NDLI: New De-excitation Method for Large Hydraulic Generator

Content Provider	Taylor & Francis Online
Author	Lu, Hongshui Wang, Wei Chen, Xianming Zhu, Xiaodong Liu, Guohua
Abstract	The requirement for arc voltage during the opening of a field breaker for large hydraulic generator increases when de-excitation (DE) is performed with a varistor parallel connected to field wingding. In fact, E.M.F of the field winding is required to be higher than the varistor threshold voltage during opening of field breaker. In this paper, the principle of DE with capacitors is introduced. The high voltage produced during DE by the R,L,C series oscillation is used to force the varistor into operation which decreases the opening arc voltage requirement of the field breaker. A simulation is completed to confirm the proper operation of the new DE approach.
Starting Page	234
Ending Page	240
Page Count	7
File Format	PDF HTM / HTML
ISSN	22348972
DOI	10.5370/JICEE.2011.1.2.234
Journal	Journal of International Council on Electrical Engineering
Volume Number	1
Issue Number	2
Language	English
Publisher	Routledge
Publisher Date	2014-09-10
Access Restriction	Open
Subject Keyword	Arc voltage for opening of field breaker Capacitor De-excitation Hydraulic Generator
Content Type	Text
Resource Type	Article

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New De-excitation Method for Large Hydraulic Generator