View in EDS HTML Full Text PDF Full Text

Research on an Intelligent Sealed Neutral Point Protection Device for High-Altitude Transformers.

Saved in:
Bibliographic Details
Title: Research on an Intelligent Sealed Neutral Point Protection Device for High-Altitude Transformers.
Authors: Yan, Wen1 (AUTHOR), Li, Xiaohui1,2 (AUTHOR), Wang, Fujie1 (AUTHOR), Dong, Huifang1,2 (AUTHOR), Zhao, Zhongqi1 (AUTHOR), Gao, Jinpeng2 (AUTHOR), Han, Xutao2 (AUTHOR) xutaohan@xjtu.edu.cn
Source: Energies (19961073). Feb2026, Vol. 19 Issue 4, p906. 15p.
Subject Terms: *Overvoltage, *Microcontrollers, *Atmospheric nitrogen, *Capacitive sensors
Abstract: To address the malfunction and unreliable operation of traditional open discharge gaps in high-altitude environments (with sandstorms and low pressure), which are prone to interference from factors like electrode corrosion and contamination, this study proposes an intelligent sealed neutral point protection device for transformers. Its core is a sealed discharge gap filled with nitrogen gas, effectively isolating it from external conditions and significantly stabilizing the power frequency discharge voltage. Innovatively, an active breakdown technology is introduced. Overvoltage signals at the transformer neutral point are acquired in real time via a capacitive voltage divider. After processing by a microcontroller unit (MCU), if both the amplitude and duration meet the preset thresholds, the MCU triggers a pulse to actively induce a discharge at the gap's low-voltage end, enabling controlled breakdown. This allows the transient discharge voltage to be raised to 3–4 times the steady-state value, avoiding overlap with the surge arrester's residual voltage. Tests confirm that the gap breaks down stably only when both amplitude and duration conditions are met, remaining reliable otherwise. This design successfully resolves the critical issues of failure and maloperation under both steady-state and transient overvoltages in high-altitude settings, significantly improving protection selectivity and reliability, and offering a novel solution for transformer safety in such regions. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
Full text is not displayed to guests.
FullText Links:
  – Type: pdflink
Text:
  Availability: 1
Header DbId: enr
DbLabel: Energy & Power Source
An: 191973326
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Research on an Intelligent Sealed Neutral Point Protection Device for High-Altitude Transformers.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Yan%2C+Wen%22">Yan, Wen</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Xiaohui%22">Li, Xiaohui</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Fujie%22">Wang, Fujie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dong%2C+Huifang%22">Dong, Huifang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Zhongqi%22">Zhao, Zhongqi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gao%2C+Jinpeng%22">Gao, Jinpeng</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Han%2C+Xutao%22">Han, Xutao</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> xutaohan@xjtu.edu.cn</i>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Feb2026, Vol. 19 Issue 4, p906. 15p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Overvoltage%22">Overvoltage</searchLink><br />*<searchLink fieldCode="DE" term="%22Microcontrollers%22">Microcontrollers</searchLink><br />*<searchLink fieldCode="DE" term="%22Atmospheric+nitrogen%22">Atmospheric nitrogen</searchLink><br />*<searchLink fieldCode="DE" term="%22Capacitive+sensors%22">Capacitive sensors</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: To address the malfunction and unreliable operation of traditional open discharge gaps in high-altitude environments (with sandstorms and low pressure), which are prone to interference from factors like electrode corrosion and contamination, this study proposes an intelligent sealed neutral point protection device for transformers. Its core is a sealed discharge gap filled with nitrogen gas, effectively isolating it from external conditions and significantly stabilizing the power frequency discharge voltage. Innovatively, an active breakdown technology is introduced. Overvoltage signals at the transformer neutral point are acquired in real time via a capacitive voltage divider. After processing by a microcontroller unit (MCU), if both the amplitude and duration meet the preset thresholds, the MCU triggers a pulse to actively induce a discharge at the gap's low-voltage end, enabling controlled breakdown. This allows the transient discharge voltage to be raised to 3–4 times the steady-state value, avoiding overlap with the surge arrester's residual voltage. Tests confirm that the gap breaks down stably only when both amplitude and duration conditions are met, remaining reliable otherwise. This design successfully resolves the critical issues of failure and maloperation under both steady-state and transient overvoltages in high-altitude settings, significantly improving protection selectivity and reliability, and offering a novel solution for transformer safety in such regions. [ABSTRACT FROM AUTHOR]
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=191973326
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.3390/en19040906
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 15
        StartPage: 906
    Subjects:
      – SubjectFull: Overvoltage
        Type: general
      – SubjectFull: Microcontrollers
        Type: general
      – SubjectFull: Atmospheric nitrogen
        Type: general
      – SubjectFull: Capacitive sensors
        Type: general
    Titles:
      – TitleFull: Research on an Intelligent Sealed Neutral Point Protection Device for High-Altitude Transformers.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Yan, Wen
      – PersonEntity:
          Name:
            NameFull: Li, Xiaohui
      – PersonEntity:
          Name:
            NameFull: Wang, Fujie
      – PersonEntity:
          Name:
            NameFull: Dong, Huifang
      – PersonEntity:
          Name:
            NameFull: Zhao, Zhongqi
      – PersonEntity:
          Name:
            NameFull: Gao, Jinpeng
      – PersonEntity:
          Name:
            NameFull: Han, Xutao
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 15
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 19961073
          Numbering:
            – Type: volume
              Value: 19
            – Type: issue
              Value: 4
          Titles:
            – TitleFull: Energies (19961073)
              Type: main
ResultId 1