| 摘要 |
A voltage source converter (CON) for high power application containing a plurality of valves, each valve containing a plurality of extinguishable semiconducting elements, and a valve control unit (CTRL) containing computer means and a pulse-width modulator providing an executing control signal (FP) for controlling the semiconducting elements, The valve control unit comprises a first control (11) containing a first pulse-width modulator (PWM 1 ) for providing a first pulse-width modulation signal (FP T ), a second control (12) containing a second pulse-width modulator (PWM 2 ) for providing, a second pulse-width modulation signal (FP S ), a mode detector (14), and a selector (13) connected to the first and second pulse-width modulator for selecting in dependence of the mode detector the executing pulse-width modulation signal (FP). |
