Unequal-voltage axial split type vehicle-mounted transformer substation capable of being transported at high speed

Abstract

The utility model relates to an unequal-voltage axial split type vehicle-mounted transformer station capable of high-speed transportation, which comprises a main transformer trailer, an auxiliary transformer trailer, a primary switch device and a secondary low-voltage switch device, the primary switch device is arranged in the main transformer trailer, and the secondary low-voltage switch device is arranged in the auxiliary transformer trailer; the primary switch equipment comprises a main transformer, and the main transformer comprises a low-voltage coil I, a low-voltage coil II, a high-voltage coil and a voltage regulating coil; the low-voltage coil I and the low-voltage coil II are wound on the same coil paper tube and coil stay, and the low-voltage coil II and the low-voltage coil I are sleeved with the high-voltage coil and the voltage regulating coil; the voltage grades of the low-voltage coil I and the low-voltage coil II are different; and the low-voltage coil I and the low-voltage coil II are respectively connected with the low-voltage switch equipment I and the low-voltage switch equipment II. The device has the advantages that the device can be realized only by two trailers, so that the space is saved, the control is convenient, and the on-site installation time and the transportation cost are saved.

Description

Technical Field

[0001] This utility model belongs to the technical field of vehicle-mounted substations, and in particular relates to a vehicle-mounted substation with axial splitting and unequal voltage that can be transported at high speed. Background Technology

[0002] A vehicle-mounted mobile substation is a substation that mounts the primary electrical equipment and secondary electrical systems of a traditional substation onto a flatbed trailer or container. It is highly mobile, occupies a small area, and is suitable for various locations, addressing diverse and sudden changes in power demand. Current split-type vehicle-mounted substations supply two identical voltage levels to their secondary outputs, providing only one power source. Vehicle-mounted substations supplying two secondary voltages are typically designed with a three-winding transformer. Each voltage level's low-voltage switchgear and control protection system requires its own trailer, necessitating a total of three trailers for such a substation, increasing transportation costs. Summary of the Invention

[0003] The purpose of this invention is to provide a vehicle-mounted substation with axial split design that can be transported at high speed with unequal voltages. It can be equipped with two trailers to form a vehicle-mounted substation, thereby reducing transportation costs.

[0004] To achieve the above objectives, this utility model employs the following technical solution:

[0005] A high-speed transportable axially split vehicle-mounted substation with unequal voltage includes a main transformer trailer, an auxiliary transformer trailer, a primary switchgear, and a secondary low-voltage switchgear. The primary switchgear is installed in the main transformer trailer, and the secondary low-voltage switchgear is installed in the auxiliary transformer trailer.

[0006] The primary switching equipment includes a main transformer, which includes a low-voltage coil one, a low-voltage coil two, a high-voltage coil, and a voltage regulating coil. Low-voltage coil one and low-voltage coil two are wound on the same coil paper tube and coil support bar. Low-voltage coil two and low-voltage coil one are packaged together with the high-voltage coil and the voltage regulating coil. The voltage levels of low-voltage coil one and low-voltage coil two are different. Low-voltage coil one and low-voltage coil two are respectively connected to low-voltage switchgear one and low-voltage switchgear two of the secondary low-voltage switching equipment.

[0007] The secondary low-voltage switchgear includes an auxiliary transformer, low-voltage switchgear I, low-voltage switchgear II, and a control system cabinet. Low-voltage switchgear I is connected to the auxiliary transformer, and the control parts of low-voltage switchgear I and low-voltage switchgear II are both connected to the control system cabinet.

[0008] The primary switching equipment also includes a diesel generator, a voltage transformer, a high-voltage combination switch, a control box, and a power cabinet. The diesel generator is connected to the power cabinet as a backup power source for the power station. The high-voltage combination switch is connected to the main transformer. The signals of the voltage transformer, the high-voltage combination switch, and the main transformer are all connected to the control box via cables. The control box is connected to the control cabinet on the auxiliary transformer trailer via cables.

