A high-voltage line reactive power automatic compensation controller

Abstract

The utility model discloses a kind of high-voltage line reactive automatic compensation controllers, belong to the technical field of reactive power compensation of electric power system. Including base, front door and controller core unit, base and front door are enclosed to form the hollow cavity of six full-sealed;Front door inner wall adheres sealing gasket, base entry edge is provided with flanging, when closing, the sealing of both is pasted;Limit switch is equipped in base, pressure column is equipped in front door inboard, when closing door, pressure column triggers limit switch;Hollow cavity is installed controller core unit, it includes unit base, circuit board, unit cover and pasting film, and is equipped with exposed wiring terminal, SMA antenna seat and maintenance socket on circuit board.The utility model is excellent in sealing moisture-proof performance, with access control safety monitoring function, compact structure miniaturization, and maintenance upgrade exempts from disassembly, wiring is convenient, effectively improve the protection level, security and operation efficiency of equipment.

Description

Technical Field

[0001] This utility model belongs to the field of reactive power compensation technology in power systems, and in particular relates to an automatic reactive power compensation controller for high-voltage lines. Background Technology

[0002] The 10kV pole-mounted reactive power compensation device is an important piece of equipment for improving power quality and reducing line losses in distribution networks. Its main components include line sampling current transformers, drop-out fuses, surge arresters, capacitors, switching switches, protective current transformers, voltage transformers, enclosures, and high-voltage line reactive power compensation controllers. Among these, the high-voltage line reactive power compensation controller, as the core control component, is responsible for real-time monitoring of the grid's voltage, current, and power factor, and for automatically compensating for reactive power by calculating and controlling the switching of capacitors.

[0003] Power factor and reactive power balance are important indicators for measuring power grid quality. With the rapid development of rural power grids and modern industry in my country, the number of inductive loads and high-power converters, frequency converters, and other power electronic devices used in the power grid is increasing. These devices consume a large amount of reactive power during operation, leading to low power factor, degraded voltage quality, and increased line losses. Therefore, the development and application of high-performance automatic reactive power compensation controllers for high-voltage lines is of significant engineering importance for improving the power factor of the power grid, balancing reactive power flow, and reducing power losses.

[0004] However, existing high-voltage line reactive power compensation controllers still have some technical defects and shortcomings in actual outdoor operation environments, mainly in the following aspects: First, the sealing and protection performance is poor. The existing controller's outer casing and internal cavity sealing structure are relatively simple, lacking sufficient moisture and dust protection. During long-term outdoor operation, especially in humid, rainy, or snowy weather, external moisture can easily enter the casing and form condensation. Condensation dripping water can lead to a decrease in the insulation performance of internal electronic components, short circuits, and accelerated corrosion and aging of internal metal parts, seriously affecting the equipment's operational safety and service life.

[0005] Second, the wiring stability is insufficient. The design of the existing controller's wiring terminals and internal cable fixing methods is not reasonable enough. During long-term operation or when affected by external vibrations or temperature changes, the connecting wires are prone to loosening, slipping, or even breaking at the interface. This not only leads to distortion of the voltage and current data collected by the controller, affecting the accuracy and progress of reactive power compensation, but may also cause electrical faults and result in wasted electricity.

[0006] Third, maintenance and upgrade operations are cumbersome. The core unit (main control board) of the existing controller has an unreasonable packaging structure. When program upgrades or routine hardware maintenance are required, maintenance personnel usually need to completely disassemble the unit cover and unit socket, and remove the entire circuit board before they can perform the operation. This design not only increases the workload of disassembly and assembly and prolongs the power outage maintenance time, but also increases the maintenance cost.

[0007] Fourth, there is a lack of security monitoring and traceability capabilities. Existing controllers generally lack effective access control status monitoring mechanisms and cannot record and upload opening events in real time. In practical applications, unauthorized personnel frequently open boxes and misoperate, posing significant security risks. Furthermore, the lack of records of opening times and other event details makes it difficult to determine responsibility and trace the source of the incident.

[0008] In summary, in order to solve the problems of poor sealing, easy loosening of wiring, inconvenient maintenance and low safety in the existing technology, those skilled in the art urgently need a high-voltage line reactive power automatic compensation controller with good sealing, high protection level, stable wiring, convenient maintenance and safety monitoring function. Utility Model Content

[0009] In view of this, the present invention aims to propose an automatic reactive power compensation controller for high-voltage lines to solve the technical problems existing in the prior art, such as poor sealing performance, low protection level, easy condensation leading to decreased insulation performance, large equipment size making it inconvenient to transport, cumbersome maintenance and upgrades, and lack of open-box safety monitoring and event tracing capabilities.

