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首页> 外文期刊>Power Electronics, IET >Single inductor dual buck-boost inverter based on half-cycle PWM scheme with active clamping devices
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Single inductor dual buck-boost inverter based on half-cycle PWM scheme with active clamping devices

机译：基于带有有源钳位器件的半周期PWM方案的单电感器双降压-升压型逆变器

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摘要

This paper presents a single-phase differential-type photovoltaic inverter named single inductor dual buck-boost inverter (SIDBBI) based on improved half-cycle PWM (HPWM). Conventional DBBI (CDBBI) is a good option for photovoltaic application due to step-up/down ability for varying inputs. However, inherent high inductor current and corresponding increments of inductor size and device ratings have made it less attractive than other topologies. This paper proposes an HPWM scheme with active clamping switches to reduce inductor voltage swing, highly induced current and component stresses by eliminating output voltages offsets. Under the proposed modulation, component voltage stresses in CDBBI can be reduced by zero offset, and there arises a chance to integrate half-utilized inductors, main switches and complementary diodes of two modules into one set, which is the proposed SIDBBI topology. 500 W prototypes of the conventional/proposed inverters have been built for verifications and comparison. Detailed analysis and experimental results under the proposed HPWM show that the size of SIDBBI can be reduced by 40.4% than CDBBI, maintaining comparable efficiency over 96% and wide input coverage by step-up/down ability. Comparative results address that SIDBBI is competitive in terms of component counts, stresses and losses, compared with various kinds of buck-boost inverter topologies.
机译：本文提出了一种基于改进的半周期PWM（HPWM）的单相差动型光伏逆变器，称为单电感双降压-升压逆变器（SIDBBI）。常规的DBBI（CDBBI）是用于光伏应用的一个不错的选择，因为它具有可变的输入升压/降压能力。但是，固有的高电感器电流以及相应的电感器尺寸和器件额定值增量使得其不如其他拓扑吸引人。本文提出了一种具有有源钳位开关的HPWM方案，以通过消除输出电压失调来减少电感器电压摆幅，高感应电流和组件应力。在建议的调制方式下，CDBBI中的组件电压应力可以降低零偏移，并且有机会将两个模块的半使用电感器，主开关和互补二极管集成到一组中，这就是建议的SIDBBI拓扑。已构建了500 W常规/提议的逆变器原型，用于验证和比较。在建议的HPWM下进行的详细分析和实验结果表明，SIDBBI的大小可比CDBBI减小40.4％，可保持96％以上的可比效率，并具有升/降压功能，可广泛地覆盖输入。比较结果表明，与各种降压-升压型逆变器拓扑相比，SIDBBI在组件数量，应力和损耗方面具有竞争力。

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  • 来源
    《Power Electronics, IET》 |2019年第5期|1011-1020|共10页
  • 作者

    Lee Moonhyun; Kim Jong-Woo; Lai Jih-Sheng;

  • 作者单位

    Virginia Polytech Inst & State Univ, Dept Elect & Comp Engn, 220 Invent Lane, Blacksburg, VA 24061 USA;

    Virginia Polytech Inst & State Univ, Dept Elect & Comp Engn, 220 Invent Lane, Blacksburg, VA 24061 USA;

    Virginia Polytech Inst & State Univ, Dept Elect & Comp Engn, 220 Invent Lane, Blacksburg, VA 24061 USA;

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