NDLI: A Low-Wear Onload Tap Changer Diverter Switch for Frequent Voltage Control on Distribution Networks

Content Provider	IEEE Xplore Digital Library
Author	Rogers, D.J. Green, T.C. Silversides, R.W.
Copyright Year	1986
Abstract	This paper presents a fast mechanical diverter switch design suitable for new “arcless” hybrid onload tap-changing systems. In such systems, arcing at contact separation and contact closure is almost completely eliminated by the inclusion of alternate current paths incorporating semiconductor devices. This allows the use of compact, air-insulated mechanical contacts that do not need to withstand significant arc erosion or provide arc quenching. As a result, the moving mass and the drive system for the switch may be dramatically reduced in size, leading to low inertia of the moving parts and resulting in very rapid operation times. An integrated, high-torque, low-mass permanent-magnet actuator is presented that provides detent (unpowered) contact force coupled with a cantilever spring contact system sized for an 11-kV 2-MVA onload tap changer. The design delivers operation times of under 20 ms and is capable of sustaining more than 10⁶ operations. The complete design is experimentally verified under representative electrical conditions, and contact wear levels comparable to pure mechanical (zero current) operation are demonstrated.
Sponsorship	IEEE Power Engineering Society
Starting Page	860
Ending Page	869
Page Count	10
File Size	1324342
File Format	PDF
ISSN	08858977
Volume Number	29
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Switches Contacts Force Springs Torque Magnetic separation Coils voltage control Arc discharges contacts permanent-magnet machines power distribution switches switchgear
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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