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Photovoltaic generation power output decrement rate measurement device and estimation method thereof

A technology of photovoltaic power generation and measurement devices, which is applied in the direction of measurement devices, electric power measurement and electricity measurement by applying digital technology, which can solve the problems affecting the practicability of the model and the difficulty of continuous measurement, and achieve the effect of improving the accuracy of the model

Inactive Publication Date: 2018-11-16
ZHANGJIAKOU POWER SUPPLY COMPANY OF STATE GRID JINBEI ELECTRIC POWER COMPANY +1
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Problems solved by technology

In actual engineering, it is difficult to measure the dust concentration of photovoltaic panels with the help of high-precision weighing equipment, which affects the practicability of the above model

Method used

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  • Photovoltaic generation power output decrement rate measurement device and estimation method thereof

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Embodiment Construction

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0037] see Figure 1-6 , on the basis of collecting a large number of actual sample data of 440nm aerosol optical depth cumulative value-1020nm aerosol optical thickness cumulative value-relative humidity cumulative value-photovoltaic power output reduction rate, the invention utilizes the harmonic neural network method to establish photovoltaic power generation A predictive model for the power output reduction rate, which is structured as figure 2 Shown, an...

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Abstract

The present invention provides a photovoltaic generation power output decrement rate measurement device and an estimation method thereof in a dust stratification condition. The device comprises a light generation device, a photometer, a photovoltaic cell panel, a maximum power tracking circuit and a maximum power tracking MCU, and can provide different illumination intensities and measure the maximum power of the photovoltaic cell panel so as to obtain a photovoltaic generation power output decrement rate in the dust stratification condition. The estimation method employs a harmonic neural network to establish a prediction model of the photovoltaic generation power output decrement rate and employs the model to perform estimation of the photovoltaic generation power output decrement rate in the dust stratification condition on the basis of construction of a lot of actual sample data of an aerosol optical depth aggregate value, a relative humidity aggregate value, the illumination intensities and the photovoltaic generation power output decrement rate. The photovoltaic generation power output decrement rate measurement device and the estimation method thereof can solve the problemsthat the photovoltaic cell panel dust stratification concentration is difficult to measure and the influence on the photovoltaic generation is difficult to perform quantitative analysis so as to facilitate improvement of the prediction precision of the photovoltaic generation.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power generation, in particular to a device for measuring the reduction rate of photovoltaic power output output and an estimation method thereof. Background technique [0002] At present, fossil energy is increasingly depleted and environmental problems are prominent. As an inexhaustible and inexhaustible clean energy, solar photovoltaic power generation has attracted the attention of all countries. Photovoltaic power prediction technology is of great significance to ensure the stable operation of the power system, but it still faces great challenges so far. [0003] The dust covering the surface of photovoltaic panels has a significant impact on the output power of photovoltaic panels. Existing studies have shown that dust accumulation can indirectly weaken the solar radiation absorbed by photovoltaic panels through the blocking effect and corrosion effect, thereby reducing its power gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36G01R21/133
CPCG01R21/133G01R31/36
Inventor 褚晓辉王建伟王晓明郭俊超吕晓宁张婧石健夫
Owner ZHANGJIAKOU POWER SUPPLY COMPANY OF STATE GRID JINBEI ELECTRIC POWER COMPANY
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