Compact box-type substation

Abstract

The utility model discloses a compact box-type transformer substation, and the transformer substation comprises a box body which is internally provided with an installation space; the oil tank is arranged in the middle in the mounting space, a high-voltage chamber is arranged on the high-voltage side of the oil tank, a low-voltage chamber and an operation chamber are arranged on the low-voltage side of the oil tank, a circuit breaker and a mutual inductor are arranged in the high-voltage chamber in the longitudinal direction, and the low-voltage chamber and the operation chamber are arranged in parallel in the transverse direction. The high-voltage chamber longitudinally extends along the high-voltage side of the oil tank, so that high-voltage equipment such as a circuit breaker and a mutual inductor forms a longitudinal equipment belt perpendicular to the ground in a three-dimensional space, the axial arrangement not only compresses the transverse occupied space of the high-voltage equipment, but also deconstructs a high-voltage cabinet body in traditional plane arrangement into a three-dimensional integrated module through longitudinal stacked installation. A high-voltage conductor connection path is shortened.

Description

Technical Field

[0001] This application relates to the field of power equipment technology, and more specifically to a compact prefabricated substation. Background Technology

[0002] Currently, there are many types of prefabricated substation equipment on the market, with varying levels of quality. With the overall development of the new energy power system complete equipment industry and the continuous market demand in recent years, the structural design concepts of ring main unit equipment are no longer sufficient to meet current market requirements. To meet the ever-increasing demands of users, standardize product design, enhance the product lifespan, and facilitate product upgrades, we are comprehensively improving the product level of prefabricated substations in response to the emerging new technologies and processes in the market, in order to meet the rapidly developing market demands.

[0003] In the related technologies, the high-voltage cabinet and the enclosure of the box-type substation require a double fixing structure. The long distance between the high-voltage equipment and the transformer leads to the forced expansion of the horizontal dimension of the enclosure. At the same time, the circuit breaker switch is installed in a separate high-voltage cabinet and then hoisted into the box-type substation enclosure. It is necessary to balance the fixing of the high-voltage cabinet and the box-type substation, as well as the long distance between the transformer and the high-voltage connection. This results in the large volume and large footprint of the entire box-type substation, leading to high transportation costs.

[0004] Therefore, there is an urgent need for a highly compact prefabricated substation structure to solve the core problems of large footprint and low space efficiency in related technologies, and to meet the urgent needs of new power systems for high-density distribution nodes. Utility Model Content

[0005] The purpose of this application is to provide a compact prefabricated substation to solve the problem of large floor space required for prefabricated substations.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a compact prefabricated substation is provided, comprising: a prefabricated enclosure, wherein an installation space is provided inside the enclosure; an oil tank, wherein the oil tank is located in the middle of the installation space, wherein a high-voltage chamber is provided on the high-voltage side of the oil tank, and a low-voltage chamber and an operating room are provided on the low-voltage side of the oil tank, wherein a circuit breaker and an instrument transformer are provided in the longitudinal direction in the high-voltage chamber, and the low-voltage chamber and the operating room are arranged in parallel in the transverse direction.

[0007] As a preferred embodiment, the control room is equipped with a tap changer and an oil level gauge, and the tap changer and oil level gauge are connected to the low-pressure side end face of the oil tank.

[0008] As another preferred embodiment, the installation space is also provided with a base, and the compact box-type substation further includes: a station power transformer, which is fixedly connected to the base and placed in the operating room.

[0009] Further preferably, the top of the station power transformer is provided with a cover plate.

[0010] Further preferably, a linkage mechanism is provided, which is used for interlocking with the outer door of the high-pressure chamber.

[0011] Preferably, the outer door of the high-voltage chamber includes a right door and a left inner door, and the linkage mechanism includes a grounding interlocking rod, through which the right door and the left inner door of the high-voltage chamber are interlocked.

