Weed occlusion diagnosis and troubleshooting determination method for distributed photovoltaic power station

Abstract

The invention relates to a weed occlusion diagnosis and troubleshooting determination method of a distributed photovoltaic power station. The method includes: determining whether a weed occlusion diagnosis needs to be carried out on a current date; calculating the daily dispersion rate; comparing the daily dispersion rate with the threshold dispersion rate; calculating the average dispersion rateof this week and comparing the average dispersion rate of this week with the average dispersion rate of the last week; calculating the ratios of the electric power of the power station to the benchmark electric power in the first 15 days; grouping the ratios of the first 15 days according to the adjacent 3 days, and calculating the average values of 5 groups of ratios; comparing the average valuesof two adjacent groups; pushing a weed occlusion failure alarm or a suspected weed occlusion failure prompt; and continuing the determination of weed occlusion troubleshooting from the day after theweed occlusion failure alarm is pushed. The invention realizes the remote accurate positioning of the weed occlusion failure, and automatic recovery can be achieved after weeding on the spot and troubleshooting. Manual spot check and patrol inspection can be avoided, the operation and maintenance cost of the distributed photovoltaic power station is reduced, the operation is simple, and the economic input cost is 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...

AI Technical Summary

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.

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