Reduction of the Induction Field on Overhead Transmission Lines Caused by Resonance with an MF Broadcast Wave by Using the Method of Selecting Grounding Points(Electromagnetic Compatibility(EMC))
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概要
- 論文の詳細を見る
A new method is proposed in this paper for reducing the MF broadcast wave induction field on overhead power transmission lines during maintenance and inspection work of the line. Power transmission usually has to be stopped in the circuit being worked on, and the conductors are grounded to the steel towers at both ends of the worked section of the line to prevent electric shocks that may be caused by the commercial frequency induction field induced by the current running through the transmission circuit. In these situations, a very strong RF induction field is sometimes observed in the circuit undergoing maintenance work when a high power MF broadcast antenna is located near the transmission line. It has been found [1] that this strong RF induction is caused by the resonance of one or two wavelengths in the closed loop circuit consisting of the conductors and the steel towers (including the ground), and that the strong induction due to the MF field can be avoided by inserting induction coils of appropriate values between the conductors and the steel towers. In this paper, a simple alternative method for reducing the MF induction field by carefully selecting appropriate towers for the grounding is proposed. In this method, the two towers to be grounded are chosen from among the four towers adjacent to the towers that are being worked on. By selecting the correct two towers to be grounded we can ensure that the resonance frequency does not correspond with the frequency of the broadcast wave, and we demonstrate that the RF induction field can be considerably reduced.
- 社団法人電子情報通信学会の論文
- 2003-09-01
著者
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Sawaya K
Tohoku Univ. Sendai‐shi Jpn
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Sawaya Kunio
Dept. Of Electrical And Communication Engineering School Of Engineering Tohoku University
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Adachi Saburo
Dept. Of Electrical And Communication Engineering School Of Engineering Tohoku University
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SASAMORI Takayuki
Dept. of Electronics and Information Systems, Akita Prefectural University
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TOBANA Teruo
Dept. of Electronics and Information Systems, Akita Prefectural University
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ABE Kohshi
Dept. of Electronics and Information Systems, Akita Prefectural University
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ARITA Kohji
Tokyo Electric Power Co.
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Abe Kohshi
Department Of Electronics And Information Systems Akita Prefectural University
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Tobana Teruo
Department Of Electronics And Information Systems Akita Prefectural University
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SASAMORI Takayuki
Department of Electronics and Information Systems, Akita Prefectural University
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Sasamori Takayuki
Department Of Electronics And Information Systems Akita Prefectural University
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