Unified hybrid (Ac/Dc) active distribution networks droop-based load-sharing strategy

Maryama, Victor; Zeni, Vitor Seger; Pica, Cesare Q.; Ortmann, Marcio S.; Heldwein, Marcelo Lobo

doi:10.1109/isgteurope.2014.7028955

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…Otherwise the trigger signal remains zero. If Trga = 1, the input to the PI controller is ef as in (11).…”

Section: B Mode-2: Power Shortfall In Ac-mgmentioning

confidence: 99%

“…Once the reference power Pdca * is computed from (11) or Pdcb * is computed from (12), the voltage across the capacitor Cdc has to be changed to facilitate this amount of power flow between the two MGs. The schematic diagram for the capacitor voltage reference generation scheme is shown in Fig.…”

Section: DC Capacitor Votage Reference For Icmentioning

confidence: 99%

“…Subsequently, during coupling of the AC microgrid and the DC microgrid, the major challenge for controlling the power sharing is the mismatch of the droop coefficients of the interlinking converter [10]. Normalization of the droop equations [10] and a technique considering AC side frequency and DC side voltage as a common signal to generate droop coefficients for the interlinking converter has been adopted in the existing research [11].…”

Section: Introductionmentioning

confidence: 99%

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Power sharing in a hybrid microgrid with bidirectional switch

Datta

Ghosh

Rajakaruna

2017

2017 IEEE Power &Amp; Energy Society General Meeting

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The main aim of this study is to facilitate controlled power flow in a hybrid microgrid (MG) containing an AC and a DC side. These two sides are connected through an interlinking converter (IC). It has been assumed that distributed generators (DGs) in the AC side and the DC side supply their local loads through AC and DC droops respectively. During a power shortfall in one of the two sides, the required amount of is drawn from the other side through the interlinking converter. A new approach is proposed in this paper in which power shortfall is detected in the ac side though frequency and by voltage in the dc side. The IC is then controlled such that bi-directional power flow can be achieved. Simulation studies are conducted on PSCAD/EMTDC to validate the proposal.

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“…Otherwise the trigger signal remains zero. If Trga = 1, the input to the PI controller is ef as in (11).…”

Section: B Mode-2: Power Shortfall In Ac-mgmentioning

confidence: 99%

Section: DC Capacitor Votage Reference For Icmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Power sharing in a hybrid microgrid with bidirectional switch

Datta

Ghosh

Rajakaruna

2017

2017 IEEE Power &Amp; Energy Society General Meeting

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“…The proposed control strategy relies on a simple communication link, and the applied method for VSC in the grid-connected mode belongs to the unidirectional control. In Eghtedarpour and Farjah (2014), Maryama et al (2014), andMalik et al (2018), a single-stage VSC was used to interface the DC and AC microgrids. The corresponding droop control and modified droop strategies were designed for load sharing and power interaction.…”

Section: Introductionmentioning

confidence: 99%

A unified decentralized framework for isolated interlinking converters of hybrid DC/AC microgrids

Yang²,

Peng³

et al. 2023

Front. Energy Res.

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Due to the advantages of effectively integrating diversified loads and renewable sources, hybrid DC/AC microgrids have attracted the common attention of industry and academia. Meanwhile, with the increasing number of power electronic devices connected to the system, the complexity of the system increases, which puts forward higher requirements for galvanic isolation and intelligent control methods. This study proposes a unified decentralized framework for isolated interlinking converters (IICs) in hybrid DC/AC microgrids, which include topology and a control strategy to solve the aforementioned problems. Firstly, in terms of topology, a dual active bridge (DAB) converter is adopted to realize galvanic isolation and DC voltage conversion, which can facilitate the interconnection of DC microgrids or be combined with VSC for the interconnection of DC and AC microgrids. Secondly, in terms of the control strategy, a bidirectional voltage–supporting control strategy is proposed for IICs, in which the frequency and voltage are adopted as the indications to balance the power and strengthen the inertia interaction of microgrids. Furthermore, with the proposed control strategy, the voltage sources of different microgrids can share the power fluctuation, cooperatively. The stability of the proposed strategy is analyzed, and the effectiveness is verified by several HIL experiments.

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