Scalable switchyard for interconnecting direct current power networks

Patent metadata

Field	Value
Publication number	US-10122163-B2
Application number	US-201515542354-A
Country	US
Kind code	B2
Filing date	Jan 30, 2015
Priority date	Jan 30, 2015
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

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.

First claim

The invention claimed is:

1. A switchyard for interconnecting at least three direct current power networks, the switchyard comprising a number of interconnected entities comprising:
at least two main circuit breakers, and
a number of transfer switches,
wherein
each network has two connections to the switchyard, each provided via a transfer switch,
each main circuit breaker has four connections in the switchyard, two at each end of the main circuit breaker each provided 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,
thereby
each main circuit breaker is connected between two networks via two network interconnecting transfer switches, one on each side of the main circuit breaker, where there is at least one bypass branch in parallel with the main circuit breaker, which bypass branch comprises a bypass transfer switch and is connected between the two network interconnecting transfer switches, and
there is at least one circuit breaker interconnecting branch between the two circuit breakers and comprising a circuit breaker interconnecting transfer switch.

2. The switchyard according to claim 1 , wherein each network only has two connections to the switchyard and each main circuit breaker only has four connections in the switchyard.

3. The switchyard according to claim 1 , wherein a connection of one entity that is joined with a connection of another entity share transfer switch.

4. The switchyard according to claim 1 , wherein a first connection of a first network is joined with a first connection of a first main circuit breaker at a first end of the first circuit breaker.

5. The switchyard according to claim 4 , wherein a second connection of the first main circuit breaker at the first end is joined with a first connection of a second main circuit breaker at the first end of the second main circuit breaker.

6. The switchyard according to claim 5 , wherein a second connection of the first network is joined with a third connection of the first main circuit breaker at a second end of the first circuit breaker.

7. The switchyard according to claim 6 , wherein a fourth connection of the first main circuit breaker at the second end is joined with a first connection of a second network.

8. The switchyard according to claim 5 , wherein a first connection of a second network is joined with a third connection of the first main circuit breaker at a second end of the first circuit breaker and a second connection of the first network is joined with a second connection of the second network.

9. The switchyard according to claim 8 , wherein a fourth connection of the first main circuit breaker at the second end is joined with a second connection of the second main circuit breaker at the second end of the second main circuit breaker.

10. The switchyard according to claim 1 , wherein 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 when all main circuit breakers are operational.

11. A direct current power transmission system comprising a switchyard according to claim 1 .

12. The switchyard according to claim 2 , wherein a connection of one entity that is joined with a connection of another entity share transfer switch.

13. The switchyard according to claim 2 , wherein a first connection of a first network is joined with a first connection of a first main circuit breaker at a first end of the first circuit breaker.

14. The switchyard according to claim 3 , wherein a first connection of a first network is joined with a first connection of a first main circuit breaker at a first end of the first circuit breaker.

15. The switchyard according to claim 2 , wherein 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 when all main circuit breakers are operational.

16. The switchyard according to claim 3 , wherein 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 when all main circuit breakers are operational.

17. The switchyard according to claim 4 , wherein 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 when all main circuit breakers are operational.

18. The switchyard according to claim 5 , wherein 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 when all main circuit breakers are operational.

19. The switchyard according to claim 6 , wherein 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 when all main circuit breakers are operational.

20. The switchyard according to claim 7 , wherein 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 when all main circuit breakers are operational.

Assignees

• Abb Schweiz Ag

Inventors

• Majumder Ritwik
• Berggren Bertil
• Velotto Giovanni
• Jonsson Tomas
• Auddy Soubhik
• Josefsson Jenny

Classifications

• H02B1/24

  Circuit arrangements for boards or switchyards · CPC title

• H01H33/596

  for interrupting DC · CPC title

• H01H9/542

  Contacts shunted by static switch means · CPC title

• H02H7/268

  for DC systems · CPC title

• H02J1/10 Primary

  Parallel operation of DC sources · CPC title