Predictive current control of boost three-level and T-type inverters cascaded in wind power generation systems

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Abstract

A topology structure based on boost three-level converters (BTL converters) and T-type three-level inverters for a direct-drive wind turbine in a wind power generation system is proposed. In this structure, the generator-side control can be realized by the boost-TL converter. Compared with the conventional boost converter, the boost-TL converter has a low inductor current ripple, which reduces the torque ripple of the generator, increases the converter's capacity, and minimizes switching losses. The boost-TL converter can boost the DC output from the rectifier at low speeds. The principles of the boost-TL converter and the T-type three-level inverter are separately introduced. Based on the cascaded structure of the proposed BTL converter and three-level inverter, a model predictive current control (MPCC) method is adopted, and the optimization of the MPCC is presented. The prediction model is derived, and the simulation and experimental research are carried out. The results show that the algorithm based on the proposed cascaded structure is feasible and superior.

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APA

Yang, G., Yi, H., Chai, C., Huang, B., Zhang, Y., & Chen, Z. (2018). Predictive current control of boost three-level and T-type inverters cascaded in wind power generation systems. Algorithms, 11(7). https://doi.org/10.3390/a11070092

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