适用于多源系统次同步振荡分析的图形化建模方法  

A Graphical Modeling Method Applied for Multi-Sources System Subsynchronous Oscillation Analysis

作　　者：赵书强[1] 李忍[1] 高本锋[1] 姚磊[1] 张瑞雪[1] Zhao Shuqiang;Li Ren;Gao Benfeng;Yao Lei;Zhang Ruixue(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University,Baoding 071003 China)

机构地区：[1]新能源电力系统国家重点实验室(华北电力大学),保定071003

出　　处：《电工技术学报》2017年第14期184-193,228,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金(51507064);河北省自然科学基金(E2017502075);中央高校基本科研业务费(2015MS84;2017XS116)资助项目

摘　　要：新能源电力系统的次同步振荡问题呈现出多源参与特性,风、光、火多电源并存场景下,采用传统方法建立多源系统的状态空间模型,实施难度较大。提出一种图形化建模方法,该方法基于由基本元件构成的图形化模型库(状态空间形式),可以直观地构建复杂系统状态空间模型,并可在源网接口处理上提供较大便利。所提方法在SSR第一标准模型上进行了准确性验证。此外,建立风火打捆经直流送出系统的状态空间模型,分析风电接入对火电机组轴系次同步扭振模式的影响。最后得出图形化建模方法相对于传统方法具有独立性强、灵活性高、可视性好和扩展性强的优点。Multi-sources have participated in the subsynchronous oscillation of renewable energypower system.Conventional approach for state space modeling of multi-sources system is difficult tobe employed in the situations where wind power,photovoltaic and thermal power operate parallelly.This paper presents a graphical modeling method,based on a graphical model library containing basicunits in the form of state space model.The proposed method can establish the state space according tocomplex system visually.In addition,it is more convenient for the source-to-grid interface processing.The study case of IEEE first benchmark model for subsynchrnous oscillation verified the proposedmethod.What’s more,a state space pertaining to the multi-sources system was modeled,where windpower bundled with thermal power transmitted through HVDC line.The influence of wind power onsubsynchronous torsional modes belonging to thermal generator was studied.The advantages ofgraphical modeling method over conventional approach are strong independence,high flexibility,goodvisibility and strong extensibility.

关 键 词：次同步振荡 状态空间 图形化建模 特征值分析法 

分 类 号：TM614[电气工程—电力系统及自动化]