不同位置子群风电场主导因素变化对次同步谐振特性影响程度比较  

Comparison of the Impact Level on Subsynchronous Resonance Characteristics of Dominant Factors by Multiple Wind Farms at Different Locations

作　　者：董晓亮[1] 侯金鸣[1] 田旭[2] 柳叶青[3] 

机构地区：[1]国家电网公司华北分部,北京100053 [2]中国矿业大学(北京)机电与信息工程学院,北京100083 [3]大连科技学院电气工程学院,大连116052

出　　处：《高电压技术》2016年第7期2259-2265,共7页High Voltage Engineering

摘　　要：为了说明不同位置的子群风电场变化同样的参数范围对整个大型风电场的次同步特性的影响程度不同。以华北地区某大型风电场双馈风机串补系统为研究背景,采用3台风机来等效实际中处于不同位置的3个子风电场群,建立了整个系统的线性化模型,利用参与因子确定了系统中的次同步谐振模态。着重比较了各子风电场群中转速、输出功率、风机台数以及线路参数等主导因素变化对整个系统次同步谐振特性的影响。结果表明:离汇流母线电气距越近的子风电场,变化同样的参数范围,对系统的稳定性影响越大。子风电场群中投入的风机数量对于次同步谐振特性的影响与风机的转速有关,呈非线性关系。各个子风电场群与汇流变电站之间的输电线路阻抗增大时,系统的稳定性增强,系统的谐振频率增大。We studied the influence level of wind farm clusters at different locations under the same parameter variation range. Taking a large doubly fed induction generator （DFIG） based series-compensated transmission system in North China as a prototype; we adopted three DFIGs to represent wind farm clusters at different locations and established a linearized model of the whole system. Subsynchronous resonance（SSR） modes were determined through a participation factor method. The impact levels of dominant factors, such as rotor speed, output power, number of DFIG, and line resistance, by multiple wind farms at different locations were compared. Results show that the wind farm cluster with shorter electrical distance from busbar has greater impact on system stability than wind farm cluster with longer distance under the same parameter variation range. The impact of the number of wind turbines which are put into operation is nonlinear and it depends on the rotor speed. System stability and resonance frequency increase as the impedance of transmission lines between wind farm clusters and collection bus increases.

关 键 词：子群风电场 双馈风机 次同步谐振 转速 输出功率 

分 类 号：TM614[电气工程—电力系统及自动化]