• Proceedings of the KIEE Conference
• /
• 2003.07c
• /
• pp.1615-1617
• /
• 2003

건설 중인 한국전력공사 765 kV 신태백 및 신가평변전소 GIS에 적용한 UHF 부분방전 센서의 사양을 제시하고 이에 대한 설명을 하였다. 또한 765 kV GIS에 센서를 취부하여 시험을 통해 센서의 주파수 특성시험과 감도 특성시험을 하였다. 아울러 센서성능을 측정하는 데에 필요한 장치와 회로를 보였고 시험결과를 이용하여 한전 사양을 충족시키는 방안을 제시하였다.

• Proceedings of the KIEE Conference
• /
• 2000.11b
• /
• pp.297-299
• /
• 2000

본 논문은 휴대용 기기 충전을 위한 영구 자석형 선형 발전기의 특성 해석을 담고 있다. 발생된 전력의 크기와 용량, 충방전 시간 측정을 포함하고 있으며, 전압 평활화에 따른 결과 역시 고려하였다.

• Proceedings of the KIEE Conference
• /
• summer
• /
• pp.485-487
• /
• 2004

High-voltage gas-insulated circuit-breaker must interrupt short-circuit current successfully when breakdown occurs in electric power system. Among many test-duties, Basic Terminal fault T100a(BTF T100a) is the one of the severest duties because of its high DC component of short-circuit current. In this paper, we developed 245kV 50kA gas circuit breaker using control circuits to reduce DC component while interrupting short-circuit current, then got good performance through high-power tests in Korea Electrotechnology Research Institute(KERI) and KEMA

• KEPCO Journal on Electric Power and Energy
• /
• v.7 no.1
• /
• pp.73-77
• /
• 2021

As the big data analysis technologies has been developed worldwide, the importance of asset management for electric power facilities based data analysis is increasing. It is essential to secure quality of data that will determine the performance of the RISK evaluation algorithm for asset management. To improve reliability of asset management, asset data must be preprocessed. In particular, the process of cleaning dirty data is required, and it is also urgent to develop an algorithm to reduce time and improve accuracy for data treatment. In this paper, the result of the development of an automatic cleaning algorithm specialized in overhead transmission asset data is presented. A data cleaning algorithm was developed to enable data clean by analyzing quality and overall pattern of raw data.

• Journal of Korean Association for Spatial Structures
• /
• v.18 no.2
• /
• pp.11-14
• /
• 2018

• 한국가스학회:학술대회논문집
• /
• 2004.11a
• /
• pp.158-163
• /
• 2004

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
• /
• v.5B no.2
• /
• pp.111-117
• /
• 2005

Several of the conventional hydraulic systems in an automobile are now being replaced by more reliable and energy efficient electromechanical systems. Developments in the brushless permanent magnet machine and in the power and control electronics are the key factors responsible for this transformation. These applications brought out some performance challenges associated with the brushless machines. This paper will focus on these challenges to be able to use these machines in such applications. In terms of replacing hydraulic systems with electromechanical systems, steering system is leading the way in automobiles. Currently, steering systems using Electro-hydraulically assisted systems and Electrically assisted (Electromechanical) systems are in the market. Though the Electrically assisted power steering has several advantages over other systems, certain performance and cost challenges delayed the penetration of such systems in to the market.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2006.08a
• /
• pp.491-494
• /
• 2006

A number of research groups and companies have succeeded in employing various SLS schemes to create low defect-density Si films on glass substrates for making high performance TFTs. In this paper, we first point out that SLS can be utilized to just as effectively handle crystallization of thin Si films on polymer substrates, and then present preliminary results on high-performance circuits that are built using the materials.

• Corrosion Science and Technology
• /
• v.4 no.5
• /
• pp.207-210
• /
• 2005

Coating performance of various coating systems including chlorinated rubber and epoxy/urethane used most for steel structures of highway in Korea, was evaluated by exposing test specimen to complex deterioration factors such as ultraviolet ray, moisture, freeze-thaw cycle and salt. Deteriorated specimens were evaluated by chalking and rust grades according to ASTM, and measurement of color differences and adhesion. In overall coating performances such as corrosion resistance, photochemical stability, and adhesion, ceramic/ urethane, moisture-curable urethane/ urethane, etc. were superior. As for other coating materials tested in this study, superior materials against certain deterioration factors may be inferior against other factors. Accordingly, in order to select suitable maintenance coating materials for the use, it is thought that investigation of suitability through experiment should precede selection of materials, especially for unusual coatings or paints.

• Proceedings of the KIEE Conference
• /
• 1995.11a
• /
• pp.169-171
• /
• 1995

Automatic control equipment in hydro power plant, such as turbine governor or automatic voltage regulator have to act promptly against for variation of power system, so it is necessary to check and test continuously. During last five years, the performance test of automatic control equipment was performed about 20 units of hydro turbine generator. In this process, because it has complex connection and before calibration, signal conditioner was developed as an auxiliary equipment for performance test. It includes function of signal amplifier, transducer, and meters. As a result of use this equipment for electric governor test at soyang-gang hydro power plant, it was possible to find output data equal to old one.