Title :
Discrete-time modeling and stability analysis of grid-connected inverter based on equivalent circuit
Author :
Xuanlyu Wu ; Guochun Xiao ; Yong Lu ; Fengwen Chen ; Dapeng Lu
Author_Institution :
Sch. of Electr. Eng., Xi´an Jiaotong Univ., Xi´an, China
Abstract :
This paper presents a simplified discrete-time modeling and stability analysis method for digital controlled grid-connected inverters. Based on state-space average approximation, the dynamic of the original grid-connected inverter system is analyzed using the discrete-time model of the corresponding state-space average equivalent circuit. Compared to the conventional discrete-time modeling, this new approach has almost the same reliability and accuracy in stability prediction. In addition, the new model is more convenient for digital control design than the conventional discrete-time model due to its obvious simplicity. The simplified discrete-time modeling approach is validated by simulation and experiment.
Keywords :
circuit stability; control system synthesis; digital control; discrete time systems; equivalent circuits; invertors; power grids; power system reliability; power system stability; state-space methods; digital control design; digital controlled grid connected inverter stability analysis method; discrete-time modeling; state-space average approximation; state-space equivalent circuit reliability; Analytical models; Digital control; Equivalent circuits; Integrated circuit modeling; Power system stability; Stability analysis; Switches; Bifurcation; Digital control; Discrete-time modeling;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2015 IEEE
Conference_Location :
Charlotte, NC
DOI :
10.1109/APEC.2015.7104503
