公开(公告)号：US20190267198A1

公开(公告)日：2019-08-29

申请号：US15796838

申请日：2017-10-29

Applicant: ABB Schweiz AG

Inventor： Xiaobo Yang ,  Bernt Bergdahl ,  Chunming Yuan ,  Dawei Yao ,  Chao Yang

IPC: H01H9/54 ,  H02J3/36 ,  H01H33/59

Abstract: An objective of the invention is to provide a bidirectional power valve for current occurring in a high voltage DC conductor, control method therefor, hybrid multi-terminal HVDC System using the same. The bidirectional power valve includes a first power diode arrangement of a first conducting direction, a second power diode arrangement of a second conducting direction; a mechanical disconnector, being connected with the second power diode arrangement in series; wherein: the first power diode arrangement and the series-connected second power diode arrangement and the mechanical disconnector are connected in parallel; and the first conducting direction of the first power diode arrangement and the second conducting direction of the second power diode arrangement are opposite to each other. The current commutation and re-commutation can be achieved with less requirement of the timing accuracy of switching event which makes the usage of a mechanical disconnector and power diode feasible. This will then result in a significant reduction of cost and power transfer losses.