Large-load automatic voltage stabilizing and regulating system for remote power supply of fully mechanized coal mining face

Abstract

The utility model provides a fully mechanized coal mining face long-distance power supply large-load automatic voltage stabilizing and regulating system, and relates to the technical field of coal mining. The system comprises a mobile substation (1), a combination switch (2), a power supply cable (3), an on-load voltage regulation device (4) and a load (5), and the on-load voltage regulation device (4) is used for automatically compensating voltage fluctuation of the fully mechanized coal mining face under large-load starting and operation so as to provide voltage required by large-load starting and operation. Therefore, voltage stabilization and voltage regulation of the power system can be realized based on the on-load voltage regulation equipment, so that normal operation of the load is ensured, and the reliability of the power system of the fully mechanized coal mining face is improved.

Description

Technical Field

[0001] The present application relates to the technical field of coal mining, and in particular to a large-load automatic voltage stabilization and regulation system for long-distance power supply to a fully mechanized mining face. Background Art

[0002] Modern mines usually use large-load equipment for mechanized operations. Their installed capacity is large and the power supply distance is correspondingly longer. Only by ensuring the power supply quality of the fully mechanized mining face can the normal operation of the fully mechanized mining face be guaranteed.

[0003] In the related technology, the voltage stability of the power system cannot be guaranteed, which affects the normal operation of the load and the safety of the system. Utility Model Content

[0004] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0005] The embodiment of the present application proposes a system for automatic voltage stabilization and regulation of a large load for long-distance power supply to a fully mechanized mining face, comprising:

[0006] A mobile substation (1), a combination switch (2), a power supply cable (3), an on-load voltage regulating device (4) and a load (5), wherein:

[0007] The on-load voltage regulating device (4) is used to automatically compensate for voltage fluctuations during heavy-load startup and operation of the fully mechanized mining face, so as to provide the voltage required for heavy-load startup and operation.

[0008] Optionally, in some embodiments,

[0009] The mobile substation (1) is a KGSGZY mining flameproof mobile substation, which is composed of a dry-type transformer, a permanent magnet high-voltage vacuum switch and a low-voltage protection box.

[0010] Optionally, in some embodiments,

[0011] The combination switch (2) is a QJZ mining explosion-proof and intrinsically safe low-voltage vacuum electromagnetic starter.

[0012] Optionally, in some embodiments,

[0013] The power supply cable (3) is a MCPTJ coal mining machine metal shielded rubber sheathed flexible cable.

[0014] Optionally, in some embodiments,

[0015] The on-load voltage regulating equipment (4) is a KJSG mining explosion-proof and intrinsically safe on-load voltage regulating dry-type transformer.

[0016] Optionally, in some embodiments,

[0017] The load (5) is an MG AC traction coal mining machine or an SGZ scraper conveyor.

[0018] Optionally, in some embodiments, the mining explosion-proof and intrinsically safe on-load voltage-regulating dry-type transformer includes: a multi-tap three-phase dry-type transformer, a voltage stabilizing and regulating control center, and an arc-free on-load tap changer.

[0019] Optionally, in some embodiments, the multi-tap three-phase dry-type transformer is a 9-tap three-phase dry-type transformer, corresponding to 95%, 97.5%, 100%, 102.5%, 105%, 107.5%, 110%, 115%, 120% of its primary side voltage, 9 taps per phase, a total of 27 taps, and the voltage regulation ratio is P out / in .

[0020] Optionally, in some embodiments, the voltage stabilization and voltage regulation control center includes a three-phase current transformer, a three-phase voltage transformer and a digital signal processing chip; wherein,

[0021] The three-phase current transformer is used to collect three-phase current data and transmit it to the digital signal processing chip;

[0022] The three-phase voltage transformer is used to collect three-phase voltage data and transmit it to the digital signal processing chip.

