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尹載殖,金元燮,金斗錫 全北大學校 1982 論文集 Vol.24 No.-
This paper describes the experimental results for a Development of Fuel cell which is connected to a Generator system as a power-source. The fuel-cell power system model used in our experiments is composed of 2kW (100V, 20A rating) alkalielectrolyte H_2-air fuel cell and DC-AC converter. We carried out many experiments under the condition that this fuel-cell power system as a power source was connected with a simulated distribution network. We obtained its static characteristics and transient characteristics when voltage fluctuation or short-circuit failure occurred in the distribution network. From these results, We have found that fuel-cell power system is able to apply to a distribution system. And also, this paper describes basic matters and problems for conceptional design about a feulcell power plant to practical use. We investigate as following factor : ㆍapply points of a fuel-cell power plant in electric power system. ㆍtarget rating of a fuel-cell power plant. ㆍsystem composition of fuel-cells and inverter. ㆍrequired operational performance of its power plant. ㆍestimation of H_2-gas production methods. ㆍtechnical study problems in future We believe firmly that this paper is very useful when the utility introduce a fuel-cell power plant as a power source in electric power system.
金東弼,金元燮,金斗錫 全北大學校 1981 論文集 Vol.23 No.-
Recent increase in power supply capacity modernization and rationalization of high voltage distribution lines in korea requires electrically and mechanically more reliable insulators. The electical porcelain which has made today's EHV power transmission possible must be highly reliable in its mechanical strength as well as in electrical properties. Many studies have been made in search for a better porcelain that meets the requirements. This report portrays and compares various aspects and characteristics of electrical porcelains such as Conventional Porcelain, Alumina Porcelain and Cristobalite Porcelain in terms of their characteristics and applications. Also explained are the studies made on compression glaze, internal stress, size effect and electrical properties. Spiral rod line post insulators have been developed out of these needs and they have already demonstrated excellent performances in service. The outstanding features of these insulators are as follows. 1) As alumina porcelain is used, mechanical strength and power are resistibillity are excellent. 2) They are free from deterioration and puncture because of the solid core construction, virtually maintenance-free. 3) The insulation level is 1.5 times that of the existing pin type insulators. This strengthened insulation level is effective for preventing lightning flashover of the insulator and therefore it is also effective to protect insulated conductor from power arc melting breakage. 4) They show superior characteristics under heavy pollution conditions due to the antipollution design of insulator profile.