Title :
Modeling and control of multi modular converters using optimal LQR controller with integral action
Author :
Rakhshani, Elyas ; Mir Cantarellas, Antoni ; Remon, Daniel ; Rodriguez, Paul ; Candela, Ignacio
Author_Institution :
ABENGOA Res., Seville, Spain
Abstract :
A new application of LQR controller with the ability of reference tracking for a multi modular converter with several cells is proposed. First, the mathematical model for the grid connected MMC is presented and then, the small signal state space model is obtained. MMC is a very complex MIMO system with several state variables and global control for this system is very important issue. Optimal advanced controller based on linear quadratic regulator with integral action is a very good candidate for controlling the AC signals and energy balancing in multi cells MMC system. The performance and validity of obtained model and designed linear controller are evaluated with non-linear model of MMC in SimPower System toolbox/Matlab. Simulation results are verified the excellent performance of the proposed approach in the transient and steady state operational conditions.
Keywords :
MIMO systems; optimal control; power convertors; power grids; power system control; power system transients; AC signals; MIMO system; Matlab; SimPower System toolbox; energy balancing; global control; grid connected MMC; integral action; linear controller; linear quadratic regulator; multicells MMC system; multimodular converters; nonlinear model; optimal LQR controller; optimal advanced controller; reference tracking; small signal state space model; state variables; steady state operational condition; transient operational condition; Aerospace electronics; Capacitors; Current control; Equations; Mathematical model; Regulators; Voltage control; Linear quadratic regulator; Multi modular converter; Optimal control; Single-phase system;
Conference_Titel :
Energy Conversion Congress and Exposition (ECCE), 2013 IEEE
Conference_Location :
Denver, CO
DOI :
10.1109/ECCE.2013.6647226
