Abstract
Microgrids are versatile systems for integration of renewable energy sources and non-conventional storage devices. Sliding Mode techniques grant excellent features of robustness controlling power conditioning systems, making them highly suitable for microgrid applications. However, problems may arise when a converter is set to behave as a Constant Power Load (CPL). These issues manifest in the stability of internal dynamics (or Zero Dynamics), which is determined by the input filter of the power module. In this paper, a special Lyapunov analysis is conducted to address the nonlinear internal dynamics of SM controlled power modules with CPL. It takes advantage of a Liérnad-type description, establishing stability conditions and providing a secure operation region. These conditions are translated into conductance and invariant region diagrams, turning them into tools for the design of power module filters.
Highlights
Microgrids can be succinctly understood as an interactive hybrid system that combines distributed generation modules, storage modules and loads
This paper proposed design criteria for input filters operating in DC microgrid applications with
The presented methods were aimed to ensure the stable operation of power modules controlled by Sliding Mode Control techniques
Summary
Microgrids can be succinctly understood as an interactive hybrid system that combines distributed generation modules, storage modules and loads. This study is performed taking advantage of a transformation to a Liérnad-type description, establishing sufficient conditions to define the stability of the nonlinear system and providing a secure operation region These conditions are, subsequently, condensed into conductance and invariant region diagrams, which are proposed as versatile tools for the design of power module filters. The first one is to obtain sufficient conditions for the zero dynamics (ZD) stability, over the full nonlinear operation range of SM controlled converters with CPL Based on those conditions, the second step consists of elaborating a filter design criteria with the help of ad hoc conductance diagram description. Both aforementioned steps are treated in detail
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
