Underground anti-override tripping system based on radio frequency network

Abstract

The invention discloses a downhole anti-overstepping system based on a wireless radio frequency network, which includes a microcomputer integrated protection device and a communication server. The system parameters of the downhole anti-leapfrogging system are automatically generated, and the system parameters are downloaded through Ethernet. The technical problem solved by the invention lies in the problem of overstepping and tripping caused by difficult coordination of the upper and lower relay protection current setting values ​​of the underground power distribution system. Through the underground anti-overstepping system based on the wireless radio frequency network disclosed by the present invention, through the automatic configuration of system parameters and the locking relationship set by the microcomputer integrated protection device, the overload tripping of the underground power distribution system is effectively prevented, and the downhole system is guaranteed. Safety and stability reduce the difficulty of underground construction and ensure the safety of underground construction personnel.

Description

technical field [0001] The invention relates to a coal mine underground circuit safety system, in particular to an underground anti-skimming system based on a wireless radio frequency network. Background technique [0002] In the coal mine underground power supply system, since the distances of all levels of the power supply system are relatively short, when a fault occurs at the end, the fault current amplitude of each segment has a small difference. When a short circuit fault occurs, there is a large difference. It may happen that the short-circuit current exceeds the instantaneous setting value of the two-level or even three-level circuit breaker above the fault point, so that the quick-break protection enters the instantaneous state at the same time, and non-selective leapfrog tripping may occur. It may even cause the 6KV or 10KV downhole cable switch on the ground to trip, which may cause a large-scale underground power outage. In severe cases, it may cause a rapid ...

AI Technical Summary

Problems solved by technology

[0005] The anti-overstepping trip system has a large number of blocking stages, and the blocking relationship is complicated. The field parameters often require engineers to go down the well to adjust the device.

However, the technical level of the engineering personnel is uneven, and even sometimes they are careless, which will lead to wrong parameters, which will affect the locking relationship of the entire anti-override tripping system.

Images