• 한국신재생에너지학회:학술대회논문집
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• 2006.06a
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• pp.329-332
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• 2006

현행 농어촌전화촉진법에 의한 10호이상 도서전화사업이 2006년 말까지 완료될 예정임에 따라 전국적으로 43개에 달하는 10호미만 미전화유인도서 및 벽지지역에 대한 전화사업의 필요성이 제기되었다. 10호미만 도서지역의 전화사업을 위하여 도서전화사업의 기본취지인 전력정책의 보편공급목표를 달성하면서 사회적 경제적비용을 최소화할 수 있는 방법의 채택이 요구되었다 본 연구에서는 대부분의 도서지역이 채택하고 있는 기존의 디젤방식과 최근 활발한 보급이 이루어지고 있는 태양광 풍력 등 신재생에너지에 의한 발전방식의 기술적 옵션에 대한 타당성 분석을 실시하였다. 10호미만 도서지역과 5호미만 벽지지역에 디젤엔진과 태양광 등 신재생에너지를 보급할 경우 발생될 기술적, 경제적 비용의 분석을 실시하였으며 연구 결과 소규모 도서지역과 벽지에서는 태양광이 디젤엔진보다 경제적인 대안으로 판명되었다.

• Journal of Internet of Things and Convergence
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• v.10 no.1
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• pp.1-6
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• 2024

In order to increase the use of electric vehicles (EVs) and minimize grid strain, microgrid using renewable energy must take an important role. Microgrid may use fossil fuels such as small diesel power, but in many cases, they can be supplied with energy from renewable energy, which is an eco-friendly energy source. However, renewable energy such as solar and wind power have variable output characteristics. Therefore, in order to meet the charging and discharging energy demands of electric vehicles and at the same time supply load power stably, it is necessary to review the configuration of electric vehicle charging infrastructure that utilizes diesel power or electric vehicle-to-grid (V2G) as a parallel energy source in the microgrid. Against this background, this study modelized a microgrid that can stably supply power to loads using solar power, wind power, diesel power, and V2G. The proposed microgrid uses solar power and wind power generation as the primary supply energy source to respond to power demand, and determines the operation type of the load's electric vehicles and the rotation speed of the load synchronous machine to provide stable power from diesel power for insufficient generations. In order to verify the system performance of the proposed model, we studied the stable operation plan of the microgrid by simulating it with MATLAB /Simulink.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.15 no.12
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• pp.7451-7458
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• 2014

In this paper, the system modeling and multi-agent control algorithm in isolated wind hybrid power systems are proposed. The multi-agent control is a new type of the hybrid control method that is made up of wind turbine, diesel generator, battery, and dumpload. Fourteen different modes of operations of the wind hybrid power system are performed by wind speed changes and the SOC of battery. Simulation results show that the efficient operations under various wind variations in isolated wind hybrid power systems can be obtained using proposed algorithms.

• Proceedings of the KIPE Conference
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• 2014.11a
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• pp.105-106
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• 2014

본 논문에서는 디젤발전기와 에너지 저장 시스템, 태양광 발전을 이용한 스마트 그린 빌딩의 하이브리드 에너지 시스템을 제안한다. 빌딩 하이브리드 에너지시스템은 다양한 전력원을 가질 수 있는데 기존의 디젤발전기에 화석연료를 저감할 목적으로 풍력발전시스템이나 태양광발전시스템과 같은 형태의 신재생에너지원들이 연계 운전될 수 있다. 연료소모를 최소화하고 디젤발전기의 느린 출력응답특성으로 인한 계통 전압 불안정화를 보상하기 위해 응답특성이 빠른 배터리와 슈퍼커패시터로 이루어진 에너지저장장치와 태양광발전원과의 연계운전 기술을 제안하고 시뮬레이션 하였다.

