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Fault detection method, device and system for photovoltaic module

A photovoltaic module and fault detection technology, applied in the monitoring of photovoltaic systems, photovoltaic power generation, photovoltaic modules, etc., can solve problems such as failure to meet the needs of fault detection, single fault types, and failure to detect fault types

Active Publication Date: 2020-11-17
HEFEI SUNGROW RENEWABLE ENERGY SCI & TECH CO LTD
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AI Technical Summary

Problems solved by technology

Method 2 only uses voltage to detect faults, which can detect a single type of fault, and cannot detect fault types with abnormal parameters
[0005] It can be seen that the current two photovoltaic module fault detection methods have certain problems and cannot meet the higher fault detection requirements.

Method used

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  • Fault detection method, device and system for photovoltaic module
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  • Fault detection method, device and system for photovoltaic module

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Embodiment Construction

[0090] 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.

[0091] The invention provides a photovoltaic module fault detection method, which is applied to a controller, and the controller communicates with each photovoltaic module to realize the detection of photovoltaic module faults caused by abnormal performance parameters, and can also detect faults according to multi-dimensional performance parameters The influence of the current characteristic value determines the fault type of the photovoltaic module, and realiz...

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Abstract

The invention provides a fault detection method, device and system for a photovoltaic module, and the method comprises the steps: obtaining the original information and filtering processing information of a multi-dimensional performance parameter of the photovoltaic module, and combining a multi-dimensional performance parameter value obtained after the normalization processing of the original information with the weight of the multi-dimensional performance parameter; and calculating a current characteristic value representing a current multi-dimensional operation characteristic of the photovoltaic module, and comparing the current characteristic value with a characteristic average value of the photovoltaic module in a preset reference period to determine whether the photovoltaic module has a fault or not, thereby realizing detection of the photovoltaic module fault caused by abnormity of different performance parameters. And the fault type of the photovoltaic module can be determinedaccording to the influence of the multi-dimensional performance parameters on the current characteristic value, so that accurate detection of multiple fault types of the photovoltaic module is realized.

Description

technical field [0001] The present invention relates to the technical field of photovoltaic power generation, and more specifically, to a photovoltaic module fault detection method, device and system. Background technique [0002] The photovoltaic module is the core part of the photovoltaic power generation system, and the operating status of the photovoltaic module directly determines the power generation performance of the photovoltaic power generation system. Therefore, fault detection of photovoltaic modules in photovoltaic power generation systems is an essential process in the daily management of photovoltaic power generation systems. [0003] There are currently two common fault detection methods for photovoltaic modules, one is to obtain the IV curve through component-level IV scanning, and analyze the IV curve for fault detection; The voltage values ​​are compared, and whether there is a fault is judged according to the voltage difference between each photovoltaic ...

Claims

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Application Information

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IPC IPC(8): H02S50/10
CPCH02S50/10Y02E10/50
Inventor 李运生张彦虎周辉陈伟
Owner HEFEI SUNGROW RENEWABLE ENERGY SCI & TECH CO LTD
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