Abstract

Today, power distribution systems are highly penetrated by renewable energy sources, and this explains the dominant role of power electronic converters in their operation. However, the existence of several electronic power conversion units creates the so-called constant power load (CPL), which poses a serious stability issue in the operation of a DC microgrid. So, a robust controller with fast response is vital. This paper develops a small signal model for dc MGs from the control point of view, in order to study stability analysis and investigate effects of CPLs. A finite-set model predictive control (FS-MPC) is used to control of dc-dc buck converter in uncertain situations, i.e. when reference voltage changes and when input voltage of converter was changed. To evaluate the strangeness of the proposed controller comparative real time results and analysis of MPC with Backstepping and PID control is observed.

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