看看德共自己官方數據,冬天風能只預計滿足7%的電能供給,出問題的是天然氣,煤和核能,跟風能基本沒關系
What went wrong?
The bitingly cold temperatures have caused major problems across the energy sector in Texas.
Wind turbines froze, as well as vital equipment at gas wells and in the nuclear industry.
But because gas and other non-renewable energies contribute far more to the grid than wind power, particularly in winter, these shortages had a far greater impact on the system.
So when critics pointed to a loss of nearly half of Texas's wind-energy capacity as a result of frozen turbines, they failed to point out double that amount was being lost from gas and other non-renewable supplies such as coal and nuclear.
Texas has promoted the development of wind energy over the past 15 years.
But the largest proportion comes from fossil fuels, as well as 10% from nuclear.
- 30GW being taken offline from gas, coal and nuclear sources
- a 16GW loss in capacity in wind and other renewable energy supplies
And this, it said, had severely curtailed its ability to satisfy a peak demand of 69GW over the past few days - a surge even greater than anticipated.
In its plan for an extreme winter weather event, Ercot says it expects only 7% to be provided by wind energy.
The company's Dan Woodfin said: "It appears that a lot of the generation that has gone offline today has been primarily due to issues on the natural gas system."
The
cold weather also affected a water system needed to run the South Texas Nuclear Power Station, causing one reactor to shut down.
Dr Joshua Rhodes, at the University of Texas at Austin, tweeted: "There is no single resource to blame for this.
"We usually think of peak events happening over a couple of hours. This one is lasting days.
"Wind has been below expected output. But so have other sources."