본 논문에서는 태양광 발전시스템을 이용한 승압 초퍼와 전압형 PWM(Pulse Width Modulation) 인버터인 전력변환기로 구성하였고, 안정된 변조를 위해서 동기신호와 제어신호를 원칩 마이크로프로세서에 의해서 처리하였다. 전력비교에 따라 시간 비율을 변화시키지만 태양전지는 전형적인 수하특성을 갖고 있어, 일사량과 온도변화에 관계없이 항상 최대 출력점을 추적하도록 승압초퍼를 제어하였다. 또한 PWM 전압형 인버터는 태양전지가 연속 발전할 수 없는 단점을 보완하기 위해 일반 상용전원과 연계함으로써 약 $10{\sim}20[%]$ 전력절감효과를 얻을 수 있는 에너지절약 전원 복합형 전력변환장치로 구성하였다. 그리고 태양광 발전의 효율을 높이기 위하여 센서와 마이크로프로세서를 이용한 태양광위치추적 장치를 설계하여 고정방식의 태양광 발전에 대하여 비교해 보았다. 그 결과, 태양광 위치추적장치는 고정방식의 태양광 발전에 비해 5% 정도 개선됨을 알 수 있었다. 또한, PWM 전압형 인버터와 위상동기를 위해서 계통전압을 검출하여 계통전압과 인버터 출력을 동상 운전하므로 잉여전력을 계통과 연계할 수 있게 하였다. 그리고 고역율과 저고조파 출력을 유지함으로서 부하와 계통에 전력이 안정하게 공급될 수 있도록 제어하였다.
본 논문에서는 태양광 발전시스템을 이용한 승압 초퍼와 전압형 PWM(Pulse Width Modulation) 인버터인 전력변환기로 구성하였고, 안정된 변조를 위해서 동기신호와 제어신호를 원칩 마이크로프로세서에 의해서 처리하였다. 전력비교에 따라 시간 비율을 변화시키지만 태양전지는 전형적인 수하특성을 갖고 있어, 일사량과 온도변화에 관계없이 항상 최대 출력점을 추적하도록 승압초퍼를 제어하였다. 또한 PWM 전압형 인버터는 태양전지가 연속 발전할 수 없는 단점을 보완하기 위해 일반 상용전원과 연계함으로써 약 $10{\sim}20[%]$ 전력절감효과를 얻을 수 있는 에너지절약 전원 복합형 전력변환장치로 구성하였다. 그리고 태양광 발전의 효율을 높이기 위하여 센서와 마이크로프로세서를 이용한 태양광위치추적 장치를 설계하여 고정방식의 태양광 발전에 대하여 비교해 보았다. 그 결과, 태양광 위치추적장치는 고정방식의 태양광 발전에 비해 5% 정도 개선됨을 알 수 있었다. 또한, PWM 전압형 인버터와 위상동기를 위해서 계통전압을 검출하여 계통전압과 인버터 출력을 동상 운전하므로 잉여전력을 계통과 연계할 수 있게 하였다. 그리고 고역율과 저고조파 출력을 유지함으로서 부하와 계통에 전력이 안정하게 공급될 수 있도록 제어하였다.
In this paper, a photovoltaic system is designed with a step up chopper and single phase PWM(Pulse Width Modulation) voltage source inverter. Where proposed Synchronous signal and control signal was processed by one-chip microprocessor for stable modulation. The step up chopper operates in continuou...
In this paper, a photovoltaic system is designed with a step up chopper and single phase PWM(Pulse Width Modulation) voltage source inverter. Where proposed Synchronous signal and control signal was processed by one-chip microprocessor for stable modulation. The step up chopper operates in continuous mode by adjusting the duty ratio so that the photovoltaic system tracks the maximum power point of solar cell without any influence on the variation of insolation and temperature because solar cell has typical voltage and current dropping character. The single phase PWM voltage source the inverter using inverter consists of complex type of electric power converter to compensate for the defect, that is, solar cell cannot be developed continuously by connecting with the source of electric power for ordinary use. It can cause the effect of saving electric power. from 10 to 20[%]. The single phase PWM voltage source inverter operates in situation that its output voltage is in same phase with the utility voltage. In order to enhance the efficiency of photovoltaic cells, photovoltaic positioning system using sensor and microprocessor was design so that the fixed type of photovoltaic cells and photovoltaic positioning system were compared. In result, photovoltaic positioning system can improved 5% than fixed type of photovoltaic cells. In addition, I connected extra power to the system through operating the system voltage and inverter power in a synchronized way by extracting the system voltage so that the phase of the system and the phase of single-phase inverter of PWM voltage type can be synchronized. And, It controlled in order to provide stable pier to the load and the system through maintaining high lurer factor and low output power of harmonics.
