DOI QR코드

DOI QR Code

Leakage Current Waveforms of Outdoor Polymeric Insulators and Possibility of Application for Diagnostics of Insulator Conditions

  • Suwarno Suwarno (Dept. of Electrical Engineering, Bandung Institute of Technology)
  • 발행 : 2006.03.01

초록

This paper reports the investigation results on the leakage currents (LC) on polymeric outdoor insulators. The samples used were EPDM (ethylene prophylene diene monomer) insulators used at 20 kV distribution lines. AC voltage was applied and the LC waveforms were measured under various environmental conditions (humidity and pollution). Digital data of the LC was transferred from a digital storage oscilloscope to a computer for further analysis. The LC waveform parameters such as magnitude and harmonic content (as indicated by the total harmonic distortion (THD)) were analyzed. The experimental results showed that 3rd, 5th and 7th harmonics and higher odd harmonics were observed for symmetrical-distorted LC waveforms while for unsymmetrical-distorted LC waveforms, odd and even harmonics were observed. The LC analysis indicated that there are 5 stages of insulator conditions from normal condition up to flashover correlated with different kind of LC waveforms. The results also showed that in general the magnitude of LC was good enough to show the condition of the insulators. However, under discharge condition (for example as a result of dry band arching) the LC magnitude should be combined by the THD to show a better correlation with the insulator condition. The product between THD and LC magnitude may be used as a diagnostic parameter.

키워드

참고문헌

  1. Fernando, M.A.R.M., and Gubanski, S. M., 'Leakage Currents on Non-ceramic Insulators and Materials', IEEE Trans. on Dielectrics and Electrical Insulation ,Vol. 6, No. 5, pp. 660-667, Oct. 1999 https://doi.org/10.1109/94.798122
  2. A. Vlastos, T. Orbeck, 'Outdoor Leakage Current Monitoring of Silicone Composite Insulators in Coastal Service Conditions', IEEE Trans., Power Delivery, Vol. 11, No.2, pp. 1066-1070, Apr. 1996 https://doi.org/10.1109/61.489369
  3. Wong, K.L., 'Study of Acoustic Emission (AE) caused by High Voltage Insulators', ICMEP ACEID, Chongqing, China, pp. 272-274, Nov. 2003
  4. Haddad, J. Crespo, AR Rowland, H. Griffiths, DI Williams, 'Techniques for Monitoring Outdoor Polymeric Insulators', ICMEP-ACEID, Chongqing, China, pp. 322-326, Nov. 2003
  5. Suwarno, 'Study on the waveform of Leakage Current on Outdoor Polymeric Insulators', Proc. 2002 Joint Conf. ACED & K-J Symp. On HV, Seoul, Korea, pp. 398-401, Nov. 2002
  6. J Zhidong, G. Haifeng, G. Zhicheng, 'Leakage Current and Flash over of Field-aged RTV coated Insulator', 2002 Joint Conf ACED _K-J Sym, Seoul, Nov. 2002
  7. AH EI Hag, S.H. Jayaram, E.A. Cherney, Fundamental and low Freq. components of LC as a diagnostic Tool to Study Aging of RTV and HTV SIR in Salt-Fog, IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 10, No. I, 2003, pp. 128136, Feb. 2003 https://doi.org/10.1109/TDEI.2003.1176575
  8. T. Suda, 'Frequency Characteristics of Leakage Current Waveforms of a String of Suspension Insulators', IEEE Trans., Power Delivery, Vol. 20, No. 1, pp. 481-487, Jan. 2005 https://doi.org/10.1109/TPWRD.2004.837668
  9. F. Amarch, G. Karady, R. Sundararajan, 'Level Crossing Analysis of Leakage Current Envelope of Polluted Insulators', IEEE Power Engineering Review, pp. 46-49, August 2001
  10. Jeong Ho Kim, Woo Chang Song, Jae Hyung Lee, Yong Kwan Park, Han Goo Cho, Yeong Sik Yoo, Kea Joon Yang, 'Leakage Current Monitoring and Outdoor Degradation of SIR', IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 8 No. 6, pp. 1108-1115, Dec. 2001 https://doi.org/10.1109/94.971471

피인용 문헌

  1. Investigations of Accelerated Aged Polymeric Insulators Using Partial Discharge Signal Measurement and Analysis vol.10, pp.1, 2015, https://doi.org/10.5370/JEET.2015.10.1.299
  2. S-Transform Based Time-Frequency Analysis of Leakage Current Signals of Transmission Line Insulators under Polluted Conditions vol.10, pp.2, 2015, https://doi.org/10.5370/JEET.2015.10.2.616
  3. Time–frequency analyses of leakage current waveforms of high voltage insulators in uniform and non-uniform polluted conditions vol.9, pp.8, 2015, https://doi.org/10.1049/iet-smt.2015.0116
  4. Prediction of Flashover and Pollution Severity of High Voltage Transmission Line Insulators Using Wavelet Transform and Fuzzy C-Means Approach vol.9, pp.5, 2014, https://doi.org/10.5370/JEET.2014.9.5.1677
  5. Tracking/Erosion Resistance Analysis of Nano-Al(OH)3Filled Silicone Rubber Insulating Materials for High Voltage DC Applications vol.10, pp.1, 2015, https://doi.org/10.5370/JEET.2015.10.1.355
  6. Flashover Prediction of Polymeric Insulators Using PD Signal Time-Frequency Analysis and BPA Neural Network Technique vol.9, pp.4, 2014, https://doi.org/10.5370/JEET.2014.9.4.1375
  7. New Field Plate Structure for Suppression of Leakage Current of AlGaN/GaN High Electron Mobility Transistors vol.46, pp.4B, 2007, https://doi.org/10.1143/JJAP.46.2287