• Title/Summary/Keyword: 전력 장애

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The Cost Analysis of Network by The Function of Automatic Link Recovery (자동링크복구 기능에 따른 네트워크 비용분석)

  • Song, Myeong-Kyu
    • The Journal of Korea Institute of Information, Electronics, and Communication Technology
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    • v.8 no.6
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    • pp.439-444
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    • 2015
  • The Social infrastructure systems such as communication, transportation, power and water supply systems are now facing various types of threats including component failures, security attacks and natural disasters, etc. Whenever such undesirable events occur, it is crucial to recover the system as quickly as possible because the downtime of social infrastructure causes catastrophic consequences in the society. Especially when there is a network link-failure, we need an automatic link-recovery method. This means that customers are aware of network failures that can be recovered before you say that service. In this paper, we analysis the relation between Auto-recovery performance and cost.

154KV 전력계통 직접접지시통신선 유도장애에 관한 실험적 연구 3

  • 장상현;김봉업;김용배
    • 전기의세계
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    • v.16 no.5
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    • pp.51-62
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    • 1967
  • Relay Protector의 자체특성시험을 한 다음 대전-이리, 대구-상주, 대구-진영 간의 154KV 송전선과 이를 인접역행하는 통신선에 Relay Protector를 취부하고 이 구간의 154KV 송전선을 직접접지한 후에 실제로 인공고장을 이르켜 Relay Protector의 성능실험을 하였다.

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중공의 석유수출 현황과 전망

  • Korea Petroleum Association
    • Korea Petroleum Association Journal
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    • no.12 s.58
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    • pp.31-37
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    • 1985
  • 이미 세계 4대 상업에너지 생산국으로 등장한 중공은 석유, 가스 석탄, 전력등 에너지원의 막대한 개발잠재력을 지니고 있다. 그러나 빈약한 하부구조 및 개발을 위한 기술인력의 부족으로 인하여 오히려 에너지부족을 겪고 있으며, 이것은 중공이 추진중인 산업현대화에 주요한 장애요인이 되고 있다. 따라서 중공은 서방과의 협력을 모색, 70년대말 문호개방을 서두르게 되었다. 에너지개발을 포함하여 준공의 진출하는 외국기업들은 오는 21세기까지 활동영역을 넓혀나갈 것으로 예상된다.

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Design Considerations for Communication Systems and Power Systems for Seismic Data Acquisition (지진관측자료 수집을 위한 정보통신망과 전력체계의 요건)

  • Yoo, Sehoon;Song, Sehyun;Kim, Kichul;Choi, Seong Jong
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2011.07a
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    • pp.167-168
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    • 2011
  • 한반도 및 근해의 지진 지진해일 감시를 위해 지진관측망이 구축되어 있다. 이러한 지진관측망는 향후 조기경보를 위해 보다 조밀하게 설치될 예정이다. 지진계측기의 정보통신망은 대부분 행정망 및 전용회선 단일망으로 운영되고 있으며 지진계측기의 전력체계는 상용전원의 단일 전력체계로 운영되고 있다. 국내 지진관측망 운영상의 문제점으로 단일 정보통신망 운영으로 인한 통신 단절 발생 시 지속적인 자료 수집 불능과 단일 전력체계인 상용전원 단절시 통신장비에 전원공급 단절로 인한 실시간 자료 전송 장애 발생이 있다. 또한 지진관측기의 정보통신망과 전력체계에 대한 원격감시 및 관리 기능이 부재하여 유지 보수 및 안정적 자료수집에 취약점을 가지고 있다. 이러한 취약점을 극복하기 위해서는 각종 재해에 대한 내재해성과 유지보수성을 향상시키는 것이 시급하며 정보통신망과 전력체계의 다중화/이중화가 좋은 대안이 될 수 있다.

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A Stduy on the Signal Anti-reduction Equipment in Power Line Communication (전력선 통신 시스템을 위한 신호 감쇠 저하 장치 연구)

  • 고종선;김주환;윤성구;이기원
    • The Transactions of the Korean Institute of Power Electronics
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    • v.5 no.4
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    • pp.370-376
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    • 2000
  • In this paper, a communication system that is not using the communication line but power line is presented. It will be very useful for an information-oriented society with tele-metering and home automation. Conventional system has a difficulty in transmitting information due to decreasing communication voltage and increasing carrier current. Proposed idea is a special type switching amplifier system which has a low inner resistance. It can provide reactive power and does not have low impedance between the transceivers. This new system is proposed to overcome the loss of conductor load in a PLC system.

