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이재득(Jaedeuk Lee),천성관(Sunggwan Cheon),이동기(Donggi Lee),최해창(Haechang Choi),이기욱(Kiwook Lee) 한국해양환경·에너지학회 2021 한국해양환경공학회 학술대회논문집 Vol.2021 No.10
본 연구에서는 1MW급 조류발전기에 적용될 제어시스템과 전력변환장치에 대한 설계와 분석을 수행하였다. 1MW급 조류발전시스템이 울돌목 해역의 조류발전 실해역 시험장에 설치되는 조건으로 저압형 AC 690V 전력변환장치를 설계하였으며 현재 제작 중에 있다. 제어시스템은 직접구동형 영구자석형 발전기, 피치시스템, 나셀시스템, HVAC, 빌지(bilge) 등으로 구성된 시스템의 제어요소와 이들에 대한 제어방법에 대하여 분석하였다. In this study, we was studied on the control and power conversion system(PCS). It is applied to the 1MW tidal power generation system. A AC 690V PCS is being designed and manufactured as a condition that a tidal current generator be installed at sea test bed for tidal current power in the Uldolmok sea area. The control system analyzed the control elements and control methods of the system consisting of direct driving PMSG(Permanent Magnet Synchronous Generator), pitch systems, nacelle systems, HVACs, bilge, etc.
Clonidine 경구 전투약이 기관내 삽관 후 호흡기계 역학의 변화에 미치는 효과
전희정,박평환,석은하,황규삼,강지영,천성관 대한마취과학회 1999 Korean Journal of Anesthesiology Vol.37 No.4
Background : The aim of this study was to evaluate the influence of oral clonidine premedication on respiratory mechanics by tracheal intubation in smokers. Methods : Thirty male smoker patients were randomly divided into 3 groups. For group 1 (n = 10), l μg/kg of clonidine was premedicated. For group 2 (n = 10), 2 μg/kg of clonidine was premedicated. Group 3 (n = 10, control group) was the no premedication group. After anesthetic induction, CMV was applied with a Siemens Servo 900C ventilator, and anesthetic gases were supplied via the low pressure inlet of the ventilator. Tidal volume (10 ml/kg) was fixed during measurements for each patient. End-inspiratory occlusion was applied for at least 3 seconds and tracheal pressure was measured at the distal end of the endotracheal tube. Pressure, flow and volume were monitored and recorded with a Bicore CP-100 pulmonary monitor. Data were measured after 2 (100% O2) and 5 (1.5 vol% enflurane with 50% N2O) minutes of tracheal intubation. Data were transferr to PC and analyzed by processing software (ANADAT). Total respiratory (Rrs), airway (Raw) and tissue (Rve) resistances, along with static (Cstat), dynamic (Cdyn) compliances were calculated. Results : There were no significant differences for Rrs, Raw, Rve, Cstat and Cdyn in the three groups. Conclusions : Oral clonidine premedication in dosages up to 2 μg/kg do not affect the changes of respiratory mechanics caused by tracheal intubation in smokers. (Korean J Anesthesiol 1999; 37: 545∼550)