Global to push GA events into
skip to main content

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.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1354787
Assignee:
General Electric Company NETL
Patent Number(s):
9,640,982
Application Number:
14/533,762
Contract Number:
AC26-07NT42677
Resource Relation:
Patent File Date: 2014 Nov 05
Research Org:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING

Other works cited in this record:

Arrester and a semiconductor circuit arrangement with a protection device including the same
patent, November 1983

Thyristor apparatus employing light-triggered thyristors
patent, August 1985

Protective circuitry for a thyristor
patent, March 1987

Thyristor valve with improved gate pulse generating scheme
patent, August 1990

Protection system for thyristor valve having first and second reverse voltage detection circuits
patent, September 1995

Apparatus for protection of power-electronics in series compensating systems
patent, February 2000

Device for supervising a high voltage converter station
patent, March 2001

Device for short-circuiting two electric lines for reducing a voltage differential
patent, April 2007

Method and system for architecture, control, and protection systems of modular stacked direct current subsea power system
patent, November 2015

DC high power distribution assembly
patent-application, July 2008

Safety Switching Device With Power Supply
patent-application, December 2014

Method And System For Architecture, Control, And Protection Systems Of Modular Stacked Direct Current Subsea Power System
patent-application, March 2015

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

Similar records in DOepatents and OSTI.GOV collections: