| Title |
Optimum Design Methodology of the Damped Oscillatory Impulse Current Generator Considering a Nonlinear Load |
| Authors |
장석훈(Chang, Sug-Hun) ; 이재복(Lee, Jae-Bok) ; Shenderey, S.V.(Shenderey, S.V.) ; 명성호(Myung, Sung-Ho) ; 조연규(Cho, Yuen-Gue) |
| Keywords |
Nonlinear Parameter Estimation ; Lightning ; Impulse Current Generator ; SPD |
| Abstract |
This paper presents a design parameter calculation methodology and its realization to construction for the damped oscillatory impulse current generator(ICG) modelled as damping factor α. Matlab internal functions, "fzero" and "polyfit" are applied to find a which are solutions of second order nonlinear equation related with three wave parameters T_{1},T_{2} and I_{os}. The calculation results for standard impulse current waveforms such as 4/10μs, 8/20μs and 30/80μs show very good accuracy and this results make it possible to extend to generalization in the design of damped oscillatory lCG with any capacitor. 8/20μs ICG based on the calculated design circuit parameters is fabricated in consideration of the nonlinear load(MOV) variation. Comparisons of the tested waveforms with the designed estimation show error within 10% for the waveform tolerance recommended in IEC 60060-1 and IEEE std. C62.45. |