TY  - EJOU
AU  - Chen, Wei 
AU  - Qiu, Nan 
AU  - Yang, Xusheng 

TI  - Research on the Stability Analysis Method of DC Microgrid Based on Bifurcation and Strobe Theory
T2  - Energy Engineering

PY  - 2024
VL  - 121
IS  - 4
SN  - 1546-0118

AB  - During the operation of a DC microgrid, the nonlinearity and low damping characteristics of the DC bus make it prone to oscillatory instability. In this paper, we first establish a discrete nonlinear system dynamic model of a DC microgrid, study the effects of the converter sag coefficient, input voltage, and load resistance on the microgrid stability, and reveal the oscillation mechanism of a DC microgrid caused by a single source. Then, a DC microgrid stability analysis method based on the combination of bifurcation and strobe is used to analyze how the aforementioned parameters influence the oscillation characteristics of the system. Finally, the stability region of the system is obtained by the Jacobi matrix eigenvalue method. Grid simulation verifies the feasibility and effectiveness of the proposed method.
KW  - DC microgrid; bifurcation; nonlinear dynamics; stability analysis; oscillation characteristics

DO  - 10.32604/ee.2023.045475