NDLI: Feasibility of Electronic Tap-Changing Stabilizers for Medium Voltage Lines

Content Provider	IEEE Xplore Digital Library
Author	Garcia, S.M. Rodriguez, J.C.C. Jardini, J.A. Lopez, J.V. Segura, A.I. Cid, P.M.M.
Copyright Year	1986
Abstract	Thyristor-based onload tap-changing AC voltage stabilizers are cheap and robust. They have replaced most mechanical tap-changers in low voltage applications from 300 VA to 300 kVA. Nevertheless, this replacement hardily applies to tap-changers associated to transformers feeding medium-voltage lines (typically 69 kV primary, 34.5 kV line, 10 MVA) which need periodical maintenance of contacts and oil. The Electric Power Research Institute (EPRI) has studied the feasibility of this replacement. It detected economical problems derived from the need for series association of thyristors to manage the high voltages involved, and from the current overload developed under line fault. The paper reviews the configurations used in that field and proposes new solutions, using a compensating transformer in the main circuit and multi-winding coils in the commutating circuit, with reduced overload effect and no series association of thyristors, drastically decreasing their number and rating. The stabilizer can be installed at any point of the line and the electronic circuit can be fixed to ground. Subsequent works study and synthesize several commutating circuits in detail.
Sponsorship	IEEE Power Engineering Society
Starting Page	1490
Ending Page	1503
Page Count	14
File Size	1276586
File Format	PDF
ISSN	08858977
Volume Number	24
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Medium voltage Transformers Thyristors Robustness Low voltage Petroleum Electrical fault detection Power generation economics Circuit faults Coils voltage control AC voltage stabilizer onload tap-changer (OLTC) power conditioning power quality
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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