330kv mobile vehicle-mounted transformer

Abstract

The application discloses a 330KV mobile vehicle-mounted transformer, which comprises a transformer and a transport vehicle, wherein the transformer is arranged on the transport vehicle; the transformer comprises a transformer body and accessories; the transformer body comprises a body and a winding; the winding adopts an end-out line structure, and a first-end out line position is arranged on the lower end of the transformer body. The winding first-end out line position is arranged on the lower end of the transformer body, the out line position of the traditional transformer is changed from the upper end to the lower end, the height of the transformer is reduced, in addition, the winding is out lined through a winding sleeve, and the winding sleeve is at least partially arranged in a mailbox storage, so that a measuring device is saved, the overall height of the transformer is effectively reduced, and the transportation convenience is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of power transmission and transformation equipment technology, and in particular to a 330KV mobile vehicle-mounted transformer. Background Technology

[0002] On the one hand, with the high-quality development of the economy, the power load continues to rise, and the main transformer is heavily loaded and overloaded during periods of high load, which poses a serious challenge and potential hidden dangers to the safe and reliable operation of transformers. On the other hand, with the construction of the power grid, electrical connections are becoming increasingly close, and the problem of excessive short-circuit current has become an important factor restricting the development of the power grid.

[0003] Therefore, how to optimize the structure of mobile vehicle-mounted transformers has become an important technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the present invention provides a 330KV mobile vehicle-mounted transformer, which has the characteristics of compact structure, small size and convenient transportation.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A 330KV mobile vehicle-mounted transformer includes: a transformer and a transport vehicle;

[0007] The transformer is installed in the transport vehicle;

[0008] The transformer includes: the transformer body and accessories;

[0009] The transformer body includes: the transformer core and windings;

[0010] The winding adopts an end-out wire structure, with the first end of the wire located at the lower end of the device body.

[0011] Furthermore, the transformer body also includes: an oil tank;

[0012] The accessory includes: winding bushing;

[0013] The winding exits through the winding bushing;

[0014] The winding bushing is at least partially placed inside the oil tank.

[0015] Furthermore, the winding includes: a high-voltage winding, a medium-voltage winding, and a low-voltage winding;

[0016] The winding bushing includes: an oil-SF6 bushing and an oil-air bushing;

[0017] The low-voltage winding uses the oil-air bushing outlet;

[0018] The high-voltage winding and the medium-voltage winding respectively use the oil-SF6 bushing outlet.

[0019] Furthermore, the first end of the high-voltage winding is located between the phases of the transformer.

[0020] Furthermore, the accessory transformer also includes: a de-energizing switch;

[0021] The de-energized switch is located near the winding bushing of the medium-voltage winding.

[0022] Furthermore, the accessories include: an oil storage tank;

[0023] The connection end between the transformer body and the main pipeline of the oil conservator is located on the side of the oil conservator.

[0024] Furthermore, the magnetic circuit type of the transformer is either a three-phase five-limb type or a three-phase five-limb split-frame type.

[0025] Furthermore, the accessory also includes: a cooler;

[0026] The cooler is installed on the transport vehicle and located on the short shaft side of the transformer body;

[0027] The fans of the cooler are arranged laterally.

[0028] Furthermore, the accessories also include an integrated air-cooled control cabinet and terminal box.

[0029] Furthermore, the accessory also includes: a rectangular cross-section capsule-shaped oil storage tank.

[0030] As can be seen from the above technical solution, the 330kV mobile vehicle-mounted transformer provided by the present invention sets the first end of the winding at the lower end of the transformer body, changing the situation where the traditional transformer's output position is placed at the upper end, thereby reducing the height of the transformer; in addition, the windings are output through the winding bushings, and the winding bushings are placed at least partially in the oil tank, which eliminates the need for measuring devices, effectively reducing the overall height of the transformer and greatly improving the convenience of transportation. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1aThis is an autotransformer electrical connection diagram of a 330kV mobile vehicle-mounted transformer provided in an embodiment of the present invention;

[0033] Figure 1b This is a three-turn electrical connection diagram of a 330kV mobile vehicle-mounted transformer provided in an embodiment of the present invention;

[0034] Figure 2 This is a front view of the external shape of a 330kV mobile vehicle-mounted transformer provided in an embodiment of the present invention;

[0035] Figure 3 A top view of a 330kV mobile vehicle-mounted transformer provided in an embodiment of the present invention;

[0036] Figure 4 A side view of a 330kV mobile vehicle-mounted transformer provided in an embodiment of the present invention;

[0037] Figure 5 This is a schematic diagram of the internal structure of a 330kV mobile vehicle-mounted transformer with a three-phase five-column or three-phase five-column frame magnetic circuit, provided for embodiments of the present invention.

