电力需求侧管理2026，Vol.28Issue(5)：60-67,8.DOI:10.3969/j.issn.1009-1831.2026.05.009
分布式新能源场站跟/构网变流器混联系统容量配比研究
Research on capacity allocation of hybrid grid-following and grid-forming converter systems in distributed renewable energy stations
摘要
Abstract
Oscillation instability is frequently induced by grid-following(GFL)converters under weak grid conditions.However,system sta-bility can be significantly enhanced by the integration of a certain proportion of grid-forming(GFM)converters within renewable energy sta-tions.Consequently,the capacity ratio of GFM to GFL converters is regarded as a critical factor governing system stability.To address this issue,an analytical capacity allocation model based on the critical short-circuit ratio(CSCR)is proposed.Initially,positive-and negative-sequence impedance models for both GFL and GFM converters are established to facilitate the analysis of sequence impedance characteris-tics.Subsequently,a three-port equivalent model of the hybrid grid-connected system is constructed,and the dominant control parameters affecting the interactive stability are accurately identified through sensitivity analysis.Furthermore,by integrating the generalized Nyquist stability criterion with the CSCR boundary conditions,an analytical model for the minimum GFM integration ratio,which strictly ensures the small-signal stability of the system,is rigorously derived.Finally,the validity of the theoretical analysis is verified through transient sim-ulations.As demonstrated by the results,the critical GFM capacity can be accurately calculated by the proposed analytical model,whereby the system's impedance crossover frequency is successfully driven rightward into the stable region.Through this configuration,the phase margin of the system is significantly improved,and the broadband interactive instability under weak grid conditions is effectively sup-pressed.关键词
跟网型/构网型/混联系统/临界短路比/主导参数Key words
grid-following/grid-forming/hybrid system/critical short-circuit ratio/dominant parameter分类
信息技术与安全科学引用本文复制引用
安然,袁晓玲,胡宇轩,刘皓明..分布式新能源场站跟/构网变流器混联系统容量配比研究[J].电力需求侧管理,2026,28(5):60-67,8.基金项目
国家自然科学基金资助项目(52207091) （52207091）