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A Study on the Adduction and Abduction Measurement of Children with Spastic Cerebral Palsy for the Development of Multi-axial Lower Extremity Orthosis (경직성 뇌성마비 소아의 다축 하지 보조기 설계를 위한 내.외전력 측정)

  • 김동진;이영신;김봉옥;양신승;박인식
    • Journal of Biomedical Engineering Research
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    • v.24 no.5
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    • pp.443-446
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    • 2003
  • In the present study. the design of multi-axial lower extremity orthosis was presented with adduction and abduction force data which were measured from three children with cerebral palsy and a normal child. The measurements of adduction and abduction forces were conducted in standing and wolking condition. Adduction and abduction forces were measured by strain gages which were attached on the lateral uprights of lower extremity orthoses. In the standing condition. addcution force of childrens was distributed from 0.11 kgf to 0.26 kgf. During the walking condition. adduction force was reached to 1.56 kgf and abduction force was reached to 1.52 kgf.

The study on Harmonic Current Generated on Power Supply Station in(for) Conventional line and The Review on Effect of facility reducing Harmonic Current. (기존선 변전소에서의 고조파 발생현황과 저감설비 설치 효과 검토)

  • Park Sang-Ock;Lee Jong-Woo;Kwon Sam-Young;Lee Chang-Moo
    • Proceedings of the KSR Conference
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    • 2004.10a
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    • pp.1309-1315
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    • 2004
  • The harmonic current originated from electric cars will be cause of electromagnetic interference along adjacent communication cables and troubles with signaling. It will also cause overheating in power capacitor and malfuction in protection relay. Therefore, it brought actual measurement of harmonic current by each operation mode. Because the result exceeded the value prescribed by Korea Electric Power Corporation, we constructed facilities reducing harmonic current on overloaded part at each power supply station located in conventional line (Guro, Kyungsan, and Milyang) as an optimal alternative. Then, this study compared and analyzed the reducing effect before and after constructing facility.

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Data Coding Scheme to Reduce Power Consumption and EMI in LCD Driving Systems (LCD 구동 시스템에서 전력 소비 및 전자기 장애를 줄이기 위한 데이타 코딩 방법)

  • Choi, Chul-Ho;Choi, Myung-Ryul
    • Journal of KIISE:Computing Practices and Letters
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    • v.6 no.6
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    • pp.628-634
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    • 2000
  • We propose a data coding scheme for reducing' power consumption and ElVII in transmitting a sequence of data from LCD controller to LCD driver. The proposed coding scheme makes use of reducing data transitions in general text image of PC. It can be implemented with a little hardware and applied to the real-time applications of LCD driving system. We have executed computer simulations of the proposed coding scheme and compared the results of the proposed scheme with those produced by the existing coding schemes. The proposed coding scheme, compared to the existing ones, reduces the switching activity significantly in both of text and picture images.

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AMI Network Failure Analysis based on Graph Database (그래프 데이터베이스 기반 AMI 네트워크 장애 분석)

  • Jeong, Woo-Cheol;Jun, Moon-Seog;Choi, Do-Hyeon
    • Journal of Convergence for Information Technology
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    • v.10 no.7
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    • pp.41-48
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    • 2020
  • Recently, the spreading business of AMI (Advanced Metering Infrastructure) remote metering systems in various regions of the country has been activated, and it provides various metering functions such as two-way communication and security plan functions for power demand management. Current AMI system is difficult to analyze based on the existing RDB(Relational Database) due to the increase in the size of new internal IoT devices and networks. This study proposes a new GDB(Graph Database) based failure analysis method that utilizes existing RDB data. It analyzes the correlation of new failure patterns through accumulated data such as internal thresholds and status values. As a result of GDB-based simulation, it was confirmed that RDB can predict to a new obstacle pattern that was difficult to analyze.