NDLI: 12.6 kA / 20 kV / 300 Hz reverse conducting solid state closing switch for De-NOx / De-SOx modulator

Content Provider	IEEE Xplore Digital Library
Author	Welleman, A. Gekenidis, S.
Copyright Year	2009
Description	Author affiliation: ABB Switzerland Ltd, Semiconductors Fabrikstrasse 3, CH-5600 Lenzburg, Switzerland (Welleman, A.; Gekenidis, S.)
Abstract	The presentation will discuss the specification, the design, the construction and the test results of a solid state switch which is used in De-NOx / De-SOx modulators. The closing switch is operating at a charge voltage of 20 kVdc with a 300 Hz pulse repetition rate and a 12.6 kA, 12 µs exponential decay waveform. In case of arcing in the load the waveform will change to a 250µs damped sine wave. The current rise rate is in access of 10 kA/µs or more. The paper will show the selection criteria of the semiconductor devices, and the optimization of the devices for this application. The complete ready-to-use switch is built-up with a series connection of eight reverse conducting devices with individual driver units which are optical triggered. This construction results in compact stack with very low self inductance. The switch is capable to operate continuous at a pulse repetition rate of 300 Hz and can be cooled by transformer oil or de-ionized water. Information will also be given on reliability and life expectancy based on tests and earlier produced switches.
Starting Page	675
Ending Page	678
File Size	1324964
Page Count	4
File Format	PDF
ISBN	9781424440641
DOI	10.1109/PPC.2009.5386219
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-28
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Solid state circuits Optical switches Modular construction Testing Voltage Semiconductor devices Optical devices Inductance Optical pulses Pulse transformers
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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