• Title, Summary, Keyword: Fault restoration

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Improvement and Application Effect in Fault Restoration Program based on Distribution Automation System of KEPCO (한전의 배전자동화 기반 배전선로 고장처리 프로그램 개선 및 적용 효과)

  • Park, So-Young;Shin, Chang-Hoon;Ha, Bok-Nam;Lee, Seong-Woo;Park, Min-Ho
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.267-271
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    • 2009
  • This paper presents the improvement and application effect in fault restoration program based on distribution automation system(DAS) of KEPCO. When a fault occurs, fault restoration program can detect fault section based on FI information of DAS, and calculate the best restoration solution by comparing the load capacity of outage area and the spare load capacity of connected distribution lines, and propose switch operating procedure for fault section isolation and outage restoration. Fault restoration program was applied to real field and it was verified that this program is applicable to diverse field cases. By using this fault restoration program to the field human error can be reduced and fault procedure can be more reliable, accurate, and fast.

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A New Algorithm of The Line to Ground Fault Section Isolation & Restoration in Ungrounded Distribution Power System (비접지 배전 계통에서 지락사고 시 고장구간 분리 및 복구를 위한 새로운 알고리즘)

  • Choi In. S.;Choi Myeon. S.;Lim Seong. I.;Lee Seung. J.
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.53 no.10
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    • pp.550-555
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    • 2004
  • Fault section isolation and service restoration are very important for function of DAS. In Japan, a progressive protection method is used for the line to ground fault section isolation and service restoration. But the progressive protection method has a drawback that the customer will experience outage time and that the rate in use of the feeder is not over 50%. This paper presents a new Service Restoration Algorithm which is for the line to ground fault section isolation and service restoration method for a ungrounded distribution system. If the proposed algorithm is used, the rate in use of the feeder can improve than before because a distribution system can change multi connection of feeder and the customer's outage time can be reduced. The proposed algorithm has been successfully tested in a distribution system.

The Self-Fault Determination and Restoration Methodology based on the Ethernet Communication (이더넷 통신기반의 자율적 고장 판단 및 복구 방법론 연구)

  • Ko, Yun-Seok;Lee, Seo-Han;Choi, Hyun-Chul;Shin, Jae-Hyun
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.9
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    • pp.1674-1680
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    • 2009
  • This paper proposes an autonomous fault determination, fault zone isolation and fault restoration strategy based on the ethernet communication as a new attempt to solve the problem the of the existing central control method. In proposed method, The FRTU(Feeder Remote Terminal Unit)s on the feeder determines autonomously where the faulted zone is by exchanging the voltage and current information with neighbor FRTUs based on the network communication, and then separates the faulted zone in an nil-voltage status to make the protective device to reclose successively. In particular, the minimization of outage time and relational load balancing is archived by each interconnection switch which determines autonomously the load zone to be allocated among those zones after the sound outage zones was separated individually. Finally, to show effectiveness of the proposed fault restoration strategy, the several fault cases are simulated for the test distribution system, and the load balancing index of the proposed solution is compared with all of feasible solutions.

Fault Pattern Analysis and Restoration Prediction Model Construction of Pole Transformer Using Data Mining Technique (데이터마이닝 기법을 이용한 주상변압기 고장유형 분석 및 복구 예측모델 구축에 관한 연구)

  • Hwang, Woo-Hyun;Kim, Ja-Hee;Jang, Wan-Sung;Hong, Jung-Sik;Han, Deuk-Su
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.9
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    • pp.1507-1515
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    • 2008
  • It is essential for electric power companies to have a quick restoration system of the faulted pole transformers which occupy most of transformers to supply stable electricity. However, it takes too much time to restore it when a transformer is out of order suddenly because we now count on operator in investigating causes of failure and making decision of recovery methods. This paper presents the concept of 'Fault pattern analysis and Restoration prediction model using Data mining techniques’, which is based on accumulated fault record of pole transformers in the past. For this, it also suggests external and internal causes of fault which influence the fault pattern of pole transformers. It is expected that we can reduce not only defects in manufacturing procedure by upgrading quality but also the time of predicting fault patterns and recovering when faults occur by using the result.

