• Title/Summary/Keyword: Sectionalizing switches

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The Optimized Standards and Criteria for Installing Switches on Distribution Feeder (국내 배편계통의 최적 개폐기 설치 기준)

  • Jo, Nam-Hun;Ha, Bok-Nam;Lee, Heung-Ho
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.51 no.5
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    • pp.238-246
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    • 2002
  • Utilities are trying to install the equipment of high quality to avoid deterioration of supply reliability. In addition, many sectionalizing switches which can decrease the total outage value for a fault are installed for the same reason. Therefore, utilities are interested in stun dards and criteria for installing switches to optimize the total cost on distribution systems. The affect of sectionalizing switches installed on distribution feeder is gradually decreased because the failure rate on distribution feeder is decreased. Also the automation for distribution systems is widely applied for the efficient operation. Therefore, the renewal for installation standards of sectionalizing switches Is required to reflect the current operation situation. The variable data is used to consider the KEPCO's real situation of distribution feeder as follows; the feeder capacity, connecting rate, feeder length, failure rate of distribution feeder, the failure rate of switches, perception time of feeder fault, the restoration time for a faulted section, the transfer time to other feeders, and the switching time. In this study, We propose equations which can determine the number of sectionalizing switches for minimizing the outage and switch installation cost.

The optimized standards and criteria for installing switches on distribution feeder (국내 배전계통의 최적 개폐기 설치 기준(I))

  • Cho, Nam-Hun;O, Jae-Hyeong;Lee, Heung-Ho;Ha, Bok-Nam
    • Proceedings of the KIEE Conference
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    • 2002.07a
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    • pp.70-73
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    • 2002
  • Utilities are trying to install the equipment of high quality to avoid deterioration of supply reliability. In addition, many sectionalizing switches which can decrease the total outage value for a fault are installed for the same reason. Therefore, utilities are interested in standards and criteria for installing switches to optimize the total cost on distribution systems. The affect of sectionalizing switches installed on distribution feeder is gradually decreased because the failure rate on distribution feeder is decreased. Also the automation for distribution systems is widely applied for the efficient operation. Therefore, the renewal for installation standards of sectionalizing switches is required to reflect the current operation situation. The variable data is used to consider the KEPCO's real situation of distribution feeder as follows; the feeder capacity, connecting rate, feeder length, failure rate of distribution feeder, the failure rate of switches, perception time of feeder fault, the restoration time for a faulted section, the transfer time to other feeders, and the switching time. In this study, We propose equations which can determine the number of sectionalizing switches for minimizing the outage and switch installation cost.

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A Study on Distribution Network Reconfiguration for Loss Reduction (손실감소를 위한 배전계통 재구성에 관한 연구)

  • Kim, S.H.;Choi, B.Y.;Cho, S.H.;Son, I.B.;Moon, Y.H.
    • Proceedings of the KIEE Conference
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    • 1996.07b
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    • pp.686-688
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    • 1996
  • Network reconfiguration is performed by opening/closing two types of switches, tie and sectionalizing switches. A whole feeder, or part of a feeder, may be served from another feeder by closing a tie switch linking the two while an appropriate sectionalizing switch must be opened to maintain radial structures. In loss reduction, the problem is to identify tie and sectionalizing switches that should be closed and opened, respectively, to achieve a maximum loss reduction. In this paper, it is introduced to propose the reconfiguration plan for loss reduction by using the Civanlar's loss reduction formular.

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An Application of Enhanced Genetic Algorithm to solve the Distribution System Restoration Problem (배전계통 사고복구 문제에 갠선된 유전 알고리즘 적용)

  • Lee, Jung-Kwan;Mun, Kyeong-Jun;Hwang, Gi-Hyun;Seo, Jeong-Il;Lee, H.S.;Park, J.H.
    • Proceedings of the KIEE Conference
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    • 1999.07c
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    • pp.1123-1125
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    • 1999
  • This paper proposes an optimization technique using Genetic Algorithm(GA) for service restoration in the distribution system. Restoration planning problem can be treated as a combinatorial optimization problem. So GA is appropriate to solve the service restoration problem in the distribution network. But searching capabilities of the GA can be enhanced by developing relevant repairing operation and modifying GA operations. In this paper, we aimed at finding appropriate open sectionalizing switch position for the restoration of distribution networks after disturbances using enhanced GA with repairing operation and modified mutation. Simulation results show that proposed method found the open sectionalizing switches with less out of service area and minimize transmission line losses and voltage drop.

