Movable pressure regulating device

Abstract

The invention provides a mobile voltage regulating device which comprises a box body, a voltage regulating assembly, a first switch assembly, a second switch assembly, a control assembly and a wiring terminal row, the wiring terminal row is arranged on the outer side of the box body, and the first switch assembly and the second switch assembly are electrically connected with the wiring terminal row respectively. The other end of the first switch assembly and the other end of the second switch assembly are electrically connected with the voltage regulating assembly, and the voltage regulating assembly is connected between the first switch assembly and the second switch assembly in series. The controlled end of the first switch assembly, the controlled end of the second switch assembly and the controlled end of the voltage regulating assembly are connected with the output end of the control assembly. By means of the mobile voltage regulating device, power supply voltage regulation or intervention can be carried out on lines with temporary voltage regulating requirements, and meanwhile the purpose of reducing the maintenance cost can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution, and in particular to a mobile voltage regulating device. Background Art

[0002] In a power system, voltage adjustment is carried out through an on-load voltage regulating device, which can not only stabilize the voltage of the power grid but also improve the reliability and economy of power supply. For short lines, it is generally possible to meet the load operation requirements without setting a voltage regulating device. However, for long lines, a voltage regulating device needs to be set to adjust or intervene in the power supply quality. Most of the voltage regulating devices set for long lines are fixed devices and cannot be moved.

[0003] However, during the actual operation of the power grid, when a power supply fault occurs in a certain short line and power supply needs to be provided through another short line or long line, the two lines need to be connected through a tie switch; due to the increase in the line length, the voltage of the end load cannot meet the operation requirements, and voltage regulation is required for the line after the connection. At this time, a voltage regulating device needs to be set at the connection point. This voltage regulating device belongs to a temporary voltage regulating device and needs to be removed if the power supply of the faulty line is restored. Therefore, a mobile voltage regulating device is more flexible. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a mobile voltage regulating device to realize the regulation or intervention of the supply voltage of a line with temporary voltage regulation requirements, and at the same time, it can also reduce the maintenance cost.

[0005] To this end, in one embodiment, a mobile voltage regulating device is provided, which includes a box body, a voltage regulating component, a first switch component, a second switch component, a control component and a terminal block. The terminal block is arranged outside the box body. The first switch component and the second switch component are respectively electrically connected to the terminal block. The other ends of the first switch component and the switch component are respectively electrically connected to the voltage regulating component. The voltage regulating component is connected in series between the first switch component and the second switch component. The controlled ends of the first switch component, the second switch component and the voltage regulating component are respectively connected to the output end of the control component.

[0006] As a further optional solution of the mobile voltage regulating device, the first switch component includes a first high-voltage circuit breaker and a first voltage transformer. The second switch component includes a second high-voltage circuit breaker and a second voltage transformer. The output end of the voltage regulating component is connected in series to the first voltage transformer. The output ends of the first voltage transformer, the second voltage transformer and the first current transformer are connected to the signal input end of the control component. The signal output end of the control component is connected to the controlled ends of the first high-voltage circuit breaker, the second high-voltage circuit breaker and the voltage regulating component.

[0007] As a further optional solution of the mobile voltage regulating device, both the first switch assembly and the second switch assembly include lightning arresters.

[0008] As a further optional solution of the mobile voltage regulating device, the control assembly further includes a high-voltage reactive power compensator.

[0009] As a further optional solution of the mobile voltage regulating device, the box body is partitioned into a plurality of cavities so that the voltage regulating assembly, the first switch assembly, the second switch assembly and the control assembly are isolated.

[0010] As a further optional solution of the mobile voltage regulating device, the box body further includes a first door, and the opening and closing of the first door can connect or isolate the first switch assembly, the second switch assembly, the control assembly and the outside.

[0011] As a further optional solution of the mobile voltage regulating device, the box body further includes a second door, and the opening and closing of the second door can connect or isolate the voltage regulating assembly and the outside.

[0012] As a further optional solution of the mobile voltage regulating device, a plurality of lifting devices are further provided on the bottom surface of the box body, and the lifting devices can be lifted to adjust the horizontal angle of the box body.

[0013] As a further optional solution of the mobile voltage regulating device, a spirit level is further included, and the spirit level is arranged on the box body.

[0014] As a further optional solution of the mobile voltage regulating device, the box body further includes a rain shield, and the rain shield is arranged above the terminal block.

