Fire early warning system and method for photovoltaic power station

Abstract

The invention discloses a fire early warning system for a photovoltaic power station. The fire early warning system for a photovoltaic power station includes a plurality of temperature-sensing opticalfibers arranged in the photovoltaic power station, a plurality of temperature measuring hosts and a monitoring host, wherein the plurality of temperature-sensing optical fibers use the self-containedmeter standard device to calibrate all the monitoring points in the corresponding optical fiber, and output the optical fiber scattering signals; each temperature measuring host is connected to several temperature-sensing optical fibers to collect the fiber scattering signals output by the temperature-sensing optical fibers connected to the each temperature measuring host in the preset interval,calculate the position data, the field temperature and the temperature level of each monitoring point, and output the monitoring point temperature data set under all the monitoring points; and the monitoring host is connected with the plurality of temperature measuring hosts to monitor all the temperature measuring hosts, receive and analyze the monitoring point temperature data set, perform dataanalysis and processing on the analysis results, and output alarm information. The fire early warning system for a photovoltaic power station has the advantages of a complete fire early warning mechanism, accurate positioning of monitoring point, long monitoring distance, high flexibility, and high anti-interference ability, and all the settings are completed in the terminal, and the whole systemis simple and reliable.

Description

technical field [0001] The invention relates to the technical field of photovoltaic power station alarm monitoring, in particular to a fire early warning system for a photovoltaic power station. Background technique [0002] With the deepening of the energy crisis, the photovoltaic industry has entered a period of rapid development in recent years. Rapid development will inevitably bring more and more safety hazards. Among them, the fire problem of photovoltaic power stations, especially the fire of distributed rooftop photovoltaic power stations, once Appearance may cause immeasurable personal and property losses. In order to reduce the occurrence of fire accidents, on the one hand, product quality should be improved, and on the other hand, preventive measures should be added. [0003] At present, the fire warning of photovoltaic power stations mostly adopts the temperature monitoring technology of the cable method. The cable is composed of two or more wires. When the ambie...

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Problems solved by technology

[0004] 1) The accuracy is low, only a certain local line segment can be used as the alarm unit, and the alarm point cannot be accurately located;

[0005] 2) The monitoring range is small, and the upper limit length of the general alarm unit is 200m;

[0006] 3) Susceptible to electromagnetic interference, often false alarms in strong electric environments

It can resist the interference of weak electric environment, but it cannot be free from any interference in the environment of strong electromagnetic field;

[0007] 4) The alarm temperature cannot be modified arbitrarily, only the set temperature can be alarmed, and the temperature status and temperature development trend can not be judged without alarming, and the flexibility is poor. For the more expensive analog 4-core cable temperature sensor Although the alarm temperature of the detector is adjustable, the accuracy is not high;

[0008] 5) Using heat-sensitive insulating materials, the heat-sensitive characteristics of the insulating materials are often damaged after an alarm, and become a short circuit state, which is difficult to recover, cannot be used again, and can only be replaced again, and the maintenance workload is heavy;

[0009] 6) Due to the use of electrical signals, when the insulation between the wires is very fragile, it is easy to generate a large current or short circuit to form an electric spark and cause a fire, especially in a high-voltage cable tunnel with a strong electromagnetic field. Therefore, the existing technology itself will also cause hidden dangers to the safe operation of the field cable system

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