Considerations on the Long-term Reliability of On-line Partial Discharge Ceramic Sensor for Thermal Power Generators and its Demonstration in the Field

  • Sun, Jong-Ho (Industry Applications Research Division, Korea Electrotechnology Research Institute (KERI)) ;
  • Youn, Young-Woo (Industry Applications Research Division, Korea Electrotechnology Research Institute (KERI)) ;
  • Hwang, Don-Ha (Industry Applications Research Division, Korea Electrotechnology Research Institute (KERI)) ;
  • Kang, Dong-Sik (Industry Applications Research Division, Korea Electrotechnology Research Institute (KERI))
  • Received : 2010.11.04
  • Accepted : 2011.08.20
  • Published : 2012.01.01


The present study describes the considerations on the long-term reliability of the on-line partial discharge (PD) ceramic sensor for thermal power generators. Voltage acceleration aging tests were carried out under continuous and impulsive thermal aging at more than $100^{\circ}C$, considering the practical service environment. Experimental results show that the sensors have a life that could last for more than 100 years, excellent dielectric characteristics, and insulation strength. In addition, the ceramic on-line PD sensors were installed in a thermal power generator in Korea for demonstration. The results of the PD calibration and test voltage application prove that the on-line ceramic sensors have satisfactory performances for on-line PD measurement.


Supported by : KETEP


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