A special device for SVG reactive power control unit

Abstract

The utility model discloses a kind of SVG reactive control unit special devices, including static var generator body, control unit, heat dissipation component and connecting interface component, static var generator body is double-layer metal shell structure, and the front is equipped with sealed door with observation window;Control unit is fixed in the body by mounting rail, and rear side is equipped with heat-conducting silica gel pad;Heat dissipation component contains axial flow fan group and heat dissipation pipeline, heat dissipation pipeline is serpentine circuitous structure and is equipped with heat dissipation fin, and is attached with axial flow fan group, and cooperates circulating water cooling heat dissipation;Temperature sensor is distributed arrangement, and fan rotating speed is accurately controlled.Connecting interface component realizes and is connected with external device.This device is through high-efficiency heat dissipation, stable installation and reliable shielding design, improves operating stability, and is suitable for reactive control scene.

Description

Technical Field

[0001] This utility model relates to the technical field of reactive power compensation equipment in power systems, specifically a dedicated device for reactive power control unit of SVG (Static Var Generator). By optimizing the heat dissipation structure, installation adaptability, and temperature control strategy, it achieves efficient heat dissipation, stable operation, and convenient maintenance of the control unit. It is suitable for reactive power compensation scenarios in high-voltage / low-voltage distribution networks, improving the reliability and intelligence level of SVG systems. Background Technology

[0002] SVG, or Static Var Generator, has a reactive power control unit that is a key component of the SVG system, primarily responsible for the precise control and management of reactive power. The SVG reactive power control unit monitors electrical parameters such as voltage and current in the power grid in real time, calculates the current reactive power demand of the grid, and then controls the power switching devices (such as IGBTs, Insulated Gate Bipolar Transistors) in the SVG main circuit to adjust the output reactive current, achieving rapid and accurate reactive power compensation. Simply put, when the grid requires inductive reactive power, the SVG reactive power control unit controls the SVG device to output inductive reactive power; when the grid requires capacitive reactive power, the SVG reactive power control unit controls the SVG device to output capacitive reactive power, thereby maintaining grid voltage stability and improving the power factor of the power system.

[0003] Traditional SVG reactive power control units often employ a single air-cooled or water-cooled design. The heat dissipation method has poor fit with the heat-generating components (power modules, CPU chips), resulting in high thermal resistance. Furthermore, they lack precise temperature monitoring and differentiated heat dissipation control, making them prone to localized overheating, which can lead to derating or malfunctions. Control units are mostly fixed installations without layered adjustment rails, requiring new holes to be drilled when adapting to modules of different sizes. Cables lack dedicated storage channels, resulting in messy wiring and increased maintenance difficulty, especially in industrial-grade SVG systems (multiple modules in parallel), leading to low maintenance efficiency.

[0004] Therefore, it is necessary to design a dedicated device for SVG reactive power control unit to solve the problems mentioned above. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a dedicated device for SVG reactive power control units, which achieves precise heat dissipation, convenient operation and maintenance, strong environmental adaptability, and intelligent collaboration through optimized structural design and functional integration.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This device includes a static var generator body, a control unit, a heat dissipation assembly, and a connection interface assembly. All parts work together to ensure the stable and efficient operation of the SVG reactive power control unit.

[0008] Furthermore, the static var generator body adopts a double-layer metal shell structure, with an outer layer of cold-rolled steel plate and an inner layer of aluminum alloy plate. The two layers are filled with heat-insulating and sound-insulating cotton with a thickness of 5-8mm, which effectively blocks external heat, noise and electromagnetic interference. The front of the static var generator body is equipped with a sealed door with an observation window. The observation window is made of tempered glass with a thickness of ≥5mm. Double rubber sealing strips are installed between the glass and the door frame to ensure a protection level of ≥IP54. The door is equipped with an electromagnetic shielding strip to further improve the electromagnetic shielding effectiveness.

[0009] Furthermore, the control unit is fixed inside the static var generator cabinet via a mounting rail. The mounting rail has a layered slide rail structure, with each layer having a slide rail and positioning holes. Adjusting bolts are provided on both sides of the slide rail to accommodate control units with a width of 50-200mm. A wiring channel is provided on the side for neatly storing cables and avoiding messy wear.

[0010] The rear surface of the control unit is provided with a thermally conductive silicone pad, which fits tightly with the heat dissipation pipes of the heat dissipation component to achieve rapid heat dissipation.

[0011] Furthermore, the heat dissipation component consists of an adjustable-speed axial fan assembly at the back of the cabinet and heat dissipation pipes inside the cabinet, which, together with distributed temperature sensors, enables precise and differentiated heat dissipation.

[0012] Axial fan assembly: contains multiple axial fans, with a speed adjustment range of 800-2000r / min. It monitors the temperature inside the cabinet through a temperature sensor and automatically adjusts the speed when the temperature exceeds the threshold. The fan assembly is connected to the back of the cabinet via shock-absorbing rubber pads.

