SF6 gas on-line monitoring system based on optical fiber looped network mode

Abstract

The invention discloses an SF6 gas on-line monitoring system based on an optical fiber looped network mode. The system is used for a GIL, comprises a plurality of independent gas chambers, and comprises a plurality of sensors which are respectively arranged in the gas chambers of the GIL and are used for collecting the SF6 gas density of each gas chamber; a plurality of acquisition exchangers which are cascaded through optical fibers to form looped networks, wherein each acquisition exchanger is connected with the plurality of sensors through buses; a looped network switch which is connected with the plurality of the looped networks of the acquisition exchangers through optical fibers; and a power monitoring device, wherein the input end of the power monitoring device is connected with thelooped network switch through a network cable, and the output end is connected with an external monitoring background through an optical fiber. According to the invention, the reliability of data transmission is greatly improved in a looped network arrangement manner, and the acquired data can be processed and forwarded in time by adopting acquisition equipment integrated with acquisition and exchange functions, so that the stability of the data is ensured.

Description

technical field [0001] The invention relates to the gas-inflated gas monitoring technology for online operating electrical equipment, in particular to a SF system based on an optical fiber ring network. 6 Gas online monitoring system. Background technique [0002] In the prior art, in the construction of power transmission and distribution networks, gas insulated pipeline buses (GIL, gas insulated line) are commonly used, and the gas filled in them is generally SF 6 Gas is a colorless, odorless, non-toxic, non-combustible stable gas, which is widely used as an insulating medium for high-voltage electrical equipment. Its molecules are very easy to absorb free electrons to form negative ions with large mass, which weakens the collision ionization in the gas. process, so its electrical insulation strength is very high, about 2.5 times that of air in a uniform electric field. However, if SF in the GIL 6 Leakage of the gas causes its density to decrease, which will lead to a s...

AI Technical Summary

Problems solved by technology

However, if SF in the GIL 6 Leakage of the gas causes its density to decrease, which will lead to a significant decrease in its insulation performance. At this time, it is easy to cause the breakdown of the battery in the GIL, and even cause the circuit to be interrupted. However, because the GIL is a closed cylinder, in actual operation In the state, an explosion is likely to occur, which is an unimaginable major accident for some scenes buried deep underground in the city

In prior art, for SF 6 Gas monitoring generally uses segmented gas pressure gauges for measurement, and then collects and uploads them through the collector. However, because GIL is transmitted over long distances, a large number of gas pressure gauges will be used. Today’s monitoring solutions have low transmission efficiency and stability. Insufficient, when the collector fails, it will cause the entire monitoring system to be paralyzed

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