STARTING INHIBIT SCHEME FOR AN HVDC CONVERTER

A high-voltage converter comprises a plurality of electric valves interconnected in a bridge configuration between a-c and d-c electric power conductors and means for cyclically firing the valves in a normal sequence. To stop the converter its firing means is blocked, and for subsequently restarting...

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Bibliographische Detailangaben
1. Verfasser:	DEMAREST D,US
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	A high-voltage converter comprises a plurality of electric valves interconnected in a bridge configuration between a-c and d-c electric power conductors and means for cyclically firing the valves in a normal sequence. To stop the converter its firing means is blocked, and for subsequently restarting the converter, starting means is operative to disable the blocking means. Means is provided for inhibiting such operation of the starting means if the magnitude of voltage across the a-c conductors is under a predetermined limit or if the magnitude of current in the d-c conductors is over a predetermined limit, thereby avoiding restarts under conditions which are likely to result in an immediate commutation failure.