基于负荷扰动的电压失稳与潮流崩溃的机理分析

Mechanism Analysis of Voltage instability and Power Flow Collapse Besed on Load Disturbance

针对电力系统静态电压稳定问题,采用简单交流电路方程组的几何分析,得出临界电压崩溃潮流的电压电流特性,并利用该特性分析了不同类型负荷作用下系统电压和潮流变化情况,从而为调度人员提供防止电压失稳、规避电压崩溃的理论依据。

Aiming at the stability problem of static state voltage in electric power system,adopting the geometric analysis of simple AC circuit equation group,the author obtained the V-I characteristic of critical collapse power flow,and presented a method to identify the weak branch in power system by means of increasing the active power or reactive power of load using this characteristic under the condition of load disturbance.Thereby a theoretical evidence to prevent voltage instability and to evade voltage collapse could be provided to the operators and dispatchers.