E3S Web Conf.
Volume 185, 20202020 International Conference on Energy, Environment and Bioengineering (ICEEB 2020)
|Number of page(s)
|Energy Engineering and Power System
|01 September 2020
A Novel Low Common-Mode Voltage Modulation Strategy for ANPC-5L Inverter
1 School of Electrical and Automation Engineering, Hefei University of Technology, Hefei, 230009, China
2 Zhejiang Academy of Special Equipment Science, Hangzhou, 310000, China
* Corresponding author’s e-mail: email@example.com
In order to suppress the leakage current of the active neutral point clamed five-level (ANPC-5L) inverter, this paper proposes a novel low common-mode voltage (CMV) modulation strategy based on the space vector modulation thought. Only the 55 voltage vectors with low CMV amplitude instead of all 125 voltage vectors are utilized. The CMV amplitude is suppressed to one-twelfth of the DC bus voltage (Vdc). In the simplified five-level space vector diagram, “obtuse triangle” synthesis principle is used to control the CMV changes twice in each carrier cycle, and get lower output current total harmonic distortion (THD). According to the vector thought, a carrier implementation method based on zero sequence voltage injection and carrier splitting is proposed. This method simplifies the calculation and is easy to implement.Simulation results prove the correctness and feasibility of this low CMV modulation strategy.
© The Authors, published by EDP Sciences, 2020
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