[0009] The primary switching equipment also includes a diesel generator, a voltage transformer, a high-voltage combination switch, and a control box. The diesel generator is connected to the high-voltage combination switch via the voltage transformer. The high-voltage combination switch is connected to the main transformer. The main transformer is connected to the control box via a cable. The control box is connected to the control cabinet on the auxiliary transformer trailer via a cable.

[0010] The primary switching equipment also includes a surge arrester, which is connected to the high-voltage combination switch.

[0011] The main transformer trailer is equipped with a cable reel.

[0012] The main transformer also includes an upper yoke insulating plate, a lower yoke insulating plate, an upper pressure plate, and a lower pressure plate; the upper parts of the high-voltage coil and the second low-voltage coil are pressed and fixed by the upper yoke insulating plate and the upper pressure plate; the lower parts of the high-voltage coil and the first low-voltage coil are pressed and fixed by the lower yoke insulating plate and the lower pressure plate.

[0013] An electrostatic shield is provided between the upper part of the high-voltage coil and the upper yoke insulating plate, and between the lower part of the high-voltage coil and the lower yoke insulating plate.

[0014] The high-voltage coil adopts a corner ring structure with the wire exiting from the center.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model integrates low-voltage switchgear of two voltage levels into an auxiliary transformer trailer, sharing a single control and protection system and power supply system. Combined with a main transformer trailer, the entire vehicle-mounted substation requires only two trailers, saving space, facilitating control, and reducing on-site installation time and transportation costs.

[0017] 2. The main transformer of this utility model adopts an axially split structure with unequal voltage, which provides an additional secondary output voltage level compared to ordinary split-type vehicle-mounted substations. Compared with ordinary three-winding transformers, it saves space and reduces manufacturing costs.

[0018] 3. The main transformer has two low-voltage coils wound on the same coil paper tube, which saves space, reduces costs, and outputs different voltages to achieve the purpose of outputting two different voltage levels, making it convenient for the vehicle-mounted substation to meet multiple power supply needs. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of the main transformer trailer.

[0020] Figure 2 This is a structural diagram of the auxiliary transformer trailer.

[0021] Figure 3 This is a schematic diagram of the internal structure of the main transformer.

[0022] In the diagram: 1-Main transformer trailer; 2-Auxiliary transformer trailer; 3-Main transformer; 4-Diesel generator; 5-Voltage transformer; 6-High voltage combination switch; 7-Control box; 8-Surge arrester; 9-Cable reel; 10-Auxiliary transformer; 11-Low voltage switchgear one; 12-Low voltage switchgear two; 13-Control cabinet; 14-Air conditioner; 15-Power supply cabinet; 16-Control system cabinet; 17-Switch control room.

[0023] 301-Low-voltage coil one; 302-Low-voltage coil two; 303-High-voltage coil; 304-Voltage regulating coil; 305-Coil paper tube; 306-Coil support bar; 307-Upper yoke insulation plate; 308-Lower yoke insulation plate; 309-Upper pressure plate; 310-Lower pressure plate; 311-Electrostatic shield; 312-Corner ring. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings. However, it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0025] See Figures 1-3 A high-speed transportable axially split vehicle-mounted substation with unequal voltage includes a main transformer trailer 1, an auxiliary transformer trailer 2, primary switchgear, and secondary low-voltage switchgear. The primary switchgear is installed in the main transformer trailer 1, and the secondary low-voltage switchgear is installed in the auxiliary transformer trailer 2.

[0026] The primary switchgear includes main transformer 3, which comprises low-voltage coil 301, low-voltage coil 302, high-voltage coil 303, and voltage regulating coil 304. Low-voltage coil 301 and low-voltage coil 302 are wound on the same coil tube 305 and coil support bar 306. Low-voltage coil 302 and low-voltage coil 301 are packaged together with high-voltage coil 303 and voltage regulating coil 304. Low-voltage coil 301 and low-voltage coil 302 have different voltage levels: 11kV for low-voltage coil 301 and 6.3kV for low-voltage coil 302. Low-voltage coil 301 and low-voltage coil 302 are connected to low-voltage switchgear 11 (11kV) and low-voltage switchgear 12 (6.3kV) of the secondary low-voltage switchgear, respectively. Main transformer 3 achieves two different secondary voltage levels by axially splitting the low-voltage coils.

