Abstract
In order to optimize the fuel consumption, the dynamic response and energy conversion efficiency for PEM fuel cell hybrid energy system, a new type energy management strategy based on fuzzy logic control strategy is proposed in this paper. The target output power of fuel cell takes combination criterion by the state of charge of battery pack and load variation. The IF-THEN rule is used to distribute the power between fuel cell and battery pack that fuel cell can respond quickly followed by the load variation, also to realize the energy distribution optimization between fuel cell and battery pack. The experimental result shows the strong robustness of the fuzzy logic control strategy under the load variation which verifies the correctness of the energy management strategy, also avoiding overcharge and over discharge for battery pack during the entire working period. The life of the fuel cell can be extended by the fuzzy logic control strategy.
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