[0010] To achieve the above objectives, the technical solution of this utility model is implemented as follows: A high-voltage line reactive power automatic compensation controller includes a base, a front door, and a controller core unit. The front door is installed on the inlet side of the base, and the two together form a hollow cavity structure. All six sides of the hollow cavity structure formed by the base and the front door are sealed structures, and none of the surfaces have air inlets. A sealing gasket is adhered to the inner wall of the front door, and a flange is provided at the inlet edge of the base. When the front door is closed, the sealing gasket and the flange are tightly fitted. A limit switch is installed inside the base, and a pressure post is provided on the inside of the front door. When the front door is closed, the pressure post aligns with the limit switch button and triggers the limit switch. The hollow cavity structure houses the controller core unit, which includes a unit base, a circuit board, a unit cover, and a film. The circuit board is mounted on the unit base, the unit cover is mounted on the unit base and covers the circuit board, and the film is adhered to the outer surface of the unit cover.

[0011] Furthermore, terminal blocks are soldered onto the circuit board, and wiring terminals are installed on the terminal blocks, with the wiring terminals exposed.

[0012] Furthermore, an SMA antenna mount is soldered onto the circuit board. The SMA antenna mount faces the same direction as the front door, and one end of the SMA antenna mount exposes the film. A maintenance socket is also soldered onto the circuit board. The maintenance socket is located near the unit cover, and the unit cover has a plug hole corresponding to the position of the maintenance socket.

[0013] Furthermore, it also includes a wireless communication module and an E-UK terminal fastener; the inner bottom surface of the base is welded with a wireless communication module rail, the extension direction of the wireless communication module rail is towards the front door, the wireless communication module is slidably mounted on the wireless communication module rail, and is fastened by the E-UK terminal fastener.

[0014] Furthermore, the bottom surface of the base is equipped with a suction cup antenna and a plastic cable fixing seat. The suction cup antenna is pressed by the antenna seat and locked and fixed by a hexagonal nut with a washer on the flange face.

[0015] Furthermore, two hanging ears and a handle are welded to the top surface of the base.

[0016] Furthermore, a limit switch mounting base is welded to the inner wall of the base, and the limit switch is installed on the limit switch mounting base; the pressure column is riveted to the inside of the front door.

[0017] Compared with the prior art, the automatic reactive power compensation controller for high-voltage lines of this utility model has the following advantages: (1) This utility model forms a hollow cavity structure with six sides fully sealed by the base and the front door, and there are no air inlets on the surface, which fundamentally blocks the way for external moisture to enter the box. Combined with the sealing gasket on the inner wall of the front door and the elastic buffer sealing design of the flanged edge of the base entrance, it effectively prevents the generation of condensation and water dripping in the outdoor humid environment, ensures the dryness of the internal electronic components, avoids short circuits and moisture aging, greatly improves the insulation performance and overall protection level of the equipment, and extends the service life of the equipment.

[0018] (2) This utility model has a pressure column installed on the inside of the front door and a limit switch installed at the corresponding position inside the base. When the front door is closed, the pressure column triggers the limit switch, and its status is uploaded to the upper system in real time; when unauthorized personnel open the box without authorization, the status of the limit switch changes and triggers an alarm record. This design effectively solves the problems of poor security of traditional controllers, frequent misoperation by unauthorized personnel, and difficulty in determining responsibility, and realizes real-time monitoring and accurate traceability of box opening events.

[0019] (3) This utility model directly welds the wireless communication module rail to the bottom surface of the base, replacing the traditional nut installation method, which greatly reduces the depth of the chassis. Combined with the integrated optimization of the internal circuit board, it realizes the miniaturization design of the controller. At the same time, the handle design welded to the top surface of the base allows the installer to carry the equipment safely and effortlessly when climbing the pole, avoiding the risk of the equipment falling and breaking, and also preventing cable damage caused by dragging. It eliminates the hoisting process and reduces the difficulty and cost of construction.

[0020] (4) The core unit of the controller of this utility model adopts a non-disassembly upgrade design. The circuit board is equipped with a maintenance socket, and the unit cover has corresponding plug holes. Maintenance personnel only need to lift a small part of the film on the surface of the unit cover to insert the upgrade plug through the plug hole to upgrade the program. There is no need to disassemble the unit cover and remove the circuit board, which greatly saves disassembly and maintenance time and reduces maintenance costs. In addition, the wiring terminals on the circuit board adopt an exposed design, which allows external cables to be directly crimped, further improving wiring efficiency.

