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    METHOD AND ARRANGEMENT FOR FACILITATING CLEARING OF A POLE FAULT AND ISOLATION OF A FAULTED POLE IN A POWER TRANSMISSION SYSTEM
    1.
    发明公开
    METHOD AND ARRANGEMENT FOR FACILITATING CLEARING OF A POLE FAULT AND ISOLATION OF A FAULTED POLE IN A POWER TRANSMISSION SYSTEM 有权

    公开(公告)号：EP3363092A1

    公开(公告)日：2018-08-22

    申请号：EP15778934.8

    申请日：2015-10-12

    申请人： ABB Schweiz AG

    发明人： NYBERG, Sören ,  JIA, Yifan ,  JIANG-HÄFNER, Ying

    IPC分类号： H02J3/36 ,  H02M1/32 ,  H02H7/10 ,  H02H7/26

    CPC分类号： H02H7/1203 ,  H02H3/063 ,  H02J3/36 ,  H02M1/32 ,  H02M2001/325 ,  Y02E60/60

    摘要： A control unit rod interface arrangement couples between AC and DC power systems. The interface includes at least two poles for coupling between the DC and AC power systems. Each of the poles includes a converter for conversion between AC and DC power. If a fault has occurred in one of the poles, a transient current, or fault current, may flow through a neutral bus line connected to the pole, the pole's converter and the location of the fault in the pole. Such a transient or fault current should preferably be damped out as quickly as possible, after which the pole may be electrically isolated from the other components of the interface arrangement. Such a transient or fault current may be damped out relatively quickly by opening of a neutral bus switching element of the neutral bus line connected to the pole after the converter has entered a blocking mode and a circuit breaker at the AC side of the converter has been opened so as to effect discontinuation of flow of current between the AC side of the converter and the AC power system.

    CHANGE OF CURRENT RETURN PATH IN A BIPOLE POWER TRANSMISSION SYSTEM
    4.
    发明公开
    CHANGE OF CURRENT RETURN PATH IN A BIPOLE POWER TRANSMISSION SYSTEM 审中-公开
    Bipole输电系统当前回路的变化

    公开(公告)号：EP3298672A1

    公开(公告)日：2018-03-28

    申请号：EP15723229.9

    申请日：2015-05-18

    申请人： ABB Schweiz AG

    发明人： HOLMGREN, Tommy ,  SHEARER, David ,  SOBRINHO, Felipe ,  AVILA, Hector-Armando ,  BJÖRKLUND, Per-Erik ,  NYBERG, Sören

    IPC分类号： H02J3/36

    CPC分类号： H02J3/36 ,  H02J1/06 ,  H02M7/7575 ,  Y02E60/60

    摘要： An arrangement for changing current return path in a bipole direct current power transmission system includes a converter station having an active and a passive converter connected in series between an active and a passive pole line via a first neutral bus, a metallic return transfer switch in an electrode line, a ground return transfer switch in a current redirecting path between the passive pole line and the neutral bus and a control unit which in case of change to the passive pole line for providing a return current path is configured to, upon control of power related to the active converter from steady-state to zero, close the ground return transfer switch and thereafter open the metallic return transfer switch, whereupon power related to the active converter may be controlled back to steady state.