When the Earthquake/tsunami closed down all of Japan’s nuclear power plants, I reported that wind was one of the only remaining reliable, tsunami proof sources of power.

Now, Dallas Morning News quotes ERCOT, the Electric Reliability Council of Texas, which manages the state’s electrical systems:

The Texas electrical grid operator began emergency procedures to prevent total blackout on Tuesday as the heat lead to record electricity demand, and told customers to brace for a repeat in the next few days.

The high temperatures also caused about 20 power plants to stop working, including at least one coal-fired plant and natural gas plants.

..such outages aren’t unusual in the hot summer, and Texas is getting some juice from surrounding states and from Mexico.

According to an ERCOT spokesman, conventional power plants suffer in this kind of heat.

“They can’t really efficiently condense the steam that’s used to make electricity, so that causes unit deratings that they can’t generate as much as they could if the lake were cooler.”

The American Wind Energy Association notes: 

Meanwhile, some 1,800 MW of wind generation were available yesterday, more than double the 800 MW that ERCOT counts on during periods of peak summer demand for its long-term planning purposes. 1,800 MW is enough to power about 360,000 homes under the very high electricity demand seen yesterday.

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