Modularized box-type transformer substation based on drawer cabinet

Abstract

The utility model relates to a modularized box transformer substation based on a drawer cabinet for a circuit system. The modularized box transformer substation based on the drawer cabinet is convenient to disassemble and assemble, convenient to detect and maintain, high in adaptability and intelligent in operation and maintenance. The utility model relates to a modularized box transformer substation based on a drawer cabinet, which comprises a high-voltage cabinet, a low-voltage cabinet, a transformation cabinet and a base, and is characterized in that a high-voltage module for controlling a high-voltage circuit is arranged in the high-voltage cabinet; a low-voltage module for controlling a low-voltage circuit is arranged in the low-voltage cabinet; the high-voltage cabinet and the low-voltage cabinet are both arranged on the base, the transformation cabinet is detachably connected to the high-voltage cabinet and the low-voltage cabinet, the high-voltage module is electrically connected with the transformer, and the transformer is electrically connected with the low-voltage module.

Description

Technical Field

[0001] This utility model relates to a prefabricated substation, and more particularly to a modular prefabricated substation based on a drawer cabinet for use in circuit systems. Background Technology

[0002] Traditional prefabricated substations are not compact enough, occupy a large area, and have limited applicable space, making them unsuitable for the power needs of special environments. While Huabian's design solves the problem of compact structure, it is relatively simple, making the disassembly and replacement of high and low voltage distribution equipment cumbersome. Furthermore, it lacks adequate monitoring of current and voltage in the low-voltage circuit. The high-voltage side, being integrated with the Huabian enclosure, is constrained by internal space, making installation and maintenance extremely inconvenient and even posing certain safety hazards. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a modular prefabricated substation based on a drawer cabinet that is easy to assemble and disassemble, convenient to inspect and maintain, highly adaptable, and intelligently operated and maintained.

[0004] This utility model discloses a modular transformer substation based on a drawer cabinet, comprising a high-voltage cabinet, a low-voltage cabinet, a transformer cabinet, and a base. The high-voltage cabinet contains a high-voltage module for controlling the high-voltage circuit; the low-voltage cabinet contains a low-voltage module for controlling the low-voltage circuit; and the transformer cabinet contains a transformer. Both the high-voltage and low-voltage cabinets are mounted on the base, and the transformer cabinet is detachably connected to both the high-voltage and low-voltage cabinets. The high-voltage module is electrically connected to the transformer, and the transformer is electrically connected to the low-voltage module.

[0005] This utility model discloses a modular box-type transformer based on a drawer cabinet, wherein the high-voltage module includes a high-voltage circuit breaker and a handcart with wheels. The high-voltage circuit breaker is fixedly mounted on the handcart, and the handcart is slidably mounted inside the high-voltage cabinet via the wheels. The high-voltage circuit breaker is electrically connected to the transformer.

[0006] This utility model discloses a modular box-type transformer based on a drawer cabinet, wherein the low-voltage module includes a modular circuit breaker electrically connected to the transformer and several modular drawers, each electrically connected to the modular circuit breaker. The modular circuit breaker is fixedly installed inside the low-voltage cabinet, and the several modular drawers are all slidably installed inside the low-voltage cabinet.

[0007] This utility model relates to a modular transformer substation based on a drawer cabinet, wherein each of the modular drawers is equipped with an observation window and an indicator light.

[0008] This utility model relates to a modular transformer substation based on a drawer cabinet, wherein the low-voltage cabinet is equipped with a maintenance passage.

[0009] This utility model discloses a modular transformer substation based on a drawer cabinet, wherein the low-voltage cabinet is also equipped with a communication room for monitoring the status of the modular transformer substation and transmitting data.

[0010] This utility model discloses a modular transformer substation based on a drawer cabinet, wherein the high-voltage cabinet, low-voltage cabinet, and transformer cabinet are all equipped with cabinet doors, and each cabinet door is equipped with a ventilation grille.

[0011] This utility model discloses a modular transformer substation based on a drawer cabinet, which also includes a top mount, which is installed on the top of the high-voltage cabinet and the low-voltage cabinet.

