TY  - EJOU
AU  - Chen, Wei 
AU  - Gao, Xin 
AU  - Wei, Zhanhong 
AU  - Yang, Xusheng 
AU  - Li, Zhao 

TI  - Synchronization Characterization of DC Microgrid Converter Output Voltage and Improved Adaptive Synchronization Control Methods
T2  - Energy Engineering

PY  - 2025
VL  - 122
IS  - 2
SN  - 1546-0118

AB  - This paper deeply introduces a brand-new research method for the synchronous characteristics of DC microgrid bus voltage and an improved synchronous control strategy. This method mainly targets the problem of bus voltage oscillation caused by the bifurcation behavior of DC microgrid converters. Firstly, the article elaborately establishes a mathematical model of a single distributed power source with hierarchical control. On this basis, a small-world network model that can better adapt to the topology structure of DC microgrids is further constructed. Then, a voltage synchronization analysis method based on the main stability function is proposed, and the synchronous characteristics of DC bus voltage are deeply studied by analyzing the size of the minimum non-zero eigenvalue. In view of the situation that the line coupling strength between distributed power sources is insufficient to achieve bus voltage synchronization, this paper innovatively proposes a new improved adaptive controller to effectively control voltage synchronization. And the convergence of the designed controller is strictly proved by using Lyapunov’s stability theorem. Finally, the effectiveness and feasibility of the designed controller in this paper are fully verified through detailed simulation experiments. After comparative analysis with the traditional adaptive controller, it is found that the newly designed controller can make the bus voltages of each distributed power source achieve synchronization more quickly, and is significantly superior to the traditional adaptive controller in terms of anti-interference performance.
KW  - DC microgrid; bifurcation; small-world network; voltage synchronization; improved adaptive control

DO  - 10.32604/ee.2025.059779