A Planar Layered Two-Phase System Model of Frequency Response of Insulation System for Estimating Moisture in IOCT

Wang, Qingpeng; Bai, Baojun; Chen, Dezhi; He, Xiaoyu

doi:10.1109/tmag.2017.2768600

Cited by 3 publications

(2 citation statements)

References 10 publications

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“…First, make the following assumptions in the IOCT main ins (1) The distance between the main insulation of IOCT and the gro the radial size of the head insulation layer, and the radial s larger than the thickness of the insulation layer and the local tion;…”

Section: Establishment Of Mtl Model Of Insulation Layermentioning

confidence: 99%

“…The operational reliability of current transformers is directly related to the security and stability of the power system. In particular, the safe operation of oil-immersed inverted current transformers, for high-speed rail traction networks, is a necessary condition to ensure the safe operation of high-speed rails [1]. Current transformers used in traction networks have a special working environment.…”

Section: Introductionmentioning

confidence: 99%

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The Study of VFTO Distribution in the Insulation System of IOCT Used in Traction Network

Luo

et al. 2022

Energies

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The FDS (Frequency-domain Dielectric Spectroscopy) of oil-immersed insulation paper, and semi-conductive paper with different moisture content, has been measured. The data measured are fitted as a function of frequency and moisture content using the amendatory Cole–Cole model utilizing the least square technique. Then, the broadband MTL model of the insulation system of IOCT (Inverted-type Oil-immersed Current Transformer) is established considering the capacitive electrodes thin layer, and the distribution parameters consider the moisture and frequency dependence. A new method for VFTO (Very Fast Transient Overvoltage) distribution calculation of insulation systems is proposed.

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Section: Establishment Of Mtl Model Of Insulation Layermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Study of VFTO Distribution in the Insulation System of IOCT Used in Traction Network

Luo

et al. 2022

Energies

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Cut‐set matrix methods for frequency response analysis curves of lumped parameter equivalent circuit model of three‐winding power transformer

Wang,

Xie

et al. 2023

Circuit Theory & Apps

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SummaryTo accurately and efficiently calculate the frequency response of the lumped parameter equivalent circuit model (LPECM) of a transformer winding is the basis for studying the simulation method of the frequency response analysis (FRA). In this paper, two different cut‐set matrix (CSM) methods, including fundamental cut‐set (FCS) and independent cut‐set (ICS) matrix methods, are proposed to calculate the FRA curves of the LPECM of a three‐winding power transformer. First, based on graph theory and electrical circuit laws, the basic CSM equation is deduced. Second, four different FCS matrix selection methods of the LPECM are introduced and the best FCS matrix is determined by deeply analyzing their characteristics. Then, an ICS matrix method is proposed to obtain the ICS of the LPECM. Furthermore, FCS and ICS are taken into the CSM equation to calculate the FRA results of the LPECM, respectively. Finally, the accuracy of the proposed methods is validated by Multisim software and the performance of these two methods is compared with node voltage matrix (NVM) method by analyzing the calculation time. The results show that FCS and ICS matrix methods both can be used to accurately obtain the FRA results of the LPECM of the three‐winding power transformer, but ICS is more simple than FCS matrix method due to avoiding the procedure for the selection of the tree. In addition, since ICS matrix method has the shortest running time among these methods, it can be used to improve the calculation efficiency of the FRA curves of the LPECM of a three‐winding power transformer.

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Design and experimental implementation of skewed stator structured PM generator using Multi-Objective Genetic Algorithm for gearless direct driven wind system

Topaloglu,

Bektaş,

Yiğit

et al. 2024

Ain Shams Engineering Journal

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A Planar Layered Two-Phase System Model of Frequency Response of Insulation System for Estimating Moisture in IOCT

Cited by 3 publications

References 10 publications

The Study of VFTO Distribution in the Insulation System of IOCT Used in Traction Network

The Study of VFTO Distribution in the Insulation System of IOCT Used in Traction Network

Cut‐set matrix methods for frequency response analysis curves of lumped parameter equivalent circuit model of three‐winding power transformer

Design and experimental implementation of skewed stator structured PM generator using Multi-Objective Genetic Algorithm for gearless direct driven wind system

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