NDLI: Improved Autotransformer Model for Transient Recovery Voltage (TRV) Studies

Content Provider	IEEE Xplore Digital Library
Author	Horton, R. Dugan, R.C. Wallace, K. Hallmark, D.
Copyright Year	1986
Abstract	A three-phase ungrounded fault supplied by a single autotransformer produces a transient recovery voltage (TRV) that is often the worst case for a circuit breaker (CB). This is the so-called “transformer limited fault.” The transformer model is extremely important for computing this TRV because it is the key element in the circuit. Unfortunately, data that are needed for more sophisticated autotransformers models (e.g. frequency-response analysis (FRA) data) are not readily available to the study engineer. Consequently, time-domain simulations are generally based on simplified second order (RLC) transformer models whose parameters are estimated from curves provided in IEEE Standard C37.011. This paper provides a more robust autotransformer model that is based on measurement data that are more readily available. The model is validated using FRA data from factory tests. TRV simulation results are compared with those produced by simplified second-order models. In addition, capacitance measurement data for twenty-two 230:115-kV autotransformers are provided to expand the body of capacitance data available to the industry.
Sponsorship	IEEE Power Engineering Society
Starting Page	895
Ending Page	901
Page Count	7
File Size	530589
File Format	PDF
ISSN	08858977
Volume Number	27
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Capacitance Windings Integrated circuit modeling Power transformers Capacitance measurement Transient analysis Inductance transient recovery voltage Electromagnetic transients power circuit breakers power transformers
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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