Evaluation of topologies and optimal design of a hybrid distribution transformer

Burkard, Johannes; Biela, J.

doi:10.1109/epe.2015.7309097

Cited by 68 publications

(42 citation statements)

References 15 publications

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“…The group and central compensation allow the use compensators for a selected industrial plants, buildings or parts of the power network. In addition, the concept of various hybrid transformers has been proposed as a compensator in AC voltage amplitude changes [6]- [10]. HT is devices where a conventional electromagnetic transformer cooperates with a pulse-width modulation (PWM) AC/AC converter.…”

Section: Introductionmentioning

confidence: 99%

Model Predictive Control of Hybrid Transformer with Matrix Converter

Szcześniak¹,

Tadra²,

Fedyczak³

2020

ACTA POLYTECH HUNG

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This paper proposes a model predictive control for a hybrid transformer (HT) with matrix converter (MC). The proposed HT system is composed of a power transformer connected to a power electronic converter which controls the output voltage on the secondary side. The proposed solution of HT is used to resolve power quality issues and power flow control in the electrical power distribution system. The advantages of predictive control are its very simple realization and the possibility to optimize various predefined criteria. Presented in the paperr is a discussion of the conception of a model predictive control strategy to compensate for voltage sags, swells and harmonics on the grid side by providing continuous AC voltage regulation of the HT. Also, presented are the preliminary simulation results, which verify the high performance of the proposed predictive control.

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Section: Introductionmentioning

confidence: 99%

Model Predictive Control of Hybrid Transformer with Matrix Converter

Szcześniak¹,

Tadra²,

Fedyczak³

2020

ACTA POLYTECH HUNG

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“…A competitive alternative to the presented above AVR solutions, are hybrid transformers (HT) [9], combining the features of a conventional transformer and the regulatory capabilities of modern power converters. In this case, the converter, enabling smooth and instantaneous voltage adjustment, is designed to convert only a fraction of the transferred power.…”

Section: Introductionmentioning

confidence: 99%

“…Comparison of volume, losses, cost and controllability for power electronic arrangements of AVR technology referenced to standard distribution transformer [9] HT systems are devoid of the above mentioned disadvantages. The regulator function is satisfied by the back-to-back voltage converter [9,16]. This feature makes it possible to separate a DC circuit, which can be the connection point for energy storage or DC sources, e.g.…”

Section: Introductionmentioning

confidence: 99%

Hybrid stepless distribution transformer with four-quadrant AC/DC/AC converter at low voltage side - simulation tests

Strzeleck¹

2018

ELECTROTECHNICAL REVIEW

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The article presents the work of the stepless hybrid distribution transformer (HT), as an alternative to the so far applied Automatic Voltage Regulator (AVR) solutions, used to control the voltage in the power system in terms of the fundamental harmonic. The HT is a combination of a conventional distribution transformer and an AC/DC/AC converter connected in series with the transformers secondary winding. In the work the basic control algorithm of the AC/DC/AC converter operated as a series connected additive voltage source in the HT system, has been described. The article contains the preliminary results of computer simulation studies of the model elaborated in PSIM. Streszczenie. W artykule opisano działanie bezstopniowego hybrydowego transformatora dystrybucyjnego (HT), jako alternatywę dla dotychczas stosowanych rozwiązań AVR (Automatic Voltage Regulator), służących do kontroli poziomu napięcia w systemie elektroenergetycznym w zakresie podstawowej harmonicznej. Układ HT to połączenie konwencjonalnego transformatora dystrybucyjnego oraz przekształtnika AC/DC/AC włączonego w szereg z uzwojeniem wtórnym transformatora. W pracy przedstawiono podstawowy algorytm sterowania przekształtnikiem AC/DC/AC jako szeregowe źródło napięcia dodawczego w układzie badanego HT. Artykuł zawiera wstępne wyniki badań symulacyjnych modelu opracowanego w programie PSIM. (Hybrydowy bezstopniowy transformator dystrybucyjny z czterokwadrantowym przekształtnikiem AC/DC/AC po stronie niskiego napięcia-badania symulacyjne).

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“…The literature describes a few concepts of HT with shunt connected converters, series connected converters and a combination of series and shunt connected converters [11][12][13]. The conception of the HT presented in this paper is based on a structure with a series connected converter.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, several similar solutions of AC voltage controllers for compensation of overvoltage and voltage sags (also based on the HT) are proposed in [10,11,13,[17][18][19][20][21]. In the HT solution proposed in [11,17] the PWM AC/AC matrix and matrix-reactance choppers are used [15].…”

Section: Introductionmentioning

confidence: 99%

A modelling of AC voltage stabilizer based on a hybrid transformer with matrix converter

Szcześniak

2017

Archives of Electrical Engineering

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This article presents a study of an AC voltage stabilizer based on a three-phase hybrid transformer combined with a matrix converter. The proposed solution is used to control AC voltage amplitude and phase shift. By adjustment of these voltage parameters we can reduce the effects of overvoltage, voltage dips or lamp flicker. Such negative phenomena are very significant, particularly from the perspective of the final consumer and sensitive loads connected to the power network. Often the voltage in the power system can be adjusted using a mechanical or thyristor controlled regulator, which in a stepwise manner switches the taps of the electromagnetic transformer. The method for obtaining continuous control of the voltage magnitude and phase shift with the use of a conventional transformer with two output windings and a matrix converter is presented in this paper. The operating principles, mathematical model and properties of the proposed voltage stabilizers are discussed in this paper. The main part of the article will be devoted to the mathematical model which is based on an averaged equation. Computer simulation results are presented and compared with the results of a mathematical study.

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Evaluation of topologies and optimal design of a hybrid distribution transformer

Cited by 68 publications

References 15 publications

Model Predictive Control of Hybrid Transformer with Matrix Converter

Model Predictive Control of Hybrid Transformer with Matrix Converter

Hybrid stepless distribution transformer with four-quadrant AC/DC/AC converter at low voltage side - simulation tests

A modelling of AC voltage stabilizer based on a hybrid transformer with matrix converter

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