电力建设2026，Vol.47Issue(1)：25-36,12.DOI:10.12204/j.issn.1000-7229.2026.01.003
基于布伦特迭代算法的构网型变流器频率支撑需求动态评估
Dynamic Evaluation of Frequency Support Requirements for Grid-Forming Converters Based on the Brent Iteration Algorithm
摘要
Abstract
[Objective]To enhance frequency stability in systems with a high penetration of converters,this paper investigates a dynamic evaluation and quantification method for determining the frequency support requirements of grid-forming(GFM)converters.[Methods]First,a multi-machine system frequency response model is developed by incorporating the power–frequency characteristics of coupled GFM converters.Second,considering both the rate of change of frequency(RoCoF)and the maximum transient frequency deviation under anticipated disturbances,a comprehensive assessment method is constructed to evaluate the frequency support requirements of GFM converters.Finally,based on the Brent iterative algorithm,the critical thresholds of virtual inertia and primary frequency regulation gain for GFM converters are dynamically assessed under various operating conditions.Based on the modified IEEE-39 bus system,multiple scenario-based case studies were conducted.[Results]The results show that the introduction of GFM converters can raise the minimum system frequency to 49.5 Hz,significantly enhancing system stability and highlighting the necessity of deploying GFM converters in highly power-electronic systems.Furthermore,a performance comparison of three algorithms demonstrates that the proposed iterative method requires only 11 iterations on average,reducing the iteration count by over 20%compared to traditional approaches,thereby validating the effectiveness of the proposed assessment method and iterative algorithm.[Conclusions]The proposed assessment method clarifies,from a system-level perspective,the frequency support requirements imposed by the grid on GFM converters,providing a theoretical foundation for their optimal allocation and parameter tuning.关键词
构网型/变流器/频率支撑/需求评估/布伦特迭代算法Key words
grid-forming/converter/frequency support/requirement evaluation/Brent iterative algorithm分类
信息技术与安全科学引用本文复制引用
杨凯璇,王学斌,宋锐,索心语,傅国斌,王澧森,文云峰..基于布伦特迭代算法的构网型变流器频率支撑需求动态评估[J].电力建设,2026,47(1):25-36,12.基金项目
国家自然科学基金项目(52077066) （52077066）
国网青海省电力公司科技项目(522807240005) This work is supported by the National Natural Science Foundation of China(No.52077066)and the Science and Technology Project of State Grid Qinghai Electric Power Company(No.522807240005). （522807240005）
