A Calculation Method for Efficiency Alternative Index of Photovoltaic Power Plant System

Abstract

The invention discloses a method for calculating a photovoltaic power station system efficiency substitute index, which includes the following five steps: 1. Screen out the effective power stations in the same area as the power station to be tested, and obtain at least one month's data of each effective power station; 2. Check whether the registered installed capacity of the selected effective power station is correct according to the historical maximum power of the screened out effective power station, and remove the incorrect power station. The correlation coefficient between the full power generation hours of the selected power station and the full power generation hours of the power station to be tested, and the power stations with the correlation coefficient less than 0.9 are excluded. According to the median of the number of full power generation hours, the substitute index of the system efficiency is calculated; the present invention obtains the substitute index of the system efficiency of the photovoltaic power station by calculating the data of the neighboring power stations, and realizes the performance close to the system efficiency at a low data acquisition cost. .

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a method for calculating a substitute index for efficiency of a photovoltaic power station system. Background technique [0002] System efficiency is the ultimate indicator of the operational performance of a photovoltaic power station. For a photovoltaic power station in operation, when the installed capacity and light irradiation are consistent, the higher the system efficiency, the higher the power generation and the greater the power station's revenue. [0003] At present, the calculation of the system efficiency of a photovoltaic power station depends on the local radiation data of the power station, and the acquisition cost of the radiation data is relatively high. The calculation of the system efficiency of a photovoltaic power station mainly relies on two aspects of data, 1. The meteorological data of the location of the photovoltaic power station, 2....

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Problems solved by technology

[0003] At present, the calculation of the system efficiency of a photovoltaic power station depends on the local radiation data of the power station, and the acquisition cost of the radiation data is relatively high. The calculation of the system efficiency of a photovoltaic power station mainly relies on two aspects of data, 1. The meteorological data of the location of the photovoltaic power station, 2. The efficiency of each equipment in a photovoltaic power station; in terms of existing technologies, the measurement and calculation of meteorological data mainly relies on the installation of small ground weather stations or conversion based on satellite data. The cost of installing small ground weather stations will be high, and satellite data will increase costs and have accuracy problems; measuring the efficiency of each equipment in a photovoltaic power station requires adding a large number of additional sensors, which will also increase the cost of the photovoltaic power station. The cost burden is unacceptable

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