High-tension switch electrical equipment SF6 gas water content on-line monitoring device

Abstract

The invention is a device for on-line monitoring the water content of the SF6 gas of high voltage switching electrical appliance, characterized in mainly comprising power supply module, three signal process amplifying circuits, multi-channel switch, MCU, communication switching circuit, and three temperature sensors, three pressure transducers and three humidity sensors for measuring for three SF6 gas rooms in A-B-C three-phase separately-acting high voltage switch, etc. The device has the following advantages: 1. it can realize on-line and remote monitoring; 2. every sensor has good output linearity and the humidity accuracy is above twice higher than the national standard; 3. it is applied to high frequency electric field and outdoor environments; 4. it largely reduce the effluence of SF6 gas, thus assuring the health of operating personnel and reducing environmental pollution, and having completely important significance.

Description

technical field [0001] The invention relates to an on-line status monitoring device for high-voltage switching electrical equipment, especially for SF in containers of equipment such as high-voltage circuit breakers and GIS. 6 The invention relates to on-line monitoring of gas water content, which belongs to the technical field of power equipment measurement. Background technique [0002] SF 6 Gas is an inert gas with good insulation and arc extinguishing properties. Its advantages are more and more recognized by people, and it has been widely used in high-voltage circuit breakers, GIS and other equipment in the past two decades. Thanks to SF 6 During the transmission process of gas in high-voltage power transmission and transformation, SF 6 When the moisture content of the gas reaches a certain level, the SF 6 Under the action of electric charge, the decomposition product of gas produces some toxic gases through hydrolysis reaction; at the s...

AI Technical Summary

Problems solved by technology

[0003] 1) It is necessary to take the dew point meter to the site for measurement frequently. Each measurement must be carried out one by one. The on-site measurement personnel must do a good job of manual records, statistics, and comparisons. It cannot be done online, and remote monitoring cannot be realized.

[0004] 2) Each measurement must discharge a certain amount of SF from the gas container of the high-voltage switchgear equipment 6 gas, which poses a serious threat to environmental pollution and human health

[0005] 3) On-site surveyors need to bring dew point meter and other equipment to the site of high-voltage electrical appliances to measure one by one. Each measurement data is unstable, and there may be several changes in a day

Therefore the measurement is inaccurate and the precision is poor

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