Distribution Transformer with Multi-Zone Voltage Regulation for Smart Grid System Application

Strzelecki, Ryszard; Matelski, Wojciech; Małkowski, Robert; Tomasov, Valentin; Wolski, Leszek; Krahel, Antoni

doi:10.1109/ess.2019.8764193

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…Tap changers commutation systems allow us to add an offset into the voltage regulation in steps, without an increase in the power converter rating. The operating region of this alternative is shown in Figure 14b [96,101]. When utilizing HDT configurations that are able to inject unrestricted active and reactive power, the operating vector can be represented, as shown in Figure 14c.…”

Section: Use Of Tap Changers Systems To Extend the Hdt Operating Regionmentioning

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: Use Of Tap Changers Systems To Extend the Hdt Operating Regionmentioning

confidence: 99%

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

et al. 2021

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“…The associate editor coordinating the review of this manuscript and approving it for publication was Yu Liu . load), failures of distribution transformer have a serious impact on the reliability and operational stability of the electric power system [5], [6]. Many factors may have an impact on the life of distribution transformer, e.g.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Life Cycle of Distribution Transformer in Context to Furan Content Formation, Pollution Index, and Dielectric Strength

Soni¹,

Chakrabarti²,

Leonowicz

et al. 2021

IEEE Access

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Distribution transformer is the most vital component in the power system. Failure of a transformer leads to loss of revenue besides affecting the reliability of power supply to consumers. It can lead to the non-availability of the transformer for a long duration. Due to this, it is important to maintain the good quality of mineral oil. Thus, if the quality of the mineral oil is reduced then its dielectric strength/quality is degraded. Finally, it can affect the services of the transformer, in terms of continuity of power supply. This paper entails the development of a mathematical MATLAB/Simulink model which able to calculate the life cycle of distribution transformer and exact oil changing frequency. With the help of proposed Matlab/Simulink models, the plot curves between furan content formation versus time, pollution index versus time, and dielectric strength of oil versus time are also prepared. The article methodology uses the newly proposed equations, that are in accordance with IEEE standards: IEEE Guide for Loading Mineral-Oil-Immersed Transformers and Step-Voltage Regulators (IEEE Std. C57.91-2011) and IEEE Guide for the Reclamation of Insulating Oil and Criteria for Its Use (IEEE Std C57.637-2015). Then the case study for a 100 kVA distribution transformer is realized. So, with the input values in the Simulink model of load current of the transformer, dielectric constant of oil and flash point of oil we can estimate the life of the distribution transformer. Harmonic load factor in our research work is not included, in order to reduce influence of harmonic load we need to installed the active filter, which is not covered in this paper.

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An Overview of Bidirectional EV Chargers: Empowering Traction Grid-Powered Chargers

Lukianov,

Verbitsky,

Cadaval

et al. 2023

Studies in Systems, Decision and Control

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Distribution Transformer with Multi-Zone Voltage Regulation for Smart Grid System Application

Cited by 6 publications

References 16 publications

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

Configurations, Power Topologies and Applications of Hybrid Distribution Transformers

Estimation of Life Cycle of Distribution Transformer in Context to Furan Content Formation, Pollution Index, and Dielectric Strength

An Overview of Bidirectional EV Chargers: Empowering Traction Grid-Powered Chargers

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