Influence of Water Molecules on Polarization Behavior and Time–Frequency Dielectric Properties of Cellulose Insulation

Wen, Hao; Cheng, Lin; Jiang, Yi; Zhu, Taiyun; Chen, Zhong; Dai, Xin; Gao, Chenyu

doi:10.1007/s42835-021-00663-2

Cited by 7 publications

(5 citation statements)

References 24 publications

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“…In the Return Voltage Measurement method (RVM) [16][17][18] time-voltage parameters are determined via cyclic charging and discharging insulation with DC voltage, the values of which depend on moisture content and measurement temperature. Currently, the Frequency Domain Spectroscopy method (FDS) [19][20][21][22] is widely used. It determines the AC dielectric characteristics of the insulation.…”

Section: Introductionmentioning

confidence: 99%

Research on Changes in the Phase Shift Angle and Admittance of the Cellulose–Bio-Oil Composite under the Influence of Increasing Moisture during the Long-Term Operation of Power Transformers

Zukowski,

Kierczynski,

Okal

et al. 2023

Energies

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In this study, the temperature–frequency dependencies of the pressboard–bio-oil–water nanoparticle composite’s fundamental parameters—phase shift angle and admittance—were examined using the Frequency Domain Spectroscopy method. Measurements were conducted in a frequency range of 10−4 Hz to 5 × 103 Hz at temperatures ranging from 293.15 K to 343.15 K, with a step of 10 K. The temperature stabilization accuracy was less than ±0.05 K. A total of 15 Arrhenius plots were determined for various phase shift angle values, from which 15 values and the average activation energy of relaxation time were determined. Similarly, the values of the activation energy of admittance relaxation time and the activation energy of admittance were determined. It was established that all three average values are identical within the bounds of uncertainty. Based on 45 values, a generalized activation energy was determined, with a value of ΔW ≈ (1.032 ± 0.0196) eV. Using the generalized activation energy value, the phase shift angle curves determined for all temperatures were recalculated to a temperature of 293.15 K. It was found that after conversion, all curves perfectly overlap. A similar operation was carried out for the frequency dependencies of admittance. In this case, too, the recalculated dependencies perfectly match. This means that the shape of the frequency dependencies of the phase shift angle and admittance depends solely on the moisture content in the pressboard–bio-oil–water nanodrop composite. The position of the curves in doubly logarithmic coordinates depends only on temperature and is determined by the generalized activation energy Using the generalized activation energy determined in this study will allow for the development of accurate methods for estimating moisture content in cellulose insulation of power transformers containing bio-oil. This will contribute to the detection of critical moisture content, which is about 5% by weight, and to the elimination of the risk, associated with such a high moisture content, of catastrophic failure of power transformers.

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Section: Introductionmentioning

confidence: 99%

Research on Changes in the Phase Shift Angle and Admittance of the Cellulose–Bio-Oil Composite under the Influence of Increasing Moisture during the Long-Term Operation of Power Transformers

Zukowski,

Kierczynski,

Okal

et al. 2023

Energies

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“…Under the background of regular condition diagnosis of power equipment, frequency domain spectroscopy (FDS) technology, with the advantages of non-destructive testing and abundant insulation information, has been widely used in the diagnosis and evaluation of the insulation condition of power cables [8][9][10][11][12][13]. Guanjun Zhang et al studied the FDS (140 V RMS) on field cables by using the Havriliak-Negami (H-N) model, which shows that the polarisability, DC conductivity and hopping conductivity of cables with a deteriorated insulation state are greater than those with a normal insulation state [10]. Ji Liu et al carried out an FDS test (140 V RMS) on cables with different thermal ageing states and showed that dielectric loss can be correlated well with the thermal ageing degree [11].…”

Section: Introductionmentioning

confidence: 99%

“…Guanjun Zhang et al. studied the FDS (140 V RMS) on field cables by using the Havriliak–Negami (H–N) model, which shows that the polarisability, DC conductivity and hopping conductivity of cables with a deteriorated insulation state are greater than those with a normal insulation state [10]. Ji Liu et al.…”

