Moisture effect on surface fluorinated epoxy resin for high-voltage DC applications

Mohamad, A.; Chen, G.; Zhang, Yu Zhong; An, Z.

doi:10.1109/tdei.2015.005437

Cited by 14 publications

(5 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In fact, it is believed that, both nitrogen-dried and vacuumoven-dried sample, if exposed long enough to ambient moisture, may become saturated and may show the surface current measurement as in day 0. From the curve-fitting parameters in Table 6-6, similar pattern is observed as in Table 6 surely reduce the moisture-assisted charge injection [176] and, hence explained the reduced value for parameters after nitrogen-drying for both F00 and F60 samples.…”

Section: Nitrogen-dried Testsupporting

confidence: 71%

“…The increase in surface breakdown strength, which principally comes from the increase in surface conductivity, is largely attributed towards the ability of fluorinated surface to absorb surface moisture due to the increase in surface roughness [176] as explained thoroughly in Chapter 6. The increase in surface conductivity is also attributed, to a lesser extent, to the increase in physical defects and/or structural changes from the fluorination treatment.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Surface fluorinated epoxy resin for high voltage DC application

Mohamad

Chen

Zhang

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

Self Cite

View full text Add to dashboard Cite

Charge build up under high voltage DC is a significant concern in the transmission system as its presence may distort the local electric field. By chemically treat polymeric insulation via directfluorination, and plasma enhanced fluorination process, the charge transport characteristics of the material can be modified. In doing so, excellent surface properties similar to those of fluoropolymers can be attained without compromising the bulk properties of the original polymeric insulation. The change in chemical components at the surface of polymeric insulation should lead to a corresponding change in dielectric properties at the surface and consequently may suppress the occurrences of charge build up. In this research, epoxy resin samples with various surface fluorinating conditions were formulated and treated. The samples then were characterised by SEM and EDX analysis, Raman spectroscopy, and DC surface conductivity measurements. To further explain the effects of fluorination treatment, modelling of the electric field and current density distribution had been carried out. Surface potential decay tests from corona discharge, as well as PEA measurements, show that there is a significant change in decay characteristics with the introduction of surface fluorinated layer. The decay mechanisms responsible for the observed

show abstract

Section: Nitrogen-dried Testsupporting

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Surface fluorinated epoxy resin for high voltage DC application

Mohamad

Chen

Zhang

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In their subsequent studies, they paid more attention to the charge suppressing mechanism [26]. They believed that the increase in the surface conductivity may not be due to the fluorine layer itself, but because of the moisture absorbed by the surface layer [27]. It is interesting to note that according to a recent report, the conductivity of the fluorinated layer has a negative correlation with increase of the temperature [15], while the result provided by Chen implies that increase of the conductivity by fluorination process is due to absorbed surface moisture, which can be the rationale behind this phenomenon.…”

Section: Surface Fluorinationmentioning

confidence: 99%

Gas–solid interface charge tailoring techniques: what we grasped and where to go

Zhang¹,

Wang²,

Teyssèdre³

et al. 2020

Nanotechnology

View full text Add to dashboard Cite

Charging of insulators modifies local electric field distribution and increases potential threat to the safety of the gas insulated equipment. In this paper, surface charge tailoring techniques are classified and reviewed by introducing a Dam-flood model. Technical solutions of different charge tailoring methods are compared and discussed. The outlook of potential solutions to suppress charge accumulation is recommended and discussed based on industrial consideration.This paper serves as a guide handbook for engineers and researchers into the study of charge tailoring methods.Meanwhile, we hope that the content of this paper could shed some lights upon charge-free insulators to promote the industrial application of HVDC GIL/GIS.

show abstract

“…Loganathan studied the tracking and erosion resistance property of virgin and aged silicon rubber filled nano-sized SiO 2 under AC voltage. He found that the tracking and erosion resistance was improved when nano-filler concentration was increased in both the virgin and aged SIR composites [11].…”

Section: Introductionmentioning

confidence: 99%

Effect of long‐term fluorination on surface electrical performance of ethylene propylene rubber

et al. 2019

View full text Add to dashboard Cite

To investigate the effect of fluorination on surface electrical performance of ethylene propylene rubber (EPR), four pieces of EPR specimens are prepared and fluorinated for different duration ranging from 120 min to 480 min. The surface morphology and element compositions of experimental specimens are tested. The surface potential decay and complex permittivity are measured. The tracking discharge property and the erosion properties after tracking test are investigated. The surface charge transport and electrical property tailoring mechanism are discussed. The results show that when the fluorination duration is from 120 min to 360 min, the surface morphology gradually becomes flat and compact with time, and the surface resistance to electrical tracking is improved. While an excessive fluorination with the duration of 480 min leads to a significant increase in surface conductivity and a weakening in the resistance to electrical tracking, which is mainly due to a change in surface morphology. The recommended fluorination duration for an optimised surface property is between 240 and 360 min for EPR specimen.

show abstract

Moisture effect on surface fluorinated epoxy resin for high-voltage DC applications

Cited by 14 publications

References 16 publications

Surface fluorinated epoxy resin for high voltage DC application

Surface fluorinated epoxy resin for high voltage DC application

Gas–solid interface charge tailoring techniques: what we grasped and where to go

Effect of long‐term fluorination on surface electrical performance of ethylene propylene rubber

Contact Info

Product

Resources

About