著者

中村 貴弘 早川 正士

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)

巻号頁・発行日

vol.124, no.8, pp.1012-1020, 2004-08-01

参考文献数

17

被引用文献数

1 3

---

Mesospheric optical phenomena(including sprites) are becoming an interesting subject from the standpoint of atmosphere-ionosphere coupling. This paper deals with our observation of sprites associated with winter thunderstorms in the Hokuriku area and we show the characteristics of those sprites and their parent lightning discharges. Although the scale of Japanese lightning in winter is very small as compared with the MCS (Mesoscale Convective System) for the summer continental lightning, the essential quantities (polarity, charge transfer etc.) are found to be nearly the same as those for those MCS. However, there might be required an additional factor, such as the self-organization of the lightning.

著者

中山 正人 福田 健一 荒木 拓人 恩田 和夫

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.125, no.2, pp.213-220, 2005 (Released:2005-05-01)

参考文献数

16

被引用文献数

3 2

---

The secondary batteries for the electric vehicle (EV) generate much heat during rapid charge and discharge cycles, when the EV starts quickly consuming the battery power and stops suddenly recovering the inertia energy. The generated heat increases significantly the cell temperature and causes possibly bad influences on the battery performance and the safely requirement. So we have studied the thermal behavior of nickel/metal hydride (Ni/MH) battery during rapid charge and discharge cycles, applying our previous battery thermal model, which have been confirmed to agree with the experimental results at smaller charge current than the rated current. The heat sources by the entropy change, the hydrogen occlusion and the side reaction have been referred to the published data, and the overpotential resistance and the current efficiency, the ratio of main reaction current to charge current, have been measured experimentally through the rapid charge and discharge characteristics with constant current. By using these data our thermal model for Ni/MH battery has estimated its temperature increase, which agrees well with the measured temperature rise, with the root mean square error of 1.5°C and 2.1°C for charge and discharge cycles, respectively.

著者

山口 達史 長沼 修 松岡 正憲 高野 誠治 前崎 恒司 友永 和之 中村 浩

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.121, no.8, pp.997-1004, 2001-08-01 (Released:2008-12-19)

参考文献数

6

---

Though the power supply to airplane warning light installed in transmission line tower is generally carried out by low voltage distribution line, in especially basic transmission line over 500kV with many mountainous area the inside of transmission line, there are many cases in which there is no a distribution line near, and considerable labor and cost for the power supply are needed. Then, authors developed electromagnetic induction type power source equipment which took out the electric power by using current transformer from induced current which flows in overhead earth wire. First, the power source equipment which used the penetration type for CT for the power: was developed, and the demonstration experiment for about 10 months was carried out in Tokyo Electric Power Co., Inc. Minami Niigata trunk line. As the result it was able to be verified that operating characteristic and environment-resistant characteristics of the power source equipment were good. For the purpose of applying to Tokyo Electric Power Co., Inc. Minami Iwaki trunk line in continueing, the power source equipment which used winding type for CT for the power was developed. This equipment finishes the installation construction in July, 1999, after the test in the factory is carried out, and it is carrying out the practical use in Minami Iwaki trunk line at present. In this paper, the content is reported on power source equipment applied to Minami Iwaki trunk line on EMTP analysis of the overhead earth wire current and outline of developed power source equipment and means of application to the continuous line road and operation situation in the operation and comparison examination with analytic value.

著者

村上 晃平

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.143, no.6, pp.NL6_4, 2023-06-01 (Released:2023-06-01)

著者

鈴木 守

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.129, no.4, pp.495-498, 2009-04-01 (Released:2009-04-01)

被引用文献数

1 1

---

Effective Load Dispatching Automatic Controller (ELDAC) is an EMS/SCADA system for Central Load Dispatching Office in Tokyo Electric Power Company Inc. This paper introduces the progress of development of ELDAC, which forecasts demand, sets up the most efficient generation schedule, and controls total power from generators.