[0012] The difference between this utility model and the prior art lies in the fact that this utility model adopts a modular box-type transformer design that flexibly combines low-voltage switchgear, high-voltage switchgear, and transformer switchgear. The high-voltage circuit breaker is slidably installed in the high-voltage switchgear and connected to the high-voltage line transformer. The opening and closing of the high-voltage circuit is controlled by the opening and closing of the high-voltage circuit. The modular circuit breaker is fixedly installed in the low-voltage switchgear. Its multiple stationary contacts are respectively connected to the moving contacts in the corresponding modular drawers to realize the connection of the low-voltage lines. Then, the circuit on and off of the line is controlled by controlling the circuit breaker in each low-voltage line. Moreover, the modular drawers can be replaced and maintained at any time according to the power demand, thereby realizing the power supply of the circuit system through the modular box-type transformer.

[0013] The modular prefabricated transformer based on a drawer cabinet of this utility model has at least the following beneficial effects:

[0014] (1) The placement of high voltage switchgear and low voltage switchgear can be flexibly adjusted according to the actual site conditions. Common layout methods include back-to-back layout and side-by-side layout, which saves space and enhances the adaptability of modular transformers. Transformer switchgear can also be flexibly arranged according to the layout of high voltage switchgear and low voltage switchgear, which saves space and enhances the adaptability of modular transformers.

[0015] (2) The installation of the handcart facilitates the replacement and maintenance of the high-voltage circuit breaker. The detachable installation of the transformer in the transformer cabinet also facilitates later replacement and maintenance. The modular drawer configuration allows for appropriate additions or subtractions of the modular drawers according to actual power demand, or the addition of low-voltage cabinets, improving the adaptability of the modular transformer. Moreover, the low-voltage moving contacts in the modular drawers come in various specifications with different conductivity properties. This allows for the replacement of different specifications of modular drawers to meet different power demand, facilitates later low-voltage circuit maintenance, and the modular drawers are recyclable, which helps save costs.

[0016] (3) The maintenance passage is set up so that when one or more modular drawers need to be maintained or replaced, the staff only need to disconnect the circuit breaker of the circuit corresponding to the modular drawer, and then enter the low-voltage cabinet from the maintenance passage to operate. There is no need to disconnect the main power switch, which reduces a series of problems caused by power outage.

[0017] (4) With the establishment of a communication room, staff only need to check the information on the display screen to quickly understand the operating status of the modular transformer substation and then take corresponding measures, which greatly improves work efficiency and ensures the stable operation of the circuit system. In addition, the monitoring and control device can also send the status signal of the modular transformer substation to the remote mobile phone or host terminal in real time, so that staff can promptly detect faults and quickly carry out maintenance and repair, avoiding power outages or other safety accidents caused by information delays.

[0018] The present invention will be further described below with reference to the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a front view of a modular transformer substation based on a drawer cabinet according to this utility model;

[0020] Figure 2 This is a rear view of a modular transformer substation based on a drawer cabinet according to this utility model;

[0021] Figure 3 This utility model Figure 2 A magnified view of a section at point A in the middle;

[0022] Figure 4 This is a top view of a modular transformer substation based on a drawer cabinet according to this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the high-voltage circuit breaker of this utility model installed on a handcart. Figure 1 ;

[0024] Figure 6 This is a schematic diagram of the structure of the high-voltage circuit breaker of this utility model installed on a handcart. Figure 2 ;

[0025] Figure 7 This is a schematic diagram of the high-voltage circuit breaker of this utility model installed in a high-voltage cabinet;

[0026] Figure 8 This is a schematic diagram of another combination of the modular transformer substation based on drawer cabinet according to this utility model.