[0038] Wherein, 101-transformer; 102-transport vehicle; BT-transformer body; B01-low voltage winding, B02-medium voltage winding, B03-high voltage winding, B04-voltage regulating winding; TA-first high voltage winding start bushing, TB-second high voltage winding start bushing, TC-third high voltage winding start bushing; TAm-first medium voltage winding start bushing, TBm-second medium voltage winding start bushing, TCm-third medium voltage winding start bushing; Ta-first low voltage winding start bushing, Tb-second low voltage winding start bushing, Tc-third low voltage winding start bushing; T0-neutral point bushing; B1 1-Oil conservator; CT-Winding bushing; L11-First cooling device; L12-Second cooling device; KGA-First de-energizing switch; KGB-Second de-energizing switch; KGC-Third de-energizing switch; D01-Terminal box; ZN01-Intelligent cabinet; ZZ01-Main column one, ZZ02-Main column two, ZZ03-Main column three; PZ01-Side column one, PZ02-Side column two; ZE01-Main yoke one, ZE02-Main yoke two, ZE03-Main yoke three, ZE04-Main yoke four; PE01-Side yoke one, PE02-Side yoke two, PE03-Side yoke three, PE04-Side yoke four. Detailed Implementation

[0039] This invention discloses a 330kV mobile vehicle-mounted transformer. By setting the first end of the transformer winding to the lower end of the transformer body and having the winding bushing lead out, and placing at least part of the winding bushing in the oil tank, the overall height of the transformer is effectively reduced, resulting in a compact structure, small size, and convenient transportation.

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] This invention provides a 330kV mobile vehicle-mounted transformer, such as... Figure 2 As shown, it includes: transformer 101 and transport vehicle 102;

[0042] Transformer 101 is installed in transport vehicle 102;

[0043] Transformer 101 includes: the transformer body BT and accessories;

[0044] The transformer body BT includes: the transformer core and the windings;

[0045] The winding adopts an end-lead structure, with the first end located at the lower end of the transformer body.

[0046] It should be noted that the 330kV mobile vehicle-mounted transformer mainly consists of a transformer and a transport vehicle. By placing the transformer 101 on the transport vehicle 102, the transformer 101 can be transported quickly. The transformer 101 has a transformer body BT and accessories. The winding adopts an end-out structure. It is worth mentioning that in order to reduce the height of the transformer, the first end of the winding is located at the lower end of the transformer body, which changes the traditional position of the first end of the transformer.

[0047] As can be seen from the above technical solution, the 330kV mobile vehicle-mounted transformer provided in this embodiment of the invention greatly reduces the overall height of the transformer by changing the position of the outgoing line at the beginning of the winding.

[0048] Furthermore, the transformer body BT also includes: an oil tank;

[0049] The accessories include: winding bushings;

[0050] The windings exit through the winding bushings;

[0051] At least part of the winding bushing (such as its CT - i.e., current transformer) is placed inside the oil tank.

[0052] This solution eliminates the need for measuring devices by incorporating at least part of the winding bushing into the oil tank. Compared with existing technologies, it features a compact structure, small size, and convenient transportation.

[0053] To optimize the above technical solution, the winding includes: a high-voltage winding, a medium-voltage winding, and a low-voltage winding;

[0054] The winding bushings include: oil-SF6 bushings and oil-air bushings;

[0055] The low-voltage winding uses an oil-air bushing outlet, which can reduce costs;

[0056] The high-voltage winding and medium-voltage winding use oil-SF6 bushings for outgoing lines, which can significantly reduce the overall height of the transformer and reduce transportation restrictions.

[0057] To optimize the above technical solution, the first end of the high-voltage winding is located between phases of transformer 101.

[0058] It should be noted that the three-phase design of transformer 101 has a certain amount of space between each phase. Placing the high-voltage winding's first-end output position at the phase-to-phase position of transformer 101 ensures the insulation distance from the perspective of electric field issues, and also reduces the transportation size and transportation restrictions. This design scheme has the characteristics of compact structure and convenient transportation.

