A mine-used high and low voltage integrated mobile transformer switch comprehensive protection device

Abstract

The invention relates to a mining high-low voltage integrated mobile transformer switch integrated protection device. The device comprises a data acquisition unit (1), a peripheral expansion unit (2), a digital quantity input / output unit (3), a central processing unit (4), a communication unit (5), a man-machine interface unit (6) and a keyboard unit (7). According to the device, through adding sampling channels of AC signals, cooperating with temperature detection and low voltage leakage resistance measurement of a transformer, employing dual-channel current channel design and employing a DFT algorithm, traditional functions are realized, signal sampling precision is improved, the protection motion time is accelerated, short circuit protection lockout for an upper-level power distribution switch is carried out, and problems of large quantity of required integrated protection parts, tedious parameter setting, large communication interface quantity, imperfect protection functions, secondary development incapability and easy loss of a spare part market existing in a traditional mobile transformer switch high-low voltage integrated protection device are effectively solved.

Description

technical field [0001] The invention belongs to the technical field of mine underground power supply safety, and in particular relates to a mine-used high and low voltage integrated mobile transformer switch comprehensive protection device. Background technique [0002] With the continuous development of technology, the low-voltage protection box of the mining explosion-proof mobile substation has gradually replaced the original low-voltage power distribution device, that is, no circuit breaker is installed on the low-voltage side of the mobile substation, and low-voltage faults are protected by disconnecting the high-voltage circuit breaker. Due to structural limitations, the volume of the low-voltage box cannot be reduced. As a result, the current low-voltage protection box only needs to be equipped with a low-voltage comprehensive protection device and related components. The internal space is relatively empty, which wastes materials and space; The gate inrush current is ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a high and low voltage integrated mobile transformer switch comprehensive protection device based on PLC+ARM architecture to solve the problem of the large number of comprehensive protections required by the traditional mobile substation high and low voltage comprehensive protection device, cumbersome parameter setting, and communication interface problems. Problems such as large quantity, imperfect protection function, incapable of secondary development, easy loss of spare parts market, etc.

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