• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.12
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• pp.110-114
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• 2008

In recent years, the standard for harmonics has established and applied in many countries. However a harmonic management has not performed for the absence of standard and procedure in Korea. For this reason, the standard establishment for harmonic based on the main purpose of international harmonic standards and property of domestic transmission system is required. This paper describes the software of assessment of harmonic emission limit for customer at HV System using Microsoft Excel.

• Journal of the Korean Institute of Intelligent Systems
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• v.23 no.2
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• pp.107-112
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• 2013

In the paper, velocity controller of switching module and temperature controller for the high-voltage static var compensator are proposed. Because of the continuous increase in demand for electric power, transmission and distribution facilities of power plant are required. There is a bottleneck problem of transportation routes according to new construction and expansion of power transmission facilities. Therefore there are researches to maximize the utilization of existing facilities and to increase transmission capacity without new construction. The previous static var compensator detects voltage of input circuit of power, switches the SCR directly and generates switching noise. The proposed method increases switching velocity and decreases noise using switching control based on the voltage between both sides of SCR. Also the proposed method enhance the stability using realtime temperature control for heating of the system from increase of switching velocity. We experiment the velocity and temperature control of the proposed high-voltage static var compensator in the real environment and verify the performance of the proposed system by applying in the real field.

• The Journal of the Korea institute of electronic communication sciences
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• v.16 no.4
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• pp.577-584
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• 2021

Electrical energy is an essential component in present societies, which is an important basis for our technological society. In the design of new power infrastructure, it is important to consider the psychological aspects of how our culture considers and aspects its development as an integral component of the community environment. The construction of new high voltage overhead transmission lines has become a controversial issue for public policy of government due to social opposition. The members of community are concerned about how these power lines may have an impact on their lives, basically caused by their effects on health and safety. The landscape and visual impact is one of the most impact that can be easily perceived for local community. The computer 3D simulation of new landscape is illustrated by a real life use corresponding to the selection of the power line route with least observability for local community. This paper used ArcGIS(geographic information system tool) for planning, survey, basic route and detailed route, route for implementation of transmission line corridor. Also, the paper showed the map of natural environment, living environment, safety and altitude using database of power line corridor, and transmission siting model was developed by this study. The suggested landscape of computer simulation with lowest visibility on a power line zone can contribute to reducing oppositions of local community and accelerating the construction of new power lines.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.13 no.2
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• pp.341-347
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• 2009

As a right-of-way security for the high power transmission line tower construction is becoming more and more difficult, the friendly environmental compact tower design is required. For a proper insulation for the compact tower, the polymer material are being tried. Some countries has already adapted, in the various polymer application and management data, polymer arm insulator to the transmission tower, and shown a stable operation. However, in our country, the polymer arm insulator has left much to be desired in the installation on the transmission line tower. But polymer material has been developed by high strength and technology and is expected to be used in various electric equipments. The polymer arm insulator is a one of good electric insulation materials to expand the power supply capacity in the rapid power demand increasement In this research, the new polymer am insulator is designed and its electric specifications are analyzed. Its mechanical specifications is verified through the field test on the compact tower which is modified by the polymer arm insulator.

• Tunnel and Underground Space
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• v.8 no.3
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• pp.194-199
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• 1998

This research was aimed to figure out the trend of dust diffusion at open pit limestone mine for assessing the environmental impacts on the high voltage power transmission line. It is rather easy to assess the dust generation and size distribution of limestone dust at the blasting site, but it is very hard to assess the expected area of dust diffusion and amount of dust fall by the distances from the dust source. In this research, a 3-dimensional fluid dynamic simulation software (3D-Flow) was used for analysing the above mentioned matters to assess the impacts to the insulators on the transmission tower by the blasting dust. It was verfied that the 3D-Flow is reliable tool for simulating dust movement, and the limestone dust is not much hazardous to the power transmission line.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.22 no.9
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• pp.94-102
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• 2008

Capacitor switching is essential for the economic operation and proper voltage control of KOREA electric utility distribution system. Voltage transients produced by capacitor switching (around 2.0 per unit at substation and 2.5 or less per unit at customer site, and lasting less then 1[ms]) do not have the magnitude or duration to interfere with the operation of computers, but they do disrupt the operation of adjustable speed drivers. The result of our research, ASD manufacturers should learn from the computer industry and design products that will operate satisfactory In the electrical envelopment in which they will be placed. In this case history, the inductors on the input to ADSs in order to prevent nuisance tripping from capacitor switching(and other causes within the apartment) proved to be an effective, low-cost solution.

