基于中性点箝位的双向AC/DC变换器

ISIE 2001. 2001 IEEE International Symposium on Industrial Electronics Proceedings (Cat. No.01TH8570) Pub Date : 2001-06-12 DOI:10.1109/ISIE.2001.931865

B. Lin, Der-Jan Chen, Hui-Ru Tsay

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引用次数: 34

摘要

提出了一种基于中性点二极管箝位结构的单相双向AC/DC变换器，该变换器能在输入功率因数接近一致的情况下产生干净的正弦波电流，实现直流母线电压调节。基于中性点二极管箝位方案，将功率器件的电压应力箝位到直流母线电压的一半，而不是传统的半桥和全桥PWM整流器的直流链路电压的一半。线路电流指令跟踪、电压调节和平衡中性点电压分别由内环电流控制器、外环电压控制器和电压平衡补偿器完成。为了在AC/DC变换器的交流端产生三电平PWM模式，采用了市电电压的区域检测器。实验结果验证了所提控制方案的有效性。

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Bi-directional AC/DC converter based on neutral point clamped

A single-phase bi-directional AC/DC converter based on neutral point diode clamped configuration is proposed to draw a clean sinusoidal line current with nearly unity input power factor and to achieve DC bus voltage regulation. Based on the neutral point diode clamped scheme, the voltage stress of the power devices is clamped to half DC bus voltage instead of full DC link voltage in the conventional half and full bridge PWM rectifier. The line current command tracking, voltage regulation and balanced neutral point voltage are performed by the inner loop current controller, the outer loop voltage controller and voltage balance compensator, respectively. To generate a three-level PWM pattern on the AC terminal of the AC/DC converter, a region detector of the mains voltage is employed. The effectiveness of the proposed control scheme is confirmed by the experimental results.

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来源期刊

ISIE 2001. 2001 IEEE International Symposium on Industrial Electronics Proceedings (Cat. No.01TH8570)

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