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Since wind and solar power fluctuate, how do you keep the power grid stable?

Update Time:2016-06-07 10:28:51 Writer:Sunningwind Source:www.sunningwind.com

Wind and solar are complementary in nature. When the wind is not blowing, the sun is often shining during the day. But really you have to match peaks in demand. The way to do that is to use low-cost electricity, heat storage and cold storage. Electricity storage includes concentrated solar power storage, pumped hydroelectric power and existing hydroelectric power. Heat/cold storage includes hot and cold water, ice and underground rock. In addition, some energy is stored in hydrogen for use in transportation. Finally, we combine these features with demand-response management.

Why the focus on solar and wind?

Because they’re the only two forms of energy that theoretically can supply the entire world for all purposes, many times over. We can use geothermal, hydro, tidal wave. Geothermal would be in more limited locations, but it’s a good resource. Hydro (electric) is not going to grow. There’s opposition to it; we wouldn’t add any new hydropower dams, just increase the efficiency of the existing ones. Tidal wave is more expensive, so there’s probably lesser penetration. Also it’s a limited resource.
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