Novel Passive Controller Design for Enhancing Boost Converter Stability in DC Microgrid Applications

Boost converters have nonminimum phase (NMP) characteristics, which makes the stable closed-loop control design difficult. Based on passive theory, this article proposes to add a feedforward loop in conventional double-loop closed compensate for NMP effect. Therefore, potential instability caused by can be avoided. Such compensation is especially useful dc microgrid applications where boost are widely used as interface converters. Two types of gain discussed and compared. The $K$ with high-pass filter eventually integrating droop because it does not change low-frequency quiescent operation point. stability proposed controller analyzed through notation="LaTeX">$s$ plane. Besides, how output impedance converter shaped analyzed. experimental results validate effectiveness controller.