The transformation of electricity – including air-insulated, gas-insulated and converter substations is a longstanding core business for Omexom and has been so for over 100 years.
As an EPC contractor, Omexom delivers value-added solutions during the complete life-cycle of substations.
Our DNA as a local contractor with global capabilities allow us to support our customers for all sizes of project and any kind of project complexity. Our independence from material manufacturers guarantees a perfect fit between the needs and the solution provided by our highly skilled teams of engineers.
Our expertise covers all steps of project development, from basic design, detailed design, procurement, construction, commissioning, maintenance and operation.

We have EPC references in HVDC Substations, AC Substations up to 500 kV in air insulated and up to 400 kV in gas insulated

MV & LV substations

Design, construction & maintenance

For medium and low voltage substations, Omexom supports its client throught administrative procedures, provides design studies and ensure civil works, lifting and implementation. Omexom is expert regarding connection, testing, commissioning and maintenance.

We work with various substations systems, including air and gas insulated systems, and indoor modular substations.

We provide a range of technical services, including feasibility studies, diagnosis, switchgear repair, power transformer refurbishment, and on-load tap changer maintenance.

HVDC Substations

High voltage direct current

At Omexom, we specialise in helping HVDC converter stations meet their energy transition challenges. We design, construct, and maintain all HVDC substation equipment, including converters, capacitors, transformers and specific devices. We also have the expertise to deliver transport infrastructures.

Digitalization programs

Support our customers across all their assets

We are also able to support our customers in defining and upscaling digitalization programs across all their assets including:

  • digital substations,
  • substation digital twins,
  • fault localization software,
  • remote monitoring and control solutions,
  • substation security, cybersecurity,
  • safety programs for isolated workers

And many other solutions to improve the reliability of their network, maintenance costs, the safety conditions of their workers and the environmental impact of their substations.

News related to Substations

02/06/2022 Circular economy, Environment, Finland, Omexom Green Story, Substations

Episode 9 – Omexom Green Story: Recovering transformer parts and oil in substations

This episode of the Green Story takes us to Hikiä, Finland, where the local Omexom teams have developed a process to recover transformer parts and oil. In line with one of the three key areas of VINCI Energies’ environmental ambition, Omexom in Finland reduces waste production by reusing transformer oil and spare parts and recycling any leftover materials. Thereby, the team does not only preserve the environment, but has created a service that provides substantial advantages for their customers. Let’s have a look!
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05/05/2022 Omexom Green Story, Substations, The Netherlands

Episode 8 – Omexom Green Story: Minimizing the impact of substation construction on biodiversity

This episode of the Omexom Green Story takes us to Eemshaven, in the Netherlands. Here, our local business unit has contributed to sowing 25 000 m2 of wildflowers native to the region around a new substation to offset the impact of the infrastructure on the local habitat. A bee hotel and an electric vehicle charging point on site further highlight the intention of rethinking our operations to minimiz the impact of substation construction ob biodiversity.
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09/02/2022 Germany, High voltage, Offshore wind, Substations, The Netherlands, Wind

Dutch and German Omexom teams collaborate on Gemini Wind Park in the Netherlands

The Gemini Wind Park is one of largest offshore wind parks in Europe. Located in the North Sea, 85 km off the coast of the Netherlands, it became operational in 2017. With a rated capacity of 600 megawatts, Gemini generates renewable electricity for 1.5 million people while reducing CO₂ emissions by 1.25 million tons per year. Built between 2014 and 2017, the wind park will provide clean energy for decades to come. To make sure that Gemini performs at its best, operations and maintenance are a key part of the project.
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15/11/2021 High voltage, Substations, Sweden

Omexom in Sweden is awarded a contract to operate and maintain the substations supplying the Stockholm metro

Omexom in Sweden was awarded a new contract by Storstockholms Lokaltrafik – the public transport authority for the Stockholm region – to operate and maintain the high-voltage substations that supply the Stockholm metro and the cities of Tvärbanan, Nockebybanan, Lidingöbanan, Saltsjöbanan, Roslagsbanan and Spårväg. With this new assignment, Omexom continues to ensure the power supply to SL's rail traffic.
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27/09/2021 Power, Substations, Sweden

Six new contracts to secure electricity supply in Sweden

Omexom continues to secure the electricity supply in Sweden with six new contracts.
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15/09/2021 Finland, Substations

Renewing Kangasala substation in Finland

Omexom in Finland is currently operating in Kangasala. Its mission consists of renewing the 400kV switchyard equipment.
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25/06/2021 Energy Transition, Offshore wind, Substations, The Netherlands

Omexom replaces nine circuit breakers at Borssele 150kV HV substation

The Netherlands' largest offshore wind farm is currently under construction off the coast of Zeeland. A total of 173 wind turbines with a combined capacity of 1.5 gigawatts of green energy will be installed in the region.
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01/06/2021 Distribution, High voltage, Innovation, Low voltage, Medium voltage, Overhead distribution lines, Overhead transmission lines, Senegal, Substations, Underground distribution lines, Underground transmission lines

Omexom completes its first full digital 225kV high voltage substation

On May 27th, 2021, Omexom teams in Senegal and Morocco commissioned the very first full digital 225 kV high voltage substation on the african continent.
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23/02/2021 Substations, The Netherlands

Installation of GIS equipment and transformers in two large high-voltage offshore substations

On behalf of HSM Offshore, Omexom in the Netherlands was commissioned to install GIS (Gas Insulated Switchgear) equipment and 66kV and 220kV transformers in two large high-voltage offshore substations.
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18/02/2021 Substations, Sweden

Upgrading Umea’s power grid

Umeå's growth, located in the north-east of Sweden, results in strong demands on a sustainable and reliable power grid. To address this need, the grid owner, Umea Energi Elnat AB, meets this with the project "Spänningshöjning", a comprehensive upgrade of the power network in the region during the period 2015 to 2024.
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