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Standby control strategy for PV generation based on grid-forming inverter
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Xuejiao FU1, Denghui HU2, Zhanbiao LIU1, Laijun CHEN2, 3, Yangfan ZHANG1, Xiaoling SU2
Thermal Power Generation | 2024, 53(8) : 51 - 58
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Thermal Power Generation | 2024, 53(8): 51-58
• Operation control technology of grid-forming energy storage technology •
Standby control strategy for PV generation based on grid-forming inverter
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Xuejiao FU1, Denghui HU2, Zhanbiao LIU1, Laijun CHEN2, 3, Yangfan ZHANG1, Xiaoling SU2
Affiliations
  • 1.State Grid Jibei Electric Power Co., Ltd. Electric Power Research Institute, Beijing 100045, China
  • 2.Key Laboratory of Smart operation of New Energy Power System, Ministry of Education, Qinghai University, Xining 810016, China
  • 3.Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
Published: 2024-08-25 doi: 10.19666/j.rlfd.202405120
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The use of grid-forming inverters for grid-connection of photovoltaic units is the key to stable operation of the new energy grid in desert and gobi. The conventional PV load-shedding operation is greatly affected by irradiance and inaccurate power retention. To solve these problems, a PV active standby control strategy based on grid-configuration inverter is proposed. Firstly, a PV grid-connected structure containing reference and backup arrays is designed. Secondly, based on the two-stage PV topology, an active backup control is introduced at the front stage DC/DC and a grid-forming control strategy is introduced at the back stage DC/AC to realize active participation of PV units in grid frequency regulation. The control strategy introduces a constant DC capacitor voltage control to maintain the DC voltage while enhancing the inertia characteristics of the PV unit. Finally, the PV small signal model of the grid-forming inverter is established, and the influence of DC capacitor value on the PV frequency response is analyzed through the root trajectory. The simulation results verify the correctness and feasibility of the proposed control strategy.

PV active standby  /  grid-forming control  /  DC capacitor voltage control  /  frequency response  /  stability control
Xuejiao FU, Denghui HU, Zhanbiao LIU, Laijun CHEN, Yangfan ZHANG, Xiaoling SU. Standby control strategy for PV generation based on grid-forming inverter[J]. Thermal Power Generation, 2024 , 53 (8) : 51 -58 . DOI: 10.19666/j.rlfd.202405120
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  • Science and Technology Project of Headquarters of State Grid Corporation of China(5108-202218280A-2-305-XG)
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Year 2024 volume 53 Issue 8
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Article Info
doi: 10.19666/j.rlfd.202405120
  • Receive Date：2024-05-31
  • Online Date：2026-01-07
  • Published：2024-08-25
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  • Received：2024-05-31
Funding
Science and Technology Project of Headquarters of State Grid Corporation of China(5108-202218280A-2-305-XG)
Affiliations
    1.State Grid Jibei Electric Power Co., Ltd. Electric Power Research Institute, Beijing 100045, China
    2.Key Laboratory of Smart operation of New Energy Power System, Ministry of Education, Qinghai University, Xining 810016, China
    3.Department of Electrical Engineering, Tsinghua University, Beijing 100084, China
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https://castjournals.cast.org.cn/joweb/rlfd/EN/10.19666/j.rlfd.202405120
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