Method and device for starting up a high-voltage direct current transmission system for normal operation

摘要

1. A method of starting-up the normal operation of an EHT d. c. link for the transmission of power between two a. c. voltage networks (NA, NB), where, in normal operation, in a first station (station A) a network-clock-controlled first converter (1A) operates as a rectifier to impress onto the EHT d.c. link a predetermined d. c. current (idA ), withdrawn from the first a. c. voltage network (NA), and in a second station (station B) a network-clock-controlled second converter (1B) which leads into the second a. c. voltage network (NB) and operates as an inverter determines the d. c. voltage (UdB ) of the EHT d. c. link, and the production of a leading release signal (QA = 1 or QB = 1) in one of the two stations (station A or station B) whilst the first a. c. voltage network (NA or NB) connected to this one station is in the undisturbed state, causes normal operation to be started up in this station, characterised in that a) the leading release signal triggers the start of the network-clock-controlled normal operation of the one converter (1A or 1B) arranged in this first station, where a voltage surge is impressed upon the EHT d. c. link and the control angle (alpha A or alpha B ) of the first converter is increased to the control angle provided for normal operation ; and b) that in the other station (B or A) connected to the other a. c. voltage network, monitoring of the d. c. voltage-side electrical variables (dUdB /dt, didB /dt or dUdA /dt, didA /dt), when the influences of the voltage surge impressed by the first station occur causing a derived release signal (QB = 1 or QA = 1) to be formed which, in this other station, triggers the start-up of network-clock-controlled normal operation, where the control angle of the other converter arranged in this other station (B or A) is increased from a control angle of approximately 90 degrees to the control angle provided for stationary normal operation, in accordance with a ramp function adapted to the increase of the control angle of the first converter. (Fig. 16, Fig. 23 to 27).