Method and system for simulating disconnection fault of overhead line system

The invention relates to a simulation method and system for a contact network disconnection fault. The positioning and diagnosis of the disconnection fault of the overhead line system mostly depend on a manual inspection mode, and the effectiveness, the timeliness and the accuracy cannot meet the current operation and management requirements. The method comprises the following steps: establishing a three-dimensional visualization model of the overhead line system; utilizing node information of the three-dimensional visualization model of the contact network to establish a finite element model of the contact network, and adding a disconnection fault in the finite element model of the contact network; and completing finite element dynamic simulation solution. According to the method, the broken line fault is simulated by deleting a finite element model unit at the broken line position and other equivalent modes, the change of each parameter and form of the contact network when the broken line fault occurs can b