Abstract
In this paper, robust optimal control of a microgrid in an islanded operation mode is presented. The proposed control structure includes voltage controller and power droop controller. Voltage controller is a LMI-based mixed H2/H∞ state-feedback, while power droop controller is designed based on droop characteristics. Polytopic modeling approach has been used due to uncertainties and nonlinearities in the system. The purpose of designing this controller is to achieve the stability of the closed-loop system, reject the disturbances, share the equal powers between DG units, and minimize the energy consumption. Additionally, regional pole placement has been used to obtain well-damped transient responses. To evaluate the performance of the proposed controller, simulations are conducted by MATLAB/Simulink in two different scenarios including load perturbation and disconnection of a distributed generation (DG). In addition, the suggested controller is compared with the \({H}_{\infty }\) robust controller.
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Bagheri Rouch, T., Fakharian, A. Robust Control of Islanded DC Microgrid for Voltage Regulation Based on Polytopic Model and Load Sharing. Iran J Sci Technol Trans Electr Eng 46, 171–186 (2022). https://doi.org/10.1007/s40998-021-00462-5
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DOI: https://doi.org/10.1007/s40998-021-00462-5