An Integrated Controllable Network Transformer—Hybrid Active Filter System

Das, Debrup; Kandula, Rajendra Prasad; Muñoz, Javier; Divan, Deepak; Harley, R.G.; Schatz, Joe

doi:10.1109/tia.2014.2350081

Cited by 19 publications

(12 citation statements)

References 29 publications

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“…The nature of the AC chopper converters preserves the phase of the input voltage, without allowing us to modify the output voltage phase. Nonetheless, utilizing techniques based on harmonics injections, it is possible to shift the fundamental voltage to provide power flow control and act as a active power filter as well [70,71]. The same idea can be applied in Figure 4b, where the power converter is connected to the primary-side and neutral-side taps.…”

Section: Additional Hdt Configurationsmentioning

confidence: 99%

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

et al. 2021

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Distribution systems are under constant stress due to their highly variable operating conditions, which jeopardize distribution transformers and lines, degrading the end-user service. Due to transformer regulation, variable loads can generate voltage profiles out of the acceptable bands recommended by grid codes, affecting the quality of service. At the same time, nonlinear loads, such as diode bridge rectifiers without power factor correction systems, generate nonlinear currents that affect the distribution transformer operation, reducing its lifetime. Variable loads can be commonly found at domiciliary levels due to the random operation of home appliances, but recently also due to electric vehicle charging stations, where the distribution transformer can cyclically vary between no-load, rated and overrated load. Thus, the distribution transformer can not safely operate under highly-dynamic and stressful conditions, requiring the support of alternative systems. Among the existing solutions, hybrid transformers, which are composed of a conventional transformer and a power converter, are an interesting alternative to cope with several power quality problems. This article is a review of the available literature about hybrid distribution transformers.

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Section: Additional Hdt Configurationsmentioning

confidence: 99%

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

et al. 2021

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“…Several approaches have been presented in literature to integrate power processing functionalities into a transformer which allow series voltage compensation [14] [15] [16], shunt reactive power compensation [17], series harmonic passive filtering [18], series power flow control [19], transformer core sharing by multi-shunt power converters [20], power converter filter inductance integration [21], controllable reactor transformer [22], series fractional power converter integration [23], series harmonic passive filtering [24], wound rotor induction machine based power flow control [25], converter passive filter integration [26] and shunt magnetic path integration [27]. However, such compensation devices have explored a single type of compensation (series or shunt) and/or operate for a specific application.…”

Section: Summary Of Integrated Compensation Systemsmentioning

confidence: 99%

Custom Power Active Transformer for Flexible Operation of Power Systems

Elsaharty

Candela

Rodríguez

2018

IEEE Trans. Power Electron.

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ADVERTIMENT La consulta d'aquesta tesi queda condicionada a l'acceptació de les següents condicions d'ús: La difusió d'aquesta tesi per mitjà del r e p o s i t o r i i n s t i t u c i o n a l UPCommons (http://upcommons.upc.edu/tesis) i el repositori cooperatiu TDX ( h t t p : / / w w w . t d x . c a t / ) ha estat autoritzada pels titulars dels drets de propietat intel·lectual únicament per a usos privats emmarcats en activitats d'investigació i docència. No s'autoritza la seva reproducció amb finalitats de lucre ni la seva difusió i posada a disposició des d'un lloc aliè al servei UPCommons o TDX. No s'autoritza la presentació del seu contingut en una finestra o marc aliè a UPCommons (framing). Aquesta reserva de drets afecta tant al resum de presentació de la tesi com als seus continguts. En la utilització o cita de parts de la tesi és obligat indicar el nom de la persona autora.ADVERTENCIA La consulta de esta tesis queda condicionada a la aceptación de las siguientes condiciones de uso: La difusión de esta tesis por medio del repositorio institucional UPCommons (http://upcommons.upc.edu/tesis) y el repositorio cooperativo TDR (http://www.tdx.cat/?locale-attribute=es) ha sido autorizada por los titulares de los derechos de propiedad intelectual únicamente para usos privados enmarcados en actividades de investigación y docencia. No se autoriza su reproducción con finalidades de lucro ni su difusión y puesta a disposición desde un sitio ajeno al servicio UPCommons No se autoriza la presentación de su contenido en una ventana o marco ajeno a UPCommons (framing). Esta reserva de derechos afecta tanto al resumen de presentación de la tesis como a sus contenidos. En la utilización o cita de partes de la tesis es obligado indicar el nombre de la persona autora.WARNING On having consulted this thesis you're accepting the following use conditions: Spreading this thesis by the i n s t i t u t i o n a l r e p o s i t o r y UPCommons

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“…The rating of the converter can be designed to be lower than the rating of the load. On e stage AHSST structure that is studied in [14][15][16][17][18] consists of AC/AC converter that is shown in Figure 3. The AC/AC converter controls the magnitude of the output voltage that is average value of the tap voltage to control primary side voltage of the tap transformer.…”

Section: Active Hybrid Solid State Transformermentioning

confidence: 99%

“…Also, in the case of a distribution transformer, since the primary side voltage is very high and the current is very small as compared to the secondary side, so the power that AHSST has to handle is very small. Therefore, it Active hybrid solid state transformer (AHSST), as shown in Figure 2, has been researched to overcome these drawbacks [14][15][16][17]. AHSST is called a controllable network transformer, flexible transformer is a system which combines the conventional tap transformer and power converter that can perform the functions of SST.…”

Section: Introductionmentioning

confidence: 99%

Active Hybrid Solid State Transformer Based on Multi-Level Converter Using SiC MOSFET

Yun

Cho

2018

Energies

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As the types of loads have been diversified and demand has increased, conventional distribution transformers are difficult to maintain the constant voltage against voltage drop along with distance, grid voltage swell/sag, and various loads. Also, it is hard to control the power flow when connecting renewable energy sources. Active hybrid solid state transformer (AHSST) is application to keep the voltage and power quality. AHSST is a system that combines conventional distribution transformer and converter. Accordingly, it can be applied directly to distribution infrastructure and it has both the advantages of solid state transformer (SST) and conventional transformer. AHSST is capable of active voltage and current control and power factor control. It has a simpler structure than SST and it can perform the same performance with the lower rating converter. This paper presents two stage AHSST system based on multi-level converter. The converter is composed of the back-to-back converter using silicon carbide (SiC) metal-oxide semiconductor field effect transistor (MOSFET). Proposed system has a wider voltage and power flow control range, lower filter size, and simpler control sequence than existing AHSST systems. The performance of the proposed system was verified by prototype system experiments.

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An Integrated Controllable Network Transformer—Hybrid Active Filter System

Cited by 19 publications

References 29 publications

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

Custom Power Active Transformer for Flexible Operation of Power Systems

Active Hybrid Solid State Transformer Based on Multi-Level Converter Using SiC MOSFET

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