http://www.reuters.com/article/newsO...49522920080228
Quote:
Electric Reliability Council of Texas (ERCOT) said a decline in wind energy production in west Texas occurred at the same time evening electric demand was building as colder temperatures moved into the state.
ERCOT said the grid's frequency dropped suddenly when wind production fell from more than 1,700 megawatts, before the event, to 300 MW when the emergency was declared.
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Shows how this source of power is less reliable and can dissapear at times of most need.