Modeling and control strategy for cascade bi-directional DC/DC converter in Microgrid
Conference Proceedings - 2012 IEEE 7th International Power Electronics and Motion Control Conference - ECCE Asia, IPEMC 2012（2012）
摘要
In the energy storage system in Microgrid, the voltage of super capacitor drops quickly when the super capacitor is delivering power. In condition that the voltage of DC bus constant, we need to enhance the conversion ratio of DC/DC converter. To avoid the switching devices operating at extremely high or low duty ratios and satisfy the practical requirements of Microgrid, a bi-directional topology is adopted and a cascade connection is proposed. In this paper, modeling and control strategy for n-stage converter are given. Simulation results are presented to verify the control method.
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关键词
DC-DC power convertors,distributed power generation,supercapacitors,switching convertors,DC bus constant,cascade bidirectional DC-DC converter topology,control strategy,conversion ratio,energy storage system,low duty ratio,microgrid,n-stage converter,supercapacitor voltage drop,switching devices,bi-directional,cascade,dc-dc,
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