公开(公告)号：US20170207630A1

公开(公告)日：2017-07-20

申请号：US15504323

申请日：2014-04-18

申请人： NR ELECTRIC CO., LTD ,  NR ENGINEERING CO., LTD

发明人： Yunlong DONG ,  Gang LI ,  Jie TIAN ,  Nannan WANG ,  Chao LIU

IPC分类号： H02J3/36 ,  H02M5/42

CPC分类号： H02J3/36 ,  H02J1/10 ,  H02M5/42 ,  Y02E40/16 ,  Y02E60/60

摘要： A method for incorporating a non-operating station into an operating system in a multi-terminal flexible DC transmission system. The method includes selecting a STATCOM operation mode for the non-operating station; opening a bypass switch at an AC side and connecting a charging resistor to an AC line; closing the AC incoming-line breaker, and pre-charging a converter valve of the non-operating station through the resistor; closing the bypass switch after the pre-charging; selecting a constant-DC voltage control mode for the non-operating station to perform deblocking; controlling the difference between a non-operating station DC voltage value and an operating system direct voltage value to be within an allowable range; closing the pole-connection device at the DC side of a converter of the non-operating station; and switching the non-operating station from the STATCOM operation mode to a DC operation mode, and incorporating the non-operating station into the operating system.