公开(公告)号：EP3113311A4

公开(公告)日：2017-10-04

申请号：EP14883640

申请日：2014-05-04

申请人： NR ELECTRIC CO LTD ,  NR ELECTRIC ENG CO LTD

发明人： CAO DONGMING ,  XIE YEYUAN ,  SHAO ZHENXIA ,  LU YU ,  LI MIN ,  LU HAIBIN ,  LI HAIYING

IPC分类号： H02H3/087 ,  H02H7/10 ,  H02H7/122 ,  H02H7/125 ,  H02H7/127 ,  H02M1/32 ,  H02M7/217 ,  H02M7/483 ,  H05K7/20

CPC分类号： H02H3/202 ,  H02H7/10 ,  H02H7/1227 ,  H02H7/1252 ,  H02H7/1257 ,  H02H7/127 ,  H02M1/32 ,  H02M7/2173 ,  H02M2007/4835 ,  H05K7/20927

摘要： The present invention discloses a direct-current power transmission protection device, including a resistor unit and a bidirectional circulation current switch unit, and the resistor unit and the bidirectional circulation current switch unit being connected in parallel to form the protection device, where at least one resistor is cascaded to form the resistor unit, and at least one bidirectional circulation current switch is cascaded to form the bidirectional circulation current switch unit. In addition, the present invention also provides a converter including the protection device, and at least one protection device is connected in series in each phase unit. The present invention provides the protection device, the converter and a protection method for flexible direct-current power transmission, which can rapidly and effectively suppress direct-current short circuit current and damp current oscillation, and not only can better protect equipment safety, but also can greatly shorten fault current attenuation time, thus shortening direct-current shutdown time and further decreasing economic loss and system destabilization risk caused by shutdown to the max. Moreover, the protection device is structurally simple and low in cost, and has good implementability and economic efficiency.

摘要翻译： 本发明公开了一种直流输电保护装置，包括电阻单元和双向环流开关单元，所述电阻单元和所述双向环流开关单元并联连接形成保护装置，其中至少一个 电阻串联形成电阻单元，至少一个双向环流开关级联形成双向环流开关单元。 此外，本发明还提供一种包括保护装置的转换器，并且每个相位单元中至少一个保护装置串联连接。 本发明提供了一种能够快速有效抑制直流短路电流和潮湿电流振荡的柔性直流输电保护装置，变流器及保护方法，不仅能够更好地保护设备的安全，而且 可以大大缩短故障电流衰减时间，缩短直流关机时间，进一步降低关机造成的经济损失和系统失稳风险。 而且，该保护装置结构简单，成本低廉，具有良好的可实施性和经济性。