Section: Introductionmentioning

confidence: 99%

“…Ji Liu et al carried out an FDS test (140 V RMS) on cables with different thermal ageing states and showed that dielectric loss can be correlated well with the thermal ageing degree [11]. However, results of the above studies show that the dielectric loss curves fluctuate in the test frequency range, which reduces the effectiveness of the FDS results [10,11]. This is because the traditional FDS technology with a low measurement voltage (RMS 140 V) is easy to be interfered by electromagnetic noise and so on, which results in the FDS curve fluctuation or negative value [12,14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Under the background of regular condition diagnosis of power equipment, frequency domain spectroscopy (FDS) technology, with the advantages of non‐destructive testing and abundant insulation information, has been widely used in the diagnosis and evaluation of the insulation condition of power cables [8–13]. Guanjun Zhang et al.…”

Section: Introductionmentioning

confidence: 99%

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High‐voltage frequency domain spectroscopy analysis of a thermally aged XLPE submarine cable under continuous and cyclic voltage based on carrier transport and polarisation characteristics

et al. 2021

Self Cite

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In order to ensure the safe operation of submarine cables, it is of great significance to analyse the insulation state of submarine cables from the perspectives of microstructure, carrier transport characteristics and macroscopic dielectric properties. In this study, based on the high-voltage frequency domain spectroscopy (HV-FDS) measurement system, HV-FDS experiments of fresh and thermally aged submarine cables were carried out under continuous (0.5, 2, 4 and 10 kV) and cyclic (2-10-2 kV) applied alternating voltages. Then, combining the changes of the microstructure structure of cross-linked polyethylene (XLPE) insulation, the aggregate structure deterioration model of XLPE was proposed to discuss the physical mechanism of HV-FDS characteristics of submarine cables under different voltages and insulation states. Results show that the HV-FDS characteristics of submarine cables have significant voltage dependence under continuous voltage excitation. The HV-FDS of submarine cables show memory characteristics under cyclic voltage excitation. Compared with the fresh submarine cable, the thermally aged submarine cable shows more significant voltage dependence and memory characteristics of HV-FDS. The memory characteristics of HV-FDS are mainly determined by the carriers transport and the interfacial polarisation caused by the accumulation of polar particles at the electrode/dielectric interface. This study covers the correlation mechanism among the microstructure, carrier transport and macroscopic HV-FDS properties of submarine cable insulation, which lays a foundation for further research and condition evaluation of submarine cables.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Multiscale Confinement‐Modulated Cellulosic Dielectric Materials for Energy Harvesting and Self‐Powered Devices

Huang,

Nong,

Zhang

et al. 2024

Adv Funct Materials

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The rapid rise of triboelectric nanogenerators, an innovative technology for low‐frequency energy harvesting and self‐powered sensing, has increased the interest in high‐performance triboelectric materials. Enhancing the surface charge density via dielectric modulation is essential for high‐performance triboelectric nanogenerators. As the most abundant biopolymer on earth, cellulose has remarkable properties such as excellent mechanical strength, thermal stability, and tunable surface chemistry, indicating its significant application potential in the design and fabrication of triboelectric nanogenerators. Owing to its unique multiscale structure and excellent processability, cellulose holds substantial promise for dielectric modulation. This review aims to provide comprehensive insights into the rational design and tailored preparation of cellulosic materials with optimal dielectric constants. First, the multiscale structure and exceptional advantages of cellulosic materials are interpreted. A comprehensive investigation into multiscale confinement‐modulated cellulosic dielectric materials encompassing cellulosic molecules, dipoles, and fibers along with their dipoles is undertaken and the significance of interfacial polarization is explored. Furthermore, the emerging applications of cellulosic materials with superior dielectric properties in triboelectric nanogenerators, including energy harvesting, self‐powered sensing, and self‐powered medical and smart monitoring systems, are described. Finally, the challenges and future opportunities for cellulosic dielectric modulation are summarized.

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Influence of Water Molecules on Polarization Behavior and Time–Frequency Dielectric Properties of Cellulose Insulation

Cited by 7 publications

References 24 publications

Research on Changes in the Phase Shift Angle and Admittance of the Cellulose–Bio-Oil Composite under the Influence of Increasing Moisture during the Long-Term Operation of Power Transformers

Research on Changes in the Phase Shift Angle and Admittance of the Cellulose–Bio-Oil Composite under the Influence of Increasing Moisture during the Long-Term Operation of Power Transformers

High‐voltage frequency domain spectroscopy analysis of a thermally aged XLPE submarine cable under continuous and cyclic voltage based on carrier transport and polarisation characteristics

Multiscale Confinement‐Modulated Cellulosic Dielectric Materials for Energy Harvesting and Self‐Powered Devices

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