[0021] (5) This utility model uses a built-in suction cup antenna on the bottom surface of the base and is secured with a hexagonal nut with a washer on the flange face, which solves the problem of outdoor installation gaskets easily falling off and avoids damage to the exposed antenna; a plastic cable fixing seat is used instead of a metal aviation plug, which reduces material costs; the universal hanging lug welded on the top surface can be adapted to standard mounting brackets, reducing the processing costs of non-standard customization. These detailed optimizations effectively control the overall manufacturing cost while ensuring equipment performance. Attached Figure Description

[0022] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a schematic diagram of the external appearance of the high-voltage line reactive power automatic compensation controller according to an embodiment of the present utility model; Figure 2 This is a bottom view schematic diagram of the high-voltage line reactive power automatic compensation controller according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the internal installation of the high-voltage line reactive power automatic compensation controller according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the access control system for the high-voltage line reactive power automatic compensation controller according to an embodiment of this utility model; Figure 5 This is a schematic diagram of the installation of the communication module of the high-voltage line reactive power automatic compensation controller according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the main control unit of the high-voltage line reactive power automatic compensation controller according to an embodiment of the present utility model; Figure 7 This is a cross-sectional schematic diagram of the main control unit of the high-voltage line reactive power automatic compensation controller according to an embodiment of the present utility model.

[0023] Explanation of reference numerals in the attached figures: 1. Base; 11. Handle; 12. Hanging ear; 13. Plastic cable holder; 14. Antenna holder; 15. Flange with washer hex nut; 16. Suction cup antenna; 17. Flanged edge; 18. Limit switch holder; 19. Wireless communication module rail; 2. Front door; 21. Sealing gasket; 22. Pressure column; 3. Controller core unit; 31. Wiring terminal; 32. Film; 33. Unit cover; 331. Plug hole; 34. Circuit board; 341. SMA antenna holder; 342. Maintenance socket; 343. Terminal block; 35. Unit holder; 4. Limit switch; 41. Limit switch button; 5. Wireless communication module; 6. E-UK terminal fixing piece. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figures 1 to 7 As shown, this embodiment provides a high-voltage line reactive power automatic compensation controller, mainly used in 10kV pole-mounted reactive power compensation devices, serving as the core control component of the device. The controller includes a base 1, a front door 2, a controller core unit 3, limit switches 4, a wireless communication module 5, and an E-UK terminal fixing piece 6.

[0029] A front door 2 is installed on the entrance side of the base 1. The base 1 and the front door 2 together form a hollow cavity structure, and the controller core unit 3 is installed inside the hollow cavity structure. Preferably, all six sides of the hollow cavity structure formed by the base 1 and the front door 2 are sealed structures, and there are no air inlets on the surface. This effectively prevents humid air from entering the box and avoids condensation forming inside the hollow cavity and dripping onto the circuit board, significantly improving the insulation performance and protection level of the equipment.

[0030] In a preferred embodiment of this utility model, the external mounting and wiring structure of the controller is further described in detail.

[0031] like Figure 1 and Figure 2 As shown, two hanging ears 12 are welded to the top surface of the base 1. The hanging ears 12 serve as universal mounting fasteners, used to support the overall weight of the equipment and to fix the base 1 to the pole via a mounting bracket. The dimensions of the hanging ears 12 are standardized, making them compatible with mounting brackets for other similar equipment, thus reducing the processing costs of non-standard customization.

[0032] A handle 11 is also welded to the top surface of the base 1. The handle 11 makes it easier for operators to carry the equipment when climbing the pole, avoiding the risk of the equipment falling and being damaged due to unstable grip during manual handling. It also avoids cable damage caused by dragging the bottom wiring cable, eliminates the hoisting process, reduces construction costs and improves operational safety.

[0033] like Figure 2 and Figure 3 As shown, a suction cup antenna 16 is mounted on the bottom surface of the base 1. The suction cup antenna 16 is pressed and fixed by the antenna seat 14 and locked by the flange face hexagonal nut 15 with a washer. Compared with the traditional method of installing flat pads and spring pads on utility poles, this utility model integrates the suction cup antenna 16 into the bottom of the chassis. This not only solves the problem of the pads easily falling off during outdoor installation, but also, since suction cup antennas are usually not glued, placing them at the bottom of the chassis will not affect the communication signal. At the same time, it avoids the risk of damage caused by exposed antennas and increases the overall protection of the equipment.

