Why is HVDC an important technology for energy transmission?

HVDC (High Voltage Direct Current) transmission overcomes many challenges of conventional power grids. This is achieved thanks to its ability to transfer high DC voltages with little loss. This is the only way to efficiently transfer renewable energy over long distances.

In our blog article, we'll take a closer look at this subject.

What is HVDC transmission?

HVDC transmission is a method of transmitting energy over long distances. It uses high voltage direct current, which has the advantage of low losses and enables large amounts of electricity to be transmitted more efficiently.

HVDC systems consist of converter stations that convert alternating current into direct current. Vacuum-soldered heat sinks are used to efficiently cool the power electronics inside the converter stations. This makes them ideal for transmitting renewable energy, such as electricity transmitted from offshore wind farms in the North Sea to consumers in the south of Germany, for example.

 

 

 

What are the challenges facing conventional energy transmission systems?

  • Energy losses

The transmission of electrical energy over long distances using alternating current results in significant losses, caused by the resistances of the power line and transformers.

 

  • Capacity limits

Conventional systems are reaching their limit in terms of capacity. This is particularly the case when integrating renewable energy into the supply of power to consumers, because existing systems can only        cope with fluctuations in supply to a limited extent.

 

  •  Environmental impacts

High-voltage AC systems can have a negative impact on the environment, such as creating electromagnetic fields, for example.

 

  • Grid stability

 Conventional systems have difficulty maintaining grid stability due to the increasing integration of decentralized energy sources such as solar and wind power.

These challenges have led to the development of technologies such as HVDC transmission.

What are the advantages of HVDC transmission?

HVDC applications not only reduce energy losses over long distances, they also have numerous other benefits:

 

  • They can better compensate for fluctuations in the energy supply from wind and solar systems. This is because they offer the option of reliably integrating electricity from remote locations into the grid.
  • These systems are able to provide higher transmission capacities, which is particularly useful when demand for energy increases. Another reason is when multiple energy sources are integrated into the grid.
  • HVDC transmission can transfer energy over thousands of kilometers. This makes it possible to connect remote energy sources with distant consumption centers.
  • Compared to high-voltage AC transmission, HVDC systems are more environmentally friendly and have a lower impact on the environment. The reason for this is that they generate fewer electromagnetic fields. They also increase efficiency when converting AC to DC.
  • HVDC transmission enables electricity to be traded efficiently between different countries and regions. This increases reliability in the supply of energy and makes it easier to access a range of different energy sources.

Where is HVDC technology used?

HVDC transmission is now used all over the world and plays a key role in efficient and sustainable energy transmission.

Examples include:

-> Long-distance transmission of renewable energy from remote areas to the grid

-> Connecting island networks

-> Trading electricity across borders

-> Submarine cables can be used to transfer energy between countries across oceans

Conclusion: HVDC transmission is the technology of the future

HVDC transmission is a method of transmitting energy over long distances. It consists of converters in converter stations that convert AC to DC and is ideal for integrating renewable energy sources.

It is used in a wide range of applications: transmitting renewable energy from remote areas, connecting island networks, cross-border electricity trade and much more.

Conventional systems face challenges such as energy losses, capacity limits, effects on the environment and grid stability.

 

The benefits of HVDC are:

-> the ability to adapt to fluctuations in alternative power sources

-> higher transmission capacity

-> stable transmission of energy over long distances

-> reduced impact on the environment, and

-> the capability of international electricity trading.

The numerous advantages make it an important technology for the sustainable and efficient transfer of energy.

Would you like to know more about HVDC transmission? Do you have any questions about cooling the high-performance electronics needed for this task using DAU vacuum-soldered heat sinks?

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