directly above the Lotsberg Salt formation, which provides an ideal geological setting for compressed air storage. Alberta’s extensive experience with salt cavern development also reduces technical uncertainty. “Alberta has decades of experience developing and operating salt caverns (since the 1950s), and the geology at Marguerite Lake is well suited for long-term storage applications,” says Costley. The proximity to existing transmission infrastructure offers another significant advantage. By locating the project adjacent to the Marguerite Lake substation, developers can use existing grid infrastructure rather than constructing entirely new transmission assets. A DIFFERENT APPROACH TO ENERGY STORAGE Compressed air energy storage operates differently from more familiar battery technologies. The process uses surplus electricity to compress air and store it underground in large salt caverns, and, when electricity demand increases, the compressed air is released, heated and expanded through turbines to generate power. One of the technology’s primary advantages is duration. While batteries are well suited for shorterduration applications, CAES can provide energy over much longer periods and can be expanded by developing additional underground caverns. Powering Alberta’s Energy Storage Future Powering a new era of energy storage, Hitachi Energy is providing grid connection solutions for the Marguerite Lake CAES project, strengthening Alberta’s grid reliability and advancing sustainability. Discover how hitachienergy.com/substations/margueritelakecaes 5
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