基于PSS/E的宁夏电网静态电压稳定研究

Research on static voltage stability of Ningxia electric power grid based on PSS/E

宁夏电网是西北电网的重要组成部分,在西北电网中属于受端。受负荷的迅猛增长的影响,宁夏电网的电压稳定问题日益突出。根据宁夏电网2006年度运行方式,对系统的静态电压稳定性进行分析。借助于PSS/E潮流分析程序,计算了宁夏电网正常运行方式和预想事故下的有功裕度指标和灵敏度指标,并排序比较指出宁夏电网的薄弱节点、薄弱区域和预想事故下系统电压稳定的削弱程度。分析所得结论将对电网安全运行和调度具有一定的指导作用。

Ningxia Electric Power Grid is at the power receive-side of NorthWest-China Electric System.With the fast development of economy, the power consumption in Ningxia region increases rapidly and constantly in recent years,therefore, the danger in voltage instability continuously exists.On the basis of operation schedule of Ningxia grid in 2006, the system static voltage stability is analyzed in this paper. By PSS/E power flow-analysis program, the criteria of the active power margin and the sensitivity for Ningxia network in terms of voltage stability analysis are calculated under both normal and fault prediction conditions separately. By comparison, the key nodes and the weak areas are indicated, and the system voltage stability under faults prediction is analyzed. The conclusions analyzed can be an instruction for secure operation and schedule.