Microgrid clustering architectures

Bullich‐Massagué, Eduard; Díaz‐González, Francisco; Aragüés‐Peñalba, Mònica; Girbau-Llistuella, Francesc; Olivella‐Rosell, Pol

doi:10.1016/j.apenergy.2017.12.048

Cited by 187 publications

(127 citation statements)

References 63 publications

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“…The feasibility of DC interconnected MMGs is investigated in [19][20][21][22]. In the authors' previous work, the hybrid unit of common coupling (HUCC), which provides both AC and DC interfaces, is designed for MMGs in replacement of the conventional point of common coupling (PCC) [13].…”

Section: System Architecturementioning

confidence: 99%

A Multi-Layer Coordinated Control Scheme to Improve the Operation Friendliness of Grid-Connected Multiple Microgrids

Huang

Tai

et al. 2019

Energies

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Multiple microgrids (MMGs) are clusters of interconnected microgrids that have great potential for integrating a large number of distributed renewable energies (DREs). The grid-connected control scheme is important for the exploration of the MMGs’ operation potential. In this paper, a multi-layer coordinated control scheme for DC interconnected MMGs is proposed to optimize their operation and improve their operation friendliness. An adaptive droop control method is designed for the DC connection interfaces of the MMGs to adaptively manage the power exchange among the sub-microgrids. Meanwhile, the strategy of power fluctuation suppression is developed for the hybrid energy storage system (HESS) in the MMGs. The coordination among the sub-microgrids and the HESS is then clarified by the proposed control scheme to optimize the AC tie-line power and make the MMGs a highly coordinated collective. A case study is performed in PSCAD/EMTDC based on the demonstration project in Guangxi, China. The results show that the proposed multi-layer coordinated control scheme realizes the coordinated operation of the MMGs, fully exploits the complementarity of the MMGs, and improves the operation friendliness among the sub-microgrids and the utility grid. Thus the integration and utilization of a large number of DREs is enhanced.

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Section: System Architecturementioning

confidence: 99%

A Multi-Layer Coordinated Control Scheme to Improve the Operation Friendliness of Grid-Connected Multiple Microgrids

Huang

Tai

et al. 2019

Energies

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“…In recent years microgrids (MGs) are seen as an effective solution to increase penetration of distributed energy resources (DERs) into power system due to higher efficiency, economic impact, reliability, and better utilization of local resources 1‐4. The MG is defined as a group of DERs compromising energy storage systems (ESSs), responsive loads, and various distributed generations (DGs) such as diesel engines, micro turbines, wind turbines (WTs), photovoltaic panels (PVs), and fuel cells which are interconnected in a specific region of power system 5‐7.…”

Section: Introductionmentioning

confidence: 99%

A stochastic frequency security constrained optimization model for day‐ahead energy and reserve scheduling of islanded multi‐microgrids systems

Sarcheshmeh

Taher

Mazidi

2020

Int Trans Electr Energ Syst

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Summary Small size of microgrids (MGs), low inertia, and small scale of distributed generations, and high intermittent energy delivery of renewable generations, make the frequency security an important issue in the islanded multi‐microgrids (IMMG) systems which should be considered subject to the techno‐economic constraints of MGs. Motivated by this need, this article proposes a two‐stage stochastic optimization model for day‐ahead energy and reserve scheduling of IMMG systems. The objective of the proposed model is to minimize total operation cost of IMMG while the frequency security of system is preserved within a predefined range. To this end, the hierarchical frequency structure of IMMG system including primary, secondary, and tertiary control levels are precisely formulated in mixed‐integer linear programming format which can be efficiently solved by optimization software package. Meanwhile, to promote the proposed model, responsive loads and energy storage systems are considered in the energy and reserve scheduling problem. The proposed model is applied to a typical IMMG system to optimize energy and reserve scheduling over 24‐hr horizon. The obtained results verify that through the proposed model, the operation costs of MGs are minimized while frequency security of the system is preserved in a cost‐effective manner.

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“…The incorporation of Distributed Energy Sources (DES) such as wind turbines, photovoltaic (PV) and energy storage systems on the end user side has demonstrated significant potential to reduce the use of fossil fuels and consequent CO 2 emissions [3]. The interconnection of DES which behaves as a single entity as both a service provider to end customers and a customer to the utilities is termed as a microgrid [4]. Microgrids can be further categorized into AC and DC Microgrids.…”

Section: Introductionmentioning

confidence: 99%

System Configuration, Fault Detection, Location, Isolation and Restoration: A Review on LVDC Microgrid Protections

et al. 2019

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Low voltage direct current (LVDC) distribution has gained the significant interest of research due to the advancements in power conversion technologies. However, the use of converters has given rise to several technical issues regarding their protections and controls of such devices under faulty conditions. Post-fault behaviour of converter-fed LVDC system involves both active converter control and passive circuit transient of similar time scale, which makes the protection for LVDC distribution significantly different and more challenging than low voltage AC. These protection and operational issues have handicapped the practical applications of DC distribution. This paper presents state-of-the-art protection schemes developed for DC Microgrids. With a close look at practical limitations such as the dependency on modelling accuracy, requirement on communications and so forth, a comprehensive evaluation is carried out on those system approaches in terms of system configurations， fault detection, location, isolation and restoration.

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Microgrid clustering architectures

Cited by 187 publications

References 63 publications

A Multi-Layer Coordinated Control Scheme to Improve the Operation Friendliness of Grid-Connected Multiple Microgrids

A Multi-Layer Coordinated Control Scheme to Improve the Operation Friendliness of Grid-Connected Multiple Microgrids

A stochastic frequency security constrained optimization model for day‐ahead energy and reserve scheduling of islanded multi‐microgrids systems

System Configuration, Fault Detection, Location, Isolation and Restoration: A Review on LVDC Microgrid Protections

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