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A Re-Configuration Genetic Algorithm for Distribution Systems (배전계통에서 유전적 알고리즘을 이용한 접속변경순서결정방법)

  • Choi, Dai-Seub
    • Proceedings of the KIEE Conference
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    • 2005.05b
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    • pp.62-63
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    • 2005
  • Recently, sectionalizing switches have been coming to be operated by remote control through the distribution SCADA system. However, the problem of determining the optimal switching sequence is a combinatorial optimization problem, and is quite difficult to solve, Hence, it is imperative to develop practically applicable solution algorithms create a new arbitral distribution system configuration from an initial configuration, and some of these algorithms do not show a load transfer sequence to reach the objective system.

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A Re-Configuration Genetic Algorithm for Distribution Systems (배전계통에서 유전적 알고리즘을 이용한 접속변경순서 결정방법)

  • Choi, Dai-Seub
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.11a
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    • pp.381-383
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    • 2004
  • Recently, sectionalizing switches have been coming to be operated by remote control through the distribution SCADA system. However, the problem of determining the optimal switching sequence is a combinatorial optimization problem, and is quite difficult to solve. Hence, it is imperative to develop practically applicable solution algorithms create a new arbitral distribution system configuration from an initial configuration, and some of these algorithms do not show a load transfer sequence to reach the objective system.

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A Re-Configuration Genetic Algorithm for Distribution Systems (배전계통에서 유전적 알고리즘을 이용한 접속변경순서결정방법)

  • Choi, Dai-Seub
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2005.05a
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    • pp.418-420
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    • 2005
  • Recently, sectionalizing switches have been coming to be operated by remote control through the distribution SCADA system. However, the problem of determining the optimal switching sequence is a combinatorial optimization problem, and is quite difficult In solve. Hence, it is imperative to develop practically applicable solution algorithms create a new arbitral distribution system configuration from an initial configuration and some of these algorithms do not show a load transfer sequence to reach the objective system.

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SERVICE RESTORATION Of POWER DISTRIBUTION SYSTEMS BASED ON GROUPING (정전 구역 분할에 의한 배전 계통 복구)

  • Lee, Seung-Jae;Kim, Kuk-Hun;Lee, Joo-Kwang
    • Proceedings of the KIEE Conference
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    • 1992.07a
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    • pp.169-171
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    • 1992
  • In an automated power distribution systems, the fault situation is controlled from the control center through remotely-controlled sectionalizing switches. In this paper, the service restoration strategy which can yield the minimal switching actions and constraint checking is proposed and an expert system which generates the appropriate switching actions is described.

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An Application of advanced Dijkstra algorithm and Fuzzy rule to search a restoration topology in Distribution Systems (배전계통 사고복구 구성탐색을 위한 개선된 다익스트라 알고리즘과 퍼지규칙의 적용)

  • Kim, Hoon;Jeon, Young-Jae;Kim, Jae-Chul;Choi, Do-Hyuk;Chung, Yong-Chul;Choo, Dong-Wook
    • Proceedings of the KIEE Conference
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    • 2000.07a
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    • pp.537-540
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    • 2000
  • The Distribution System consist of many tie-line switches and sectionalizing switches, operated a radial type. When an outage occurs in Distribution System, outage areas are isolated by system switches, has to restored as soon as possible. At this time, system operator have to get a information about network topology for service restoration of outage areas. Therefore, the searching result of restorative topology has to fast computation time and reliable result topology for to restore a electric service to outage areas, equal to optimal switching operation problem. So, the problem can be defined as combinatorial optimization problem. The service restoration problem is so important problem which have outage area minimization, outage loss minimization. Many researcher is applying to the service restoration problem with various techniques. In this paper, advanced Dijkstra algorithm is applied to searching a restoration topology, is so efficient to searching a shortest path in graph type network. Additionally, fuzzy rules and operator are applied to overcome a fuzziness of correlation with input data. The present technique has superior results which are fast computation time and searching results than previous researches, demonstrated by example distribution model system which has 3 feeders, 26 buses. For a application capability to real distribution system, additionally demonstrated by real distribution system of KEPCO(Korea Electric Power Corporation) which has 8 feeders and 140 buses.

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