Design of Robust Distributed Control for Interconnected Microgrids

Hossain, M. J.; Mahmud, M. A.; Milano, Federico; Bacha, Seddik; Hably, Ahmad

doi:10.1109/tsg.2015.2502618

Cited by 108 publications

(56 citation statements)

References 35 publications

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“…Among the existing publications with distributed control methods [13], [14], [25]- [27], both one-layer architecture [13], [14] and two-layer architecture are adopted [25]- [27] . In [13], [14], a distributed communication network including all DG units of the NMG system exists under the one-layer architecture.…”

Section: ) Control Methods Of Nmg Systemsmentioning

confidence: 99%

A Two-Layer Distributed Cooperative Control Method for Islanded Networked Microgrid Systems

et al. 2020

IEEE Trans. Smart Grid

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This paper presents a two-layer, four-level distributed control method for networked microgrid (NMG) systems, taking into account the proprietary nature of microgrid (MG) owners. The proposed control architecture consists of a MG-control layer and a NMG-control layer. In the MG layer, the primary and distributed secondary control realize accurate power sharing among distributed generators (DGs) and the frequency/voltage reference following within each MG. In the NMG layer, the tertiary control enables regulation of the power flowing through the point of common coupling (PCC) of each MG in a decentralized manner. Furthermore, the distributed quaternary control restores system frequency and critical bus voltage to their nominal values and ensures accurate power sharing among MGs. A small-signal dynamic model is developed to evaluate dynamic performance of NMG systems with the proposed control method. Time-domain simulations as well as experiments on NMG test systems are performed to validate the effectiveness of the proposed method.

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Section: ) Control Methods Of Nmg Systemsmentioning

confidence: 99%

A Two-Layer Distributed Cooperative Control Method for Islanded Networked Microgrid Systems

et al. 2020

IEEE Trans. Smart Grid

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“…In [14], [15], [16], [17] the application of optimal control design techniques for microgrids with multiple VSIs has been explored. Classical H ∞ methods are used in [18], [19] to improve primary frequency control, but as the problem is posed in an LFT form, it is difficult to correctly define the desired performance specifications.…”

Section: Introductionmentioning

confidence: 99%

Decentralized and Distributed Transient Control for Microgrids

Kammer

Karimi

2019

IEEE Trans. Contr. Syst. Technol.

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Abstract-This paper treats the problem of primary and secondary control design in low-inertia power grids with mixed lines and a large amount of inverter-interfaced generation. A dynamic phasor model is developed that represents the electromagnetic and electromechanic dynamics of lines, inverters, synchronous machines and constant power loads. The model offers a straightforward way to combine white-, grey-and blackbox models, and its structure lends itself well to control design. In a next step, a novel method to design fixed-structure robust controllers based on the frequency response of multivariable systems and convex optimization is presented. The method offers an intuitive way to define the control performance specifications, and is able to directly design discrete-time controllers. Finally, the potential of the control design method and the dynamic phasor model is demonstrated in a comprehensive example. In three scenarios it is illustrated how the approach can be used to significantly improve frequency and voltage transient performance in low-inertia power grids. Decentralized as well as distributed architectures for primary and secondary control are studied, and results are validated in simulation.

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“…Interconnecting multiple stand-alone MG systems can bring the economic benefit due to the ability of sharing surplus power in each MG. Improving the system reliability is another advantage of the MMG system because the amount of load-shedding could be reduced, as mentioned in [6,7]. Moreover, the integration of renewable energy resources (RESs) into the MG system can be increased due to the flexible frequency qualities in the MMG system [8].…”

Section: Introductionmentioning

confidence: 99%

“…Several control strategies of the DC-link voltage have been proposed for the BTB converters to improve the stability of the MMG system as well as the stability of the BTB converter [27][28][29]. The interface between multiple MGs based on the BTB converters has been discussed in [7,8,19] to enhance system stability since each MG can participate in the voltage and frequency regulation. Distribution-interline power flow controller has been used for interconnecting multiple MGs to manage the power sharing and optimally coordinate the adjacent MGs [18].…”

Section: Introductionmentioning

confidence: 99%

Multi-Frequency Control in a Stand-Alone Multi-Microgrid System Using a Back-To-Back Converter

2017

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Abstract:A stand-alone multi-microgrid (MMG) system can be formed by connecting multiple stand-alone microgrids (MGs). In the stand-alone MMG system where the frequencies of each MG system are different, a back-to-back (BTB) converter can be used for interconnecting the adjacent MG system. The frequency control performance of the MMG system can be improved by designing the suitable controller of the BTB converter. This study proposes a multi-frequency control in the BTB converter to improve the performance of frequency regulation in the MMG system. Autonomous power sharing between each MG system is achieved by using the proposed multi-frequency control. The stand-alone MMG system where two stand-alone MG systems with different nominal frequencies are interconnected using the BTB converter is simulated in this study to show the feasibility of the proposed multi-frequency controller. Each stand-alone MG system consists of an inverter-based distributed generator (DG) that uses a grid-forming converter with a conventional frequency droop controller. The inverter-based DG is responsible for the primary frequency control in each MG system. To show the effectiveness of the proposed multi-frequency control, a comparison study of the multi-frequency control and the single frequency control is presented in this study. Simulation results show that the system stability can be improved by using the proposed multi-frequency controller.

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Design of Robust Distributed Control for Interconnected Microgrids

Cited by 108 publications

References 35 publications

A Two-Layer Distributed Cooperative Control Method for Islanded Networked Microgrid Systems

A Two-Layer Distributed Cooperative Control Method for Islanded Networked Microgrid Systems

Decentralized and Distributed Transient Control for Microgrids

Multi-Frequency Control in a Stand-Alone Multi-Microgrid System Using a Back-To-Back Converter

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