异构逆变器暂态交互特性分析与稳定运行域刻画
Transient interaction characterization and stable operation domain sculpting for heterogeneous inverters
葛平娟 1王丛 1徐海亮 1毛睿同1
作者信息
- 1. 中国石油大学(华东)新能源学院,山东 青岛 266580
- 折叠
摘要
为提升故障工况下异构逆变器并联系统的暂态稳定运行性能,提出了一种计及异构逆变器暂态交互特征的系数暂态稳定运行域优化方法.首先建立了异构逆变器并联系统暂态数学模型,借助功角曲线定性分析了GFL逆变器输出电流幅值、相位对GFM逆变器稳定性能的影响.然后,通过计算GFM逆变器极限切除时间(CCT),定量刻画GFL逆变器输出电流幅值、相位与GFM逆变器暂态稳定边界的映射关系.接着,计及根据GFL逆变器容量约束和GFM逆变器暂态稳定约束,计算得到GFL逆变器输出电流可行域.最后,仿真算例证明了理论分析的正确性.
Abstract
To improve the transient stability operation performance of heterogeneous inverter parallel systems under fault conditions,a system transient stability operation domain optimization method considering the transient interaction characteristics of heterogeneous inverters was proposed.A transient mathematical model of a parallel system of heterogeneous inverters was established.The impact of the output current amplitude and phase of grid-following(GFL)inverters on the stability performance of grid-forming(GFM)inverters was qualitatively analyzed using power angle curves.Then,by calculating the critical clearing time(CCT)of the GFM inverter,the mapping relationship between the output current amplitude and phase of the GFL inverter and the transient stability boundary of the GFM inverter was quantitatively characterized.Based on this,the stable operation domain of the GFL inverter output current was derived by taking into account the transient stability constraints of the GFM inverter and the capacity constraints of the GFL inverter.Finally,the correctness of the current feasible domain was verified by simulation.
关键词
跟网型逆变器/构网型逆变器/异构逆变器/暂态稳定性/暂态优化控制Key words
grid-following inverter/grid-forming inverter/heterogeneous inverters/transient stability/transient optimal control引用本文复制引用
出版年
2025
国家科技期刊平台
NSTL
万方数据