[0059] In this scheme, the transport vehicle 102 is equipped with a main pipeline for providing installation positions for oil-SF6 bushings and oil-air bushings; and the connection end between the transformer body BT and the main pipeline for the oil conservator is located on the side of the oil conservator B11.

[0060] It should be noted that the high-voltage, medium-voltage, and low-voltage windings are output through oil-SF6 bushings and oil-air bushings, and both oil-SF6 bushings and oil-air bushings are built into the oil tank. The connection end between the transformer body BT and the main pipeline of the oil conservator is set on the side of the oil conservator. While reducing the height of the transformer 101, the space management of the transformer is further optimized. Compared with the existing technology, it has the characteristics of small size and high aesthetics.

[0061] In this plan, such as Figure 3 As shown, the transformer accessories also include: a de-energizing switch;

[0062] The de-energized switch is located near the winding bushing of the medium-voltage winding.

[0063] It should be noted that the de-energizing switch is used to regulate the voltage of the transformer. In this embodiment of the invention, the de-energizing switch consists of a first de-energizing switch KGA, a second de-energizing switch KGB, and a third de-energizing switch KGC. The winding bushing consists of a high-voltage winding bushing, a medium-voltage winding bushing, and a low-voltage winding bushing. The medium-voltage winding bushing consists of a first medium-voltage winding start bushing TAm, a second medium-voltage winding start bushing TBm, and a third medium-voltage winding start bushing TCm. The first de-energizing switch KGA is placed on the first medium-voltage winding start bushing TAm, the second medium-voltage winding start bushing TBm, and the third medium-voltage winding start bushing TCm. The first de-energizing switch KGB is placed between the first bushing of the second medium-voltage winding TBm and the first bushing of the third medium-voltage winding TCm, and the third de-energizing switch KGC is placed between the first bushing of the third medium-voltage winding TCm and the short shaft of the transformer. By arranging the first de-energizing switch KGA, the second de-energizing switch KGB and the third de-energizing switch KGC near the high-voltage bushing, the width of the transformer is effectively reduced, thereby reducing transportation restrictions. Compared with the prior art, it has the characteristics of small transformer width and fewer transportation restrictions.

[0064] In this scheme, the magnetic circuit type of transformer 101 is either a three-phase five-limb type or a three-phase five-limb split-frame type.

[0065] It should be noted that the 330kV mobile vehicle-mounted transformer provided in this embodiment of the invention has a magnetic circuit consisting of main column one ZZ01, main column two ZZ02, main column three ZZ03, side column one PZ01, side column two PZ02, main yoke one ZE01, main yoke two ZE02, main yoke three ZE03, main yoke four ZE04, side yoke one PE01, side yoke two PE02, side yoke three PE03, and side yoke four PE04; its circuit consists of components mounted on main column one The low-voltage winding A01, medium-voltage winding A02, high-voltage winding A03, and voltage-regulating winding A04 are mounted on main column two. The low-voltage winding B01, medium-voltage winding B02, high-voltage winding B03, and voltage-regulating winding B04 are mounted on main column three. The low-voltage winding C01, medium-voltage winding C02, high-voltage winding C03, and voltage-regulating winding C04 are mounted on main column three. The placement of the windings and the lead-out method are determined by the impedance, insulation level, and the special transport dimensions required for the vehicle-mounted transformer. Furthermore, the windings are mounted sequentially from the inside out on main column one ZZ01, main column two ZZ02, and main column three ZZ03 in the order of low-voltage winding, medium-voltage winding, high-voltage winding, and voltage-regulating winding. This design significantly reduces the height of the yoke, thereby reducing the overall height of the transformer and minimizing transport restrictions. Compared with existing technologies, this design features a simple structure, small dimensions, and material savings.

[0066] In this scheme, the transformer accessories also include: a cooler;

[0067] The cooler is installed on the transport vehicle 102 and located on the short shaft side of the transformer body BT;

[0068] The fans of the cooler are arranged horizontally.

[0069] It should be noted that the cooler significantly aids in heat dissipation for transformer 101. By mounting it on the transport vehicle 102 and close to the short shaft side of the transformer body BT, it effectively dissipates heat from transformer 101. Figure 3 As shown, this embodiment of the invention provides a placement method for the air-cooled equipment (i.e., the aforementioned cooler). The first cooling device L11 and the second cooling device L12 are respectively placed on the short shaft of the transformer. In order to reduce the height and width of the transformer 101, the fan is arranged horizontally. This design has the characteristics of good heat dissipation performance and small size.

