著者

金城 達人 千住 智信 上里 勝実 藤田 秀紀

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.8, pp.1059-1066, 2004 (Released:2004-11-01)

参考文献数

18

被引用文献数

5 8

---

The increased renewable energy utilization, especially photovoltaic panels using solar energy or wind turbine generators (WTGs) using wind energy, has been expected in recent years from view point of CO2 gas emission reduction and environmental conservation. However, the generated power is always fluctuating because the WTGs are driven by fluctuating wind. Therefore, an energy storage system should be installed to compensate these fluctuating elements. The energy capacitor system (ECS) which combined the electric double-layer capacitor (EDLC) and the electronic circuits are now under development. In this paper, control system configuration for active and reactive output power simultaneous control and the bi-directional inverter using current source EDLC are proposed. Moreover, we discusse control methods required in generating-power leveling for WTGs, and show the effectiveness of the proposed system through simulations.

著者

千住 智信 金城 達人 上里 勝実 藤田 秀紀

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.123, no.12, pp.1522-1530, 2003-12-01

被引用文献数

10 12

---

In recent year, power generation from renewable energy sources is comming up. Particularly, wind power generation is attractive because of it's advantages like, pollution free, no fuel cost, abundantly available in nature etc. However, the generated power is fluctuating and it mainly depends on the wind speed. These fluctuations will arise the bus voltage fluctuations and will cause power oscillations. A superconducting magnetic energy storage (SMES) unit based on a self-commutated inverter using Gate-turn-off (GTO) thyristor is capable of controlling both the active and reactive power simultaneously and quickly. <BR>In this paper, control system conguration for active and ractive output power control of the series and parallel compensator which applied SMES is presented. Furthermore, this paper also describes the effectiveness of generating power leveling of transmission line and compensation of the generator's terminal bus voltage instantaneous sag. It is show through simulations, that the controlling sequence of charging and discharging of the SMES coil effectively damps out the generator's terminal bus voltage fluctuations and transmission line power oscillations.

著者

佐藤 義久 吉田 尚嗣 田辺 幸典 藤田 秀紀

出版者

一般社団法人日本機械学会

雑誌

日本機械学會論文集. B編 (ISSN:03875016)

巻号頁・発行日

vol.72, no.717, pp.1335-1341, 2006-05-25

被引用文献数

2

---

It is necessary to use the low temperature thermal energy around 100 degress C from a viewpoint of global warming prevention. Even if a shape memory alloy is bent in normal temperature, when it is heated, it has the character which returns to the original straight form. Using this character of a shape memory alloy, unused thermal energy will be able to transform into rotation energy. A shape memory alloy belt is hung on a high temperature wheel and a low-temperature wheel. On this simple pulley type shape memory alloy engine, a shape memory alloy belt is heated with a high temperature wheel, it occurs a moment when returning to the original straight form, the moment kicks a high temperature wheel by the principle of action reaction, and torque is generated. We solved this torque generating mechanism. We proposed the theory which can design the output power of the simple pulley type shape memory alloy engine. Furthermore, the validity of this theory was verified by experiment.