基于分频器理论的新能源电网暂态频率稳定分析方法  

A transient frequency stability analysis method for new energy grid based on frequency divider theory

作　　者：雷傲宇 苏婷婷 梅勇[1] 刘子祺 王裕 吴为 LEI Aoyu;SU Tingting;MEI Yong;LIU Ziqi;WANG Yu;WU Wei(CSG Power Dispatching Control Center,Guangzhou 510663,China.;School of Automation,Guangdong University of Technology,Guangzhou 510006,China.;Electrical Power Research Institute,CSG,Guangzhou 510663,China)

机构地区：[1]中国南方电网电力调度中心,广州510663 [2]广东工业大学自动化学院,广州510006 [3]南方电网科学研究院,广州510663

出　　处：《电测与仪表》2024年第4期132-140,共9页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(62273104);中国南方电网公司科技项目(0000002022030101FK00007);广东省自然科学资基金资助项目(2021A1515012398,2022A1515011079)。

摘　　要：在分析输配电线路频率相关参数时,将频率固定为额定值的时域仿真法是电力系统暂态频率稳定分析的常用方法。然而,随着新能源比例不断提升,电网各节点频率时空分布差异更为显著,已有传统数值微分频率分析方法难以保证分析精度。因此,文中提出一种基于分频器理论的新型电力系统暂态频率分析方法。与传统频率分析方法相比,该方法所得节点频率可随节点间电气距离变化而改变,在暂态过程中可更准确地刻画瞬态条件,实现各节点实时频率准确获取。通过建立简单含风电的三端系统,分析了基于分频器理论的实现方式,通过仿真验证了所提方法的正确性和优越性,可为新型电力系统频率稳定分析和控制设计提供新的思路和参考方案。During the analysis of frequency related parameters of transmission and distribution lines,the time-domain simulation method which fixed the frequency as the rated value is a common method for the transient frequency stability analysis of power systems.However,as the continuous increasing proportion of new energy,the spatial and temporal distribution difference of each node of the power grid is more significant,and the existing traditional numerical differential frequency analysis method is difficult to guarantee the analysis accuracy.Therefore,a transient frequency analysis method of novel power system based on frequency divider theory is proposed in this paper.Compared with the traditional frequency analysis method,the node frequency obtained by this method can change with the variation of electrical distance between nodes,and the transient conditions can be described more accurately in the transient process,and the real-time frequency of each node can be accurately obtained.Through the establishment of a simple three-terminal system containing wind power,the realization method based on the frequency divider theory is analyzed,and the correctness and superiority of the proposed method are verified by simulation,which can provide a new idea and reference scheme for frequency stability analysis and control design of novel power systems.

关 键 词：暂态频率稳定 新能源电网 分频器理论 分析方法 

分 类 号：TM712[电气工程—电力系统及自动化]