局部放電是目前辨識高壓設備絕緣劣化程度的重要方法之一。本研究建立一套絕緣油局部放電之試驗平台，用五種典型電極仿製變壓器內部繞組與匝間之瑕疵。依據其瑕疵類型製作樣本進行量測，並利用高頻比流器(HFCT)及局部放電檢測儀(PD Guard)擷取放電訊號，再將圖譜以放電量大小、脈衝頻率及脈衝上升時間等特徵值作分析比較。實驗結果顯示油中含導電粒子對於絕緣油劣化程度影響最嚴重，而油中內部為均勻電場之球-球類型則對絕緣油劣化程度影響最輕微。最後建立之瑕疵特徵趨勢圖期望可作為維護人員判斷瑕疵型態的參考依據，進而對高壓電力設備進行有效又正確的維護工作。

Recently, one of the important method of partial discharge is recognition of insulation deterioration in HV apparatus. An experiment platform for the testing of the partial discharge of insulation oil was set up and five typical artificial electrodes were established for the simulation of the windings and turns defects in power transformer. According to the characteristics of the five defects, the PD signals were measured by the HFCT and PD Guard instruments.And, the patterns with magnitude of charges, pulse-frequency and pulse rise-time were be analyzed.The results provide that the most serious effect for the degradation of insulation oil is the oil involving conductive particle.And, the slightest for the degradation of insulation oil is the oil including uniform electrical field of sphere-sphere type. Lastly, the trend charts of each defect data could be provided for helping to discriminate the PD defect types and an effective and correct maintenance for HV equipment can be carried out.

參考文獻
[1]M. Pompili, C. Mazzetti, and R. Bartnikas, “Phase relationship of PD pulses in dielectrics liquids under AC conditions, ” IEEE Transactions on Dielectrics and
Electrical Insulation, Vol.7, No.1, pp.113–117, Feb.2000.
[2]M. Pompili, C. Mazzetti, and R. Bartnikas, “Partial discharge pulse sequence patterns and cavity development times in transformer oils under AC conditions, ” IEEE Transactions on Dielectrics and Electrical Insulation, Vol.12, No.2, pp.395–403, Apr.2005.
[3]M. Pompili, C. Mazzetti, and R. Bartnikas, “PD pulse burst characteristics of transformer oils, ” IEEE Transactions on Power Delivery, Vol.21, No.2, pp.689–
698, Apr.2006.
[4]台電供電系統事故案例管理系統, “http://10.4.200.150/ACKM, ” 2013年1月。
[5]J. C. Devins, S. J. Rzad, and R.J.Schwabe, “Prebreakdown phenomena in sphere‐sphere electrode configurations in dielectric liquids, ” Applied Physics Letters, Vol.31, No.5, pp.313 – 314, Sep.1977.
[6]J. C. Devins, S. J. Rzad, and R. J. Schwabe, “Transient behavior in transformer oils: prebreakdown and breakdown phenomena, ” IEEE Transactions on Dielectrics andElectrical Insulation, Vol.14, No.6 , pp.289– 296, Dec.1979.
[7]J. C. Devins, S. J. Rzad, and R. J. Schwabe, “ Breakdown and prebreakdown pheno- mena in liquids, ” Journal of Applied Physics, Vol.52, No.7, pp.4531–4545, 1981.
[8]A. Denat, “ High field conduction and prebreakdown phenomena in dielectric liquids, ” IEEE Transactions on Dielectrics and Electrical Insulation, Vol.13, No.3, pp.518-525, 2006.
[9]S. A.Ward, “Evaluating transformer condition using DGA oil analysis, ” IEEE Electrical Insulation and Dielectric Phenomena, pp.463-468, 2003.
[10]J. L. Guardado, J. L. Naredo, P. Moreno, and C. R. Fuerte, “A comparative study of neural network efficiency in power transformers diagnosis using dissolved gas analysis, ” IEEE Transactions on Power Delivery, Vol.16, No.4, pp.643-647, Oct.2001.
