基于母线故障引起电压暂降的关键母线和脆弱母线辨识

为了对电网母线电压暂降进行评估并指导规划、运行和改造,针对母线不同的故障类型,考虑了电网的各种运行方式,从母线故障造成的影响程度及受其它母线故障影响发生电压暂降的频次两个角度,建立了电网母线电压暂降评估指标,定义了母线关键度指标和母线脆弱度指标,通过这些指标确定电网中的关键母线和脆弱母线,对电网的运行方式和规划或改造方案进行评价,从而指导电网的规划、改造和优化运行。通过算例表明提出的指标是可行的。

Key busbars and vulnerable busbars identification based on voltage Sag Caused by Busbar Fault

In order to assess busbar voltage sags of power system to guide the planning, operation and transformation, busbar fault types and operation modes are considered, from two points of view, one point is the influence degree of busbar fault, and the other point is busbar influenced thing by other busbar fault, a group of indices to evaluate busbar voltage sags is presented, including busbar key degree indices and busbar vulnerable degree indices. and the best serious indices. With above indices, key busbars and vulnerable busbars could be found, operation mode, planning and transformation scheme could be evaluated. It is shown that the definition of indices is a useful approach to guide the grid planning, transformation and operation. An example is given showing that the proposed approach is feasible.