Fault ride-through strategy for grid-forming direct-driven wind power generator based on NSC-DVR
Electric Power Automation EquipmentVol. 45, Issue 9, Pages: 88-95(2025)
CLEAN ENERGY|更新时间:2025-09-09
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Fault ride-through strategy for grid-forming direct-driven wind power generator based on NSC-DVR
作者机构:
1.内蒙古工业大学 电力学院,内蒙古 呼和浩特 010080
2.华能新能源股份有限公司,北京 100036
3.华能新能源股份有限公司蒙西分公司,内蒙古 呼和浩特 010000
作者简介:
基金信息:
the National Natural Science Foundation of China(52367022);the Key R&D and Achievement Transformation Projects in Inner Mongolia Autonomous Region(2023YFHH0077);the Science and Technology Project of China Huaneng Group Co.,Ltd(HNKJ24-H117)
HANG Yuqi,REN Yongfeng,FENG Xiaodan,et al.Fault ride-through strategy for grid-forming direct-driven wind power generator based on NSC-DVR[J].Electric Power Automation Equipment,2025,45(09):88-95.
HANG Yuqi,REN Yongfeng,FENG Xiaodan,et al.Fault ride-through strategy for grid-forming direct-driven wind power generator based on NSC-DVR[J].Electric Power Automation Equipment,2025,45(09):88-95. DOI: 10.16081/j.epae.202506026.
Fault ride-through strategy for grid-forming direct-driven wind power generator based on NSC-DVR
Aiming at the problems of current over-limit,sudden power angle change,and insufficient reactive power support capability faced by grid-forming direct-driven wind turbine generator units during grid vol-tage faults,a novel topology and improved control strategy combining a nine-switch converter(NSC) with a dynamic voltage restorer(DVR) is proposed. A mathematical model of the topology structure is established,and an integrated control strategy enabling flexible grid connection through the NSC upper channel and dynamic voltage compensation through the NSC lower channel is formulated,critical parameters of virtual synchronous generator(VSG) are analyzed. Based on the dynamic adjustment of unbalanced power and the optimization of reactive power droop coefficient,the control strategy of VSG is improved,then the power angle oscillation and voltage deviation induced by faults can be adaptively compensated. A simulation model is built in Simulink to verify the effective of the scheme,the simulative results show that the scheme can effectively enhance the transient power angle stability and reactive active support capacity of wind turbine units under both symmetrical and asymmetrical power grid faults,reduce the risk of current over-limit,and significantly improve the fault ride-through and gird connection reliability of the system.
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