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公开(公告)号：EP3251189B1
公开(公告)日：2018-10-10
申请号：EP15701811.0
申请日：2015-01-30
Applicant: ABB Schweiz AG
Inventor： MAJUMDER, Ritwik , BERGGREN, Bertil , VELOTTO, Giovanni , JONSSON, Tomas Uno , AUDDY, Soubhik , JOSEFSSON, Jenny
CPC classification number: H02H7/22 , H01H9/542 , H01H33/596 , H02B1/24 , H02H7/268 , H02J1/00 , H02J1/10
Abstract: The invention concerns a switchyard for interconnecting direct current power networks and a direct current power transmission system comprising such a switchyard. The switchyard comprises a number of interconnected entities comprising at least two main circuit breakers and a number of transfer switches, where each network has two connections to the switchyard, at least one via a transfer switch, each main circuit breaker has four connections in the switchyard, two at each end of the main circuit breaker and at least one via a transfer switch, and each network is joined with every other network via a corresponding path through at least one main circuit breaker as well as via a corresponding path bypassing all main circuit breakers.
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公开(公告)号：EP3353881A1
公开(公告)日：2018-08-01
申请号：EP15767135.5
申请日：2015-09-21
Applicant: ABB Schweiz AG
Inventor： JONSSON, Tomas Uno
Abstract: A multilevel converter includes a first and a second converter block series-connected between two DC terminals and a chopper circuit between the blocks. Each block includes a number of valve arm strings, each including an upper and a lower valve arm and a number of converter cells. A midpoint between the upper and lower arm of a string of the first block is connected to a corresponding primary AC terminal and a midpoint between the upper and lower arm of a corresponding string of the second block is connected to a corresponding secondary AC terminal. The chopper circuit comprises a power dissipating element in parallel with a circuit breaker.
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公开(公告)号：EP3353881B1
公开(公告)日：2019-11-27
申请号：EP15767135.5
申请日：2015-09-21
Applicant: ABB Schweiz AG
Inventor： JONSSON, Tomas Uno
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