关键词: 变压器油, 色谱在线监测系统, 油气分离, 真空脱气, 自动进样, 温度控制, 电磁阀控制, 混合气体分离率

Abstract: In order to improve the reliability of the transformer oil chromatographic on-line monitoring system, in view of the problems of oil and gas, gas mixture separation device, an improved gas-oil dissociation device is developed. The device consists of a vacuum degassing system and an automatic injection system involving temperature control and electromagnetic valve control. Test results show that the device is effective in transformer oil chromatograph on-line monitoring. The degassing of the vacuum degassing system takes less time; within 20 minutes the gas-oil dissociation can reach saturation state. Its size is as small as(100 mm×100 mm×100 mm). It also shows a high separating efficiency. Within 20 minutes the gas mixture degassing rate can reach up to 97.3%, and many fault-characterized gases can be quickly degassed, such as CH₄, C₂H₆, C₂H₄, C₂H₂, H₂ and CO. In June of 2011, the device was successfully commissioned in a substation for high-speed railway passenger special line traction. Since then, it has been working stably and met the demand of field testing.

Key words: transformer oil, chromatographic on-line monitoring system, gas-oil dissociation, vacuum degassing, automatic sampling, temperature control, electromagnetic valve control, degassing rate