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新高考(英语进阶) 2014年第1期 26-28页

作者：冯光君

jeju island is a volcanic island,dominated by Halla(汉拿)Mountain:a volcano 1,950 meters high and the highest mountain in South *** island measures approximately 73 kilometers across east to west,and 41 kilometers from north to *** island was created entirely from volcanic eruptions approximately 2 million years ago,during the time period extending from the Tertiary to the beginning of the Quaternary period,and consists chiefly of basalt and *** eruptions took place in the Cenozoic era.

关键词：济州岛火山岩裂缝 jeju island 新生代

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A FOSSIL FEATHER FROM THE LATE PLEISTOCENE DEPOSITS OF jeju island, KOREA

A FOSSIL FEATHER FROM THE LATE PLEISTOCENE DEPOSITS OF JEJU ...

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第二届国际古生物学大会

作者： Jeong Yul KIM Kyung Soo KIM Sam Hyang KIM Sung Me KIM Dept.of Earth Sci.Edu. Korea National Univ.of Edu.Korea Chungbuk Science High School Korea

A fossil feather found from the Late Pleistocene sediments of jeju island, Korea is described. The sediments were deposited in a shoreline environment and have yielded numerous footprints of diverse birds and mammals including hominids. A fossil feather well preserved as a thin white film on the light gray mudstone is a part of a vaned flight feather. Although the specimen is small in size, 10.3 mm long and 9.0 nun wide,

关键词： fossil feather Late Pleistocene jeju island Korea

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Dynamic Modeling of DFIG Wind Farms and HVDC for the Power System in jeju island

Dynamic Modeling of DFIG Wind Farms and HVDC for the Power S...

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2011 International Conference on Advanced Power System Automation and Protection(APAP 2011)

作者： Soon-Ryul Nam Sang-Hee Kang Hae-Kon Nam Joon-Ho Choi Myongji University Yongin South Korea Chonnam National University Gwangju South Korea

In jeju island, which is the largest island in South Korea, main portion of the required electric power is provided from the mainland through two HVDC lines. Since jeju HVDC is operated on frequency control mode and it covers entire power variations in jeju island, it has a most significant impact on the power system in jeju island. The large-scale wind generation also could have significant impacts on the power system in jeju island. This is because the total capacity of wind power is considerable large compared to the load in jeju island and it can threaten the stable operation of the power system. In this paper, dynamic modeling of wind farms and jeju HVDC is developed using PSS/E. Wind farms are composed of doubly fed induction generators （DFIGs）. Model writing technique is used to develop user-defined models for controlling HVDC frequency and imposing maximum penetration limit. The simulation results indicate the effectiveness of the dynamic modeling for stability studies of the power system in jeju island.

关键词： Doubly fed induction generator Dynamic modeling HVDC jeju island Model writing PSSE Wind farm

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