摘要
大规模风电机组并网使得电力系统等效惯量迅速下降,系统惯量逐渐接近临界水平,系统频率运行安全受到影响。为量化计算含大规模风电电力系统的最小惯量需求,文章首先基于经典系统频率响应(System Frequency Response,SFR)模型,建立了考虑大规模风电并网的SFR模型。首先,基于改进的SFR模型量化推导电力系统初始频率变化率、频率最低点等频率特征指标;其次,计算了风电场等效虚拟惯量,并结合电力系统惯量理论量化分析含大规模风电电力系统的理论惯量和计算惯量;再次,以动态频率特征为约束,提出含大规模风电电力系统最小惯量需求评估流程;最后,利用Matlab/Simulink对所提评估方法进行验证。
The large-scale integration of wind turbines into the grid leads to a rapid decrease in the equivalent inertia of the power system,and the system inertia gradually approaches the critical level,greatly affecting the safety of frequency operation.To quantify the minimum inertia requirement of large-scale wind power systems,this article first establishes an SFR model considering large-scale wind power grid integration based on the classical System Frequency Response(SFR)model.Quantitatively derive frequency characteristic indicators such as initial frequency change rate and frequency minimum point of power system based on improved SFR model;Secondly,the equivalent virtual inertia of the wind farm was calculated,and the theoretical inertia and calculated inertia of the large-scale wind power system were quantitatively analyzed in combination with the inertia theory of the power system;Once again,constrained by dynamic frequency characteristics,a minimum inertia requirement assessment process for large-scale wind power systems is proposed;Finally,the proposed evaluation method was validated using Matlab/Simulink.
作者
蔡晖
彭竹弈
许偲轩
孙文涛
王琦
Cai Hui;Peng Zhuyi;Xu Sixuan;Sun Wentao;Wang Qi(State Grid Jiangsu Electric Power Co.,Ltd.,Economic and Technological Research Institute,Nanjing 210008,China;School of Electrical Engineering,Southeast University,Nanjing 210096,China)
出处
《可再生能源》
北大核心
2025年第6期812-819,共8页
Renewable Energy Resources
基金
国家自然科学基金项目(52261145704)。
关键词
风电机组并网
等效惯量
最小惯量需求
SFR模型
wind power integration
equivalent inertia
minimum inertia requirement
SFR model