著者

笠島 善憲 高坂 修一

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.102, no.2, pp.110-114, 1982-02-20 (Released:2008-12-19)

参考文献数

8

著者

小長谷 瑞木

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.142, no.4, pp.NL4_7, 2022-04-01 (Released:2022-04-01)

著者

兒玉 学 松前 光 木内 豪士 村上 直紀 平井 秀一郎

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.141, no.7, pp.541-546, 2021-07-01 (Released:2021-07-01)

参考文献数

18

被引用文献数

1 3

---

Three-dimensional large scale magnetohydrodynamic, two-phase flow, and electrochemical reaction coupling numerical simulations of alkaline water electrolysis with magnetic field were conducted to elucidate the bubble-bubble interaction and the influence of that on the overpotential. Numerical results shown that the magnetic field enhances the coalesce of bubbles and the bubble size was increased with the increase in the magnetic flux density. Moreover, the magnetic field suppressed the cell overpotential by suppressing the anode overpotential and ohmic overpotential. This is because, KOH concentration around the anode is increased by mixing of the electrolyte, and the reduction of the shielding effect by coalescing of the bubbles.

著者

竹原 有紗

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.131, no.5, pp.NL5_7, 2011-05-01 (Released:2011-05-01)

参考文献数

2

著者

安田 陽 米津 大吾 藤井 利昭

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.142, no.7, pp.347-359, 2022-07-01 (Released:2022-07-01)

参考文献数

23

---

Offshore wind power plants has gotten attention worldwide as one of key technology for future energy mix. Recent Japanese policy also promotes offshore wind power plants (OWPPS) on costal waters in the Sea of Japan. On the other hand, those areas are known by notorious winter lightning with upward lightning and large electric charge, that has caused catastrophic damages to onshore wind turbines in past. It is therefore needed stronger lightning risk management for offshore wind turbines than that for onshore. The authors proposed a lightning protection method using an independent lightning tower (ILT) and have stored experience by numerical calculations and small-scale model experiments. However, there still remain several uncertainties in the given data. This paper proposes a new method on CBA (cost-benefit analysis) regarding with the uncertainty. In the concrete, a probability density function, e.g. Gauss Function, is superimposed on quasi-quantitative data with several uncertainty given by experiment tests, which enable optimization of net benefit and objective and quantitative decision making for appropriate risk management even under uncertainty.

著者

横山 茂

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.124, no.2, pp.177-180, 2004 (Released:2004-05-01)

参考文献数

7

被引用文献数

17 23

---

The protection of wind turbine blades from lightning damages is increasingly important for an increase of wind power generation. This paper shows the manner of lightning damage of wind turbine blades and the difference between the blades made of various materials. Possible protection measures from lightning damages are shown for various types of wind turbine blades. Moreover we stress that protection of wind turbine blades from winter lightning damages is necessary for us to build wind power generators at the coast faced to the Sea of Japan.

著者

鈴木 浩

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌. B, 電力・エネルギー部門誌 = The transactions of the Institute of Electrical Engineers of Japan. B, A publication of Power and Energy Society (ISSN:03854213)

巻号頁・発行日

vol.127, no.9, pp.977-980, 2007-09-01

参考文献数

6

被引用文献数

6 6

---

By specifically designating penetrations rates of advanced meters and communication technologies, devices and systems, this paper introduces that the penetration of advanced metering is important for the future development of electric power system infrastructure. It examines the state of the technology and the economical benefits of advanced metering. One result of the survey is that advanced metering currently has a penetration of about six percent of total installed electric meters in the United States. Applications to the infrastructure differ by type of organization. Being integrated with emerging communication technologies, smart meters enable several kinds of features such as, not only automatic meter reading but also distribution management control, outage management, remote switching, etc.

著者

堤 泰行 山口 雅教

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.113, no.7, pp.776-784, 1993-07-20 (Released:2008-12-19)

参考文献数

3

---

Experimental studies and analytic theories are presented on a steam share between exhausted air and exhausted fuel from phosphoric acid fuel cells.The steam share depends on a fiow rate of air and fuel. The share characteristics can be explained by a steam transport mechanism in which steam carried with air and fuel are combined with steam permeated through an electrolyte layer.The mechanism is applied to the published analytic theory for fuel cell performance. The revised theory can calculate steam share between air and fuel at each part of a cell. The calculated steam share between exhausted air and exhausted fuel at typical operating conditions of a fuel cell plant is presented.A simplified method for calculating steam share is developed and shown to give almost the same results with the detailed theory for fuel cell performance.

