Split-source inverter (SSI) is a topology developed for flexibly stepping up and down its ac output voltage using only a standard inverter bridge. However, when configured as a single-phase inverter, it is still burdened by common second-order ripples. This study, therefore, proposes a modified SSI (MSSI) that can perform dual power decoupling. Unlike existing schemes, dual power decoupling makes use of both dc- and ac-side capacitors for diverting second-order ripples away from the dc source, which may be solar or other types of sources that do not work well with sizable ripples. Dual power decoupling, however, requires careful topological changes, before its effective realisation can be achieved with only a standard inverter bridge and a very small overall capacitance. Design of this capacitance and its comparison with passive decoupling have then been analysed, before testing the MSSI in experiments. Results obtained have verified the MSSI as an enhanced single-phase inverter with both buck and boost abilities while using no extra switches.

中文翻译：

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具有单相双电源去耦的改进型分源逆变器

分离源逆变器（SSI）是一种拓扑结构，旨在仅使用标准逆变器电桥来灵活地提高和降低其交流输出电压。但是，当配置为单相逆变器时，它仍然会受到常见的二阶纹波的影响。因此，这项研究提出了一种可以执行双电源去耦的改进型SSI（MSSI）。与现有方案不同，双电源去耦利用直流和交流侧电容器将二阶纹波从直流源转移开，直流源可能是太阳能或其他类型的源，不适用于较大的纹波。然而，双功率去耦需要仔细的拓扑变化，然后才能有效地实现它，而只有标准的逆变桥和很小的总电容才能实现。然后在实验中测试MSSI之前，分析了该电容的设计及其与无源去耦的比较。获得的结果证明了MSSI是具有降压和升压功能且不使用额外开关的增强型单相逆变器。