考虑动态风电模型极限诱导分岔研究  

The research of limit induced bifurcation in dynamic model of wind power system

作　　者：刘阳[1,2] 刘俊勇[1,2] 张思明 王民昆[4] 

机构地区：[1]智能电网四川省重点实验室,四川成都610065 [2]四川大学电气信息学院,四川成都610065 [3]University of Liverpool [4]四川电力调度中心,四川成都610041

出　　处：《电力系统保护与控制》2011年第18期116-121,154,共7页Power System Protection and Control

基　　金：国家自然科学基金项目(50977059)~~

摘　　要：构建动态风力发电系统的极限诱导分岔模型,利用其搜索WSCC-9Bus系统中接入风电场的极限诱导分岔点。针对风电场在不同风速下,利用准静态分析法计算优化模型初值,搜索风电系统稳定流形的极限诱导分岔。研究表明,随风速的增加,能增加系统负荷裕度,但此时系统易发生极限诱导分岔;并且,当风电系统具有较大的动态设备运行极限时,风速波动大,将导致系统分岔类型在鞍结点分岔和极限诱导分岔之间转换,易造成系统电压崩溃。In this paper, the dynamic model for limit induced bifurcation in wind power systems is constructed, and it is used to locate the bifurcation point in WSCC--9Bus system with wind farms connected. For the sake of system stability, the limit induced bifurcation is investigated under different wind speed conditions. Moreover, the initial condition of an optimal model is calculated through the method of Quasi Steady-State Analysis（QSS）. It is safe to conclude that wind farms operating with increasing wind velocity can increase the load margins. Therefore, high wind speed more easily leads to limit induced bifurcation. The wind system with large hard-limit for dynamic devices and large fluctuations in wind speed can lead to transformation between limit induced bifurcation and saddle node bifurcation, which more easily leads to voltage collapse.

关 键 词：风力发电 极限诱导分岔 负荷裕度 准静态 电压崩溃 

分 类 号：TM712[电气工程—电力系统及自动化]