Patent ID: 7321500

Claim:
A voltage source converter for high power application, comprising: a plurality of valves, each valve comprising a plurality of extinguishable semiconducting elements, and a 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.