• 한국정보통신설비학회:학술대회논문집
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• 한국정보통신설비학회 2008년도 정보통신설비 학술대회
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• pp.573-578
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• 2008

While going through economic development for several decades, Korea has become an industrialized country, and the development of industrial technology accelerated the advent of the information opportunity era. The recent information oriented society has brought forth the development of new information communication technology that enables anybody to obtain information easily and simply, and recently power line communication technology is being developed that allows the use of the existing power line net-works as they are. Each advanced country that faced up to a riffle effect of power line communication technology that enables us to obtain information easily anywhere at anytime is engaged in fierce competition to be a leader in this technology and to preoccupy the standardization of power line communication technology. At this point, this study is to help Korea take the lead in information communication technology by proposing a direction for the standardization that Korean power line communication technology needs to head for by identifying the trend of the worldwide of power line communication technology.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 D
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• pp.2499-2501
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• 2001

Today many researches are accomplished for power line communication. But It is very dangerous to communicate with devices using power line. Because power line is an candidate to cope with the existing communication channels. So It is need to be measured the properties of power line as communication channels, before successful communication system is possible. In this paper, we re-analysis the characteristics of power line and suggest an implementation technique for the high-data-rate power line communication modem.

• 조명전기설비학회논문지
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• 제26권7호
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• pp.92-98
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• 2012

It is made compulsory to install SPD for the purpose of protecting electric and electronic devices when an abnormal voltage such as lightning occurs to power line using power frequency of 60Hz. Recently, the high speed communication technology utilizing power line is receiving attention again as a communication technology for smart grid. The SPD influences the performances of power line communication when using SPD and power line communication system together. In order to improve the performance of power line communication, a proposed scheme for series connection of gas discharge tube to ZnO varistor was presented. This paper measured the impacts of series connection of GDT to SPD using ZnO varistor on the limit voltage of Class III SPD. This paper also presented the DC operating voltage of GDT which satisfies the limit voltage of power line communication system and SPD simultaneously.

• 센서학회지
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• 제24권5호
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• pp.342-347
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• 2015

We introduce an indoor broadcasting system using light-emitting diode (LED) lamps coupled with a 220 V power line. Two couplers connected to the power line constitute a power line communication (PLC) link. The transmission path from an LED lamp to a photodetector forms a visible light communication (VLC) link in free space. When the LED lamp is coupled to the power line, a composite PLC-VLC link is formed, making it possible to transmit a VLC signal beyond line-of-sight. In experiments, a 4 kHz analog signal modulated with a 100 kHz carrier was sent to the power line by a PLC coupler, and LED lamps coupled to the power line detected the signal and radiated it to multiple VLC receivers in the room. This configuration is useful in expanding an indoor VLC sensor network to adjacent rooms or constructing a voice broadcasting system in a building or apartments with existing power lines.

• 산업기술연구
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• 제21권A호
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• pp.207-211
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• 2001

For the power line communication, we studied its characteristic impedance, noise characteristics, loss characteristics and the coupling circuit between the communication MODEM and power lines. As the results of the experiments, we concluded that the power line impedance in a house varied in the wide range because the electric systems generate the current and voltage hamornic noises.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.41-44
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• 2003

We propose portable equipment that monitors current and voltage of high-potential power transmission lines. In the equipment, a current and voltage sensor are attached to an insulator that supports a power transmission line: A clamped to the power line and the detected current signal is transmitted to the ground station by a wireless optical link using transmission line is detected by a high resistance element, zinc oxide (ZnO). That acts as a potential divider between the power line and ground. We make an experimental device for 66kV power line and demonstrate that it can monitor currents proposed equipment is small-sized, light, and inexpensive in comparison with the conventional CT (current transformer) and PT (potential transformer) since it does not require high potential insulators and magnetic cores, further, the equipment is easily installed owing to its small size and its simple structure.

• 산업기술연구
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• 제19권
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• pp.81-89
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• 1999

We have developed a power line simulator which is one of the basic tools for the research of the power line communication and its control system. In the developed simulators, we have considered the transfer function of the power line, noises and signal attenuation characteristics. Simulator was made using the matlab tool program. We made the power line modern using the FSK chip(ST7537) and experimentalized to show the efficiency grade of simulator. We have expected that the developed simulators are very useful in the area for the power line communication research and the control system design.

• 한국마린엔지니어링학회:학술대회논문집
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• 한국마린엔지니어링학회 2000년도 추계학술대회 논문집(Proceeding of the KOSME 2000 Autumn Annual Meeting)
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• pp.115-122
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• 2000

Recently, a study on the Power Line Communication has been done by many companies and institutes due to its own merits that we can use the power line as a communication channel. But, there are serious problems about the harsh and unpredictable characteristics - noise, signal distortion and attenuation to be overcome in order that we commercialize the Power Line Communication. In this paper, we analyse the power line characteristics and apply the technology of PLC to control power of electric machinery by using ASK modulation.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 춘계학술대회
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• pp.880-883
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• 2015

배전선 케이블을 식별하는데 전력선 통신기술이 제안된다. 전력선 통신 기술의 응용 영역을 확대하게 된다. 고주파 신호는 배전선에서 전달 능력에 한계 능력을 갖는다. 보통 배전계통의 전력 변압기는 그러한 고주파 신호의 전달을 차폐하게 된다. 이러한 제안된 전송제한 방법을 사용하여 케이블을 식별하는데 적용된다. 새로운 형태의 전력선 케이블 식별시스템이 설계 및 구현된다. 시스템은 전력선 통신 모듈을 바탕으로 송수신기로 구성된다. 이론적 개념을 검증하기 위한 실험이 행하여진다. 또한 시뮬링크 시뮬레이터를 사용하여 개념에 대한 이해를 위한 시뮬레이션이 수행된다.

• Journal of Advanced Marine Engineering and Technology
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• 제25권4호
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• pp.889-897
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• 2001

Recently, a lot of studies on the power line communication(PLC) are being done by many companies and institutes due to its own merit which can use the power line spread widely as a communication channel. But, there are many serious problems about the harsh and unpredictable characteristics, or noise, signal distortion and attenuation to be overcome for commercialization. In this paper, the power line characteristics as the view point of communication channel are investigated and the technologies of PLC are proposed to control the power of electric machineries by using the combined method of ASK modulation and microprocessor technologies. Also experiments are carried out to ascertain performance in case of applying to electric lights control according to various distancea as an example.