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陳保建,李康奭,崔勉松 명지대학교 산업기술연구소 2005 産業技術硏究所論文集 Vol.24 No.-
This paper presents a method, which raises the efficiency of the next-generation intelligence management system using web, and a scheme for the development of central intensive detection and control system. The possibility of the control of the power devices has been verified in case study.
안용진,강상희,최면송,이승재 明知大學校 産業技術硏究所 2000 産業技術硏究所論文集 Vol.19 No.-
This paper describes a fault location algorithms that achieve a high accuracy almost not influenced by the variations of the source impedance, load current and fault impedance. The proposed algorithms use post-fault voltage and current taken at only one-terminal and does not require the zero sequence current of the adjacent parallel line. The fault location algorithms have been developed through the following steps: establishing two KVL equations around the parallel line loops, the distribution factors for positive sequence and zero sequence current components are obtained. They are utilized for estimating the fault current and zero sequence current of the adjacent parallel line. Applying these to the voltage equation at the measuring point (or relaying point) and separating the real and imaginary parts, the fault resistance can be eliminated and final equation which is a function of only a fault location variable can be obtained.
이승재,김국진,최면송,강상희 明知大學校 産業技術硏究所 2000 産業技術硏究所論文集 Vol.19 No.-
In the point of view a protective relay, the selectivity and sensitivity is very important in its performance. The correct setting of the relay parameter is required. The verification of accurate setting for the protective relay is very difficult before a actual fault occur. In this paper, we proposed the diagnosis expert system as a method to verify the correctness of the relay setting. The developed system proved effectiveness through the tests on the real systems.
Jin Myeon Park,Seong Eun Lee,Tae Jun Lim,Jae Seung Noh 한국토양비료학회 2013 한국토양비료학회지 Vol.46 No.6
This study was carried out to investigate the effect of slurry composting and biofiltration (SCB) liquid manure application on shoot growth, fruit qualities and soil chemical properties in peach orchard. SCB liquid manure was fertigated ten times from April to October in SCB plot, whereas chemical fertilizer was treated two times as basal and additional fertilizers in control plot. The shoot growth, leaf nitrogen and potassium content, soil exchangeable K, fruit weight and yield were higher in SCB plot than in control. Soluble solid content and acidity, soil organic matter, soil available phosphate and soil exchangeable Mg showed no significant difference between treatments, and the leaf calcium and magnesium content were lower in SCB plot than in control. In conclusion, fertigating SCB liquid manure in peach orchard has positive effects on fruit weight and yield, and it is suggested that periodical soil testing is needed because of the possibility of K accumulation in SCB liquid manure treated soil when the orchard is fertigated based on the soil nitrogen content.