Output Impedance Design of Parallel-Connected UPS Inverters With Wireless Load-Sharing Control

Guerrero, Josep M.; Vicuña, Luis García de; Matas, J.; Castilla, Miguel; Miret, Jaume

doi:10.1109/tie.2005.851634

Cited by 1,092 publications

(725 citation statements)

References 20 publications

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“…To establish this result we make the important observation that the dependence with respect to δ of the dynamics (9), (1) is via angle differences δ ik . This immediately leads to the following two implications: (i) the flow given in (16) is invariant to a shift in the δ coordinate of the form δ + 1 n ω s t. Consequently, we can study the stability of the synchronized motion (17) in the coordinates col(δ(t),ω(t),…”

Section: Error Dynamicsmentioning

confidence: 99%

“…the asymptotic stability of which implies asymptotic convergence of all trajectories of the system (9), (1) to the synchronized motion (17) up to a uniform shift of all angles. 4 The constant θn is not part of the state vector θ.…”

Section: Error Dynamicsmentioning

confidence: 99%

“…However, in a highly ohmic network, the droop control laws (4) may induce high fluctuating currents due to the stronger coupling of phase angles and reactive power, see (1). Then, additional methods such as the virtual output impedance [17] or alternative droop control laws [43] could be employed instead of (4). Remark 6.6.…”

Section: Active Power Sharingmentioning

confidence: 99%

“…In this case, several modified droop controls [6,43,16] have been proposed. Even in the presence of nonnegligible line resistances the application of the droop controls of [3,4] can be justified, on one hand, via the virtual impedance approach [17] while, on the other hand, invoking their analogy to conventional droop control [10] of SGbased grids.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Conditions for stability of droop-controlled inverter-based microgrids

Schiffer¹,

Ortega²,

Astolfi³

et al. 2014

Automatica

384

367

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We consider the problem of stability analysis for droop-controlled inverter-based microgrids with meshed topologies. The inverter models include variable frequencies as well as voltage amplitudes. Conditions on the tuning gains and setpoints for frequency and voltage stability, together with desired active power sharing, are derived in the paper. First, we prove that for all practical choices of these parameters global boundedness of trajectories is ensured. Subsequently, assuming the microgrid is lossless, a port-Hamiltonian description is derived, from which sufficient conditions for stability are given. Finally, we propose for generic lossy microgrids a design criterion for the controller gains and setpoints such that a desired steady-state active power distribution is achieved. The analysis is validated via simulation on a microgrid based on the CIGRE (Conseil International des Grands Réseaux Electriques) benchmark medium voltage distribution network.

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Section: Error Dynamicsmentioning

confidence: 99%

Section: Error Dynamicsmentioning

confidence: 99%

Section: Active Power Sharingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Conditions for stability of droop-controlled inverter-based microgrids

Schiffer¹,

Ortega²,

Astolfi³

et al. 2014

Automatica

384

367

View full text Add to dashboard Cite

show abstract

“…Several droop control techniques have been proposed in the literature, where the droop functions have to be modified depending on the type of the output impedance of the inverter [10], [12]. Traditionally, inverters introduce an inductive output impedance and the real power is mainly related to the frequency of the grid, while the reactive power is related to the grid voltage.…”

mentioning

confidence: 99%

Current-limiting droop controller with fault-ride-through capability for grid-tied inverters

Paspatis

Konstantopoulos

Mayfield

et al. 2017

2017 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe)

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© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. Reproduced in accordance with the publisher's self-archiving policy.eprints@whiterose.ac.uk https://eprints.whiterose.ac.uk/ Reuse Unless indicated otherwise, fulltext items are protected by copyright with all rights reserved. The copyright exception in section 29 of the Copyright, Designs and Patents Act 1988 allows the making of a single copy solely for the purpose of non-commercial research or private study within the limits of fair dealing. The publisher or other rights-holder may allow further reproduction and re-use of this version -refer to the White Rose Research Online record for this item. Where records identify the publisher as the copyright holder, users can verify any specific terms of use on the publisher's website. TakedownIf you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing eprints@whiterose.ac.uk including the URL of the record and the reason for the withdrawal request. Current-Limiting Droop Controller with

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Control of Power Converters inacanddcMicrogrids

Dragičević

Meng

Blaabjerg

et al. 2019

Wiley Encyclopedia of Electrical and Electronics Engineering

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In this paper a repetitive control (RC) approach to improve current sharing between parallel-connected boost converters in DC microgrids is presented. The impact of changes in line impedance on current sharing is investigated. A repetitive controller is designed and connected in series with current controller of the boost converters to control the switching signals such that by regulating of the output voltage of each converter, the circulating current is minimized. The performance of the proposed control strategy is validated through simulation.

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Output Impedance Design of Parallel-Connected UPS Inverters With Wireless Load-Sharing Control

Cited by 1,092 publications

References 20 publications

Conditions for stability of droop-controlled inverter-based microgrids

Conditions for stability of droop-controlled inverter-based microgrids

Current-limiting droop controller with fault-ride-through capability for grid-tied inverters

Control of Power Converters inacanddcMicrogrids

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