An anti-override trip system and protection method for multi-power distribution network

Abstract

The invention relates to an override trip prevention system. The system comprises a microcomputer integration protection apparatus and a communication server. The microcomputer integration protection apparatus and the communication server carry out networking through an optical fiber, a communication cable or a wireless mode and carry out information interaction. The microcomputer integration protection apparatus comprises an outgoing line protection apparatus and a call wire protection apparatus. A protection object of the outgoing line protection apparatus is an outgoing line switch. The outgoing line switch is directly connected to electric equipment. A protection object of the call wire protection apparatus is a call wire switch. The call wire switch is connected to a call wire and a bus or is connected to the bus and a power supply. The protection method of carrying out override trip prevention comprises the following steps of stipulating a blocking signal transmission mode of a protection apparatus; positioning a fault accurately and starting the protection apparatus located between a fault point and a power supply point to realize override trip prevention protection. Therefore, an ''override trip problem'' of a single power supply radiation type distribution network can be solved and an ''override trip problem'' of a multi-power-supply distribution network can be solved too.

Description

technical field [0001] The invention relates to an anti-overstepping tripping system, in particular to an anti-overstepping tripping system suitable for multi-power distribution networks and a method for using the system for anti-overstepping tripping protection, belonging to the technical field of power supply and distribution in coal mines. Background technique [0002] At present, in my country's power grid power supply system, such as industrial and mining enterprises, coal enterprises, urban communities, intelligent buildings, etc., there are generally multi-stage series connection power supply modes, which are characterized by short power supply lines, many extension stages, and short-circuit currents of different levels are very close to each other. , the current setting values ​​of different levels of protection cannot be matched. In industrial and mining enterprises, there are often multiple power points in the power distribution network, which puts forward higher re...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the technical problems existing in the prior art, and provides an anti-overstepping tripping system and its anti-overlapping tripping protection method suitable for multi-power distribution networks. The system can not only solve the " Overstep trip problem", and can solve the "overstep trip problem" of multi-power distribution network, the anti-overstep trip protection method adopted is time-sensitive and easy to operate

Images