Static instability mechanism and improved control method of renewable energy grid-connected system during low-voltage ride through
ANALYSIS AND RESEARCH|更新时间:2026-02-11
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Static instability mechanism and improved control method of renewable energy grid-connected system during low-voltage ride through
Electric Power Automation EquipmentVol. 46, Issue 3, Pages: 196-204(2026)
作者机构:
1.上海电力大学 电气工程学院,上海 200090
2.浙江大学 电气工程学院,浙江 杭州 310027
作者简介:
基金信息:
the 2030 Smart Grid National Science and Technology Major Project(2024ZD0801000);the Science and Technology Project of State Grid Zhejiang Electric Power Co.,Ltd(B311DS25000A)
JIN Weitao,LOU Yuntian,TANG Bo,et al.Static instability mechanism and improved control method of renewable energy grid-connected system during low-voltage ride through[J].Electric Power Automation Equipment,2026,46(03):196-204.
JIN Weitao,LOU Yuntian,TANG Bo,et al.Static instability mechanism and improved control method of renewable energy grid-connected system during low-voltage ride through[J].Electric Power Automation Equipment,2026,46(03):196-204. DOI: 10.16081/j.epae.202511013.
Static instability mechanism and improved control method of renewable energy grid-connected system during low-voltage ride through
Unreasonable current control characteristics of renewable energy during low-voltage ride through will lead to static instability in the grid-connected system. Therefore,based on the static equivalent mathematical model of renewable energy grid-connected system,the bifurcation types that cause instability of grid-connected system during low-voltage ride through control of renewable energy are revealed,and the influence laws of grid strength and renewable energy current control parameters on the evolution of bifurcation morpho-logy are analyzed. Based on the dynamic characteristics of the control link,the instability forms of renewable energy grid-connected system during low-voltage ride through are clarified,and an improved active current control method of renewable energy is proposed to effectively prevent system instability. The time-domain simulation results verify the effectiveness of the proposed control method in maintaining the stable operation of the grid-connected system during low-voltage ride through period.
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