Online resistance-capacitance type method and apparatus for detecting micro-water in sulphur hexafluoride

A sulfur hexafluoride and detector technology, applied in the direction of material impedance, sampling device, material resistance, etc., can solve the problems of inability to apply SF6 gas micro-water on-line measurement, measurement accuracy and use range limitations, etc., to solve the problem of sampling and leakage, the effect of preventing leakage

Active Publication Date: 2006-07-12
南京吉纳波环境测控有限公司
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Problems solved by technology

[0007] At present, there are already moisture measurement technologies and products in China, but due to certain problems in the process, the measurement accuracy and the scope of use are still relatively limited. At present, it is generally only used for moisture measurement in ordinary environments, and cannot be applied to SF6 gas micro water. online measurement of

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  • Online resistance-capacitance type method and apparatus for detecting micro-water in sulphur hexafluoride
  • Online resistance-capacitance type method and apparatus for detecting micro-water in sulphur hexafluoride
  • Online resistance-capacitance type method and apparatus for detecting micro-water in sulphur hexafluoride

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[0031] The working principle and implementation method of the online resistance-capacitance SF6 gas micro-water monitor will be specifically described below in conjunction with the drawings.

[0032] 1) The SF6 gas water sensor is composed of a polymer film capacitive humidity sensor C0 (see figure 1 ) And PT100 platinum resistance temperature sensor Rt (see Figure one ) Is combined. The polymer film capacitor is used to measure the micro water in the SF6 gas, and the PT100 platinum resistance is used to measure the SF6 gas temperature for temperature compensation to ensure the measurement accuracy. The above two together form the online resistance-capacitance SF6 gas micro water The resistance-capacitive humidity sensor of the monitor.

[0033] 2) The resistance-capacitive humidity sensor C0 is directly exposed in SF6 gas (see figure 1 ), the water molecules in the SF6 gas can penetrate the surface of the humidity sensor and penetrate into the polymer film. The capacitance valu...

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Abstract

The online RC sulfur hexafluoride micro-water detector comprises: a SF6-gas sampler, a SF6-gas micro-water sensor with a macromolecular film capacitor humidity sensor for micro-water measurement and a temperature sensor with Pt resistance to measure the SF6 temperature, a high-frequency oscillation circuit with input end connected to said humidity sensor and output end connected to the following conversion circuit, a frequency / voltage conversion circuit to convert the frequency signal into voltage signal direct proportioned to water content for output, and an auto-temperature compensation treatment circuit. This invention solves well the sample, sealing and other difficulty.

Description

Technical field [0001] The invention relates to a detection method and a detection instrument for the micro-water content in sulfur hexafluoride (SF6) gas, in particular to an online resistance-capacitance SF6 micro-water detector. Background technique [0002] Sulfur hexafluoride (SF6) gas is a non-toxic, odorless, colorless, odorless, and non-flammable synthetic gas. It has incomparable insulation properties and arc extinguishing capabilities for general dielectrics. The electrical equipment filled with SF6 has a small footprint, low operating noise and no fire hazard, which greatly improves the safety and reliability of electrical equipment operation. In recent years, SF6 electrical equipment has been widely used at home and abroad, and has shown unparalleled superiority. [0003] In the long-term use of gas-insulated high-voltage circuit breakers, high-voltage transformers, high-voltage transformers, and metal-enclosed electrical appliances (GIS), S...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12G01N27/02G01N1/24
Inventor 刘德允章曙
Owner 南京吉纳波环境测控有限公司
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