Title :
Small signal analysis applied to a single phase inverter connected to stiff AC system using a novel improved power controller
Author :
De Paiva, É P. ; Vieira, J.B., Jr. ; de Freitas, L.C. ; Farias, V.J. ; Coelho, E.A.A.
Author_Institution :
Electr. Eng. Fac., Fed. Univ. of Uberlandia
Abstract :
This paper presents an improved controller for a single-phase inverter connected to stiff AC system, which is based on frequency and voltage droops. A new feedback loop is introduced to increase the system damping. The small signal analysis and root locus plots are presented in order to show the connections between the feedback loop gains and behavior of the system. Simulation results corresponding to the numerical solution of the nonlinear system equations are presented to validate the small signal analysis. A description of a laboratory prototype and the respective experimental results are also presented to confirm the theoretical analysis
Keywords :
circuit feedback; damping; invertors; nonlinear equations; power control; root loci; AC system damping; feedback loop; frequency droop; nonlinear system equation; numerical solution; power controller; root locus plot; single phase inverter; small signal analysis; voltage droop; Analytical models; Control systems; Damping; Feedback loop; Frequency; Inverters; Nonlinear equations; Nonlinear systems; Signal analysis; Voltage control;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2005. APEC 2005. Twentieth Annual IEEE
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-8975-1
DOI :
10.1109/APEC.2005.1453133
