• 대한전기학회:학술대회논문집
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• 대한전기학회 1993년도 하계학술대회 논문집 A
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• pp.144-147
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• 1993

The long-term electricity resource planning of electric utility has undergone significant change during the past decade. The current resource planning can be considered as multi-objective decision making procedure under the various uncertainties such as demand growth, construction cost, fuel price, environmental regulation, plant site, financial adequacy, new technology advent and so on. This paper presents a standardized electricity resource planning scheme using the strategic planning concept. EGEAS computer model was fully applied to indentify feasible alternative plans and simulate various attribute values corresponding each alternative plan and future. As a case study, a hypothetical long-ten capacity expansion planning problem is analyzed.

• Journal of Electrical Engineering and Technology
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• 제5권1호
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• pp.1-7
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• 2010

Recently, smart grid has been considered a very important new energy delivery technology, and one that can help ensure a cleaner environment by making use of information and communication technology (ICT) in countries around the world. The many technological benefits smart grid offers is expected to bring about a huge change in the electric energy supply chain. In particular, smart grid with advanced ICT is likely to allow market agents to participate in the decision-making process in the restructured electricity industry, easily facilitating Homeostatic Utility Control. In this paper, we examine smart grid as a market externality, and then illustrate issues from the commercial market perspective as it relates to electricity market design. Finally, our paper identifies some of the impacts of smart grid on electricity market design, which may possibly be incorporated into the evolution of the electricity market, thus ensuring market efficiency.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2003년도 학술대회논문집
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• pp.269-272
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• 2003

The importance of the improving quality of electric power is being strongly raised, owing to an increasing use of sensitive and small-sized electronic devices and system. The transient overvoltage on low-voltage AC power distribution system are induced by direct or indirect lightning return strokes, and those can cause damage and/or malfunction of the utility system for borne automation, office automation and factory automation as well as medical equipments. The behavior of lightning surge transferred to the primary side from the primary side in distribution transformers were experimentally investigated the protection effect of low voltage SPD installed at the secondary side of distribution transformers was analyzed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.1099-1101
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• 2007

In this paper, a study has been performed for development of dynamic voltage restorer(DVR) system using EDLC (Electric Double Layer Capacitor) to solve voltage sags which are considered the dominant disturbances affecting power quality. With the prolific use of semiconductor devices in electrical equipment, modern-day loads are becoming increasingly sensitive to the sags and the disturbances prove to be costly to industries. As a technology-driven custom power installation, the Dynamic Voltage Restorer (DVR) is recognized to be most effective equipment that can be used to counter the voltage sag problem. Hence, this paper proposes the high-performance optimal design of On-Line type DVR system which can efficiently compensate the instantaneous voltage sag and instantaneous interruption of the utility voltage source.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 추계학술대회 논문집 전력기술부문
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• pp.155-157
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• 2004

Voltage control and stability problems are very important in the electric utility industry. But there is no voltage stability analysis program which has reliability as commercial program in domestic. We are developing a practical voltage stability analysis program. In this paper, we will study the existing commercial program and then discuss design of practical analysis tool.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 추계학술대회 논문집 학회본부A
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• pp.292-294
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• 1998

It is very important for electric utility to expand generating facilities and transmission equipments in accordance with the increase of electricity demand. Regional electricity demand forecasting is among the most important step for long-term investment and power supply planning. The main objectives of this paper are to develop the methodologies for forecasting regional load demand. The Model consists of four models, regional economy, regional electricity energy demand, areal electricity energy demand. and areal peak load demand. This paper mainly suggests regional electricity energy demand model and areal peak load demand. A case study is also presented.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2009년도 추계학술대회
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• pp.720-722
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• 2009

경제 성장에 따른 국내 산업분야의 발달 및 국민 생활수준의 향상으로 전력 소비가 지속적으로 증가하고 있다. 전력을 안정적으로 공급하기 위해서는 전력 수요에 대한 중 단기 예측이 중요하며, 정확한 예측에 따라 안정적인 수급 계획을 확립할 수 있다. 본 논문에서는 부산시에서 공급되는 부산지역의 전력 데이터와 기후 관련 자료를 1995년 1월부터 2007년 12월까지의 측정치를 가지고 시계열 데이터를 수집하여 분석하고 신경회로망의 구조를 설계하여 실험을 통하여 실제 데이터와 예측 데이터를 비교 분석하고 평가한다.

• 항공우주시스템공학회지
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• 제14권6호
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• pp.10-17
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• 2020

The Korean medical evacuation helicopter was developed based on the Korean Utility Helicopter (hereafter referred to as 'Surion'). It uses an auxiliary power unit and engine for heating during winter operation. The helicopter maintains the internal temperature of the aircraft using its bleed air to satisfy its operational capability. However, due to the air inflow through the gap between the aircraft skin and door, additional heating for operating the portable medical equipment and preventing hypothermia in evacuated patients is required. Accordingly, an electric auxiliary heater was developed for additional heating during winter operation, and environmental, durability, and performance tests were conducted per MIL-STD-810G and MIL-STD-461F. The auxiliary heater was verified per the tailored airworthiness certification criteria.

• 한국재난정보학회:학술대회논문집
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• 한국재난정보학회 2023년 정기학술대회 논문집
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• pp.175-177
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• 2023

본 연구는 코로나19 대응을 위한 업무연속성계획의 가동 경험을 분석하여 체계를 개선한 내용을 다루고 있다. 코로나19는 전 세계적으로 팬데믹을 일으킨 대유행병으로, 감염병 확산으로 인한 위기 상황에서 업무연속성을 확보하는 것이 중요하다. 전력에너지 공기업은 위기대응 체계를 구축하고 필수 대응 사례를 분석하여 업무연속성을 유지하는 방안을 모색하였다. 이를 위해 근무환경 분리, 핵심인력 확보, 비상대응 업무계획 수립 등 다양한 대책을 시행하였다. 코로나19 상황에서 전력에너지 공급업무의 연속성 확보를 위한 이러한 대책들은 효과적으로 시행되었고, 감염병 재난관리에 대한 매뉴얼로 활용하고 있다.

• 한국표면공학회지
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• 제57권1호
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• pp.31-37
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• 2024

The surge in demand for lithium is primarily fueled by the expanding electric vehicle market, the necessity for renewable energy storage, and governmental initiatives aimed at achieving carbon neutrality. This study proposes a straightforward method for lithium extraction utilizing cellulose nanofiber (CNF) via a vacuum filtration process. This approach yields a porous CNF film, showcasing its potential utility as a lithium extractor and indicator. Given its abundance and eco-friendly characteristics, cellulose nanofiber (CNF) emerges as a material offering both economic and environmental advantages over traditional lithium extraction techniques. Hence, this research not only contributes to lithium recovery but also presents a sustainable solution to meet the growing demand for lithium in energy storage technologies.