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首页> 外文期刊>Mathematical Problems in Engineering >A Novel Neutral-Point Potential Balance Strategy for Three-Level NPC Back-to-Back Converter Based on the Neutral-Point Current Injection Model
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A Novel Neutral-Point Potential Balance Strategy for Three-Level NPC Back-to-Back Converter Based on the Neutral-Point Current Injection Model

机译：基于中性点电流注入模型的三电平NPC背靠背变换器中性点电位平衡策略

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摘要

The neutral-point (NP) potential balance control in three-level neutral-point-clamped (NPC) back-to-back converter is a research nodus. Its current strategies are the same as the strategies of a single three-level NPC converter. But the strategies do not give full play to its advantages that the neutral-point current can only flow through the connected midlines in both sides of the converter but does not flow through the DC-bus capacitors. In this paper, firstly the NP potential model based on the NP current injected is proposed. It overcomes numerous variable constraints and mutual coupling in the conventional model based on the zero-sequence voltage injected. And then on this basis, three NP-potential balance control algorithms, unilateral control, bilateral independent control, and bilateral coordinated control, are proposed according to difference requirements. All of these algorithms use the midlines rather than the DC-bus capacitors to flow the NP current as much as possible. Their control abilities are further quantitatively analyzed and compared. Finally, simulation results verify the validity and effectiveness of these algorithms.
机译：三电平中性点钳位（NPC）背靠背转换器中的中性点（NP）电位平衡控制是一项研究课题。其当前策略与单个三级NPC转换器的策略相同。但是这些策略并未充分发挥其优势，即中性点电流只能流过转换器两侧的连接中线，而不能流过直流总线电容器。本文首先提出了基于注入的NP电流的NP电势模型。它基于注入的零序电压克服了传统模型中的众多可变约束和相互耦合。然后在此基础上，根据不同的需求，提出了三种NP势能平衡控制算法，即单边控制，双边独立控制和双边协调控制。所有这些算法都使用中线而不是DC总线电容器来使NP电流尽可能多地流动。他们的控制能力将进一步定量分析和比较。最后，仿真结果验证了这些算法的有效性。

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  • 来源
    《Mathematical Problems in Engineering》 |2015年第4期|736828.1-736828.12|共12页
  • 作者

    Wang Yingjie; Liu Haiyuan; Wang Wenchao; Wang Kangan;

  • 作者单位

    China Univ Min & Technol, Sch Informat & Elect Engn, Xuzhou 221116, Peoples R China.;

    China Univ Min & Technol, Sch Informat & Elect Engn, Xuzhou 221116, Peoples R China.;

    China Univ Min & Technol, Sch Informat & Elect Engn, Xuzhou 221116, Peoples R China.;

    China Univ Min & Technol, Sch Informat & Elect Engn, Xuzhou 221116, Peoples R China.;

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