Passive Based Control of LCL Grid-Side Converters for AC Microgrid

IECON 2023- 49th Annual Conference of the IEEE Industrial Electronics Society(2023)

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摘要
In this paper, the research object of the three-phase LCL inverter under the AC microgrid is studied. Transforming the LCL inverter model to the Euler Lagrange (EL) equation and judging the passive characters of the EL model. Based on the theory of passive based control (PBC), a double closed-loop control with PBC control as the inner current loop and PI control as the outer voltage loop is proposed. The superiority of the PBC- PI controller in stabilizing the DC bus voltage and grid-connected current is verified under the conditions of sudden changes in DC side input and sudden changes in grid voltage. The comparative simulation results verified the the proposed strategy has better stability and rapidity.
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关键词
LCL,AC microgrid,PBC,DC/AC converters
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