大容量直驱风机集群经柔直并网引起的次同步振荡概率评估
Probabilistic Assessment of Sub-Synchronous Oscillation Induced by Grid Integration of Large-Capacity Permanent Magnet Synchronous Generators Through Flexible DC Transmission
冯启睿 1魏书荣1
作者信息
- 1. 教育部海上风电技术工程研究中心(上海电力大学),上海 200090
- 折叠
摘要
针对海上风电集群经多端柔直并网时的次同步振荡(SSO)频发问题,提出了一种基于Weibull分布模型和带漏项最小均方算法的SSO概率评估方法,分析了大容量直驱风机集群经柔直并网引起的SSO变化特性.仿真结果表明:风速增加使SSO频率由40 Hz下降至18 Hz附近,负阻尼比累计概率由14%增至90%;构成风电场的等值风机台数增加与多端柔直并网可以扩展SSO频率分布区间,并降低1%～8%的SSO负阻尼比累计概率.
Abstract
Addressing frequent sub-synchronous oscillations(SSO)in multi-terminal VSC-HVDC integrated offshore wind clusters,a probabilistic assessment method using the Weibull distribution and a Leaky Least Mean Squares algorithm is proposed to explore SSO dynamics in large-capacity direct-drive wind farms.Findings reveal that increased wind speeds shift SSO frequencies from 40 Hz to around 18 Hz,and the cumulative probability of negative damping ratios rises from 14%to 90%.More turbines and multi-terminal integration expand the SSO frequency range and reduce negative damping cumulative probabilities by 1%～8%,offering guidance for large-scale offshore wind integration.
关键词
直驱风机/柔直输电/次同步振荡/小信号建模Key words
permanent magnet synchronous generator/flexible direct current transmission/sub-synchronous oscillation/small-signal modeling引用本文复制引用
出版年
2024
NETL
NSTL
万方数据