뇌충격전압 측정시스템의 국제 비교시험-II

Intercomparison of Ll measurement system of KERI

To compare the lightning impulse measurement capabilities of high voltage laboratory, a lightning impulse voltage measuring system from HUT is circulated around the world. This paper presents test results after second round of this worldwide exercise. KERI's impulse voltage measuring system compared with the circulating reference measuring system from HUT at voltage levels of 80, 160, 240, 320 and 400 kV. Three impulse shapes were used, i.e. full smooth lightning impulse with both short (0.84 $\sim$ 0.95 ${\mu}s$) and long front (1.45 $\sim$ 1.56 ${\mu}s$), and chopped impulse with time to chopped impuse. Impulse peak value ($U_p$) and time parameters ($T_1$, $T_2$ and $T_c$) according to IEC 60060-1 were compared.