[0027] The primary switchgear also includes a diesel generator 4, a voltage transformer 5, a high-voltage combination switch 6, and a control box 7. The diesel generator 4 is connected to the power cabinet 15 as a backup power source for the power station. The high-voltage combination switch 6 is connected to the main transformer 3. The signals from the voltage transformer 5, the high-voltage combination switch 6, and the main transformer 3 are all connected to the control box 7 via cables. The control box 7 is connected to the control cabinet 13 on the auxiliary transformer trailer 2 via cables, sending control and protection signals to the control system cabinet 16 to achieve local control and protection of the power station. The signals can also be uploaded to the host computer via the communication equipment of the control system cabinet for remote control.

[0028] The main transformer 3 also includes an upper yoke insulating plate 307, a lower yoke insulating plate 308, an upper pressure plate 309, and a lower pressure plate 310. The upper parts of the high-voltage coil 303 and the second low-voltage coil 302 are pressed and fixed by the upper yoke insulating plate 307 and the upper pressure plate 309. The lower parts of the high-voltage coil 303 and the first low-voltage coil 301 are pressed and fixed by the lower yoke insulating plate 308 and the lower pressure plate 310, which serves to enhance the electrical insulation strength and mechanical strength. An electrostatic shield 311 is provided between the upper part of the high-voltage coil 303 and the upper yoke insulating plate 307, and between the lower part of the high-voltage coil 303 and the lower yoke insulating plate 308. The first low-voltage coil 301 has wires exiting from the side of the lower pressure plate 310 (LV1-1 and LV1-2), the second low-voltage coil 302 has wires exiting from the side of the upper pressure plate 309 (LV2-1 and LV2-2), and the high-voltage coil 303 has wires exiting from the side of the electrostatic shield 311 (3 and 3'). The high-voltage coil 303 adopts a corner ring 312 structure with the wires (1 and 1') exiting from the center.

[0029] On the main transformer trailer 1, from front to rear, there are cable reel 9, control box 7, main transformer 3, surge arrester 8, high voltage combination switch 6, voltage transformer 5, and diesel generator 4, which are electrically connected through cables and copper busbars to complete the power supply and control protection system.

[0030] The secondary low-voltage switchgear includes an auxiliary transformer 10, low-voltage switchgear one 11, low-voltage switchgear two 12, and a control cabinet 13. Low-voltage switchgear one 11 is connected to the auxiliary transformer 10, and the control sections of low-voltage switchgear one 11 and low-voltage switchgear two 12 are both connected to the control system cabinet 16. The auxiliary transformer 10 and the switch control room 17 are installed on the auxiliary transformer trailer 2. Inside the switch control room 17, from the front to the rear of the vehicle, are arranged an air conditioner 14, a control system cabinet 16, a power supply cabinet 15, low-voltage switchgear one 11, low-voltage switchgear two 12, and the control cabinet 13, which are used to complete the control and protection of the secondary system.

[0031] The main transformer 3 of this utility model has two parts of coil wound on the same low-voltage coil paper tube 305, which saves space, reduces costs, and can output different voltages respectively, so as to achieve the purpose of outputting two different voltage levels, making it convenient for vehicle-mounted substations to meet multiple power supply needs.

