Small Signal Stability Analysis of Micro-source Inverter System in Grid-connected Series Micro-grid

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Wang, Xinggui^1,2 ; Zhang, Jianhua^1 ; Zhang, Jinjing^1 ; Yang, Weiman^1,2

College of Electrical Engineering and Information Engineering, Lanzhou University of Technology, Lanzhou

730050, China^1

Key Laboratory of Gansu Advanced Control for Industrial Processes, Lanzhou University of Technology, Lanzhou

730050, China^2

关键词: Coefficient matrix;    Equivalent resistance;    Matlab/Simulink software;    Micro-grid systems;    Series connections;    Small signal model;    Small signal stability;    Small signal stability analysis;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/4/012006/pdf
DOI  :  10.1088/1755-1315/186/4/012006

来源: IOP

【 摘 要 】

In order to accurately analyze the small signal stability of micro-source inverter system in grid-connected series micro-grid, the paper establishes a small signal model of grid-connected series micro-grid system, including the series connection model, power controller model, phase locked loop model, power and current controller model, load and network model. Based on the model, the step response of the state variable of the system is calculated when the active load is increased, and the feasibility of the model is validated by MATLAB/Simulink software. Meanwhile, we can calculate the initial value of the system and the eigenvalues of the coefficient matrix of the equivalent resistance change, we further analyzes the small signal stability of micro-source inverter system in grid-connected series micro-grid. At the same time, the correctness of the theory is verified by simulation.