltaic model, and the equivalent model is missing. For the above issues, this paper proposes a modeling and equivalence method of distribution network with distributed photovoltaic based on PSASP. Firstly, the equivalent structure of the distribution network with distributed photovoltaic is constructed, and the equivalence difficulties of distributed photovoltaic are analyzed. Then, a user-defined stand-alone model of distributed photovoltaic is established using user-defined modeling. Then build an equivalent model of distributed photovoltaic through parameter expansion; Finally, the equivalent model control parameters are obtained by the Particle Swarm optimization (PSO) algorithm. Simulation results based on PSASP show that the system response characteristics before and after the equivalence are better suited using the user-defined model and the equivalence method created in this paper than the existing model.