Effect of PV Plants Connected to the Electrical Distribution System on the Mains Voltage

With the Paris Climate Agreement, incentives and demand for distributed generation are increasing day by day to reduce the carbon footprint, increase sustainability, and fight energy crises. However, since the current structure of the EDS is designed to be a one-way energy flow, the traditional grid evolves into a completely different structure with the connection to the distributed generation system. It is known that at the point where the distributed generation is connected to the system, it can have positive contributions to the grid as well as negative contributions. In this study, the effects of the generation-consumption relationship in the integration of PV power plants on the voltage on busbars, lines and transformers between the substation and the end user are investigated. Load flow analysis is performed with MatlabSimulink for two different generation-consumption cases and voltage variations are analyzed within the limits specified in the standards. The results of the analysis show that with the correct integration of PV plants, the grid voltage increases from 30.89 kV to 31.5 kV, which is the nominal voltage level, while with incorrect integration, it increased to 32.56 kV, an increase above the standards.