[0023] The long-distance power supply and large-load automatic voltage stabilization and regulation system for the fully mechanized mining working face provided in this application has the following characteristics:

[0024] Beneficial effects:

[0025] In this embodiment, the voltage stabilization and voltage regulation of the power system can be achieved based on the on-load voltage regulating equipment to ensure the normal operation of the load and improve the system reliability of the power supply of the comprehensive mining working face.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 It is a structural schematic diagram of a large-load automatic voltage stabilization and regulation system for long-distance power supply to a comprehensive mining working face according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] The specific embodiments of the present application are described in detail below with reference to the accompanying drawings, but are not intended to be limiting of the present application.

[0030] It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but only as an example of an embodiment. Other modifications within the scope and spirit of the present application will occur to those skilled in the art.

[0031] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0032] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0033] It should also be understood that, although the present application has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the present application that have the features of the claims and are therefore within the scope of protection defined thereby.

[0034] The above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

[0035] Specific embodiments of the present application are described hereinafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present application, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that obscure the present application. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any suitable detailed structure.

[0036] This specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present application.

[0037] The following describes the automatic voltage stabilization and regulation system for long-distance power supply and large load of the comprehensive mining working face according to the embodiment of the present application with reference to the accompanying drawings.

[0038] Figure 1 It is a structural schematic diagram of a large-load automatic voltage stabilization and regulation system for long-distance power supply to a comprehensive mining working face according to an embodiment of the present application.

[0039] like Figure 1 As shown, the long-distance power supply and large-load automatic voltage stabilization and voltage regulation system for a fully mechanized mining face comprises: a mobile substation (1), a combination switch (2), a power supply cable (3), an on-load voltage regulation device (4) and a load (5), wherein:

[0040] The on-load voltage regulating device (4) is used to automatically compensate for voltage fluctuations during heavy-load startup and operation of the fully mechanized mining face, so as to provide the voltage required for heavy-load startup and operation.

[0041] Among them, a mobile substation is a movable power equipment, usually composed of a transformer, a switchgear, a protection device, a control device, a cooling device, etc. The mobile substation can be quickly deployed and disassembled to provide a quick response when temporary or emergency power supply is required. The model of the mobile substation (1) is not limited in the embodiments of the present disclosure.

[0042] Among them, the combination switch is an electrical device that integrates multiple functions, usually including circuit breakers, isolating switches, grounding switches, load switches and other functions in one device. It can simultaneously complete different electrical operations, such as switching, isolating, short-circuit protection, etc., and has the characteristics of compact structure, diverse functions, and easy operation. In the embodiment of the present disclosure, the combination switch is used to control and protect circuits to ensure the safe operation of the power system. By combining switches and circuit breakers with different functions, the combination switch can achieve flexible electrical control to meet the needs of different circuits. There is no restriction on the model of the combination switch (2) in the embodiment of the present disclosure.

[0043] In the disclosed embodiment, the combination switch (2) is located between the mobile substation (1) and the on-load voltage regulating device (4) and is used to control the electrical connection between the two.

[0044] The power supply cable is a cable used to transmit electric energy, which is usually composed of a conductor, an insulating layer, a sheath and other accessories. In the embodiment of the present disclosure, there is no restriction on the model of the power supply cable (3).

[0045] Among them, the on-load voltage regulator is a voltage regulating device used in the power system, which is usually used to stabilize the system voltage and ensure that the load equipment obtains the required stable voltage. The on-load voltage regulator can automatically adjust the output voltage according to the changes in the system load to meet the voltage requirements under different load conditions. The model of the on-load voltage regulator (4) is not limited in the embodiment of the present disclosure.

[0046] In the disclosed embodiment, the corresponding voltage regulation control logic can be pre-configured in the on-load voltage regulation device (4), so as to automatically compensate for the voltage fluctuations under the heavy load startup and operation of the comprehensive mining face, so as to provide the voltage required for heavy load startup and operation.

[0047] The load refers to the equipment or system in the fully mechanized mining face that needs to consume electric energy to work. The type and quantity of the load are not limited in the embodiments of the present disclosure.

