中国电机工程学报2025，Vol.45Issue(13)：4967-4979,中插3,14.DOI:10.13334/j.0258-8013.pcsee.242005
基于网络受扰响应的VSG单机并网系统暂态功角稳定紧急控制
Transient Stability Emergency Control of Single VSG Grid-connected System Based on Network Disturbed Response
摘要
Abstract
To address the large-disturbance power angle stability characteristics and stability control issues of virtual synchronous generators(VSGs),this study develops a VSG model incorporating dual constraints of overcurrent capability and maximum internal electromotive force amplitude.The model reveals the output power characteristics of VSGs under varying grid strengths,characterized by different short-circuit ratios(SCRs),and analyzes the spatial distribution patterns of node voltage magnitudes,phase angles,as well as active and reactive power responses in AC branches.Building on this analysis,two criteria for assessing the deterioration of VSG transient power angle stability are proposed,considering the distinct electrical behavior under different SCRs.Furthermore,an emergency control strategy is developed to enhance power angle stability.The validity of the proposed theoretical analysis and control strategy is verified through large-disturbance time-domain simulations on a single VSG-controlled grid-connected converter system.关键词
虚拟同步发电机/暂态稳定/功率特性/节点与支路响应/紧急控制Key words
virtual synchronous generator(VSG)/transient stability/power characteristic/node and branch response/emergency control分类
信息技术与安全科学引用本文复制引用
郑超,孙华东,张恒悦,杜毅..基于网络受扰响应的VSG单机并网系统暂态功角稳定紧急控制[J].中国电机工程学报,2025,45(13):4967-4979,中插3,14.基金项目
国家电网有限公司科技项目(5100-202355768A-3-5-YS). Science and Technology Project of State Grid Corporation of China(5100-202355768A-3-5-YS). （5100-202355768A-3-5-YS）
