基于新能源下混合风电场不同类型风机动态特性相似环节引起的振荡风险研究  

Study on the oscillation risk caused by similar dynamic characteristics of different types of wind turbines in hybrid wind farms based on new energy

作　　者：陈平[1] 杜文娟 CHEN Ping;DU Wenjuan(School of Electrical Engineering,Sichuan University,Chengdu 610065,China)

机构地区：[1]四川大学电气工程学院,成都610065

出　　处：《电测与仪表》2024年第12期114-124,共11页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(52077144)。

摘　　要：现有研究表明,在风电场中如果同一种类型风力发电机动态特性相似,随着风机数量的增加,风电机群产生的“集群效应(collective impact)”将给并网风电场带来振荡风险,严重时会诱发风电场的振荡失稳。在实际中,一个风电场有可能由不同类型的风力发电机组成,例如直驱风力发电机和双馈风力发电机。混合风电场中不同类型风机动态特性相似环节是否也会引起“集群效应”。文中先建立了混合风电场并入外部电力系统的线性化模型。然后报告了在混合风电场内不同类型风机的“集群效应”这一发现,展示了并网风机数量变化、风机动态环节特性差异和线路电抗对“集群效应”的影响。通过时域仿真验证了分析的正确性。研究结果表明:在由不同类型风机组成的混合风电场中,如果不同类型的风机中有特性相似的动态环节,它们也会产生“集群效应”,随着不同类型的风机数量的增加,混合风电场会发生振荡失稳。Existing research has shown that in wind farms,if the dynamic characteristics of wind turbines of the same type are similar,the increase in the number of wind turbines will lead to a"collective impact"among the turbine groups,posing oscillation risks to the grid-connected wind farm and potentially causing oscillation instability in severe cases.In practice,a wind farm may consist of different types of wind turbines,such as direct-drive and doubly-fed wind turbines.It raises the question of whether similar dynamic characteristics among different types of wind turbines in hybrid wind farm might also provoke a"collective impact".The paper first establishes a linearized model of the hybrid wind farm connected to the external power system.And then,it reports the finding of the"collective impact"among different types of wind turbine in the hybrid wind farm and demonstrates the influence of the change in the number of grid-connected wind turbines,the difference in dynamic link characteristics among wind turbines,and the line reactance on the"collective impact."The correctness of the analysis is verified through time-domain simulations.The results of the research suggest that in hybrid wind farm consisting of different types of wind turbines,if similar dynamic characteristics exist among these different types,they can indeed produce a"collective impact".With an increasing number of these different types of wind turbines,oscillatory instability can occur in the hybrid wind farm.

关 键 词：混合风电场 双馈风机 直驱风机 集群效应 

分 类 号：TM933[电气工程—电力电子与电力传动]