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부분방전 신호 분석을 위한 퍼지 알고리즘 적용 및 평가에 관한 연구
金珍洙(JinSu Kim),金容甲(Yong K. Kim) 대한전기학회 2006 전기학회논문지C Vol.55 No.4
In this paper, we have studied for analysis of the partial discharge(PD) signal in underground transmission line. The PD signal has estimated as detected signal accumulation of a PRPDA method by using Labview, and analyzed with fuzzy algorithm. In our algorithm, we developed system configuration that detected accumulating PD signal using by Labview and programmed fuzzy algorithm can be analyzed the PD signal using with Matlab. With practical PD logic implementation of theoretical detected system and hardware implementation, the device for Hipotronics Company's 50㎸ setup has generated and then has applied with 15k~17㎸ with 1:1 time probe. It's also used the LDPE 0.27mmt (scratch error 0.05mmt) to sample for making PD. In conclusion, Our new class of PD detected algorithm has also compared with previous PRPDA or Fuzzy algorithm. which has diagnose more conveniently by adding numerical values.
퍼지 알고리즘을 이용한 부분방전 신호의 진단에 관한 연구
김진수(Jinsu Kim),박재완(Jaewan Park),박건준(Keon-Jun Park),오성권(Sung-Kwun Oh),김용갑(Yong K. Kim) 한국지능시스템학회 2005 한국지능시스템학회 학술발표 논문집 Vol.15 No.2
In this paper, we introduce about a new class to analysis of partial discharge signal based on Fuzzy model. We can early diagnose life of power cable through detection of partial discharge signal. However, partial discharge signal detector is difficult because of partial discharge signal is very non-linear. Also, it is very difficult work that separate partial discharge signal from noise. We constructed partial discharge accumulation detection system that use Labview for detection of non-l i near partial discharge signal. And analyzed partial discharge signal that is detected by Labview system utilizing Fuzzy model.
전력선 통신 기반 HD급 미디어 전송 시스템 설계 및 성능 분석
김지형(Ji-Hyoung Kim),김관웅(Kwan-Woong Kim),김용갑(Yong K. Kim) 대한전기학회 2010 전기학회논문지 Vol.59 No.1
Due to a development of a modem technology as Power Line Communication(PLC) over 200 Mbps, the high-speed multi-media data trasmission could be currently possible. The strength of the PLC has no more additional wiring work. PLC has also possible to high quality data transmission with currently electrical cable. It has a various strong point campare with existing wire and wireless communication technologies. In This paper we develop a high quality media transmitter-receiver based on merging the HomePlug AV, which is 200 Mbps class PLC technology and HDMI Interface technology. The video function was used for the VEDEO TEST GENERATOR in order to a property valuation. Smart Live 6 software were used for the assessment of audio property. As the result of measurement of the HD class images by capturing from the receiver of the PLC, the quality of images couldn't be confirm any deterioration, which has compared with original reflections. In case of audio part as the result of confirmation of the Phase, Magnitude, it has been confirmed that over 90% of nomal transmition and receiving of acoustic signal. It can be possible to have HD class Media service through the PLC.
Study of Transient Response in Non-uniform Plasma Layer with Optically-Controlled Microwave Pulses
왕설(Xue Wang),최유순(Yue Soon Choi),박종구(Jong Goo Park),김용갑(Yong K. Kim) 대한전기학회 2009 전기학회논문지 Vol.58 No.6
In this paper we develop the characteristic of density on non-uniform plasma in different layer of the semiconductor with optically controlled microwave pulses. The transient response of the microwave pulses in different plasma layer has been evaluated by calculating the variation of the reflection function of dielectric microstrip lines. The lines has used under open-ended termination containing optically induced plasma region, which has illuminated a laser source. The characteristics impedances resulting from the presence of plasma are evaluated by the transmission line model. The analyzes the variation of transient response in a 0.01㎝ layer near the surface for frequency range from 1㎓ to 128㎓. The diffusion length LD is larger than compared to the absorption depth 1/αι. The variation of characteristic response in plasma layer with microwave pulses which has in deferentially localized has been evaluated analytically.
양복영(Bok-Yeong Yang),이현룡(Hyun-Ryoun Lee),김용갑(Yong-K. Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
there are several methods to raise the LED efficiency. In this paper, we designs a simulation(method) to promote the LED efficiency by attaching another lens to a lead type LED lamp. this concentrates a dispersed light.