Hardware-in-the-Loop Experimental Setup of a LCL-Filtered Grid-Connected Inverter with Digital Proportional-Resonant Current Controller

Author(s)

Curi Busarello, Tiago Davi ; Guerreiro, Joel Filipe ; Simoes, Marcelo Godoy ; Pomilio, Jose Antenor ; IEEE

• Document type: Journal article
• Source: 2021 IEEE 22ND WORKSHOP ON CONTROL AND MODELLING OF POWER ELECTRONICS (COMPEL); v. N/A, p. 8-pg., 2021-01-01.

Abstract

This paper presents a Hardware-in-the-Loop setup of a LCL-filtered grid-connected inverter with digital Proportional-Resonant current controller. The power structure of the system, i.e. the power DC source, the transistor-based inverter, the LCL filter, the sensors and the grid are emulated in the Real-Time Simulator HIL402 from Typhoon-HIL, while the control strategy is embedded in the Digital Signal Controller TMS320F28335 from Texas Instruments. Descriptions of how to design the PR controller is presented. Details about the settings of the RTS are also described. The HIL verification consists of applying several real time test cases along the power structure as well as in the control strategy, allowing designers to rapidly evaluate the efficacy of the PR controller. Some modifications are: inclusion of an oscillation at the DC-link voltage, frequency variation at the grid voltage, variation of grid impedance, current reference step, among others. Results show that the HIL verification is an attractive tool for evaluating the PR current controller of a LCL-filtered grid-connected inverter. (AU)

• FAPESP's process: 16/08645-9 - Interdisciplinary research activities in electric smart grids
• Grantee: João Bosco Ribeiro do Val
• Support Opportunities: Research Projects - Thematic Grants