摘要
为了对双馈风电场经串联补偿线路外送风电时引起的次同步振荡现象进行分析,根据风电场实际运行情况,建立了基于IEEE第一标准型的次同步振荡模型。首先运用频率扫描法筛选出具有潜在谐振风险的系统运行状态,其次在数学模型的基础上,运用特征值法进行系统的小干扰稳定性分析,对风电场独有的次同步振荡形式,次同步控制相互作用的作用机理进行了阐述,最后利用时域仿真方法分别分析和验证了风速、串联补偿度以及控制器参数对风电场次同步振荡的影响。仿真和分析结果表明,风速越小、串补度越高、RSC电流控制环比例和积分增益参数越大,越容易引起次同步振荡。
In order to analyze the sub-synchronous oscillation caused by wind power system interconnected with a series compensated electric network, according to the actual operation of the wind farm, a sub-synchronous oscillation model is established based on the IEEE first benchmark model.First the system running conditions which have the risk of a potential resonance are screened using the method of frequency scanning, secondly, on the basis of the mathematical model, the eigenvalue analysis is applied to the small signal stability of the system, SSCI mechanism is elaborated which is an unique sub-synchronous oscillation form of the wind farm. At last the time domain simulation method is utilized to analyze the influence of wind velocity, series compensation level and the parameters of the controller on the wind farm＇s sub-synchronous oscillation. The result shows that the lower wind velocity, the higher series compensation level and the greater gain of the RSC current control loop proportional and integral will cause the sub-synchronous oscillation easy.
出处
《可再生能源》
CAS
北大核心
2015年第12期1816-1824,共9页
Renewable Energy Resources
关键词
双馈风力机
次同步振荡
频率扫描法
特征值法
时域仿真法
doubly-fed induction generator
sub-synchronous oscillation
frequency scanning method
eigenvalue analysis
time-domain simulation method