[0015] Implementing the embodiments of the present invention will have the following beneficial effects:

[0016] According to the mobile voltage regulating device in the above embodiments, when it is found that the existing line needs voltage regulation intervention for power supply, the mobile voltage regulating device is transported to the destination. Connect the power transmission line to the terminal block, and then disconnect the original circuit of the power transmission line. The first switch assembly and the second switch assembly start to close, so that the power transmission line passes through the mobile voltage regulating device. Since the voltage regulating assembly is connected in series between the first switch assembly and the second switch assembly, the current passes through the voltage regulating assembly after passing through the first switch assembly, and the voltage flowing out from the second switch assembly changes. The control assembly generally controls the opening and closing of the first switch assembly and the second switch assembly and the power of the voltage regulating assembly. Implementing the mobile voltage regulating device in the present invention can realize the regulation or intervention of the power supply voltage of the line with temporary voltage regulation requirements, and at the same time can reduce the maintenance cost. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Among them:

[0019] Figure 1 shows a schematic diagram of the principle structure of a mobile voltage regulating device provided according to an embodiment of the present invention;

[0020] Figure 2 shows a schematic diagram of the structure of a mobile voltage regulating device provided according to an embodiment of the present invention.

[0021] Main element symbol description:

[0022] Mobile voltage regulating device - 100; First switch assembly - 10; First high-voltage circuit breaker - QF1; First voltage transformer - PT1; Second switch assembly - 20; Second high-voltage circuit breaker - QF2; Second voltage transformer - PT2; Voltage regulating assembly - 30; Control assembly - 40; Controller - 410; High-voltage reactive power compensator - 420; First lightning arrester - FV1; Second lightning arrester - FV2. Specific embodiments

[0023] To facilitate the understanding of the present invention, the following will describe the present invention more comprehensively with reference to the relevant drawings. The drawings show preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0026] In an embodiment of the present invention, a mobile voltage regulating device 100 is provided. Please refer to Figure 1 and Figure 2 . The mobile voltage regulating device 100 includes a box body (not shown in the figure), a voltage regulating component 30, a first switch component 10, a second switch component 20, a control component 40, and a terminal block (not shown in the figure). The terminal block is arranged outside the box body. The first switch component 10 and the second switch component 20 are respectively electrically connected to the terminal block. The other ends of the first switch component 10 and the second switch component 20 are respectively electrically connected to the voltage regulating component 30. The voltage regulating component 30 is connected in series between the first switch component 10 and the second switch component 20. The controlled ends of the first switch component 10, the second switch component 20, and the voltage regulating component 30 are respectively connected to the output end of the control component 40.

[0027] According to the mobile voltage regulating device in the above embodiment, when it is found that the existing line requires adjustment and intervention of the power supply voltage, the mobile voltage regulating device is transported to the destination. Connect the power transmission line to the terminal block, and then disconnect the original circuit of the power transmission line. The first switch component 10 and the second switch component 20 start to close, so that the power transmission line passes through the mobile voltage regulating device. Since the voltage regulating component 30 is connected in series between the first switch component 10 and the second switch component 20, the current passes through the voltage regulating component 30 after flowing through the first switch component 10, and the voltage flowing out from the second switch component 20 changes. The control component 40 generally controls the opening and closing of the first switch component 10 and the second switch component 20 and the power of the voltage regulating component 30. Implementing the mobile voltage regulating device in the present invention can realize the adjustment or intervention of the power supply voltage of the line with temporary voltage regulation requirements, and at the same time can achieve the purpose of reducing the maintenance cost.

[0028] On both sides of the voltage regulating component 30, a plurality of heat sinks are arranged side by side through upper and lower brackets. The voltage regulating component 30 adopts a star-connected 10kV / 5000kVA oil-immersed autotransformer, and the tap-changer is a 9-stage vacuum on-load tap-changer, and the voltage regulation range is ±4×5% (i.e., ±20%). The voltage regulating component 30 adjusts the line voltage under the instruction of the control component 40 to meet the load stable operation requirements.

[0029] The outer end of the terminal block is connected to the line to be adjusted through a silica gel cable or a flexible cable.

[0030] In some specific embodiments, the first switch assembly 10 includes a first high-voltage circuit breaker QF1 and a first voltage transformer PT1, the second switch assembly 20 includes a second high-voltage circuit breaker QF2 and a second voltage transformer PT2, and the output end of the voltage regulating assembly 30 is connected in series with a first current transformer CT1; the output ends of the first voltage transformer PT1, the second voltage transformer PT2, and the first current transformer CT1 are connected to the signal input end of the control assembly 40; the signal output end of the control assembly 40 is connected to the controlled ends of the first high-voltage circuit breaker QF1, the second high-voltage circuit breaker QF2, and the voltage regulating assembly 30.

[0031] In this embodiment, the first voltage transformer PT1 and the second voltage transformer PT2 are adjusted to achieve voltage regulation.

