Scalable switchyard for interconnecting direct current power networks

The invention concerns a switchyard for interconnecting direct current power networks (N1, N2, N3) 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 (MB1, MB2) and a number of transfer switches (TS1, TS2, TS3, TS4, TS5, TS6, TS7), wherein each network has two connections to the switchyard, at least one via a transfer switch (TSi, TS2, TS3, TS4, TS5, TS7), 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 (TS1, TS2, TS3, TS4, TS5), 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. 本发明涉及用于互连直流电力网络(N、N、N)的开关站和包括这种开关站的直流输电系统。开关站包括多个互连的实体，该多个互连的实体包括：至少两个主断路器(MB、MB)；和多个转接开关(TS、TS、TS、TS、TS、TS、TS)，其中，每个网络具有到开关站的两个连接，至少个连接经由转接开关(TS、TS、TS、TS、TS、TS)，每个