EMT Simulations of Very Fast Transients in a 500 kV GIS

カテゴリ: 研究会(論文単位)

論文No: HV22016

グループ名: 【B】電力・エネルギー部門 高電圧研究会

発行日: 2022/01/17

タイトル(英語): EMT Simulations of Very Fast Transients in a 500 kV GIS

著者名: Xue Haoyan (State Grid Corporation of China),Mahseredjian Jean (Polytechnique Montreal),Ametani Akihiro (Doshisha University/Manitoba Hydro International/Chubu University)

著者名(英語): Haoyan Xue(State Grid Corporation of China),Jean Mahseredjian(Polytechnique Montreal),Akihiro Ametani(Doshisha University/Manitoba Hydro International/Chubu University)

キーワード: ＥＭＴ　ｓｉｍｕｌａｔｉｏｎ|ＶＦＴ|５００ｋＶ　ＧＩＳ|ｐａｒａｍｅｔｒｉｃ　ａｎａｌｙｓｉｓ|EMT simulation|VFT|500kV GIS|parametric analysis

要約(日本語): This paper investigates VFTs based on EMT simulation results by a frequency-dependent (FD) line model with an accurate earth-return impedance and admittance. The VFT oscillating frequency is, in principle, proportional to the total length of buses, DSs an

要約(英語): This paper investigates VFTs based on EMT simulation results by a frequency-dependent (FD) line model with an accurate earth-return impedance and admittance. The VFT oscillating frequency is, in principle, proportional to the total length of buses, DSs and CBs in the GIS. However, the frequency is decreased easily less than a half by stray capacitances of transformers and bushings in the GIS, because those are far greater than the bus capacitance. Although the pipe grounding reduces the pipe voltage significantly as easily estimated, the core voltage tends to increase as the grounding resistance becomes smaller. The grounding causes only minor influence on the oscillating frequency. The position of an operating dis-connector causes a very significant effect on the VFT over-voltages and oscillating frequency. The distance to the open-circuited remote end from the DS is short, the overvoltage and frequency become very high. The effect of spacers is similar to that of a stray capacitance, but the effect is less noticeable for the smaller capacitance of the spacers. The effect charging conditions is less noticeable than the effect of an operating DS._x000D_ The analytical formulas explained in this chapter show a satisfactory agreement with the EMT results._x000D_

本誌: 2022年1月20日-2022年1月21日高電圧研究会

本誌掲載ページ: 89-94 p

原稿種別: 英語

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