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박유나(Park Yuna),강기환(Kang Gihwan),주영철(Ju Youngchul),김수현(Kim Soohyun),고석환(Ko Sukwhan),장길수(Jang Gilsoo) 한국태양에너지학회 2016 한국태양에너지학회 논문집 Vol.36 No.5
This paper proposes the PV module fault diagnosis sensor which is applied to Zigbee wireless network, and monitoring system using the developed sensor. It is designed with embedded sensor in junction box. The diagnosis elements for algorithm were voltage and temperature. For that reason, It is able to reduce the price and separate the fault of bypass diode from shading differently from other monitoring systems. This fault diagnosis algorithm verified through the Field-installed operations of PV module.
Matlab을 이용한 손상된 바이패스 다이오드가 포함된 PV 모듈의 출력 추정
신우균(Shin Woogyun),고석환(Go Seokhwan),주영철(Ju Youngchul),장효식(Chang Hyosik),강기환(Kang Gihwan) 한국태양에너지학회 2016 한국태양에너지학회 논문집 Vol.36 No.5
Installed PV module in field is affected by shading caused by various field environmental factors. Bypass diodes are installed in PV module for preventing a power loss and degradation of PV module by shading. But, Bypass diode is easily damaged by surge voltage and has often initial a defect. This paper propose the electric characteristic variation and the power prediction of PV module with damaged bypass diode. Firstly, the resistance for normal bypass diode and damaged bypass diode of resistance was measured by changing the current. When the current increases, the resistance of normal bypass diode is almost constant but the resistance of damaged bypass diode increases. Next, To estimate power of PV module by damaged bypass diode, the equation for the current is derived using solar cell equivalent circuit. Finally, the derived equation was simulated by using MatLab tools, was verified by comparing experimental data.