Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid
In a distributed generation system, the all-pass-filter phase-locked loop (APF-PLL) is a commonly used method for grid synchronization. However, the coupling effect between APF-PLL and current control loop increases the risk of oscillation instability for the inverter in the weak grid. At present, t...
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| Format: | Article |
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MDPI AG
2022-10-01
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| Serier: | Energies |
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| Online adgang: | https://www.mdpi.com/1996-1073/15/19/7355 |
| _version_ | 1827654543484125184 |
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| author | Longyue Yang Tian Cao Huapeng Chen Xinwei Dong Shuyuan Zhang |
| author_facet | Longyue Yang Tian Cao Huapeng Chen Xinwei Dong Shuyuan Zhang |
| author_sort | Longyue Yang |
| collection | DOAJ |
| description | In a distributed generation system, the all-pass-filter phase-locked loop (APF-PLL) is a commonly used method for grid synchronization. However, the coupling effect between APF-PLL and current control loop increases the risk of oscillation instability for the inverter in the weak grid. At present, there are few effective methods to solve the adverse effect of APF-PLL on the inverter-grid interconnection system in the weak grid. Therefore, a small-signal impedance model of the inverter considering the dual <i>d-q</i> frame brought by APF-PLL is first established. Then the reason for the inverter instability caused by APF-PLL in the weak grid is analyzed. Subsequently, an impedance reshaping method based on a modified first-order filter PLL with a complex coefficient filter (CCF-MFOF-PLL) and its parameter optimization design method are proposed. Finally, the experimental results verify that the proposed method widens the stable range of the inverter and ensures the stable operation of the inverter even with the large grid impedance. |
| first_indexed | 2024-03-09T21:46:31Z |
| format | Article |
| id | doaj.art-e9e5cfbbff784f08b9bc9e3e7067c74d |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T21:46:31Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-e9e5cfbbff784f08b9bc9e3e7067c74d2023-11-23T20:17:36ZengMDPI AGEnergies1996-10732022-10-011519735510.3390/en15197355Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak GridLongyue Yang0Tian Cao1Huapeng Chen2Xinwei Dong3Shuyuan Zhang4School of Electrical Engineering, China University of Mining and Technology, University Road 1, Xuzhou 221116, ChinaSchool of Electrical Engineering, China University of Mining and Technology, University Road 1, Xuzhou 221116, ChinaSchool of Electrical Engineering, China University of Mining and Technology, University Road 1, Xuzhou 221116, ChinaSchool of Electrical Engineering, China University of Mining and Technology, University Road 1, Xuzhou 221116, ChinaSchool of Electrical Engineering, Shenyang University of Technology, Shen Liao West Road 111, Shenyang 110027, ChinaIn a distributed generation system, the all-pass-filter phase-locked loop (APF-PLL) is a commonly used method for grid synchronization. However, the coupling effect between APF-PLL and current control loop increases the risk of oscillation instability for the inverter in the weak grid. At present, there are few effective methods to solve the adverse effect of APF-PLL on the inverter-grid interconnection system in the weak grid. Therefore, a small-signal impedance model of the inverter considering the dual <i>d-q</i> frame brought by APF-PLL is first established. Then the reason for the inverter instability caused by APF-PLL in the weak grid is analyzed. Subsequently, an impedance reshaping method based on a modified first-order filter PLL with a complex coefficient filter (CCF-MFOF-PLL) and its parameter optimization design method are proposed. Finally, the experimental results verify that the proposed method widens the stable range of the inverter and ensures the stable operation of the inverter even with the large grid impedance.https://www.mdpi.com/1996-1073/15/19/7355grid-connected inverter (GCI)phase-locked loop (PLL)complex coefficient filter (CCF)weak gridrobustness |
| spellingShingle | Longyue Yang Tian Cao Huapeng Chen Xinwei Dong Shuyuan Zhang Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid Energies grid-connected inverter (GCI) phase-locked loop (PLL) complex coefficient filter (CCF) weak grid robustness |
| title | Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid |
| title_full | Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid |
| title_fullStr | Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid |
| title_full_unstemmed | Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid |
| title_short | Robust Control and Optimization Method for Single-Phase Grid-Connected Inverters Based on All-Pass-Filter Phase-Locked Loop in Weak Grid |
| title_sort | robust control and optimization method for single phase grid connected inverters based on all pass filter phase locked loop in weak grid |
| topic | grid-connected inverter (GCI) phase-locked loop (PLL) complex coefficient filter (CCF) weak grid robustness |
| url | https://www.mdpi.com/1996-1073/15/19/7355 |
| work_keys_str_mv | AT longyueyang robustcontrolandoptimizationmethodforsinglephasegridconnectedinvertersbasedonallpassfilterphaselockedloopinweakgrid AT tiancao robustcontrolandoptimizationmethodforsinglephasegridconnectedinvertersbasedonallpassfilterphaselockedloopinweakgrid AT huapengchen robustcontrolandoptimizationmethodforsinglephasegridconnectedinvertersbasedonallpassfilterphaselockedloopinweakgrid AT xinweidong robustcontrolandoptimizationmethodforsinglephasegridconnectedinvertersbasedonallpassfilterphaselockedloopinweakgrid AT shuyuanzhang robustcontrolandoptimizationmethodforsinglephasegridconnectedinvertersbasedonallpassfilterphaselockedloopinweakgrid |