Photovoltaic module intelligent inspection method applied to photovoltaic power generation system

A photovoltaic power generation system and photovoltaic module technology, applied in photovoltaic system monitoring, photovoltaic power generation, reasoning methods and other directions, can solve the problems of MPPT point offset, low inspection efficiency, high use cost, short time to work, measurement Intuitive, convenient and responsive effects

CN108449050BActive Publication Date: 2019-10-08上海探能实业有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-10-08

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Abstract

The invention provides a photovoltaic module intelligent inspection system and a photovoltaic module intelligent inspection method applied to a photovoltaic power generation system. According to the invention, the voltage amplitude change of a reverse diode between the wiring terminals of a photovoltaic module is measured, and then the A / D detection technology is used for collecting voltage signals. The ZigBee wireless transmission technology is adopted, and collected signals are sent to a terminal receiving device. The system is directly connected with a photovoltaic panel wiring terminal through a high-voltage-resistant DC / DC non-isolated converter, so that the self-power supply of the system during the working state is achieved. In combination with three sets of measured voltage, illumination intensity and temperature, a fuzzy control algorithm is designed. Whether a fault belongs to a permanent fault or a temporary fault caused by cloud shielding or tree shielding is judged. Meanwhile, the aging degree of the photovoltaic module can be reflected, and the fault reporting of the system can be realized. The system and the method are suitable for the practical application of a photovoltaic power station and a distributed photovoltaic power generation system.
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Description

Technical field

[0001] The invention relates to the field of photovoltaic power generation fault detection, in particular to an intelligent inspection system and method for photovoltaic components applied to a photovoltaic power generation system. Background technique

[0002] The existing inspection technologies for photovoltaic modules mainly include manual inspection methods and drone inspection methods. The manual inspection method consumes manpower and material resources, the inspection efficiency is low, and it is difficult to meet the requirements of photovoltaic power plants. UAV inspections are susceptible to interference in detection accuracy and high cost of use. It also requires the establishment of an imaging database, which is difficult to meet the actual needs of photovoltaic power plants. At the same time, because the distributed photovoltaic power generation system itself is a distributed power generation system, there is a problem of high labor costs in detecti...

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Embodiment Construction

[0047] The embodiments of the present invention will be described in detail below. This embodiment is developed on the basis of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given.

[0048] figure 1 It is a schematic diagram of the principle of the photovoltaic module intelligent inspection system of the present invention. The rated power is 250W, a total of 60 pieces, each column contains 10 pieces, and each 20 pieces form a series connection, and then 4 terminals are led out, and every two terminals are indirectly reversed. diode. Under normal circumstances, the voltage of the photovoltaic panel is 30V, that is, the potentials of points 1-4 are 30V, 20V, 10V, and 0V respectively; when a slice fails, the string where the slice is located is disconnected, and connect the two terminals of the string The reverse diode is turned on, and the voltage between the terminals changes from 10V to negative voltage,...