• Title/Summary/Keyword: Lee Young-choon

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Power System Stability Analysis Considering Motor Loads (모터부하를 고려한 ON-LINE 안정도 해석)

  • Park, Ji-Ho;Baek, Young-Sik;Lee, Hee-Choon
    • Proceedings of the KIEE Conference
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    • 2000.07a
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    • pp.316-318
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    • 2000
  • In this paper. we have simulated the transient stability of power system with motor loads. In study of power system stability, modelling of motors is required for the system with large concentrations of motors. Therefore the dynamics attributable to motors are usually the most significant aspects of dynamics characteristics of system loads. A synchronous motor is modelled as a dynamic load. We investigate the effect of synchronous motors of Kwang Yang network with three phase fault.

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Solubilization of poorly water-soluble drugs using solid dispersions

  • Kim, Tae-Wan;Choi, Choon-Young;Cao, Qing-Ri;Lee, Beom-Jin
    • Proceedings of the PSK Conference
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    • 2002.10a
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    • pp.412.2-413
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    • 2002
  • Purpose. To prepare polymer based physical mixtures or solid dispersions containing solubilizing compositions using a spray-dryer. Methods. Lovastatin.simvastatin.aceclofenac and cisapride were selected as poorly water-soluble drugs. Dextrin. poly(vinylalcohol). poly(vinylpyrrolidone)and polyethylene glycol were chosen as solubilizing carriers for solid dispersions. The solid dispersions containing solubilizing compositions without drug were prepared without using organic solvents or tedious changes of formulation compositions. (omitted)

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Substation Power Quality Test of Hanvit 350 running (한국형 고속열차 주행시 전철변전소 전력품질 시험)

  • Lee, Tae-Hyung;Park, Choon-Soo;Im, Young-Chan;Choi, Seong-Hoon
    • Proceedings of the KSR Conference
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    • 2007.11a
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    • pp.1479-1481
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    • 2007
  • It is important to evaluate the power quality at a substation when a test train is running. Especially, the Korea Electric Power Company(KEPCO) restrict the power quality generated from the electrical train within limited value. So, this paper represents the results of the power quality test when Hanvit 350 is running at the KTX high speed line and the assessment.

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