Current Control and FPGA-Based Simulation of Grid-Tied Inverters

Overview

In this paper, the current controller synthesis and real-time testing in a grid-tied inverter system is discussed. The current loops are implemented using an observer–based linear quadratic regulator. The disturbance observer is employed to ensure zero steady state error in the presence of model uncertainties. A simulation model implemented in Simscape^TM Electrical^TM is used to evaluate the control algorithm in real–time on a Speedgoat real–time system with an IO334 field–programmable gate array (FPGA) I/O module. The results show the effectiveness of the proposed solution. 

⮕ See the publication in IEEE Xplore

Highlights

• Learn how to synthesize a controller for a grid-side converter using observer-based linear quadratic regulator (LQR) 
• Hardware-in-the-loop testing of grid-tied inverter using Simulink^® and Speedgoat hardware  
• Include switching dynamics for PWM frequencies up to 100 kHz. 
• Generate real-time code from the electrical plant to an IO334 Simulink^®-programmable FPGA I/O module 
• Experimental results from real-time simulation including plant and TI Launchpad microcontroller 

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