The key parameters to decide Solar PV power plants



The key parameters to decide Solar PV power plants

 The Key parameter discussed during Solar PV power plant is Performance Ratio.
Performance ratio” gives insights how efficient the available solar energy is converted into electrical energy. It is possible to compare the performance of various plants at different locations on a normalized – independent from climate conditions – level over a long period of time. Deviations in the PR (e.g. values below the expected range) indicate a possible fault or problem in the solar PV plant. PR can therefore be understood as an early warning system.
PERFORMANCE RATIO(PR) of a plant for a period of Time = Energy measured(kWh)/(Irradiance(kWh/m2) on the panel x (Active area of PV module(m2)) x (PV module efficiency)
Many of the report speak about more on capacity utilisation factors(CUF).
Capacity Utilisation Factor(CUF) =Energy measured (kWh) / (365*24*installed capacity of the plant).
So on one side, PR is a measure for the performance of a PV system taking into account environmental factors (temperature, irradiation, etc.) and on the other side is CUF that completely ignores all these factors and also the de-rating or degradation of the panels.
 PR will take into account the availability of the grid, CUF will not.

PR will take into account the minimum level of irradiation needed to generate electrical energy, CUF will not.
PR will take into account irradiation levels at a given period of time, CUF will not
PR can be used as a tool to compare different solar PV systems with each other – even if they are located at different locations since all environmental factors will be taken into account. Therefore only the design and the ability of the system to convert solar energy into electrical energy will be compared with each other.
So The performance ratio(pr) is the key parameter to decide in Solar pv power plants.

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