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Research on Active Damping Control Strategy for LCL Inverter in Weak Grid
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Hanwen WANG, Chengbi ZENG, Hong MIAO
Journal of Power Supply | 2024, 22(2) : 167 - 174
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Journal of Power Supply | 2024, 22(2): 167-174
• Renewable Energy System •
Research on Active Damping Control Strategy for LCL Inverter in Weak Grid
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Hanwen WANG, Chengbi ZENG, Hong MIAO
Affiliations
  • School of Electrical Engineering Sichuan University Chengdu 610065 China
Published: 2024-03-30 doi: 10.13234/j.issn.2095-2805.2024.2.167
Outline
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In a weak grid, due to the existence of grid impedance, the natural resonant frequency of a new energy grid-connected LCL filter will shift, and the traditional active damping control strategy cannot guarantee the system stability. Moreover, as the proportion of new energy power generation in the power system continues to grow, how to reduce the operating costs is a hot topic for research. Therefore, a novel control strategy based on grid-connected current and common coupling voltage feedback is proposed in this paper, which not only provides active damping to suppress LCL resonance, but also reduces the use of sensors. In addition, it has a strong adaptability under wide-ranging changes in grid impedance. Simulation and experimental results show that, compared with that under the traditional control strategy, the practical range of weak grid under the improved strategy increases, the system stability is enhanced, and the capability to suppress harmonics is raised, indicating that the quality of grid-connected current is well improved.

Weak grid  /  LCL filter  /  grid-connected inverter  /  active damping
Hanwen WANG, Chengbi ZENG, Hong MIAO. Research on Active Damping Control Strategy for LCL Inverter in Weak Grid[J]. Journal of Power Supply, 2024 , 22 (2) : 167 -174 . DOI: 10.13234/j.issn.2095-2805.2024.2.167
Funding
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  • National Science and Technology Program(2018YFC1505502-03)
  • Chengdu Science and Technology Program(2019-YF05-02107-SN)
  • Sichuan Science and Technology Program(21ZDYF3753)
Appendix
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Year 2024 volume 22 Issue 2
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348
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Article Info
doi: 10.13234/j.issn.2095-2805.2024.2.167
  • Receive Date：2021-05-21
  • Online Date：2025-07-21
  • Published：2024-03-30
Article Data
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History
  • Received：2021-05-21
  • Revised：2021-08-13
  • Accepted：2021-08-27
Funding
National Science and Technology Program(2018YFC1505502-03)
Chengdu Science and Technology Program(2019-YF05-02107-SN)
Sichuan Science and Technology Program(21ZDYF3753)
Affiliations
    School of Electrical Engineering Sichuan University Chengdu 610065 China
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Citations
表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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