Modeling and Control of a Single-Phase Grid-Connected Inverter with LCL Filter

Author(s)

Bonaldo, Jakson Paulo ^[1] ; Olimpio Filho, Jose de Arimateia ^[2] ; dos Santos Alonso, Augusto Matheus ^{[2, 3]} ; Pinhabel Marafao, Fernando ^[2] ; Morales-Paredes, Helmo Kelis ^[2]

Affiliation

^[1] Fed Univ Mato Grosso UFMT, Dept Elect Engn, Cuiaba - Brazil

^[2] Sao Paulo State Univ Unesp, Inst Sci & Technol, Sorocaba - Brazil

^[3] Norwegian Univ Sci & Technol NTNU, Dept Elect Power Engn, Trondheim - Norway

• Document type: Journal article
• Source: IEEE Latin America Transactions; v. 19, n. 02, p. 250-259, FEB 2021.
• Web of Science Citations: 1

Abstract

The increasing penetration of renewable energy sources is pushing low-voltage electrical grids to become predominantly power electronic-based. Consequently, the design and operation of the related grid-connected converters must be achieved under proper manner, in order to maintain stability and support reliable operation of the entire power system. Thus, this work presents the modeling and control of a single-phase grid-connected multifunctional converter, which operates as a current-controlled voltage source inverter using an LCL-type output filter. An active damping approach is employed for attenuation of oscillations occurring from interactions between the grid and the inductances and capacitance of the LCL filter. Additionally, the voltage and current control loops of the inverter are addressed in this paper, along with the design of their respective controllers, considering that the grid impedance is unknown. Experimental results demonstrate stable operation of the inverter and show its satisfactory behavior under steady state conditions, proving its capability to offer ancillary services such as active filtering. (AU)

• FAPESP's process: 17/22629-9 - Development of compensation techniques and methodologies for power quality analysis of modern distribution systems
• Grantee: Helmo Kelis Morales Paredes
• Support Opportunities: Scholarships abroad - Research
• FAPESP's process: 17/20987-5 - Three-phase multifunctional Grid-Tie inverter for compensation instantaneous power oscillations
• Grantee: José de Arimatéia Olímpio Filho
• Support Opportunities: Scholarships in Brazil - Master
• 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
• FAPESP's process: 18/22172-1 - Experimental validation of a multiobjective strategy to coordinate multifunctional converters in AC low-voltage microgrids
• Grantee: Augusto Matheus dos Santos Alonso
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate