Optimization of the connection conditions of a 2.4 MW Photovoltaic Power Plant on a quasi-charged medium voltage distributor

As the implementation of MW order photovoltaic power plants (PV) gathers a significant number of specialists, their connection to the medium voltage (MV) distributors involves problems related to the following aspects: determining the place and point of connection (distance from the electrical station busbars), the degree of the distributor charge in the context of the entire network related to the respective station, maintaining the voltage level within the range provided by the grid operator, the analysis of the PV connection in the extreme scenarios, related to the real load in the considered scheme, the voltage level to which the PV is connected. The above aspects have been considered and dealt with in this article for the purpose of connecting a 2.4 MW PV to an MV distributor with a high degree of charge due to the existing power plants or those with technical approval obtained for connection. Thus, after modeling the MV network and running the steady-state calculation program, its characteristic values have been checked if they are within the allowed value ranges in accordance with the performance standard. After determining the situation generated by coupling the PV to the grid and highlighting the negative aspects, several methods for optimizing the integration of the power injection point into the grid were proposed.