[0027] Figure label:

[0028] 01-High voltage switchgear; 11-High voltage circuit breaker; 12-Handcart; 13-Wheel; 14-Surge arrester; 15-Fridge door; 16-Ventilation grille; 02-Low voltage switchgear; 21-Modular drawer; 211-Observation window; 212-Indicator light; 22-Modular circuit breaker; 23-Maintenance passage; 24-Communication room; 03-Transformer switchgear; 31-Transformer; 32-Oil conservator; 33-Heat sink; 04-Base; 05-Top mount. Detailed Implementation

[0029] like Figure 1 , 2 As shown in Figure 4, this utility model discloses a modular transformer substation based on a drawer cabinet, comprising a high-voltage cabinet 01, a low-voltage cabinet 02, a transformer cabinet 03, and a base 04. The high-voltage cabinet 01 houses a high-voltage module for controlling the high-voltage circuit; the low-voltage cabinet 02 houses a low-voltage module for controlling the low-voltage circuit; and the transformer cabinet 03 houses a transformer 31. Both the high-voltage cabinet 01 and the low-voltage cabinet 02 are mounted on the base 04. The transformer cabinet 03 is detachably connected to both the high-voltage cabinet 01 and the low-voltage cabinet 02. The high-voltage module is electrically connected to the transformer 31, and the transformer 31 is electrically connected to the low-voltage module. The modular transformer substation based on the drawer cabinet also includes a top mount 05, which is positioned on top of the high-voltage cabinet 01 and the low-voltage cabinet 02.

[0030] The high-voltage switchgear 01 and the low-voltage switchgear 02 are fixed to the pre-set mounting holes on the base 04 by bolts or locking pins to ensure the stability of the high-voltage switchgear 01 and the low-voltage switchgear 02 during operation.

[0031] like Figure 1 and Figure 8 As shown, the placement of high-voltage switchgear 01 and low-voltage switchgear 02 can be flexibly adjusted according to the actual site conditions. A common arrangement is a back-to-back arrangement. Figure 1 (as shown) and side-by-side arrangement ( Figure 8 As shown in the figure, it saves space and enhances the adaptability of modular transformer substations.

[0032] After the high-voltage switchgear 01 and the low-voltage switchgear 02 are fixed, the top bracket 05 is firmly fixed to the top of the two switchgears with bolts. The length and width of the top bracket 05 are greater than the total length and width of the assembled high-voltage switchgear 01 and low-voltage switchgear 02. The top bracket 05 protects the switchgear and prevents rainwater and dust from entering the switchgear and causing short circuits or corrosion, thereby extending the service life of the modular transformer.

[0033] The transformer 03 is equipped with multiple connecting rods. Both the high-voltage switchgear 01 and the low-voltage switchgear 02 have matching mounting slots for these connecting rods. When the high-voltage switchgear 01 and low-voltage switchgear 02 are arranged back-to-back, the transformer 03 is inserted into the mounting slots on the side walls of the high-voltage switchgear 01 and low-voltage switchgear 02 via the connecting rods and locked with bolts or locking pins to ensure a stable connection. When the high-voltage switchgear 01 and low-voltage switchgear 02 are arranged side-by-side, the transformer 03 can be inserted into either the high-voltage switchgear 01 or the low-voltage switchgear 02. This flexible installation method can be adjusted according to the site conditions, thereby improving space utilization.

[0034] Transformer 31 is detachably fixed in transformer cabinet 03 by bolts. Its main function is to transform high-voltage or low-voltage electricity in the circuit system. Transformer 31 is equipped with oil conservator 32 and heat sink 33. The oil tank of transformer 31 is installed inside transformer cabinet 03, and oil conservator 32 is installed on the top of transformer cabinet 03 and connected to the oil tank of transformer 31 through a pipe. Figure 1 As shown, heat sink 33 is installed on the right side wall of transformer cabinet 03 and connected to the oil tank through a pipe, thus forming an oil circulation circuit.

[0035] The main function of the oil conservator 32 is to compensate for the volume change of the transformer oil in transformer 31 due to temperature variations. During operation, the oil temperature of transformer 31 changes with the load and ambient temperature, and the oil volume expands or contracts accordingly. The oil conservator 32 can store the excess transformer oil caused by temperature changes or replenish the missing transformer oil, ensuring that the transformer 31 oil tank is always full of oil, preventing air from entering the oil tank, and thus preventing the oil from being oxidized and damp.

