Method for evaluating insulating property of sulfur hexafluoride gas
A technology of sulfur hexafluoride gas and evaluation method, which can be used in measuring devices, instruments, measuring electricity and other directions, and can solve the problems of loss, easy to cause misjudgment, and inability to accurately reflect the insulation and arc extinguishing performance of sulfur hexafluoride. , to achieve the effect of good insulation performance and good protection equipment
Active Publication Date: 2020-11-24
GUANGZHOU MECHANICAL ENG RES INST
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Problems solved by technology
[0007] Existing detection methods all indirectly reflect the insulation and arc extinguishing performance of sulfur hexafluoride by detecting the content of impurities such as air, carbon tetrafluoride, and mineral oil. When there are some non-polar impurities in the insulating parts, the When the insulation performance of sulfur hexafluoride is not affected, the existing methods cannot accurately reflect the insulation and arc-extinguishing performance of sulfur hexafluoride, which may easily lead to misjudgment and unnecessary losses
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Embodiment 1
[0047] This embodiment provides a method for evaluating the insulating performance of sulfur hexafluoride gas, and the flow chart refers to figure 1 shown.
[0048] The materials and reagents involved in this embodiment are as follows:
[0049] Voltage regulator: voltage regulation automatic control system;
[0050] Step transformer: AC power supply (50-60HZ);
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The invention discloses a method for evaluating the insulating property of sulfur hexafluoride gas, and relates to the technical field of sulfur hexafluoride physical and chemical index detection. According to the method, evaluating of the insulating property of the sulfur hexafluoride gas to be tested is carried out by testing the breakdown voltage (standard value) of electrolyzed gas and breakdown voltage test difference of the sulfur hexafluoride gas to be tested before and after electrolysis. The method can directly simulate the change condition of the breakdown voltage after constant-voltage electrolysis is carried out on the equipment at different time and voltage levels, and directly reflects the arc extinguishing and insulating capabilities of the equipment. And the insulation andarc extinguishing performance of sulfur hexafluoride can be indirectly reflected without detecting the content of impurities such as air, carbon tetrafluoride, mineral oil and the like.
Description
technical field [0001] The invention relates to the technical field of detection of physical and chemical indicators of sulfur hexafluoride, in particular to a method for evaluating the insulation performance of sulfur hexafluoride gas. Background technique [0002] Sulfur hexafluoride has good electrical insulation performance and excellent arc extinguishing performance, and is an important insulating medium. It is widely used in arc extinguishing and insulation of sealed transformers and high-voltage switches. The decomposition products of sulfur hexafluoride after high temperature discharge include thionyl fluoride (SOF 2 ), sulfuryl fluoride (SO 2 f 2 ) and sulfur tetrafluoride (SF 4 )Wait. [0003] When SF 6 When the humidity in the gas is high, when an arc occurs in the equipment, SF 6 The arc decomposition of gas will produce many toxic substances under the participation of water, such as SOF 2 , HF, etc., thereby corroding the internal structural materials of ...
Claims
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IPC IPC(8): G01R31/12
CPCG01R31/1281Y02E60/36
Inventor 贺石中王永安丘晖饶张琳颖张静茹朱懋冠谢静石新发周娜
Owner GUANGZHOU MECHANICAL ENG RES INST