Title :
Composite Nonlinear Feedback Control and Stability Analysis of a Grid-Connected Voltage Source Inverter With LCL Filter
Author :
Eren, Suzan ; Pahlevaninezhad, Majid ; Bakhshai, Alireza ; Jain, P.K.
Author_Institution :
Dept. of Electr. & Comput. Eng., Queen´s Univ., Kingston, ON, Canada
Abstract :
In this paper, the stability analysis of a grid-connected voltage source inverter with an LCL filter is presented. The Poincaré map is used to analyze the stability of the system from a geometric point of view and provides a better understanding of the system performance. In addition, a composite nonlinear feedback (CNF) control is proposed in order to improve the transient and steady-state performance of the control system. Simulation and experimental analysis verify the validity of the analysis and also show the superiority of the CNF-based controller compared to the conventional proportional-resonant controller during transients and steady-state operation.
Keywords :
DC-AC power convertors; feedback; filters; invertors; nonlinear control systems; observers; power grids; stability; CNF control; LCL filter; Poincare map; composite nonlinear feedback control; geometric point of view; grid-connected voltage source inverter; stability analysis; steady-state performance; system performance; transient performance; Inverters; Low pass filters; Orbits; Oscillators; Power harmonic filters; Resonant frequency; Stability analysis; DC/AC inverter; nonlinear control; observer; proportional–resonant (PR) controller; pulsewidth modulation (PWM); renewable energy; state feedback;
Journal_Title :
Industrial Electronics, IEEE Transactions on
DOI :
10.1109/TIE.2012.2225399