[0032] This invention integrates two low-voltage switchgear levels of a vehicle-mounted substation onto an auxiliary transformer trailer 2. Low-voltage switchgear 11 and low-voltage switchgear 21 share a common control, protection, and power supply system. Including the primary switchgear and the main transformer trailer 1, the entire vehicle-mounted substation can be achieved with only two trailers. The control box 7 on the main transformer trailer 1 is connected to the control cabinet 13 on the auxiliary transformer trailer 2 via cables, sending all control, protection, and metering signals from the main transformer trailer 1 to the auxiliary transformer trailer 2, thus completing the control and protection system of the entire substation. Compared to existing vehicle-mounted substations, this design eliminates the need for a separate trailer for one voltage level, saving space, reducing costs, facilitating control, saving on-site installation time, and maximizing the advantages of vehicle-mounted substations, enabling rapid and efficient on-site emergency power supply.

[0033] Through the above specific embodiments, those skilled in the art can easily implement this utility model. However, it should be understood that this utility model is not limited to the specific embodiments described above. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions. Due to space limitations and for the sake of brevity, not all of these combined solutions have been described. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-speed transportable axially split vehicle-mounted substation with unequal voltage, characterized in that, It includes a main transformer trailer, an auxiliary transformer trailer, primary switchgear, and secondary low-voltage switchgear. The main transformer trailer is equipped with primary switchgear, and the auxiliary transformer trailer is equipped with secondary low-voltage switchgear. The primary switching equipment includes a main transformer, which includes a low-voltage coil one, a low-voltage coil two, a high-voltage coil, and a voltage regulating coil. Low-voltage coil one and low-voltage coil two are wound on the same coil paper tube and coil support bar. Low-voltage coil two and low-voltage coil one are packaged together with the high-voltage coil and the voltage regulating coil. The voltage levels of low-voltage coil one and low-voltage coil two are different. Low-voltage coil one and low-voltage coil two are respectively connected to low-voltage switchgear one and low-voltage switchgear two of the secondary low-voltage switching equipment. The secondary low-voltage switchgear includes an auxiliary transformer, low-voltage switchgear I, low-voltage switchgear II, and a control system cabinet. Low-voltage switchgear I is connected to the auxiliary transformer, and the control parts of low-voltage switchgear I and low-voltage switchgear II are both connected to the control system cabinet.

2. The high-speed transportable axially split-type vehicle-mounted substation with unequal voltage as described in claim 1, characterized in that, The primary switching equipment also includes a diesel generator, a voltage transformer, a high-voltage combination switch, a control box, and a power cabinet. The diesel generator is connected to the power cabinet as a backup power source for the power station. The high-voltage combination switch is connected to the main transformer. The signals of the voltage transformer, the high-voltage combination switch, and the main transformer are all connected to the control box via cables. The control box is connected to the control cabinet on the auxiliary transformer trailer via cables.

3. A high-speed transportable axially split-type vehicle-mounted substation with unequal voltage as described in claim 2, characterized in that, The primary switching equipment also includes a surge arrester, which is connected to the high-voltage combination switch.

4. A high-speed transportable axially split-type vehicle-mounted substation with unequal voltage as described in claim 1, characterized in that, The main transformer trailer is equipped with a cable reel.

5. A high-speed transportable axially split-type vehicle-mounted substation with unequal voltage as described in claim 1, characterized in that, The main transformer also includes an upper yoke insulating plate, a lower yoke insulating plate, an upper pressure plate, and a lower pressure plate; the upper parts of the high-voltage coil and the second low-voltage coil are pressed and fixed by the upper yoke insulating plate and the upper pressure plate; the lower parts of the high-voltage coil and the first low-voltage coil are pressed and fixed by the lower yoke insulating plate and the lower pressure plate.

6. A high-speed transportable axially split-type vehicle-mounted substation with unequal voltage as described in claim 5, characterized in that, An electrostatic shield is provided between the upper part of the high-voltage coil and the upper yoke insulating plate, and between the lower part of the high-voltage coil and the lower yoke insulating plate.

7. A high-speed transportable axially split-type vehicle-mounted substation with unequal voltage as described in claim 1, characterized in that, The high-voltage coil adopts a corner ring structure with the wire exiting from the center.

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