Title :
Small-signal modeling and control of three-phase grid-connected three-level neutral-point-clamped inverter with a LCL filter
Author :
Ja-Hwi Cho ; Nam-Joon Ku ; Rae-Young Kim ; Dong-Seok Hyun
Author_Institution :
Hanyang Univ., Seoul, South Korea
Abstract :
The propose of this paper is to present the systematic processes of constructing the averaged small-signal model of the three-phase grid-connected three-level neutral-point-clamped inverter with a LCL filter and to design the control system for the grid current by using the model. The systematic processes are composed of the averaging, perturbing and linearizing step about the circuit equations. In addition, this paper presents a frequency-domain analysis to design the control systems and study the system stability and the control scheme of the grid current based on the averaged small-signal model. The validity of the model is verified by the simulation and the experiments.
Keywords :
electric current control; filters; invertors; state-space methods; LCL filter; averaging step; circuit equations; frequency domain analysis; grid current control system; linearizing step; perturbing step; small signal modeling; three phase grid connected three level neutral point clamped inverter; Equations; Integrated circuit modeling; Inverters; Mathematical model; Switches; Transfer functions; Grid-connected; LCL filter; NPC averaged model; NPC inverter; NPC state space representation; NPC switching function Small-signal Model; Three-level inverter;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2013 IEEE
Conference_Location :
Denver, CO
DOI :
10.1109/ECCE.2013.6647242
