Online monitoring device for water content of SF6 gas in high-voltage switch electrical equipment

A high-voltage switch and monitoring device technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of personnel health threats, inaccurate measurement, poor precision, etc., to solve the problem of unstable test data, convenient reading data, and measurement The effect of accurate data

Inactive Publication Date: 2014-12-24
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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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) Every measurement must discharge a certain amount of SF6 gas from the gas container of the high-voltage switchgear equipment, which poses a serious threat to environmental pollution and personnel 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

Method used

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  • Online monitoring device for water content of SF6 gas in high-voltage switch electrical equipment
  • Online monitoring device for water content of SF6 gas in high-voltage switch electrical equipment
  • Online monitoring device for water content of SF6 gas in high-voltage switch electrical equipment

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Embodiment Construction

[0023] The specific situation of the present invention will be further described in detail below in conjunction with relevant drawings.

[0024] Such as figure 1As shown, its circuit connection is: phase A pressure transmitter 1 is connected with phase A pressure signal processing amplifier circuit 10; phase A temperature sensor 2 is connected with phase A temperature signal processing amplifier circuit 11; phase A humidity sensor 3 is connected with phase A temperature signal processing amplifier circuit 11; The humidity signal amplification processing circuit 12 is connected; the B-phase pressure transmitter 4 is connected with the B-phase pressure signal processing amplification circuit 13; the B-phase temperature sensor 5 is connected with the B-phase temperature signal amplification processing circuit 14; the B-phase humidity sensor 6 It is connected with phase B humidity signal amplification processing circuit 15; phase C pressure transmitter 7 is connected with phase C ...

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Abstract

An online monitoring device for water content of SF6 gas in high-voltage switch electrical equipment is characterized by mainly comprising a module power supply, three signal processing amplification circuits, multi-way switches, an A / D (analog to digital) converter, a single chip microcomputer, a communication conversion circuit as well as two temperature sensors, three pressure transducers, three humidity sensors and the like which can simultaneously measure three SF6 gas chambers in an A-phase transfer high-voltage switch, a B-phase transfer high-voltage switch and a C-phase transfer high-voltage switch. The device has the advantages as follows: 1, inconvenient and inaccurate traditional monitoring mode with operation risk due to the fact that instruments such as an electrolysis instrument, a condensation instrument and the like are required to be taken to the field for measurement can be changed, and online monitoring and remote monitoring are realized; 2, the measurement sensors are corrected and compensated by circuits in the transducers, the output linearity is good, and the humidity accuracy is one time higher than the national standard; 3, the device is suitable for the high-frequency electric field environment and the outdoor environment; and 4, SF6 gas emission is greatly reduced, the body health of a worker is guaranteed, and the environment pollution is reduced.

Description

technical field [0001] The invention relates to an online state monitoring device for high-voltage switching electrical equipment, in particular to an online monitoring device for the water content of SF6 gas in equipment containers such as high-voltage circuit breakers and GIS, and belongs to the technical field of electric equipment measurement. Background technique [0002] SF6 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. When the water content of SF6 gas reaches a certain level, under the action of electric charge, its decomposition products produce some toxic and harmful gases through hydrolysis reaction; at the same time, SF6 gas is the main gas that produces the greenhouse effect. A large number of high-voltage circuit breakers and GIS and other equipment are mostly working o...

Claims

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Application Information

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IPC IPC(8): G01N35/00G01N33/00
Inventor 胡绍刚刘君戚雪李旭阳陈昱达孙道军
Owner STATE GRID CORP OF CHINA
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