Distribution automation system based ground fault line selection method

Abstract

The invention relates to a distribution automation system based ground fault line selection method belongs to the field of power system distribution automation. The method comprises the following steps: a distribution automation main station system receiving such multivariate data as a line selection result of an EMS, transformer station remote measurement remote signaling data, machine accounts and the like; the distribution automation main station system, when receiving line selection signals of bus grounding, feed line grounding and an arc extinguishing apparatus, starting ground determining; the distribution automation main station system discriminating a ground fault through waiting for basic data of collection full-ground line selection; the distribution automation main station system, according to machine account data, generating a low-current ground fault switching-off sequence table of a ground station; and the distribution automation main station system sending information of the ground station and the switching-off sequence table to a man-machine interface to display the information so that a dispatcher can use the information and the table. By use of the distribution automation system ground fault line selection method, the effectiveness and the intelligence in a ground fault first-aid repair process are improved, and the work efficiency of first-aid repair of a distribution network is greatly improved; and the method has great significance for reducing power failure influences and improving power supply reliability.

Description

technical field [0001] The invention belongs to the field of power system distribution automation, and in particular relates to a method for line selection based on a ground loss fault of a power distribution automation system. Background technique [0002] At present, for the distribution network whose neutral point is not grounded or grounded by the arc suppression device, it can keep running for 2 hours when a ground fault occurs. When the distribution network dispatcher handles the grounding fault of the 10kV distribution network, it mainly adopts the test pull method, and the reference basis is the line selection result of the line selection device (or line selection function module) in the substation. In the prefecture-level urban distribution network, due to the separation of substation monitoring and dispatching, the main network monitoring personnel will propose line selection suggestions; Obtain grounding information before disposing of it. Due to the limitations...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for line selection based on a ground fault in the distribution automation system in view of the problem that the dispatcher can only take a test route when a ground fault occurs in the distribution network. , the distribution automation master station system can identify the real ground fault, and generate a small current ground fault pulling sequence table for the dispatcher to use