Modeling and Stability Analysis of a Novel Voltage-Oriented Power Coordination Controlled Constant-Frequency AC Microgrid System

Electronics

Dan Xiao¹  Xiuhui Tang¹  Miao Li¹  Daming Zhang¹ 

[1] School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney 2052, Australia;

关键词: islanded AC microgrid;    system modeling;    stability analysis;    stabilizing parameter tuning;   

DOI  :  10.3390/electronics10161935

来源: DOAJ

【 摘 要 】

The conventional AC microgrid power regulation method is achieved using dual undulations of the grid-side voltage and frequency, whose complex variables and processes make the system less efficient and stable. For this problem, this paper proposes a novel two-hierarchical small signal model stability analysis for islanded AC microgrid systems with a designed power regulation algorithm under the constant frequency, mainly aimed at the continual switching microgrids, and considers the future expansion. MATLAB/Simulink simulations and experiments are conducted to validate the feasibility. It is found that there is a strong consistency between the stability of primary and overall systems, and that two key parameters affect the stability properties. Discussing the mutual influence of various parameters, $k_1$ is positively correlated with control intensity and $k_2$ determines the proportion of reactive power distribution in each power generation. Contrasting with the previous complex processes, the unique points of this method are the simplicity of calculation, parameter induction, response testability, strong operability, and system extensibility. The conclusion is that this constant frequency power control is simple, feasible, and stable under several specified conditions.

【 授权许可】

Unknown