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Optimized Stationary Operating Regime and Common-Mode Voltage Design for Modular Multilevel Converters in Drive Applications at High Frequency
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| Author(s) |
Qiuye GUI, Hendrik FEHR, Albrecht GENSIOR |
| Abstract |
For modular multilevel converters in drive applications, a special low-frequency mode resulting inadditional high current stress is generally utilized in the range around zero stator electrical frequency, since the conventional high-frequency mode for a higher frequency range may cause unaccepted large energy ripples in this low frequency range. To reduce the range for the undesired low-frequency mode, this paper aims on improving the high-frequency operation mode in terms of effectively reducing the cell capacitor voltage fluctuation, by means of a proposed online-implemented optimized stationary operating regime in cooperation with a new choice for the common-mode voltage which is designed under consideration of the energy ripples. Experiments confirm that the proposals lead to smaller cell capacitor voltage fluctuation than published variants, especially at relatively low frequencies. |
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| Filename: | 0138-epe2023-full-11423720.pdf |
| Filesize: | 996.4 KB |
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| Type |
Members Only |
| Date |
Last modified 2023-09-24 by System |
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