• Title, Summary, Keyword: Live line

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Analysis and Applicability Assessment of Robotic Live-Line Electricity Distribution Technology (로봇을 활용한 배전 활선공법 기술분석 및 적용 타당성 연구)

  • Yang, Seon-Je;Kuc, Tae-Yong;Park, Choon-Sik;Seo, In-Yong
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.67 no.9
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    • pp.1125-1140
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    • 2018
  • This paper analyzes robotic technology developed for live-line electricity distribution and its applicability to domestic environment. In doing so, available robotic systems developed for the live-line work are thoroughly investigated and compared in terms of from robotic functionality to economic feasibility. To assess the technology readiness for domestic live-line robot, the rubber gloves based direct live-line engineering methods have been also analyzed and mapped into robotic technology requisites. The results are expected as a fundamental data to help with solving the safety and economics issues when considering development and introduction of compact live-line robot for complex domestic electricity distribution environment.

Conductive Clothing Techniques and Application Status To Live Line Works in T/L (송전선로 활선작업용 도전복 기술 및 적용현황)

  • Lee, H.K.;Han, H.J.;Bang, H.K.
    • Proceedings of the KIEE Conference
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    • pp.2123_2124
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    • 2009
  • Nowadays live-line work is a general maintenance method in most countries. After 765kV transmission lines constructed, necessity of the live line work is on the rise, due to maintenance problems. During live line working, a line man must wear the conductive clothing for protection from electrical fields and shocks. This paper suggests about design technology and application status of a conductive clothing to live works, before developing the clothing in detail.

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Study on the Necessity of Risk Assessment for The Live-Line working of Electrical Construction (전기공사업 활선작업의 위험성평가 필요성에 관한 고찰)

  • Choi, Seung-Dong;Hyun, So-Young;Han, Hyeong-Ju;Hong, Yong-Soo
    • Proceedings of the Safety Management and Science Conference
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    • pp.719-730
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    • 2011
  • The live-line works are very dangerous works on direct contacts or neighboring contacts with the distribution line. But most of domestic electrical construction companies that have performed live-line works are small-scale companies. Accordingly, safety management system and manuals to insure worker's safety haven't sufficiently had. In this paper, risk and status of accidents for the live-line works were analyzed and the necessity of introducting risk assessment for live-line works was identified by a questionnaire survey of electrical construction companies and education institutions.

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Analysis of Electrical Safety Level Test for Barehand Work at 765kV Vertical Double Circuit Six Bundle Conductors on the Suspension String Tower Type (765kV 수직2회선 6도체 현수형 철탑에서 직접활선작업의 안전성 평가분석)

  • Kim, Dae-Sik;Han, Sang-Ok
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.57 no.3
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    • pp.275-278
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    • 2008
  • It has been issued that the necessity of Live line work for 765kV vertical double circuit six bundle conductors transmission line when the characteristics of transmission line, the composition of T/L and near the T/L circumstances etc. Others are considered. The Barehand method of UHV T/L is extremely dangerous work and especially it is directly related with lineman life so it is very dangerous. It should be performed several technology developments for live-line work on the UHV T/L, that should be considered such as the electrical influence on workers near the T/L, development of live-line facilities, guarantee of safety, the technical rules of live-line work, the safe method of live-line work and etc. In order to maintain the 765kV transmission lines safely by barehand work, first of all, we should know the analysis of electrical safety level test in live-line work at 765kV vertical double circuit six bundle conductors on the suspension string tower type.

765kV Transmission maintenance live-line work study (765kV 송전선로 유지.보수 활선공법 고찰)

  • Choi, Han-Yeol;Min, Byeong-Wook
    • Proceedings of the KIEE Conference
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    • pp.723-724
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    • 2007
  • Live line work is well known for mending and maintenance of electrical power equipment. Nowadays needs of electric power supply quality require live line work In Korea, live line work is needed since 765kV transmission operation and restructure of electric power industry has changed. In other words, in case of suspension of power supply on the transmission is getting hard to keep up with efficiency of transmission operation, customer's confidence and generation-limited cost. Therefore live line work is very meaningful. As the condition of 765kV Transmission both bare hand and Helicopter live line technique must be used in moderation because of economic, geographical, environmental circumstances around steel tower.

