Adding Transmission Line Capacity
“Missing link so far is permitting reform.” -David Crane, DOE Undersecretary for Infrastructure
Image for illustration purposes.
The transition to renewable energy faces several challenges, including geographical limitations and the variable nature of renewable energy production. One promising solution to these challenges is the development of interconnectors, which are high-voltage cables that link electricity grids of different regions or countries. These interconnectors can facilitate the exchange of surplus energy, helping to balance the inconsistencies inherent in renewable energy generation. For example, if one country experiences a cloudy day and its solar output decreases, another country with sunny weather can compensate for this energy shortfall.
Interconnectors can also enable countries to exploit their unique renewable energy advantages. For instance, solar energy generated in Africa could be transmitted to Europe during winter months when solar availability is low. By allowing countries to share their renewable energy resources, interconnectors can reduce waste and enhance overall energy efficiency.
The UK has already established several interconnectors with countries such as Belgium, France, Ireland, and Norway. The longest of these is the 720 km connection to Norway, which facilitates the exchange of hydropower. However, plans for future interconnectors are ambitious, including the Xlinks project, which aims to connect the UK to Morocco with a 3,800 km cable. Similarly, discussions are underway for a 4,200 km connection between Australia and Singapore. Both Morocco and Australia are well-suited for solar energy production, making them ideal partners for supplying renewable power.
Despite their potential, interconnectors come with challenges. The cost of laying one kilometre of cable can reach approximately €3 million, leading to overall project costs that can soar to around €16 billion. To make these projects financially viable, significant reductions in energy production costs are necessary. Additionally, the timeline for construction can be lengthy, as manufacturers often handle only one cable contract at a time, leading to extended delivery times.
In summary, interconnectors are a crucial element in the global energy transition. By facilitating the exchange of renewable energy, interconnectors can enhance the reliability and sustainability of power systems, ultimately supporting a cleaner and more resilient energy future.
Source: T&D World
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