Development of an optical current transformer for adjustable speed pumped storage systems

Author

Fujimoto, T. ; Shimizu, Maiko ; Nakagawa, H. ; Sone, I. ; Kawashima, K. ; Mori, E.

Author_Institution

Kansai Electr. Power Co. Inc., Osaka, Japan

Volume

12

Issue

1

fYear

1997

fDate

1/1/1997 12:00:00 AM

Firstpage

45

Lastpage

50

Abstract

The design and testing of a passive optical current transformer utilizing the Faraday effect is described. The optical current transformer (OCT) was developed to measure the rotor excitation current of a 400 MW adjustable speed pumped storage system. Overall dimensions of the bulk optic sensor are 250×250×40 mm and the OCT functions as an overcurrent sensor to a maximum current 35000 A_p. This OCT has been practically applied at the Ohkawachi Power Plant of the Kansai Electric Power Co., Inc. since December 1993

Keywords

Faraday effect; current transformers; electric current measurement; hydroelectric generators; magneto-optical sensors; pumped-storage power stations; rotors; variable speed gear; 250 mm; 35000 A; 40 mm; 400 MW; Faraday effect; Kansai Electric Power Company; Ohkawachi Power Plant; adjustable speed pumped storage systems; bulk optic sensor; overcurrent sensor; passive optical current transformer; rotor excitation current measurement; Current measurement; Current transformers; Faraday effect; Frequency; High speed optical techniques; Optical pumping; Optical sensors; Power generation; Power system reliability; Rotors;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.568224

Filename

568224