Failure automatic diagnosis and separation apparatus and method for power distribution network overhead line

Abstract

The present invention discloses a apparatus and method for automatic isolation of fault section of short circuit fault of power distribution network overhead network and single-phase earth fault, and power supply automatic recovery of non-fault section, which is suitable for power distribution network electric network overhead network of 3-10kV. The principle of automatic isolation and power supply automatic recovery is as following: mount a plurality of voltage type recloser on the overhead network to separate the network into a plurality of sections; when fault occurs, a relay protection device or a line selection device transmits signal to automatically break off or close a faulty line outlet breaker according to preset delay time and action sequence, and then coordinate with the network recloser; determine fault section through one time reclosing; isolate fault section through secondary reclosing and then recover power supply in non-fault section. At the same time, a detection terminal installation mounted on a substation can automatically judge section where the fault in, and transmit the fault message to a scheduling background while transmitting to designated customers in short message way. The present invention is provided with mature technology and high reliability.

Description

Device and method for automatic diagnosis and isolation of overhead line faults in distribution network technical field The invention belongs to the technical field of electric power system, and specifically relates to a method applicable to overhead lines of 6-10kV distribution network, capable of quickly automatically isolating faulty sections and automatically restoring power supply to non-faulty sections for short-circuit faults and single-phase grounding faults and device. Background technique The 6-10kV distribution network in my country is characterized by numerous branches and scattered loads. When a short-circuit fault or ground fault occurs on the line, the traditional measure is to disconnect the line from the beginning of the line, and then perform troubleshooting, or manually isolate the faulty section . This has led to a power outage for a long period of time for all loads on the line, which has greatly affected the reliability of power supply and economic be...

AI Technical Summary

Problems solved by technology

This leads to a power outage for a long period of time for all loads on the line, which greatly affects the reliability of power supply and economic benefits.

At the same time, due to the wide distribution of lines, the problem of fault location also plagued the operation department

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