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Live line maintenance technique trend of UHV T/L (초고압 송전선로의 활선공법 기술 동향)

  • Lee, Dong-Il;Choi, In-Hyuk;Jung, Yoon-Hwan
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • pp.260-264
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    • 2005
  • This paper gives a basic information of live line maintenance technique of UHV T/L and introduce a technical background and trends of domestic and abroad. The importance of live line maintenance technology getting increased because the change of power system environment and maintenance conditions in korea. this paper explain the present state of the development of live line maintenance technique in korea and show a difference with advanced countries.

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A Study on the Hazard Factor and Safety Management at Transmission Line During Live Line Works (송전선로 직접활선공법의 위험요인과 안전대책에 관한 연구)

  • Choi, Seung-Dong;Kang, Kyong-Sik
    • Journal of the Korea Safety Management & Science
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    • v.8 no.3
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    • pp.51-66
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    • 2006
  • This study was attempted to analyze risk factors and suggest accident prevention in live line works for power transmission lines to be developed and applied in Korea. Safety problem cannot but occur at development of live line works and application to the field. With respect to this, problems likely to occur in the field among works adopting methods of works including live line works for power transmission lines were investigated and analyzed through documentary survey and risk assessment method. The results are summarized as follows. A risk assessment method model was suggested. This method enables scientific and systematic development of safety control. That is, the owner may autonomously induce safety control and build risk assessment database by work process to use them as best training data for workers. Also, in the field, it may induce all workers to participate in safety program and secure safety by making workers seek for safety working method under smooth flow from looking at risk factors to accident prevention activities. It is deemed that this humble study will prevent both accident and injury likely to occur in live line works for power transmission lines.

Electrical Consideration in OPGW Live-Line Installation (활선 상태에서의 OPGW 가선 시 전기적인 현상 고찰)

  • Baek, Ju-Heum;Kim, Jung-Nyun;Jeon, Seung-Ik;Kim, Byung-Soo;Lee, In-Ho
    • Proceedings of the KIEE Conference
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    • pp.127-129
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    • 2005
  • OPGW(Optical Ground Wire) whose demand is increasing worldwide have composite function as optical communication and grounding for preventing transmission line from lightning. While continuous efforts have been made to increase the transmission capacity and speed, the working method to replace the existing ground wire with OPGW under live-line condition is coming to force newly as installation aspects. Particularly, this requirement became more serious in developing country that the electric power supply is not sufficient and power outage is impossible for supply and dead of electric power LS cable Ltd. has developed the new installation method in full live-line condition to solve the confronted problem and to meet the market demand. In this paper, Electric Problems in live-line installation is considered to predict dry-band arcing. This can be used by Makers to predict dry-band arcing in insulating ropes installed on earth wire of power transmission system.

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Development of a Live-line Insulator Inspection Tool System for 154 kV Power Transmission Lines

  • Lee, Jae-Kyung;Park, Joon-Young;Cho, Byung-Hak;Oh, Ki-Yong
    • Journal of Electrical Engineering and Technology
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    • v.7 no.1
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    • pp.23-33
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    • 2012
  • The current paper deals with a new live-line insulator inspection tool system that will be used by the Korea Electric Power Corporation for its 154 kV power transmission lines in 2011. Unlike the existing contact type tools, the developed inspection tool automates parts of the insulator inspection process using a sensor and an actuator. The tool sustains its weight independently, not by a lineman. In addition, the inspection tool measures the insulation resistance of an insulator together with its distribution voltage, thus providing more information for analysis and diagnosis. Such characteristics improve the system's operation efficiency, measurement reliability, and usability. We confirmed its effectiveness through live-line field tests with actual power transmission lines.

Switching Impulse Flashover Tests and Analysis for 765kV Jumper V-strings with Damaged Insulators

  • Choi, In-Hyuk;Shin, Koo-Yong;Lee, Dong-Il;Lim, Jae-Sup;Kim, Young-Hong;Lee, Hyung-Kwon
    • Journal of Electrical Engineering and Technology
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    • v.8 no.2
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    • pp.359-363
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    • 2013
  • The 765kV transmission line will be maintained by live-line works for efficient operation. In order to maintain the 765kV transmission lines safely by live-line works, lineman has to know switching impulse flashover characteristics of the jumper V-strings with damaged insulators in advance. In order to know the flashover characteristics this paper carried out experimental flashover mockup tests for jumper V-string with damaged insulators in the outdoors. And it suggests flashover characteristics of the 765kV jumper V-strings also. The results will be used in estimating the safety of live working for 765kV transmission lines.