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Electric power converter

  • US 7,321,500 B2
  • Filed: 04/28/2006
  • Issued: 01/22/2008
  • Est. Priority Date: 04/29/2005
  • Status: Active Grant
First Claim
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1. A voltage source converter for high power application, comprising:

  • a plurality of valves, each valve comprising a plurality of extinguishable semiconducting elements, anda valve control unit configured to control the voltage source converter via an executing pulse-width modulation signal,wherein the valve control unit comprises a first control unit, a first pulse-width modulator for providing a first pulse-width modulation signal according to a fast dynamic control, a second control unit, a second pulse-width modulator for providing a second pulse-width modulation signal according to a slow dynamic control, a mode detector configured to detect a first mode of operation of the voltage source converter and a second mode of operation of the voltage source converter, and a selector connected to the first pulse-width modulator and second pulse-width modulator for selecting in dependence of the mode detector, the second pulse width modulation signal during the first mode of operation and the first pulse width modulation signal during a second mode of operation as the executing pulse-width modulation signal.

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