Weed shading diagnosis and troubleshooting method for distributed photovoltaic power plants

A distributed photovoltaic and troubleshooting technology, applied in data processing applications, instruments, calculations, etc., can solve problems such as failure diagnosis and location, and achieve low economic input costs, easy implementation and operation, and obvious economic benefits.

Active Publication Date: 2021-07-16
积成能源有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On-site manual inspections are the main method for component weed occlusion faults. Some projects with better online data monitoring will conduct manual spot inspections on power stations with significantly lower power generation, so timely and accurate fault diagnosis and positioning cannot be achieved.

Method used

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  • Weed shading diagnosis and troubleshooting method for distributed photovoltaic power plants
  • Weed shading diagnosis and troubleshooting method for distributed photovoltaic power plants
  • Weed shading diagnosis and troubleshooting method for distributed photovoltaic power plants

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Embodiment Construction

[0042] Now with reference to the accompanying drawings, the embodiments of the present invention will be described in detail. The embodiment of the present invention is divided into four major steps of weed occlusion diagnosis triggering, weed occlusion determination, weed occlusion alarm push, and weed occlusion fault troubleshooting and determination, wherein the first three steps are the process of weed occlusion fault diagnosis. It should be noted that all data in the four steps need to exclude data when faults such as external network alarms, string disconnection, and power plant equipment alarms occur. In this embodiment, a photovoltaic power station located in Jinan City, Shandong Province is taken as an example, so the diagnosis of weed shading faults is only performed during the five months from May to September.

[0043] Such as figure 1 Shown is a logic flow diagram of the present invention. The weed shading diagnosis and troubleshooting determination method of a ...

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Abstract

The invention relates to a weed shading diagnosis and troubleshooting determination method for a distributed photovoltaic power station, which judges whether weed shading diagnosis needs to be performed on the current day; calculates the daily dispersion rate; compares the daily dispersion rate with a threshold dispersion rate; calculates this week Average dispersion rate, and compare with the average dispersion rate of last week; calculate the ratio of power station power and benchmark power in the first 15 days; group the ratio of 15 days according to the adjacent 3 days, and find the average value of the ratio of 5 groups; compare The size of the average value of two adjacent groups; push the weed occlusion fault alarm or the suspected weed occlusion fault prompt; continue to judge the weed occlusion fault elimination from the second day after the weed occlusion fault alarm is pushed. The invention realizes the remote precise positioning of weed blocking faults, and automatically recovers after on-site weeding and troubleshooting; manual point inspection and patrol inspection are not required, and the operation and maintenance cost of distributed photovoltaic power stations is reduced; the implementation is simple and easy to operate, and the economic input cost is relatively low. Low.

Description

technical field [0001] The invention relates to the technical field of operation and maintenance of distributed photovoltaic power plants, in particular to a method for diagnosing and troubleshooting determination of weeds in a distributed photovoltaic power plant. Background technique [0002] At present, distributed photovoltaic power stations are being built in poverty-stricken areas all over the country. The photovoltaic modules used in photovoltaic power stations are composed of dozens of photovoltaic cells connected in series. Made of semiconductor material. When there is a shading object attached to the surface of the module, on the one hand, the shaded battery unit cannot generate electricity due to lack of light; at the same time, because the battery unit that does not generate electricity is still connected in series in the power generation circuit of the photovoltaic module, the power flowing through the battery unit Part of the electrical energy carried by the c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/00G06Q10/06G06Q50/06
CPCG06Q10/0639G06Q10/20G06Q50/06Y04S10/50
Inventor 徐惠三刘新锋宋冰飞张旖旎
Owner 积成能源有限公司
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