2019
DOI: 10.3390/en12091656
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Parallel Resonance Mechanism Analysis and Suppression of Inductance-Capacitance-Inductance Grid-Connected Inverters

Abstract: The resonance problem of multi-paralleled grid-connected inverters with inductance-capacitance-inductance (LCL) filters is a core matter which bothers the safety and stability operation of new energy distribution networks. Based on the impedance model of the paralleled system of two inverters, the influence of inverters on grid-connected current was analyzed through the superposition principle, and the grid-connected current was decomposed. The resonant mechanism generated by interactive current and the common… Show more

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Cited by 4 publications
(1 citation statement)
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“…The passive damping method acts on the LCL filter by inserting the impedance around the filter resonant frequencies at the expense of additional power loss and degradation of filtering attenuation [3][4][5]. The active damping (AD) approach is to integrate the damping function into the inverter control so that the inverter equivalent output impedance around the filter resonant frequencies or over the frequency range is increased [2,[6][7][8][9][10][11][12][13]. Among them, active damping methods are preferred because no additional power consuming resistor is required.…”
Section: Introductionmentioning
confidence: 99%
“…The passive damping method acts on the LCL filter by inserting the impedance around the filter resonant frequencies at the expense of additional power loss and degradation of filtering attenuation [3][4][5]. The active damping (AD) approach is to integrate the damping function into the inverter control so that the inverter equivalent output impedance around the filter resonant frequencies or over the frequency range is increased [2,[6][7][8][9][10][11][12][13]. Among them, active damping methods are preferred because no additional power consuming resistor is required.…”
Section: Introductionmentioning
confidence: 99%