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Simulation Suggests Origin of Potential Induced Degradation of Solar Cell

Journal of Power and Energy Engineering 2017年第6期5卷 43-49页

作者： Masato Ohmukai Akira Tsuyoshi Department of Electrical Engineering Akashi College of Technology Akashi Japan Department of Electrical Engineering Kobe City College of Technology Kobe Japan

Solar cells are well known as devices for sustainable electric energy generation. Nowadays the potential induced degradation has been brought up as an obstacle problem for practical use. In order to determine the cause of this kind of degradation, numerical simulation by a finite difference time domain method has been performed for computational electromagnetics in the case that the thunder attacks the solar modules. The results show that the dielectric breakdown in the glass covered over the solar cells triggered by the thunderstroke is critical. So it is helpful to protect the dielectric breakdown in the glass from the thunderstroke.

关键词： Solar Cell Potential Induced Degradation thunderstroke Leakage Current

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Effect of Parameters on Potential Induced Degradation of Solar Cell

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Journal of Power and Energy Engineering 2017年第6期5卷 36-42页

作者： Masato Ohmukai Akira Tsuyoshi Department of Electrical Engineering Akashi College of Technology Akashi Japan Department of Electrical Engineering Kobe City College of Technology Kobe Japan

Solar cells are widely used to generate electric energy even at homes. It surely has a great advantage of sustainability. However, the potential induced degradation has been found to be an obstacle problem for practical use. It was reported that the main cause is the dielectric breakdown in the glass covered over the solar cells triggered by the thunderstroke. In this paper, the effects of the parameters such as the position of thunderstroke, the wave form, the peak value and the front duration of the lightning current, were examined by means of numerical calculation. For the lightning current, a step-like waveform and an impulse waveform were examined. The effect of the induced voltage was found to be independent of the waveform. The peak value, the front duration of the lightning current greatly affects the induced voltage.

关键词： Solar Cell Potential Induced Degradation thunderstroke Leakage Current

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