电压稳定和同步稳定的关联性研究

基于小干扰分析方法,采用经典静态负荷模型,对电压稳定和同步稳定的关联性进行了研究.研究结果表明:不管采用哪种静态负荷模型,系统都具有相同的P-V曲线形状.在恒功率负荷模型下,极限传输功率点为三个鞍结分叉点的一个,系统的平衡点数目因为鞍结分叉的发生而变化复杂;而在恒电流和恒阻抗负荷模型下,极限传输功率点不再是鞍结分叉点.

Study of the Relationship between Voltage Stability and Synchronism Stability

Study the relationship between voltage stability and synchronism stability based on the classical static load model. The results shows that the system has the same P-Vcurve no matter which type of static load model is adopted。If adopt the constant power load model, the limit transient power point is one of the three saddle node bifurcation points, and the number of equilibrium point of the system changes in a complex way because of the occurrence of saddle node bifurcation. However the limit transient power point of the system is not the saddle node bifurcation point when the constant current or constant resistance load model is adopted.