Sliding mode combined with PI controller applied for current control of grid-connected single-phase inverter under distorted voltage conditions
Grid-connected inverters must be synchronized with the electrical grid to ensure stability and efficiency. However, abrupt grid distortions and harmonic components can degrade the controller’s performance. This paper proposes a sliding mode controller combined with a PI controller for current contro...
| Autores: | , , , |
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| Formato: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | Brasil |
| Recursos: | Associação Brasileira de Eletrônica de Potência (SOBRAEP) |
| Repositorio: | Eletrônica de Potência (Online) |
| Idioma: | inglés |
| OAI Identifier: | oai:ojs2.journal.sobraep.org.br:article/1025 |
| Acesso em linha: | https://journal.sobraep.org.br/index.php/rep/article/view/1025 |
| Access Level: | acceso abierto |
| Palavra-chave: | Grid-connected inverters Harmonic suppression Single-phase inverter Sliding mode control Voltage distortion |
| Resumo: | Grid-connected inverters must be synchronized with the electrical grid to ensure stability and efficiency. However, abrupt grid distortions and harmonic components can degrade the controller’s performance. This paper proposes a sliding mode controller combined with a PI controller for current control in a single-phase grid-connected inverter to enhance Total Harmonic Distortion performance. The primary contribution of this work is the development of a nonlinear controller with a constant switching frequency, addressing the common chattering problem in sliding mode controllers while maintaining adequate performance under distorted voltage conditions using a Phase-Locked Loop. The controller's performance was evaluated through laboratory experiments under normal and distorted grid conditions, and the results were compared with a repetitive controller, demonstrating its effectiveness in suppressing harmonics in regular operation and under distorted grid voltage conditions. |
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