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Mining high-low voltage integrated mobile transformer switch integrated protection device

A comprehensive protection device and transformer technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of imperfect protection function, easy loss of spare parts market, cumbersome parameter setting, etc., to improve the human-computer interaction friendliness of equipment, The effect of speeding up the protection action time and improving the signal sampling accuracy

Active Publication Date: 2016-12-21
BEIJING HOLLYSYS AUTOMATION & DRIVE
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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.

Method used

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  • Mining high-low voltage integrated mobile transformer switch integrated protection device

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Embodiment 1

[0017] Embodiment 1: see figure 1 , a mining high and low voltage integrated mobile transformer switch comprehensive protection device, including: a data acquisition unit 1, a peripheral expansion unit 2, a digital input and output unit 3, a central processing unit 4, a communication unit 5, a man-machine interface unit 6, keyboard unit 7;

[0018] The data acquisition unit 1 is used for real-time acquisition of AC voltage signals and AC current signals on the input side and output side of the mobile transformer, as well as output side leakage resistance and internal temperature signals of the mobile transformer, and adjusts, filters, and biases the collected signals After processing, the A / D conversion unit sent to the data acquisition unit 1 single-chip microcomputer is converted into a digital signal, and the single-chip computer uses the DFT algorithm to calculate the effective value of the AC signal in real time, and performs protection calculations, and sends the above c...

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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 ...

Claims

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Application Information

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IPC IPC(8): H02H7/04H02H7/22
CPCH02H7/04H02H7/22
Inventor 薛令河侯林锋武丽军张丽娜王建民
Owner BEIJING HOLLYSYS AUTOMATION & DRIVE
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