• Title, Summary, Keyword: Electric power cable

Search Result 467, Processing Time 0.036 seconds

Type-tested of Accessories for 345kV Oil Filled Cable (345kV OF 케이블용 부속재의 인정시험완료)

  • Lee, S.K.;Choi, S.G.;Kim, K.S.;Lee, K.H.;Jeon, S.I.;Huh, G.D.;Park, W.K.;Choi, M.K.;Lee, S.H.;Kim, S.J.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.261-264
    • /
    • 1997
  • Joints and terminations for 345kV Oil Filled $1C{\times}2000mm^2$ cable have been developed and tested including BPT (Bellows Pressure Tank) on the bases of various ultra-high voltage technologies. Electrical design was performed by using Finite Element Method. The type test certified by KEPCO (Korea Electric Power Corporation) has been performed as the final stage of development. In order to confirm the reliability of long-term life for 30 years, load cycle test was conducted for 30 days with good result. As the result, the techniques we obtained from this development are applicable to higher voltage level systems (i.e. 765 kV).

  • PDF

Development of Pre-Mold Joints for High Voltage Cable System (I) (초고압 프리몰드형 접속함 개발 (I))

  • Lee, S.K.;Ko, E.K.;Kim, Y.H.;Baik, S.Y.;Kim, K.S.;Huh, G.D.;Park, W.K.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.1031-1033
    • /
    • 1999
  • The performance of cable joints for extra high voltage XLPE cable system is rapidly advancing combined with the development of insulation materials. The current trend of joints is in the direction of requiring less jointing techniques and installation time. This paper describes the performance of currently used joints regarding to their practical aspects and analyses design and manufacturing techniques for Pre-Mold Joint and Pre-fabricated Joint Box. Especially, basic tests and their results to obtain the design Parameter of PMJ are introduced.

  • PDF

High frequency partial discharge measurement by metal foil electrode (박전극을 이용한 고주파 부분방전 측정 연구)

  • Kim, C.S.;Shin, D.S.;Lee, C.Y.;Kim, J.N.;Baek, J.H.;Kim, D.W.;Park, W.K.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.1081-1083
    • /
    • 1999
  • The capacitive coupling technique has been used as conventional method for PD detection on the power cable line. Recently, however PD measurement using by high frequency is known to have an excellent sensitivity comparison with low frequency on-site. In this paper, the high frequency characteristic of two type of metal foil sensor was studied and the technique was proved to be more effective diagnostic method than conventional method for qualification of EHV cable and accessories.

  • PDF

A Study on Monitoring Means of Insulation deterioration of Electric Power Cable (전력케이블 열화 감시방안에 관한 연구)

  • Han, Hag-Su;Min, Kyung-Yun;Ryu, Ki-Son
    • Proceedings of the KSR Conference
    • /
    • /
    • pp.1522-1528
    • /
    • 2007
  • Electric Power cable is the apparatus that receives electric power from the Korea Electric Power Corporation and supplies electric power to electric train and annex facilities of each railway station. With substantial ripple effect during power blackout accidents, such power blackout accidents must be coped with by discriminating the status of insulation deterioration of electric power cable in advance. Discrimination of insulation deterioration of the electric power cable is normally executed while the power is disconnected and it is very difficult to discover, at early stage, the insulation deterioration of the power cable in operational state since the duration of inspection is limited. This research aims to consider method of diagnosing the insulation deterioration of electric power cable in On-Line state rather than diagnosis in Off-Line state in order to secure reliability of power supply by reducing duration of power blackout (accidental blackout and blackout during works) and by seeking reduction in equipment and manpower used in diagnosis of deterioration through prevention of the accident itself prior to occurrence through early restoration of accident due to insulation deterioration of the electric power cable and assessment of performance of the cable under operation.

  • PDF

The mechanical characteristics of 345kV XLPE cable (345kV XLPE 2000$mm^2$ 케이블의 기계적특성 고찰)

  • Nam, S.H.;Baek, J.H.;Heo, H.D.;Lee, S.H.;Kim, C.M.;Lee, S.K.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.1688-1690
    • /
    • 2001
  • The mechanical characteristics of XLPE cable is basic to the installation design. Especially, snake and offset design require accurate coefficient of linear expansion($\alpha$), Young's modulus(E) and bending stiffness(El) of the cable. In this paper, $\alpha$, E and El of 345kV XLPE cable was measured by experimental setup, and verified by measuring axial tension and lateral displacement in snake installation.

