Journal
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
Volume 9, Issue 1, Pages 451-460Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2019.2957231
Keywords
Switches; Inductors; Voltage control; Load modeling; Power electronics; Predictive models; Integrated circuit modeling; Automatic model; constant power load (CPL); current sharing (CS); dc microgrid (MG); model predictive control (MPC)
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This article presents a decentralized model predictive controller for power sharing and voltage regulation in dc microgrids, replacing traditional control methods to improve system response time and stability.
This article introduces a decentralized model predictive controller (DMPC) to ensure power sharing and regulate dc bus voltage in dc microgrids (MGs) with a constant power load (CPL). The proposed method replaces the conventional primary layer of dc MGs, i.e., inner loops and droop control, with a single optimal controller. A predictive automatic model of the system is realized for prediction purposes and to be used in the cost function. The control objectives are then incorporated in the cost function to attain an optimal state switching in each sampling time, hence regulating the dc bus voltage and accurate sharing of current among the MG. The proposed solution provides the system with a fast dynamic response and a zero steady-state error. The effectiveness of the proposed control is verified by hardware-in-the-loop (HIL) real-time experiments, and the results are compared with the conventional primary control.
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