分区总负荷空间上电压稳定安全域的研究

Research on Voltage Stability Security Region in Area Total Load Space

提出了一种高维节点负荷空间到分区总负荷空间的电压稳定安全域降维方法。分区总负荷空间中的电压稳定安全域具有空间维数低,易于描述,便于实现电压稳定在线监测和控制等优点。应用切平面作为该域边界的局部近似,进行电压稳定性的实时监控,从而在保证计算精度的前提下节约计算代价。通过一种迭代搜索算法获取最敏感分区总负荷变化方向,此方向能够辅助运行调度人员进行电压安全监视,同时揭示出电压稳定敏感分区,为安全控制措施的制定及分区总负荷空间中电压稳定安全域的局部可视化表达提供有价值的信息。

A dimension reduction method of voltage stability security region was proposed through a map from high-dimensional node load space to area total load space. The voltage stability security region in area total load space has many merits, such as low dimension, simplified description, and easy implementation for voltage stability online assessment and control. By using tangent plane as local approximation of the security region boundary, computational cost for voltage stability online monitoring was greatly reduced on the premise of precision guarantee. The most sensitive area total load variation direction was acquired through an iterative searching algorithm. This direction helps dispatchers with voltage security monitoring. Moreover, voltage stability sensitive areas are revealed, which can benefit voltage security control measurement decision and local visualization of voltage stability security region in area total load space.