National Grid’s North Sea Link Strengthens Electricity Supply And Repays Its Carbon Cost In Just Six Months
The title of this post, is the same as that of this press release from National Grid.
These are three bullet points from the press release.
- World’s longest subsea electricity cable has been in operation since Oct 2021.
- 5.7 terawatt (TWh) hours of clean power have been shared between GB and Norway, strengthening security of supply for consumers in both countries.
- It has saved 800,000 tonnes of carbon in the first year, paying off its carbon cost after only six months of operation.
This must surely be considered a good start.
These two paragraphs describe the operation in the first year.
During its first year of operation, the link has imported 4.6 TWh of clean electricity – enough to power 1.5 million British homes for a year.
North Sea Link has also exported 1.1 TWh to Norway, demonstrating the vital role that interconnectors play in strengthening energy security and maximising the benefits of clean energy sources for consumers across the UK and Europe.
In The Monster In The Mountains That Could Save Europe’s Winter, I describe what makes the North Sea Link so important.
It gives the UK access to the Norwegian Bank Of Electricity or Ulla-Førre, which is a complex of five hydroelectric power stations and a massive lake in the Norwegian mountains to the East of Stavanger.
- The power stations have a total generating capacity of 2.1 GW.
- Lake Blåsjø is able to hold enough water to generate 7800 GWh of electricity.
- Ulla-Førre can also supply electricity to Germany, through the 1.4 GW NordLink.
If Ulla-Førre has a problem, it is that if Norwegian weather is dry, the filling of Lake Blåsjø could be difficult, which is where the interconnector comes into its own, as excess UK wind power or the 1,185 MW Hartlepool nuclear power station, can be used to send electricity to Norway for storage.
In An Update To Will We Run Out Of Power This Winter?, I predicted we will add the following capacity to our renewable generation in the next three years.
- 2023 – 2925 MW
- 3024 – 3726 MW
- 2025 – 6476 MW
This is a total of 13,127 MW.
As a Control Engineer, I can see the following happening.
- Several of the UK’s gas-fired power stations will be mothballed.
- Some of the UK’s gas-fired power stations will be fitted with advanced control systems so they can supply more precise amounts of electricity.
- Some UK electricity is stored in Ulla-Førre for onward sale to Germany.
- Some UK electricity is stored in Ulla-Førre for withdrawal back to the UK, when needed.
One of Ulla-Førre’s main tasks could be to ensure that no UK electricity is wasted.
Conclusion
With all these wind generated electricity and electricity transfers, the Crown Estate, National Grid and the Treasury should be coining it.
The Germans are already building the 1.4 GW NeuConnect between the Isle of Grain and Wilhelmshaven to import more electricity.
But I do believe that another interconnector will be needed.
The Anonymous Widower 
We must not mothball CCGTs until we have sufficient storage to compensate for windless days. They are are the only dispatchable power left on the grid that can generally be run up to full load within 30mins your looking at 8hrs for the coal units. Just look at this week negligible wind on Tuesday midday upto a excellent 16GW yesterday for a few hours but then run back down to 4GW now. Something has to fill the gap that can load follow.
Comment by Nicholas Lewis | October 20, 2022 |