Electrical Properties of Polyethylene/Polypropylene Compounds for High-Voltage Insulation

Dabbak, Sameh Ziad Ahmed; Illias, Hazlee Azil; Ang, Bee Chin; Latiff, Nurul Ain Abdul; Makmud, Mohamad Zul Hilmey

doi:10.3390/en11061448

Cited by 65 publications

(32 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Commonly available commercial electret filter media is made by corona-charging. Rather recently, electrospun webs have been regarded as potential electret filter material, while its scalability is yet challenging [8][9][10][11][12]. In most cases, both hetero-and homo-charges exist simultaneously, and the dominant type of charges determine the character of the electret [3].…”

Section: Introductionmentioning

confidence: 99%

Material Properties Influencing the Charge Decay of Electret Filters and their Impact on Filtration Performance

Lee

Kim

2020

Polymers

View full text Add to dashboard Cite

Electret filters as opposed to mechanical filters display the enhanced ability to capture airborne particles with the electrostatic attraction. However, the environmental aging during shelf-life or use may cancel its benefit by dissipating the charges. This work investigates the polymeric attributes influencing the charge decay and the electrostatic filtration of electret filters, employing polymers with different dielectric constants (εr) and wettability. As accelerated aging, high temperature (120 °C) or high humidity (25 °C, 90% RH) was applied to the electret filters for 48 h. For the humidity aging, wetting property of material was a critical factor affecting the charge decay and the filtration performance, as the absorbed water increases the electrical conductivity. For the thermal aging, the material with the highest εr deteriorated the electric potential and the filtration performance by the largest extent, due to the lower band gap energy for charge transfer. The results of this study implicate that εr and wettability are important material parameters influencing the electric conductivity and chain mobility, and they can be used as convenient predictors for charge retention capacity affecting the robust electrostatic filtration performance.

show abstract

Section: Introductionmentioning

confidence: 99%

Material Properties Influencing the Charge Decay of Electret Filters and their Impact on Filtration Performance

Lee

Kim

2020

Polymers

View full text Add to dashboard Cite

show abstract

“…It is for this measurement that the temperature dependence can be described by two exponential dependences with different activation energies. 6. It has been found that starting from the fourth measurement, the temperature dependence of conductance on the direct and alternating currents can be described by one exponential dependence with the activation energy 1.00±0.05 eV.…”

Section: Dynamics Of the Conductance Temperature Dependence For Lineamentioning

confidence: 94%

“…We consider that the difference between the T 0 value for σ DC (380 K) and σ AC (373 K) is most significant to measure in a solid phase. From our viewpoint, it may be (4), 377 (5), 392 (6), and 408 K (7). Table 2.…”

Section: Dynamics Of the Conductance Temperature Dependence For Lineamentioning

confidence: 99%

“…Therefore, an important scientific task is to study the electrical properties of these composite materials at those concentrations of impurities, at which they have the most suitable parameters for practical use. Electrical properties of polymers with different type conductive impurities are investigated for a relatively long time [1][2][3][4][5][6][7][8][9]. In the recent papers, nanoparticles [10][11][12][13][14][15][16][17], in particular nanotubes [18][19][20][21], were used to a greater extent as impurities.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of the conductance temperature dependence for composite based on linear polyethylene with impurity of soot and calcite

Poberezhets¹

2019

Semicond. phys., quantum electron. optoelectron.

View full text Add to dashboard Cite

Within the temperature 293 to 425 K and frequency 10 -3 to 10 6 Hz ranges by using the direct and alternating currents, the dynamics of electrical conductance σ of linear polyethylene with the impurity of 20 wt.% soot and 20 wt.% CaCO 3 (calcite) has been investigated. It has been shown that for the solid state of polyethylene (below 380 K), the dependence of electrical conductance on the temperature T on both the direct (σ DC ) and alternating (σ AC ) currents can be described by the power dependence on ( )is the temperature of the phase transition for polyethylene). It has been shown that when being repeatedly measured, the σ DC and σ AC values increase, and the power indexes of temperature dependence decrease. The measured values are stable after the fourth measurement. The greatest changes in the conductance, depending on the first and second measurements (almost three orders of magnitude), were observed at a temperature close to T 0 . It has been assumed that the dynamics of electrical conductance, depending on the number of measurements, is caused by the influence of the electric field on the ordering of impurity in polymer. It has been shown that for T > 380 K, the typical for liquids Arrhenius dependence of σ DC and σ AC on temperature is observed. It has been found that at the first measurement, the temperature dependence of σ DC and σ AC can be described by two activation energies, while for a stable state (starting from the fourth measurement)by one activation energy (within the measurement error of the same for σ DC and σ AC and equal to 1 eV).

show abstract

“…One of the most important elements in a cable is the insulation layer [1][2][3]. For this reason, cable manufacturers are continuously testing dielectric materials that can provide the best performances [4,5]. Typically, from the electrical point of view, capacitance, resistivity, dielectric strength, and permittivity are the main parameters to be taken into account [6].…”

Section: Introductionmentioning

confidence: 99%

The Industrial Applicability of PEA Space Charge Measurements, for Performance Optimization of HVDC Power Cables

et al. 2019

View full text Add to dashboard Cite

Cable manufacturing industries are constantly trying to improve the electrical performance of power cables. During the years, it was found that one of the most relevant degradation factors influencing the cable lifetime is the presence of space charge in the insulation layer. To detect the accumulated charge, the pulsed electro-acoustic (PEA) method is the most used technique. Despite the wide use of the PEA cell, several issues are still present. In particular, the PEA output signal is strongly disturbed by the acoustic waves reflections within the PEA cell. This causes the distortion of the output signal and therefore the misinterpretation of the charge profiles. This, in turn, may result in an incorrect cable characterization from the space charge phenomenon point of view. In 2017, due to the proved degradation effect of the space charge accumulation phenomenon, the IEEE Std 1732 was developed. This standard describes the steps to be followed for the space charge measurement in cables specimens during pre-qualification or type tests. Therefore, cable manufacturing industries started to take a particular interest in these measures. In the light of this, the aim of the present work is to highlight that the enacted standard is not easily applicable since various problems are still present in the PEA method for cables. In particular, in this work, the effect of multiple reflected signals due to the different interfaces involved, but also the effect of the signal attenuation due to cable dielectric thickness, as well as the effect of the PEA cell ground electrode thickness in the output charge profile, are reported. These issues have been demonstrated by means of an experimental test carried out on a full-size cable in the Prysmian Group High Voltage laboratory. To better understand the PEA cell output signal formation, a PEA cell model was developed in a previous work and it has been experimentally validated here. In particular, simulations have been useful to highlight the effect of the reflection phenomena due to the PEA cell ground electrode thickness on the basis of the specimen under test features. Moreover, by analyzing the simulation results, it was possible to separate the main signal from the reflected waves and, in turn, to calculate the suitable ground electrode thickness for the cable specimen under test.

show abstract

Electrical Properties of Polyethylene/Polypropylene Compounds for High-Voltage Insulation

Cited by 65 publications

References 38 publications

Material Properties Influencing the Charge Decay of Electret Filters and their Impact on Filtration Performance

Material Properties Influencing the Charge Decay of Electret Filters and their Impact on Filtration Performance

Dynamics of the conductance temperature dependence for composite based on linear polyethylene with impurity of soot and calcite

The Industrial Applicability of PEA Space Charge Measurements, for Performance Optimization of HVDC Power Cables

Contact Info

Product

Resources

About