Evaluating the technical benefits of AC–DC hybrid distribution systems consisting of solid-state transformers using a multiobjective index

Fotoohabadi, Hadi; Mohammadi, Mohammad

doi:10.1016/j.segan.2019.100224

Cited by 10 publications

(16 citation statements)

References 24 publications

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“…In this context, special attention is paid to the Dual Active Bridge (DAB) (i.e., a bidirectional DC/DC converter with identical full bridges on its primary and secondary side and a high frequency transformer being the set of power electronics responsible for converting MVDC to LVDC in a three-stage SST), the minimization of the core's volume, losses and cost, and the optimal incorporation of the three-stage SST in modern applications [30,31]. Such applications include a wide range of scales, from smart buildings up to entire distribution systems [32][33][34].…”

Section: Interface With the Ac Gridmentioning

confidence: 99%

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State of the Art of Low and Medium Voltage Direct Current (DC) Microgrids

et al. 2021

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Direct current (DC) microgrids (MG) constitute a research field that has gained great attention over the past few years, challenging the well-established dominance of their alternating current (AC) counterparts in Low Voltage (LV) (up to 1.5 kV) as well as Medium Voltage (MV) applications (up to 50 kV). The main reasons behind this change are: (i) the ascending amalgamation of Renewable Energy Sources (RES) and Battery Energy Storage Systems (BESS), which predominantly supply DC power to the energy mix that meets electrical power demand and (ii) the ascending use of electronic loads and other DC-powered devices by the end-users. In this sense, DC distribution provides a more efficient interface between the majority of Distributed Energy Resources (DER) and part of the total load of a MG. The early adopters of DC MGs include mostly buildings with high RES production, ships, data centers, electric vehicle (EV) charging stations and traction systems. However, the lack of expertise and the insufficient standards’ framework inhibit their wider spread. This review paper presents the state of the art of LV and MV DC MGs in terms of advantages/disadvantages over their AC counterparts, their interface with the AC main grid, topologies, control, applications, ancillary services and standardization issues. Overall, the aim of this review is to highlight the possibilities provided by DC MG architectures as well as the necessity for a solid/inclusive regulatory framework, which is their main weakness.

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Section: Interface With the Ac Gridmentioning

confidence: 99%

“…Although its deployment is quite rare, several researchers have studied the capabilities that it provides. For instance, in [33,44,45], DC MGs with mesh configurations are presented. More specifically, in [45] an interesting aspect regarding the architecture of MGs is developed.…”

Section: Meshmentioning

confidence: 99%

State of the Art of Low and Medium Voltage Direct Current (DC) Microgrids

et al. 2021

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“…Figure 9 shows an example of a wind energy system. [87][88][89][90] In these systems, a reactive power compensator may be needed to stabilize the voltage. However, by using and combining functions of SST such as active power transmission, reactive power compensation, and voltage regulation, a F I G U R E 5 SST applied to the distribution network 81 modern wind energy system similar to that shown in Figure 9 can be created, where SST has effectively replaced the two conventional transformers and STATCOM and internal capacitors.…”

Section: Voltage Stabilization and Regulationmentioning

confidence: 99%

“…SSTs are essentially replacing power electronic converters and low‐frequency transformers to achieve a more compact system. Figure 9 shows an example of a wind energy system 87‐90 …”

Section: Solid‐state Transformer Applicationsmentioning

confidence: 99%

Solid‐state transformers: An overview of the concept, topology, and its applications in the smart grid

Shadfar

Pashakolaei

Foroud

2021

Int Trans Electr Energ Syst

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The development of power systems and the move to smart grid have increased the need for new technologies. In this regard, solid-state transformers have been proposed as a suitable alternative to conventional transformers. Solidstate transformers are among the equipment based on power electronic converters that in addition to better performance than conventional transformers provide a variety of other services. In this article, the concept and types of solid-state transformer topologies and configurations and their applications, especially in smart grid, are investigated. Studies show that the various characteristics of solid-state transformers have led to much consideration as potential transformers in smart grid applications, the integration of distributed generation sources, modern traction systems, and so on.

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“…Lately, a SST customized to provide ancillary services to the distribution grid has been attracting much of interest. 7,8 The SST was envisaged as a substitution for the conventional fundamental frequency power transformer, with subordinated volume and weight but is capable of wider applications like energy routing capabilities, RPS, and fault tolerance. 9,10 On account of this, the SST paves a contemporary path into DN integration, further sketching out the unexplored preferences that they offer.…”

Section: Introductionmentioning

confidence: 99%