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정영범(Young-Beom Jung),김길신(Kil-Sin Kim),박창호(Chang-Ho Park),윤용범(Yong-Beom Yoon) 한국조명·전기설비학회 2011 조명·전기설비학회논문지 Vol.25 No.10
Though Korea has introduced CBP(Cost Based pool) power trading system since 2001, long-term Generation system planning has been executed by government for Cost minimization every 2 years. Until currently the model which is used for Generation system planning and best-mix only considers cost minimization and total yearly or quarterly electricity demand every year. In a view point of one day power supply operation, technical characteristics, like the ramp up/down rate of total generation system, minimum up/down time and GFRQ(Governor Free Response Quantity), are very important. this paper analyzes Optimal Fuel-Mix for 2022 Korea generation system satisfying these constraints of each fuel type and considering pump storage plants, construction cost and CO2 emission charge Using MILP(Mixed Integer Linear Programming) method. Also the sensitivity analysis which follows in future power industry environmental change accomplished.
웨이브렛 계수를 이용한 고저항 지락고장 감시데이터 산출방법 연구
정영범(Young-Beom Jung),정연하(Yeon-Ha Jung),김길신(Kil-Sin Kim),이병성(Byung-Sung Lee),배승철(Seung-Chul Bae) 대한전기학회 2013 전기학회논문지 Vol.62 No.2
As the increasing HIF(High Impedance Fault) with the arc cannot be easily detected for the low fault current magnitude compared to actual load in distribution line. However, the arcing current shows that the magnitude varies with time and the signal is asymmetric. In addition, discontinuous changes occur at starting point of arc. Considering these characteristics, wavelet transformation of actual current data shows difference between before and after the fault. Althogh raw data(detail coefficient) of wavelet transform may not be directly applied to HIF detection logic in a device, there are several developing methods of HIF monitoring data using the original wavelet coefficients. In this paper, a simple and effective developing methods of HIF monitoring data were analized by using the signal data through an actual HIF experiment to apply them to economic devices. The methods using the sumation of the wavelet coefficient squares in one cycle of the fundamental frequency as the energies of the wavelet coefficeits and the sumation of the absolute values were compared. Besides, the improved method which less occupies H/W resouces and can be applied to field detection devices was proposed. and also Verification of this HIF detection method through field test on distribution system in KEPCO power testing center was performed.
배전선로 고저항 지락고장 검출방법 및 자동화시스템 적용방안
정영범(Young-Beom Jung),신동열(Dong-Yeol Shin),박창호(Chang-Ho Park) 한국조명·전기설비학회 2011 한국조명·전기설비학회 학술대회논문집 Vol.2011 No.5월
This paper shows the research project for development of practical method for high impedance ground fault detection, analyze the various detection technique and an overseas relay application. Like this analysis led a reliable detection method and introduced an experiment plan. Also compared DAS IEDs characteristics and investigated proper location, detection machinery and system scheme