Space Charge Measurement of Thick Insulating Materials

Li, Xiaoxin; Utagawa, Masaki; Yeongguk, An; Kawashima, T.; Murakami, Yoshinobu; Hozumi, Naohiro

doi:10.1109/icd53806.2022.9863494

Cited by 3 publications

(4 citation statements)

References 7 publications

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“…Another development affects the length of the measured cable, TSM can provide measurements over 50 cm of cable length by using OCT/OHT or on a full cable length by using IHT [47], whereas PEA with single sensor can be only applied on a thin layer of the cable in the range of cm depending on the acoustic sensor diameter [48]. In [49,50], PEA was used for measuring SC in a thick joint using a 2D multichannel sensor array to scan the longitudinal SC distribution in a length comparable to that of TSM. In [51], authors proposed a numerical model for calibration and interpretation of PEA measurement signals without applying a deconvolution algorithm.…”

Section: Pea Calibration and Measurement Techniquesmentioning

confidence: 99%

“…• Due to the complex geometry of the joint, PEA measurements are required along the length of the joint. This challenge can be addressed by placing an array of sensors along the length of the joint and reading the detected signals consecutively, as is shown in Figure 7 and Figure 8 [50].…”

Section: Acoustic Impedance Classic (Aluminum Coupler and Polymeric B...mentioning

confidence: 99%

“…Figure 7 -PEA system with sensor array, allowing space charge measurement along the length of the joint [50].…”

Section: Acoustic Impedance Classic (Aluminum Coupler and Polymeric B...mentioning

confidence: 99%

“…Figure 8 -Space charge profiles in a model joint obtained with the sensor array and polymeric acoustic coupler [50]. Please note that the color intensity is arbitrary.…”

Section: Acoustic Impedance Classic (Aluminum Coupler and Polymeric B...mentioning

confidence: 99%

See 3 more Smart Citations

Feasibility of Space Charge Measurements on HVDC Cable Joints: Study Group—IEEE DEIS Technical Committee “HVDC Cable and Systems:”

Tzimas

Diban

Boyer

et al. 2022

IEEE Electr. Insul. Mag.

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Section: Pea Calibration and Measurement Techniquesmentioning

confidence: 99%

Section: Acoustic Impedance Classic (Aluminum Coupler and Polymeric B...mentioning

confidence: 99%

“…Figure 7 -PEA system with sensor array, allowing space charge measurement along the length of the joint [50].…”

Section: Acoustic Impedance Classic (Aluminum Coupler and Polymeric B...mentioning

confidence: 99%

“…Figure 8 -Space charge profiles in a model joint obtained with the sensor array and polymeric acoustic coupler [50]. Please note that the color intensity is arbitrary.…”

Section: Acoustic Impedance Classic (Aluminum Coupler and Polymeric B...mentioning

confidence: 99%

See 2 more Smart Citations

Feasibility of Space Charge Measurements on HVDC Cable Joints: Study Group—IEEE DEIS Technical Committee “HVDC Cable and Systems:”

Tzimas

Diban

Boyer

et al. 2022

IEEE Electr. Insul. Mag.

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Space Charge Measurement Techniques for Practical Insulation Systems

Hozumi

2023

2023 IEEE 4th International Conference on Electrical Materials and Power Equipment (ICEMPE)

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Analysis of Space Charge Signal Spatial Resolution Determined with PEA Method in Flat Samples including Attenuation Effects

Florkowski

Kuniewski

2023

Energies

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The constant development of the electrical engineering sector, especially in the transmission of electrical energy under high-voltage direct current (HVDC), requires research on new insulation materials and investigations of physical phenomena under ultrahigh electrical fields in solid dielectrics. One of the current problematic issues is the formation of space charge in HV insulation systems, which affects the operational electrical field distribution and can lead to faster insulation degradation. There are several problems that have to be considered before every space charge measurement, such as the attenuation and dispersion of sound waves in tested dielectric materials, reflections at the interfaces, and the spatial resolution of the measured charge profile. The spatial resolution is one of the most important technical factors of the PEA measurement stand. The spatial resolution, as it is assumed, depends on several factors, such as the width of the pulser and the pulse rise time, the thickness of the piezoelectric sensor, and the dispersion of the tested material. The article presents the laboratory measurement results of the impact of pulser parameters, such as pulse width and rise time, and sensor thickness on the equivalent thickness of the measured net charge layer corresponding to the resolution of the method. The dispersion in the tested LDPE material is also presented and analysed. The results show that with an increase in the pulser rise time, a higher resolution of the pea method can be achieved.

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Space Charge Measurement of Thick Insulating Materials

Cited by 3 publications

References 7 publications

Feasibility of Space Charge Measurements on HVDC Cable Joints: Study Group—IEEE DEIS Technical Committee “HVDC Cable and Systems:”

Feasibility of Space Charge Measurements on HVDC Cable Joints: Study Group—IEEE DEIS Technical Committee “HVDC Cable and Systems:”

Space Charge Measurement Techniques for Practical Insulation Systems

Analysis of Space Charge Signal Spatial Resolution Determined with PEA Method in Flat Samples including Attenuation Effects

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