Power distribution device, protective system, mining power monitoring system and protection method

Abstract

The invention discloses a power distribution device. When a short-circuit fault occurs in a line, protectors in the power distribution device on the upper side and the lower side of a fault point find that difference current is out of limit through mutual information send a short-circuit fault tripping signal and control tripping of a switch in the power distribution device to cut off the fault line. The protectors in the power distribution device with high matched gene mapping ID priority in line send fault information to the background. The decision-making right is issued to each power distribution device to enable the protection reliability to be improved greatly, only one or more power distribution devices with high matched gene mapping ID priority occupy the network at the fault occurrence moment according to the gene mapping ID priority level, communication data are greatly decreased, the communication fault possibility is reduced, the problem that communication faults in the prior art enable front-stage and back-stage locking not to be protected is solved, and override tripping of the power distribution device is fundamentally and completely eradicated by using the gene mapping ID priority level as a protection action sequence.

Description

technical field [0001] The invention relates to the technical field of coal mine power supply, in particular to a power distribution device, a protection system, a mine power monitoring system and a protection method. Background technique [0002] In the coal mine power supply system, from the ground substation to the underground central substation, and between substations in the mining area of ​​each working face, vertical, multi-level, and short-distance vertical power supply modes are mostly used. However, the line distance of this power supply mode is short and the cross-sectional area is large, so that the impedance of each section of the cable is small, the short-circuit current is large, and the short-circuit current at the first and last ends of each level of power supply network is not much different; moreover, the power supply conditions of coal mines are harsh and the environment is humid , There is a lot of interference, and often a short-circuit fault occurs in ...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a power distribution device, a protection system, a mining power monitoring system and a protection method to solve the problem in the prior art that the front and rear stages lose protection due to communication failures when solving the leapfrog tripping problem

Images