Circulating Current Suppression Control Method for Distributed Grid-Connected Converter
Distributed three-level converters operate in a grid-connected state through an input-parallel output-parallel (IPOP) mode. These converters offer advantages such as high efficiency, high flexibility, and low cost, making them widely applicable in new energy scenarios such as energy storage converte...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Control and Information Technology
2024-12-01
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| Series: | Kongzhi Yu Xinxi Jishu |
| Subjects: | |
| Online Access: | http://ctet.csrzic.com/thesisDetails#10.13889/j.issn.2096-5427.2024.06.008 |
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| _version_ | 1849224653796540416 |
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| author | HU Liang ZHOU Zhenbang MEI Wenqing WANG Yue FU Jianguo LIU Yayun |
| author_facet | HU Liang ZHOU Zhenbang MEI Wenqing WANG Yue FU Jianguo LIU Yayun |
| author_sort | HU Liang |
| collection | DOAJ |
| description | Distributed three-level converters operate in a grid-connected state through an input-parallel output-parallel (IPOP) mode. These converters offer advantages such as high efficiency, high flexibility, and low cost, making them widely applicable in new energy scenarios such as energy storage converter and photovoltaic converter. Grid-connected converters are deemed one of important solutions in the context of increasing proportions of renewable energy utilization and power electronic equipment application. In order to suppress circulating currents in distributed IPOP three-level grid-connected converter systems, this paper proposes a circulating current suppression control method specific for this type of converters. A power equivalent model was established to simulate zero-sequence circulating currents, allowing for the analysis of harmonic components in circulating currents based on the carrier disposition modulation of injected zero-sequence voltage. The proportional complex integral (PCI) method is introduced for compensating for the zero-sequence modulation of each independent controller, to suppress low-frequency circulating currents between converters. Moreover, zero-sequence DC component suppression is integrated in the virtual speed governor link to achieve comprehensive control. The method proposed eliminated over 90% of the circulating current components in simulations and experiments, verifying the correctness and effectiveness of the zero-sequence circulating current modeling and suppression approach. |
| format | Article |
| id | doaj-art-75138bcbd40f48fb901b4759da7b8f7f |
| institution | Kabale University |
| issn | 2096-5427 |
| language | zho |
| publishDate | 2024-12-01 |
| publisher | Editorial Office of Control and Information Technology |
| record_format | Article |
| series | Kongzhi Yu Xinxi Jishu |
| spelling | doaj-art-75138bcbd40f48fb901b4759da7b8f7f2025-08-25T06:57:51ZzhoEditorial Office of Control and Information TechnologyKongzhi Yu Xinxi Jishu2096-54272024-12-01606680141281Circulating Current Suppression Control Method for Distributed Grid-Connected ConverterHU LiangZHOU ZhenbangMEI WenqingWANG YueFU JianguoLIU YayunDistributed three-level converters operate in a grid-connected state through an input-parallel output-parallel (IPOP) mode. These converters offer advantages such as high efficiency, high flexibility, and low cost, making them widely applicable in new energy scenarios such as energy storage converter and photovoltaic converter. Grid-connected converters are deemed one of important solutions in the context of increasing proportions of renewable energy utilization and power electronic equipment application. In order to suppress circulating currents in distributed IPOP three-level grid-connected converter systems, this paper proposes a circulating current suppression control method specific for this type of converters. A power equivalent model was established to simulate zero-sequence circulating currents, allowing for the analysis of harmonic components in circulating currents based on the carrier disposition modulation of injected zero-sequence voltage. The proportional complex integral (PCI) method is introduced for compensating for the zero-sequence modulation of each independent controller, to suppress low-frequency circulating currents between converters. Moreover, zero-sequence DC component suppression is integrated in the virtual speed governor link to achieve comprehensive control. The method proposed eliminated over 90% of the circulating current components in simulations and experiments, verifying the correctness and effectiveness of the zero-sequence circulating current modeling and suppression approach.http://ctet.csrzic.com/thesisDetails#10.13889/j.issn.2096-5427.2024.06.008grid-connected convertercirculating current suppressioninput-parallel output-parallel(IPOP)interconnection of distributed resourcemodelingproportional complex integral(PCI) |
| spellingShingle | HU Liang ZHOU Zhenbang MEI Wenqing WANG Yue FU Jianguo LIU Yayun Circulating Current Suppression Control Method for Distributed Grid-Connected Converter Kongzhi Yu Xinxi Jishu grid-connected converter circulating current suppression input-parallel output-parallel(IPOP) interconnection of distributed resource modeling proportional complex integral(PCI) |
| title | Circulating Current Suppression Control Method for Distributed Grid-Connected Converter |
| title_full | Circulating Current Suppression Control Method for Distributed Grid-Connected Converter |
| title_fullStr | Circulating Current Suppression Control Method for Distributed Grid-Connected Converter |
| title_full_unstemmed | Circulating Current Suppression Control Method for Distributed Grid-Connected Converter |
| title_short | Circulating Current Suppression Control Method for Distributed Grid-Connected Converter |
| title_sort | circulating current suppression control method for distributed grid connected converter |
| topic | grid-connected converter circulating current suppression input-parallel output-parallel(IPOP) interconnection of distributed resource modeling proportional complex integral(PCI) |
| url | http://ctet.csrzic.com/thesisDetails#10.13889/j.issn.2096-5427.2024.06.008 |
| work_keys_str_mv | AT huliang circulatingcurrentsuppressioncontrolmethodfordistributedgridconnectedconverter AT zhouzhenbang circulatingcurrentsuppressioncontrolmethodfordistributedgridconnectedconverter AT meiwenqing circulatingcurrentsuppressioncontrolmethodfordistributedgridconnectedconverter AT wangyue circulatingcurrentsuppressioncontrolmethodfordistributedgridconnectedconverter AT fujianguo circulatingcurrentsuppressioncontrolmethodfordistributedgridconnectedconverter AT liuyayun circulatingcurrentsuppressioncontrolmethodfordistributedgridconnectedconverter |