• 전력전자학회:학술대회논문집
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• 전력전자학회 1999년도 전력전자학술대회 논문집
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• pp.419-422
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• 1999

This paper deals with stand-alone Photovoltaic system(SPVS) with charger/discharge controller. Main power source of SPVS are generally solar cel and battery. Therefore SPVS can be classified into variable types in accordance with connection type between battery and solar cell. SPVS with charger/discharge controller which can operate solar cell a maximum power point is suggested and designed with instantaneous controller. And system operating characteristics are verified by experiment with a laboratory prototype in this paper.

• 한국산업정보학회논문지
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• 제16권1호
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• pp.31-36
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• 2011

유비쿼터스 네트워크와 더불어 무선 센서 네트워크는 다양한 분야에 응용되고 있다. 무선 센서 네트워크의 노드들은 목표 지역에 비치되어 동작하게 되는데 그 공급원으로 대부분 배터리를 사용하고 있다. 배터리는 센서 네트워크의 응용에 제한된 에너지를 가짐으로써 교체나 충전 등의 어려움을 가진다. 따라서 센서노드의 수명을 연장시키기 위해 주변 환경으로부터의 에너지 하베스팅 기술 등이 연구 개발되고 있다. 특히 태양에너지는 다른 환경 에너지에 비하여 방대하고 짧은 시간에 많은 에너지를 얻을 수 있어 최근 널리 연구되어지고 있다. 본 연구에서는 Solar Cell을 이용하여 배터리 충전 및 센서노드를 구동하는 실험을 하고, 수집된 데이터와 배터리의 전압에 대한 분석을 통하여 센서노드를 구동하기 위해 필요한 배터리 충전시간과 센서노드 농작 가능성에 대하여 확인하였다.

• Journal of Electrical Engineering and Technology
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• 제12권6호
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• pp.2138-2145
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• 2017

A hybrid system combining renewable technologies with diesel generators is a promising solution for rural electrification. Myanmar has many renewable energy resources, and many regions that cannot be supplied with electricity from the main grid. Therefore, in this study, we select a village in Myanmar, which is located far away from the substation, and evaluate the economic feasibility of a hybrid system for the village considering the specific local conditions and resource availability. We consider a hybrid system composed of a photovoltaic source, diesel generator, battery energy storage system, and converter. The load profiles of the household data from the village, and the solar radiation profiles are determined. The advantages of the hybrid system, in terms of cost, reliability, and environmental effects are analyzed through simulations using commercial software. The simulation results show that, for the selected village in Myanmar, a hybrid system with battery energy storage can reduce the cost and greenhouse gas emissions while maintaining reliability. We also obtain an optimized design in terms of the component size for the selected hybrid system with battery energy storage.

• Journal of Power Electronics
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• 제16권2호
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• pp.666-674
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• 2016

In this paper, a high efficiency satellite electrical power supply system is proposed. The increased efficiency of the power supply system allows for downscaling of the solar array and battery weight, which are among the most important satellite design considerations. The satellite power supply system comprises two units, namely a generation unit and a storage unit. To increase the efficiency of the solar array, a maximum power point tracker (MPPT) is used in the power generation unit. In order to improve the MPPT performance, a novel algorithm is proposed on the basis of the hill climbing method. This method can track the main peak of the array power curve in satellites with long duration missions under unpredicted circumstances such as a part of the array being damaged or the presence of a shadow. A lithium-ion battery is utilized in the storage unit. An algorithm for calculating the optimal rate of battery charging is proposed where the battery is charged with the maximum possible efficiency considering the situation of the satellite. The proposed system is designed and manufactured. In addition, it is compared to the conventional power supply systems in similar satellites. Results show a 12% increase in the overall efficiency of the power supply system when compared to the conventional method.

• 한국정보전자통신기술학회논문지
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• 제4권4호
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• pp.258-263
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• 2011

본 논문에서는 추적식 태양광 발전 시스템을 위한 고품위 축전지 충방전 컨트롤러를 설계하였다. 제안하는 컨트롤러는 태양광 발전시스템에 일반적으로 사용하는 납산축전지(연축전지)뿐만 아니라 향후 개발되어 신 재생에너지 발전 시스템에 사용될 다양한 배터리를 충전하는데 적합하도록 미세 전류조절기능을 갖춘 새로운 기능을 갖는 컨트롤러이다. 사용자 편의성을 높이기 위하여 LCD 표시기의 기능을 보강하였으며 CAD를 이용한 최적설계를 통하여 대기 전력의 최소화를 구현하였다.

• 한국태양에너지학회 논문집
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• 제31권4호
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• pp.122-127
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• 2011

A bee venom is very useful and expensive medical resource. A bee venom collector has some difficulties and inconveniences because of its complex component. This is used normal battery as an electric power. However, using the solar cell of the bee venom collector reduces economic burden and guarantees high efficiency. We have performed comparative experiment between the bee venom collector to use battery and the one to use solar cell(polycrystalline silicon) by collecting the bee venom simultaneously. At the same electricity, the electric frequency(AC),312 Hz is more superior than 450Hz. This paper verified through the experiments that the bee venom collector to adopt solar cell is more effective than normal collector.

• 전기학회논문지
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• 제67권1호
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• pp.38-45
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• 2018

In September 2016, the government decided to apply a REC 5.0 weighting to solar-battery ESS to increase the supply of renewable energy. In this paper, we calculated the optimal capacity of battery ESS which maximizes the revenue when solar is linked with battery ESS. In the case study, the optimal capacity was calculated by applying the conservative REC price, and we studied sensitivity analysis about battery price and real-time REC price.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 1998년도 학술발표회논문집
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• pp.166-169
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• 1998

This paper represent about design of the controller for battery of fence with traffic controller for battery of fence with traffic auxiliary system for power supply using solar cell. Simulation is represents V-I and power characteristic by Pspice. This system is successfully operating with high clearness lights.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2001년도 전력전자학술대회 논문집
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• pp.81-84
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• 2001

In the power system of a satellite, solar array and a battery have directly impact on the life time of the satellite, and their stable operation is decided by whether their states are in the steady state operation or not. In this study, solar array capacity and battery characteristics of proposed communication satellite are designed and simulation is conducted according to the operation mode. Each operation mode is classified as the normal and worst case modes, respectively. The normal mode is analyzed under daylight and the eclipse with the EHT burn, and the worst case modes which have solar cell circuit failure, and battery cell failure are analyzed too.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2009년도 춘계학술대회 논문집
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• pp.168-171
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• 2009

The solar lighting system has been popular in these days. It is composed of solar panel, controller, and battery. The battery is charged during the day time, and discharged at the night time. The battery status should be carefully controlled in order to guarantee the safe operation. If there were measurement noise or system noise, the performance of controller could be degraded. In this paper, the state estimator design in the noisy environment is proposed. The proposed system shows the excellent tracking performance under in harsh conditions.