Design and Implementation of a T-Type Based Topology for Grid-Connected Current-Source Inverters in PV Applications
This paper presents a novel non-isolated 5-level inverter for interfacing renewable sources to the power grid. It consists of a modified T-type converter with an HERIC-based AC decoupling strategy. The 5-level output voltage is filtered by a passively damped LCL filter, resulting in a high power den...
| Authors: | , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2022 |
| Country: | Brasil |
| Institution: | Associação Brasileira de Eletrônica de Potência (SOBRAEP) |
| Repository: | Eletrônica de Potência (Online) |
| Language: | English |
| OAI Identifier: | oai:ojs2.journal.sobraep.org.br:article/144 |
| Online Access: | https://journal.sobraep.org.br/index.php/rep/article/view/144 |
| Access Level: | Open access |
| Keyword: | Current Controlled Inverter Grid-Connected LCL filter multilevel inverter PV Applications |
| Summary: | This paper presents a novel non-isolated 5-level inverter for interfacing renewable sources to the power grid. It consists of a modified T-type converter with an HERIC-based AC decoupling strategy. The 5-level output voltage is filtered by a passively damped LCL filter, resulting in a high power density structure. Experimental results on a 250 (W) prototype are presented to validate the operating principle of the proposed topology and show a high efficiency over the entire output power range. Besides, the injected current complies with the IEEE 1547-2018 specifications regarding harmonic content until the 10th harmonic, using a classical PI controller with an additional feedforward term. |
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