Being able to discharge and store power every second is needed because wind turbine power varies by the second.
Technology Advances (Revised, ARPA-E)
* Ultra-high field (25 Tesla) prototype magnet (20 kW, 3.2 MJ)
* 2G HTS wire with critical current over 600 A
* Modular, scalable converter concept for direct connection to medium voltage grid with high round trip efficiency (over 85%)
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