Abstract:
This thesis presents an analysis of plant availability of large scale 1 MW PV rooftop power plant by using PVsyst simulation program and the actual installation information and data of a 1 MW PV power plant in Mae Klong district, Samutsongkram province using PV crystalline module. Analysis of monitored data will be used as supplementary information to evaluate the performance ratio and plant availability of the PV rooftop power plants.
The study used actual monitored data and power generation in year 2017 and 2018. The comparison analysis was investigated by using actual data and PVsyst simulation program. Analysis of important parameters were also included such as the effect of changes in ambient temperature, performance ratio (PR), Intensity of irradiation, plant availability factors (PAF), and the electric power production, respectively. The results showed that the total production capacity obtained from the PVsyst simulation program was 1,452,004 kWh, which was higher than the actual capacity in year 2017 and 2018 at 1,450,036 kWh and 1,412,652 kWh. The real total production capacity was less than simulation results at -0.13% and -2.7%, respectively.
This result caused by an indirect effect of the ambient temperature from the actual measured values which increased by 1.61% and 1.85%, respectively. This effect of temperature was also influenced the reduction of performance ratio (PR) at 0.02% and 2.08%. While the Plant Availability Factor (PAF) in year 2017 and 2018 was 100% and 99.97%. The low PAF value of 99.97% happened in August 2018 because the power plant was unable to connect to PEA grid due to a problem of grid failure. Therefore, it is necessary to consider the impact of PR and PAF for future production capacity of the power plant.