• Title/Summary/Keyword: Ji-u Hwang

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The Field Test of Power Performance Measurement for U50 Wind Turbine (U50 풍력발전기 출력성능 실증연구)

  • Hwang, Jin-Su;Jang, Seong-Tae;Kim, Dae-Hyun;Bang, Jo-Hyug;Ryu, Ji-Yune
    • 한국신재생에너지학회:학술대회논문집
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    • 2007.11a
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    • pp.372-375
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    • 2007

  • 750kW gearless type wind turbine, named U50, is developed by UNISON in Korea. The newly developed wind turbine should be evaluated the power curve and the estimated annual energy production by following international standard to verify the power performance characteristics. This paper shows the test and evaluation procedure according to IEC 61400-12-1 which specifies a procedure of measuring the power performance characteristics of a single wind turbine and applies to the testing of wind turbines of all types and sized connected to the electrical power network. And this paper also shows the power performance characteristics for U50 wind turbine which is determined in accordance with IEC regulation.

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Study of Power Quality Measurement U57 Windturbine (U57 풍력발전기 전력품질 실증연구)

  • Lee, Byung-Chul;Park, Hee-Chul;Hwang, Jin-Su;Ryu, Ji-June
    • 한국신재생에너지학회:학술대회논문집
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    • 2008.10a
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    • pp.310-314
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    • 2008

  • The exploitation of the wind energy resource is a rapidly growing area world-wide. The number of installed units is continuously increasing, and it is important to respect and to deal with the impact of wind turbine. This paper addresses the power quality characteristics of U57 Wind Turbine. 750kW gearless type wind turbine for low wind speed, named U57, is developed by UNISON. The power quality measurement system consists of measuring WTG output current, line-to line voltage and wind speed signal. With using measured data, power quality measurement is evaluated about maximum power, reactive power, voltage fluctuation, harmonics according to IEC 61400-21.

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Implementation of Biosignal Mornitoring System for u-Health (유헬스를 위한 생체신호 모니터링 시스템의 구현)

  • Kim, Kyung Ho;Park, Ji Ho;Park, Young Sik;Hwang, Yu Min;Kim, Jin Young
    • Journal of Satellite, Information and Communications
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    • v.9 no.2
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    • pp.80-84
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    • 2014

  • As an integrated technology with IT and biomedical sciences, U-health offers various healthcare services without time and space limit. In order to make a proper diagnosis, doctors need two key technologies: biosignal measurement and high reliability communication technologies. In this paper, we introduce an implementation process of a bio signal system with using an electrocardiography(ECG) sensor, video, global positioning system(GPS), communication module and micro controller unit(MCU).

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