Gas-insulated DC Switchgear (DC GIS)

Maximum performance at minimum space

Space limitations are an issue with numerous new applications for HVDC transmission. That’s why Siemens Energy has broken new ground in insulation technology to make one of the most space-saving technologies in HV power transmission available for HVDC systems: gas-insulated switchgear (GIS). Siemens Energy DC GIS are based on Siemens Energy’s proven 8DQ1 switchgear technology. The encapsulated, compact, and modular gas-insulated switchgear for DC voltages of up to ±550 kV and currents of up to 5 kA reduce space requirements for HVDC switchyards considerably, boast outstanding climatic resistance. Furthermore, a gas-insulated substation can even be installed underground or commissioned in prefabricated container modules for further space and time savings as well as minimum visual impact.

DC GIS in 132 seconds!

DC GIS is your answer to any size, climate, and time challenge

Modular Siemens Energy DC GIS help reduce the space requirements for HVDC systems, ensure safe and reliable operation even in demanding onshore and offshore applications, and enable quick project implementation.

Space-savings of up to 95 %

Compared with technically equivalent air-insulated switchgear, DC GIS require up to 95 percent less space.

Outstanding climatic resistance

DC GIS operate safely and reliably onshore and offshore in the temperature range of -30°C to + 50°C and even under severe conditions such as polluted and aggressive atmosphere.

Containerized arrangements available

DC GIS can be commissioned in prefabricated container modules to reduce environmental impact as well as local erection and commissioning efforts.

Underground installation possible

The encapsulated, compact, and modular DC GIS can be installed underground to prevent visibility of and public access to the gas-insulated substation.

Trendsetting technology put into practice

Siemens Energy DC GIS is a fairly new technology, but thanks to its great advantages it has already been included in the design of future HVDC projects that are being planned at the moment.

Mutual type testing with Sumitomo/ Suedkabel

Collaborative tests of Sumitomo, Suedkabel and Siemens Energy showed the conformity of the 525 kV DC cable system from Sumitomo and Suedkabel and the DC GIS interface from Siemens Energy in accordance with CIGRE TB496.
 

Read more:

https://global-sei.com/company/press/2020/08/prs081.html

Mutual type testing with Nexans

Mutual tests of Nexans 525 kV DC cable system and Siemens Energy DC GIS interface has been successfully completed according to CIGRE TB496.
 

Read more:

https://www.nexans.com/newsroom/news/details/2021/04/Nexans-successfully-achieves-electrical-Type-Test-for-525-kV-DC-GIS-cable-sealing-end.html

Interview with T&D

High-voltage direct current (HVDC) transmission systems are growing in importance as the radical energy transition alters the landscape for generation, transmission, and distribution of electricity. An interview to the potential of DC GIS within HVDC transmission systems.

Read more:

https://www.tdworld.com/digital-innovations/hvdc/article/21143576/spacesaving-dc-gis-supports-growth-of-hvdc-connection

HVDC GIS - Maximizing performance with a minimum footprint

Integration of renewable energy sources often requires high-voltage direct current (HVDC) transmisson - or as some say, “electrical superhighways”. About the benefits of gas-insulated DC systems within HVDC transmission systems.

Read more:

https://energynorthern.com/2020/10/06/siemens-energys-hvdc-gis-maximising-performance-with-a-minimum-footprint/

Learn more about DC GIS


Download our DC GIS brochure to gain an overview of all technical details and possible applications. In addition the infographic provides all Siemens Energy DC GIS references at a glance.

Brochures

DC GIS Brochure
PDF (1 MB)

Infographic

DC GIS Infographic
PDF (812 KB)
Customer Support Center
SIEMENS ENERGY GLOBAL GMBH & CO. KG

Otto-Hahn-Ring 6
81739 Munich
Germany

Mutual type testing with Sumitomo/ Suedkabel

Collaborative tests of Sumitomo, Suedkabel and Siemens Energy showed the conformity of the 525 kV DC cable system from Sumitomo and Suedkabel and the DC GIS interface from Siemens Energy in accordance with CIGRE TB496.

Read more:

https://global-sei.com/company/press/2020/08/prs081.html

Mutual type testing with Nexans

Mutual tests of Nexans 525 kV DC cable system and Siemens Energy DC GIS interface has been successfully completed according to CIGRE TB496.

Read more:

https://www.nexans.com/newsroom/news/details/2021/04/Nexans-successfully-achieves-electrical-Type-Test-for-525-kV-DC-GIS-cable-sealing-end.html

Interview with T&D

High-voltage direct current (HVDC) transmission systems are growing in importance as the radical energy transition alters the landscape for generation, transmission, and distribution of electricity. An interview to the potential of DC GIS within HVDC transmission systems.

Read more:

https://www.tdworld.com/digital-innovations/hvdc/article/21143576/spacesaving-dc-gis-supports-growth-of-hvdc-connection

HVDC GIS - Maximizing performance with a minimum footprint

Integration of renewable energy sources often requires high-voltage direct current (HVDC) transmisson - or as some say, “electrical superhighways”. About the benefits of gas-insulated DC systems within HVDC transmission systems.

Read more:

https://energynorthern.com/2020/10/06/siemens-energys-hvdc-gis-maximising-performance-with-a-minimum-footprint/