著者

西崎 康 入江 寛 横山 明彦 多田 泰之

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.129, no.1, pp.50-56, 2009-01-01 (Released:2009-01-01)

参考文献数

12

被引用文献数

15 26

---

Considering interconnection of a large-capacity of wind power generation to the utility grid, it is of great concern that its output power fluctuation has adverse influences, e.g. frequency fluctuation. There have so far been some research works on installation of battery energy storage systems (BESS), as a solution of these problems. However, owing to very high cost of the BESS, its capacity should be as small as possible. In this paper, not only the installation of the BESS as one of measures of suppressing the frequency fluctuation caused by wind power generation, but also blade pitch angle control for blunting the output power of wind turbine generators (WTGs) is also considered. This paper proposes a coordinated control method of the BESS and the blade pitch angle, and evaluates reduction of the capacity of the BESS and the power generation loss caused by blunting the output power which should be originally generated by WTGs.

著者

鈴木 郁海 根岸 信太郎 池上 貴志

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.140, no.6, pp.521-530, 2020-06-01 (Released:2020-06-01)

参考文献数

18

---

It is expected to promote the introduction of renewable energy (RE), such as photovoltaic (PV) and wind power (WP), from the view points of carbon dioxide reduction and diversification of energy sources. However, as the introduction of RE into the conventional power grid, output curtailment of RE will increase due to supply and demand balance constraints. In this study, we have developed a model and data which enable long-term power supply and demand analysis based on some scenarios. Using this model and data, we analyzed the transition of the amount of RE generation and the amount of RE curtailment per installed capacity. As a result, the change in the facility utilization rate of PV and WP is clarified quantitatively based on the influence of RE curtailment. The amount of PV curtailment was significantly increased in Kyushu and Tohoku area, where RE is particularly widespread. The results of this paper can be used to evaluate how and when it is necessary to take measures such as the introduction of storage batteries.

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.140, no.12, pp.NL12_1, 2020

著者

藪田 哲郎 松本 俊明 根岸 幸康

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.100, no.3, pp.137-144, 1980-03-20 (Released:2008-12-19)

参考文献数

5

著者

原田 信弘 佐々木 徹 藤野 貴康

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.135, no.8, pp.NL8_5, 2015-08-01 (Released:2015-08-01)

著者

根岸 信太郎 池上 貴志

出版者

一般社団法人 電気学会

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.139, no.12, pp.757-766, 2019-12-01 (Released:2019-12-01)

参考文献数

20

被引用文献数

6

---

In this paper, a new method of water pumping scheduling in a water distribution system with providing balancing reserves to power systems is proposed. This method enables to obtain a daily schedule of pumping water and balancing reserves, which is based on prices of electric energy and balancing reserves, hourly water demand profile, and properties between water flow quantity and consumption electricity of water pumps. The proposed method consists of an optimization model which is formulated by Mixed Integer Linear Programming (MILP). The constraints about the fluctuation of the volume of water in a reservoir, which is occurred by providing the balancing reserves, is added into the proposed model. Adding these constraints, stable water distribution is enabled even when the balancing reserves are activated. To verify the validity of the proposed method, simulations of water pumping scheduling in some cases were done. As a result, net operational cost was decreased when water pumps provided the balancing reserves. Moreover, the operational feasibility of providing the balancing reserve from water pumps is clarified.

著者

乾 昭文 小林 恒夫 寺西 常治 池田 正己

出版者

The Institute of Electrical Engineers of Japan

雑誌

電気学会論文誌B(電力・エネルギー部門誌) (ISSN:03854213)

巻号頁・発行日

vol.118, no.5, pp.563-572, 1998-05-01 (Released:2008-12-19)

参考文献数

21

---

In this paper, the static electrification phenomena on the dielectric materials by SF6 gas flow were investigated. When pure SF6 gas flows on the dielectric materials at high speed up to 25m/sec, no electrification was observed on the dielectric material surfaces. In case of the flow contained dielectric microscopic particles colliding with dielectric materials, it is confirmed that the SF6 gas flow of speeds above 5m/sec causes the electrification on the dielectric surfaces. The faster the SF6 gas flow, the higher the surface potential of the dielectric material is. Such phenomena of static electrification of SF6 gas contaminated with microscopic dielectric particles were explained to be caused by the friction between the dielectric materials and the dielectric microscopic particles in SF6. The polarity and the magnitude of the surface potential of the material, after flowing the SF6 gas contaminated with dielectric particles, are confirmed by the result of a general friction experiment of the two dielectric materials. It is considered that a well-controlled gas insulated transformer not contaminated with microscopic dielectric particles in SF6 can not generate electrification phenomena.