Behavior of photovoltaic systems connected to the distribution network. Case study, photovoltaic power plants in the distribution network of the SDEE Mures operator

摘要

Today, the stability of the power distribution system is influenced by the significant number of photovoltaic power plants connected to the electric distribution network. This paper aims to present the results obtained after about three years of operation of a photovoltaic plant of (2.5-3,2) MW in terms of voltage variation in the common point of connection, power quality. Also, will present results of photovoltaic power plant certification, environmental factors that contributed to the production of electricity, responsiveness to change in the scheme of operation of the electricity distribution network. The case study refers to a single 2.8 MW photovoltaic plant, but it will review the operation of two more plants 2,8 MW located in different geographical areas, but with the same power, type of inverters and photovoltaic panels from one supplier. The data obtained will be teaching material when designing and simulating the operation of a new photovoltaic power plant.