(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.

Evaluation of Restoration Capability in Radial Primary Distribution System (배전계통의 복구능력 평가방법)

  • Lim, Seong-Il;Ha, Bok-Nam;Lee, Jung-Ho;Cho, Nam-Hun;Lee, Seong-Jae
    • Proceedings of the KIEE Conference
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    • pp.267-269
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    • 1999
  • One of the main jobs of the operators is to make it sure to have a service continuity in a fault situation. This paper proposes a restoration index which indicates the restoration capability of the feeder in case of a fault. A necessary and sufficient condition for a feeder to have 100% restoration of the outage is also described.

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A Study on Improvement of Restoration Ability by Fault Simulation Training (모의사고 훈련을 통한 급전원의 고장복구 능력향상에 관한 연구)

  • Kim, T.W.;Lee, B.S.;Lee, W.S.
    • Proceedings of the KIEE Conference
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    • pp.149-151
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    • 2011
  • This paper describe that restoration ability raising method of power system operator when Power System fault happen. This paper introduce score management method about simulation training when supposed fault happened and essencial fault have to be trained for power system operator.

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Restoration of Distribution System with Distributed Energy Resources using Level-based Candidate Search

  • Kim, Dong-Eok;Cho, Namhun
    • Journal of Electrical Engineering and Technology
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    • v.13 no.2
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    • pp.637-647
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    • 2018
  • In this paper, we propose a method to search candidates of network reconfiguration to restore distribution system with distributed energy resources using a level-based tree search algorithm. First, we introduce a method of expressing distribution network with distributed energy resources for fault restoration, and to represent the distribution network into a simplified graph. Second, we explain the tree search algorithm, and introduce a method of performing the tree search on the basis of search levels, which we call a level-based tree search in this paper. Then, we propose a candidate search method for fault restoration, and explain it using an example. Finally, we verify the proposed method using computer simulations.

The Self-Fault Restoration Methodology based on the Recloser in the Distribution Systems (배전계통 리클로우저 기반의 자율적 고장복구 방법론)

  • Ko, Yun-Seok
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.9
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    • pp.1681-1688
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    • 2009
  • This paper proposes a new fault restoration method which adopts the recloser as top agent to release the problems of the data concentration and fault processing delay of the existing DAS(distribution Automation System) under the ubiquitous distribution system. In proposed method, top agent collects the data based on the multi-casting communication with the tie switches of the interconnection point, and then selects a closed switch(tie switch) to transfer the sound outage load to other feeders based on the heuristic search strategy step by step until the load transfer work is finished. Here, a new heuristic rule is developed which can guarantee the relational load balancing and line loss from the collected voltage data. Finally, the several faults are simulated for typical multi-section and multi-interconnection distribution system to prove the effectiveness of the proposed strategy, in particular, for each simulation cases, the load balancing index and line loss index of the obtained solution from the proposed method is compared with those of all of feasible solutions.

Fault Location Algorithm in a Two-ended Sources Transmission Line (양전원 송전선로의 고장점 표정 알고리즘)

  • Park, Chul-Won
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.65 no.1
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    • pp.18-24
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    • 2016
  • In order to service restoration and enhance power system reliability, a number of impedance based fault location algorithms have been developed for fault locating in a transmission line. This paper presents an advanced impedance-based fault location algorithms in a two-ended sources transmission line to reduce the DC offset error effects. This fault location algorithm uses of the GPS time synchronized voltage and current signals from the local and remote terminal. The algorithm uses an advanced DC offset removal filter. A series of test results using ATPdraw simulation data show the performance effectiveness of the proposed algorithm. The proposed algorithm is valid for a two-end sources transmission network.