• Proceedings of the KIPE Conference
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• 2018.07a
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• pp.171-173
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• 2018

섬이나 고립된 지역들은 디젤 발전기를 이용하여 전력 공급을 해왔다. 발전소와 송배전설비 증설에 대한 경제적 문제와 사회적 갈등이 심하기 때문이다. 최근 이러한 비용, 사회 그리고 환경 문제로 인해 에너지 자립섬에 대한 관심이 증가하고 있다. 에너지 자립섬이란, 태양광, 풍력 등 신재생에너지와 배터리를 이용해 필요한 에너지를 스스로 생산하고 사용하는 섬을 말한다. 따라서 디젤 발전기 화석연료 사용량과 유지보수 비용을 줄일 수 있다. 본 논문에서는 상위제어기에 해당하는 EMS(Energy Management System)를 이용해 디젤 발전기, 태양광 PCS(Power Conversion System)와 에너지저장장치(Energy Storage System: ESS)의 유기적인 운영으로 높은 에너지 자립률을 달성한 사례를 소개하고자 한다.

• Proceedings of the KIPE Conference
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• 2014.07a
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• pp.154-155
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• 2014

본 논문에서는 디젤발전기와 ESS(Energy Storage System)를 이용한 스마트 그린 빌딩의 하이브리드 에너지 시스템을 제안한다. 빌딩 하이브리드 에너지시스템은 다양한 전력원을 가질 수 있는데 기존의 디젤발전기에 화석연료를 저감할 목적으로 풍력발전시스템이나 태양광발전시스템과 같은 형태의 신재생에너지원들이 연계 운전될 수 있다. 여기서 디젤발전기의 느린 출력응답특성으로 인한 계통 전압 불안정화를 보상하기 위해 응답특성이 빠른 배터리와 슈퍼커패시터로 이루어진 에너지 저장장치와의 연계운전 기술을 제안하고 시뮬레이션 하였다.

• Journal of Drive and Control
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• v.8 no.1
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• pp.44-49
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• 2011

• 한국신재생에너지학회:학술대회논문집
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• 2009.06a
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• pp.539-541
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• 2009

A severely cold weather condition of King Sejong Station, Antarctica becomes a very severe condition for an installation/operation of wind generation system. When the existing wind generation system works, it may cause a damage and destruction of wind generation system and can bring about big problems in terms of the power quality. Accordingly, it is essential to obtain technologies for the installation and operation of small wind generation system for the polar region's wind generation, and to assess and demonstrate the performance in the severely-cold environment and the polar wind generation system's development, supplementation, alteration. Also, as the available power of King Sejong Station, Antarctica, the diesel generator has been mainly used, and the wind generator has been used in the hybrid form. Wind generation and diesel generation has the different load following control each other. In the wind generation, the generated power very rapidly changes according to the change of the velocity of the wind. On the other hand, the diesel generation shows very gentle change in the velocity of output. Therefore, the study is intended to analyze the 10kw small wind generator-diesel generator's power quality of King Sejong Station, Antarctica, which is the hybrid system installation area.

• Journal of the Korean Solar Energy Society
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• v.32 no.5
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• pp.1-10
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• 2012

This paper proposes a modeling and controller design approach for a wind-diesel hybrid system including dump load. Wind turbine depends on nature such as wind speed. It causes power fluctuations of wind turbine. Excessive power fluctuation at stand-alone power grid is even worse than large-scale power grid. The proposed control scheme for power quality is fuzzy PI controller. This controller has advantages of PI and fuzzy controller. The proposed model is carried out by using Matlab/Simulink simulation program. In the simulation study, the proposed controller is compared with a conventional PI controller. Simulation results show that the proposed controller is more effective against disturbances caused by wind speed and load variation than the PI controller, and thus it contributes to a better quality wind-diesel hybrid power system.

• 한국태양에너지학회:학술대회논문집
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• 2009.04a
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• pp.245-249
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• 2009

Antarctic King Sejong Station was established in King George Island, the South Pole in 1988, and has been executing the monitoring studies on the change of antarctic natural environment. As an available power, the wind energy generator has been used in the form of hybrid with mainly diesel generator. Because the wind generation power sharply changes by wind energy, it must be careful during the system operation. When the power system becomes stable, the output performance of wind energy generator becomes stable. But, in case of unstable system, the errors frequently occur on the wind energy generator and it badly impacts the power system by output of wind energy generator. The purpose of this paper is to analyze suitability while operating the system of 10kW wind energy generator at Antarctic King Sejong Station, an isolated area, and to analyze the problem and improvements by power quality.