• Proceedings of the KIEE Conference
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• 1997.07f
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• pp.1942-1944
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• 1997

This paper presents a 10kW stand-alone photovoltaic power generation system with uninterruptible power system facility and its simple topology. The system s based on a DC/DC converter for a photovoltaic energy conversion, a four switch IGBT PWM inverter, a battery, and DSP controller.

• Proceedings of the KIEE Conference
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• 1997.07f
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• pp.1939-1941
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• 1997

In this paper, we simulated the performance of the Cheaju island and developed the hybrid power system based on a least component size design option. This paper performed simulation of economic relation of battery and diesel generation in hybrid power system component.

• 한국신재생에너지학회:학술대회논문집
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• 2008.05a
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• pp.431-431
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• 2008

• Journal of the Korean Ceramic Society
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• v.28 no.4
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• pp.279-288
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• 1991

KIST/CARES reliability analysis program was used to calculate failure probabilities of piston pin and poppet valve. The 4-point bending test was performed on Sin/Hip Si3N4 for obtaining material parameters such as m, $\sigma$o, and KB, and the finite element analysis was performed using MSC/NASTRAN for obtaining stress distribution. The calculated failure probability of piston pin was lower than 10-6 and the failure probaility of poppet valve was greater than 0.95.

• Proceedings of the KIPE Conference
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• 1999.07a
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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.

• Proceedings of the Korea Society for Energy Engineering kosee Conference
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• 1993.05a
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• pp.47-52
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• 1993

Recently, as exactly clean source, the research of photovoltaic power generation is undertaken actively and widely. In this paper, an auxiliary power supply system which is composed of photovoltaic generation and DC-DC boost chopper is described. This system in mainly for Air-conditioner appliances is which AC source is formed through rectifying circuit and without electrical storage battery. There exist two operating modes depending on the power quantity of the solar cells and the load. The control algorithm is discussed.

• Proceedings of the Materials Research Society of Korea Conference
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• 2005.05a
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• pp.202-202
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• 2005

• Proceedings of the KIPE Conference
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• 1998.07a
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• pp.100-102
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• 1998

In recent years, for the viewpoint of environment and electric power demand for stable secure, new energy such as photovoltaic system (PV) become increasingly popular. In case of interconnecting PV to the commercial electric company, two problems will occur when operating in isclation with the other general consumers. One is doing harm to the power quality. And the other is the security problem caused by charching a part of commercial system line that has to be no voltage. In this paper, a simple modelling of distribution system and grid-connected PV system and simulation result were proposed.

• Proceedings of the KIEE Conference
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• 1990.07a
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• pp.372-375
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• 1990

A sinusoidal PWM type inverter using 1GBT and a new instantaneous current tracking control stategy is described. Its utilization as an interface for a grid-connected photovoltaic system with maxmum power tracking capability is explaned, and competer simulation along with waveforms are discussed. Finally, experimental results are analysed by state space avarge method to actual grid-connected systems.

• Proceedings of the KIEE Conference
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• 1990.07a
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• pp.401-404
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• 1990

A new control method of solar cell output using PWM chopper is described. Theoretical analysis and comparision for all sorts of system are also discussed for improving photovoltic system efficiency. It is expected that the result of this study will be utilized to some other DC or AC application equipments.