• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1130_1131
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• 2009

현재까지 국내 PV시장은 신재생에너지 개발 이용 보급 촉진법을 통해서 태양광발전시스템의 이용 보급의 확대를 목표로 하고 있지만 이에 따른 해결해야할 기술적인 문제점들이 많다. 즉, PV시스템의 성능특성 평가분석은 발전성능에 중대한 영향을 미치는 주요 발생손실을 평가.진단함으로서 손실저감을 통한 시스템의 성능개선, 최적절계, 사후운영관리 및 유지점검 등의 응용기술을 개발하는데 있다. 이러한 기술개발을 위해서는 입력인 태양에너지로부터 PV어레이의 직류출력에서 시스템의 교류출력까지의 성능 및 발생손실에 대해서 정량적인 값으로 나타낼 필요가 있다. 본 논문에서는 태양광발전 설비의 효율에 관한 파라미터인 위도와 경도, 온도 및 일사량, 시스템 구성요소에 대한 세부적인 기술검토와 태양광발전시스템의 효율을 개선시킬 수 있는 파라미터에 접근하기 위해 정확한 시스템의 운전특성을 분석 하고자 한다.

• Proceedings of the KIEE Conference
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• 2004.04a
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• pp.212-214
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• 2004

As the maximum power operating point(MPOP) of photovoltaic(PV) power generation systems changes with changing atmospheric conditions such as solar radiation and temperature, an important consideration in the design of efficient PV system is to track the MPOP correctly. Many maximum power point tracking(MPPT) techniques have been considered in the past, however, techniques using microprocessors with appropriate MPPT algorithms are favored because of their flexibility and compatibility with different PV arrays. Although the efficiency of these MPPT algorithms is usually high, it drops noticeably in case of rapidly changing atmospheric conditions. This paper analysed and researched the characteristics of three MPPT algorithms; P&O, Inc&Cond, ImP&O and simulated them with irradiance changing.

• Proceedings of the KIEE Conference
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• 2015.07a
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• pp.950-951
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• 2015

This paper proposes MPPT control considering temperature characteristic of PV module. Conventional CV(Constant Voltage) and PO(Perturbation and Observation) methods have the weak problem about the insolation and temperature change. Thus, in this paper, in order to improve this problem, the optimal voltage and current is determined and the MPPT control is performed. MPPT algorithm proposed in this paper analyze the performance about insolation and temperature change and proves the validity.

• Proceedings of the KIPE Conference
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• 2003.07b
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• pp.925-928
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• 2003

As the maximum power operating point(MPOP) of photovoltaic(PV) power generation systems changes with changing atmospheric conditions such as solar radiation and temperature, an important consideration in the design of efficient PV system is to track the MPOP correctly. Many maximum power point tracking(MPPT) techniques have been considered in the past, however, techniques using microprocessors with appropriate MPPT algorithms are favored because of their flexibility and compatibility with different PV arrays. Although the efficiency of these MPPT algorithms is usually high, it drops noticeably in case of rapidly changing atmospheric conditions. This paper proposed a new MPPT algorithm based on perturb & observe(P&O) algorithm with experiment. The results shows that the new P&O algorithm has successfully tracked the MPOP, even in case of rapidly changing atmospheric conditions, and has higher efficiency than ordinary algorithms.

• Proceedings of the KIPE Conference
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• 2010.07a
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• pp.216-217
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• 2010

This paper presents a new software-based on-line dead-time compensation technique for single-phase grid-connected photovoltaic (PV) inverter system. To improve the mitigation of dead-time effect around the zero-crossing point of phase current, a selective harmonic elimination of instantaneous feedback current is used as an additional part of conventional current control scheme. Simulation and experimental results are shown to verify the effectiveness of proposed compensation method in the grid-connected power distributed generation systems.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.50 no.3
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• pp.109-116
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• 2001

In this paper, we adapted BLDC motor to PV water pumping systems to maintain high efficiency in the wide speed area. Also, to design confidence we adapted the vector control that drive the maximum torque at each speed limit. We designed optimal gain value of current, speed and pressure PI controller. Inverter gate pulse used Space Vector PWM to reduce torque pulsation of BLDC motor. According to, it was improve general matters of high water storage tank method by direct water supply pumping method.

• 한국신재생에너지학회:학술대회논문집
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• 2006.06a
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• pp.138-141
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• 2006

The application of photovoltaics into building as integrated building components has been paid more attention worldwide. Photovoltaics or solar electric modules are solid state devices, directly converting solar radiation into electricity; the process does not require fuel and any moving parts, and produce no pollutants. And the prefab building method is very effective because the pre-manufactured building components is simply assembled to making up buildings in the construction fields especially the sandwich panel. So, the purpose of this research is to integrated prefab building materials depending on the cooling type of PV modules. It is concluded that the prediction of BIPV system's performance should be based on the more accurate PV module temperature. From the basis of these results on the correlation of temperature and irradiation were obtained.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2008.05a
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• pp.411-414
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• 2008

In this paper a novel tracking system is described, regarding the influence of shadow between array, aimed at improving the efficiency of PV tracking system. The loss by influence of those shadow can be compensated for by means of control algorithm of the tracking device. The paper suggests a method controlling an altitude for length which is received the shadow influence of PV array. By using an azimuth of current solar position and the length between arrays, the controller of tracking device is able to calculate the length between actual arrays and make a comparison of the shadow length at a specific time with the length between arrays. In the paper, we develop the control algorithm able to minimize the loss caused by the influence of shadow on the PV tracking system, and compared this with conventional output system. The controller has been tested in the laboratory with proposed algorithm and shows excellent performance

• The Transactions of the Korean Institute of Electrical Engineers B
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• v.52 no.6
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• pp.291-297
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• 2003

This paper presents a current-source-inverter based on a buck-boost configuration and its application for residential photovoltaic system. The proposed circuit has five switches. Among them, only one switch acts as chopping, and the other determine the polarity of output; therefore, it can reduce the switching loss. Because the input inductor current is operated on the discontinuous conduction mode, high power factor can be achieved without additional input current controller. So the overall system shows a simple structure. The operational modes are analysed in depth, and then it was verified through the experimental results using a 150 [W] prototype equipped with digital signal processor TMS320F241.

• Proceedings of the KIPE Conference
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• 2003.07b
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• pp.929-932
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• 2003

Recently, energy Problem has become more important thing than that of past years. Therefore, researchers in many countries are trying to find the solution for removing energy Problem. One of all is the power generation with using the photovoltaic system. Because this system has some advantage, like purity and infinity. However, there are some problems to generate electrical power with using photovoltaic system. That problems, taking up a very big space and taking financial worries, come into existence. So it is inevitable to make the visual implement equipment for doing repetition experiment and solving this problems. In this paper, Boost converter are analyzed and simulated to make high power PV virtual implement system as input source instead of using transformer.