摘要
目前针对直驱永磁风电场动态等值的研究相对较少,尤其是在分群时甚少考虑到机组受到扰动后的状态。参照双馈风电场"两维两机"的动态等值思路,探究了稳态维的机组原始功率和暂态维的机端电压跌落幅度对直驱永磁机组网侧控制器电流限幅环节动作时间的影响,限幅环节的动作将影响机组的有功动态特性,提出了用以上"两维"快速估算动作时间,再根据该时间聚类结果进行分群的动态等值方法。最后在仿真算例中比较了风电场分别以详细模型和等值模型表示时的动态响应,检验了动态等值前后全系统的小干扰稳定性和暂态稳定性是否发生变化,证明了该等值方法的有效性。
Nowadays,there are few studies on the dynamic equivalence of direct-driven permanent magnet synchronous generator (DDPMSG) based wind farm and little consideration for the state variables after the disturbance when classifying the units in the farm. Based on the idea of the dynamic equivalence of DFIG based wind farm with two-dimension and two-machine, the paper explores the influence of the unit primary power with steady dimension and the terminal voltage drop level with transient dimension on the current limiter action time of network-side controller for the DDPMSG,points out that the action has an impact on the dynamics characteristics of the active power, and proposes an equivalent method for estimating the action time by the two-dimension and then classifying the units based on the clustering results of the action time. Lastly,the dynamic responses of the wind farm, represented by detailed model and equivalent model respectively, are compared by using a simulation example,and whether or not the small-signal stability and transient stability of the system will change before and after the dynamic equivalence is tested,proving the validity of the equivalent method.
作者
方力
陆宇烨
FANG Li;LU Yuye(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China;State Grid Nanjing Power Supply Company,Nanjing 210000,China)
出处
《智慧电力》
北大核心
2019年第2期29-36,共8页
Smart Power
基金
国家自然科学基金资助项目(51837004)
111引智计划资助(B14022)~~