  • PDF

The Development of the compact accessories for 230kV XLPE cable (Compact 230kV 케이블용 접속함 개발)

  • Lee, Hyeong-Seok;Son, Si-Ho;Kim, Kwang-Soo;Lee, Kwang-Yeol;Chang, Ki-Wook;Bai, Kyung-Moo
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.1075-1077
    • /
    • 1999
  • XLPE cables are being used more widely all over the world as extra-high voltage transmission lines owing to the superior characteristics compared to OF cables. In view of the worldwide trend of utilizing high stress cables, we developed the accessories for 230kV XLPE cables which have smaller insulation thickness than that of present cables. The performance of the newly developed 230kV cable and its accessories has superior inital characteristics. As a result, the improved reliability of 230kV XLPE cable system has been obtained. This paper describes the major design concept and the test results of development procedure.

  • PDF

The study on slipping down phenomenon of 345kv XLPE cable in inclinatior (경사지에서의 345kV XLPE $1C{\times}2000mm^2$ 케이블 코아 활락 현상 연구)

  • Baek, J.H.;Nam, S.H.;Lee, S.K.;Heo, H.D.;Kim, D.W.;Park, W.K.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.1782-1784
    • /
    • 2002
  • In this paper, the coefficient of friction betwee and sheath in 345kv XLPE cable was measured the simulated inclinated condition of You-Youngdeungpo transmission line. The phenomena of slipping down the simu inclination was investigated theoretically usin measured data and was analyzed from experim result. The measured and analyzed result were conside be as a reference data for real installation of XLPE Youngseo-Youngdeungpo transmission line.

  • PDF

A Study of Partial Discharge Patterns On the Simulated Interface of Prefabricated Joint for Ultra Power Cable (초고압 XLPE 케이블용 조립형 직선 접속함을 모의한 계면질서의 부분방전 패턴 연구)

  • Baek, J.H.;Kim, J.N.;Shin, D.S.;Lee, C.Y.;Kim, C.S.;Kim, D.W.;Park, W.K.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.1102-1104
    • /
    • 1999
  • It is very essential to find out defects and remove them in the insulation at the early stage because the defects in the insulation induce PD which deteriorates the material, resulting in the breakdown. In the real application of high voltage, the interface of the different insulation is the weakest place for both electrical and mechanical aspects. In this paper, characteristics of PD caused by the artificial defects, such as metallic particles, voids and moist fibers, at the interfaces of the cable joint (PJB) were investigated using the specially designed electrode system.

  • PDF

A study on the application of testing termination for XLPE Power Cable by Resistivity Grading Method Using Semi-conductive material (반도전 재료를 이용한 Resistivity grading 방식의 XLPE절연 전력케이블용 시험단말에 관한 연구)

  • Lee, C.Y.;Shin, D.S.;Dudkin, Sergey M.;Kim, D.W.;Park, W.K.
    • Proceedings of the KIEE Conference
    • /
    • /
    • pp.1105-1107
    • /
    • 1999
  • The purpose of termination for high voltage tests of XLPE power cable is to prevent flashover during the breakdown test of specimen as well as to withstand the specified voltage between its conductor and screen without failure. For easier treatment and simpler construction of testing termination, resistivity grading method using semi-conductive material was employed. Based on the fundamental theory, its failure characteristics by changing the resistivity of semi-conductive material on the insulation surface was investigated. With two layers construction by difference resistivity on their surfaces, much improved result than that of one resistivity was obtained through the experiment for MV cable.

  • PDF

The Measurement of Electromagnetic Wave in Power Cable Tunnel of Underground Utility Tunnel (전력구 내 전자기파에 대한 작업 환경 측정)

  • Kang, Dae Kon;Park, Jai Hak
    • Journal of the Korean Society of Safety
    • /
    • v.34 no.1
    • /
    • pp.1-7
    • /
    • 2019
  • Electromagnetic measurements of the power cable tunnel were conducted from August 10 to 20, 2018, in the ${\bigcirc}{\bigcirc}$ city underground utility tunnel. During this period, the average temperature was $31.89^{\circ}C$ and the humidity was 67.56% in power cable tunnel. As a result of the electromagnetic measurement, the highest electric field was 25.3 V/m and the magnetic flux density was $42.6{\mu}T$. The average electric field was 18.56 V/m and the magnetic flux density was $29.32{\mu}T$ in the power cable tunnel. As a result of comparison with the electric equipment technical standard, the electric field in the power cable tunnel was 0.5% of the electric equipment standard and 35.2% of the magnetic flux density. It's similar value that electric field is about robotic vacuum(15.53 V/m), and magnetic flux density is similar value about capsule- type coffee machine ($23.07{\mu}T$). The number of cable lines and the size of the electromagnetic waves were not proportional to each other through comparison of cable lines in the power cable tunnel. It was confirmed that 154 kV, rather than 22.9 kV, could have a greater influence on occupational.