LIKRIKTARSTATION FOR HOGSPEND LIKSTROMSOVERFORING

摘要

A rectifier station for high voltage direct current transmission includes a rectifier bridge with a control system. In order to limit the direct voltage of the station in the event of disturbances, the control system is provided with arrangements for sensing the direct voltage of the station and the derivative of such voltage. The arrangement supplies signals to limit the voltage increase of the station when the voltage and derivative exceed given values by increasing the delay angle of the station.