• 한국산학기술학회논문지
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• 제12권2호
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• pp.920-926
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• 2011

본 논문에서는 신재생에너지 활용을 위한 다중 추적식 태양광 발전 감성형 LED 가로등을 제안한다. 제안하는 가로등 시스템은 다중 추적방식의 태양광 추적기능을 갖추고 있고 감성형 고품위 LED 램프와 제어회로를 사용하여 센서를 통해 입력되는 온도 및 습도를 기반으로 최대의 일조량을 받을 수 있도록 하였다. 신재생에너지 활용의 핵심 요소인 효율적인 축전지 활용을 위해 충방전 컨트롤러를 개발하였고 원격모니터링 기능 및 제어기능도 구현 하였다. 제안하는 가로등 시스템은 기존 기술에 비하여 추적 동작이 우수하고 에너지효율이 향상되었으며 기존에 개발되지 않았던 추적식 태양광 발전 시스템과 감성형 LED를 결합함으로써 차세대 가로등 시스템의 모델로서의 활용될 수 있게 하였다.

• 대한조선학회논문집
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• 제53권4호
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• pp.290-299
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• 2016

The most powerful energy resource in nature is solar energy which becomes directly converted to electric power in worldwide. Most of the photovoltaic power plants are commonly installed on sunny side of the ground. Thus the installation of photovoltaic power plant could produce an unexpected adverse effect by sacrificing the productivity from green field or forest. To avoid these adverse effect floating photovoltaic plant has been devised and installed on inland reservoir. The photovoltaic plant could utilize ignored water surface without sacrificing the productivity of the ground. Additionally the photovoltaic efficiency has been reenforced by the cooling effect induced by the circulating air flow from water surface. The floating photovoltaic plant could be furnished solar tracking ability by tilting the system operated with the aid of the ballast system. This report is provided to introduce the design of the floating structure with solar panel which furnished solar tracking ability with the aid of ballast system.

• 반도체디스플레이기술학회지
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• 제11권3호
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• pp.27-31
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• 2012

This paper presents a study on the design of photovoltaic system with reversal tracking reflector. The reversal tracking reflector is conceptually designed by using TRIZ. The 20 to 30% of incident rays cannot produce the current and reflected back to the glass surface because of high refractive index of solar cell which are produced from Si, GaAs. The solution of this problem has been derived using 6SC(6 steps creativity)TRIZ. The reflector which has the actuator can be trackback the sun. Reversal tracking reflector which mounted on the top of the system prevents the shadowing loss and improve the efficiency of track back function. The anti-glare reflector prevents the heat due to the concentrated reflected light rays.

• 제어로봇시스템학회논문지
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• 제16권7호
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• pp.711-719
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• 2010

Heliostat, as a concentrator reflecting the incident solar energy to the receiver located at the tower, is the most important system in the tower-type solar thermal power plant, since it determines the efficiency and performance of solar thermal plower plant. Thus, a good sun tracking ability as well as its good optical property are required. In this paper, we propose a method to compensate the heliostat sun tracking error. We first model the sun tracking error, which could be measured using BCS (Beam Characterization System), by multilayered neural network. Then the extended Kalman filter was employed to train the neural network. Finally the model is used to compensate the sun tracking errors. Simulated result shows that the method proposed in this paper improve the heliostat sun tracking performance dramatically. It also shows that the training of neural network by the extended Kalman filter provides faster convergence property, more accurate estimation and higher measurement noise rejection ability compared with the other training methods like gradient descent method.

• 한국태양에너지학회 논문집
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• 제30권6호
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• pp.118-124
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• 2010

In order to develop commercial model of 10kW dish-Stirling solar thermal power system, modification for the exiting facility was taken for a year as a Leading Project in KIER. During the project, solar tracking system, control and monitoring system and high durability reflector were developed and long term operation were performed. The solar tracking system was tested for four months to investigate the degree of precision and adapted to the control system for an actual operation from October in 2009. The sun tracking accuracy of ${\pm}4$ mrad using modified control system was obtained and the system operated successfully during the experimental period. The monitoring system displays engine pressure, electric generation amounts, generator RPM, receiver temperatures, and etc. from Stirling engine and weather data of Direct Normal Irradiation, Horizontal Global Insolation, wind speed & direction, and atmosphere temperature from weather station. According to the operating results in a clear sky day, electric power of 6,890 W was generated at the DNI value of 850 W/$m^2$ and the averaged solar-to-electricity efficiency during a whole day reached to 18.99%. From the overall operating results, linear power generation trend could be observed with increasing DNI value. The solar-to-electricity efficiency achieved to 19% around the DNI value of 700 W/$m^2$ and increased to 20% when the DNI value goes up to 900 W/$m^2$.

