| Title |
Equivalent Circuit Model for the Estimation of Secondary Cable Voltage Fluctuation Considering Transient Potentaial in Grounding Grid |
| Authors |
최경륜(Gyeong Ryun Choi) ; 김광호(Kwangho Kim) ; 박민혜(Park Min Hae) ; 심선주(Seonju Shim) ; 최종기(Jong-Kee Choi) ; 김용상(Yong-Sang Kim) ; 나완수(Wansoo Nah) |
| DOI |
https://doi.org/10.5370/KIEE.2022.71.10.1383 |
| Keywords |
Equivalent Circuit Model; Grounding Grid; Potential Fluctuations; Secondary Cable; Surge |
| Abstract |
In this paper, an equivalent circuit model of the surge transmission path was proposed to analyze the effect of potential fluctuations in the substation grounding grid on secondary cables. For the surge hitting the grounding grid, the surge waveform defined in the international standard surge immunity test standard IEC 61000-4-5 was referred to. Based on the FFT result of the surge waveform, the effective frequency band was set up to 20 MHz. In addition, an equivalent circuit model for each model was produced by dividing the structure of the substation into four parts, and the individual models were verified through comparison of the 3D EM simulation. Finally, the equivalent model of the complete system were verified by comparing the results from 3D simulation in the time domain, and the voltage induced at both ends of the secondary cable when the grounding network was struck was compared. |