[0012] Preferably, the linkage mechanism further includes a locking plate, which is connected to the right door of the high-pressure chamber and is used for emergency unlocking of the outer door of the high-pressure chamber.

[0013] Preferably, a limit switch is provided between the interlocking plate and the grounding interlocking rod, and the limit switch is used to provide an alarm for accidental entry without power interruption.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] The compact prefabricated substation described in this application forms a radial functional module distribution system centered on the oil tank. The oil tank is positioned in the middle of the installation space, while the high-voltage room extends longitudinally along the high-voltage side of the oil tank. This allows high-voltage equipment such as circuit breakers and instrument transformers to form a vertical equipment belt perpendicular to the ground in three-dimensional space. This axial arrangement not only compresses the lateral space occupied by high-voltage equipment, but also deconstructs the traditional planar high-voltage cabinet into a three-dimensional integrated module through longitudinal stacking installation, thus shortening the high-voltage conductor connection path.

[0016] Meanwhile, the low-pressure room and the control room adopt a horizontal parallel layout design on the low-pressure side of the oil tank to create a functional combination area for operators. The coplanar arrangement of low-pressure equipment and operating mechanism shortens the distance of secondary circuit wiring, allowing operators to complete equipment monitoring and parameter adjustment within the same working radius. The horizontally expanded layout also reserves modular splicing interfaces for future capacity expansion. Attached Figure Description

[0017] Figure 1 This is a top-down structural diagram of a compact prefabricated substation.

[0018] Figure 2 This is a structural schematic diagram of a compact prefabricated substation from the front view.

[0019] Figure 3 This is a structural schematic diagram of a compact prefabricated substation viewed from the side.

[0020] In the diagram: 1. Compact prefabricated substation; 10. Box body; 20. Oil tank; 21. High-voltage side of oil tank; 22. Low-voltage side of oil tank; 30. High-voltage compartment; 31. Circuit breaker; 32. Instrument transformer; 33. Right door of high-voltage compartment; 34. Left inner door of high-voltage compartment; 40. Low-voltage compartment; 41. Low-voltage cabinet; 50. Control room; 51. Tap changer; 52. Oil level gauge; 53. Station power transformer; 54. Cover plate; 60. Base; 70. Linkage mechanism; 71. Grounding interlock rod; 72. Interlock plate; 80. Limit switch. Detailed Implementation

[0021] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0022] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. They should not be construed as limiting the specific protection scope of this application.

[0023] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0024] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0025] In a preferred embodiment, see Figures 1 to 3 A compact prefabricated substation 1 is provided, comprising: a box 10, with an installation space inside the box 10; an oil tank 20, which is located in the middle of the installation space; a high-voltage chamber 30 is provided on the high-voltage side 21 of the oil tank; a low-voltage chamber 40 and an operating room 50 are provided on the low-voltage side 22 of the oil tank; a low-voltage cabinet 41 is provided in the low-voltage chamber 40; a circuit breaker 31 and an instrument transformer 32 are provided in the high-voltage chamber 30 in the longitudinal direction; and the low-voltage chamber 40 and the operating room 50 are arranged in parallel in the transverse direction.

[0026] In this application, the compact prefabricated substation 1 forms a radial functional module distribution system centered on the oil tank 20. The oil tank 20 is positioned in the middle of the installation space, while the high-voltage room 30 extends longitudinally along the high-voltage side 21 of the oil tank. This allows high-voltage equipment such as circuit breakers 31 and instrument transformers 32 to form a vertical equipment belt perpendicular to the ground in three-dimensional space. This axial arrangement not only compresses the lateral space occupied by high-voltage equipment, but also deconstructs the traditional planar high-voltage cabinet into a three-dimensional integrated module through longitudinal stacking installation. This shortens the high-voltage conductor connection path and, while ensuring the flexible installation of circuit breakers 31, makes the installation of circuit breakers 31 more robust and reliable, and facilitates the conversion of production equipment in the workshop.

