７２ｋＶ低圧力ドライエア絶縁Ｃ－ＧＩＳにおけるドライエア中および真空中での絶縁技術

Yoshida, Tsuneo; Koga, Hiromi; Harada, Takakazu; Soma, M.; Arioka, Masahiro; Sato, S.; Yoshida, Shigeo; Inoue, Naoaki; Maruyama, Akihiko; Takeuchi, Toshie

doi:10.1541/ieejpes.128.1439

Cited by 13 publications

(5 citation statements)

References 4 publications

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“…Relying on the good insulation performance of air, the air insulated switchgears (AIS) are widely applied in lowand medium-voltage electrical substations to avoid the partial discharge [1]. When the insulation defects such as overload and overheat occur, the AIS can quickly switch off the current thus ensuring the safety operation for the whole power system [2,3]. However, the long term partial discharge can largely impair the insulation performance of the AIS, even causing it breakdown and threating the safety operation of the whole power system [4].…”

Section: Introductionmentioning

confidence: 99%

First-principles exploration of N- and Pd-doped graphene as CO and NO₂ gas sensor for operation status evaluation in AIS

Wu,

Zhong,

et al. 2024

Phys. Scr.

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To evaluate the operation status of air insulated switchgears (AIS), this work purposes N- and Pd- embedded graphene (N- and Pd-graphene) as potential gas sensors upon two typical faults gases (CO and NO2) from the first-principles simulations. It is found that the N and Pd atoms can be stably trapped on the C-vacancy of the C-defected graphene with the formation energy of -12.17 and -5.12 eV, respectively. N-graphene behaves physisorption towards CO and NO2 molecules while Pd-graphene behaves chemisorption instead. The resistance-type and work function (WF)-based sensing mechanisms of N- and Pd-graphene upon such two gas species are illustrated and uncovered by analyzing their deformations of electronic property and WF in the gas adsorption systems, which reveals the potential of Pd-graphene as a resistive CO and NO2 sensor, N-graphene as a resistive NO2 sensor, as well as the N- and Pd-graphene as WF-based gas sensor for NO2 detection. This work highlights the comparison of adsorption and sensing performances between N- and Pd-graphene upon two typical gas sensors in AIS, which would be meaningful to explore novel graphene-based sensing materials facilitating their investigations and applications in the power system.

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Section: Introductionmentioning

confidence: 99%

First-principles exploration of N- and Pd-doped graphene as CO and NO₂ gas sensor for operation status evaluation in AIS

Wu,

Zhong,

et al. 2024

Phys. Scr.

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“…Air-insulated switchgear is an important type of high-voltage electrical equipment, mainly applied to protect and control the equipment in the power system, such as transformers, generators, capacitors, and cables, to ensure the safety and normal operation of the whole power system. 1 In air-insulated switchgears, the air is used as the insulation medium to prevent partial discharge in the equipment, therefore, they are tremendously applied in medium and low-voltage power equipment owing to their unique merits of low cost and good performance. 2 However, after a long time running, some inevitable insulation defects, including partial discharge and electric corona, would occur in such kind of equipment, decomposing the air into two toxic gas species, including NO 2 and O 3 , 2,3 wherein the partial overheat can facilitate such process dramatically.…”

Section: Introductionmentioning

confidence: 99%

Adsorption and sensing mechanisms of Ni-doped PtTe₂ monolayer upon NO₂ and O₃ in air-insulated switchgears

2023

RSC Adv.

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“…In the power system, the ring main unit is the widely applied equipment for electric transmission and distribution, with the advantages of simple operation, small size, and low cost. , From another aspect, safe operation plays a critical role in ensuring the safety and stability of the whole power system. When insulation defects such as partial discharge and partial overheat occur, the air in the ring main unit would be decomposed into several impurity gases wherein O 3 and NO 2 are the main species. , As reported, the presence of these decomposed species would impair the insulation behavior of the filled air, thus weakening the operation status of the ring main unit .…”

Section: Introductionmentioning

confidence: 99%

Rh-Doped ZnO Monolayer as a Potential Gas Sensor for Air Decomposed Species in a Ring Main Unit: A First-Principles Study

Wang

Yang

et al. 2021

ACS Omega

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Using the first-principles theory, this paper studies the Rh-doping behavior on the ZnO monolayer and investigates the adsorption and sensing behaviors of a Rh-doped ZnO (Rh–ZnO) monolayer to NO2 and O3 to explore its potential as a gas sensor to evaluate the operation status of the ring main unit in the power system. The results indicate that the Rh dopant can be stably anchored on the TO site of the ZnO monolayer with an E b of −2.11 eV. The Rh–ZnO monolayer shows chemisorption of NO2 and O3, with E ad values of −2.11 and −1.35 eV, respectively. Then, the electronic behavior of the Rh–ZnO monolayer before and after gas adsorption is analyzed in detail to uncover the sensing mechanism for gas detection. Our findings indicate that the Rh–ZnO monolayer is a promising resistance-type gas sensor with a higher response to O3 and can be explored as a field-effect gas sensor with a higher response to NO2. Our theoretical calculations provide the basic sensing mechanism of the Rh–ZnO monolayer for gas detection and would be meaningful to explore novel sensing materials for gas detection in the field of electrical engineering.

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７２ｋＶ低圧力ドライエア絶縁Ｃ－ＧＩＳにおけるドライエア中および真空中での絶縁技術

Cited by 13 publications

References 4 publications

First-principles exploration of N- and Pd-doped graphene as CO and NO₂ gas sensor for operation status evaluation in AIS

First-principles exploration of N- and Pd-doped graphene as CO and NO₂ gas sensor for operation status evaluation in AIS

Adsorption and sensing mechanisms of Ni-doped PtTe₂ monolayer upon NO₂ and O₃ in air-insulated switchgears

Rh-Doped ZnO Monolayer as a Potential Gas Sensor for Air Decomposed Species in a Ring Main Unit: A First-Principles Study

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７２ｋＶ低圧力ドライエア絶縁Ｃ－ＧＩＳにおけるドライエア中および真空中での絶縁技術

Cited by 13 publications

References 4 publications

First-principles exploration of N- and Pd-doped graphene as CO and NO2 gas sensor for operation status evaluation in AIS

First-principles exploration of N- and Pd-doped graphene as CO and NO2 gas sensor for operation status evaluation in AIS

Adsorption and sensing mechanisms of Ni-doped PtTe2 monolayer upon NO2 and O3 in air-insulated switchgears

Rh-Doped ZnO Monolayer as a Potential Gas Sensor for Air Decomposed Species in a Ring Main Unit: A First-Principles Study

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First-principles exploration of N- and Pd-doped graphene as CO and NO₂ gas sensor for operation status evaluation in AIS

First-principles exploration of N- and Pd-doped graphene as CO and NO₂ gas sensor for operation status evaluation in AIS

Adsorption and sensing mechanisms of Ni-doped PtTe₂ monolayer upon NO₂ and O₃ in air-insulated switchgears