Conventional vector current control (VCC) based grid-following inverters suffer from stability issues under weak grid, which attracts a lot of attention in recent years. Small-signal linearized model is an effective tool to analyze the stability of such nonlinear systems. In this paper, three small-signal stability analysis methods are compared, which are the state-space method, impedance analysis method, and equivalent single-input single-output (SISO) stability analysis method. These three methods are based on the same primitive system but with different input-output relations. Through strict analysis, it is found that the three methods basically predict the same stability boundary. Finally, the advantages and disadvantages of three methods are summarized and compared.
|Conference||2021 International Aegean Conference on Electrical Machines and Power Electronics (ACEMP) & 2021 International Conference on Optimization of Electrical and Electronic Equipment (OPTIM)|
|Period||02/09/2021 → 03/09/2021|
|Series||Optimization of Electrical and Electronic Equipment (OPTIM), Proceedings|
- small-signal model
- stability analysis
- vector current control
- grid following inverter