Objectives: The purpose of this study is to analyze the performance of a one-megawatt photovoltaic power
plant in Arak-Iran, according to IEC-61724 standard, using data recorded over a year. The photovoltaic plant of Arak is
located at coordinates 34.0954° N and 49.7013° E. This power plant is the first-megawatt photovoltaic power plant in Iran
which two types of modules are used and it was constructed by the New Energy Agency and the Power Research Center
under the supervision of the Ministry of Energy in 2016. In this plant, a combination of monocrystal and polycrystalline
modules is used, and the annual output is 1756 MWh.
Methods: The combination of modules is based on the 1920 modules of 250 W of polycrystalline and 260 modules of 260
W of monocrystal in the construction of the power plant. There are also 4 inverters and a 1250 KVA dry power transformer. The plant has suitable productivity, with a performance ratio equal to 0.8 and a final yield of 4.57.
Results: Ultimately the PV plant is simulated by PVsyst and the results are compared with monitored records which indicated the appropriate accuracy of the collected data. The calculated performance ratio for the power plant by PVsyst is
81.2% and has a 1.5% difference with the monitored totals. The energy supplied during one year by the power plant is
1756 MWh, whereas the prediction of annual energy yield that entered to the grid is equal to 1757 MWh.