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Mechanism Analysis of DC-side Voltage Dip of PV Inverters After Fault Recovery at Sending End of Large-scale PV Base Transmission via VSC-HVDC
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Shuhao SHEN1, Qing ZHONG  Member, CPSS1, Junjie FENG2, 3, Haifeng LI1, Longjun WANG1, Gang WANG1
Journal of Power Supply | 2025, 23(3) : 116 - 125
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Journal of Power Supply | 2025, 23(3): 116-125
• Special Issue on Analysis and Control of Power Quality in New Power Systems •
Mechanism Analysis of DC-side Voltage Dip of PV Inverters After Fault Recovery at Sending End of Large-scale PV Base Transmission via VSC-HVDC
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Shuhao SHEN1, Qing ZHONG  Member, CPSS1, Junjie FENG2, 3, Haifeng LI1, Longjun WANG1, Gang WANG1
Affiliations
  • 1.School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, China
  • 2.State Key Laboratory of HVDC, Electric Power Research Institute, China Southern Power Grid Co., Ltd., Guangzhou 510663, China
  • 3.State Key Laboratory of Advanced Electromagnetic Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Published: 2025-05-30 doi: 10.13234/j.issn.2095-2805.2025.3.116
Outline
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There are extensive ranges and long electrical distances in the sending-end system of the large-scale photovoltaic (PV) base transmission by VSC-HVDC. A voltage dip will occur on the DC side of PV inverters after the short-circuit fault recovery at the sending-end, which is a new power quality problem the new power system faces. Aimed at this issue, the impact of the balance between output powers from PV arrays and inverters on the DC-side voltage is analyzed at first, and the voltage-power characteristics of PV arrays and the output power characteristics of inverters under different control strategies are mainly taken into consideration. Second, four kinds of operating conditions for inverters are formulated according to the operating point of PV arrays and the control strategies for PV inverters, and the evolution characteristics of DC-side voltage of inverters under each operating condition are also analyzed. It is revealed the mechanism is combined effects of movements of the operation point of PV arrays and the changes of control strategies of the inverter because of the power imbalance during the fault recovery. Finally, simulations are performed, and results verify the correctness of the mechanism analysis.

Power quality  /  DC-side voltage dip  /  large-scale photovoltaic (PV) base  /  VSC-HVDC transmission system
沈枢昊, 钟庆中国电源学会会员, 冯俊杰, 李海锋, 汪隆君, 王钢. 大规模光伏基地柔直外送系统送端故障恢复后光伏逆变器直流侧电压跌落机理分析. 电源学报, 2025 , 23 (3) : 116 -125 . DOI: 10.13234/j.issn.2095-2805.2025.3.116
Shuhao SHEN, Qing ZHONG, Junjie FENG, Haifeng LI, Longjun WANG, Gang WANG. Mechanism Analysis of DC-side Voltage Dip of PV Inverters After Fault Recovery at Sending End of Large-scale PV Base Transmission via VSC-HVDC[J]. Journal of Power Supply, 2025 , 23 (3) : 116 -125 . DOI: 10.13234/j.issn.2095-2805.2025.3.116
Funding
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  • National Natural Science Foundation of China(52077082)
  • Science and Technical Project of China Southern Power Grid Co., Ltd.(YNKJXM20222288)
Appendix
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Year 2025 volume 23 Issue 3
64
11
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Article Info
doi: 10.13234/j.issn.2095-2805.2025.3.116
  • Receive Date：2024-11-20
  • Online Date：2026-10-26
  • Published：2025-05-30
Article Data
Affiliations
History
  • Received：2024-11-20
  • Revised：2025-02-02
  • Accepted：2025-02-28
Funding
National Natural Science Foundation of China(52077082)
Science and Technical Project of China Southern Power Grid Co., Ltd.(YNKJXM20222288)
Affiliations
    1.School of Electric Power Engineering, South China University of Technology, Guangzhou 510641, China
    2.State Key Laboratory of HVDC, Electric Power Research Institute, China Southern Power Grid Co., Ltd., Guangzhou 510663, China
    3.State Key Laboratory of Advanced Electromagnetic Technology, Huazhong University of Science and Technology, Wuhan 430074, China
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https://castjournals.cast.org.cn/joweb/dyxb/EN/10.13234/j.issn.2095-2805.2025.3.116
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