[0027] Meanwhile, the low-pressure chamber 40 and the control room 50 adopt a horizontal parallel layout design on the low-pressure side 22 of the oil tank to create a functional combination area for operators. The coplanar arrangement of low-pressure equipment and operating mechanism shortens the distance of secondary circuit wiring, allowing operators to complete equipment monitoring and parameter adjustment within the same working radius. The horizontally expanded layout also reserves modular splicing interfaces for future capacity expansion.

[0028] As a preferred option, see Figure 1 The control room 50 is equipped with a tap changer 51 and an oil level gauge 52, and the tap changer 51 and the oil level gauge 52 are connected to the low-pressure side 22 end face of the oil tank.

[0029] Tap changer 51, as the core actuator for voltage regulation, is integrated with oil level gauge 52 in the control room 50. The tap changer 51 and oil level gauge 52 are centrally located in the low-voltage side control room 50, forming a dedicated human-machine interface area. The ground-level layout of the control room 50 eliminates the need for maintenance work at height and avoids the traditional decentralized layout design, making the installation of tap changer 51 more robust and reliable. Preferably, oil level gauge 52 is equipped with an explosion-proof observation window, allowing for visual monitoring of various parameters, thus making the maintenance of the transformer substation described in this application more convenient and safe.

[0030] As another preferred option, a base 60 is also provided in the installation space. The compact box-type substation 1 also includes a station power transformer 53, which is fixedly connected to the base 60 and is placed in the control room 50.

[0031] Specifically, the station power transformer 53 is fixed to the base 60 and located in the space below the operating room 50. Preferably, the body of the station power transformer 53 is rigidly connected to the steel structure of the base 60 through a pre-embedded flange, and the station power transformer 53 can be compressed within a certain height range inside the operating room 50.

[0032] Further optimization involves providing a cover plate 54 on the top of the station power transformer 53. The cover plate 54 isolates the live parts from the external environment through a sealing structure, effectively preventing direct contact between the human body and the live parts and reducing the risk of electric shock.

[0033] Preferably, the cover plate 54 can be made of flame-retardant material and designed with a flow guiding structure.

[0034] Further preferred, the linkage mechanism 70 is used for interlocking with the outer door of the high-pressure chamber 30.

[0035] Preferably, the outer door of the high-voltage chamber 30 includes a right high-voltage chamber door 33 and a left high-voltage chamber inner door 34, and the linkage mechanism 70 includes a grounding interlocking rod 71, through which the right high-voltage chamber door 33 and the left high-voltage chamber inner door 34 are interlocked.

[0036] The grounding interlocking rod 71 is preferably a rigid metal rod used to laterally connect the right door 33 and the left inner door 34 of the high-voltage room, and is linked to the two doors through a hinge mechanism. When the opening action of either door exceeds a safety threshold, the grounding interlocking rod 71 will be triggered to move, driving the locking device into a locked state. The displacement of the grounding interlocking rod 71 is related to the energized state of the high-voltage equipment. If the busbar or cable inside the high-voltage room 30 is energized, the interlocking rod will mechanically limit and jam the door, preventing it from opening. Only when the grounding switch is closed, that is, when the equipment is completely de-energized, ensuring that the high-voltage room 30 is only in a safe state, will the grounding interlocking rod 71 release the lock on the door, allowing operators to enter.

[0037] Specifically, in this application, the left inner door 34 of the high-voltage room corresponds to the core area of ​​the high-voltage equipment, such as the busbar room, while the right door 33 of the high-voltage room serves as the outer door and the first layer of protection. The grounding interlock rod 71 mandates that the left inner door must be closed before the right outer door can be opened, or vice versa, ensuring that the operating sequence complies with safety regulations. For example, when the right door 33 of the high-voltage room is not fully closed, the grounding interlock rod 71 uses a limiting groove to lock the left inner door, preventing personnel from directly contacting the energized equipment.