[0032] The control assembly 40 generally includes a controller 410 and a high-voltage reactive power compensator 420. The output ends of the first voltage transformer PT1, the second voltage transformer PT2, and the current transformer CT1 are connected to the signal input end of the controller 410; the signal output end of the controller 410 is connected to the controlled ends of the first high-voltage circuit breaker QF1, the second high-voltage circuit breaker QF2, the voltage regulator, and the high-voltage reactive power compensator 420.

[0033] The high-voltage reactive power compensator 420 is used to perform reactive power compensation on the line under the instruction of the controller 410. In this implementation, the high-voltage reactive power compensator 420 adopts a 10kV / 250kvar×2 dynamic compensator.

[0034] The control assembly 40 has voltage regulation control and reactive power control functions, and can issue control instructions to the voltage regulating assembly 30 and the high-voltage reactive power compensator 420 under the collected current and voltage conditions to adjust the line voltage and reactive power.

[0035] In some specific embodiments, both the first switch assembly 10 and the second switch assembly 20 include lightning arresters.

[0036] In this embodiment, to improve the lightning protection effect, a first lightning arrester FV1 is also provided at the first high-voltage circuit breaker, and a second lightning arrester FV2 is provided at the second high-voltage circuit breaker. The first lightning arrester FV1 is connected between the connection line between the first high-voltage circuit breaker and the voltage regulator and the ground, and the second lightning arrester FV2 is connected between the connection line between the second high-voltage circuit breaker QF2 and the voltage regulating assembly 30 and the ground.

[0037] To improve the heat dissipation effect, the present invention respectively opens a number of ventilation holes on the side walls of the box corresponding to both sides of the voltage regulating assembly 30 to form convection to improve the internal heat dissipation capacity, and an intake fan is respectively installed at the upper and lower ends of one side wall, and an exhaust fan is respectively installed at the upper and lower ends of the other side wall.

[0038] In some specific embodiments, the control component 40 further includes a high-voltage reactive power compensator 420.

[0039] In direct current, the power consumed by a load is proportional to the product of the current flowing through the load and the voltage across the load. The energy generated by the power source is transmitted in a fixed direction, i.e., from the power source end to the load end. However, in an AC power system, both the voltage and current continuously alternate in the form of sine waves. Therefore, in this case, if the phases of the voltage and current do not exactly match, a series of complex problems will occur. In basic circuit theory, power is defined as two parts. One part is the power provided by the power source to the load, i.e., active power, which is used to do work at the load end, such as converting into heat effects, dynamic effects, etc. The other part is called reactive power. The generation of reactive power is due to the phase difference between the voltage and current, so it cannot produce corresponding effects at the load end.

[0040] The high-voltage reactive power compensator 420 is a device that reduces the flow of reactive power in the power grid by compensating for reactive power.

[0041] In some specific embodiments, the box body is divided into multiple cavities to isolate and arrange the voltage regulating component 30, the first switch component 10, the second switch component 20, and the control component 40.

[0042] The mobile voltage regulating device 100 usually operates while being energized. Dividing the box body into multiple cavities can, on the one hand, isolate each device from each other to avoid electromagnetic interference. On the other hand, it can prevent operators from accidentally touching other energized devices when operating the control component 40, resulting in electric shock.

[0043] In some specific embodiments, the box body further includes a first door. The opening and closing of the first door can connect or isolate the first switch component 10, the second switch component 20, and the control component 40 from the outside.

[0044] The first door mainly encloses the first switch component 10, the second switch component 20, and the control component 40 to prevent some animals, children, etc. from accidentally touching the first switch component 10, the second switch component 20, and the control component 40 during operation.

[0045] In some specific embodiments, the box body further includes a second door. The opening and closing of the second door can connect or isolate the voltage regulating component 30 from the outside.

[0046] Correspondingly, the second door is to prevent accidental contact with the voltage regulating component 30. The reason for isolating the voltage regulating component 30 from other components is that the voltage regulating component 30 is more dangerous, and it is to prevent electrician operators from accidentally touching the voltage regulating component 30 during operation.

[0047] In some specific embodiments, a plurality of lifting devices are further provided on the bottom surface of the box body, and the lifting devices can be lifted to adjust the horizontal angle of the box body.

[0048] Since the operation of the oil-immersed transformer has strict requirements for the levelness, the mobile voltage regulating device not only needs to have a support with sufficient strength on site, but also needs to ensure the levelness. A plurality of lifting mechanisms for adjusting the height of the adjusting base are uniformly arranged on the bottom end surface of the mobile voltage regulating device of the present invention, and a horizontal bottom plate is fixedly arranged at the bottom of the lifting mechanism to improve the strength and facilitate the leveling operation. In this embodiment, the lifting mechanism adopts an adjustable lead screw structure.

[0049] In some specific embodiments, a level gauge is further included, and the level gauge is arranged on the box body.

