Design of a Four-Branch LCL-Type Grid-Connecting Interface for a Three-Phase, Four-Leg Active Power Filter
Compared with the three-phase, two-split-capacitor active power filter (3P2C-APF), the three-phase, four-leg active power filter (3P4L-APF) has been widely used in three-phase, four-wire grid utility for power quality control due to its numerous advantages, such as higher current output capability,...
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| Format: | Article |
| Language: | English |
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MDPI AG
2015-02-01
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| Series: | Energies |
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| Online Access: | http://www.mdpi.com/1996-1073/8/3/1606 |
| _version_ | 1811302422387097600 |
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| author | Wu Cao Kangli Liu Yongchao Ji Yigang Wang Jianfeng Zhao |
| author_facet | Wu Cao Kangli Liu Yongchao Ji Yigang Wang Jianfeng Zhao |
| author_sort | Wu Cao |
| collection | DOAJ |
| description | Compared with the three-phase, two-split-capacitor active power filter (3P2C-APF), the three-phase, four-leg active power filter (3P4L-APF) has been widely used in three-phase, four-wire grid utility for power quality control due to its numerous advantages, such as higher current output capability, particularly in phase N, lower current and easier voltage control on the DC-side. However, designing the grid-connecting interface, which is between the voltage source converter (VSC) and grid utility, is rather difficult due to the higher requirement for current ripple filtering in phase N, cross-coupling in four phases and lack of relevant design methodology and specification. In this paper, a four-branch LCL-type (4B-LCL) grid-connecting interface is proposed for 3P4L-APF, which features better current ripple filtering performance without decreasing the current output capability in all phases. First, this paper describes the mathematical models of 4B-LCL in the fully-complex-vector form from the zero and non-zero sequence perspective, resulting in two independent and uniform equivalent circuits without cross coupling terms. Then, the 4B-LCL parameter design method based on the most comprehensive performance index is proposed, including three main stages as the specification: performance index requirement determination, fulfillment of that requirement, and verification. Finally, the validity and effectiveness of the proposed design are proven by the simulated and experimental results of a 3P4L-APF with 4B-LCL. |
| first_indexed | 2024-04-13T07:27:38Z |
| format | Article |
| id | doaj.art-32edfc45d8344eadbefdc4e58c5967bd |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-04-13T07:27:38Z |
| publishDate | 2015-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-32edfc45d8344eadbefdc4e58c5967bd2022-12-22T02:56:26ZengMDPI AGEnergies1996-10732015-02-01831606162710.3390/en8031606en8031606Design of a Four-Branch LCL-Type Grid-Connecting Interface for a Three-Phase, Four-Leg Active Power FilterWu Cao0Kangli Liu1Yongchao Ji2Yigang Wang3Jianfeng Zhao4School of Electrical Engineering, Southeast University, No 2 Si Pai Lou, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, No 2 Si Pai Lou, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, No 2 Si Pai Lou, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, No 2 Si Pai Lou, Nanjing 210096, ChinaSchool of Electrical Engineering, Southeast University, No 2 Si Pai Lou, Nanjing 210096, ChinaCompared with the three-phase, two-split-capacitor active power filter (3P2C-APF), the three-phase, four-leg active power filter (3P4L-APF) has been widely used in three-phase, four-wire grid utility for power quality control due to its numerous advantages, such as higher current output capability, particularly in phase N, lower current and easier voltage control on the DC-side. However, designing the grid-connecting interface, which is between the voltage source converter (VSC) and grid utility, is rather difficult due to the higher requirement for current ripple filtering in phase N, cross-coupling in four phases and lack of relevant design methodology and specification. In this paper, a four-branch LCL-type (4B-LCL) grid-connecting interface is proposed for 3P4L-APF, which features better current ripple filtering performance without decreasing the current output capability in all phases. First, this paper describes the mathematical models of 4B-LCL in the fully-complex-vector form from the zero and non-zero sequence perspective, resulting in two independent and uniform equivalent circuits without cross coupling terms. Then, the 4B-LCL parameter design method based on the most comprehensive performance index is proposed, including three main stages as the specification: performance index requirement determination, fulfillment of that requirement, and verification. Finally, the validity and effectiveness of the proposed design are proven by the simulated and experimental results of a 3P4L-APF with 4B-LCL.http://www.mdpi.com/1996-1073/8/3/1606three-phase four-leg (3P4L)four-branch LCL (4B-LCL)grid-connectingactive power filter (APF)power quality (PQ)pulse-width-modulated (PWM) converter |
| spellingShingle | Wu Cao Kangli Liu Yongchao Ji Yigang Wang Jianfeng Zhao Design of a Four-Branch LCL-Type Grid-Connecting Interface for a Three-Phase, Four-Leg Active Power Filter Energies three-phase four-leg (3P4L) four-branch LCL (4B-LCL) grid-connecting active power filter (APF) power quality (PQ) pulse-width-modulated (PWM) converter |
| title | Design of a Four-Branch LCL-Type Grid-Connecting Interface for a Three-Phase, Four-Leg Active Power Filter |
| title_full | Design of a Four-Branch LCL-Type Grid-Connecting Interface for a Three-Phase, Four-Leg Active Power Filter |
| title_fullStr | Design of a Four-Branch LCL-Type Grid-Connecting Interface for a Three-Phase, Four-Leg Active Power Filter |
| title_full_unstemmed | Design of a Four-Branch LCL-Type Grid-Connecting Interface for a Three-Phase, Four-Leg Active Power Filter |
| title_short | Design of a Four-Branch LCL-Type Grid-Connecting Interface for a Three-Phase, Four-Leg Active Power Filter |
| title_sort | design of a four branch lcl type grid connecting interface for a three phase four leg active power filter |
| topic | three-phase four-leg (3P4L) four-branch LCL (4B-LCL) grid-connecting active power filter (APF) power quality (PQ) pulse-width-modulated (PWM) converter |
| url | http://www.mdpi.com/1996-1073/8/3/1606 |
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