London — UK day-ahead baseload power prices have risen sharply as unplanned plantoutages raised supply concerns, while healthy renewables forecast for peakhours limited gains for the peakload counterpart, which was seen at a discounton Tuesday.
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Baseload power for Wednesday delivery jumped more than GBP2 on the day toGBP42.75/MWh before S&P Global Platts' 11 am London time market close, whilethe peakload day-ahead price was GBP41.90/MWh, 65 pence higher on the day.
A similar trend was noted on the N2EX and APX spot daily auction in theUK where the base day-ahead cleared at GBP43.62/MWh, and above the peakloadspot auction settlement of GBP42.86/MWh, the exchanges data showed on Tuesday.
Network operator National Grid said it expects wind power generation topeak at 5.7 GW at 7 am UK time on Wednesday, which is at the start of the peakdemand period in the day, up from 4.8 GW predicted for Tuesday.
Also, peak solar power production was expected to remain stable at around4 GW on Tuesday and Wednesday, the Grid data showed.
Nuclear supplies from EDF Energy's 585 MW unit 2 at the Heysham 1 powerstation declined after the unit was taken offline at around 11 pm Monday.
In an emailed statement, EDF said it would confirm once the unit had beenreturned the unit to service. On its REMIT website, the operator said the unitis expected to return to the grid on April 8 at 9.30 pm.
In addition, Drax's 645 MW biomass unit 2 saw supplies falling to 560 MWTuesday morning due to an unplanned outage, National Grid data showed.
At midday Tuesday, gas-fired power generation accounted for half of theUK's energy mix at 17.6 GW, while coal supplies stayed below 1 GW, the Griddata showed.
Nuclear power output dropped by around 500 MW on the day to 7 GW atmidday, while wind output was 4.1 GW, the Grid said.