400 kV Himmeta substation construction a key node of Sweden’s NordSyd project

Sweden has launched a major upgrade of its transmission network through the ambitious NordSyd project, which will increase the national grid capacity from 7,300 MW to 10,000 MW. A key element of this project is the construction of the 400 kV Himmeta Substation, enabling efficient transmission of electricity from the north to the south of the country.

The project is being implemented in the settlement of Himmeta, located 50 kilometers west of Västerås, near an existing switchyard facility. As a new energy hub, the Himmeta Substation will enable voltage upgrading of the 220 kV transmission line between the Karlslund and Finsslätten substations.

Construction works started in October 2023, with completion expected in May 2025. The substation is part of a broader modernization plan for Sweden’s power infrastructure, ensuring higher grid resilience against future energy challenges and increasing loads caused by rising electricity demand.

• Substation voltage level: 400 kV
• Number of bays: 4 (two line bays and two transformer bays)
• Number of busbar systems: 2
• Location: Himmeta, 50 km west of Västerås
• Transmission capacity increase within the NordSyd project
• Implementation of SCADA systems for remote control and monitoring

• Integration into the existing transmission network to ensure safe capacity expansion
• Work performed in close proximity to an operational substation, with minimal disruption to system operation
• Coordination with Omexom, the project’s main contractor
• Deployment of advanced protection systems and SCADA solutions to ensure maximum substation efficiency
• Compliance with the latest EU energy standards, ensuring long-term sustainability and system efficiency

Elnos Group is responsible for:

• Complete electrical assembly works on the 400 kV switchyard
• Installation of protection and control systems
• Connection of the substation to the transmission network
• Testing and commissioning, in accordance with strict Swedish energy-efficiency standards
• Integration of the SCADA system enabling remote supervision and operational optimization

• Increase of Sweden’s transmission capacity from 7,300 MW to 10,000 MW, within the NordSyd project, in which Himmeta is the first of 35 substations to be constructed or reconstructed
• Enabling secure transmission of electricity from northern to southern Sweden
• Strengthening power-system stability through modernization of critical grid nodes
• Supporting Sweden’s energy transition toward sustainable and stable electricity sources
• Application of advanced technologies and innovative solutions to reduce network losses

The NordSyd project, together with the construction of the Himmeta Substation, represents a cornerstone infrastructure investment in strengthening Sweden’s power transmission system. Through this project, Elnos Group once again confirms its expertise and leading role in delivering some of Europe’s most complex power-engineering projects.