[0036] When transformer 31 is running, the internal windings and core generate heat, raising the temperature of the surrounding transformer oil. According to the principle of heat convection, the hotter oil rises and flows into the heat sink 33, which is connected to the transformer 31's oil tank. As the hot oil flows through the heat sink 33, heat is dissipated into the surrounding air, causing the oil temperature to decrease. The lower-temperature oil becomes denser and naturally sinks, flowing back to the bottom of the transformer 31's oil tank, thus forming a transformer oil circulation process. The external mounting design of transformer cabinet 03 facilitates later maintenance and allows for easy replacement of parts or transformer 31.

[0037] The high-voltage module primarily manages and controls the high-voltage electricity, controlling the on / off state of the high-voltage circuit. The low-voltage module primarily manages and controls the low-voltage electricity after it has been transformed by transformer 31, controlling the on / off state of the low-voltage circuit. The high-voltage module and transformer 31 are electrically connected via a high-voltage cable, and the transformer 31 and the low-voltage module are electrically connected via a low-voltage cable.

[0038] In use, the modular transformer is connected to the circuit system. After power is applied, the high voltage first flows into the high voltage module. After being controlled by the high voltage module, the high voltage is safely and stably delivered to the transformer 31. After receiving the high voltage, the transformer 31 converts the high voltage into low voltage that meets the power demand. Then, the low voltage is delivered to the low voltage module. After being controlled by the low voltage module, the low voltage is finally delivered to each power line to complete the voltage distribution.

[0039] like Figure 5 , 6As shown in Figure 7, the high-voltage module includes a high-voltage circuit breaker 11 and a handcart 12 with wheels 13. The high-voltage circuit breaker 11 is fixedly mounted on the handcart 12, and the handcart 12 is slidably mounted in the high-voltage cabinet 01 via the wheels 13. The high-voltage circuit breaker 11 is electrically connected to the transformer 31.

[0040] At least four wheels 13 are provided on the handcart 12, symmetrically fixed in pairs at the bottom of the handcart 12 to support and move it. Two slide rails with locking mechanisms can also be installed at the bottom of the high-voltage cabinet 01, allowing the handcart 12 to move along the rails via the wheels 13. The locking mechanisms can also lock the handcart 12, ensuring smooth movement and precise connection. The high-voltage circuit breaker 11 is detachably fixed to the left side wall of the handcart 12 with bolts. This arrangement facilitates operation of the high-voltage circuit breaker 11 and makes future replacement and maintenance easier.

[0041] The high-voltage circuit is three-phase. The high-voltage cabinet 01 has a corresponding high-voltage interface on its exterior and a corresponding high-voltage stationary contact inside. The high-voltage interface connects to the external high-voltage line, transmitting high-voltage electricity to the high-voltage stationary contact inside the high-voltage cabinet 01. The high-voltage circuit breaker 11 has a high-voltage moving contact at its top that matches the high-voltage stationary contact, as well as a high-voltage output interface for connecting to the high-voltage input terminal of the transformer 31. To prevent the high-voltage box from being affected by lightning, a surge arrester 14 is installed on the left side wall of the handcart 12.

[0042] In use, first fix the high-voltage circuit breaker 11 onto the handcart 12, then push the handcart 12 into the high-voltage cabinet 01 until the high-voltage moving contact contacts the high-voltage stationary contact, then fix the handcart 12 through the locking mechanism, and then connect the high-voltage output interface to the high-voltage input terminal of the transformer 31 to complete the high-voltage circuit connection. By controlling the closing and opening of the high-voltage circuit breaker 11, the on and off of the high-voltage circuit can be controlled.

