Adaptive Passivity Based Control of Buck Power Converter with Constant Power Load

Adaptive Passivity Based Control of Buck Power Converter with Constant Power Load

Hassan, Mustafa Alrayah, Er-ping Li, Xue Li, Tianhang Li, Chenyang Duan, and Song Chi. “Adaptive passivity-based control of DC–DC buck power converter with constant power load in DC microgrid systems.” IEEE Journal of Emerging and Selected Topics in Power Electronics 7, no. 3 (2018): 2029-2040.

a robust nonlinear control strategy to solve the instability problem of dc-dc buck power converter with a constant power load in dc microgrid systems. Based on the passivity-based control (PBC), a nonlinear disturbance observer (NDO) is designed to improve the control robustness against both load and line variations, whereas the PBC guarantees the system stability due to its property of transient energy dissipation. By applying the disturbance estimation technique, NDO works in parallel with the PBC controller to compensate the disturbances through a feed-forward channel. This strategy ensures large signal stability as well as fast recovery performance of the system during disturbance/uncertainty as compared to other nonlinear control methods.