[0070] In this solution, transformer 101 also includes: a control module;

[0071] The control module includes: an air-cooled control cabinet and terminal box D01;

[0072] The air-cooled control cabinet is located in terminal box D01;

[0073] The air-cooled control cabinet is connected to the air-cooled equipment.

[0074] It should be noted that the transformer 101 is equipped with a control module, which mainly consists of an air-cooled control cabinet and a terminal box D01. The air-cooled control cabinet is connected to the air-cooling equipment and is used to control the working status of the air-cooling equipment to achieve the purpose of regulating the temperature of the transformer 101. The terminal box D01 is connected to the intelligent cabinet ZN01 and is used to input the transformer information to the intelligent cabinet ZN01 for display. In this embodiment of the invention, the air-cooled control cabinet and the terminal box are integrated into one unit, which greatly reduces the footprint. This design has the characteristics of high integration.

[0075] In this design, the oil storage tank is a rectangular cross-section capsule-type oil storage tank.

[0076] It should be noted that mobile transformers typically have strict requirements on their external dimensions. As a crucial component for storing, replenishing, and protecting insulating oil, the oil conservator needs to be installed on top of the transformer, thus becoming a decisive factor in determining the transformer's transport height. Conventional capsule-shaped oil conservators are generally cylindrical, which cannot fully utilize the space on top of the transformer, resulting in a relatively large height that is difficult to meet the requirements of mobile transformers. By using a rectangular cross-section capsule-shaped oil conservator, the internal volume of the oil conservator is effectively increased, thereby reducing the height of the conservator. This design solution features a large oil storage capacity and fewer transport restrictions.

[0077] The solution will now be further described with reference to specific embodiments.

[0078] This invention provides a 330kV mobile vehicle-mounted transformer. For example... Figure 2 The image shown is a front view of the 330kV mobile vehicle-mounted transformer disclosed in this embodiment. The transformer 101 is mounted on the transport vehicle 102.

[0079] like Figure 2 , Figure 3 and Figure 4 As shown, transformer 101 mainly includes: body BT, high voltage winding start bushings (TA, TB, TC), medium voltage winding start bushings (TAm, TBm, TCm), low voltage winding bushings (Ta, Tb, Tc), neutral point bushing (T0), protection equipment (B11), cooling equipment (L11 and L12), as well as no-excitation switches (KGA, KGB, KGC), terminal box (D01), and intelligent cabinet (ZN01).

[0080] like Figure 2 , Figure 3 and Figure 4 As shown:

[0081] The high-voltage and medium-voltage windings use oil-SF6 bushings for outgoing lines, while the low-voltage windings and neutral point use oil-air bushings for outgoing lines. This can significantly reduce the overall height of the transformer and reduce transportation restrictions.

[0082] The winding bushing CT is built into the oil tank, eliminating the need for measuring devices, effectively reducing the overall height of the transformer and minimizing transportation restrictions.

[0083] By adopting a rectangular cross-section capsule-type oil conservator and connecting the transformer body and the main pipeline of the oil conservator on the side of the oil conservator, the overall height of the transformer can be reduced while meeting the transformer's requirements for the oil conservator, thus reducing transportation restrictions.

[0084] An improved cooler is used, and the fan is arranged laterally and placed on the short shaft side, which can reduce the overall height and width of the transformer and reduce transportation restrictions.

[0085] Placing the non-excitation tap changer near the high-voltage bushing can reduce the width of the transformer and reduce transportation restrictions.

[0086] Placing the high-voltage winding's lead-out point between phases can reduce the transformer's width and alleviate transportation restrictions.

[0087] The air-cooled control cabinet and terminal box are integrated into one unit, which can effectively reduce the footprint of secondary equipment.

[0088] The starting ends of the high-voltage winding, medium-voltage winding, and low-voltage winding are all located at the lower end of the transformer body, which can effectively reduce the width of the transformer.

[0089] In this embodiment, the transformer adopts a three-phase five-limb or three-phase five-limb frame-type magnetic circuit design, which reduces the height of the yoke, thereby reducing the overall height of the transformer and minimizing transportation restrictions.

