著者

甲斐 隆章 舟橋 俊久

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.112, no.2, pp.138-146, 1992

被引用文献数

1

---

To analyze multi faults on a power line, we need to perform many complexed calculations. So, in many cases, we used to do them, using computers, in the actual phase domain. But it is difficult to expose the property and/or the physical meaning of the calculated results, because the computer method is based on many complexed numerical calculations.<br>This paper represents a new analytical method for short circuit studies, which can deal with crosscountry multi fault in double-circuit transmission line with zero-sequence mutual coupling. This method is based on the well known &ldquo;two-component network theory&rdquo; for a balanced three phase double-circuit. Procedure steps are; (1) Represent the network seen from the faulted points, with symmetrical component impedance. (2) Construct the symmetrical equivalent circuits for faults, with imaginary phase shifting transformers. (3) Combine these equivalents with each other, and erase the symmetrical voltages at faulted points, because the phase voltages at faulted points are known. (4) Calculate the currents at the faulted points, by solving the simultaneous linear equations.<br>We applied this method to an investigation of a distance relay's &ldquo; underreach&rdquo; phenomena in case of cross-country multi fault occured on a double-circuit transmission line. Effects of line constants to this phenomena have been well understood.

著者

中岡 睦雄 羽根田 博正 丸橋 徹 西村 正太郎

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.99, no.8, pp.557, 1979

著者

木下 裕道

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.98, no.5, pp.417-424, 1978-05-20 (Released:2008-12-19)

参考文献数

8

著者

村井 由宏 浅野 勝宏 常広 譲

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.101, no.6, pp.315-322, 1981-06-20 (Released:2008-12-19)

参考文献数

4

被引用文献数

1 1

著者

榊原 建樹 吉井 孝次 鬼頭 幸生

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.103, no.6, pp.387-394, 1983-06-20 (Released:2008-12-19)

参考文献数

6

著者

多田隈 進 田村 吉章 田中 茂

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.98, no.1, pp.17-24, 1978-01-20 (Released:2008-12-19)

参考文献数

12

著者

水野 勝教 林 伸久 後藤 泰之 雪田 和人 一柳 勝宏 横水 康伸 松村 年郎

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.120, no.5, pp.665-671, 2000

被引用文献数

3

---

This paper describes an application of a neural network for estimating the ground rainfall from radar echo data. A neural network system for this purpose is developed through a case study on a dam for hydro-power plant located the upper district of the Ooi River in Central Japan. We use the neural network comprised of three layers; an input layer, a hidden layer and output layer. The input data to the neural network are any numebr of radar echo amount observed in each radar mesh and x-y-z coordinates showing its location.<br> The four types of neural networks with different number of input units are proposed and discussed the relative importance of the number of input data. It is found that the estimating system using the most simple neural network yields good results for rainfall distribution.

著者

曽根 悟 阿部 茂

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.92, no.3, pp.195-204, 1972-03-20 (Released:2008-12-19)

参考文献数

6

著者

藤林 宏一 村崎 憲雄 松井 満

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.105, no.10, pp.867-872, 1985-10-20 (Released:2008-12-19)

参考文献数

6

著者

東盛 良夫

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.113, no.2, pp.177-184, 1993

被引用文献数

1

---

Electric power is in great demand, and it is transmitted to distant places for consumers with high efficiency, where various insulators are being used for power transmission and distribution line for insulation.<br>Insulators contaminated by salt particles have been causes for flashovers on the surface under high voltage in humid climate and light rain. Rapid salt contamination of the insulator surface by typhoons has been investigated on the campus of University of the Ryukyus for several years.<br>The results obtained from the exposure tests are:<br>(1) Accumulative contamination of the insulator surface occurred always on the bottom surface of the insulators, and on the upper surface of insulators during the period without rainfall.<br>(2) The extent of contamination of the pin-type insulators with the saltproof dishes was 1/2_??_1/6 in comparison to that of pin-type insulators without ones.<br>(3) The salt contamination of the insulator surfaces is almost always influenced by wind speed and precipitation.<br>(4) Flashover voltage of salt contminated insulators by typhoons drops to approximately 1/10 of that for clean and dry insulators.

