Transient synchronization stability of grid-forming renewable generation integrated via VSC-HVDC system considering current limitOA
Current limit control can protect converters from overcurrent damage during fault transient but may simultaneously deteriorate the transient synchronization stability.This paper focuses on the transient stability analysis and enhancement of the grid-forming renewable energy system integrated via a voltage source converter based high-voltage direct current(VSC-HVDC)link,considering current limit.First,the switched dynamic model of the studied system under current limit is developed.It is found that switching between voltage control mode and current restricted control mode occurs when the power angle difference between the renewable energy inverter and the VSC-HVDC rectifierreaches a specificvalue.Accordingly,the transient stability mechanism of the studied system is analyzed using the system''s power-angle curve,and the transient stability criterion is derived from the segmented equal-area criterion.On this basis,an optimal tuning strategy for the saturation current angle is further proposed to enhance the transient stability of the system.Simulation results verify the accuracy of the derived stability criterion and the effectiveness of the proposed parameter-tuning strategy.
Jiapeng Li;Shixing Zhao;Huaiyu Qi;Qiuyi Chen;Minghao Wang;Yujun Li;Zhengchun Du
School of Electrical Engineering,Xi''an Jiaotong University,Xi''an,710049,China State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an,710049,ChinaEHV company,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing,211102,ChinaSchool of Electrical Engineering,Xi''an Jiaotong University,Xi''an,710049,China State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an,710049,ChinaEHV company,State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing,211102,ChinaState Key Laboratory of Internet of Things for Smart City(UM),University of Macao,999078,Macao Special Administrative Region of China Department of Electrical and Computer Engineering,University of Macao,999078,Macao Special Administrative Region of ChinaSchool of Electrical Engineering,Xi''an Jiaotong University,Xi''an,710049,China State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an,710049,ChinaSchool of Electrical Engineering,Xi''an Jiaotong University,Xi''an,710049,China State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an,710049,China
信息技术与安全科学
Transient synchronization stabilityVirtual synchronous generatorCurrent limit controlSwitched dynamic systemSegmented equal-area criteria
《Smart Power & Energy Security》 2025 (4)
P.218-227,10
supported in part by the National Natural Science Foundation of China(No.52507144)in part by The Shaanxi Provincial Natural Science Foundation funds research projects in basic scientificareas(2025JC-YBQN-593)in part by the Science and Technology Development Fund(001/2024/SKL)the State Key Laboratory of Internet of Things for Smart City(University of Macao,China)Open Research Project(Ref.No.:SKL-IoTSC(UM)/ORP06/2026).
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