Finland’s electricity demand is outpacing the integration of new wind power.

Gridify’s vision

1. Demand can grow faster than new wind is completed

Finland’s strength has been a power system in which electricity has been internationally competitive, reliable and largely low-carbon. That system is now changing fast. New electricity-using sites are larger than before, and their power need can be substantial.

According to Fingrid, the stated final scale of data-centre projects is almost 5 gigawatts, including projects connecting to distribution networks. Electric boilers under construction and in use exceed 3 gigawatts. Not every project will be realised in full, but together they show the direction: Finland is expected to use significantly more electricity than today.

At the same time new generation grows mainly through wind. For Finland’s energy system that is necessary and, over the long run, a strongly positive development. The problem is not the direction of wind, but its timetable relative to demand growth.

A data centre, electric boiler or production line can be built and brought into use in a few years. Developing a wind project, permitting it, reinforcing the grid and constructing it often take longer. If demand is ready before generation, the system enters a period in which consumption grows faster than new supply.

2. Electrical power is not the same as annual energy

Finland’s power system is not only about whether enough electrical energy is produced over a year. What also matters is whether power is available at the moment demand needs it.

Wind can produce a large amount of electricity over a year, but output varies with the weather. Even a large new wind fleet does not help fully at a moment when there is little wind and demand is high.

That is the central difference between energy and power. Energy is how much electricity is produced over a period. Power is how much is available right now. For industry, data centres and other large users, power adequacy can decide whether a new investment can be delivered on the planned timetable.

3. Wind growth needs flexibility alongside it

The more generation is weather-dependent, the more the system’s flexibility matters. Flexibility is needed when there is a lot of wind and little demand. It is also needed when demand is high and the wind is low.

Flexibility can mean energy storage, controllable electricity use, thermal storage, electric boilers, dispatchable generation, gas turbines, engine power plants, hydro, demand response or transmission capacity. No single technology solves everything, but without flexible capacity the growth of weather-dependent generation increases system variation.

Flexibility does not have to be built only at national level. It can also be built at consuming sites. When a company can limit instantaneous power, shift load, use storage or generate part of its own electricity when needed, it reduces its dependence on the tightest moments in the system.

4. A demand site can be part of the problem or part of the solution

A large new electricity-consuming site adds to system load if its consumption is rigid and coincides with other high-demand hours. The same site can support the system if it has the ability to flex.

In a data centre, flexibility can be built with storage, with the design of backup power and the connection, and with control of critical and non-critical loads. In industry it can come from production scheduling, storage, heat processes, electric boilers or on-site generation.

In Power-to-X projects, flexibility can be part of the business model. An electrolyser can in some cases be run more when electricity is abundant and cheap, and turned down when power is scarce or the price is high.

What matters is that flexibility is designed in at the start of the investment. If the connection, process, automation, backup power and energy management are designed separately, adding flexibility later can become unnecessarily expensive or technically difficult.

5. Competitive advantage in the coming years comes from the ability to manage electrical power

The market change does not mean that electricity in Finland will be permanently expensive, or that new generation will not be enough in the long run. Finland’s renewable generation potential is significant. It does mean that in the transition, availability of power, timing of consumption and flexibility become more important.

For a company, managing electrical power can mean faster growth, lower power charges, better reliability, less dependence on connection timetables and more options as the electricity price varies.

Our view is simple: new wind is necessary, but it is not enough on its own. When demand grows fast and generation becomes more weather-dependent, flexible capacity becomes as important a part of the energy system as new generation.