Energy security: What is it and why does it play a major role in the energy transition?
Why is energy security under pressure?
For a long time, energy security was taken for granted. Fossil fuels were readily available and easy to store. In an energy system with a lot of sun and wind, that changes. These sources are sustainable, but not always available. That makes energy security an important point of attention within the energy transition. For example:
- Weather dependency - Sun and wind do not supply energy constantly. On a windless or cloudy day, production is lower.
- Growing demand for electricity - Due to electric cars, heat pumps and industry (electrification), the demand for electricity is growing.
- Decline of fossil sources - We are becoming less dependent on natural gas and oil, but these did provide stability in supply.
- International dependencies - Energy and raw materials often come from other countries. Geopolitical tensions can affect supply.
These factors make it clear that energy security does not come automatically. Deliberate choices and investments are needed.
Solutions for a secure energy system
To maintain energy security and make it more sustainable, work is being done on a combination of solutions.
1. Diversification of energy sources
A mix of energy sources makes the system less vulnerable. Think of:
- Sun and wind on land and at sea
- Sustainable gases such as green gas, green hydrogen
- Residual heat and geothermal heat
- Biomass
By spreading sources, the chance that everything fails at once is smaller.
2. Energy storage
Storage is crucial to keep supply and demand in balance. Examples are:
- Batteries for the short term
- Storage of sustainable gases for longer periods
- Heat storage for buildings and industry
Storage ensures that energy remains available, even when production is temporarily low.
3. Flexible energy use
Not all energy has to be used immediately. By managing consumption cleverly, the system can be relieved. Think of:
- Charging cars outside peak hours
- Industry that adjusts production to the availability of energy
This is called flexibility and is becoming increasingly important.
4. A strong and connected energy network
Networks for electricity, natural gas and heat must work well together. By linking systems, shortages in one system can be absorbed by another. Sustainable gases play an important role in this, because they can transport and store energy over large distances.
Energy security, affordability and sustainability
Energy security does not stand alone. It is one of the three pillars of the energy system, alongside affordability and sustainability. Measures that are good for the climate must also remain practical and affordable. Otherwise the energy transition loses public support in society.
It is precisely that trade-off between interests that makes the topic complex. There is rarely one right solution. Choices always have consequences for costs, CO₂ emissions and reliability.
In summary
- Energy security means: always sufficient, reliable and affordable energy
- The energy transition makes energy security more complex
- Solutions lie in diversification, storage, flexibility and system integration
- Sustainable gases and networks play a key role
- Deliberate choices are needed to keep security, affordability and sustainability in balance