Adaptive Control Approach for Accurate Current Sharing and Voltage Regulation in DC Microgrid Applications

Mohamed A. Mesbah, Khairy Sayed, Adel Ahmed, Mahmoud Aref, Z. M. S. Elbarbary, Ali Saeed Almuflih and Mahmoud A. Mossa ()
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Mohamed A. Mesbah: Faculty of Technology and Education, Sohag University, Sohag 1646130, Egypt
Khairy Sayed: Electrical Engineering Department, College of Engineering, Sohag University, Sohag 1646130, Egypt
Adel Ahmed: Department of Electrical Engineering, Assiut University, Assiut 71516, Egypt
Mahmoud Aref: Department of Electrical Engineering, Assiut University, Assiut 71516, Egypt
Z. M. S. Elbarbary: Department of Electrical Engineering, College of Engineering, King Khalid University, Abha 62523, Saudi Arabia
Ali Saeed Almuflih: Department of Industrial Engineering, College of Engineering, King Khalid University, Abha 62523, Saudi Arabia
Mahmoud A. Mossa: Electrical Engineering Department, Faculty of Engineering, Minia University, Minia 61111, Egypt

Energies, 2024, vol. 17, issue 2, 1-19

Abstract: A DC microgrid is an efficient way to combine diverse sources; conventional droop control is unable to achieve both accurate current sharing and required voltage regulation. This paper provides a new adaptive control approach for DC microgrid applications that satisfies both accurate current sharing and appropriate voltage regulation depending on the loading state. As the load increases in parallel, so do the output currents of the distributed generating units, and correct current sharing is necessary under severe load conditions. The suggested control approach raises the equivalent droop gains as the load level increases in parallel and provides accurate current sharing. The droop parameters were checked online and changed using the principal current sharing loops to reduce the variation in load current sharing, and the second loop also transferred the droop lines to eliminate DC microgrid bus voltage fluctuation in the adaptive droop controller, which is different and inventive. The proposed algorithm is tested using a variety of input voltages and load resistances. This work assesses the performance and stability of the suggested method using a linearized model and verifies the results using an acceptable model created in MATLAB/SIMULINK Software Version 9.3 and using Real-Time Simulation Fundamentals and hardware-based experimentation.

Keywords: distribution systems; DC microgrid; droop control; adaptive droop control; distributed energy; low voltage (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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