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Optimal Switch Placement in Distribution Systems for Constraints Satisfaction in Faulted Conditions.

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Title: Optimal Switch Placement in Distribution Systems for Constraints Satisfaction in Faulted Conditions.
Authors: Kawakami, Takamichi1 (AUTHOR), Sekizaki, Shinya1 (AUTHOR) sekizaki@hiroshima-u.ac.jp, Hayashida, Tomohiro1 (AUTHOR), Muto, Takaaki2 (AUTHOR), Iwata, Kunio2 (AUTHOR), Kunii, Yasuyuki3 (AUTHOR), Hikoyama, Kazuhisa3 (AUTHOR)
Source: Electrical Engineering in Japan. Mar2026, Vol. 219 Issue 1, p10-22. 13p.
Subject Terms: *Mixed integer linear programming, *Electric switchgear, *Power resources management, *Electric power systems, *Constraint satisfaction
Abstract: When a constraint violation occurs due to installing a new load in a distribution system, it can be resolved by reconfiguring the distribution system. This involves changing the states of manual and remote switches to satisfy the constraints by improving voltage and current profiles in normal and faulted conditions. However, simple reconfiguration may be insufficient to address severe constraints caused by the new large load installation because power supply restoration to outage sections from healthy sections by closing remote switches when a fault occurs may become infeasible in such cases. To effectively address these severe constraints, it becomes necessary to replace manual switches on tie lines with remote switches, enabling power supply restoration by controlling remote switches. For this purpose, this paper proposes a mixed‐integer linear programming (MILP) model that optimally and efficiently determines which remote switches should be replaced with manual ones while satisfying the severe constraints. The model aims to suppress the constraint violations, balance the number of sections, equalize the load capacities across sections, and minimize the number of switch replacements between remote and manual switches. The effectiveness of the proposed MILP model is demonstrated through case studies using a large‐scale distribution system model with numerous manual and remote switches. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
FullText Text:
  Availability: 0
Header DbId: enr
DbLabel: Energy & Power Source
An: 192266763
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Optimal Switch Placement in Distribution Systems for Constraints Satisfaction in Faulted Conditions.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Kawakami%2C+Takamichi%22">Kawakami, Takamichi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Sekizaki%2C+Shinya%22">Sekizaki, Shinya</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sekizaki@hiroshima-u.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Hayashida%2C+Tomohiro%22">Hayashida, Tomohiro</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Muto%2C+Takaaki%22">Muto, Takaaki</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Iwata%2C+Kunio%22">Iwata, Kunio</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kunii%2C+Yasuyuki%22">Kunii, Yasuyuki</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hikoyama%2C+Kazuhisa%22">Hikoyama, Kazuhisa</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Electrical+Engineering+in+Japan%22">Electrical Engineering in Japan</searchLink>. Mar2026, Vol. 219 Issue 1, p10-22. 13p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Mixed+integer+linear+programming%22">Mixed integer linear programming</searchLink><br />*<searchLink fieldCode="DE" term="%22Electric+switchgear%22">Electric switchgear</searchLink><br />*<searchLink fieldCode="DE" term="%22Power+resources+management%22">Power resources management</searchLink><br />*<searchLink fieldCode="DE" term="%22Electric+power+systems%22">Electric power systems</searchLink><br />*<searchLink fieldCode="DE" term="%22Constraint+satisfaction%22">Constraint satisfaction</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: When a constraint violation occurs due to installing a new load in a distribution system, it can be resolved by reconfiguring the distribution system. This involves changing the states of manual and remote switches to satisfy the constraints by improving voltage and current profiles in normal and faulted conditions. However, simple reconfiguration may be insufficient to address severe constraints caused by the new large load installation because power supply restoration to outage sections from healthy sections by closing remote switches when a fault occurs may become infeasible in such cases. To effectively address these severe constraints, it becomes necessary to replace manual switches on tie lines with remote switches, enabling power supply restoration by controlling remote switches. For this purpose, this paper proposes a mixed‐integer linear programming (MILP) model that optimally and efficiently determines which remote switches should be replaced with manual ones while satisfying the severe constraints. The model aims to suppress the constraint violations, balance the number of sections, equalize the load capacities across sections, and minimize the number of switch replacements between remote and manual switches. The effectiveness of the proposed MILP model is demonstrated through case studies using a large‐scale distribution system model with numerous manual and remote switches. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1002/eej.70003
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 10
    Subjects:
      – SubjectFull: Mixed integer linear programming
        Type: general
      – SubjectFull: Electric switchgear
        Type: general
      – SubjectFull: Power resources management
        Type: general
      – SubjectFull: Electric power systems
        Type: general
      – SubjectFull: Constraint satisfaction
        Type: general
    Titles:
      – TitleFull: Optimal Switch Placement in Distribution Systems for Constraints Satisfaction in Faulted Conditions.
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            NameFull: Kawakami, Takamichi
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            NameFull: Sekizaki, Shinya
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            NameFull: Hayashida, Tomohiro
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            NameFull: Muto, Takaaki
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            NameFull: Iwata, Kunio
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            – D: 01
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
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            – TitleFull: Electrical Engineering in Japan
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