title: Design of an Internal Model Control strategy for single-phase grid-connected PWM inverters and its performance analysis with a non-linear local load and weak grid.
abstract: This paper presents the design of a controller based on Internal Model Control (IMC) applied to a grid-connected single-phase PWM inverter. The mathematical modeling of the inverter and the LCL output filter, used to project the 1-DOF IMC controller, is presented and the decoupling of grid voltage by a Feedforward strategy is analyzed. A Proportional - Resonant Controller (P+Res) was used for the control of the same plant in the running of experimental results, thus moving towards the discussion of differences regarding IMC and P+Res performances, which arrived at the evaluation of the proposed control strategy. The results are presented for typical conditions, for weak-grid and for non-linear local load, in order to verify the behavior of the controller against such situations.
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, MG, Brazil. Electronic address: eric.neryx@gmail.com.
authors.forename: Eric N
authors.initials: EN
authors.lastname: Chaves
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, MG, Brazil.
authors.forename: Ernane A A
authors.initials: EAA
authors.lastname: Coelho
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, MG, Brazil.
authors.forename: Henrique T M
authors.initials: HTM
authors.lastname: Carvalho
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, MG, Brazil.
authors.forename: Luiz C G
authors.initials: LCG
authors.lastname: Freitas
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, MG, Brazil.
authors.forename: João B V
authors.initials: JBV
authors.lastname: Júnior
authors.affiliation: Universidade Federal de Uberlândia, Uberlândia, MG, Brazil.
authors.forename: Luiz C
authors.initials: LC
authors.lastname: Freitas
keywords: Distributed generation; Grid-connected single-phase systems; Internal Model Control – IMC; Proportional – Resonant