Design and Application of Electric Field Sensor for Measuring PD Signals in High Voltage Equipments

고전압설비에서 발생하는 부분방전 검출용 전계센서의 설계 및 특성 검토

  • 이강원 (한국철도기술연구원) ;
  • 강성화 (충청대학 산업안전과) ;
  • 임기조 (충북대학 전기전자공학부)
  • Published : 2003.10.01


It is very difficult and dangerous to measure PD(Partial Discharges) from high voltage equipments in outdoor situation. But that is very important thing for preventing them from more serious accident by defects made by insulating degradation. This paper provides useful method to detect PD signals easily without any dangerous situation. Electric field sensor by the principle of capacitor can detect PD signals without direct connection between sensor and high voltage equipment and has very wide frequency range suitable for noise rejection. Electric field sensor and related circuit for processing PD signal show good performance as a PD sensor when it is applied to simulated high power equipment generating PD pulses.


PD;Electric field sensor;Frequency response;Ψ-q-n;Ψ-n


  1. Judd, M.D., Farish, O., and Pearson, J. S., 'UHF couplers for gas insulated substations-a calibration technique', IEE Proceedings, Sci. Meas. Technol., 144(3), pp117-122, 1997
  2. F. H. Kruger, 'Partial Discharge Detection in High-voltage Equipment, Butterworth & Co. Ltd, pp. 105-106, 1989
  3. Z.Liu, T. R. Blackburn, B. T. Phung and R. E. James, 'Detection of Partial Discharge in Solid and Liquid Insulation with An Electric Field sensor', Proceedings of International symposium on Electrical Insulating materials, P2-17, pp661-664, sept.27-30, 1998
  4. Lutz Niemeyer,' A Generalized Approach to Partial Discharge Modeling', IEEE Tans. on Dielectrics and Electrical Insulation, Vol 2, No.4, pp510-528, August 1995