Last week was one of the coldest spells of weather here in Ireland of recent years. As usual with very cold periods, wind generation was low. The grid operators struggled to keep the lights on and many amber alerts were issued.
Wind energy contributed about 20% of the power on average.
Whitegate Gas power station was and still is out of action which is surprising for a modern ten year old power station. Gas power still provided the majority of the power in the grid mix - around 50%.
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Wind energy last week - only a small portion of the total installed wind capacity of 4,000MW was available at times |
Coal provided 12% despite only two out of the three generators at Moneypoint functioning.
An internal ESB memo shows that national grid operator, Eirgrid, asked the company to start up one of its three generators at Moneypoint in Co Clare, which had been shut down, to avoid any possible risk of blackouts [Eirgrid].
Starting up a coal generator takes at least 16 hours to start up from scratch (cold start) so presumably this unit was kept ticking over (warm start). This is what many wind advocates do not understand - you simply cannot switch off a large power station and expect to turn it back on again at short notice.
Imports were only 1% presumably because UK had no surplus electricity of their own.
This then leaves "Other" at 10%.
There are only two possibilities for what this comprises now that all but one of the three peat power stations have been discontinued - waste to energy and oil/diesel. Only one waste to energy plant is currently in operation at 62MW. So assuming it was running at max output it was providing about 1.5% of the total fuel mix. Edenderry peat power station now operates at about 60MW also (the other half of it's fuel source is biomass) so likewise about 1.5%. Therefore, unless I'm missing something, about 7% of the fuel mix came from oil and diesel generators.
Which is roughly the portion of fuel mix from the two peat power stations that were closed down. Oil generation has not contributed this much since the 2000s. This amounts to an indictment of the renewable energy program, in that 4,000MW of new wind energy installed cannot replace 230MW of peat.
Based on that, the expectation that Moneypoint coal power station will close down by 2025 is now looking very unlikely.