In this paper, a photovoltaic system is designed with a step up chopper and single phase PWM(Pulse Width Modulation) voltage source inverter. Where proposed Synchronous signal and control signal was processed by one-chip microprocessor for stable modulation. The step up chopper operates in continuous mode by adjusting the duty ratio so that the photovoltaic system tracks the maximum power point of solar cell without any influence on the variation of insolation and temperature because solar cell has typical voltage and current dropping character. The single phase PWM voltage source the inverter using inverter consists of complex type of electric power converter to compensate for the defect, that is, solar cell cannot be developed continuously by connecting with the source of electric power for ordinary use. It can cause the effect of saving electric power. from 10 to 20[%]. The single phase PWM voltage source inverter operates in situation that its output voltage is in same phase with the utility voltage. In order to enhance the efficiency of photovoltaic cells, photovoltaic positioning system using sensor and microprocessor was design so that the fixed type of photovoltaic cells and photovoltaic positioning system were compared. In result, photovoltaic positioning system can improved 5% than fixed type of photovoltaic cells. In addition, I connected extra power to the system through operating the system voltage and inverter power in a synchronized way by extracting the system voltage so that the phase of the system and the phase of single-phase inverter of PWM voltage type can be synchronized. And, It controlled in order to provide stable pier to the load and the system through maintaining high lurer factor and low output power of harmonics.
Sakutaro Nonaka, "A Suitable Single-phase PWM Current Source Inverter for Utility Interactive Photovoltaic Generation System, " JIEE. Vol. 114. No. 6. pp. 631-637, 1994.
Sakutaro Nonaka," A Novel Single-phase Sinusoidal PWM Voltage Source Inverter and its Application for Residential Photovoltaic Power Generation System," JIEE, Vol. 115, No. 2, pp. 115-118, 1995.
根菓 保彦, 東 眞喜夫, 作太郞, "系統連系陽光發電システムの最大出力点追慫制御," 平成7年日本電氣學會全國大會 講演論文集, No. 753, pp. 124, Mar. 1995.
D. M. Bord and D. W. Novotny, "Current Control of VSI PWM Inverters," IEEE Trans. on ind. Appl., Vol. 1A-21, No. 4, pp. 769-775, 1984.
G. Franzo, M. Mazzucchelli, L. Puglisi, and G. Sciutto, "Analysis of PWM Techniques using Uniform Sampling in Variable-speed Electrical Drives with Large Speed Range," in conf. Record of IEEE-IAS Annual Meeting. pp. 568-575, 1984.
S. Nonaka, K. Kesamaru, K. Yamasaki, et al. "Interconnection System with Sinusoidal Output PWM Current Source Inverter between Photovoltaic Arrays and the Utility Line," IPEC-Tokyo, pp. 144-151, 1990.
S. Nonaka, K. Kesamaru, K. Yamasaki & M. Nishi, "Inter connection System with Single Phase IGBT PWM CSI between Photo-voltaic Arrays and The Utility Line." Conf. Rec. of IEEE/IAS Annual Meeting(Seatle Washington). pp. 1302, 1990.
R. Itoh, D. Eng. "Steady-state and transient characteristics for a single way step-down PWM GTO Voltage-source converter with sinusoidalsupply current." IEE PROCEEDINGS, Vol. 136. pt. B. No 4, pp. 168-174, July 1989.
P. Verdelho, G. D. Marques, "Digital Simulation and applic ations of the PWM Voltage Converter connected to the AC mains," EPE, FIRENZE, No 4, pp. 438-443, 1991.
L.H.Hwang, "A Study on Synchronized AC Power Source Voltage Regulator of Voltage Fed Inverter using a Photovoltatic effect," IEEK, Vol. 38, No. 8, 1998.
Byung-Hwan Jeong, Byung-Hee Kang, Gyu-Ha Choe, "Virtual -Implemented Solar Cell System with new Cell Model." IEEE34th Annual Power Electronics Specialist Conference, Vol. 3, pp. 736-740, 2003.
Y.S. Kong, E.S. Kim, I.G. Hwang, H.K. Lee "High-Efficiency Series-Parallel Resonant Converter For the Non-contact Power Supply," IEEE-APEC2005, Vol. 3, pp. 1496-1501, 2005.
AI-Helper
※ AI-Helper는 부적절한 답변을 할 수 있습니다.