| 引用本文: | 王树文,单硕硕,张 洋,陈亮桥,徐天龙,李阿娇,周海莹,计 元.改进型准Z源逆变器[J].电力自动化设备,2016,36(9): |
| WANG Shuwen,SHAN Shuoshuo,ZHANG Yang,CHEN Liangqiao,XU Tianlong,LI Ajiao,ZHOU Haiying,JI Yuan.Improved quasi-Z-source inverter[J].Electric Power Automation Equipment,2016,36(9): |
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| 摘要: |
| 为了解决传统Z源逆变器升压能力有限、阻抗网络中电容电压过大、输入电流不连续等问题，提出了一种改进型准Z源逆变器——开关电感升压型准Z源逆变器（SB／SL-qZSI）拓扑。该拓扑除了具有传统准Z源逆变器的优点外，还实现了任意倍数的升压；相同电压增益下，降低了电容电压应力；较小的直通占空比即可获得较高的升压因子，增大了调制比范围，提高了输出电能质量和系统稳定性；同时新拓扑减少了电感和电容器件的使用，降低了系统的体积和重量。运用伏秒平衡法对其进行了理论分析，并采用3次谐波注入调制策略进行了仿真和实验，结果证明了新拓扑的正确性和优越性。 |
| 关键词: 逆变器 准Z源逆变器 电路拓扑 升压能力 电容电压 3次谐波注入法 |
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| 基金项目:黑龙江省留学归国基金资助项目（LC201003）；黑龙江省博士后基金资助项目（LBH-Z11228） |
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| Improved quasi-Z-source inverter |
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WANG Shuwen, SHAN Shuoshuo, ZHANG Yang, CHEN Liangqiao, XU Tianlong, LI Ajiao, ZHOU Haiying, JI Yuan
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College of Electrical and Information Engineering，Northeast Agricultural University，Harbin 150030，China
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| Abstract: |
| Aiming at the limited voltage boost capacity，too large impedance network capacitor voltage and discontinuous input current of traditional Z-source inverter，an improved topology of Z-source inverter，SB／SL-qZSI（Switched-Boost／Switched-inductor quasi-Z-Source Inverter），is proposed，which not only has the advantages of quasi-Z-source inverter but also realizes the arbitrary multiple boost. It applies less inductor and capacitor devices to reduce the system size and weight and its capacitor voltage stress under the same voltage gain is reduced. Higher boost factor can be achieved with smaller shoot-through duty ratio，which increases the modulation ratio range as well as improves the output power quality and system stability. The volt-sec. balance method is used in its theoretical analysis and the 3rd harmonic injection modulation strategy is applied in its simulation and experiment，verifying the correctness and superiority of the proposed topology. |
| Key words: electric inverters quasi-Z-source inverter electric network topology boost capacity capacitor voltage 3rd harmonic injection method |
