電磁誘導影響下にある地中ケーブル送電線の線路定数測定手法

カテゴリ: 論文誌(論文単位)

グループ名: 【B】電力・エネルギー部門

発行日: 2019/09/01

タイトル(英語): A Method for Measuring Underground Cable Constants under Electromagnetic Induction Effects

著者名: 野田　琢（（一財）電力中央研究所 エネルギーイノベーション創発センター 解析フロンティアグループ），田所　兼（（一財）電力中央研究所 エネルギーイノベーション創発センター 解析フロンティアグループ），森　亮太（（一財）電力中央研究所 エネルギーイノベーション創発センター 解析フロンティアグループ），仲間　博文（沖縄電力（株）送配電本部 電力流通部 工務グループ），金子　敏章（沖縄電力（株）送配電本部 電力流通部 工務グループ），平良　祐（沖縄電力（株）送配電本部 電力流通部 工務グループ）

著者名(英語): Taku Noda (Simulation Frontier Group, Energy Innovation Center, CRIEPI), Tomo Tadokoro (Simulation Frontier Group, Energy Innovation Center, CRIEPI), Ryota Mori (Simulation Frontier Group, Energy Innovation Center, CRIEPI), Hirofumi Nakama (Power System Planning & Survey G., T&D Div., Power System Management Dept., The Okinawa Electric Power Company), Toshiaki Kaneko (Power System Planning & Survey G., T&D Div., Power System Management Dept., The Okinawa Electric Power Company), Tasuku Taira (Power System Planning & Survey G., T&D Div., Power System Management Dept., The Okinawa Electric Power Company)

キーワード: ケーブル定数，電磁誘導，実測，正相・零相インピーダンス，地中ケーブル送電線　　cable constants，electromagnetic induction，field measurement，positive- and zero-sequence impedances，and underground cable transmission line

要約(英語): At the time of the commissioning of an underground cable transmission line, it is a common practice to perform measurement of its electrical constants. In such measurement performed by a cable manufacturer, the following straightforward method is used for each circuit of the cable line. A three-phase voltage source is used to apply a balanced three-phase voltage at the power frequency to one end of the cable circuit with the other end short-circuited, and the positive-sequence impedance is obtained by the measured voltage and current. To obtain the zero-sequence impedance, a single-phase voltage at the power frequency is applied to the bonded three-phases of one end of the cable circuit, to the ground, with all phases at the other end grounded. If there is no parallel cable circuit in service, this method gives an accurate result. However, if there are one or more parallel cable circuits in service, the cable circuit under measurement gets electromagnetic induction from the magnetic flux generated by the currents on the parallel circuits. This induction generates superimposed currents and thus makes the measured result inaccurate. Considering this point, a method to measure a voltage and a current at a frequency different from the power frequency so as to separate the power-frequency current component generated by the electromagnetic induction and obtain the impedance value at that frequency is proposed in this paper. Using impedance values measured at two frequencies different from the power frequency, the power-frequency impedance value is then obtained by linear approximation. The proposed method is applied to obtain the impedances of a 132-kV underground cable line, and a reasonable result is obtained.

本誌: 電気学会論文誌B（電力・エネルギー部門誌） Vol.139 No.9 （2019）

本誌掲載ページ: 533-542 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejpes/139/9/139_533/_article/-char/ja/