Proposal of Normalised Two Exponential Functions for Impulse Voltage Parameters Calculation

カテゴリ: 部門大会

論文No: 242

グループ名: 【B】令和5年電気学会電力・エネルギー部門大会

発行日: 2023/08/23

タイトル(英語): Proposal of Normalised Two Exponential Functions for Impulse Voltage Parameters Calculation

著者名: 清水博幸（日本工業大学），里周二（宇都宮大学），西村誠介（横浜国立大学）

著者名(英語): Hiroyuki Shimizu (Nippon Institute of Technology), Shuji Sato (Utsunomiya University), Seisuke Nishimura (Yokohama National University)

キーワード: 二指数関数|雷インパルス|開閉インパルス|IEC 60060-1|the sum of two exponential functions|lightning impulse|swtching impulse|IEC 60060-1

要約(英語): Lightning impulse voltage (LI) measuring system’s (i.e. voltage divider and connected devices) performance is also evaluated by the numerical convolution of the sum of two exponential functions (S2X) and system’s unit step response. This appraisal is defined in IEC 60060-1 ed.3:20101). In the convolution calculation, one has to give precise values to a and b of S2X, A(exp(-at)-exp(-bt)) , for the specific waveform of T1/T2 impulse.In the forthcoming IEC 60060-1 ed.4 to be published within a few years, it has already been concluded that the notation of switching impulse voltage (SI) is not written by Tp/t50 impulse but by the same definition as T1/T2 impulse used in LI. This suggests that there would be requirements in SI to compute a and b values from the LI-style notation T1/T2. In the similar attempt, authors have proposed approximation3). of a and b values for a given T1/T2. Authors now wish to propose a novel evaluation procedure in this paper.

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