Current controller for a bidirectional boost input stage equipped with an LCL (inductance–capacitance–inductance) filter

Roberto Fantino, Claudio Busada and Jorge Solsona

Energy, 2015, vol. 84, issue C, 91-97

Abstract: A control strategy for a low resonance frequency LCL (inductance–capacitance–inductance) filter used in the input stage of dc–dc bidirectional boost converters is proposed. When compared with the classical L filter, an LCL filter allows to obtain a cheaper topology. However, with an LCL topology, damping is needed for guaranteeing the system stability. In this paper an active damping strategy is designed. The needed damping is achieved via a dynamic controller. The controller consists of a simple PI (proportional-integral) controller plus a linear filter added in series with the PI integrator term. The modified PI controller achieves the active damping of the LCL filter and allows to arbitrarily place the system closed-loop poles. The proposed strategy only requires measurement of the variable to be controlled, the source current. Simulation and experimental results validate the proposed controller and show its effectiveness.

Keywords: LCL (inductance–capacitance–inductance) filter; Active damping; Current control (search for similar items in EconPapers)
Date: 2015
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:84:y:2015:i:c:p:91-97

DOI: 10.1016/j.energy.2015.02.045

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