[0038] Meanwhile, the left inner door 34 of the high-voltage room is used to isolate the high-voltage live area, while the right door 33 of the high-voltage room serves as an operating passage. The interlocking design forms a three-dimensional protection through horizontal rigid rods to ensure that the distance between the two doors meets the minimum electrical safety clearance requirements, while avoiding the waste of space caused by setting up a separate isolation wall.

[0039] Preferably, the linkage mechanism 70 further includes a locking plate 72, which is connected to the right door 33 of the high-voltage chamber. The locking plate 72 is used for emergency unlocking of the outer door of the high-voltage chamber 30. Specifically, the locking plate 72 is preferably a sliding or rotating structure. When it moves, it causes the grounding locking rod 71 to disengage from the locking slot. Thus, when the system malfunctions, such as the grounding locking rod 71 becoming stuck, or when emergency maintenance is required, the operator can drive the locking plate 72 with external force, such as manually pulling, rotating the handle, or using a special tool, to disengage it from the mechanical engagement with the grounding locking rod 71 and forcibly release the locking state.

[0040] Preferably, a limit switch 80 is provided between the interlocking plate 72 and the grounding interlocking rod 71. The limit switch 80 is used to provide an alarm for unauthorized entry without power interruption. Specifically, the limit switch 80 is located between the interlocking plate 72 and the grounding interlocking rod 71. The limit switch 80 is fixed at the end of the moving path of the grounding interlocking rod 71 or on the sliding track of the interlocking plate 72. Its contact state is directly related to the position of the door. By detecting the linkage between the opening and closing state of the outer door of the high-voltage chamber 30 and the energized state of the equipment, an alarm for unauthorized entry without power interruption is achieved.

[0041] Specifically, when the door is opened, the interlock plate 72 moves, causing the grounding interlock rod 71 to shift, releasing the mechanical triggering component of the limit switch 80 and switching the contact state. If the high-voltage equipment is still energized at this time, the limit switch 80 contacts will actuate after the door is opened, causing the circuit to be connected and triggering an audible and visual alarm. If the system is de-energized, even if the limit switch 80 actuates, the alarm circuit will be locked and no alarm will be triggered.

[0042] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A compact prefabricated substation, characterized in that, include: The enclosure contains an installation space. The oil tank is located in the middle of the installation space. A high-voltage chamber is provided on the high-voltage side of the oil tank, and a low-voltage chamber and an operating room are provided on the low-voltage side of the oil tank. A circuit breaker and a current transformer are provided in the high-voltage chamber in the longitudinal direction, and the low-voltage chamber and the operating room are arranged in parallel in the transverse direction.

2. The compact prefabricated substation as described in claim 1, characterized in that, The control room is equipped with a tap changer and an oil level gauge, and the tap changer and oil level gauge are connected to the low-pressure side end face of the oil tank.

3. The compact prefabricated substation as described in claim 1, characterized in that, The installation space also includes a base, and the compact prefabricated substation further includes: A station power transformer is fixedly connected to the base and is placed in the operating room.

4. The compact prefabricated substation as described in claim 3, characterized in that, The station power transformer is equipped with a cover plate on its top.

5. The compact prefabricated substation as described in claim 1, characterized in that, Also includes: A linkage mechanism is provided for interlocking with the outer door of the high-pressure chamber.

6. The compact prefabricated substation as described in claim 5, characterized in that, The outer door of the high-voltage chamber includes a right door and a left inner door. The linkage mechanism includes: A grounding interlocking rod is used to interlock the right door of the high-voltage room with the left inner door of the high-voltage room.

7. The compact prefabricated substation as described in claim 6, characterized in that, The linkage mechanism also includes a locking plate, which is connected to the right door of the high-pressure chamber and is used for emergency unlocking of the outer door of the high-pressure chamber.

8. The compact prefabricated substation as described in claim 7, characterized in that, A limit switch is provided between the interlocking plate and the grounding interlocking rod, and the limit switch is used to provide an alarm for accidental entry without power interruption.

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