H - Electricity – 02 – M
Patent
H - Electricity
02
M
321/43, 321/94
H02M 7/155 (2006.01) H02M 7/757 (2006.01)
Patent
CA 1175902
INVENTORS: MICHAEL H?USLER and KARL-WERNER KANNGIESSER INVENTION: METHOD FOR PLACING INTO OPERATION A SERIES CONNECTED GROUP OF STATIC POWER CONVERTERS OF A HIGH VOLTAGE DIRECT-CURRENT TRANSMISSION INSTALLATION ABSTRACT OF THE DISCLOSURE In order to place into operation a group of power converters which are connected in series as concerns the direct-current mode and in parallel as concerns the alternating-current mode, of a power or current converter operating in a rectifying mode of a high-voltage direct- current transmission installation, the control pulses of the group of power converters to be placed into operation are set at a range of approximately 100 to 115 electrical degrees. The bypass or shunt switch of such group of power converters subsequently receives an opening command. The control pulses, after accomplishment of opening of the bypass or shunt switch are shifted in accordance with a predetermined linear ramp function in the rectifying range and thereafter the control pulses are delivered by means of a pole current regulator. The placement into operation of a power converter operating in the inverting mode is accomplished in a similar fashion. Reactive power swings or fluctuations between the network and the power converters are avoided.
380415
Hausler Michael
Kanngiesser Karl-Werner
Bbc Brown Boveri & Company Limited
Johnson & Hicks
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