公开(公告)号：US20020008982A1

公开(公告)日：2002-01-24

申请号：US09871893

申请日：2001-06-04

Applicant: ABB AB

Inventor： Ying Jiang-Hafner

IPC: H02M005/00

CPC classification number: H02M7/7575 ,  H02J3/36 ,  Y02E60/60

Abstract: A converter station (STN1, STN2) having a voltage source converter (CON1, CON2) is coupled between a direct current link (W1, W2) and an alternating current network (N1, N2) in a high voltage direct current transmission system. A control system (CTRL1, CTRL2) for the converter station has means for control of active power flow (P) between the direct current link and the alternating current network by influencing the phase displacement (null) between a bus voltage (UL1, UL2, UL) in the alternating current network and a bridge voltage (UV1, UV2, UV) of the voltage source converter. The control system comprises detection means (48) for generation of a phase change order signal (PCO) in response to an indication of an abnormal voltage condition at the direct current link, and means (49) for influencing the phase position of the bridge voltage in response to said phase change order signal, so as to ensure that the phase displacement between the bridge voltage and the bus voltage will result in an active power flow from the direct current link to the alternating current network.

Abstract translation: 具有电压源转换器（CON1，CON2）的转换站（STN1，STN2）耦合在高压直流传输系统中的直流连接（W1，W2）和交流网络（N1，N2）之间。 用于转换器站的控制系统（CTRL1，CTRL2）具有用于通过影响总线电压（UL1，UL2，...）之间的相位位移（γ）来控制直流链路和交流网络之间的有功功率流（P）的装置， UL）和电压源转换器的桥电压（UV1，UV2，UV）。 所述控制系统包括用于响应于所述直流连杆处的异常电压状态的指示而产生相变顺序信号（PCO）的检测装置（48），以及用于影响所述桥电压的相位位置的装置（49） 响应于所述相变顺序信号，以确保桥电压和总线电压之间的相位偏移将导致从直流链路到交流网络的有功功率流。