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Title: Over-voltage protection system and method

An over-voltage protection system includes an electronic valve connected across two terminals of a circuit and an over-voltage detection circuit connected across one of the plurality of semiconductor devices for detecting an over-voltage across the circuit. The electronic valve includes a plurality of semiconductor devices connected in series. The over-voltage detection circuit includes a voltage divider circuit connected to a break-over diode in a way to provide a representative low voltage to the break-over diode and an optocoupler configured to receive a current from the break-over diode when the representative low voltage exceeds a threshold voltage of the break-over diode indicating an over-voltage condition. The representative low voltage provided to the break-over diode represents a voltage across the one semiconductor device. A plurality of self-powered gate drive circuits are connected to the plurality of semiconductor devices, wherein the plurality of self-powered gate drive circuits receive over-voltage triggering pulses from the optocoupler during the over-voltage condition and switch on the plurality of semiconductor devices to bypass the circuit.
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Issue Date:
OSTI Identifier:
General Electric Company NETL
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2014 Nov 05
Research Org:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV (United States)
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Arrester and a semiconductor circuit arrangement with a protection device including the same
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Thyristor apparatus employing light-triggered thyristors
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Thyristor valve with improved gate pulse generating scheme
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Protection system for thyristor valve having first and second reverse voltage detection circuits
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Apparatus for protection of power-electronics in series compensating systems
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Device for supervising a high voltage converter station
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DC high power distribution assembly
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Safety Switching Device With Power Supply
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Method And System For Architecture, Control, And Protection Systems Of Modular Stacked Direct Current Subsea Power System
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Protection of thyristors against overvoltage with breakover diodes
journal, January 1988
  • Lawatsch, H.M.; Vitins, J.
  • IEEE Transactions on Industry Applications, Vol. 24, Issue 3, p. 444-448
  • DOI: 10.1109/28.2894

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