中国电机工程学报2025，Vol.45Issue(22)：8730-8741,中插5,13.DOI:10.13334/j.0258-8013.pcsee.250383
新能源变流器多机并联系统暂态同步稳定性评估与参数优化
Transient Synchronization Stability Assessment and Parameter Design of Multiple Paralleled Renewable Energy Converter Systems
摘要
Abstract
Under the short-circuit fault of weak grids,the interaction in the multiple paralleled renewable energy converter system is complex,and transient synchronization instability may occur due to the loss of equilibrium point.Existing studies assume the output current is constant and ignore the influence of transient reactive power support control,resulting in unclear instability mechanisms and inaccurate stability assessments.Regarding this,this paper establishes a transient analysis model for the multiple paralleled renewable energy converter system considering reactive power support control.The impact of factors such as the reactive current coefficient,current limit amplitude,line impedance,and grid fault depth on transient synchronization stability is analyzed.Then,the transient synchronization stability evaluation method and stability margin index for the system are proposed,and the impact of the above factors on the existence of the equilibrium point is quantitatively analyzed.In addition,the feasible region for multi-converter control instruction under transient stability constraints is constructed,and a transient synchronous stability control method based on control parameter optimization is proposed accordingly.Finally,the theoretical analysis and the control method is verified by the hardware-in-the-loop experiment.关键词
新能源变流器多机并联系统/无功支撑控制/暂态同步稳定/控制参数优化Key words
multiple paralleled renewable energy converter system/reactive power support control/transient synchronization stability/control parameter optimization分类
信息技术与安全科学引用本文复制引用
ZHU Donghai,LI Xiangjinwen,WANG Yukun,ZOU Xudong,KANG Yong..新能源变流器多机并联系统暂态同步稳定性评估与参数优化[J].中国电机工程学报,2025,45(22):8730-8741,中插5,13.基金项目
湖北省自然科学基金项目(青年项目)(2025AFA102). Project Supported by Natural Science Foundation of Hubei Province(Young Project)(2025AFA102). （青年项目）