[0048] In this embodiment, the voltage stabilization and voltage regulation of the power system can be achieved based on the on-load voltage regulating equipment to ensure the normal operation of the load and improve the system reliability of the power supply of the comprehensive mining working face.

[0049] Optionally, in some embodiments,

[0050] The mobile substation (1) is a KGSGZY mining flameproof mobile substation, which is composed of a dry-type transformer, a permanent magnet high-voltage vacuum switch and a low-voltage protection box.

[0051] That is to say, the mobile substation (1) in the embodiment of the present disclosure can adopt the KGSGZY mining flameproof mobile substation, which has the characteristics of explosion-proof, fire-proof and dust-proof, and is also easy to carry and move, with multiple protections, providing safe and reliable power support for coal mine production.

[0052] Optionally, in some embodiments,

[0053] The combination switch (2) is a QJZ mining explosion-proof and intrinsically safe low-voltage vacuum electromagnetic starter.

[0054] That is to say, in the disclosed embodiment, the combination switch (2) can adopt the QJZ mining explosion-proof and intrinsically safe low-pressure vacuum electromagnetic starter, so that it has the characteristics of explosion-proof, intrinsically safe, low-pressure vacuum technology, etc., providing safe and reliable electrical control support for coal mine production.

[0055] Optionally, in some embodiments,

[0056] The power supply cable (3) is a MCPTJ coal mining machine metal shielded rubber sheathed flexible cable.

[0057] That is to say, in the disclosed embodiment, the power supply cable (3) can adopt the MCPTJ coal mining machine metal shielded rubber sheathed soft cable, which has the characteristics of metal shielding, rubber sheath protection, flexibility and wear resistance, and can meet the requirements for power transmission cables in the complex environment of coal mines.

[0058] Optionally, in some embodiments,

[0059] The on-load voltage regulating equipment (4) is a KJSG mining explosion-proof and intrinsically safe on-load voltage regulating dry-type transformer.

[0060] That is to say, in the disclosed embodiment, the on-load voltage regulating equipment (4) can adopt KJSG mining explosion-proof and intrinsically safe on-load voltage regulating dry-type transformer, so that it has the characteristics of explosion-proof, intrinsically safe, on-load voltage regulating, dry-type transformer, etc., providing safe and reliable power supply and voltage regulation support for coal mine production.

[0061] Optionally, in some embodiments,

[0062] The load (5) is an MG AC traction coal mining machine or an SGZ scraper conveyor.

[0063] Optionally, in some embodiments, the mine-use explosion-proof and intrinsically safe on-load voltage-regulating dry-type transformer includes: a multi-tap three-phase dry-type transformer, a voltage stabilizing and regulating control center, and an arc-free on-load tap changer.

[0064] Among them, the multi-tap three-phase dry-type transformer has multiple output terminals (taps) that can be selected to achieve different output voltages. In the embodiment of the present disclosure, by selecting different output terminals, multiple output voltages can be achieved, which is suitable for various occasions requiring multi-level voltage output and has high reliability and applicability.

[0065] The voltage stabilization and voltage regulation control center refers to the control center used for voltage stabilization and voltage regulation control in the explosion-proof and intrinsically safe on-load voltage regulation dry-type transformer for mining. The voltage stabilization and voltage regulation control center can be pre-configured with the corresponding voltage stabilization and voltage regulation control logic to facilitate voltage stabilization and voltage regulation control according to the application scenario during the working process.

[0066] Among them, the arc-free on-load tap changer is an electrical device used in the power distribution system. Its main function is to perform voltage regulation operations on the tap transformer under the rated current state without generating arcs and affecting normal operation. By adopting the arc-free on-load tap changer in the embodiment of the present disclosure, it can have the characteristics of arc-free design, on-load tapping, high reliability, remote control and strong safety, and can realize accurate control of the transformer voltage and ensure the stable operation of the power distribution system.

