Thyristor based solid state tap changer for distribution transformers

Martinez, Egoitz; Fernandez, Iosu; Canales, José María Flores

doi:10.1109/ecmsm.2013.6648942

Cited by 8 publications

(5 citation statements)

References 2 publications

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“…4(a), the voltage sum of bias windings and equalizer windings is equal to the tap voltage as (9). By solving ( 2), (3), and ( 9), bias winding voltages are derived as (10).…”

Section: Circuit Analysis and Controlmentioning

confidence: 99%

“…But the vacuum chamber takes much space and is not suitable for occasions where installation space is limited. With the development of semiconductor devices, solid-state bidirectional switches are proposed to cut off current without arcing [9], [10], [11], [12], [13]. Hybrid switches are also proposed to lower down the conduction loss [14], [15].…”

Section: Introductionmentioning

confidence: 99%

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A High-Efficiency Low-Wearing Hybrid Voltage Regulator for Utility Applications

Wang

Zhao

2023

IEEE Open J. Ind. Applicat.

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Step voltage regulator (SVR) has been utilized in power distribution systems for decades as the voltage regulation device. Due to the increasing integration of distributed energy resources, the conventional SVR is severely challenged by the modern power distribution pattern with high renewable energy penetration. The induced arc from the conventional SVR tap change and more frequent tap changes due to voltage instability from the renewable energy impose constraints on the conventional SVRs lifetime. Meanwhile, the conventional SVR device cannot regulate the voltage accurately since the SVR regulates the voltage step-bystep. This article proposed a hybrid voltage regulator with high-efficiency and low contact wearing, which can achieve arcless tap change and stepless voltage regulation by using a fractionally rated back-to-back power converter. The accurate load voltage regulation is guaranteed, while the tap changer mechanism remains in the system, which helps to promote the upgrade to the existing power distribution systems. The power converter capacity in the proposed topology is only 0.31% of the distribution transformer rating to achieve a stepless voltage regulation range of ±10%, significantly reducing the system cost compared with the full power electronics solutions and projects high total system efficiency. The proposed hybrid voltage regulator was simulated and experimentally validated. The experimental results demonstrate arcless tap change operation and stepless voltage regulation. Collaborative operation between the conventional mechanical tap change and the power converter operation is also demonstrated to acquire large voltage regulation with fast-acting voltage control.

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“…4(a), the voltage sum of bias windings and equalizer windings is equal to the tap voltage as (9). By solving ( 2), (3), and ( 9), bias winding voltages are derived as (10).…”

Section: Circuit Analysis and Controlmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A High-Efficiency Low-Wearing Hybrid Voltage Regulator for Utility Applications

Wang

Zhao

2023

IEEE Open J. Ind. Applicat.

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“…To eliminate this effect another method is utilized that is electronic tap changer voltage control method. Further, Figure 4 represents the considered electronic tap changer that was taken from 22 …”

Section: Modeling Of Ev Fast Ac Charging Station Systemmentioning

confidence: 99%

Design, simulation and analysis of a fast charging station for electric vehicles

2021

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With the advent of Electric Vehicles into existence, there is a need to develop a significantly charging infrastructure that will make electric cars more attractive and lead to higher adoption rates. In light of the increasing demand for EVs, there is a need to develop a fast‐charging station that cuts back on the charging time and hence overcome range anxiety. Fast charging stations are capable of reducing the charging duration by up to 30 min. By way of sustainable development and availability of secure energy, the focus of the paper is to develop the fast charging station of various Electric vehicles/Plug‐in Hybrid Electric vehicles as per the grid power supply and their worldwide implementation. In this paper, we have designed a system for the fast charging of electric vehicles in which we provide continuous feedback to the dc‐dc converter considering the battery SOC by using a battery pack control module and tuning the PI controller. To reduce the fluctuation in input supply, we have studied and implemented a cosine firing scheme based voltage regulator and electronic tap changer (ETC) out of which ETC provides a very promising solution. Further, the impact of charging with time on battery resistance has also been discussed.

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“…Power semiconductors include a thyristor, TRIAC, and an insulated gate bipolar transistor (IGBT). The SVR using a thyristor, named a thyristor voltage regulator (TVR), has been developed and applied to long distribution lines until now because it has relatively high power and high voltage ratings compared to other devices [10,11].…”

Section: Introductionmentioning

confidence: 99%

Design of Step Voltage Regulator Based on IGBT

Lee,

Kim,

Park

et al. 2024

Energies

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The introduction of distributed generation (DG) into distribution systems is expanding due to carbon neutral policies. DG with intermittent output characteristics brings frequent voltage variations in distribution systems. Generally, a step voltage regulator (SVR) is installed in the long distribution line and controls its voltage, which has limits of stable voltage regulations due to the slow tap-changing rate, switching losses, and short life span. To solve those problems, this paper proposes an IGBT-based SVR using zero-voltage switching. It is verified that the stable operation can be obtained through simulation by PSCAD/EMTDC 4.6 software and empirical experiments.

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Thyristor based solid state tap changer for distribution transformers

Cited by 8 publications

References 2 publications

A High-Efficiency Low-Wearing Hybrid Voltage Regulator for Utility Applications

A High-Efficiency Low-Wearing Hybrid Voltage Regulator for Utility Applications

Design, simulation and analysis of a fast charging station for electric vehicles

Design of Step Voltage Regulator Based on IGBT

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