Power decoupling techniques for single-phase power electronics systems — An overview

The well-known double line frequency ripple power is a critical issue for single-phase power electronics systems, because it may lead to reduced system reliability and efficiency in many applications, e.g. photovoltaic (PV), light-emitting-diode (LED), fuel cell, and battery charger systems. In this paper, recently proposed state-of-the-art power decoupling techniques for ripple power reduction in these systems are presented and classified into different groups for performance comparison. The pros and cons of these techniques are discussed and identified, and the conclusions drawn will be useful for choosing suitable power decoupling topologies and control algorithms according to specific applications from a practical point of view. The future development trends and potentials on this research topic are also discussed.