Dynamic Microgrids With Self-Organized Grid-Forming Inverters in Unbalanced Distribution Feeders

Du, Yuhua; Liu, Xiaonan; Tu, Hao; Wang, Jianhui; Lukic, Srdjan

doi:10.1109/jestpe.2019.2936741

Cited by 47 publications

(16 citation statements)

References 28 publications

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“…Peng et al [211] presented the small-signal analysis of voltage unbalance correction strategies for islanded MGs through a detailed state-space model using dynamic phasors, and proposed a new compensation technique, while Ismail et al [212] presented a strategy based on supercapacitor storage for improving the dynamic performance of the system under unbalanced and non-linear loads. A control strategy enabling seamless system transition during unbalanced dynamic MG reconfiguration, and ensuring proportional powersharing using a distributed secondary control strategy is developed in [213] for DGs with grid forming inverters in unbalanced dynamic MGs, which is validated through HIL. A novel control algorithm using double reduced-order generalised integrators for a four-leg shunt converter is presented in [214], while Sedhom et al [215] proposed another robust H ∞ based controller for unbalance mitigation in islanded MGs.…”

Section: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

“…[212] presented a strategy based on supercapacitor storage for improving the dynamic performance of the system under unbalanced and non‐linear loads. A control strategy enabling seamless system transition during unbalanced dynamic MG reconfiguration, and ensuring proportional power‐sharing using a distributed secondary control strategy is developed in [213] for DGs with grid forming inverters in unbalanced dynamic MGs, which is validated through HIL. A novel control algorithm using double reduced‐order generalised integrators for a four‐leg shunt converter is presented in [214], while Sedhom et al .…”

Section: Unbalance Mitigation In the Islanded Modementioning

confidence: 99%

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Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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Unbalance or asymmetry in the distribution network is a well-known power quality issue. In the modern active distribution system, with the increasing penetration of renewables, this phenomenon becomes more pronounced. In the context of microgrids (MGs), several works have been proposed for the management and mitigation of the unbalance, for both the sharing of unbalanced load and maintaining the voltage quality in the islanded mode and for the control of distributed generators in the grid-connected mode during unbalanced conditions. This study comprehensively reviews, summarises, and classifies the various strategies of the unbalance mitigation techniques for the islanded and grid-connected modes of operation for threephase MGs and presents the possible challenges and avenues for future investigations on the topic.

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Section: Fig 4 Block Diagram Of a Typical Control Scheme For Addressmentioning

confidence: 99%

Section: Unbalance Mitigation In the Islanded Modementioning

confidence: 99%

Unbalance mitigation strategies in microgrids

Vijay

Doolla

Chandorkar

2020

IET Power Electronics

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“…Therefore, networked microgrids can be implemented to enable additional mutual grid support among them. As reported, grid sectionalization with multiple microgrids can be implemented based on the optimal scheduling of grid assets and effective transient management [13]- [16].…”

Section: Resilience Enhancement In Local and Regional Areasmentioning

confidence: 99%

“…Meanwhile, this type of networked microgrids can be further developed with changeable boundaries toward higher flexibility. Particularly, the boundary of each microgrid can be adjustable to better accommodate source and demandside grid assets in real time; therefore, a distribution feeder can be divided into multiple networked microgrids with changeable boundaries [13]- [16], and a resilient and reconfigurable distribution architecture can be implemented, as depicted in Fig. 2.…”

Section: C O N C L U S I O N : F U T U R E T R E N D S O F M I C mentioning

confidence: 99%

Sustainable and Resilient Distribution Systems With Networked Microgrids [Point of View]

Wang

Liu

2020

Proc. IEEE

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G rid modernization calls for increasing requirements of electric grid operation with enhanced sustainability and resilience [1]. In particular, distribution grids serve as a critical venue to bridge bulk upstream transmission and generation systems and a large number of downstream end users on the customer side, playing a significant role in modern electric grids for multiple purposes (e.g., renewable energy integration, power flow distribution, and end-user power quality enhancement) [2]. Under a normal grid operation condition, the increasing penetration level of renewable energy sources imposes new challenges on conventional distribution grid infrastructure (e.g., protection malfunction [3] and voltage violation [4]);

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“…The methods use separate coordinates frames and proportional-integral (PI) current regulators for each sequence [2]. Recently proportional-resonant (PR) controllers in the frame [3], in a stationary frame [4][5] or proportional-integral-resonant (PIR) controllers in a rotating frame [6] are applied, but still with sequences decomposition. One can find methods of reference signals calculation matching the desired control targets, without sequences decomposition [7] [8].…”

Section: Introductionmentioning

confidence: 99%

New Stationary Frame Transformation for Control of a Three-Phase Power Converter Under Unbalanced Grid Voltage Sags

Iwański

Maciejewski

Luszczyk

2021

IEEE J. Emerg. Sel. Topics Power Electron.

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The paper deals with a new nonlinear transformation providing representation of unbalanced threephase signals (voltage and currents) as vectors which have constant components in a new rotating frame. Using the proposed transformations the control system of a power electronic converter operating with an unbalanced grid can be equipped with proportional-integral PI controllers, without the use of resonant terms, for which anti-wind-up structures are more complicated and non-intuitive. The paper presents derivation of new direct and inverse transformations, features, a power converter model in a new frame, simulation results showing the waveforms of signals transformed to the new non-Cartesian frame, and simulation and experimental results of voltage oriented control for a grid connected power converter.

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Dynamic Microgrids With Self-Organized Grid-Forming Inverters in Unbalanced Distribution Feeders

Cited by 47 publications

References 28 publications

Unbalance mitigation strategies in microgrids

Unbalance mitigation strategies in microgrids

Sustainable and Resilient Distribution Systems With Networked Microgrids [Point of View]

New Stationary Frame Transformation for Control of a Three-Phase Power Converter Under Unbalanced Grid Voltage Sags

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