• 한국지구과학회:학술대회논문집
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• 2005.09a
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• pp.112-123
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• 2005

자기지전류 탐사의 적용에 있어 인공잡음의 영향은 탐사의 승패를 좌우하는 중요한 요소이며 인공잡음의 영향을 최소화할 수 있는 탐사의 설계와 자료처리가 요구되고 있다. 본 연구에서는 수치공간자료를 이용한 공간모델링을 통해 MT 주파수 대역에서의 잡음을 예측하고 실제 탐사 자료와 비교분석하여 MT 잡음 모델링을 가능성을 살펴보았다. 수치지도로부터 추출된 잡음원일 가능성이 높은 건물, 도로, 고압 송전선에 의해 발생하는 전자기장의 강도를 지하매질의 전기전도도에 따른 전자기파의 전파 특성을 고려하여 예측하는 잡음모델을 제안하였다. 제안된 잡음모델로부터 예측된 잡음 파워와 실제 탐사를 통해 측정된 MT 자료와의 상관도 분석을 수행한 결과, 전반적으로 전기장에서는 넓은 주파수 대역에서 높은 상관관계를 보이는 반면 자기장은 60 Hz 부근의 대역에서만 상관관계를 가진다. 본 연구에서 제안된 공간모델링을 통한 잡음 예측은 특히 고도로 산업화되어가는 도시 주변지역에서의 MT 탐사를 수행하는데 있어 유용한 정보를 제공할 수 있을 것이다.

• TTA Journal
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• s.138
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• pp.24-29
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• 2011

인류가 전기를 발견한 것은 기원전 600년으로 알려져 있지만 널리 이용할 수 있게 된 것은 불과 200년 안팎이다. 이 짧은 기간에 인류는 과학적 차원을 넘어서 전기공학 뿐만 아니라 전기를 이용하는 전자공학, 통신공학, 제어공학, 컴퓨터공학 분야에서 비약적인 발전을 이끌었으며 지금은 우주선부터 나노 로봇까지 모든 과학, 공학, 생활 분야에서 전기 없는 발전을 기대할 수 없게 되었다. 작은 반도체 소자 내에서의 수 ${\mu}V$회로 구성부터 765kV의 고압 송전망까지 그 형태는 다양하지만, 전기는 전선을 통해 전달되며, 전기의 이용은 곧 전선 인프라의 구축을 의미하고 있다. 전기의 이용에 있어서 필연적인 전선의 남용은 그 도를 넘어서 가정, 직장뿐만 아니라 도로에서도 공해 수준으로 펼쳐져 있고, 이들은 천연 자원의 고갈을 촉진할 뿐만 아니라 잘못 관리되었을 때에는 전기적 쇼크, 화재 등 커다란 재난으로 다가서 기도한다. 무선전력공급 기술은 이러한 전선으로부터의 자유를 추구하는 것으로 소비자가 가장 원하는 기술의 하나이다. 이는 예약된 시장을 말하고 있는 것이며 산업체는 또 다른 산업 기회를 창출할 수 있는 기회를 맞고 있는 것이다. 호언컨대 5년 이내에 대부분의 휴대폰과 노트북 충전기는 무선방식으로 전환될 것으로 보인다. 이번 특집에서는 무선전력공급 기술, 시장, 표준화 동향을 살펴보고 그 응용 개발 및 정책 방향까지 다양한 제언들을 묶어 보았다.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.988-989
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• 2015

본 논문은 저압 직류배전의 시스템에 적용하기 위한 ZVS 방식의 100kW 고강압 DC-DC 컨버터를 제안하고 실험을 통하여 타당성을 검증하였다. 제안된 시스템은 저압 직류배전 설비에 구성되는 시스템으로 1500Vdc가 송전될 때 가정이나 공업용으로 사용 가능한 380Vdc로 강압시켜주는 장치이다. 고압 특성상 하드 스위칭시 손실이 커 ZVS 동작이 가능하도록 구성하였고, 구성된 시스템에 대해 정격 실험 결과 100kW 부하에서 95.8%의 효율을 보였다.

• 전기의세계
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• v.20 no.4
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• pp.31-36
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• 1971

This is intending to introducdine the pipe type 161KV underground cable system in Capital City of Seoul which will be constructed in 1972 or 1973 by Korea Electric Co using the AID loan and Won currency. In order to make readers to have an easy understanding and a clear view of underground cable transmission line, the first part will be for the introduction of the description on future underground cable system by Mr. E.H.F inch appeared on 1969 Sept. Consulatant Engineer. the second part will introduce our 161KV underground cable system in Seoul and it's feasibility study, and the third part will mention calculation methods of electrical properties of pipe type cable and the results of calculation of our own system.