• Title/Summary/Keyword: restoration paper

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A Study on the Restoration Algorithm For Multi-Outage Areas in distribution system (광역고장을 고려한 정전 복구 알고리즘 연구)

  • Jung Jin Soo;Moon Hyun Kyung;Lim Seong Il;Lee Seung Jae
    • Proceedings of the KIEE Conference
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    • summer
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    • pp.381-383
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    • 2004
  • This paper presents for service restoration Abstract -in electric power distribution systems. The aim of the service restoration is an emergency control in distribution system to restore out-of service areas as soon as possible when a fault occurs in distribution system. For this reason, this paper presents a new service restoration strategy for multi-outage areas. Proposed algorithm consists of two methods. One is individual restoration scheme, the other one is integrated restoration scheme. The former determines restoration order of outage areas based on restoration index. If the former method can not generate a feasible restoration plan, the latter would try to find new configuration without overloaded section through tie exchange method.

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The Development of Multi-Fault Restoration Algorithm for Distribution Network (배전계통 광역 정전복구 알고리즘 개발)

  • Jung, Jin-Soo;Lee, Seung-Jae;Jung, Jong-Wook;Lim, Young-Bae;Bae, Seok-Myung;Yi, Geon-Ho
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.20 no.3
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    • pp.69-77
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    • 2006
  • This paper presents the service restoration in electric power distribution systems. The aim of the service restoration is to control an emergency taken place in distribution systems and to restore out-of service areas as soon as possible when a fault occurs in distribution systems. For this reason, new service restoration strategies in multi-outage area are suggested in this paper. The suggested algorithm consist of two schemes. One is an individual restoration scheme, the other is an integrated restoration scheme. The former determines a restoration order of outage areas based on a restoration index. Unless the former scheme can generate a feasible restoration plan, the latter one will try to find out a new configuration without an overloaded section through tie exchange method.

Analysis of Folding Restoration of Korea Bank Note (유가증권의 접힘복원 특성분석)

  • Park, Yong-Sung;Seo, Yung-Bum;Jeon, Yang
    • Proceedings of the Korea Technical Association of the Pulp and Paper Industry Conference
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    • 2007.04a
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    • pp.157-165
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    • 2007
  • Restoration behavior of folded Korea bank note was studied. The variables were folding radii (0.5, 1, 3, 5. 7, 9 mm) and folding time. Initially, bank note was completely folded to make $180^{\circ}$ against predetermined radius panel, and restored angles were measured according to allowed restoration time. We found as folding radius was smaller and as folding time was longer, restoration speed of folding angle became slower and the amount of final restoration was smaller, respectively. Initial restoration angles were related to the elastic moduli of the bank notes, and final restoration angles were inversely related to the TEA of the bank notes, respectively.

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Performance Evaluation of a Distributed Restoration Algorithm for All-optical Networks (전광 전달망 장애 복구 알고리듬의 성능 분석)

  • Joo, Un-Gi;Lee, Jong-Hyun
    • IE interfaces
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    • v.14 no.2
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    • pp.148-157
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    • 2001
  • This paper considers a network restoration algorithm for all-optical WDM networks. As the increasing traffic and transmission speed, any failure on the networks will lead to loss of huge data and disruption of the services. Therefore, a network restoration algorithm is necessary for the high-speed all-optical networks. This paper suggests a distributed restoration algorithm for line or channel level failures under the dynamic rerouting. For the algorithm, some measures for performance evaluation are explicitly derived and simulation studies are exploited to evaluate its usability by SLAM(Simulation Language for Alternative Modeling) II.

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Restoration Review of the First Baptist Church in Urbana, Illinois (1838-)

  • kim, jin-ho
    • Journal of Urban Science
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    • v.8 no.1
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    • pp.59-62
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    • 2019
  • The purpose of this study was to analyze the history and significance of the building and its site of First Baptist Church in Urbana, Illinois. Before the full-scale restoration work is initiated, historical confirmation of the building is necessary. Therefore, this paper examined the historical significance of the church through the in-depth literature review and examined the interior and exterior conditions thoroughly. Ultimately, this paper can contribute to make up the restoration work list and to determine the priority of them.