[0043] like Figure 2 , 3 As shown, the low-voltage module includes a modular circuit breaker 22 electrically connected to the transformer 31 and several modular drawers 21, each electrically connected to the modular circuit breaker 22. The modular circuit breaker 22 is fixedly installed inside the low-voltage cabinet 02, and the several modular drawers 21 are all slidably installed inside the low-voltage cabinet 02. Each of the modular drawers 21 is equipped with an observation window 211 and an indicator light 212. A maintenance passage 23 is provided inside the low-voltage cabinet 02.

[0044] The modular circuit breaker 22 is fixed to the upper left side of the low-voltage cabinet 02 by bolts. It is equipped with a low-voltage interface for connecting to the low-voltage output terminal of the transformer 31, as well as low-voltage stationary contacts that correspond one-to-one with the modular drawer 21, to ensure the tightness and firmness of the low-voltage circuit connection.

[0045] Each modular drawer 21 is equipped with a low-voltage moving contact that matches the corresponding low-voltage stationary contact. Each modular drawer 21 has a transparent observation window 211 and an indicator light 212 on its front side. The observation window 211 allows for easy observation of the connection status between the low-voltage moving contact and the low-voltage stationary contact within each modular drawer 21. When two contacts are in contact, the indicator light 212 illuminates. This allows operators to easily determine the connection status of each low-voltage circuit, effectively shortening testing time and improving work efficiency. The front side of the modular drawer 21 also features a switch, which can control the energization of the low-voltage moving contact and the low-voltage stationary contact by pulling out the modular drawer 21; it can also control the energization of the low-voltage moving contact individually, even when both contacts are fully in contact, by controlling the on / off state of the low-voltage circuit.

[0046] The modular drawers 21 are of uniform specifications and are evenly arranged horizontally and vertically within the low-voltage cabinet 02. The number of modular drawers 21 can be increased or decreased, or additional low-voltage cabinets 02 can be added, according to actual power demand, improving the adaptability of the modular transformer substation. Furthermore, the low-voltage moving contacts within the modular drawers 21 come in various specifications with different conductivity characteristics. This arrangement allows for the replacement of different specifications of modular drawers 21 to meet different power needs, facilitates subsequent low-voltage circuit maintenance, and enables the modular drawers 21 to be recycled, thus saving costs.

[0047] Each column of modular drawers 21 has a maintenance passage 23 on the right side. When one or more modular drawers 21 need to be maintained or replaced, the staff only needs to disconnect the circuit breaker of the circuit corresponding to the modular drawer 21, and then enter the low-voltage cabinet 02 through the maintenance passage 23 to operate. At this time, other low-voltage circuits are powered normally, and there is no need to disconnect the main power switch, reducing a series of problems caused by power outages.

[0048] In use, first connect the low-voltage interface of the modular circuit breaker 22 to the low-voltage output terminal of the transformer 31, then push several modular drawers 21 into the low-voltage cabinet 02 to make the low-voltage moving contact and the low-voltage stationary contact fully contact, thus connecting the low-voltage circuit. Then control the closing and opening of the modular circuit breaker 22, and observe the indicator light 212 on the modular drawer 21 to confirm the connection and disconnection of the low-voltage circuit, thereby realizing the control of the low-voltage circuit. The low-voltage circuit is connected to the power grid, thus realizing the conversion of high-voltage electricity into low-voltage electricity. Then, through the cooperation of the modular circuit breaker 22 and the modular drawer 21, multiple independent low-voltage lines are formed, and the low-voltage electricity is transmitted to the power grid for use by various power lines.

[0049] like Figure 2 As shown, the low-voltage cabinet 02 is also equipped with a communication room 24 for modular transformer status monitoring and data transmission.

[0050] A communication room 24 is set up in the upper right corner of the low-voltage cabinet 02. The communication room 24 is equipped with a modular transformer-specific monitoring and control device. This device has a display screen and is mainly used to monitor the voltage and current on both the high and low voltage sides of the transformer 31 in real time and display the monitoring data intuitively on the display screen.

[0051] Both the high-voltage switchgear 01 and the low-voltage switchgear 02 are equipped with temperature and humidity sensors and oil temperature sensors. The temperature and humidity sensors are used to monitor the temperature and humidity environment inside the switchgear, while the oil temperature sensors monitor the oil temperature of the transformer 31. These sensors collect the status information inside the switchgear in real time and transmit the signals to the measurement and control device.

