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코로나방전 감시를 위한 계층적 무선센서네트워크 라우팅 알고리즘 최적화 연구
정경열(Kyung-yul Chung),박창대(Chang-dae Park),임병주(Byung-ju Lim),이후락(Hoo-rock Lee),심상용(Sang-yang Sim),김용환(Yong-hwan Kim),류길수(Keel-soo Rhyu) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10
For the electric corona discharge surveillance network for electric power equipments, we found a suitable routing algorithm for the wireless sensor networks. It is the LEACH-C(Low Energy Adaptive Clustering Hierarchy-Centralized) routing algorithm which is centralized cluster formation method of LEACH.
지중배전 열화진단을 위한 무선센서 네트워크에 관한 연구
정경열(Kyung-Yul Chung),이후락(Hoo-Rock Lee),최대석(Dae-Seok Choi),김용식(Yong-Sik Kim),이수태(Soo-Tae Lee),류길수(Keel-Soo Rhyu) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-
In this paper, method of a simple wireless sensor network for detecting and locating faults as well as for underground cable monitoring are presented. The main novelty of the concept is in source based routing network characteristics on system level with low power hardware. This method enables the underground electrical distribution system monitoring to be simple.
PV모듈에서 태양전지의 출력 불균일에 따른 직병렬 회로의 손실특성 분석
정경열(Kyung-Yul Chung),이진섭(Jin-Seob Lee),김용식(Yong-Sik Kim),이후락(Hoo-Rock Lee) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
The current and voltage of photovoJtaic module are determined according to serial-parallel circuit designs. The environmental, electrical and physical sources give effects on current-voltage mismatches of PV module and array. They also bring power loss and short-term durability. PV system could generate more power if we consider the mismatch of the system. In this paper, the electric characteristics and thermal phenomenon are deeply examined by counting current mismatch in serial circuit. On the other hand, parallel circuit is also examined for the electric and thermal characteristics due to voltage difference of the system.
코로나 방전영상 검출을 위한 Dual DSP 기반 크로마키 영상합성에 관한 연구
정경열(Kyung-yul Chung),임재우(Jae-woo Lim),박창대(Chang-dae Park),임병주(Byung-ju Lim),이후락(Hoo-rock Lee),강성원(Sung-won Kang),홍진기(Jin-ki Hong),이창희(Chang-hee Lee),김용식(Young-sik Kim) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.4
In order to diagnosis invisible corona discharge, overlay method has been used with UV band and visible band video display. In this paper, in order to confirm position of corona discharge through detecting UV band of 230~280㎚ wavelength, two high efficient DSP and Linux program with embedded system to operate DSP have been used. We used chromakey compositing method to combine UV band and visible band video display.
분산이벤트 기반 센서네트워크 패킷 라우팅 프로토콜 시뮬레이션
정경열(Kyung-Yul Chung),이후락(Hoo-Rock Lee),최대석(Dae-Seok Choi),김용식(Yong-Sik Kim),이수태(Soo-Tae Lee),류길수(Keel-Soo Rhyu) 한국마린엔지니어링학회 2006 한국마린엔지니어링학회 학술대회 논문집 Vol.2006 No.-
Simulation and physical implementation are both valuable tools in evaluating sensor network routing protocols, but neither alone is sufficient. In this paper, we present the implementation and analysis of sensor routing protocols on the discrete-event simulation system that allows existing nesC codes of sensor network routing protocols to be used to create a physical implementation of the same protocol. We have evaluated the Surge function of TinyOS through example implementations in the Ptolemy Ⅱ of the unmodified codes and Direct-diffusion routing protocols using VIPTOS simulation models.
센서네트워크에서의 클러스터헤드 기반 라우팅 확정 알고리즘에 관한 연구
정경열(Kyung-Yul Chung),이후락(Hoo-Rock Lee),오진규(Jin-Gyw Oh),최대석(Dae-Seok Choi),김용식(Yong-Sik Kim),이수태(Soo-Tae Lee),류길수(Keel-Soo Rhyu) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-
In condition monitoring system for underground electrical distribution networks, applications based on wireless sensor are necessary to maintain the systems efficiently. Therefore, we need suitable routing determination algorithm and it's topology of wireless sensor networks. We assume that end nodes have tiny-power resources but cluster heads are not restricted power condition. In this paper, we present a simple routing determination algorithm for cluster topology and compare our algorithm, based on a cluster heads beacon mechanism, with previous by a discrete-event simulator.
코로나방전 진단을 위한 Embedded 네트워크 시스템 개발
정경열(Kyung-yul Chung),박창대(Chang-dae Park),임병주(Byung-ju Lim),이후락(Hoo-rock Lee),심상용(Sang-yong Sim),김용환(Yong-hwan Kim),류길수(Keel-soo Rhyu) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.10
In this paper, we proposed an embedded network system for the electric corona discharge surveillance. The proposed embedded network is possible to configure wired and wireless communication network by cluster units that is for more flexible and expandable. To verification, We have simulations and perform the test by build a small network.
고압 지중 XLPE케이블의 TF-MAP 해석을 이용한 PD와 잡음의 분류
정경열(kyung-Yul Chung),박정태(Jung-Tae Park),장경선(Kyoung-Son Jhang),김용식(Young-Sik Kim),최대석(Dae-Suk Choi),이수태(Soo-Tae Lee),이후락(Hoo-Rock Lee) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
The application of PD Monitoring System in real space needed to considerate of noise reduction. but, A limit of the noise reduction exist in some filters. Therefore, TFMAP impelemented to reduce noise for classification of PD and noise. This paper showed noise reduction effect of TFMAP in experiment.
지중배전선의 부분방전 원격감시 시스템의 구성과 서버의 역할
정경열(Kyung-Yul Chung),김진영(Jin-Young Kim),이수태(Soo-Tae Lee),최대석(Dae-Seok Choi),김용식(Young-Sik Kim),이후락(Hoo-Rock Lee) 한국마린엔지니어링학회 2009 한국마린엔지니어링학회 학술대회 논문집 Vol.2009 No.-
This paper is the result of on-going research & development of partial discharge remote monitoring system of underground power distribution line, which is installed in the central area of a city. To set up Remote Monitoring System with effective component parts, the Remote Monitoring System on partial discharge is designed as following scheme. The system begins with the operation of sensor equipped at the manhole or some defined spots of underground electricity roadway to precisely measure the signal of partial discharge from the power distribution line. The signals of partial discharge measured at the sensors are analyzed & assorted in the local control unit and transferred through the wireless communication network to the system server. the role of server in this system is considered to enable the measured and analyzed signals at the local control unit to be displayed and to monitor the acquired data, trend, PRPD/PRPS, and in addition, to make conclusions by diagnosis algorithm for using the various data at real-time as well as to classify all accumulated data in database.