Photovoltaic plate failure hazard detection equipment and method based on wireless communication

Abstract

The invention relates to a photovoltaic polar plate fault damage detection device based on wireless communication and a method of the same. The device comprises a temperature sensor, a solar radiation meter, a voltage sensor, a CPU (central processing unit) motherboard, a wireless signal transmitter, a fault display and the like, wherein the CPU motherboard comprises a wireless signal receiver, a radiation amount converter, a power comparator, a current comparator, a temperature converter, a fault discriminator, a register, a fault processor and the like. The temperature sensor, the solar radiation meter and the current transformer are arranged in an array to collect the ambient temperature, the solar radiation flux per unit area and the current of each series group of the photovoltaic array, data are transmitted into the register through wireless communication and respectively to the radiation amount / power converter, the temperature converter, the current comparator and a summing device to obtain the theoretical array output power, the actual array output power, the total current and the current of the series groups with differences, results are transmitted into the power comparator, the fault discriminator and the fault processor to obtain the current fault state and the series group with the fault, and results are transmitted into the fault display. The possibility of failure is verified through coupling of multiple parameters, and thus the false alarm rate can be reduced effectively. Meanwhile, the fault can be positioned, and the speed of troubleshooting of the photovoltaic polar plate can be increased.

Description

technical field [0001] The invention belongs to the field of fault detection of photovoltaic arrays, and in particular relates to a photovoltaic plate fault hazard detection device and method based on wireless communication. Background technique [0002] Large-scale photovoltaic power stations are an important form of photovoltaic power station construction at present. The site selection of large-scale photovoltaic power plants generally has sufficient sunlight resources and sparsely populated areas. The tens of thousands of photovoltaic modules used have a high probability of failure. If potential hidden dangers are not discovered in time and dealt with accordingly, it may happen Serious accidents and hazards affect the overall power generation efficiency of photovoltaic power plants. [0003] The photovoltaic plate is the supply source of the entire photovoltaic power generation system. At present, the common fault forms include: hot spot effect, bypass diode damage, reve...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the existing systems for detecting fault hazards of photovoltaic plates by manual and circuit methods, and provide a system with simple structure, convenient communication, flexible and convenient use, low false alarm rate, and especially suitable for large-scale photovoltaic power plants. Photovoltaic plate fault hazard detection equipment and algorithm based on wireless communication

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