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February 20, 2022 11:16 pm

Could Texas Avoid Blackouts With Renewable Energy?

"Around this time last year, millions of Texans were shivering without power during one of the coldest spells to hit the central United States," remembers the Washington Post. "For five days, blackouts prevented people from heating their homes, cooking or even sleeping. More than 200 people died in what is considered the nation's costliest winter storm on record, amounting to $24 billion in damages. "Twelve months later, the state's electrical grid, while improved, is still vulnerable to weather-induced power outages.""If we got another storm this year, like Uri in 2021, the grid would go down again," said Andrew Dessler, a professor of atmospheric sciences at Texas A&M University. "This is still a huge risk for us." Now, a recent study shows that electricity blackouts can be avoided across the nation — perhaps even during intense weather events — by switching to 100 percent clean and renewable energy, such as solar, wind and water energy. "Technically and economically, we have 95 percent of the technologies we need to transition everything today," said Mark Jacobson, lead author of the paper and professor of civil and environmental engineering at Stanford University. Wind, water and solar already account for about one fifth of the nation's electricity, although a full transition in many areas is slow. The study showed a switch to renewables would also lower energy requirements, reduce consumer costs, create millions of new jobs and improve people's health.... The team found the actual energy demand decreased significantly by simply shifting to renewable resources, which are more efficient. For the entire United States, total end-use energy demand decreased by around 57 percent. Per capita household annual energy costs were around 63 percent less than a "business as usual" scenario.... In Texas, a complete green transition would reduce the annual average end-use power demand by 56 percent. It also reduces peak loads, or the highest amount of energy one draws from the grid at a time. Jacobson said many homes would also have their own storage and wouldn't need to rely on the grid as much. The team also found interconnecting electrical grids from different geographic regions can make the power system more reliable and reduce costs. Larger regions are more likely to have the wind blowing, the sun shining or hydroelectric power running somewhere else, which may be able to help fill any supply gaps. "The intermittency of renewable energy declines as you look at larger and larger areas," said Dessler. "If it's not windy in Texas, it could be windy in Iowa. In that case, they could be overproducing power and they could be shipping some of their extra power to us." The study stated costs per unit energy in Texas are 27 percent lower when interconnected with the Midwest grid than when isolated, as it currently is. Interestingly, long-duration batteries aren't important for grid stability. the team found, since our current 4-hour batteries can just be connected for longer-term storage. Professor Dessler tells the Post we should think of "renewables" as a system which includes storage technology and easily-dispatchable energy solutions. And the Post adds that a grid powered by renewables "would also produce cleaner air, which could reduce pollution-related deaths by 53,000 people per year and reduce pollution-related illnesses for millions of people in 2050."

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