Bypass Inductor Type LCL Filter Parameter Optimization for Three-Level Grid-Connected Converter
In the application of the three-level grid-connected system, passive damping is the most common method to keep the LCL filter working stably. However, in the case of high power density, the low switching frequency of the grid-connected converter results in the complexity of filter parameter design,...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-03-01
|
| Series: | Frontiers in Energy Research |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2022.852046/full |
| _version_ | 1818137343394054144 |
|---|---|
| author | Ning Li Shiqian Zhang Zihan Xiao Zhuoer An Yan Zhang Lin Jiang |
| author_facet | Ning Li Shiqian Zhang Zihan Xiao Zhuoer An Yan Zhang Lin Jiang |
| author_sort | Ning Li |
| collection | DOAJ |
| description | In the application of the three-level grid-connected system, passive damping is the most common method to keep the LCL filter working stably. However, in the case of high power density, the low switching frequency of the grid-connected converter results in the complexity of filter parameter design, and the increase in passive components leads to lower equipment utilization efficiency. To solve the above problems, based on the optimization of resonant frequency and system loss, this study proposes a set of LCL filter parameter design processes of a three-level neutral point clamped (NPC) converter, which can switch components freely and is easy to achieve. This study explores the theoretical evidence and application value of the proposed design, considering the influence of the current ripple and the reactive power limit. The design adopts the improved passive damping method to select the appropriate inductance ratio and impedance ratio to make the resonance frequency of the whole system and the extra loss of the system smaller. The simulation and experiments show that compared with the conventional method, the improved design method reduces the current THD of the grid side by 1.5% and the damping resistance loss by 0.17%. |
| first_indexed | 2024-12-11T09:54:48Z |
| format | Article |
| id | doaj.art-8be4ef8b34ed4586a247709983ea2ead |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-12-11T09:54:48Z |
| publishDate | 2022-03-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-8be4ef8b34ed4586a247709983ea2ead2022-12-22T01:12:17ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2022-03-011010.3389/fenrg.2022.852046852046Bypass Inductor Type LCL Filter Parameter Optimization for Three-Level Grid-Connected ConverterNing Li 0Shiqian Zhang 1Zihan Xiao 2Zhuoer An3Yan Zhang4Lin Jiang5School of Electrical Engineering, Xi’an University of Technology, Xi’an, ChinaSchool of Electrical Engineering, Xi’an University of Technology, Xi’an, ChinaSchool of Electrical Engineering, Xi’an University of Technology, Xi’an, ChinaSchool of Electrical Engineering, Xi’an University of Technology, Xi’an, ChinaSchool of Electrical Engineering, Xi’an Jiaotong University, Xi’an, ChinaDepartment of Electrical Engineering and Electronics, University of Liverpool, Liverpool, United KingdomIn the application of the three-level grid-connected system, passive damping is the most common method to keep the LCL filter working stably. However, in the case of high power density, the low switching frequency of the grid-connected converter results in the complexity of filter parameter design, and the increase in passive components leads to lower equipment utilization efficiency. To solve the above problems, based on the optimization of resonant frequency and system loss, this study proposes a set of LCL filter parameter design processes of a three-level neutral point clamped (NPC) converter, which can switch components freely and is easy to achieve. This study explores the theoretical evidence and application value of the proposed design, considering the influence of the current ripple and the reactive power limit. The design adopts the improved passive damping method to select the appropriate inductance ratio and impedance ratio to make the resonance frequency of the whole system and the extra loss of the system smaller. The simulation and experiments show that compared with the conventional method, the improved design method reduces the current THD of the grid side by 1.5% and the damping resistance loss by 0.17%.https://www.frontiersin.org/articles/10.3389/fenrg.2022.852046/fullLCL filterpassive dampingstabilityvoltage-source convertersbypass inductor |
| spellingShingle | Ning Li Shiqian Zhang Zihan Xiao Zhuoer An Yan Zhang Lin Jiang Bypass Inductor Type LCL Filter Parameter Optimization for Three-Level Grid-Connected Converter Frontiers in Energy Research LCL filter passive damping stability voltage-source converters bypass inductor |
| title | Bypass Inductor Type LCL Filter Parameter Optimization for Three-Level Grid-Connected Converter |
| title_full | Bypass Inductor Type LCL Filter Parameter Optimization for Three-Level Grid-Connected Converter |
| title_fullStr | Bypass Inductor Type LCL Filter Parameter Optimization for Three-Level Grid-Connected Converter |
| title_full_unstemmed | Bypass Inductor Type LCL Filter Parameter Optimization for Three-Level Grid-Connected Converter |
| title_short | Bypass Inductor Type LCL Filter Parameter Optimization for Three-Level Grid-Connected Converter |
| title_sort | bypass inductor type lcl filter parameter optimization for three level grid connected converter |
| topic | LCL filter passive damping stability voltage-source converters bypass inductor |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2022.852046/full |
| work_keys_str_mv | AT ningli bypassinductortypelclfilterparameteroptimizationforthreelevelgridconnectedconverter AT shiqianzhang bypassinductortypelclfilterparameteroptimizationforthreelevelgridconnectedconverter AT zihanxiao bypassinductortypelclfilterparameteroptimizationforthreelevelgridconnectedconverter AT zhuoeran bypassinductortypelclfilterparameteroptimizationforthreelevelgridconnectedconverter AT yanzhang bypassinductortypelclfilterparameteroptimizationforthreelevelgridconnectedconverter AT linjiang bypassinductortypelclfilterparameteroptimizationforthreelevelgridconnectedconverter |