CONTROL DEVICE FOR RECTIFIER STATIONS IN A HIGH-VOLTAGE DC TRANSMISSION SYSTEM

摘要

A control device for rectifier stations (5, 6) in a high-voltage DC transmission system (1) has a rectifier drive unit (12) and an inverter drive unit (13) for driving power rectifier stations that are working either as a rectifier (5) or as an inverter (6). The trigger angles for the rectifier (5) or for the inverter (6) can be adjusted and regulated by means of the rectifier drive unit (12) and the inverter drive unit (13) respectively. Placed between the rectifier drive unit (12) and the inverter drive unit (13) is a delay element (20) with which the start time for regulating the trigger angle for the inverter (6) relative to the start time for regulating the trigger angle for the rectifier (5) can be delayed by a prespecified delay time (Δt). Because of less mutual interaction of the trigger angle control processes, a relatively faster transition from an initial operating state into a new stationary state results.