A MPLS Group Restoration using an Aggregation Tree (집성 트리를 이용한 MPLS 그룹 복구)

  • Lee, Kil-Hung
    • Journal of Korea Multimedia Society
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    • v.10 no.3
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    • pp.358-364
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    • 2007
  • This paper suggests MPLS restoration method that use an aggregation tree. For the restoration of the MPLS network, this paper presents a scheme that reconstruct multiple path through aggregation tree that grow from many node to a target node. Contrary to a multicast tree where a message that send at one node is passed to a group of node, an aggregation tree is a tree that data is passed from many node to one destination node. Through an experiment we confirmed that the restoration scheme that uses aggregation tree shows taster speed comparing with the existing other restoration scheme.

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Distributed Restoration Solution Algorithm Improving Reliability in Intelligent Distribution Management System (신뢰성이 향상된 배전지능화 시스템의 복구해 알고리즘)

  • Lim, Il-Hyung;Choi, Myeon-Song;Lee, Seung-Jae;Lee, Sung-Woo;Kwon, Sung-Chul
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.9
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    • pp.1651-1657
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    • 2009
  • In this paper, restoration solution algorithm to improve reliability better than restoration system of DAS(Distribution Automation System) is proposed in IDMS(Intelligent Distribution Management System). A strategy of IDMS restoration system to improve reliability and efficiency is proposed by analysis restoration system in DAS. Restoration sequence algorithm, distributed restoration solution algorithm considering a characteristic and a suitable restoration solution algorithm in IDMS are proposed. In the case study, algorithms have testified with example distribution network by C language

Contingency Analysis about Restoration of outage in Distribution System (정전복구에 대한 배전계통 상정사고 해석법)

  • Park, Jeong-Eun;Kim, Hyung-Seung;Choi, Myeon-Song;Lee, Seung-Jae;Lim, Seong-Il;Hyun, Seung-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.65 no.8
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    • pp.1317-1325
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    • 2016
  • This paper identifies the issues of contingency analysis for restoration in distribution systems. Contingency analysis has been applied to transmission systems but not to distribution systems. The distribution system is different from transmission system. So it is hard to apply for existing contingency analysis to distribution system. In this paper, a new contingency analysis method for distribution systems is proposed. The proposed method is based on service restoration capability. It aims to minimize outage left after service restoration in case of a fault in advance. The method estimates the vulnerability which is represented by zone restoration index proposed in [1]. Applying the proposed method, operators could change the system so that it does not leave any outage left after restoration. Case study has been carried out on a five feeder system and its results show effectiveness of the method.

(A Network Fault Recovery Algorithm based on a Segment Automatic Restoration Scheme) (세그먼트 자동복구 기반의 네트워크 장애 복구 알고리즘)

  • Shin, Hae-Joon;Kim, Ryung-Min;Kim, Young-Tak
    • Journal of KIISE:Information Networking
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    • v.30 no.3
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    • pp.448-460
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    • 2003
  • In this paper, we propose a network fault recovery algorithm based on a segment restoration scheme to reduce restoration time and restoration resource. The proposed segment restoration scheme is based on network partitioning which divides a large network into several small subnetworks. The restoration performance of the proposed segment restoration scheme depends on the size and the topology of subnetworks. Since most faults can be restored in a subnetwork, restoration time is reduced obviously. We compare and analyze restoration performance according to the size of subnetworks and restoration schemes. From simulation results, the proposed segment restoration scheme has the shortest restoration time compared with other restoration schemes. Especially the restoration performance of the proposed segment restoration scheme is better than the SLSP, which is also a segment-based restoration scheme, in terms of restoration time and required restoration resource capacity.

A Study on the Restoration System for Distribution Network (배전계통의 정전복구 시스템에 관한 연구)

  • Lee, Heung-Jae;Lee, Chul-Kyun
    • Proceedings of the KIEE Conference
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    • 1997.07c
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    • pp.761-763
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    • 1997
  • As the power system network is enlarged and complicated gradually, the automation of power system network is essential to enhance the reliability and performance of the operation of power system. Distribution restoration is a major part of the automation. This paper proposes a new distribution restoration system to restore healthy blackout regions by the hierarchical cooperation with the substation automation systems. In proposed system, the range of restoration is extended to substations and the performance as well as the switching efficiency of restoration system is enhanced.

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