[0050] Specifically, spirit levels for detecting the levelness of the mobile base are respectively embedded at the edges around the bottom of the box body.

[0051] In some specific embodiments, the box body further includes a rain shield, and the rain shield is arranged above the terminal block.

[0052] Since the present invention needs to be connected to the overhead line through a cable when it is put into line operation, the terminal block is installed on the outer side wall of the box body, and a rain shield is fixedly arranged on the side wall above the terminal block to improve the safety performance.

[0053] When the present invention works, first, according to the line voltage regulation requirement, it is moved to the line connection point by a tractor, and the grounding wire of the present invention is connected to the grounding wire of the tie switch pole. Then, it is confirmed whether the gear position of the voltage regulator is in the 1:1 gear position, that is, the fifth gear; then, the silicone cable or flexible cable fixedly connected to one end of the terminal block is hung on both ends of the overhead line tie switch through a quick-install wire clamp; finally, a semi-fixed fence is set around the present invention for protection, and the preparation work is ready.

[0054] Secondly, the tie switch is disconnected, and the mobile voltage regulating device 100 of the present invention is powered on. The controller 410 controls the closing of the first high-voltage circuit breaker QF1 and the second high-voltage circuit breaker QF2. The line voltage and current values are collected through the first voltage transformer PT1, the second voltage transformer PT2 and the current transformer CT1 and sent to the controller 410. The controller 410 sends a gear adjustment instruction to the voltage regulating component 30 for voltage regulation according to the current voltage and current values. After the voltage regulation is completed, the reactive power to be compensated can be calculated according to the real-time voltage and current values, and a compensation instruction is sent to the high-voltage reactive power compensator 420 to perform reactive power compensation on the line.

[0055] The present invention has a power-off protection function: when the line is operating normally, in the event of a power outage, the controller 410 can continue to operate for a short time using the backup power supply, and at the same time, activate the power-off protection (with a 100 ms delay after power-off), disconnecting the first high-voltage circuit breaker QF1 and the second high-voltage circuit breaker QF2; when the line power supply is restored, after a settable delay, the tap-changer is adjusted to the reference position (1:1 position), and then the first high-voltage circuit breaker QF1 and the second high-voltage circuit breaker QF2 are closed to continue the voltage regulation operation.

[0056] When the faulty line is restored and it is necessary to remove the present invention, first control the first high-voltage circuit breaker QF1 and the second high-voltage circuit breaker QF2 to disconnect, and after discharging the mobile voltage regulation device 100 of the present invention, it can be removed.

[0057] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0058] The above-described embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A mobile pressure regulating device, characterized in that, It includes a box body, a voltage regulating component, a first switch component, a second switch component, a control component and a terminal block. The terminal block is arranged outside the box body. The first switch component and the second switch component are respectively electrically connected to the terminal block. The other ends of the first switch component and the switch component are respectively electrically connected to the voltage regulating component. The voltage regulating component is connected in series between the first switch component and the second switch component. The controlled ends of the first switch component, the second switch component and the voltage regulating component are respectively connected to the output end of the control component.

2. The mobile pressure regulating device according to claim 1, characterized in that, The first switch component includes a first high-voltage circuit breaker and a first voltage transformer. The second switch component includes a second high-voltage circuit breaker and a second voltage transformer. The output end of the voltage regulating component is connected in series to the first voltage transformer. The output ends of the first voltage transformer, the second voltage transformer and the first current transformer are connected to the signal input end of the control component. The signal output end of the control component is connected to the controlled ends of the first high-voltage circuit breaker, the second high-voltage circuit breaker and the voltage regulating component.

3. The mobile pressure regulating device according to claim 1, characterized in that, Both the first switch component and the second switch component include lightning arresters.

4. The mobile pressure regulating device according to claim 1, wherein The control component also includes a high-voltage reactive power compensator.

5. The mobile voltage regulating device according to claim 1, characterized in that, The box body is divided into multiple cavities to isolate the voltage regulating component, the first switch component, the second switch component and the control component.

6. The mobile pressure regulating device according to claim 5, characterized in that, The box body also includes a first door. The opening and closing of the first door can connect or isolate the first switch component, the second switch component, the control component and the outside.

7. The mobile pressure regulating device according to claim 1, characterized in that, The box body also includes a second door. The opening and closing of the second door can connect or isolate the voltage regulating component and the outside.

8. The mobile pressure regulating device according to claim 1, wherein Several lifting devices are also arranged on the bottom surface of the box body. The lifting devices can be lifted to adjust the horizontal angle of the box body.

9. The mobile pressure regulating device according to claim 1, wherein It also includes a level meter, and the level meter is arranged on the box body.

10. The mobile pressure regulating device according to claim 1, characterized in that, The box body also includes a rain shield, and the rain shield is arranged above the terminal block.

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