一种新的中长期电压稳定判据

A New Criterion for Long-term Voltage Stability

基于二次近似算法的实现及其对稳定域边界的刻画,提出一种新的中长期电压稳定判据,进而形成了一种基于稳定域边界近似的中长期电压稳定分析方法体系。在一个简单系统上的实例分析表明,所提出的中长期电压稳定分析方法易于计算机实现,且判稳准确度高,刻画的电压稳定域直观、清晰,因而具有较高的工程实用价值,可望有效判断大扰动后系统的中长期电压稳定性。

Based on the realization of quadratic approximation and its description of the stability region boundary,a new criterion for long-term voltage stability was proposed and then an analysis system of long-term voltage stability based on the stability region boundary approximation was formed.The example analysis of a simple system showed that the proposed analysis method for long-term voltage stability was easy-to-computer implementation;the accuracy is high and the described voltage stability region is intuitive and clear.Thus,this method has a high practical application value and can efficiently judge the long-term voltage stability of the system after large disturbance.