Ripple-Port Module-Integrated Inverter for Grid-Connected PV Applications
Ripple-Port Module-Integrated Inverter for Grid-Connected PV Applications
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DOI：
10.1109/ecce.2012.6342693
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发表时间：
2012-11
影响因子：
4.4
通讯作者：
S. Harb;M. Mirjafari;R. Balog
中科院分区：
文献类型：
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作者：
S. Harb;M. Mirjafari;R. Balog
单相逆变器具有固有的双频功率涟漪，如果没有内部缓解，则会出现在输入端口并恶化最大功率点跟踪器的性能。传统的直流环节逆变器拓扑结构通过总线电容（通常为电解电容器的形式）滤除这种显著的双频涟漪，众所周知，电解电容器具有寿命挑战。本文提出了一种双频涟漪消除的概念和实验证明的概念。该模块集成逆变器是基于常用的两级逆变器。然而，第三个端口是为了消除涟漪而添加的。因此，需要非常小的电容，结果，可以使用高可靠性的薄膜电容器来代替笨重的低可靠性的电解电容器。
The single-phase inverter has inherent double-frequency power ripple, which if not internally mitigated, appears at the input port and deteriorates the maximum power point tracker performance. Conventional dc link inverter topologies filter this significant double-frequency ripple by means of the bus capacitance, usually in the form of electrolytic capacitors, which have well known lifetime challenges. This paper presents a double-frequency ripple cancellation concept and experimental proof of concept. The proposed module-integrated inverter is based on the commonly used two-stage inverter. However, a third port is added for ripple cancellation purposes. Hence, a very small capacitance is needed, and, as a result, a high-reliability film capacitor can be used instead of the bulky low-reliability electrolytic ones.