Mine intelligent power supply override trip prevention system and method

Abstract

The invention provides a mine intelligent power supply override trip prevention system which comprises a ground substation, an underground central substation, an underground mobile substation and an underground explosive-proof switch, the underground central substation is connected with the underground mobile substation; the underground central substation is connected with the ground substation; underground explosion-proof switches are arranged between the underground central substation and the underground mobile substation as well as between the underground central substation and the ground substation to form a five-stage power station system; each transformer substation of each stage is provided with transformer substation protection automation equipment. The transformer substation protection automation equipment comprises a protector, and the protector is connected with a circuit breaker in a transformer substation and is connected with an upper-level protector through the Ethernet.System fault comprehensive analysis and accurate fault isolation are achieved through the protection controller and the communication network, and the override trip problem of an existing system is solved.

Description

technical field [0001] The invention belongs to the technical field of mine safety power supply, and in particular relates to a mine intelligent power supply anti-override tripping system and method. Background technique [0002] With the rapid improvement of the mechanization and automation level of coal mining, lifting and washing equipment, the quantity and power of ground and underground electrical equipment are also greatly increasing; the complex power supply network makes the setting more difficult, and the large-capacity instantaneous impact load Factors such as voltage fluctuations and phase-to-phase voltage imbalances, the Nth harmonic energy generated by large-capacity frequency conversion equipment on the quality of power supply and the rapid aging of power supply lines, and the specific production environment of coal mines are constantly impacting on "coal mine power supply." Reliability" is a fragile topic. How to properly solve large-scale power outage accide...

AI Technical Summary

Problems solved by technology

[0005] 1. The underground part rarely realizes remote monitoring and control, and cannot realize automatic and integrated management with the substation on the well

[0006] 2. Due to the fact that some underground lines are short and have many levels, and power companies have high requirements for protection delays, the protection setting cannot accurately remove faults and fail to meet the selective requirements.

[0007] 3. Accurate grounding line selection cannot be realized. Although the grounding line selection device is equipped in the substation, the line selection is often inaccurate, and the grounding section cannot be located, which affects the power supply of the entire line.

[0008] 4. Electricity metering management and statistics are relatively cumbersome. Due to the lack of automation in the underground department, manual timing meter reading is mainly used, resulting in a lot of waste of manpower

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