Abstract
In this paper, TL-Boost is adopted as a front-end converter in the non-isolated photovoltaic grid-connected system, the common-mode leakage current equivalent circuit of TL-Boost circuit is established, and the calculation formula of leakage current of the system is derived. On this basis, a conclusion that the common-mode leakage current of the system can be reduced using the synchronous modulation strategy is obtained. Aiming at the problem of unbalanced neutral-point potential in the process of starting up when DC bus voltage is building up, a fuzzy control strategy based on pre-TL-Boost circuit is proposed, thus realizing the balance of two capacitors’ voltage on the DC side. And the experimental results verify the theoretical analysis.
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Cheng, G., Xie, Y., Fang, Y., Zheng, J., Yang, C. (2016). Study on the Leakage Current and Neutral-Point Potential Balance in TL-Boost Photovoltaic System. In: Jia, Y., Du, J., Zhang, W., Li, H. (eds) Proceedings of 2016 Chinese Intelligent Systems Conference. CISC 2016. Lecture Notes in Electrical Engineering, vol 404. Springer, Singapore. https://doi.org/10.1007/978-981-10-2338-5_55
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DOI: https://doi.org/10.1007/978-981-10-2338-5_55
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