NDLI: Experimental Comparison of Conventional and Optical Current Transformers

Content Provider	IEEE Xplore Digital Library
Author	Kucuksari, S. Karady, G.G.
Copyright Year	1986
Abstract	Several manufacturers offer optical current transformers (OCTs) to replace the conventional magnetic current transformers (CTs). This paper compares the performances of some commercially available optical and conventional CTs. The steady state and transient responses of the two systems are compared in a laboratory. Field records are also obtained and evaluated to verify that the optical systems can replace conventional instrument transformers. In addition, OCT step response as well as the impact of ambient temperature on the OCT performance has been investigated. Results show that optical CTs are more than suitable for replacing conventional CTs. Further, the results also show that OCT has better frequency response than conventional CT. Differences found in the field and laboratory measurements are within experimental errors. Unlike the conventional CT, the OCT can have a digital output according to the IEC 61850 standard. The digital output of the OCT is tested for its frequency-amplitude characteristic. Results confirm that digital output has a narrower bandwidth than the low energy analog output of the OCT due to the limited sampling rate prescribed in a UCA guide to IEC-61850-9-2.
Sponsorship	IEEE Power Engineering Society
Starting Page	2455
Ending Page	2463
Page Count	9
File Size	923287
File Format	PDF
ISSN	08858977
Volume Number	25
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Current transformers Optical sensors Current measurement Saturation magnetization Transient analysis Power system protection Optical switches transient response Current transformers (CTs) optical transducers power system protection
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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