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Photovoltaic power station dust blocking loss analysis method

A technology of photovoltaic power station and analysis method, applied in photovoltaic power generation, photovoltaic module, photovoltaic system monitoring and other directions, can solve the problems of inability to accurately reflect the loss of dust shielding, large errors, etc., achieve reasonable design, fast and accurate calculation, and improve enterprise income Effect

Active Publication Date: 2017-10-03
HUADIAN ELECTRIC POWER SCI INST CO LTD
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AI Technical Summary

Problems solved by technology

This analysis method has a large error and cannot accurately reflect the dust occlusion loss

Method used

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  • Photovoltaic power station dust blocking loss analysis method
  • Photovoltaic power station dust blocking loss analysis method
  • Photovoltaic power station dust blocking loss analysis method

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

[0024] Example.

[0025] see Figure 1 to Figure 2 .

[0026] This embodiment is a method for analyzing the dust occlusion loss of a photovoltaic power station.

[0027] There are two power generation strings in the test system, namely, the No. 11 photovoltaic DC channel of the No. 3 combiner box in the 18th district and the No. 13 photovoltaic DC channel of the No. 3 combiner box in the 18th district. The No. 11 photovoltaic DC channel of the No. 3 combiner box in the 18th district is the common string 2, and the No. 13 photovoltaic DC channel of the No. 3 combiner box in the 18th district is the cleaning string 3.

[0028] Select several days as the ash accumulation days. The No. 11 photovoltaic DC channel of t...

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Abstract

The invention relates to a photovoltaic power station dust blocking loss analysis method. The method sequentially comprises the steps that a plurality of days are selected to serve as dust accumulation days, dust accumulation is performed on a common string and a cleaning string in the dust accumulation days, and current data of the common string and current data of the cleaning string at the same moment in the dust accumulation days are recorded; a plurality of days are selected to serve as cleaning days, dust accumulation continues to be performed on the common string in the cleaning days, a cleaning robot cleans the cleaning string in the cleaning days, and current data of the common string and current data of the cleaning string at the same moment in the cleaning days are recorded; dust accumulation day moment deviations at all moments in the dust accumulation days are calculated; cleaning day moment deviations at all moments in the cleaning days are calculated; a dust accumulation day mean variation and a cleaning day mean variation are calculated respectively; and the cleaning day mean variation and the dust accumulation day mean variation are subtracted to obtain a dust blocking loss rate.

Description

technical field [0001] The invention relates to a method for analyzing the dust occlusion loss of a photovoltaic power station, which belongs to the field of photovoltaic power generation. Background technique [0002] At present, most of the large-scale photovoltaic power plants in my country are distributed in the northwest region, and the northwest region is an area with relatively serious sandstorms in my country, which also means that the northwest region is an area with relatively serious dustfall in our country. The impact of dust on the power generation of photovoltaic power plants has not yet attracted the attention of Chinese researchers. [0003] The western region of my country is the birthplace of dust storms in Asia, and the dustfall is very high, and my country's large-scale photovoltaic power plants are installed in the Gobi or desert with less vegetation, so the dustfall loss rate is conservatively estimated at more than 5%. The total dust loss of a ten-meg...

Claims

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Application Information

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IPC IPC(8): G06F19/00H02S50/15
CPCG16Z99/00H02S50/15Y02E10/50
Inventor 杨雨刘庆超张士龙魏超张骏
Owner HUADIAN ELECTRIC POWER SCI INST CO LTD
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