• 한국태양에너지학회 논문집
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• 제29권1호
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• pp.38-43
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• 2009

In this paper. a prototype of a mobile Sun tracking system is proposed. The proposed system uses 2-axis tilt sensor and 3-axis magnetic sensor to measure the orientation and the posture of the system according to the horizontal system of coordinates, which are used to compensate the slope effects. Then through astronomical calculation using the time and position information obtained by GPS sensor the azimuth and altitude of the Sun from that location is calculated. The position of the Sun is converted to that of the mobile Sun tracking system coordinates and used to control A-axis and C-axis of the system.

• 태양에너지
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• 제18권3호
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• pp.25-30
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• 1998

PTC용 태양추적장치는 최대 집열을 위하여 PTC를 항상 태양광이 입사되는 방향으로 일치시키기 위한 자동제어시스템이다. 본 연구는 마이크로프로세서를 사용하는 PTC용 1축 태양추적장치의 개발에 관한 것이다. 개발된 태양추적장치는 태양 위치를 판별하는 태양 센서와 DC 모터 위치제어기로 구성되어 있으며, 80c196KC를 사용하는 제어장치는 아날로그 입력 장치, 24V DC 서보모터제어기, 디지털 I/O로 구성되어 있다. 태양센서는 photodiode를 사용하여 제작되었으며, 태양센서의 법선 방향으로부터 ${\pm}50^{\circ}$ 이내에 위치하는 태양을 감지할 수 있도록 설계되었다. 본 연구에서 개발된 태양추적장치는 현재 한국에너지기술연구소에 설치되어 있는 PTC에서 사용되고 있으며, 태양추적 정확도에 관한 연구가 현재 진행되고 있다.

• 한국산학기술학회논문지
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• 제21권7호
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• pp.212-217
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• 2020

태양광 발전 시스템은 태양광 패널을 통해 발전된 전력을 계통연계를 통해 전송하는 종합 시스템이다. 발전량을 증대시키는 기술로써 태양광 입사각을 변화시켜 발전량을 증대시키는 추적식 태양광 발전장치 기술이 있다. 본 논문은 입사각을 변화시켜 발전량을 증대시키는 단축 추적식 태양광 발전장치의 구조물과 제어에 관한 연구이다. 핵심 내용은 태양광 구조물이 남북축을 중심으로 동서 방향으로 축회전하도록 구성한 단축 제어장치 및 기술이다. 일출로부터 일몰까지 동서방향으로 태양을 추종하는 태양광 구조물은 구조적 안정성과 태양광 추종 제어 성능 확보가 필요하다. 단축 추적 발전장치는 최대 25% 이상의 발전량 증대를 기대할 수 있다.

• Journal of international Conference on Electrical Machines and Systems
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• 제3권4호
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• pp.472-480
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• 2014

The In solar power system, the height and azimuth of the sun are important parameters which control generated power magnitude. The tracking method that controls the daily generation magnitude according to latitude and longitude using the two axles is often used in the existing sunlight tracking system today. In this two-axle PV track control system, the self-load is concentrated on one FRAME. It is influenced of the regular load, snow load and the wind load, etc. It is difficult to set up the system in the conventional building. This research is a development about the small-scale economy track device of independent load-dispersing solar generation system. The position tracking algorithm is through new coordinates transformation calculating the height and azimuth of the sun.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2007년도 하계학술대회 논문집
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• pp.86-88
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• 2007

In solar power system, the height and azimuth of the sun are important parameters which control generated power magnitude. The tracking method that controls the daily generation magnitude according to latitude and longitude using the two axles is often used in the existing sunlight tracking system today. In this two-axle PV track control system, the self-load is concentrated on one FRAME. It is influenced of the regular load, snow load and the wind load, etc. It is difficult to set up the system in the conventional building. This research is a development about the small-scale economy track device of independent load-dispersing solar generation system. The position tracking algorithm is through the new coordinates transformation calculating the height and azimuth of the sun.