[0090] like Figure 5 As shown, the magnetic circuit of the 330kV mobile vehicle-mounted transformer consists of main column one ZZ01, main column two ZZ02, main column three ZZ03, side column one PZ01, side column two PZ02, main yoke one ZE01, main yoke two ZE02, main yoke three ZE03, main yoke four ZE04, side yoke one PE01, side yoke two PE02, side yoke three PE03, and side yoke four PE04. The circuit of this 330kV mobile vehicle-mounted transformer is composed of low-voltage winding A01, medium-voltage winding A02, high-voltage winding A03 and voltage regulating winding A04 mounted on main column one; low-voltage winding B01, medium-voltage winding B02, high-voltage winding B03 and voltage regulating winding B04 mounted on main column two; and low-voltage winding C01, medium-voltage winding C02, high-voltage winding C03 and voltage regulating winding C04 mounted on main column three.

[0091] The placement of the windings and the outgoing line method in the circuit of the 330kV mobile vehicle-mounted transformer of the present invention are determined by the impedance, insulation level and special transportation size requirements of the vehicle-mounted transformer. Figure 5 In the illustrated embodiment, each winding is sequentially mounted on main post one ZZ01, main post two ZZ02, and main post three ZZ03 in the order of low-voltage winding, medium-voltage winding, high-voltage winding, and voltage regulating winding from the inside out.

[0092] The present invention relates to a 330kV mobile vehicle-mounted transformer, in which the high-voltage, medium-voltage, and low-voltage windings all adopt an end-out structure, and in order to reduce the height of the transformer, the beginning ends of the high-voltage winding and the medium-voltage winding are located at the lower end of the transformer body.

[0093] In this embodiment of the invention, the relative placement of the transformer components is determined by factors such as the transport vehicle used to install the transformer, the size of the space where the equipment is placed, the insulation distance between components, and the external wiring arrangement. Simultaneously, transformer cost is considered, resulting in simple internal wiring, a compact structure, and minimal cost. The dimensions of the protective equipment in the oil conservator B11 are selected based on the oil weight of the main body BT, while the cooling devices L11 and L12 are selected based on product losses and temperature rise requirements.

[0094] In summary, the significance of this invention is that it solves the problem of large-scale and long-term power outages caused by transformer failures, enabling rapid power restoration and reducing the quality of life and economic losses of government agencies, enterprises, institutions, and residents caused by power outages. It represents a revolutionary breakthrough in the technological development of the power grid equipment manufacturing field.

[0095] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0096] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A 330KV mobile vehicle-mounted transformer, characterized in that, include: Transformer (101) and transport vehicle (102); The transformer (101) is installed on the transport vehicle (102); The transformer (101) includes: a transformer body (BT) and accessories; The transformer body (BT) includes: the transformer core and the windings; The winding adopts an end-out wire structure, with the first end out wire located at the lower end of the device body; The transformer body (BT) further includes: an oil tank; the accessories include: a winding bushing; the winding leads out through the winding bushing; the winding bushing is at least partially placed inside the oil tank; The windings include: a high-voltage winding, a medium-voltage winding, and a low-voltage winding; the starting ends of the high-voltage winding, the medium-voltage winding, and the low-voltage winding are all located at the lower end of the transformer body; the winding bushings include: an oil-SF6 bushing and an oil-air bushing; the low-voltage winding uses the oil-air bushing for its outgoing wire; the high-voltage winding and the medium-voltage winding both use the oil-SF6 bushing for their outgoing wires; The first end of the high-voltage winding is located between phases of the transformer (101); The accessories also include: a cooler; the cooler is disposed on the transport vehicle (102) and located on the short shaft side of the transformer body (BT); the fan of the cooler is arranged laterally.

2. The 330KV mobile vehicle-mounted transformer according to claim 1, characterized in that, The accessory also includes: a de-energizing switch; The de-energized switch is located near the winding bushing of the medium-voltage winding.

3. The 330KV mobile vehicle-mounted transformer according to claim 1, characterized in that, The accessories include: oil storage tank (11); The connection end between the transformer body (BT) and the main pipeline of the oil conservator is located on the side of the oil conservator (11).

4. The 330KV mobile vehicle-mounted transformer according to claim 1, characterized in that, The magnetic circuit type of the transformer (101) is a three-phase five-column type or a three-phase five-column split-frame type.

5. The 330KV mobile vehicle-mounted transformer according to claim 1, characterized in that, The accessories also include: an integrated air-cooled control cabinet and terminal box (D01).

6. The 330KV mobile vehicle-mounted transformer according to claim 1, characterized in that, The accessories also include: a rectangular cross-section capsule-shaped oil storage tank.

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