NDLI: Switching Surge Characteristics in Gas-Insulated Substation

Content Provider	IEEE Xplore Digital Library
Author	Ametani, A. Goto, T. Yoshizaki, S. Omura, H. Motoyama, H.
Copyright Year	2006
Description	Author affiliation: Dept. of Electr. Eng., Doshisha Univ., Kyotanabe (Ametani, A.; Goto, T.; Yoshizaki, S.; Omura, H.; Motoyama, H.)
Abstract	This paper has investigated switching surge characteristics in low-voltage control circuits transferred from main circuits of gas insulated substations through measuring voltage transformers (VT) and current transformers (CT) based on field measurements and EMTP simulations. The oscillating frequency of the switching surges in main circuits ranges from some MHz to some 10 MHz, and the surge voltages on a control cable are from some 10 V to 300 V in the EMTP simulation. The simulation results agree with the field measurements of the oscillating frequency ranging from 2 MHz to 80 MHz, which don't support the IEC 61000-4-12 recommended frequency 100 kHz and 1 MHz. The measured voltages range from 10 V to nearly 500 V. Mutual coupling between the main circuits and the control cable induces a high frequency oscillating voltage which are superposed on the transferred voltage. Grounding the both ends of the control cable metallic sheath produces another oscillation due to a circulating current in a closed loop composed of the sheath and the grounding circuit.
Starting Page	941
Ending Page	945
File Size	5966005
Page Count	5
File Format	PDF
ISBN	9781861353429
DOI	10.1109/UPEC.2006.367618
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-06
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	UPEC
Subject Keyword	Substations Current transformers Switchgear Circuit simulation Current measurement Frequency Gas insulation Surges Voltage control Switching circuits
Content Type	Text
Resource Type	Article

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