Protection of a dynamic voltage restorer
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United States of America Patent
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-
Oct 14, 2003
Grant Date -
Jan 31, 2002
app pub date -
Jun 27, 2001
filing date -
Jun 30, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A short circuit within the dynamic voltage restorer (1) is immediately detected by a short circuit detection units (9) which permanently monitors currents and voltages in the voltage source converter (3) and energy storage capacitor bank (2). Upon detection a fast discharge of the capacitor bank (2) including firing of all available semiconductors of the voltage source converter (3) and distributing the resulting current stress as evenly as possible within the voltage source converter (3) is initiated. Instead of letting costly fuses interrupt the high short circuit currents, these currents are detected and evenly distributed within the converter.
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