发明名称 |
Transmission system and a method for control thereof |
摘要 |
An HVDC transmission system including a rectifier station and an inverter station each having a series connection of at least two converters. A by-pass DC breaker is connected in parallel with each converter. A control device is adapted to deblock a blocked converter by starting to control the converter at high delay angle and gradually decreasing the delay angle until substantially all DC current flows through the converter and to then control the by-pass breaker to open at substantially zero current, and to stop the operation of a converter by controlling the converter at gradually increasing delay angle until the voltage across the converter is substantially zero and to then control the converter to be blocked by firing a by-pass pair thereof and to then control the by-pass breaker to close for taking over all the DC current when the voltage between a neutral bus and a pole of a transmission line between the stations is to be increased and reduced, respectively.
|
申请公布号 |
US8300435(B2) |
申请公布日期 |
2012.10.30 |
申请号 |
US20060161402 |
申请日期 |
2006.06.15 |
申请人 |
BJOERKLUND HANS;LUNGQVIST ROLF;ABB TECHNOLOGY LTD. |
发明人 |
BJOERKLUND HANS;LUNGQVIST ROLF |
分类号 |
H02J3/36;H02M5/45;H02M7/10 |
主分类号 |
H02J3/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|