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A renewable energy-based dc micro-grid with hybrid energy storage, consisting of battery and ultracapacitor, is investigated. To achieve high penetration depth of renewable sources into the utility grid, a novel system operation strategy and the corresponding energy management method is proposed. In the operation strategy, the ultracapacitor unit works as the sole voltage source of the micro-grid...
A mathematical method is proposed for optimal scheduling lead-acid batteries for cycling use in this work. Typical battery characteristic curves and experiential data, including the discharge rate vs. discharge time, discharge depth vs. cycling times, are first converted into mathematical expressions with consideration of the circumstance temperature. And then through the proposed optimization algorithm...
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