Quasi Z-source Three-level Inverter with Reduced Capacitor Voltage and Its Constant Power Grid-connected Control

YU Deqing; CHENG Qiming; GAO Jie; CHENG Yinman; ZHANG Yu; DAI Jiaqi

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Quasi Z-source Three-level Inverter with Reduced Capacitor Voltage and Its Constant Power Grid-connected Control

更新时间：2025-12-08

- Quasi Z-source Three-level Inverter with Reduced Capacitor Voltage and Its Constant Power Grid-connected Control
- Vol. 44, Issue 4, Pages: 1319-1327(2018)
- 作者机构：
  
  1. 上海电力学院自动化工程学院上海市电站自动化技术重点实验室
  2. 同济大学电子与信息工程学院
  3. 国电泰州发电有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：10 May 2018，
  
  Published：2018
- 稿件说明：
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YU Deqing, CHENG Qiming, GAO Jie, et al. Quasi Z-source Three-level Inverter with Reduced Capacitor Voltage and Its Constant Power Grid-connected Control[J]. 2018, 44(4): 1319-1327.
DOI：

YU Deqing, CHENG Qiming, GAO Jie, et al. Quasi Z-source Three-level Inverter with Reduced Capacitor Voltage and Its Constant Power Grid-connected Control[J]. 2018, 44(4): 1319-1327. DOI：

摘要

针对传统Z源三电平逆变器的Z源网络电容电压应力大、启动时存在冲击电流等问题

提出一种新型的准Z源中点钳位式（NPC）三电平逆变器拓扑结构

并对其并网控制方法进行研究。首先

分析了新型准Z源NPC三电平逆变器的结构和工作原理;然后将恒功率控制策略引入到准Z源NPC三电平逆变器的并网控制中

并结合SVPWM调制策略实现了逆变器并网控制;最后

进行了软件仿真与硬件实验。结果表明:准Z源NPC三电平逆变器能够减小Z源网络电容电压应力

并网控制方法能够实现逆变器输出的有功、无功功率有效跟踪设定值

且并网电流谐波含量较低。

Abstract

To solve the problems that the voltage stress of traditional Z-source three-level inverter capacitor is high and huge inrush current exists when starting-up

we proposed a new quasi Z-source NPC three-level inverter topology and researched its grid-connected control method.First

we analyzed the structure and working principle of the new quasi Z-source three-level neutral point clamped（NPC） inverter;then

we introduced a constant power control strategy to quasi Z-source three-level NPC inverter grid-connected system.Finally

software simulation and hardware experiment were carried out.Experimental results show that the quasi Z-source three-level NPC inverter can reduce the voltage stress of the Z-source network capacitor

andthe control method can realize the effectively tracking set values of the grid inverter output active and reactive power with low current harmonic content.

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