Protection Schemes of Meshed Distribution Networks for Smart Grids and Electric Vehicles

Lazarou, Stavros; Vita, Vasiliki; Ekonomou, Lambros

doi:10.3390/en11113106

Cited by 16 publications

(8 citation statements)

References 104 publications

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“…The use of this DC link is advantageous when compared to a conventional meshed operation, where the active and reactive loop flows cannot be controlled. In addition, the meshed operation requires an expensive protection system to cope with short-circuit faults [32]. On the one hand, the short-circuit current increases as both interconnected feeders contribute to the fault current.…”

Section: Utility-scale Power Electronic Devicesmentioning

confidence: 99%

Ancillary Services in Hybrid AC/DC Low Voltage Distribution Networks

et al. 2019

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In the last decade, distribution systems are experiencing a drastic transformation with the advent of new technologies. In fact, distribution networks are no longer passive systems, considering the current integration rates of new agents such as distributed generation, electrical vehicles and energy storage, which are greatly influencing the way these systems are operated. In addition, the intrinsic DC nature of these components, interfaced to the AC system through power electronics converters, is unlocking the possibility for new distribution topologies based on AC/DC networks. This paper analyzes the evolution of AC distribution systems, the advantages of AC/DC hybrid arrangements and the active role that the new distributed agents may play in the upcoming decarbonized paradigm by providing different ancillary services.

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Section: Utility-scale Power Electronic Devicesmentioning

confidence: 99%

Ancillary Services in Hybrid AC/DC Low Voltage Distribution Networks

et al. 2019

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“…Electric vehicles, storage systems, and distributed generation of RES are transforming distribution grid characteristics around the world [4,5]. Under certain operational settings, these novel components could create bidirectional energy flows.…”

Section: Introduction 1smart Grids and Renewable Energy Sourcesmentioning

confidence: 99%

Scalability and Replicability for Smart Grid Innovation Projects and the Improvement of Renewable Energy Sources Exploitation: The FLEXITRANSTORE Case

et al. 2022

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In this paper, detailed scalability and replicability plans have been developed to facilitate the adoption of innovation technologies in the pan-EU market. Smart grid development must enable both information and power exchange between suppliers and customers, thanks to the enormous innovation in intelligent communication, monitoring, and management systems. Implementing physical infrastructure alone is not enough, but a smart grid must include new business models and new regulations. In recent years, the number, participants, and scope of smart grid initiatives have increased, with different goals and results. FLEXITRANSTORE project integrates hardware and software solutions in all areas of the transmission system and wholesale markets, unleashing the potential for full flexibility of power systems and promoting the penetration of renewable energy sources and pan-EU markets. Full deployment of these demonstrated solutions requires a reasonable level of scalability and replicability to prevent project demonstrators from continuing local experimental exercises. Scalability and replicability are fundamental requirements for successful scaling-up and replication. Therefore, scalability and replicability enable or at least reduce barriers to the growth and reuse of project demonstrator results.

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“…A number of underlying difficulties were highlighted: the lack of fault current from inverter-interfaced generation [4], the varying fault current when transitioning from grid-connected to islanded mode [4], and the potential for normally meshed operation [5] and unbalanced operation due to single-phase loads [5]. Potential solutions, some with severe limitations, have been proposed for these challenges over the years [6].…”

Section: Introductionmentioning

confidence: 99%

Optimization-Based Formulations for Short-Circuit Studies with Inverter-Interfaced Generation in PowerModelsProtection.jl

et al. 2021

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Protecting inverter-interfaced microgrids is challenging as conventional time-overcurrent protection becomes unusable due to the lack of fault current. There is a great need for novel protective relaying methods that enable the application of protection coordination on microgrids, thereby allowing for microgrids with larger areas and numbers of loads while not compromising reliable power delivery. Tools for modeling and analyzing such microgrids under fault conditions are necessary in order to help design such protective relaying and operate microgrids in a configuration that can be protected, though there is currently a lack of tools applicable to inverter-interfaced microgrids. This paper introduces the concept of applying an optimization problem formulation to the topic of inverter-interfaced microgrid fault modeling, and discusses how it can be employed both for simulating short-circuits and as a set of constraints for optimal microgrid operation to ensure protective device coordination.

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Protection Schemes of Meshed Distribution Networks for Smart Grids and Electric Vehicles

Cited by 16 publications

References 104 publications

Ancillary Services in Hybrid AC/DC Low Voltage Distribution Networks

Ancillary Services in Hybrid AC/DC Low Voltage Distribution Networks

Scalability and Replicability for Smart Grid Innovation Projects and the Improvement of Renewable Energy Sources Exploitation: The FLEXITRANSTORE Case

Optimization-Based Formulations for Short-Circuit Studies with Inverter-Interfaced Generation in PowerModelsProtection.jl

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