中小型电站动态稳定分析模型及其工程应用

Dynamic Stability Analysis Model and Its Application in Medium and Small Power Station

在分析中小型电站的主接线特点、给出不同主接线方式下同步发电机定子电流统一表达式的基础上建立了中小型多机电站的动态稳定分析模型 ,这一模型可用于包括扩大发电机—变压器组单元接线在内的多种主接线方式多机电站的动态稳定分析 ,扩展了常规Phillips -HeffronK1～K6模型的应用范围。基于该模型采用特征根方法 ,对某水电站单机运行稳定 ,双机运行时出现地区性低频振荡进行了分析 ,所得结果与现场实际情况相一致。

A dynamic analysis model for medium and small power stations is established according to the particular characteristics of main electric connection modes. This model can be used for the dynamic stability analysis of multi machine stations with several main electric connection modes including extended generator transformer units. It extends the application range of conventional Phillips Heffron K 1～K 6 model. Based on the presented model and adopting the eigenvalue analysis, the local low frequency oscillation between a hydroelectric station and system is analyzed. Obtained results coincide with the practical situations.