[0034] Continue to refer to Figure 2The base 1 also has a plastic cable holder 13 on its bottom surface for securing external access cables. Using a plastic cable holder instead of a traditional metal cable connector effectively reduces material costs and the expense of internal adapter cables.

[0035] In a preferred embodiment of this utility model, the access control and sealing structure of the controller is further described in detail.

[0036] like Figure 1 and Figure 4 As shown, a pressure post 22 is riveted inside the front door 2, and a sealing gasket 21 is also adhered to the inner wall of the front door 2. The sealing gasket 21 is made of a soft, elastic material. The entrance edge of the base 1 has an outwardly extending flange 17. When the front door 2 is closed, the sealing gasket 21 and the flange 17 fit tightly together, forming an elastic buffer sealing structure, which not only ensures excellent sealing and waterproofing effects, but also avoids damage to the seals from rigid impacts.

[0037] A limit switch mounting base 18 is welded to the inner wall of the base 1, and a limit switch 4 is installed on the limit switch mounting base 18. When the front door 2 is closed, the pressure column 22 aligns with the limit switch button 41 of the limit switch 4 and presses down the limit switch button 41, putting the limit switch 4 in a specific energized or de-energized state. The switching status of the limit switch 4 is uploaded to the upper monitoring system in real time. When an unauthorized person opens the front door 2, the pressure column 22 disengages from the limit switch button 41, the status of the limit switch 4 changes, and an alarm record is triggered and uploaded. This achieves real-time monitoring and accountability for opening incidents, solving the problems of poor safety and unclear responsibility for misoperation in traditional controllers.

[0038] In a preferred embodiment of this utility model, the internal communication module mounting structure of the controller is further described in detail.

[0039] like Figure 5 As shown, a wireless communication module rail 19 is welded to the inner bottom surface of the base 1, and the extension direction of the wireless communication module rail 19 faces the front door 2. The wireless communication module 5 is slidably mounted on the wireless communication module rail 19 and is fastened to the wireless communication module rail 19 by the E-UK terminal fastener 6.

[0040] This invention directly welds the wireless communication module rail 19 to the inside of the base 1. Compared to the traditional installation method using nuts, this eliminates the need for additional rail installation steps, simplifies the assembly process, and provides more space for internal wiring. Furthermore, the controller's depth is primarily determined by the length of the wireless communication module rail 19. With the welded installation, the wireless communication module rail 19 can extend to the bottom limit of the enclosure, effectively reducing the enclosure's depth. Combined with the miniaturized design of the internal circuit board, the overall length, width, and height of the controller are significantly reduced, completely solving the problem of excessively large traditional controllers.

[0041] In a preferred embodiment of this utility model, the internal structure of the controller core unit is further described in detail.

[0042] like Figure 6 and Figure 7 As shown, the controller core unit 3 includes a film 32, a unit cover 33, a circuit board 34, and a unit base 35. The circuit board 34 is mounted on the unit base 35 with screws, the unit cover 33 is mounted on the unit base 35 with nuts, and the film 32 is adhered to the outer surface of the unit cover 33.

[0043] A terminal block 343 is soldered onto the circuit board 34, and a wiring terminal 31 is mounted on the terminal block 343, with the wiring terminal 31 exposed. This design allows external cables to be directly crimped to the wiring terminal 31 without disassembling the housing of the controller core unit 3, significantly reducing wiring and disassembly time.

[0044] An SMA antenna mount 341 is also soldered onto the circuit board 34. The SMA antenna mount 341 faces the same direction as the front door 2 and protrudes from the film 32 at a certain height. The specific height can be determined according to the actual production size requirements. It is used for direct connection with an external antenna plug. This design optimizes the antenna plugging assembly process, allowing operators to directly perform plugging operations from the front.

[0045] Furthermore, a maintenance socket 342 is soldered onto the circuit board 34. The maintenance socket 342 is located near the unit cover 33 and at the upper left corner of the circuit board 34. Correspondingly, the unit cover 33 has a plug hole 331 corresponding to the position of the maintenance socket 342. When the controller needs to be upgraded or maintained, the operator only needs to lift a small portion of the film 32 at the corresponding position on the unit cover 33 to insert the upgrade plug through the plug hole 331. After the upgrade is completed, the film 32 is then reattached. This non-disassembly upgrade design greatly saves disassembly and maintenance time and reduces maintenance costs without affecting the overall appearance and sealing of the controller core unit 3.

