Hierarchical Control System for Robust Microgrid Operation and Seamless Mode Transfer in Active Distribution Systems

Mohamed, Yasser Abdel-Rady I.; Radwan, Amr Ahmed A.

doi:10.1109/tsg.2011.2136362

Cited by 267 publications

(118 citation statements)

References 28 publications

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“…1). During that time, a controller is needed to preserve the stability and reliability of each unit to achieve seamless mode transfer, which is adopted by many researchers [7]- [20]. A nonlinear sliding-mode voltage controller and adaptive power sharing controller are proposed in [7].…”

Section: Introductionmentioning

confidence: 99%

Control Strategy for Uninterrupted Microgrid Mode Transfer During Unintentional Islanding Scenarios

Issa

Khateb

Abusara

et al. 2018

IEEE Trans. Ind. Electron.

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Abstract-This paper presents a microgrid control strategy to unify the control topology for energy storage systems (ESS) and renewable energy sources (RES) inverters in an AC microgrid and to protect the microgrid reliability from unintentional islanding instability using control loops which use the DC link voltage as a feedback. This bounds the DC link voltage and provides reliable operation in the microgrid. Simulation validates the proposed control strategy, and experiment results extol the concept.

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Section: Introductionmentioning

confidence: 99%

Control Strategy for Uninterrupted Microgrid Mode Transfer During Unintentional Islanding Scenarios

Issa

Khateb

Abusara

et al. 2018

IEEE Trans. Ind. Electron.

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“…The voltage, frequency regulation and power sharing of the islanded microgrid with multiple inverters are difficult problems. In order to avoid circulating currents among the converters, the droop-control method is often applied [3]. However, in multiple inverters paralleled MGs, there are no…”

Section: Introductionmentioning

confidence: 99%

Networked Hierarchical Control Strategy for Voltage and Frequency in an Islanded Microgrid Considering Time Delay

Wu¹,

Lei²,

Hao³

2017

IJCA

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“…Therefore, the control performance of the interface inverter is the focal point in maintaining the stability of the micro-grid. Various control management and operation strategies for micro-grid have been proposed in the past decades [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. Several PQ controlled micro-grids were developed in [7][8][9], where the interface inverter is equivalent to a controlled current source.…”

Section: Introductionmentioning

confidence: 99%

“…To mitigate voltage and frequency variations, strategies to manage mode transfer from grid connected to islanded mode for micro-grids of commercial buildings were developed [14]. A hierarchical control for seamless transition to islanding was also developed [15]. Some other methods for smooth transfer between both grid-connected and islanded modes are investigated in [16][17][18][19][20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Transient Oscillations Analysis and Modified Control Strategy for Seamless Mode Transfer in Micro-Grids: A Wind-PV-ES Hybrid System Case Study

et al. 2015

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Abstract:With the rapid development of the micro-grid associated with new and clean energies, the smooth switching between grid-connected and islanded operation modes of the micro-grid is a key issue that needs to be addressed urgently. In traditional solutions, V/f (Voltage/frequency) control is adopted for the master micro sources when the micro-grid works in islanded mode, while PQ (real and reactive power) control is adopted when in grid-connected mode. However, when the two controllers switch when mode transfer occurs, transient oscillations usually occur and thereafter the dynamic response will be degraded. This paper considers an archetypical micro-grid with Wind-PV-ES (Wind, Photovoltaic and Energy Storage) hybrid system, which forms the basis of our case study. The underlying reason for such transient oscillation is analyzed in this paper. Thereafter a modified control strategy for seamless mode transfer is designed and implemented. An improved PQ control method is designed by which the output of the PQ controller always synchronously tracks the output of the V/f controller for micro-grid switches from islanded mode to grid-connected; furthermore, a dq rotating coordinate synchronization based V/f control method is proposed for transition from grid-connected mode to islanded mode. Finally, experiments and analysis are undertaken on some basic and important operating cases; the results in our case study indicate that the modified control strategy is effective in dominating the micro-grid during mode transfer and thus yielding significantly better performances.

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Hierarchical Control System for Robust Microgrid Operation and Seamless Mode Transfer in Active Distribution Systems

Cited by 267 publications

References 28 publications

Control Strategy for Uninterrupted Microgrid Mode Transfer During Unintentional Islanding Scenarios

Control Strategy for Uninterrupted Microgrid Mode Transfer During Unintentional Islanding Scenarios

Networked Hierarchical Control Strategy for Voltage and Frequency in an Islanded Microgrid Considering Time Delay

Transient Oscillations Analysis and Modified Control Strategy for Seamless Mode Transfer in Micro-Grids: A Wind-PV-ES Hybrid System Case Study

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