[0013] Heat dissipation pipes: Made of aluminum or copper, with a serpentine, meandering structure. The surface of the pipes is equipped with heat dissipation fins, perpendicular to the airflow direction of the axial fan assembly. Inlet and outlet water ports are provided at both ends of the pipes, and heat dissipation is enhanced by circulating water cooling.

[0014] Temperature sensors are distributed on the surfaces of key heat-generating components such as the power module and CPU chip of the control unit. The sampled data is weighted and calculated by the internal MCU to accurately control the speed of the axial fan group and achieve differentiated heat dissipation.

[0015] Furthermore, the connection interface assembly is located on the side of the static var generator body, including a power interface, a signal interface, and a communication interface, for connecting the static var generator body, control unit, and external equipment (such as power grid, monitoring system); the interface is equipped with a waterproof sealing ring and a dust cover, with a protection level ≥ IP67, effectively preventing dust and moisture intrusion and ensuring stable signal and power transmission.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] In this utility model, the following effects can be achieved by setting a special device for the SVG reactive power control unit: 1. The serpentine water-cooled pipes, heat dissipation fins and thermal conductive silicone pads are tightly attached; the distributed temperature sensors accurately cover key heat points, and the MCU dynamically adjusts the axial fan speed to ensure that the maximum temperature of the control unit is ≤60℃ (when the ambient temperature is 40℃), thereby improving the full-capacity operation rate of the equipment; the heat dissipation is intelligently adjusted according to the temperature difference of key components, adapting to power grid fluctuation scenarios, with a heat dissipation response time of ≤2 seconds, ensuring the rapid reactive power response capability of the SVG; 2. The layered slide rail supports ±10mm width adjustment, without the need for additional drilling, and the installation adaptation time is ≤10 minutes / module; the wiring trough neatly stores cables, reducing wear and extending cable life; the quick-release cabinet design combined with the convenient installation structure shortens the single maintenance time, especially suitable for rapid maintenance of multi-module SVG systems. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the present invention;

[0020] Figure 3 This utility model Figure 2 Front view structural diagram;

[0021] Figure 4 This is a schematic diagram of the back structure of this utility model.

[0022] In the diagram: 1. Static var generator body; 11. Sealed door; 2. Control unit; 21. Mounting rail; 3. Heat dissipation assembly; 31. Axial fan assembly; 32. Heat dissipation pipe; 321. Water inlet; 322. Water outlet; 4. Connection interface assembly. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0025] Example 1

[0026] Please see Figure 1 This embodiment provides a dedicated device for an SVG reactive power control unit, comprising:

[0027] The static var generator body 1 is a double-layer metal shell structure. The outer layer is made of cold-rolled steel plate and the inner layer is made of aluminum alloy plate. The two layers are filled with heat insulation and sound insulation cotton. The front is equipped with a sealed door 11 with an observation window and an electromagnetic shielding strip.

[0028] The control unit 2 is fixedly installed inside the cabinet of the static var generator body 1 via the mounting rail 21;

[0029] The heat dissipation component 3 includes an adjustable speed axial flow fan group 31 at the back of the cabinet and a corresponding heat dissipation pipe 32 inside the cabinet. At the same time, the temperature of the control unit 2 inside the cabinet is monitored by a temperature sensor.

[0030] The connection interface component 4 is located on the side of the static var generator body 1 and includes a power interface, a signal interface, and a communication interface, which are used to connect the static var generator body 1 and the control unit 2 to external devices.

[0031] Example 2

[0032] Please see Figure 1 as well as Figure 4 Based on Embodiment 1, this embodiment further defines the axial fan group 31 of the heat dissipation component 3 as containing multiple axial fans, with a speed adjustment range of 800-2000 r / min and a temperature sensor monitoring range of 0-80℃.

[0033] Example 3

[0034] Please see Figure 2 as well as Figure 3 Based on Embodiment 1, this embodiment further specifies that the heat dissipation pipe 32 is made of aluminum or copper. The heat dissipation pipe 32 is provided with an inlet 321 and an outlet 322 at both ends. Heat dissipation is assisted by circulating water cooling. The heat dissipation pipe 32 is installed in close contact with the axial fan assembly 31.

[0035] Example 4

[0036] Please see Figure 3 Based on Embodiment 1, this embodiment further defines the heat dissipation pipe 32 as a serpentine meandering structure with an internal diameter ≥15mm, and heat dissipation fins on the surface of the pipe, which are perpendicular to the airflow direction of the axial fan assembly 31.

[0037] Example 5

[0038] Please see Figure 3Based on Embodiment 1, this embodiment further specifies that a thermally conductive silicone pad is provided on the rear surface of the control unit 2, which is in close contact with the heat dissipation fins of the heat dissipation pipe 32 to achieve rapid heat dissipation of the control unit 2.

[0039] Example 6

[0040] Please see Figure 3 Based on Example 1, this embodiment further specifies that the temperature sensor is distributed, specifically distributed on the surface of key heat-generating components such as the power module and CPU chip of the control unit 2. After the sampled data is weighted and calculated by the internal MCU, the speed of the axial fan group 31 is precisely controlled to achieve differentiated heat dissipation.