[0046] Working principle and beneficial effects of an automatic reactive power compensation controller for high-voltage lines: The high-voltage line reactive power automatic compensation controller provided by this utility model is fixed to the pole support by the lug 12 in practical applications, and the external cable is fastened by the plastic cable fixing seat 13. The communication antenna is connected to the SMA antenna seat 341. During operation, the fully sealed design of the hollow cavity structure effectively isolates external moisture, prevents condensation, and ensures the dryness and safety of the internal electronic components; the limit switch 4 monitors the access control status in real time, improving the safety of the equipment; the welded guide rail design and modular core unit design realize the miniaturization and convenient maintenance of the equipment.

[0047] In summary, this utility model has made a systematic and innovative design to address the shortcomings of existing reactive power compensation devices, such as large controller size, poor sealing, low protection level, poor insulation, lack of condensation prevention, absence of a handle, and low safety. It achieves multiple beneficial effects, including good sealing, miniaturization, anti-disassembly, anti-condensation, easy installation, beautiful appearance, convenient wiring, easy maintenance, high safety, full functionality, simple operation, high insulation, and high protection level, and has extremely high engineering application value.

[0048] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-voltage line reactive power automatic compensation controller, comprising a base (1), a front door (2), and a controller core unit (3), wherein the front door (2) is installed on the inlet side of the base (1), and the two together form a hollow cavity structure, characterized in that: The six sides of the hollow cavity structure formed by the base (1) and the front door (2) are all sealed structures, and there are no air inlets on the surface; the inner wall of the front door (2) is adhered with a sealing gasket (21), and the inlet edge of the base (1) is provided with a flange (17). When the front door (2) is closed, the sealing gasket (21) and the flange (17) fit tightly together. A limit switch (4) is installed inside the base (1), and a pressure column (22) is provided on the inside of the front door (2). When the front door (2) is closed, the pressure column (22) is aligned with the limit switch button (41) of the limit switch (4) and triggers the limit switch (4). The hollow cavity structure houses the controller core unit (3), which includes a unit base (35), a circuit board (34), a unit cover (33), and a film (32). The circuit board (34) is mounted on the unit base (35), the unit cover (33) is mounted on the unit base (35) and covers the circuit board (34), and the film (32) is adhered to the outer surface of the unit cover (33).

2. The high-voltage line reactive power automatic compensation controller according to claim 1, characterized in that: A terminal block (343) is soldered on the circuit board (34), and a wiring terminal (31) is installed on the terminal block (343), and the wiring terminal (31) is exposed.

3. The high-voltage line reactive power automatic compensation controller according to claim 2, characterized in that: An SMA antenna mount (341) is also soldered onto the circuit board (34). The orientation of the SMA antenna mount (341) is consistent with the direction of the front door (2), and one end of the SMA antenna mount (341) exposes the film (32). A maintenance socket (342) is also soldered onto the circuit board (34). The maintenance socket (342) is located near the unit cover (33). The unit cover (33) has a plug hole (331) corresponding to the position of the maintenance socket (342).

4. A high-voltage line reactive power automatic compensation controller according to claim 1, characterized in that: It also includes a wireless communication module (5) and an E-UK terminal fastener (6); the bottom surface of the base (1) is welded with a wireless communication module rail (19), the extension direction of the wireless communication module rail (19) is towards the front door (2), the wireless communication module (5) is slidably mounted on the wireless communication module rail (19) and fastened by the E-UK terminal fastener (6).

5. A high-voltage line reactive power automatic compensation controller according to claim 1, characterized in that: The bottom surface of the base (1) is provided with a suction cup antenna (16) and a plastic cable fixing seat (13). The suction cup antenna (16) is pressed by the antenna seat (14) and locked by the flange face with a hexagonal nut (15).

6. A high-voltage line reactive power automatic compensation controller according to claim 1, characterized in that: Two hanging ears (12) and a handle (11) are welded to the top surface of the base (1).

7. A high-voltage line reactive power automatic compensation controller according to claim 1, characterized in that: The inner wall of the base (1) is welded with a limit switch fixing seat (18), and the limit switch (4) is installed on the limit switch fixing seat (18); the pressure column (22) is pressed and riveted to the inside of the front door (2).

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