Zhiqin Zhao, Yang Chen, Pengcheng Han, Xiaoqiong He, Xu Peng
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引用次数: 1
Abstract
Aiming at the unbalanced DC voltage of multi-module three-level neutral point clamp cascaded rectifier (3LNPC-CR), a smooth voltage balance modulation strategy is proposed in this paper to solve the problem of unbalanced capacitor voltage in modules and unbalanced DC link voltage between modules. On the premise of normal operation, the input level of each module must not change. The voltage balance effect of the universal voltage balance modulation and the smooth voltage balance modulation are compared and calculated. Simulation and experimental results verify the feasibility of this strategy.
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