Abstract
With the rapid development of renewable energy, power conversion systems play a vital role in the new energy grid. In this paper, aiming at the power unit of power conversion system based on SiC MOSFET, which includes 10 kV high voltage AC module and 750 V low voltage DC module, the low inductance design and heat dissipation design methods of the power unit are emphatically studied, and the overall design scheme of the power unit is proposed. By optimizing the structure of laminated bus, the stray inductance of high voltage AC module and low voltage DC module is reduced to 794 μH and 235 μH respectively, which effectively reduces the turn-off overvoltage of power unit. Through the thermal simulation analysis, the heat dissipation scheme of forced air cooling is established, and the required radiator and fan are designed, so that the maximum temperature of the device in the operation process would not exceed 50 ℃. Finally, the prototype of the power unit is built and the towing experiment is carried out, which verifies the effectiveness of the optimization design of the laminated bus structure and the heat dissipation design scheme of the power unit.
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Acknowledgments
This work is partially supported by the China Southern Power Grid (GDKJXM20193412).
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Xie, N., Zhao, Y., Zhao, W., Yue, J., Wang, W., Zhang, C. (2022). Design Method for Power Unit of Power Conversion System Based on SiC MOSFET. In: Yang, Q., Liang, X., Li, Y., He, J. (eds) The proceedings of the 16th Annual Conference of China Electrotechnical Society. Lecture Notes in Electrical Engineering, vol 889. Springer, Singapore. https://doi.org/10.1007/978-981-19-1528-4_39
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DOI: https://doi.org/10.1007/978-981-19-1528-4_39
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