Electric cars, solar panels and wind turbines strain the grid.

For many years, electricity flowed one way: from large, central power plants through the transmission network, through the distribution network and out to the consumer. This model is changing as solar cells, wind turbines, electric cars and heat pumps really gain ground in the Danish energy system.

§The current changes direction

When many households in the same area have solar cells on the roof, situations can arise where power on sunny days flows the opposite way—from the consumer network and into the distribution network—because local production exceeds local consumption. This places completely new demands on how grid companies monitor and control the load compared to the classic one-way system.

• 01Decentralized production from solar cells and smaller wind turbines is connected locally to the distribution network
• 02The load can vary greatly hour by hour depending on sun and wind
• 03The power companies must be able to handle electricity in both directions safely

§Electric cars and heat pumps increase the load.

At the same time electrification of transport and heating puts new pressure on the grid from the other side. If many electric cars charge in the same residential area at the same time in the evening it can create peak loads on the local low-voltage network. The same applies to heat pumps which in cold periods can draw significantly more power than the older network was originally designed for.

§Network expansion and new competencies

Overall, the green transition means that the distribution network in many places needs to be expanded and strengthened — and that operation becomes more complex to monitor. For you as a supply operator it means that work tasks gradually shift towards more monitoring of a network with two current directions, connection of decentralised generation, and understanding how Power-to-X systems and other new energy technologies are safely connected to the system.

§A politically driven development

The development is not random. With the Climate Act of 2020 Denmark has a legally binding target to reduce emissions of greenhouse gases by 70 percent in 2030 compared to 1990 and a large part of the way there goes through electrification of transport heating and parts of industry. The political goal is directly translated into more tasks for the utilities and thus for the utility operators who must build monitor and maintain the network electrification runs on.

For you considering the education it means you are entering a trade where the demand for labour is not only driven by normal growth but by a politically determined goal that the entire society is working towards over the coming years.

§The electric car as part of the solution.

Electric cars are not only a challenge for the grid — they can also become part of the solution. With technology that allows an electric car's battery to supply power back to the grid during high consumption periods (often called vehicle-to-grid), many small batteries could in principle function as a distributed reserve storage that helps smooth out loads. That type of technology is still under development and deployment, but it points to how the grid operator's future work will increasingly be about managing a grid with many small, flexible sources instead of a few large and predictable ones.

Overall, it means that the trade becomes more technically complex over time, while the fundamental principles — safe disconnection, correct dimensioning and systematic troubleshooting — remain the same. This makes the education a solid foundation, regardless of where technology moves during your career.

“The more Denmark electrifies transport, heating and industry, the more crucial become the hands that can keep a more complex grid running.”