[0067] Optionally, in some embodiments, the multi-tap three-phase dry-type transformer is a 9-tap three-phase dry-type transformer, corresponding to 95%, 97.5%, 100%, 102.5%, 105%, 107.5%, 110%, 115%, 120% of its primary side voltage, 9 taps per phase, a total of 27 taps, and the voltage regulation ratio is P out / in .

[0068] It can be understood that in the embodiments of the present disclosure, the number of taps of the multi-tap three-phase dry-type transformer and the voltage regulation ratio corresponding to each tap can be flexibly configured according to the application scenario, and there is no limitation on this.

[0069] Optionally, in some embodiments, the voltage stabilization and voltage regulation control center includes a three-phase current transformer, a three-phase voltage transformer and a digital signal processing chip; wherein,

[0070] The three-phase current transformer is used to collect three-phase current data and transmit it to the digital signal processing chip;

[0071] The three-phase voltage transformer is used to collect three-phase voltage data and transmit it to the digital signal processing chip.

[0072] That is to say, in the embodiment of the present disclosure, the voltage stabilization and voltage regulation control center includes a three-phase current transformer, a three-phase voltage transformer and a digital signal processing chip; wherein the three-phase current transformer is used to collect three-phase current data and transmit it to the digital signal processing chip; the three-phase voltage transformer is used to collect three-phase voltage data and transmit it to the digital signal processing chip. Therefore, the real-time collection of three-phase current data and three-phase voltage data can be realized based on the three-phase current transformer and the three-phase voltage transformer, thereby providing reliable data support for the digital signal processing chip to perform voltage stabilization and voltage regulation control.

[0073] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A long-distance power supply and large-load automatic voltage stabilization and regulation system for a fully mechanized mining face, characterized in that: include: A mobile substation (1), a combination switch (2), a power supply cable (3), an on-load voltage regulating device (4) and a load (5), wherein: The on-load voltage regulating device (4) is used to automatically compensate for voltage fluctuations during heavy-load startup and operation of the fully mechanized mining face, so as to provide the voltage required for heavy-load startup and operation.

2. The system according to claim 1, characterized in that in, The mobile substation (1) is a KGSGZY mining flameproof mobile substation, which is composed of a dry-type transformer, a permanent magnet high-voltage vacuum switch and a low-voltage protection box.

3. The system according to claim 1, characterized in that in, The combination switch (2) is a QJZ mining explosion-proof and intrinsically safe low-voltage vacuum electromagnetic starter.

4. The system according to claim 1, characterized in that in, The power supply cable (3) is a MCPTJ coal mining machine metal shielded rubber sheathed flexible cable.

5. The system according to claim 1, wherein: in, The on-load voltage regulating equipment (4) is a KJSG mining explosion-proof and intrinsically safe on-load voltage regulating dry-type transformer.

6. The system according to claim 1, wherein: in The load (5) is an MG AC traction coal mining machine or an SGZ scraper conveyor.

7. The system according to claim 5, characterized in that The mine-used explosion-proof and intrinsically safe on-load voltage-regulating dry-type transformer comprises: a multi-tap three-phase dry-type transformer, a voltage-stabilizing and voltage-regulating control center and an arc-free on-load tap-changer.

8. The system according to claim 7, characterized in that The multi-tap three-phase dry-type transformer is a 9-tap three-phase dry-type transformer, which corresponds to 95%, 97.5%, 100%, 102.5%, 105%, 107.5%, 110%, 115%, 120% of its primary side voltage respectively, 9 taps per phase, a total of 27 taps, and the voltage regulation ratio is P out / in .

9. The system according to claim 7, characterized in that The voltage stabilization and regulation control center includes a three-phase current transformer, a three-phase voltage transformer and a digital signal processing chip; wherein, The three-phase current transformer is used to collect three-phase current data and transmit it to the digital signal processing chip; The three-phase voltage transformer is used to collect three-phase voltage data and transmit it to the digital signal processing chip.

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