著者

中村 政俊 籏崎 裕章

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.97, no.7, pp.397-404, 1977-07-20 (Released:2008-12-19)

参考文献数

8

著者

荒木 智勇 林 孜 黒柳 行央

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.110, no.7, pp.591-597, 1990

---

We have been developing GILs for use as large capacity transmission lines since 1969. In 1979, GIL was applied to a 154kV in-yard link line of The Tokyo Electric Power Co., Inc. for the first time in Japan. In 1980, we began the development of a compact GIL to improve cost efficiency and applicability, it was applied to a 500kV incoming line of The Tokyo Electric Power Co., Inc. in 1985. This project planned as 275kV getaway lines connected to overhead line (810mm²&times;4) in Shin Noda Substation of The Tokyo Electric Co., Inc. The 8, 000A class 275kV GILs are the largest current underground transmission lines in the world. The paper describes the design, installation and tests of the project.

著者

岩尾 徹

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B

巻号頁・発行日

vol.136, no.9, pp.728-728, 2016

被引用文献数

2

---

<p>大電流高エネルギー技術は,電力技術,核融合技術,レーザやビーム発生器などのパルスパワー技術,放電加工やレールガンのような電磁力応用技術,強磁界発生技術など,エネルギー技術の分野から最先端技術の領域に至るまで,幅広い範囲にわたって応用されており,かつ応用分野の拡大</p>

著者

藁科 茂 小島 雪夫 中村 静香 松本 啓之亮

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.109, no.2, pp.49-56, 1989

著者

三谷 康範 辻 毅一郎 村上 吉繁

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.107, no.10, pp.485-492, 1987-10-20 (Released:2008-12-19)

参考文献数

8

著者

横塚 勉

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.98, no.2, pp.169-176, 1978-02-20 (Released:2008-12-19)

参考文献数

9

著者

大城 諒士 我那覇 和奎 原田 繁実 金子 英治

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.136, no.2, pp.184-191, 2016

被引用文献数

3

---

In EMTP, it is very hard to simulate a vertically arranged cable, since its surge impedance gradually changes with the distance from the ground to a top point. In the past, some researches about surge impedances and responses of vertical conductor (for example transmission tower, concrete pole and so on.) have been carried out, these researches are being continued now. However, there is no model of vertical co-axial cable in EMTP. In order to analyze surge voltage arisen on the electrical system, approach of method for treating this model in EMTP is required. In this paper, experiments of surge impedance and response on vertical cable, method of treating for vertical co-axial cable in EMTP and accuracy confirmed as compared result of this model with analysis result of VSTL Rev. (Virtual Surge Test Lab. rev. ) which is constructed under FDTD (Finite Difference Time Domain) method, are reported.

著者

浅岡 由伸 本山 英器 松原 広治 杉本 仁志

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.125, no.10, pp.979-987, 2005

被引用文献数

1 3

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Grounding resistance is one of the important parameters in the lightning-protection design of electric power systems. The grounding resistance of electrode decreases as large currents are injected to the electrode by electric discharges in soil. This characteristic is not considered in lightning protection design. Therefore, the design level is kept on the exceeding level in actual phenomena. From viewpoint of the rational lightning protection design for the electric power systems, this characteristic should be considered in practical design. In this study, experiments were conducted using rod electrodes, and the physical phenomena of the electrical discharge in soil were considered by assuming a certain electrical discharge model in soil. Based on these results, a grounding resistance large-current characteristic analysis model that could be easily used in EMTP was developed.

著者

奥田 宏史 藤本 登 吉崎 政宣

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.98, no.8, pp.679-686, 1978-08-20 (Released:2008-12-19)

参考文献数

9

被引用文献数

2 2

著者

小西 義則 佐藤 学

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B (ISSN:03854213)

巻号頁・発行日

vol.133, no.5, pp.NL5_2-NL5_2, 2013