【摘要】 考虑10 kV配电线路多分支、网络复杂的结构特点,首先建立常见的树枝状分支结构模型,针对T型架空线路结构,提出故障初测速度的概念;然后通过比较分析初测速度与实际波速度间大小关系,提出基于波速度比较的架空线故障选段方法;最后依靠双端行波测距方法,确定具体故障位置。PSCAD仿真结果证明,所提定位方法能有效确定故障区段,并准确定位故障位置,满足定位可靠性要求。更多还原

【Abstract】 The 10 kV distribution system is usually complex for a large number of branches connected which causes difficulties in fault positioning.A concept of the fault initial measuring speed is proposed by reducing the complexity of the common branched structure model by sectioning the system into several T type overhead line equivalency.Then,by comparing and analyzing the relation between the size of the real wave velocity and the actual wave velocity,the fault selection section of the overhead line with the wave velocity comparison is put forward.Finally,the fault location is determined by the dual terminal traveling wave location method.PSCAD simulation results show that the location method can effectively select the fault section and locate the fault location accurately,so as to meet the positioning reliability requirements.更多还原