【摘要】 有载分接开关(OLTC)的调节特性和负荷特性对电力系统电压稳定性具有极大的影响。OLTC的负调压作用可能在负荷失稳之前发生,也可能在负荷失稳之后发生。文章通过分析系统平衡点研究了OLTC和负荷对电力系统电压稳定性的影响,指出电压失稳模式与系统不稳定平衡点的模式有关,因此,可以根据系统不稳定平衡点的不稳定流形判断系统电压的失稳模式。最后以一个简单电力系统为例,分析了系统参数变化对电压稳定性的影响。更多还原

【Abstract】 Both regulating characteristics of on-load tap changer(OLTC)and load characteristics greatly impact power system voltage stability. The reverse action of OLTC may emerge before or after the instability of load. By means of analyzing equilibrium points, the influence of OTLC and load on power system voltage stability is researched, and it is pointed out that the unstable modes of voltage are related to the modes of unstable equilibrium points (UEPs), therefore the unstable modes of voltage can be judged according to unstable manifold of UEPs. Taking a simple power system for example, the influence of variation of system parameters on voltage stability is analyzed.更多还原