An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppression
Existing capacitor voltage ripple suppression methods primarily rely on second-harmonic circulating current injection （SHCCI）. However， these methods often increase valve losses in modular multilevel converters （MMCs） ， degrading operational efficiency and reliability. To address this challenge， thi...
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| Format: | Article |
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zhejiang electric power
2025-07-01
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| Series: | Zhejiang dianli |
| Subjects: | |
| Online Access: | https://zjdl.cbpt.cnki.net/portal/journal/portal/client/paper/5b584eb738e71b7eafd4582b6abe7821 |
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| _version_ | 1850070683275493376 |
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| author | FANG Dongping QIU Yang CUI Jindong FEI Lisong TANG Fangjie ZHAO Jiancheng |
| author_facet | FANG Dongping QIU Yang CUI Jindong FEI Lisong TANG Fangjie ZHAO Jiancheng |
| author_sort | FANG Dongping |
| collection | DOAJ |
| description | Existing capacitor voltage ripple suppression methods primarily rely on second-harmonic circulating current injection （SHCCI）. However， these methods often increase valve losses in modular multilevel converters （MMCs） ， degrading operational efficiency and reliability. To address this challenge， this paper first analyzes the capacitor voltage ripple characteristics of MMCs under optimal SHCCI and reveals the additional converter valve losses incurred by ripple suppression. For medium- and low-voltage MMCs employing carrier phase shift pulse width modulation （CPS-PWM）， a loss-reduction control strategy is proposed that explicitly considers capacitor voltage ripple suppression. Based on the optimization objectives and constraints of capacitor voltage ripple and valve loss， the bridge arm current is optimally controlled to eliminate the valve loss increment induced by ripple suppression while maintaining ripple suppression performance. Finally， a comparative analysis under multiple operating conditions is performed in MATLAB/Simulink to validate the accuracy of the valve loss characteristic analysis and the effectiveness of the proposed control strategy. |
| format | Article |
| id | doaj-art-7d759f9e8b454084a674582bac677a21 |
| institution | DOAJ |
| issn | 1007-1881 |
| language | zho |
| publishDate | 2025-07-01 |
| publisher | zhejiang electric power |
| record_format | Article |
| series | Zhejiang dianli |
| spelling | doaj-art-7d759f9e8b454084a674582bac677a212025-08-20T02:47:28Zzhozhejiang electric powerZhejiang dianli1007-18812025-07-01447829210.19585/j.zjdl.2025070091007-1881（2025）07-0082-11An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppressionFANG Dongping0QIU Yang1CUI Jindong2FEI Lisong3TANG Fangjie4ZHAO Jiancheng5Zhejiang Dayou Industrial Co.， Ltd. Linping Branch， Hangzhou 311102， ChinaState Grid Linping Power Supply Company， Hangzhou 311100， ChinaNortheast Electric Power University， Jilin， Jilin 132012， ChinaZhejiang Dayou Industrial Co.， Ltd. Linping Branch， Hangzhou 311102， ChinaZhejiang Dayou Industrial Co.， Ltd. Linping Branch， Hangzhou 311102， ChinaState Grid Linping Power Supply Company， Hangzhou 311100， ChinaExisting capacitor voltage ripple suppression methods primarily rely on second-harmonic circulating current injection （SHCCI）. However， these methods often increase valve losses in modular multilevel converters （MMCs） ， degrading operational efficiency and reliability. To address this challenge， this paper first analyzes the capacitor voltage ripple characteristics of MMCs under optimal SHCCI and reveals the additional converter valve losses incurred by ripple suppression. For medium- and low-voltage MMCs employing carrier phase shift pulse width modulation （CPS-PWM）， a loss-reduction control strategy is proposed that explicitly considers capacitor voltage ripple suppression. Based on the optimization objectives and constraints of capacitor voltage ripple and valve loss， the bridge arm current is optimally controlled to eliminate the valve loss increment induced by ripple suppression while maintaining ripple suppression performance. Finally， a comparative analysis under multiple operating conditions is performed in MATLAB/Simulink to validate the accuracy of the valve loss characteristic analysis and the effectiveness of the proposed control strategy.https://zjdl.cbpt.cnki.net/portal/journal/portal/client/paper/5b584eb738e71b7eafd4582b6abe7821mmccapacitor voltage ripple suppressionshcciloss-reduction control strategy |
| spellingShingle | FANG Dongping QIU Yang CUI Jindong FEI Lisong TANG Fangjie ZHAO Jiancheng An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppression Zhejiang dianli mmc capacitor voltage ripple suppression shcci loss-reduction control strategy |
| title | An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppression |
| title_full | An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppression |
| title_fullStr | An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppression |
| title_full_unstemmed | An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppression |
| title_short | An optimal loss-reduction control strategy for MMC considering capacitor voltage ripple suppression |
| title_sort | optimal loss reduction control strategy for mmc considering capacitor voltage ripple suppression |
| topic | mmc capacitor voltage ripple suppression shcci loss-reduction control strategy |
| url | https://zjdl.cbpt.cnki.net/portal/journal/portal/client/paper/5b584eb738e71b7eafd4582b6abe7821 |
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