Browse > Article

Diagnosis Method and Characteristic Analysis of Shorted Turns on Generator Rotor using Flux Sensorless  

Kim Sun-Ja (LS산전 자동화연구소)
Jeon Ywun-Seok ((주)케피코)
Lee Seung-Hak (대덕대학 전기과)
Jeong Byung-Hwan (건국대 대학원 전기공학과)
Lee Myung-Un (서일대학 전기전자컴퓨터공학계열)
Choe Gyu-Ha (건국대 전기공학과)
Publication Information
The Transactions of the Korean Institute of Power Electronics / v.10, no.3, 2005 , pp. 257-263 More about this Journal
Abstract
Short-circuit rotor windings on a generator causes unstable oscillation of unbalance of flux, asymmetrical heat. In order to prevent serious accidents of short-circuit rotor windings, it is important to study the shorted-turn diagnosis method for rotor windings of the generator. To improve the defects of the diagnosis with sensors, the new sensorless method for rotor shorted-turn diagnosis is proposed, which is to measure the electrical values of the voltage and current at the generator and then to detect if the shorted-turned phenomena would occurred. For the feasibility of the suggested method the theoretical results are shown in the aspects of the air-gap flux density, the flux leakage, the generated output voltage and the shorted field current through the digital simulation. Also the possibility of decision for the suggested sensorless method could be shown in this paper.
Keywords
shorted-turned field; sensorless diagnosis method; shorted turn ratio; current balance;
Citations & Related Records
연도 인용수 순위
  • Reference
1 이영준, 김희동, 박종정, 주영호, 조지원, 한상옥, 전력연구원, 인천대학교, 충남대학교, '발전기 회전자 층간단락진단기법', 대한전기학회, 춘계학술대회 논문집, 5, 1998
2 M. P. Jenkins, 'On-Line Monitoring of rotor Shorted Turns', IEE Conference Publication No. 401, pp. 55-60, 1994
3 남종하, 이승학, 최규하, '발전기 회전자의 층간단락 감지기개발', 대한전기학회, 대한전기학회논문지, pp. 307-312, 6, 2002
4 O. J. Penman, H. G. Sedding, B. A. Lioyd and W. T. Fink, 'Detection and Location of Interturn Shorted Circuits in the Stator Windings of operating motors', IEEE Trans on Energy Conversion, Vol. 9, No. 4, pp. 652-658, June 1994   DOI   ScienceOn
5 E. Wochnagg, 'Turbogenerator Field winding Shoted Turn Detection by AC Flux Measurement', IEEE Trans on Energy Conversion, Vol. 9, No. 2, pp. 427-431, 1994   DOI   ScienceOn
6 Vincent Del Toro, Basic Electric Machines, Prentice-Hall International Editions, 1990