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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：基于半周期PWM方案的单电感器双降压逆变器具有主动夹紧装置

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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：本文基于改进的半周期PWM（HPWM），介绍了一个名为单相电感双降压 - 升压逆变器（SIDBBI）的单相差分型光伏逆变器。传统的DBBI（CDBBI）是光伏应用的良好选择，由于升压输入的升压能力。然而，所固有的高电感器电流和电感尺寸和设备额定值的相应增量使其使其不如其他拓扑吸引力。本文提出了一种具有主动钳位开关的HPWM方案，以通过消除输出电压偏移来降低电感电压摆动，高感电流和部件应力。在所提出的调制下，CDBBI中的组件电压应力可以减少零偏移，并且它出现了将两个模块的半利用电感，主开关和互补二极管集成到一个集合，这是所提出的SIDBBI拓扑结构。已经建立了传统/提出的逆变器的500 W原型以进行验证和比较。在提议的HPWM下进行详细的分析和实验结果表明，SIDBBI的尺寸可以减少40.4％，而不是CDBBI，通过升压/下降能力保持相当于96％和宽的输入覆盖率的相当效率。比较结果，与各种降压逆变器拓扑相比，SIDBBI在组件计数，压力和损失方面具有竞争力。

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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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