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- By Tom Espiner
- Business reporter, BBC News
Image source, Getty Images
Wasted wind power will add £40 to the average UK household’s electricity bill in 2023, according to a think tank.
That figure could increase to £150 in 2026, Carbon Tracker has estimated.
When it is very windy, the grid cannot handle the extra power generated. Wind farms are paid to switch off and gas-powered stations are paid to fire up. The cost is passed on to consumers.
The government said major reforms will halve the time it takes to build energy networks to cope with extra wind power.
Energy regulator Ofgem announced new rules in November, which it said would speed up grid connections.
Bottleneck
Most of the UK’s offshore wind farms are in England – Dogger Bank off the coast of Yorkshire is the largest in the world. Meanwhile, around half of onshore wind farms are in Scotland but most electricity is used in south-east England.
Carbon Tracker said the main problem in getting electricity to where it is needed is a bottleneck in transmission between Scotland and England.
The practice of switching off wind farms and ramping up power stations is known as “wind curtailment” and the costs are passed on to consumers, it said.
Carbon Tracker researches the impact of climate change on financial markets. It said since the start of 2023, wind curtailment payments cost £590m, adding £40 to the average consumer bill.
It warned those costs were set to increase to add £180 per year to bills by 2030, due to wind farms being built faster than the power cabling needed to transmit the electricity.
“The problem is, there are not enough cables. The logical solution would be to build more grid infrastructure,” said Lorenzo Sani, analyst at Carbon Tracker.
“It’s not even that expensive,” he added, compared with mounting wind curtailment costs.
Industry group RenewableUK said that grid constraints “reflect a chronic lack of investment in the grid”.
“We need to move from an antiquated grid which wastes power to one that’s fit for purpose in the 21st Century as fast as possible,” said Barnaby Wharton, RenewableUK’s director of future electricity systems.
However, historically it has taken between 10 and 15 years for new transmission cables to be approved.
Last year Ofgem approved four projects to help ease transmission issues, including an undersea cable between Peterhead in Aberdeenshire and Drax in Yorkshire.
But Carbon Tracker warned wind generation capacity in Scotland was set to be four times greater by 2030, but cabling would only double in that time, under current plans.
In November, the government set out a plan to reduce the time it takes to build new infrastructure from 14 to seven years, “speeding up grid connections, supporting thousands of jobs and reducing electricity bills for households across Great Britain”, a spokesperson said.
Energy regulator Ofgem said there was a “long queue” of energy projects “which could generate almost 400GW of electricity – well in excess of what is needed to power the entire British energy system”.
The watchdog said new rules “will allow stalled or speculative ‘zombie’ projects to be forced out of the queue, meaning viable projects can be connected quicker”.
Mr Sani from Carbon Tracker said it was unclear how much difference these projects would make before 2030.
What can I do if I can’t afford my energy bill?
- Check your direct debit: Your monthly payment is based on your estimated energy use for the year. Your supplier can reduce your bill if your actual use is less than the estimation.
- Pay what you can: If you can’t meet your direct debit or quarterly payments, ask your supplier for an “able to pay plan” based on what you can afford.
- Claim what you are entitled to: Check you are claiming all the benefits you can. The independent Moneyhelper website has a useful guide.
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