Mining fiber longitudinal override trip protection device and method thereof

Abstract

The invention provides a mining fiber longitudinal override trip protection device and a method thereof, and belongs to an underground power supply system power transmission line protective relaying device and a method thereof. The tip protection device is a fiber longitudinal protection device which is installed in each power substation, and all fiber longitudinal protection devices are connected through a system bus. A CPU mainboard and a signal processing module, a man-machine interface and an optical fiber communication module form bidirectional communication connection. A power supply module connects with the CPU mainboard, the signal processing module, the man-machine interface and the optical fiber communication module. The man-machine interface comprises a liquid crystal display screen, a keyboard and an infrared remote controller. The optical fiber communication module comprises a single-mode fiber interface and a multi-mode fiber interface. The mining fiber longitudinal override trip protection device has the following advantages that: the device has emergency instantaneous quick-break protection, time-limited quick-break protection and over-current protection functions, a common underground override trip problem is solved, and a fault is limited to a minimum range; the device can substitute a traditional simulation protector and a traditional microcomputer protector.

Description

technical field [0001] The invention relates to a relay protection device and method for a power transmission line of an underground power supply system, in particular to a mine-used optical fiber longitudinal leapfrog trip protection device and method. Background technique [0002] The power supply system is the power source of underground production, and the transmission line is an important part of it. The safety of the power supply system is not only related to production, but also related to the safety of underground workers. At present, the underground power supply voltage continues to rise. In some mines, the 6kV high voltage directly supplies power to the fully-mechanized mining face. Due to the poor working conditions and harsh environment of the fully-mechanized mining face, safety problems are becoming more and more prominent. High-voltage cables are easily damaged, and leakage or A short circuit accident, which in turn causes the high-defense switch to leapfrog ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a mining optical fiber longitudinal leapfrog tripping protection device and method to solve the problem of leapfrog tripping existing in the existing underground protection device, to ensure the safety of the normal operation of the power supply system and to quickly remove the fault when it fails

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