山东电力技术2026，Vol.53Issue(5)：38-49,12.DOI:10.20097/j.cnki.issn1007-9904.250186
新能源并网变换器同步稳定分析及控制策略
Synchronous Stability Analysis and Control Strategy for Grid-connected Renewable Energy Converters
摘要
Abstract
With the growing penetration of renewable energy power generation in the power system,the synchronization stability problem of voltage source converter(VSC)has become increasingly prominent under fault conditions.To further reveal the synchronous instability mechanism of the VSC during faults and enhance its synchronous stability,this paper studies in detail the synchronous stability problem of VSC during the low voltage ride-through(LVRT).Firstly,referring to the synchronous generator(SG),the equivalent rotor swing equation of VSC is established.Consequently,the large/small disturbances synchronization stability mechanism of VSC can be revealed under a severe symmetric grid fault.The analysis results clearly show that the deep voltage sag,improper current instructions,large transmission line impedance,and inappropriate controller parameters would all deteriorate the synchronization stability of VSC.Furthermore,a synchronization stability improvement control strategy based on automatic voltage regulation is proposed,which can not only generate additional virtual torque,and virtual damping to enhance the the large disturbance synchronization stability of VSC,but also increase the damping ratio to improve the small disturbance synchronization stability of VSC.Finally,the simulation results validate the validity of the proposed strategy.关键词
新能源并网变换器/低电压穿越/大干扰同步稳定性/小干扰同步稳定性/同步稳定控制策略Key words
grid-connected renewable energy converters/low voltage ride-through/large disturbances synchronization stability/small disturbances synchronization stability/synchronous stability control strategy分类
信息技术与安全科学引用本文复制引用
凌武能,梁振成,熊莉,邓秋荃,朱益华,李成翔..新能源并网变换器同步稳定分析及控制策略[J].山东电力技术,2026,53(5):38-49,12.基金项目
国家重点研发计划(2023YFB4203200) （2023YFB4203200）
广西电网公司科技项目(046000KK52222034,046000KK52222038).National Key Research and Development Program of China(2023YFB4203200) （046000KK52222034,046000KK52222038）
Science and Technology Program of Guangxi Power Grid(046000KK52222034,046000KK52222038). （046000KK52222034,046000KK52222038）
