A testing device and method for testing the liquefaction temperature of insulating gas
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A technology of insulating gas and liquefaction temperature, which is used in measuring devices, testing dielectric strength, measuring fluid pressure, etc., can solve the problem of inability to verify the liquefaction temperature in field testing, and achieve the effect of enhancing accuracy and reliability and simple operation.
Active Publication Date: 2020-05-05
STATE GRID SHAANXI ELECTRIC POWER RES INST +3
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The insulating gas liquefaction temperature testing device of the present invention can more accurately measure the liquefaction temperature of the environmentally friendly insulating gas, and the operation is convenient, quick and intuitive, and can not only overcome the approximation problem existing in the calculated value based on the ideal gas equation, but also overcome the inability to verify the liquefaction temperature of the field test The problem
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Embodiment 1
[0070] refer to Figure 4 , use manual operation or program setting to set the temperature of the incubator through the data monitoring and processing unit as the initial temperature is 293K, the end temperature is 253K, and it is constant for 5 minutes per 1K, the gas injection pressure of the constant volume bottle is set to 2900kpa, and the gas injection port is Gas distribution unit MF1 port, select the measurement mode to draw the pressure and temperature curve.
[0071] Before gas injection, start the gas pump, empty the residual gas in the constant volume bottle until the vacuum degree reaches the set value, inject a gas of 2900kpa, start the thermostat, keep constant for 5 minutes every 1K, record the pressure gauge value, record the temperature value, and draw two-dimensional At the first point of the plane curve, lower 1K and keep it constant for 5 minutes, record the pressure gauge value, record the temperature value, draw the second point of the two-dimensional pla...
Embodiment 2
[0073] refer to Figure 5 , use manual operation or program setting to set the temperature of the incubator through the data monitoring and processing unit as the initial temperature is 293K, the end temperature is 443K, 293K to 383K, every 20K constant for 5min, 383K to 423K, every 1K constant for 5min, 423K To 443K, keep constant for 5 minutes every 20K, set the gas injection pressure of the constant volume bottle to 100kpa, the gas injection port is MF1 port of 3 gas distribution units, select the measurement mode to draw the pressure temperature curve.
[0074] Before gas injection, start the gas pump, empty the residual gas in the constant volume bottle until the vacuum degree reaches the set value, inject a certain gas of 100kpa, start the thermostat, record the pressure gauge value and temperature value according to the program, and draw a two-dimensional plane curve The first point: increase the temperature and record the pressure gauge value according to the program, ...
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Abstract
The invention discloses a test device used for testing insulating gas liquefaction temperature and a test method used for testing insulating gas liquefaction temperature. The test device comprises a constant temperature box, a constant volume bottle, a gas distributing device, a liquid phase detection device and a data monitoring and processing unit. The temperature range of the constant temperature box is adjustable. The constant volume bottle is arranged in the constant temperature box. The constant volume bottle is internally provided with a temperature meter and a pressure meter. The liquid phase detection device comprises an optical fiber scene processing unit and a schering bridge. The liquid phase detection device is connected and communicated with the constant volume bottle. The detection end of the schering bridge is arranged in the constant volume bottle. The gas distributing device is communicated with the constant volume bottle. The temperature meter, the pressure meter, the constant temperature box, the gas distributing device and the liquid phase detection device are connected with the data monitoring and processing unit through a signal line. According to the test device, the approximation problem existing on the basis of the ideal gas equation calculation value can be overcome and the insulating gas liquefaction temperature can be tested and verified on site; and two test methods of high operability are integrated to perform mutual verification of the test accuracy of the liquefaction temperature.
Description
technical field [0001] The invention relates to the technical field of detection of physical and chemical properties of insulating gas, in particular to a testing device and method for testing the liquefaction temperature of insulating gas. Background technique [0002] With the large-scale construction and operation of high-voltage, ultra-high voltage and ultra-high voltage power grids, combined metal-enclosed gas-insulated electrical equipment: gas-insulated metal-enclosed switchgear (GIS) and gas-insulated metal-enclosed transmission lines (GIL) have been widely used. Among them, GIS equipment is put into operation with an annual growth rate of 40%. Sulfur hexafluoride (SF) as the main insulating gas in GIS equipment 6 ) are heavily used. SF 6 It has a strong greenhouse effect, its atmospheric life is as high as 3200 years, and its greenhouse effect is 23,900 times that of carbon dioxide. It is listed by the international community as one of the six greenhouse gases tha...
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