一种基于电容储能反馈的CHBR电压平衡控制策略

Q. Lu, Zhixuan Gao, Tao Ru, Cong Wang
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引用次数: 0

摘要

针对级联h桥整流器在单位功率因数条件下直流电容电压不平衡的问题,提出了一种基于电容储能反馈的新型电压平衡控制策略。与传统方法相比,该方法提高了系统对负载变化的抗干扰性能。具体介绍了d-q坐标系下CHBR的数学模型。然后,建立了各h桥电容能量和占空比补偿的数学表达式,并给出了所提策略的详细实现。最后,通过仿真验证了所提策略的正确性和有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
A Novel Voltage-Balancing Control Strategy for CHBR Based on Feedback of the Energy Stored in Capacitor
Aiming at the problem of DC capacitor voltage imbalance in cascade H-bridge rectifier under the condition of unit power factor, the paper proposes a novel voltage-balancing control strategy based on feedback of the energy stored in capacitor. Compared with the traditional method, the proposed method enhanced the the system anti-interference preformance to load variation. Specifically, the mathematical model of the CHBR in the d-q coordinate frame is introduced. Then, The mathematical expression of capacitor energy and duty cycle compensation of each H-bridge is established, and the detailed implementation of the proposed strategy is given in this paper. Finally, the correctness and effectiveness of the proposed strategy are verified by simulation.
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