Fault processing method for overhead line type power distribution network

Abstract

The invention discloses a fault processing method for an overhead line type power distribution network. Section switches are installed on a feeder trunk line, intelligent FTUs for monitoring and controlling the section switches are installed at the lower sides of the section switches, and information transmission among the intelligent FTUs installed on the section switches is completed in a GPRS communication mode; after a fault occurs, the first section switch on the feeder trunk line excludes a temporary fault through single shot reclosure; if a permanent fault occurs, before the first section switch recluses, the intelligent FTUs are mutually communicated, the fault is separated according to the logic protection strategy, a distribution network line is reconstructed by connecting the switch actions, load transferring is completed, and the power supply recovery of a non-fault area is achieved. According to the fault processing method, an FA master station is not needed, based on the P2P principle, intelligent FTU terminals are mutually matched in the GPRS communication mode, then the fault can be accurately separated, the power supply of the non-fault area can be recovered, the reliability is high, and the higher flexibility and adaptability are achieved.

Description

technical field [0001] The invention belongs to the coordinated protection technology of distribution network feeders in non-core areas. Background technique [0002] With the development of my country's economy, power users are more and more dependent on electricity consumption, power supply reliability and power supply quality have become the focus of distribution network work, and the main role of distribution network feeder protection has also become to improve power supply reliability and power supply quality. Improve power quality, including feeder fault removal, fault isolation, and power restoration. Current protection is widely used in distribution network feeder protection, and the protection of the whole line is realized by means of time coordination. The premise of current protection to realize distribution network protection is to regard the entire feeder as a unit. When the feeder fails, the entire line is cut off, which lacks selectivity and does not consider...

AI Technical Summary

Problems solved by technology

At present, the mainstream communication method in China is optical fiber communication. However, the feeder protection based on optical fiber communication has a large investment cost and a long construction period, and is not suitable for the distribution network feeder protection in the core areas such as townships and suburbs.

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