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Method and device for the operation of a HVDC transmission system with advanced phase control of the converters
Method and device for the operation of a HVDC transmission system with advanced phase control of the converters
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机译:用于具有变流器的高级相位控制的高压直流输电系统的运行方法和装置
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摘要
1. A method of controlling or regulating power converters, governed by a network clock signal in an EHT d.c. link where in normal operation : - the first converter (SRA) connected to a first a.c. voltage network in a first station (A), serving as rectifier, impresses an EHT d.c. current (id ) onto the EHT d.c. ; and - the second converter (SRB) connected to a second a.c. voltage network in a second station (B), serving as inverse rectifier, determines the EHT d.c. voltage ; characterised in that in the second station (B) a model disturbance variable (DELTA xBv or UdB ), which determines the inductive d.c. voltage drop (idB . dxB ) is formed from the EHT d.c. current (id ) and the second a.c. voltage (UB ) and is added to a control signal (DELTA xB , DELTA xA ) in one of the stations (B or A) which is predetermined by control or regulation and governs a preset (gamma B-* or gamma A-* ), such that the control voltage formed as a result of the addition determines the control angle (alpha B or alpha A ) of this first station (B or A) as the sum of the preset angle (gamma B-* or gamma A-* ) and of an advance control angle (alpha Bv or alpha Av ) governed by the model disturbance variable (Fig. 3).
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