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사고위치에 따른 분산전원 고립운전 상태 검출에 관한 연구
정승복(Seung-Bock Jung),김재철(Jae-Chul Kim) 한국조명·전기설비학회 2003 한국조명·전기설비학회 학술대회논문집 Vol.2003 No.-
This paper studies islanding detection algorithm of distributed generation(DG). The study of islanding detection has been disconnected DG when power islanding was detected but fault type wasn"t distingish. Nearby feeder fault the fault of feeder that not interconnected DG, is a little affect DG and distribution system. Therefore DG not need to disconnect distribution system. We studied islanding detection algorithm considering fault location.
전력계통의 전력품질 외란을 고려한 플리커 평가에 관한 연구
정승복(Seung-Bock Jung),김재철(Jae-Chul Kim),이봉이(Bong-Yi Lee),조현경(Hyun-Kyung Cho) 한국조명·전기설비학회 2005 한국조명·전기설비학회 학술대회논문집 Vol.2005 No.5월
This paper studies flicker evaluation considering power quality disturbance. A flicker problem with light device irritates human"s eyes. Also, the flicker problem has an fluence on adverse effect such as rolling device and rotating device. However, a study of flicker evaluation is not complete. A flicker is measured and evaluated at monitoring point. But, we consider power quality disturbances such as voltage sag and transient that cause fault and inverter/breaker switching. Power quality disturbances affects flicker evaluation. A flicker evaluation index increases. Therefore, we consider power quality disturbances. We detect voltage sag and transient using wavelet and evaluate flicker without flicker index including power quality disturbances.
정승복(Seung-Bock Jung),김재철(Jae-Chul Kim),이봉이(Bong-Yi Lee) 한국조명·전기설비학회 2004 한국조명·전기설비학회 학술대회논문집 Vol.2004 No.11월
This paper studies protective coordination of utility interconnected multiple distributed generations(DG). The study of protective coordination interconnected DG has been conducted. A protective coordination of utility disturbed by reverse current of DG. Therefore, A protective device is not operate when reverse current flows In this paper, we use phase difference between Ⅴ and Ⅰ. Also, we studied protective coordination algorithm of utility interconnected multiple DG.
전력계통의 전력품질 외란을 고려한 플리커 평가에 관한 연구
정승복(Seung-Bock Jung),김재철(Jae-Chul Kim) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.5월
This paper studies flicker evaluation considering power quality disturbance. A flicker problem with light device irritates human"s eyes. Also, the flicker problem has an influence on adverse effect such as rolling device and rotating device. However, a study of flicker evaluation is not complete. A flicker is measured and evaluated at monitoring point. But, we consider power quality disturbances such as voltage sag and transient that cause fault and inverter/breaker switching. Power quality disturbances affects flicker evaluation. A flicker evaluation index increases. Therefore, we consider power quality disturbances. We detect voltage sag and transient using wavelet and evaluate flicker without flicker index including power quality disturbances.
조현경(Huyn kyung Cho),김재철(Jae-Chul Kim),정승복(Seung-Bock Jung),임상국(Sang Kug IM) 한국조명·전기설비학회 2006 한국조명·전기설비학회 학술대회논문집 Vol.2006 No.5월
This paper analyzes the effect of the energy saving and evaluates the economics using High Efficiency lighting. About 18 percent (17,000GWh) of total power demands in Korea are consumed in the lighting field. There isa lot of energy potential that can be saved because the power demand islower relatively than the others parts. The existing lighting that its length and electric energy are 32[mm] and 40[w] can alternate with high efficiency lighting which its length and electric energy are 26[mm] and 32[w]. Two Lightings is measuring the illumination and the electric energy and then are analyzed into the effect of the lighting saving by measurement.