بررسی بارداری استاتيکی روغن ترانسفورماتورها با استفاده از تجهيزات سيستم مدار باز
محورهای موضوعی : مهندسی برق و کامپیوتربهروز وحیدی 1 , قادر رسولي هاشم‌آباد 2
1 - دانشگاه صنعتی امیرکبیر
2 - دانشگاه صنعتی امیرکبیر
کلید واژه: روغن ترانسفورماتوربارداری استاتيکیشکست الکتريکیگردش روغنمدار باز,
چکیده مقاله :
بارداری استاتيکی ناشی از گردش روغن به‌عنوان عامل اصلی چندين شکست الکتريکی در ترانسفورماتورهای بزرگ خنک‌شونده با روغن شناسایی شده است. در اين مقاله پديده بارداری استاتيکی با استفاده از تجهيزات مدار باز مورد بررسی قرار گرفته است. در ادامه از روی نتايج آزمايشگاهی به‌دست آمده توسط نويسندگان مقاله، تأثير شدت ميدان الکتريکی اعمالی، دما، سرعت گردش روغن و اثر توقف گردش روغن بر روی پديده بارداری بررسی و تحليل شده است.
Static electrification due to oil flow is the main reason for several electrical breakdown in large transformers. In the present paper this phenomenon has been investigated by the aid of open cycle system. Finally from tests results obtained by authors, the effects of applied electric field, temperature and oil flow velocity on static electrification have been investigated.
[1] I. A. Metwally, "Influence of solid insulation phase on streaming electrification of transformer oil," IEEE Trans. on Dielectric and Electrical Insulation, vol. 4, no. 3, pp. 327-338, Jun. 1997.
[2] G. G. Touchard, T. W. Patzek, and C. J. Radke, "A physicochemical explanation for flow electrification in low conductivity liquids," IEEE Trans. on Industry Applications, vol. 32, no. 5, pp. 1051-1057,Oct. 1996.
[3] A. Sierota and J. Rungis, "Electrostatic charging in transformer oils testing and assessment," IEEE Trans. on Dielectric and Electrical Insulation, vol. 1, no. 5, pp. 840-870, Oct. 1994.
[4] J. Kedzia, "Investigation of transformer oil electrification in a spinning disk system," IEEE Trans. on Electrical Insulation, vol. 24, no. 1, pp. 59-65, Feb. 1989.
[5] R. M. Radwan, R. M. El - Dewieny, and I. A. Metwally,"Investigation of static electrification due to transformer oil flow in electric power apparatus," IEEE Trans. on Dielectrics and Electrical Insulation, vol. 27, no. 2, pp. 278-286, Apr. 1992.
[6] R. M. Radwan, R. M. El - Dewieny, T. D. Aish, and I. A. Metwally,"Factor affecting transformer oil flow electrification in electric power transformer," in Conf. on Electrical Insulation and Dielectric Phenomena, IEEE Annual Report, pp. 642-647, Pocona Manor, US, Oct. 1990.
[7] I. A. Metwally, "Characterization of static electrification in power transformer," IEEE Trans. on Dielectrics and Electrical Insulation, vol. 3, no. 3, pp. 307-315, Apr. 1996.
[8] I. A. Metwally and Y. A. Abed, "Static electrification phenomenon in large forced oil - cooled power transformers," in Proc. 9th Int. Symp. on High Voltage Eng., pp. 1020.1-1020.4, Graz, Austria,1995.
[9] D. W. Crofts, "The static electrification phenomena in power transformers," IEEE Trans. on Electrical Insulation, vol. 23, no. 1,pp. 137-146, Feb. 1988.
