风电系统中异步电机机电模式研究  

Electromechanical modes of induction generators in wind power systems

作　　者：李生虎[1] 刘正楷[1] 杨振林[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《电力系统保护与控制》2010年第21期6-11,18,共7页Power System Protection and Control

基　　金：教育部新世纪人才支持计划(NCET-08-0765);国家自然科学基金项目(50707006)

摘　　要：随着风电容量的增加,异步电机对同步电网动态特性的影响更加明显。提出在五阶异步电机模型中,计及定子电压相角变化引起的定子频率变化。将振荡模式对状态变量的参与因子按同步和异步电机类型分类,修改机电回路相关比定义以判别异步电机机电振荡模式。采用Prony算法,提取异步电机振荡曲线的特征参数。静态稳定和时域仿真得到的机电振荡模式,都证明了异步发电机比同步发电机更容易导致非失步振荡过程。With more wind power integrated,the induction generators will have more remarkable effect on the synchronous system dynamics.The stator frequency variation due to the change of the stator voltage angle is included into the 5th order model for the induction generators.The participation factors of the oscillation modes to the state variables are classified by the facilities,and the electromechanical loop participation ratio is modified to determine the electromechanical oscillation mode of the induction generator.The Prony algorithm is applied to extract the characteristic parameters of the oscillation curve of the induction generators.The electromechanical modes from both the steady-state stability and the time-domain analysis validate that the induction generators are more vulnerable to lead to the non-out-of-step electromechanical oscillations comparing with the synchronous generators.

关 键 词：异步发电机 机电模式 机电回路相关比 PRONY分析 

分 类 号：TM343[电气工程—电机]