EMTP Numerical Instability of VFT Simulation on Overhead Cables due to the Earth-Return Impedance and Admittance

カテゴリ: 研究会(論文単位)

論文No: HV20005

グループ名: 【B】電力・エネルギー部門 高電圧研究会

発行日: 2020/01/23

タイトル(英語): EMTP Numerical Instability of VFT Simulation on Overhead Cables due to the Earth-Return Impedance and Admittance

著者名: Xue Haoyan(China Power),Ametani Akihiro(University of Manitoba),Yamamoto Kazuo(Chubu University)

著者名(英語): Haoyan Xue(China Power),Akihiro Ametani(University of Manitoba),Kazuo Yamamoto(Chubu University)

キーワード: numerical instability|VFT|EMTP|overhead cable|mode transition|earth-return impedance / admittance|numerical instability|VFT|EMTP|overhead cable|mode transition|earth-return impedance / admittance

要約(日本語): This paper shows a numerical instability in EMTP simulation of very-fast transients on an overhead cable. The instability is caused by Carson / Pollaczek’s earth-return impedance and space admittance implemented into EMTPs, and is associated with “mode transition” from a low-frequency earth-return wave (TEM mode of wave propagation) to a high-frequency surface wave (TM mode of wave propagation). The very high-frequency components involved in the VFT is a cause of the instability, because Carson / Pollaczek’s impedance cannot deal with the high frequency surface wave as is well-known. The instability is avoided by adopting an accurate impedance and admittance formulas.

要約(英語): This paper shows a numerical instability in EMTP simulation of very-fast transients on an overhead cable. The instability is caused by Carson / Pollaczek’s earth-return impedance and space admittance implemented into EMTPs, and is associated with “mode transition” from a low-frequency earth-return wave (TEM mode of wave propagation) to a high-frequency surface wave (TM mode of wave propagation). The very high-frequency components involved in the VFT is a cause of the instability, because Carson / Pollaczek’s impedance cannot deal with the high frequency surface wave as is well-known. The instability is avoided by adopting an accurate impedance and admittance formulas.

原稿種別: 英語

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