Power electronic systems as a crucial part of Smart Grid infrastructure - a survey

Benysek, G.; Kaźmierkowski, Marian P.; Popczyk, J.; Strzelecki, Ryszard

doi:10.2478/v10175-011-0058-2

Cited by 44 publications

(32 citation statements)

References 50 publications

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“…This converter incorporates medium frequency transformer (MFT), that provides galvanic isolation between circuits, • Low Voltage DC-AC converter (LVC) converts LV DC to LV AC. Presented structure is only one of possible solutions, however, this structure is the most advantageous [2]. Although SST structure is much more complex compared to conventional transformer it may eliminate some of the disadvantages and add a completely new functionality that was not yet available, such as:…”

Section: Solid State Transformer Conceptmentioning

confidence: 99%

Review of multilevel converters for application in solid state transformers

Gajowik¹

2017

ELECTROTECHNICAL REVIEW

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This paper presents an overview of AC-DC, DC-AC and DC-DC power converter topologies used in the context of the application of solid state transformers. It describes the features of individual solutions, with an emphasis on multi-level topologies connected to the medium voltage AC grid, what allows to apply commonly available and relatively inexpensive low-voltage semiconductor switches. Such systems maintain high efficiency as well as high switching frequency, resulting in reduction of converter passive elements volume and weight as well as overall price. Streszczenie. Niniejszy artykuł przedstawia przegląd topologii przekształtników energoelektronicznych AC-DC oraz DC-DC, pod kątem zastosowania w energoelektronicznych transformatorach inteligentnych. Opisano w nim cechy poszczególnych rozwiązań, ze szczególnym naciskiem na przekształtniki wielopoziomowe, które pracując wraz z siecią elektroenergetyczną średniego napięcia (SN), umożliwiają zastosowanie standardowych i stosunkowo tanich niskonapięciowych łączników półprzewodnikowych, a także zmniejszenie rozmiarów, wagi i ceny transformatora. (Przegląd topologii przekształtników wielopoziomowych pod kątem zastosowania w inteligentnym transformatorze).

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Section: Solid State Transformer Conceptmentioning

confidence: 99%

Review of multilevel converters for application in solid state transformers

Gajowik¹

2017

ELECTROTECHNICAL REVIEW

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“…Standardization recommendations concerning instrument transformer do not specify requirements for estimation of their accuracy of distorted signals transformation or to calculate derating conditions [8][9]. Therefore, it is necessary to develop appropriate measuring methodology and standardization recommendations of instrument transformers metrological properties estimation for transformation of distorted signals and to estimate their primary current and/or secondary winding load derating levels in such conditions of operation [6,10]. In publications [11][12][13] and standard [14] problem of derating of transformers for non-sinusoidal load currents is discussed.…”

Section: Introductionmentioning

confidence: 99%

Estimation of the inductive current transformer derating for operation with distorted currents

Kaczmarek¹

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The aim of the paper is to present a new method for estimation of the CT (Current Transformer) rated primary current and / or load of the secondary winding derating levels for transformation of distorted current in relation to the rated values fixed for transformation of sinusoidal current. This ensures the values of the CT composite errors/transformer correction factors as resulting from its IEC 60044-1/IEEE C57.13 accuracy class in condition of distorted currents transformation.

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“…It can be eliminated by application of four-leg converter ( Fig. 1) [2,3], which gives possibility to precise control of neutral current. Moreover, such converter may be treated as three independent single-phase converters.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Control of Four-Leg Three-Level Grid-Connected Converter for RES

Kaźmierkowski

Sedlak

Styński

et al. 2014

Lecture Notes in Electrical Engineering

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Operation of the four-leg three-level flying capacitor Grid-Connected Converter (GCC) for renewable energy source (RES) is presented in this paper. The GCC with proposed hierarchical control method enables operation in presence of electrical grid disturbances by switching all legs separately to stand-alone or gridconnected mode of operation, allowing energy transfer between them. Four-leg flying capacitor GCC with described control method may be treated as DC microgrid supplied from three independent AC sources and RES. Therefore, the hierarchical control allows for effective power management of such system. The paper describes developed control system as well as presents simulation and experimental results measured on the 10 kVA laboratory converter.

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Power electronic systems as a crucial part of Smart Grid infrastructure - a survey

Cited by 44 publications

References 50 publications

Review of multilevel converters for application in solid state transformers

Review of multilevel converters for application in solid state transformers

Estimation of the inductive current transformer derating for operation with distorted currents

Hierarchical Control of Four-Leg Three-Level Grid-Connected Converter for RES

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