Device and method for detecting low temperature breakdown voltage and spectrum of mixed gas

A technology of mixed gas and breakdown voltage, applied in measuring devices, using optical methods for testing, measuring electricity, etc., can solve problems such as limitations, achieve the effects of preventing delamination, saving experimental costs, and improving resource utilization

Pending Publication Date: 2017-05-17
SHENYANG POLYTECHNIC UNIV
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  • Application Information

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Problems solved by technology

At present, the application of mixed gas in high-voltage switches is still in the stage of theoretical exploration, and the existing experimental

Method used

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  • Device and method for detecting low temperature breakdown voltage and spectrum of mixed gas
  • Device and method for detecting low temperature breakdown voltage and spectrum of mixed gas
  • Device and method for detecting low temperature breakdown voltage and spectrum of mixed gas

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Embodiment Construction

[0036] An embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0037] SF 6 After mixing with another gas that does not react with it, such as nitrogen, carbon tetrafluoride, carbon dioxide, etc., according to Dalton's partial pressure law, by controlling the SF in the mixed gas 6 The partial pressure of the gas thus regulates the SF 6 The mixing ratio with another gas, that is

[0038]

[0039] In the formula: n A , n B is the number of moles of the two gases; p A ,p B is the partial pressure of the two gases, that is, the pressure borne by the mixture of the two gases, so the SF in the mixed gas can be controlled by controlling the pressure ratio of the two gases 6 gas content.

[0040] like figure 1 As shown, a mixed gas low-temperature breakdown voltage and spectrum detection device in this embodiment includes: SF 6 Mixed gas charging and recovery device 1, low temperature environment setting devi...

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Abstract

The invention relates to a device and method for detecting low temperature breakdown voltage and spectrum of a mixed gas, and belongs to the technical field of high voltage test; the device comprises a SF6 gas mixture charging and recovering device, a low temperature environment setting device, a mixed gas breakdown voltage detecting device and a spectrum collecting device; the method comprises the steps of adjusting distance between electrodes; evacuating a sealed gas chamber and a mixed gas storage tank; filling a cooled mixture into the sealed gas chamber to a set pressure value, and maintaining low temperature; increasing voltage, when the electrodes breakdown, recording oscilloscope readings, and sampling spectrum information when the electrodes breakdown; repeating experiment to get an average value; adjusting the experiment conditions and repeating the experiment; the device and method compensate for experimental measurements in a low temperature environment, and is beneficial for the application of electric equipment in severe cold area and study of micro-parameters of low temperature mixed gas; The device and method can conveniently and accurately control the mixing ratio of the mixed gas, can carry out the recycling and utilization of the mixed gas, can set the temperature of the mixed gas, and the collecting of the spectrum information has a real-time property.

Description

technical field [0001] The invention belongs to the technical field of high-voltage electric tests, and in particular relates to a mixed gas low-temperature breakdown voltage and spectrum detection device and method. Background technique [0002] Since the 1960s, SF 6 Gas is widely used in the power industry due to its high insulation capacity and excellent arc extinguishing performance, such as gas-insulated metal-enclosed switchgear (GIS), gas circuit breaker (GCB), gas transmission line (GIL), etc. However, SF 6 There are some unsatisfactory aspects in practical application: SF 6 The gas is easy to liquefy when the pressure is high and the ambient temperature is too low, which limits the use in cold seasons in winter in alpine regions and poses a serious threat to the safe operation of power equipment; in addition, SF 6 Extensive use of gases will have an impact on the global greenhouse effect, in the "Kyoto Protocol", SF 6 Listed as one of six restricted greenhouse g...

Claims

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Application Information

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IPC IPC(8): G01R31/12
CPCG01R31/1218G01R31/1281
Inventor 李璐维林莘陈会利艾亚萍李鑫涛苏安张佳高佳刘振祥
Owner SHENYANG POLYTECHNIC UNIV
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