[11]Y. C. Huang and H. C. Sun, “Dissolved gas analysis of mineral oil for power transformer fault diagnosis using fuzzy logic, ” IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 20, No.3, pp.974-981, June 2013.
[12]A. H. El-Hag, Y. A. Saker, and I.Y. Shurrab, “Online oil condition monitoring using a partial discharge signal, ” IEEE Transactions on Power Delivery, Vol.26, No.2, pp.1288-1292, Apr.2011.
[13]Q. Zhou, Y. Zhang, W. D. AN, F. Liu, R. J. Liao, and X. Zhang, “ PD pattern recognition in oil-paper insulation based on discharge time interval, ” High Voltage Engineering and Application, pp.313–316, International Conference on 2010.
[14]S. Coenen and S. Tenbohlen, “Location of PD sources in power trans- formers by UHF and acoustic measurements, ” IEEE Transactions on Dielectrics and Electrical Insulation, Vol.19, No.6, pp.1934-1940, Dec.2012.
[15]錢旭耀編著，「變壓器油及相關故障診斷處理技術」 北京，中國電力出版社，2008。
[16]謝建賢、莊忠勇、梁文禎、陳慶守，「變壓器TCG檢測分析研究」，台灣電力公司94年研究報告，2005。
[17]陳昭榮、范振理、鄭強，「電力變壓器延壽計畫及殘餘壽命評估」台灣電力公司99年研究報告，2010。
[18]台灣電力股份有限公司，「供電處供電單位變電設備維護手冊」2007年12月。
[19]「油入變壓器之保守管理」, 電氣協同研究第54卷第5號。
[20]“High-voltage test techniques-partial discharge measurement, ” IEC60270, 2001.
[21]陳宗寶，「應用音射檢測法於電力電纜之局部放電研究」，碩士論文，國立成功大學電機工程學系專班，民國九十九年。
[22]E. GulskI, “Digital analysis of partial discharge, ” IEEE Transactions on Dielectrics and Electrical Insulation,Vol.2, No.5, pp.822-837, Oct.1995.
[23]F. H. Kreuger, E. Gulski, and A. rivda, “Classification of partial discharge, ” IEEE Transactions on Dielectrics and Electrical Insulation,Vol.28, No.6, pp.917-931, 1993.
[24]A. H. Sharbaugh, J. C. Devins, and S. J.Rzad, “Progress in the field of electric breakdown in dielectric liquids, ” IEEE Transactions on Dielectrics and Electrical Insulation, Vol.13, No.4, pp.249-276, 1978.
[25]P. K. Watson, “Electrostatic and hydrodynamic effects in the electrical breakdown of liquid dielectrics, ” IEEE Transactions on Dielectrics and Electrical Insulation, Vol.20, No.2, pp.395-399, 1985.
[26]李群、謝建賢，「變壓器內部故障油中氣體分析之等效過熱面積綜合診斷技術」，台灣電力公司100年研究報告，2011。
[27]陳建富，「模鑄型變壓器部分放電之音射檢測法」，行政院國家科學委員會電力科技產業學術合作研究計畫，1998 年。
[28]G. C. Montanari, A. Cavallini, and F. Puletti, “A new approach to partial discharge testing of HV cable systems, ”IEEE Electrical Insulation Magazine, Vol.22, No.1, pp.14-23, Feb.2006.
[29]R. Bartnikas, “A comment concerning the rise times of partial discharge pulses, ” IEEE Transactions on Dielectrics and Electrical Insulation, Vol.12, No.2, pp.196–202, 2005
[30]R. Bartnikas and J. P. Novak, “On the character of different forms of partial dis- charges and their related terminologies, ” IEEE Transactions on Dielectrics and Electrical Insulation, Vol.28, No.6, pp.956–968, 1993.
[31]M. Florkowski and B. Florkowska, “Phase-resolved rise-time-based discrimination of partial discharges, ” IET Generation Transmission & Distribution, Vol.3, No.1,pp.115–124, 2009.