Underground anti-override tripping system based on radio frequency network

Abstract

The invention discloses an underground anti-override tripping system based on a radio frequency network. The underground anti-override tripping system comprises a microcomputer integrated protection device and a communication server, wherein the microcomputer integrated protection device and the communication server are networked in a radio frequency and optical fiber combination mode. System parameters of the underground anti-override tripping system based on the radio frequency network are automatically generated and downloaded through the Ethernet. The technical problem of override tripping caused by difficulty in matching of superior and subordinate relay protection current constant values of an underground distribution system is solved. The underground anti-override tripping system based on the radio frequency network has the advantages that: by automatically configuring the system parameters and setting a locking relationship of the microcomputer integrated protection device, the overload override tripping of the underground distribution system is effectively prevented, the safety and stability of operation of an underground system are guaranteed, the difficulty of underground construction is reduced, and the safety of underground constructors is guaranteed.

Description

[0001] technical field [0002] 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 [0003] 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...

AI Technical Summary

Problems solved by technology

[0006] 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.

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