模鑄型變壓器所使用的絕緣樹脂材料中，若有空隙或細微雜質殘存，則當變壓器被供電時，在該處將引發部分放電現象。若此放電能量超過該絕緣材料之耐受程度時，將危及變壓器而造成毀損，為預防此現象則需仰賴部分放電偵測技術。英國電機研究協會所訂定之量測漏電荷量的方式，是目前國內普遍使用的方法，此法之靈敏度高，但無法運用於即時偵測。本論文針對音射原理應用於偵測模鑄型變壓器部分放電的技術作探討，經由實測證明，具有即時偵測功能之音射偵測法，不只能適用於油浸式變壓器；更可運用在模鑄型變壓器上。在實驗中更發現，模鑄型變壓器之音射信號存有數百萬赫芝以上未曾被察覺的頻率成份，將可做為更深入研究模鑄型變壓器部分放電的參考。

Defects in the cast-resin dry-type transformer, such as particles or voids, when apply voltage to this transformer will produce partial discharge activity. It will cause degradation in insulated material for transformer when the partial discharge leakage energy reaches to some extent. For the measurement of partial discharge in transformer, Electrical Research Association method is a method to measure the leakage electrical energy. Although the high sensitivity is the merit of this method, it is not well developed for online monitor the performance of cast-resin dry-type transformer. In this thesis, Acoustic Emission technique was proposed to detect the degradation of the cast-resin dry-type transformer. Experimental results show that the method of Acoustic Emission is adequate for online monitor, and can substitute the Electrical Research Association method. From the field test of the Acoustic Emission techniques, the part of high frequency is measured that has never been discussed. It will be able to provide the more information in partial discharge phenomenon of cast-resin dry-type transformer.

1. 方治國, “音洩檢測原理與應用”, 檢測科技十六捲一期（1-2）1998。
2. A. Marinescu, G. Georgescu, and V. Filiseanu, , “Ultrasonic Equipment for Detecting, Measuring and Location of Partial Discharges at Power Transformer”, Proc. 7th Int. Symp. on High Voltage Eng., pp.127-131, 1991。
3. L. Lundgard and B. Skyberg, “Acoustic Diagnosis of SF6 Gas Insulated Substations”, IEEE Trans. On Power Delivery, 5 , pp.1751-1759,1990。
4. L. Ghirelli, W. Koltunowicz, A. Pigini, S. Prasath and A.Yellaiah, “Acoustical Method for Partial Discharge Dsection in High Power Capacitors”, Proceedings of the International Conference on Partial Discharge. Pp.92-93, 1993。
5. M. Leijon, L. Ming, T. Bengtsson, and O. Kristofersson, “PD Detection in Cable Terminations using Acoustic Technique”, CIGRE Berlin Symp., 1993。
6. Y Tian, P L Lewin, A E Davies, and Z Richardson, “Acoustic Emission Detection of Partial Discharges in Polymeric Insulation”, High Voltage Engineering Symposium, pp22-27 August 1999 Conference Publication No. 467, @IEE, 1999。
7. J. C. Spanner, A. Brown, and A. Pollock “Fundamentals of Acoustic Emission Testing”, Nondestructive Testing Handbook, 2nd Ed, Vol. 5,pp. 11-44, 1987.。
8. 陳建富, “模鑄型變壓器部分放電之檢測”, 行政院國家科學委員會89年度電力科技產業學術合作研究計畫。
9. P. P. Nelson and D. S. Glaster (1989), “AE and Discrete Fracture Propagation in Rock”, Acoustic Emission/ Microseismic Activity in Geological Structures and Materials, Proceedings of the 4th Conference, ed. By Hardy H.R. Jr, pp.117-130.。
10. L.E.Lundgaard, “Partial Discharge –Part XIII: Acoustic Partial Discharge Detection- Fundamental Considerations”, IEEE Electrical Insulation Magazine, Vol.8, No.4, pp. 25-29, July/August 1992.。
11. 馬瑞平, “智能材料在感測器技術上之發展現況”, 機電整合,機電整合雜誌出版社, , pp.97-107, December 2001.。
12. 劉志放, “高電壓工程”, 徐氏基金會, pp.183-207.。
13. E. T. Norton and S. Nilsson, “Acoustic Emission Detection of Partial Discharges in Power Transformers”, PAC Partial Discharge Detection HandBook.。
14. B. Fruth and L. Niemeyer, “The Importance of Statistical Characteristics of Partial Discharge Data”, IEEE Transaction on Electrical Insulation, pp 60-69, Vol. 27 No.1, February 1992.。
15. H. Ma, J. Ma, G. Wu, Z. Huang, X. Wu, and H. Xie, “Study on characteristics of Ultra-wideband Partial Discharge of Typical Insulation Samples”, Proceedings of 1998 International Symposium on Electrical Insulating Materials, pp.697-700.
16. H. Ma, J. Ma, G. Wu, Z. Huang, X. Wu, and H. Xie, “The Study of Broadband Current Transducer System for On-line Monitoring of Partial Discharge in Turbine Generator”, Proceedings of 1998 International Symposium on Electrical Insulating Materials, pp. 217-220, September 1990.
17. Y. Cheng, H. Xie, and W. Li , “Study on Characteristics of Ultra-wideband Discharge of Typical Insulation Sample”, Proceeding of 1998 International Symposium on Electrical Insulating Materials, in conjunction with 1998 Asian International Conference on Dielectrics and Electrical Insulation and the 30th Symposium on Electrical Insulating Materials, Japan, pp.27-30, September 1998.