Abstract
For the problem of leak inductance energy and voltage spike, given in the fly-back photovoltaic converter system (hereinafter abbreviated as PV), a new physical circuit of RCD (resistor-capacitor-diode) is proposed which based on the Boost circuit topology to recovering leak inductance energy and depressing main switch voltage spike during the commutation of power MOSFET. The circuit can recycle the leak inductance energy effectively [1−2], and suppress output capacitance (hereinafter abbreviated as Coss) electric discharge which caused the voltage spike during MOSFET switch-on. In addition, after detailed analysis, the new physical circuit can solve the problem of the energy loss generate from the Coss electric discharge which is not pay more attention by the other papers. The new design can clamp the drain-source voltage and implement the control policy of soft-switch. In this paper, we give the theoretical derivation of the circuit parameter and the implemented physically experimental curve of the physical circuit by analyzing the causes of voltage spike generated. Compared with the traditional method, improved the converter efficiency from 94.2 % to 96.2 %, and the MPPT efficiency to 99.4 %.
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Acknowledgement
The authors would like to the express thanks for the helpful discussions with Dr Li, and the AMETEK Programmable Power company for providing relevant photovoltaic equipment. The author also thank Mr. Sun for providing some opinions about the photovoltaic converter system design. Authors would like to thank Han Yu of University of Jinan Computational Intelligence Lab for providing relevant information about this meeting announced.
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Xu, H., Li, N. (2016). A Method of Reducing Output Waveform Distortion in Photovoltaic Converter System. In: Huang, DS., Han, K., Hussain, A. (eds) Intelligent Computing Methodologies. ICIC 2016. Lecture Notes in Computer Science(), vol 9773. Springer, Cham. https://doi.org/10.1007/978-3-319-42297-8_1
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DOI: https://doi.org/10.1007/978-3-319-42297-8_1
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