Study on Insulation Diagnosis of Poor Contact between Electrode and Solid Insulator in Eco-Gas

친환경 가스 중 전극과 고체절연체의 불량접촉에 관한 절연진단연구

  • Received : 2015.08.22
  • Accepted : 2015.09.14
  • Published : 2015.10.30


This paper presents the characteristics of partial discharge and radiated electromagnetic waves in the existence of a poor contact for the insulation diagnosis of eco-friendly power equipment. AC surface discharge experiment was conducted to simulate the poor contact between a hive voltage electrode (anode) and a solid insulator in $N_2/O_2$ mixture gas under a non-uniform field. The partial discharge voltage to be measured at 0.3MPa increased with the increase of the poor contact gap and was saturated with the gap. In addition to the partial discharge characteristics, it was verified that the defect of the poor contact can be diagnosed using the radiated electromagnetic waves due to the partial discharge, which measured by a biconical EMC antenna and a spectrum analyzer.


Insulation Diagnosis;Partial Discharge;Poor Contact;Radiated Electromagnetic Waves


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