Siemens to supply mobile substations to Saudi Arabian National grid

Siemens has announced that it has got an order to supply two mobile substations to National Grid SA. Siemens has combined its existing innovative mobile substation modules together to design and manufacture two 380kV mobile substations as per specifications able to fit and suit in any network area of the kingdom.

With a voltage of 380 kilovolts (kV) and a power capacity of up to 502 MVA each, the two substations are the most powerful ever built on a single feeder configuration. One substation contains three single-phase autotransformers with a capacity of 167.3 MVA each, which makes them the largest transformers for mobile substations ever built at Siemens.

Siemens’ portable power solutions come fully preconfigured and tested as plug-and-play substations that can be connected to the grid by overhead line or insulated cables. The modules contain all the necessary components for a complete substation: power transformers, GIS switchgears, MV/HV cable drums, protection and control systems, and auxiliary power supplies. They are available in several modular configurations to meet each customer’s needs. One of the core components of the substation is the transformer, which is very efficient as well as extremely compact designed in order to meet the dimension requirement of the mobile substation. This is proof that the Siemens grid resilience concept is a real first aid kit for emergency and bypass situations. Another core component is the switchgear, which need to combine the challenge of being entirely pre-assembled for easy installation and also able to withstand the mechanical stresses of transportation. This is made possible by the Siemens design and engineering of the gas-insulated switchgear and the supporting trailer as a single system.

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