针对微电网中V2G的运用,设计了微电网中电动汽车充电桩的策略,充电桩双向导通时变换器采用电压外环、电流内环的双环控制,换流器采用下垂控制,对有功功率有移峰填谷的作用,同时可以作为动态无功补偿装置稳定微电网的电压.充电桩单向导通给电动汽车充电时,换流器采用恒直流电压无功功率控制,稳定直流母线电压.变换器采用恒压、恒流、恒功率3种控制方式,满足电动汽车充电需求.最后仿真验证了本文充电桩策略的可行性.%For the application of V2G technology in micro grid,the strategy of electric vehicle charging pile in micro grid is designed.When charging pile double break over voltage converter using outer inner current dual-loop control,converter based on droop control.For hard power it has a peak shifting and valley filling the role,at the same time can be as dynamic without compensation device to table voltage of micro-grid,and reduce micro grid energy storage device burden.When charging pile one-way conduction to the electric car charging,converter with constant DC voltage no power to control,stable DC bus voltage.Converter uses three control modes of constant voltage,constant current,constant power to meet the needs of electric vehicle charging.Simulation results verify the feasibility of the charging pile strategy.
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