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Voltage regulation and control device matched with underground long-distance power supply system of coal mine

A power supply system and voltage regulation technology, applied in circuit devices, AC network voltage adjustment, electrical components, etc., can solve problems such as increasing the cost of coal mining and tunneling operations, increasing the workload of coal mining and tunneling operations, and reducing work efficiency. , to achieve the effect of reducing work efficiency, stabilizing power supply, and improving insulation withstand voltage level

Active Publication Date: 2022-03-01
XINFENGGUANG ELECTRONICS TECH CO LTD
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  • Description
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  • Application Information

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Problems solved by technology

This solution greatly increases the workload of coal mining and tunneling operations in coal mines, reduces work efficiency, and increases the cost of coal mining and tunneling operations

Method used

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  • Voltage regulation and control device matched with underground long-distance power supply system of coal mine
  • Voltage regulation and control device matched with underground long-distance power supply system of coal mine
  • Voltage regulation and control device matched with underground long-distance power supply system of coal mine

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] Such as figure 1 and figure 2 As shown, the system topology diagram and connection schematic diagram of the voltage regulation device of the present invention are provided respectively. The voltage regulation device for supporting the long-distance power supply system under the coal mine shown is a mobile transformer 8 connected in series between the power supply and the load device 7. The voltage regulation control device, when the load motor in the load device 7 starts at power frequency causes the current in the power supply line to be too large and a large voltage drop occurs, the voltage regulation control device can increase the voltage input to the load device 7 to avoid voltage The motor starts under the condition of too low to avoid damage to the motor and other equipment.

[0039] The voltage regulation control device shown is compos...

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Abstract

According to the voltage regulation and control device matched with the underground coal mine long-distance power supply system for use, a voltage regulation and control device is connected in series on a power supply line in front of a mobile transformer and load equipment, and the voltage regulation and control device is composed of a voltage compensation inversion device, an isolation transformation transformer, a voltage sensor V1, a voltage sensor V2 and a current sensor I; the output side of the voltage compensation inversion device is connected to the primary side of the isolation transformation transformer, one end of a secondary side winding of the isolation transformation transformer is connected to the output end of the mobile transformer for power supply, and the other end of the secondary side winding is connected to load equipment; voltage and current signals collected by the voltage sensor before and after the input of the isolation transformation transformer are input into the voltage compensation inversion device. According to the voltage regulation and control device, when it is detected that the voltage input to the load equipment is lower than a set value, the voltage compensation inversion device compensates the voltage input to the load equipment, and long-distance safe and stable power supply to the load equipment under the coal mine is ensured.

Description

technical field [0001] The invention relates to a voltage regulating device, in particular to a supporting voltage regulating device for a long-distance power supply system under a coal mine. Background technique [0002] With the continuous extension of coal mining and tunneling in coal mines, the distance between the power supply transformer and the power load of the subsequent stage is getting farther and farther, and the longest distance reaches 3000-4000 meters. When there is a high-power motor load in the first-level power load, the high-current impact at the moment of starting will cause a large voltage drop on the transmission line, and the voltage drop on the power supply cable will cause the voltage at the end of the power supply to be low. It leads to difficulty in starting or even burning out the motors of coal mining and excavation equipment, misoperation or refusal of relay protection and automatic devices in the power distribution system, damage to microcomput...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/12H02J13/00
CPCH02J3/12H02J13/00004
Inventor 高栋张元吉丁宁任成东朱海梅李成圣孔乐乐周广成
Owner XINFENGGUANG ELECTRONICS TECH CO LTD
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