Effect of the Aging Status on Ionization of Oil Immersed Paper

Ren, Shuangzan; Wu, Jingfeng; Wu, Hao; Hao, Dongxin; Wu, Yang; Gao, Lu; Lv, Zepeng; Wu, Kai

doi:10.1109/ceidp50766.2021.9705409

Cited by 1 publication

(1 citation statement)

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“…The internal insulation of the transformer is mainly divided into two parts: paper insulation (which includes insulating paper and insulating cardboard) and oil insulation [9,10]. In the long-term operation, under the influence of electricity, heat, moisture and oxygen conditions, the oil/paper insulation of the transformer deteriorates [11]. Usually, in practice, the insulation performance of the insulating oil can be maintained by means of an oil change and oil filter, but the insulating paper is difficult to replace, which directly threatens the operating life of the Energies 2024, 17, 2499 2 of 16 transformer [12].…”

Section: Introductionmentioning

confidence: 99%

Aging Characterization of Modified Insulating Paper Based on the Transmission Characteristics of Microstrip Resonant Sensors

Xiao,

Yang,

Zhang

2024

Energies

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In this paper, the aging characterization of a kind of insulating paper modified by magnetron sputtering MgO particles based on a microstrip resonant sensor was presented. Firstly, the modified insulating paper with 0, 15 and 30 min MgO particle sputtering times was prepared by a magnetron sputtering device. After that, the properties of the modified insulating paper with different sputtering times were analyzed through microscopic characterization, infrared spectrum, polymerization degree, dielectric constant, AC breakdown strength and thermal aging experiments. The results show that the dielectric constant of the modified insulating paper decreased obviously, the AC breakdown strength increased and the thermal aging resistance was better after 15 min of sputtering. The overall performance of the modified insulating paper after 30 min of sputtering is reduced due to excessive sputtering. In addition, microstrip resonant sensors are introduced to characterize the thermal aging degree of the modified insulating paper, and two microstrip resonant sensors are prepared: a complementary split ring resonator (CSRR) and an interdigital-capacitor-shaped defected ground structure resonator (IDCS-DGS). The resonance frequency deviation of the modified insulating paper samples after aging was measured by microstrip resonance sensors to show the influence of aging temperature on aging degree. The experimental results show that the test results of the microstrip resonance sensors are in good agreement with the traditional characterization methods and can characterize the various aging stages of the modified insulating paper to a certain extent, which proves the feasibility of the characterization method.

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