High-voltage substations

The various types of switchgear that are available for high-voltage substations make it possible to provide flexible, individual solutions. Here’s an overview of the different kinds of high-voltage substations and their main advantages. 

• 75 Approx. years of experience
• 100+ Countries worldwide
• 8,000+ Projects in total

Comprehensive expertise and many decades of practical experience are at the heart of all Siemens Energy AIS and GIS high-voltage substations. They serve even the highest voltage levels and are used in the most demanding environments.

Public Service Electric and Gas Company SE&G | Bergen substation, USA   This project broke records in terms of scale and performance. Gas-insulated single-pole bus ducts with a total length of 2,700 meters connect the GIS accommodated in the 85-meter-long switchgear building with the air-insulated part of the substation. The 245 kV breakers were the world’s first of its kind to switch a short-circuit current of 80 kA. The project included engineering, design, supply and delivery, commissioning, all associated control and protection equipment, and buildings for the substation. This projects upgraded the existing 138 kV lines to 230 kilovolts. The GIS helps provide additional load capacity and enhances safety and reliability by redundancy in the system design and earthquake resistance.

Statnett SF energy system operator | Sogndal substation, Norway  Sogndal substation is a key node point in Western Norway. It strengthens the Western Norway power grid, increases the electricity transmission capacity, and provides voltage support by installation of a Static Var Compensator (SVC). As a result, it ensures an additional feed-in of electricity and a redundancy capacity provided by wind and small hydro power plants. Siemens Energy was responsible for the planning, delivery, and installation of nine bays for a 420 kV AIS, in  double bus, two breaker design, three bays for a 145 kV AIS, in single bus, single breaker design. Furthermore the contract was comprising the connection of the existing 300 kV transmission lines with the new 420 kV substation and the design, delivery, and installation of a +/- 250 MVAr Static Var Compensator (SVC).

Siemens Energy high-voltage substations incorporate the strong performance of one of the world’s leading engineering companies and supplier of power transmission products, solutions, and services. If you want to learn more about the advantages of Siemens Energy's time-tested, proven solutions and to delve into all technical details, simply contact the Siemens Energy Customer Support Center and have your individual questions answered directly by our experts.