Contents
How do you calculate performance ratio?
Performance Ratio (PR) of a plant for a period of time is energy measured(kWh)/(Irradiance(kWh/m2) on the panel x Active area of PV module(m2) x PV module efficiency).
What is the range of performance ratio PR?
In real life, a value of 100 % cannot be achieved, as unavoidable losses always arise with the operation of the PV plant (e.g. thermal loss due to heating of the PV modules). High-performance PV plants can however reach a performance ratio of up to 80 %.
What is PR ratio in solar?
The performance ratio is a measure of the quality and performance of a PV plant which is independent of location thus often considered as a quality factor. The performance ratio (PR) is stated as percent and describes the relationship between the actual and theoretical energy outputs of the PV plant.
What are the 3 types of ratios?
The three main categories of ratios include profitability, leverage and liquidity ratios. Knowing the individual ratios in each category and the role they plan can help you make beneficial financial decisions concerning your future.
What is PR formula?
At first glance, the PR Factor is simple to calculate: PR = Yf / Yr. The comparison of PRs to one another with other PV plants is, however, not that simple. Various obstacles are described in the following: The calculation refers to nominal / reference energy yield Yr.
What is PR in Pvsyst?
The Performance Ratio is the ratio of the energy effectively produced (used), with respect to the energy which would be produced if the system was continuously working at its nominal STC efficiency. The PR is defined in the norm IEC EN 61724.
How does Pvsyst calculate PR?
PR = E_Grid / (GlobInc * Pnom) NB: The PR includes all the array losses mentioned on the Loss diagram (Shadings, IAM, Soiling, PV conversion, mismatch, wiring resistance, etc) and the system losses (inverter efficiency and AC losses in grid-connected, or storage/battery/unused losses in stand-alone, etc).
What are 2 types of ratios?
There are two “kinds” of ratios: “part to part” and “part to whole“.
What is difference between PR and CUF?
The worldwide standard for measuring a solar plant’s performance is the Performance Ratio (P.R.). However, most project developers, investors and EPC contractors in India use the Capacity Utilization Factor (C.U.F.) as the standard of measuring the performance of a plant.
What’s the difference between PR and Performance Index?
performance ratio (PR) is the ratio of measured output to expected output for a given reporting period based on the system name-plate rating. performance index is the ratio of measured output to expected output for a given reporting period based on a more detailed model of system performance than the performance ratio.
How to calculate the performance ratio ( PR ) for PV?
Then for a specified period, the PR (corr) is defined by the following equation: PR (corr) = E_Grid / ( PNomPV * Σ hours ( GlobInc / GRef * (1 – muPmpp * (Tarray – TArrayAver) ) Where : – GlobInc = incident irradiance in hourly values – GRef = 1000 W/m² – muPmpp = Pmpp temperature coefficient of the PV module
What does PR stand for in power plant?
One simple way to communicate the system performance is to use the performance ratio (PR): the ratio of the electricity generated to the electricity that would have been generated if the plant consistently converted sunlight to electricity at the level expected from the DC nameplate rating.
Which is the correct definition of performance ratio?
See also the previous page Normalzed Performance index. The Performance Ratio is the ratio of the energy effectively produced (used), with respect to the energy which would be produced if the system was continuously working at its nominal STC efficiency. The PR is defined in the norm IEC EN 61724.