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Weak Feed 전력계통의 블랙스타트와 고조파 공진 사례연구
박영철(Young-Chul Park),이은섭(Eun-Seob Lee),손효수(Hyo-Soo Son),이석현(Seok-Hyun Lee) 대한전기학회 2016 전기학회논문지 Vol.65 No.1
In order to recover the power system during the wide power outage or power failure in the power plant, black start system should be properly operated without any problem. Especially power for black start in the geographically isolated areas of electric island is supplied from small emergency start-up generator, and loads are aux systems of gas turbines such as SFC(Static frequency converter). This paper introduces the international practices to overcome the voltage drop problem with harmonics of the system having the DC output such as SFC during black start in weak feed system and analyzes the relationship between house load inputs and harmonics. By varying the house load and input of power supply, this paper identified boundaries between weak feed and strong feed power. In order to verify the theory of stable condition in weak feed power system with DC output, house load is simulated using ETAP. Additionally MATLAB was used for harmonic analysis between the load inertia moment and non load inertia moment.
Psim시뮬레이션과 전동기-발전기(MG) 세트의 출력특성분석
임형택(Hyung-Tack Lim),조다솜(Da-Som Jo),손효수(Hyo-Soo Son),문상수(Sang-Soo Moon),이석현(Seok-Hyun Lee),김근수(Kun-Su Kim),조철희(Chul-Hee Jo) 한국신재생에너지학회 2014 신재생에너지 Vol.10 No.3
The importance of energy is growing according to the energy shortage and environmental concerns. Accordingly, in order to solve the problems about the use of fossil fuel, a renewable energy sources are needed. Global renewable energy power industrys position in the renewable energy market becomes important and new technology development is also essential. MG set composed by the induction motor and permanent magnet synchronous generator for simulating a renewable energy source is based on a suitable experiment equipment. The torque generated by applying a voltage to the induction motor in MG set is used as an input of the permanent magnet synchronous generator. In Psim simulation, the characteristics of the induction motor model was formulated and the output torque characteristics of the motor was controlled using the induction motor side inverter, In this paper, the comparison analysis between Psim simulation and the output characteristics of the MG set is performed in order to identify a renewable energy power system more accurately.