Rogers, Daniel J.  ORCID: https://orcid.org/0000-0001-8814-5332 and Green, Tim C.
2010.
Zero-current zero-voltage switching for on-load tap-changers.
Presented at: Power Electronics, Machines and Drives (PEMD),
Brighton, UK,
19-21 April 2010.
5th IET Conference on Power Electronics, Machines and Drives.
IEEE,
10.1049/cp.2010.0039
|
Abstract
We present a new on-load tap changer (OLTC) design that provides the traditional advantages of the semiconductor-assisted OLTC over the classic, mechanical OLTC. The design provides zero-current, zero-voltage operation of both diverter switches at all times, eliminating contact wear due to arcing. The design of the diverter sub-circuit is discussed, including the introduction of a voltage source and corresponding control loop that provides the necessary shunt current or voltage to create the desired zero conditions in the diverter switches. The design differs from existing semiconductor-assisted OLTC systems by the fact that the semiconductor portion of the system is connected in a purely shunt configuration to the main current path. Under normal conditions the load current flows only in the selector and diverter switches making the system very low loss.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Engineering |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Uncontrolled Keywords: | contact arcing ; mechanical switching ; on-load tap changer ; power electronics |
| Publisher: | IEEE |
| Last Modified: | 21 Oct 2022 10:00 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/38686 |
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