[0052] The monitoring and control device can accurately locate the fault location of the modular transformer substation based on data feedback from sensors and determine whether maintenance is required. Staff can quickly understand the operating status of the modular transformer substation simply by checking the information on the display screen, and then take appropriate measures, greatly improving work efficiency and ensuring the stable operation of the circuit system.

[0053] In addition, the monitoring and control device can send the status signals of the modular transformer to a remote mobile phone or host in real time, so that staff can detect faults in time and carry out maintenance quickly, avoiding power outages or other safety accidents caused by information delays.

[0054] like Figure 1 , 2 As shown, the high-voltage switchgear 01, the low-voltage switchgear 02 and the transformer switchgear 03 are all equipped with cabinet doors 15, and each cabinet door 15 is equipped with a ventilation grille 16.

[0055] The cabinet doors 15 on the high-voltage switchgear 01, low-voltage switchgear 02, and transformer switchgear 03 are used to protect the internal equipment, preventing short circuits and rusting of components caused by rainwater and dust erosion, as well as excessive weathering due to prolonged exposure to the elements, thereby extending the service life of the modular transformer substation. Each cabinet door 15 is equipped with ventilation grilles 16 for ventilation and heat dissipation. These grilles allow for air exchange between the inside and outside of the cabinet, reducing the internal temperature and preventing excessive aging of components and safety accidents caused by overheating, ensuring the safe and efficient operation of the modular transformer substation.

[0056] It should be noted that the terms "center", "upper", "lower", "front", "rear", "left", "right", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0057] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0058] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A modular prefabricated substation based on a drawer cabinet, characterized in that: The system includes a high-voltage switchgear, a low-voltage switchgear, a transformer switchgear, and a base. The high-voltage switchgear contains a high-voltage module for controlling the high-voltage circuit; the low-voltage switchgear contains a low-voltage module for controlling the low-voltage circuit; and the transformer switchgear contains a transformer. Both the high-voltage and low-voltage switchgears are mounted on the base, and the transformer switchgear is detachably connected to both the high-voltage and low-voltage switchgears. The high-voltage module is electrically connected to the transformer, and the transformer is electrically connected to the low-voltage module.

2. The modular prefabricated substation based on a drawer cabinet according to claim 1, characterized in that: The high-voltage module includes a high-voltage circuit breaker and a handcart with wheels. The high-voltage circuit breaker is fixedly mounted on the handcart, and the handcart is slidably mounted inside the high-voltage cabinet via its wheels. The high-voltage circuit breaker is electrically connected to the transformer.

3. A modular prefabricated substation based on a drawer cabinet according to claim 2, characterized in that: The low-voltage module includes a modular circuit breaker electrically connected to the transformer and several modular drawers, each electrically connected to the modular circuit breaker. The modular circuit breaker is fixedly installed inside the low-voltage cabinet, and the several modular drawers are slidably installed inside the low-voltage cabinet.

4. A modular transformer substation based on a drawer cabinet according to claim 3, characterized in that: Each of the modular drawers is equipped with an observation window and an indicator light.

5. A modular prefabricated substation based on a drawer cabinet according to claim 4, characterized in that: The low-voltage cabinet is equipped with a maintenance access channel.

6. A modular prefabricated substation based on a drawer cabinet according to claim 5, characterized in that: The low-voltage cabinet is also equipped with a communication room for monitoring the status of modular transformer substations and transmitting data.

7. A modular prefabricated substation based on a drawer cabinet according to claim 6, characterized in that: The high-voltage switchgear, low-voltage switchgear, and transformer switchgear are all equipped with cabinet doors, and each cabinet door is equipped with a ventilation grille.

8. A modular prefabricated substation based on a drawer cabinet according to claim 7, characterized in that: It also includes a top mount, which is installed on top of the high-voltage switchgear and the low-voltage switchgear.

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