http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
MPC 하전이 전기 집진기의 미세 분진 집진 특성에 미치는 영향
김용진(Kim Yong Jin),황태근(Hwang Tae Geun),유주식(Yu Ju Sig) 대한공업교육학회 2003 대한공업교육학회지 Vol.28 No.2
This study investigates the effect of MPC voltage on the collection efficiency of particles in a cylindrical electrostatic precipitator. Fine particles of NaCl and A1₂O㎖ with diameter in the range of 0.015㎛-00.6㎛ are generated with an atomizer and a diffusion dryer. The collection efficiency of negative corona is higher than that of positive corona. The effect of pulse energization on the collection efficiency is not significant when the applied voltage is large, but the effect appears to be great when the applied voltage is small. And the particle of Al₂O3 is more strongly affected by the pulse energization than that of NaCl.
최소자승법을 이용한 Y-Δ 변압기 누설 인덕턴스 추정 방법
姜龍澈(Yong-Cheol Kang),黃泰根(Tae-Keun Hwang),李炳銀(Byung-Eun Lee),張成一(Sung-Il Jang),金容均(Yong-Gyun Kim) 대한전기학회 2007 전기학회논문지 Vol.56 No.4
This paper proposes a parameter estimation technique of a power transformer. Based on the combined equation, it estimates separately the primary and secondary leakage inductances using the least square method from the instantaneous voltages and currents in the steady state. The performance of the proposed technique was investigated by varying the cut-off frequency of the filter and the number of samples per cycle. The estimated values are obtained based on the average value for 41 cycle.
Agent 기반 변압기의 Sympathetic inrush 판단 방법
강용철(Yong-cheol Kang),이병은(Byung-eun Lee),박종민(Jong-min Park),황태근(Tae-keun Hwang),장성일(Sung-il Jang),김용균(Yong-gyun Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The protection relay keeps electric power facilities by using signals of the voltage and current which are input and output terminals of each equipment. Each relay performances protection algorithm by using informations of own protecting zone. To prevent the mal-operation in inrush current, established transformer differential protection method uses the second harmonics as blocking signal. This method is not operate at the initial inrush. However, in case of the parallel operation, if the initial inrush is occurred in one transformer which is generated, the sympathetic inrush is occurred in adjacent transformer. This paper approach the sympathetic inrush detecting algorithm of a transformer based on agent. Proposed algorithm, when inrush current occurred, distinguish sympathetic inrush or not by using differential current of adjacent transformer. This algorithm have the advantage of the distinguishing initial inrush and sympathetic inrush at operation of parallel transformer
정전구간 최소화를 위한 방향과전류계전기 기반 분산전원 보호 방법
강용철(Kang, Yongcheol),이병은(Lee, Byungeun),김은숙(Kim, Eunsuk),황태근(Hwang, Taekeun),이지훈(Lee, Jihoon),차선희(Cha, Sunhee),박종민(Park, Jongmin),정태영(Jung, Taeyoung) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
Distributed generation (IX;) plays an important role in the power system nowadays. Over-current relay, widely used in the DG protection, causes a wide outage section and long time delay. This paper proposes a DG protection technique to minimize the outage section. The proposed method uses three directional over-current relays with delay, which are connected to the point of common coupling. The method can minimize the outage section.