Dielectric spectroscopy as a condition monitoring technique for cable insulation based on crosslinked polyethylene

Linde, Erik; Verardi, L.; Fabiani, Davide; Gedde, Ulf W.

doi:10.1016/j.polymertesting.2015.04.004

Cited by 52 publications

(66 citation statements)

References 29 publications

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“…The XLPE with 0.5 wt% voltage addition shows less dielectric constant as compared to the pure XLPE. The value of the dielectric constant of pure XLPE at 50 Hz is 2.3, which is in a good agreement with the standard range of 2.3–2.4 . Moreover, 3 wt% voltage stabilizer addition further decreases the dielectric constant significantly.…”

Section: Results and Analysissupporting

confidence: 81%

Enhancement of Service Life and Electrical Insulation Properties of Polymeric Cables With the Optimum Content of Aromatic Voltage Stabilizer

Chen

Paramane

Liu

et al. 2020

Polymer Engineering & Sci

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This article presents the possibility of extending the service life of XLPE insulation based on high voltage cables by blending the optimum concentration of the aromatic voltage stabilizer. The insulation performance of XLPE is analyzed by adding the 0.5, 1, and 3 wt% of 3‐aminobenzoic acid voltage stabilizer. The investigated insulation properties include the DC step‐by‐step breakdown to estimate the life exponent, space charge, DC conductivity, surface potential decay, dielectric loss, and dielectric constant measurements. The results illustrate that the 1 wt% voltage stabilizer addition increases the life exponent from 10 up to 15, which is highly suitable for the high voltage cables. Moreover, it exhibits the negligible space charge accumulation and the least electrical field distortion inside the insulation bulk. It also exhibits the lower DC conductivity by one order of magnitude comparing to the pure XLPE. The highest bandgap value of 1 wt% addition further supports its better insulating properties. Furthermore, the dielectric measurements show that the XLPE with 1 wt% voltage stabilizer exhibits the least dielectric constant and dielectric loss. The differential scanning calorimetry and thermogravimetric analysis results show that the thermal properties are significantly improved after the voltage stabilizer addition. POLYM. ENG. SCI., 60:717–731, 2020. © 2020 Society of Plastics Engineers

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Section: Results and Analysissupporting

confidence: 81%

Enhancement of Service Life and Electrical Insulation Properties of Polymeric Cables With the Optimum Content of Aromatic Voltage Stabilizer

Chen

Paramane

Liu

et al. 2020

Polymer Engineering & Sci

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“…It is worth noting that, in most cases, both factors increase with aging time. For this reason, complex permittivity ε is usually used as a marker for aging grade of polymers [6].…”

Section: Measurementsmentioning

confidence: 99%

“…Results obtained by electrical CM techniques were compared and correlated to results gained by traditional CM methods for validation. As an example, modification of electrical permittivity was found to be associated with oxidation induced by aging [5][6].…”

Section: Introductionmentioning

confidence: 99%

About electrical and mechanical behaviour of low-voltage I&C cables used in nuclear power plants

Suraci¹,

Fabiani²,

Bulzaga³

2018

MMC_C

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This paper focuses on the electrical and mechanical properties of irradiated and thermallystressed NPP cables used for instrumentation and control (I&C). These cables show some noteworthy changes after few years of uncontrolled environment conditions due to a phenomenon called post-irradiation effect. Strong post-irradiation effects, e.g. reduction of mechanical properties, raise of crosslinking and oxidation grade, were found on XLPE cable insulation years after irradiation. These degradation mechanisms can be correlated with electrical measurements in which imaginary permittivity values raise, in particular at low-frequencies where interfacial phenomena take place. This behavior can be linked to the increase of interfacial area between amorphous and crystalline region of polymer, supporting the evidence that postirradiation effects can lead to polymer crosslinking during a storage period even at room temperature.

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“…This paper is a continuation of a series of papers [1,2] investigating the use of dielectric spectroscopy as a condition monitoring technique for cable insulations installed in nuclear power plants. Nuclear plants generate a significant part of the electrical power consumed in the world [3], but many of these power plants are nearing, or have even exceeded, their design lifetime, and significant effort is being put into ensuring that they can continue operation for an extended period of time.…”

Section: Introductionmentioning

confidence: 99%

“…Dielectric response has also been studied for this purpose, and it has been promising for various systems, including cross-linked polyethylene [2,30], chlorosulphonated polyethylene [31], ethylene-propylene rubber (EPR) and ethylene-propylene diene monomer (EPDM) rubber [1,32e34]. This method has also been effective as a tool for the detection of water trees in medium-and high-voltage cable insulations [35e37].…”

Section: Introductionmentioning

confidence: 99%

Non-destructive condition monitoring of aged ethylene-propylene copolymer cable insulation samples using dielectric spectroscopy and NMR spectroscopy

et al. 2015

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Dielectric spectroscopy as a condition monitoring technique for cable insulation based on crosslinked polyethylene

Cited by 52 publications

References 29 publications

Enhancement of Service Life and Electrical Insulation Properties of Polymeric Cables With the Optimum Content of Aromatic Voltage Stabilizer

Enhancement of Service Life and Electrical Insulation Properties of Polymeric Cables With the Optimum Content of Aromatic Voltage Stabilizer

About electrical and mechanical behaviour of low-voltage I&C cables used in nuclear power plants

Non-destructive condition monitoring of aged ethylene-propylene copolymer cable insulation samples using dielectric spectroscopy and NMR spectroscopy

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