[0041] Example 7

[0042] Please see Figure 2 as well as Figure 3 Based on Embodiment 1, this embodiment further defines the installation track 21 as a layered slide rail structure, with each layer having a slide rail and positioning holes, and adjusting bolts on both sides of the slide rail for installing the control unit 2. At the same time, a wiring groove is provided on the side for neatly placing the cables of the control unit 2.

[0043] The working process of this utility model is as follows: When using this dedicated device for the SVG reactive power control unit, the static var generator body 1 is first connected to an external power source through the power interface of the connection interface assembly 4. The control unit 2 starts working, and the initial heat generated is transferred to the heat dissipation fins of the heat dissipation pipe 32 through the thermally conductive silicone pad on the rear surface. Temperature sensors distributed on the surfaces of key heat-generating components such as the power module and CPU chip of the control unit 2 start working and collect temperature data of each component in real time. The sampled data is weighted and calculated by the internal MCU. Based on the calculation results of the MCU, the speed of the axial fan group 31 in the heat dissipation assembly 3 is precisely controlled to achieve differentiated heat dissipation. At the same time, the heat dissipation pipe 32 forms a circulating water cooling system by taking in water through the inlet 321 and taking out water through the outlet 322. Combined with the serpentine meandering structure and the heat dissipation fins on the surface (and the axial fan group 31), the cooling system achieves a more efficient cooling effect. The airflow direction of the axial fan assembly 31 is vertical, which, together with the airflow of the axial fan assembly 31, achieves efficient heat dissipation. The axial fan assembly 31 is installed in close contact with the heat dissipation pipe 32 to further improve the heat dissipation efficiency. The control unit 2 is stably installed through the mounting rail 21. The wiring groove on the side of the mounting rail 21 is used to neatly place the cables of the control unit 2. The double-layer metal shell of the static var generator body 1 (outer layer cold-rolled steel plate, inner layer aluminum alloy plate, with heat insulation and sound insulation cotton filled between the two layers) and the sealed door 11 with electromagnetic shielding strip provide a stable operating environment for the internal components. At the same time, the internal situation can be observed through the observation window of the sealed door 11. The static var generator body 1 and the control unit 2 communicate with external devices through the signal interface and communication interface of the connection interface assembly 4 to ensure that the device works in coordination with the external system.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dedicated device for an SVG reactive power control unit, characterized in that, include: The static var generator body (1) is a double-layer metal shell structure. The outer layer is made of cold-rolled steel plate and the inner layer is made of aluminum alloy plate. The two layers are filled with heat insulation and sound insulation cotton. The front is equipped with a sealed door (11) with an observation window and an electromagnetic shielding strip. The control unit (2) is fixedly installed inside the cabinet of the static var generator body (1) via the mounting rail (21); The heat dissipation component (3) includes an adjustable speed axial flow fan group (31) on the back of the cabinet and a heat dissipation pipe (32) corresponding to the inside of the cabinet. At the same time, the temperature of the control unit (2) inside the cabinet is monitored by a temperature sensor. The connection interface component (4) is located on the side of the static var generator body (1) and includes a power interface, a signal interface and a communication interface, which are used to connect the static var generator body (1) and the control unit (2) to external devices.

2. The dedicated device for an SVG reactive power control unit according to claim 1, characterized in that: The heat dissipation component (3) has an axial fan group (31) containing multiple axial fans with a speed adjustment range of 800-2000 r / min and a temperature sensor monitoring range of 0-80℃.

3. The dedicated device for an SVG reactive power control unit according to claim 1, characterized in that: The heat dissipation pipe (32) is made of aluminum or copper. The heat dissipation pipe (32) has an inlet (321) and an outlet (322) at both ends. It is cooled by circulating water. The heat dissipation pipe (32) is installed in close contact with the axial fan assembly (31).

4. The dedicated device for an SVG reactive power control unit according to claim 3, characterized in that: The heat dissipation pipe (32) has a serpentine structure with an internal diameter of ≥15mm. The surface of the pipe is provided with heat dissipation fins, which are perpendicular to the airflow direction of the axial fan assembly (31).

5. A dedicated device for an SVG reactive power control unit according to claim 1, characterized in that: The rear surface of the control unit (2) is provided with a thermally conductive silicone pad, which is closely attached to the heat dissipation fins of the heat dissipation pipe (32) to realize the rapid heat dissipation of the control unit (2).

6. The dedicated device for an SVG reactive power control unit according to claim 1, characterized in that: The temperature sensors are distributed in a distributed manner, specifically on the power module of the control unit (2) and the surface of the heat-generating components of the CPU chip. After the sampled data is weighted and calculated by the internal MCU, the speed of the axial fan group (31) is precisely controlled to achieve differentiated heat dissipation.

7. A dedicated device for an SVG reactive power control unit according to claim 1, characterized in that: The installation rail (21) is a layered slide rail structure. Each layer is provided with a slide rail and a positioning hole. Adjustment bolts are provided on both sides of the slide rail for installing the control unit (2). At the same time, wiring grooves are provided on the side for neatly placing the cables of the control unit (2).

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