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THE DEVELOPMENT OF ULTRAHIGH VOLTAGE XLPE CABLE ACCESSORIES (초고압 XLPE 케이블 접속재 개발)

  • Bae, K.M.;Jeon, S.I.;Yoo, K.S.;Kweon, H.S.;Lee, K.H.;Lee, K.C.;Han, K.M.
    • Proceedings of the KIEE Conference
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    • 1991.07a
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    • pp.271-273
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    • 1991

  • We have developed 154kV XLPE (Cross-linked Poly-ethylene) Cable accessories which show excellent performances. The results obtained from experiments using miniature model justified our electrical design and adopted materials, and assembly tests verified higher reliability of these accessories. Basic concepts of design and test, test results and failure analysis are presented.

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ON THE γ-TH HYPER-KLOOSTERMAN SUMS AND A PROBLEM OF D. H. LEHMER

  • Tianping, Zhang;Xifeng, Xue
    • Journal of the Korean Mathematical Society
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    • v.46 no.4
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    • pp.733-746
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    • 2009

  • For any integer k $\geq$ 2, let P(c, k + 1;q) be the number of all k+1-tuples with positive integer coordinates ($a_1,a_2,...,a_{k+1}$) such that $1{\leq}a_i{\leq}q$, ($a_i,q$) = 1, $a_1a_2...a_{k+1}{\equiv}$ c (mod q) and 2 $\nmid$ ($a_1+a_2+...+a_{k+1}$), and E(c, k+1; q) = P(c, k+1;q) - $\frac{{\phi}^k(q)}{2}$. The main purpose of this paper is using the properties of Gauss sums, primitive characters and the mean value theorems of Dirichlet L-functions to study the hybrid mean value of the r-th hyper-Kloosterman sums Kl(h,k+1,r;q) and E(c,k+1;q), and give an interesting mean value formula.

  • https://doi.org/10.4134/JKMS.2009.46.4.733 인용 PDF KSCI

Development of 132 kV Standard Potential Transformer and Stability Test (132 kV 초정밀 전압변성기(PT) 개발 및 안정도 평가)

  • Kwon, Sung-Won;Lee, Sang-Hwa;Jung, Jae-Kap;Kim, Mun-Seog;Kim, Jae-Young;Lee, Sung-Ha
    • Proceedings of the KIEE Conference
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    • 2009.07a
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    • pp.1387_1388
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    • 2009

  • High accurate and stable 132 kV potential transformers (PTs) including 66 kV & 22 kV PT with stability of less than 0.0033 % for 13 month and with ratio error within $\pm$ 0.024 % at full rated voltage have been developed. The PTs are useful as the reference PT of the PT comparator system in the voltage range of 11 kV to 132 kV PT.

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