35kV compact intelligent high-voltage switch cabinet

Abstract

The invention discloses a 35kV compact intelligent high-voltage switch cabinet, which comprises a gas box body, the gas box body is fixed on a cable chamber base, a mechanism chamber is fixed on the cable chamber base on the front side of the gas box body, a control box is fixedly arranged at the top of the mechanism chamber, and an operation panel is mounted on the front side of the mechanism chamber; the gas box body comprises a gas box body welding body, a plurality of switch bodies are arranged on a front plate in the gas box body welding body at intervals, a wire inlet sleeve is fixedly arranged at the lower end in the gas box body welding body, and the lower end of each switch body is connected with the wire inlet sleeve through a copper bar bus; the connecting positions of the two ends of all the copper bar buses are fixedly connected with voltage-sharing covers through bolts, and the installation end faces of the voltage-sharing covers are higher than the end faces of the standard parts and used for enabling electric fields to be evenly distributed.

Description

Technical Field

[0001] The invention relates to a high-voltage switch cabinet, in particular to a 35kV compact intelligent high-voltage switch cabinet. Background Art

[0002] In many application scenarios of power systems, such as offshore wind power generation, basement power distribution transformation, and outdoor existing foundation engineering project transformation, there are special requirements for high-voltage switchgear. Traditional 35kV high-voltage switchgear often has the problem of large floor space and is difficult to adapt to space-constrained environments. At the same time, the degree of intelligent control is low; the five-protection interlocking operation is complicated and prone to misoperation; the internal high-voltage devices lack effective voltage equalization design and are easily affected by high voltage, resulting in reduced equipment performance and reliability. These problems need to be solved urgently to ensure safe, efficient and reliable power supply in complex environments. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide a 35kV compact intelligent high-voltage switchgear, which optimizes the electric field distribution of internal high-voltage devices and reduces tip discharge, thereby solving the problem that internal high-voltage devices lack effective voltage equalization design and are easily affected by high voltage, resulting in reduced equipment performance and reliability.

[0004] Technical solution: A 35kV compact intelligent high-voltage switchgear of the present invention comprises a gas box body, wherein the gas box body is fixed on a cable room base, a mechanism room is fixed on the cable room base at the front side of the gas box body, a control box is fixed on the top of the mechanism room, and an operation panel is installed on the front side of the mechanism room;

[0005] The gas box body comprises a gas box body welding body, a switch body is arranged on the front plate inside the gas box body welding body, an inlet bushing is fixedly arranged at the lower end inside the gas box body welding body, and the lower end of the switch body is connected to the inlet bushing through a copper rod busbar;

[0006] The connection points at both ends of the copper rod busbar are fastened with a voltage balancing cover by bolts, and the mounting end surface of the voltage balancing cover is higher than the bolt head, so as to make the electric field evenly distributed.

[0007] Furthermore, the mechanism chamber includes an operating mechanism, an interlocking baffle, an interlocking rod, and a return spring. The operating mechanism is fixedly mounted on the outer side of the front plate of the gas box body, and the interlocking baffle is mounted on the operating surface of the operating mechanism.

[0008] The component connecting sleeve on the operating mechanism is connected to the component main shaft on the switch body, and the opening and closing actions of the switch body are realized through manual operation or electrical operation;

[0009] One end of the interlocking rod is connected to the interlocking baffle, and the other end thereof is matched with a corresponding hole position of the bottom plate of the mechanism chamber, and the operating rod passes through the reset spring.

[0010] Furthermore, when the interlocking rod moves up and down, it drives the interlocking baffle to slide up and down, thereby covering or exposing the operating hole on the operating surface of the operating mechanism.

[0011] Furthermore, when the interlocking rod is pulled downward, the interlocking baffle slides downward, thereby exposing the operating hole on the operating surface of the operating mechanism, and at this time, the return spring is in a compressed state;

[0012] When the interlocking rod moves upward, it drives the interlocking baffle to slide upward, thereby covering the operating hole on the operating surface of the operating mechanism. At this time, the reset spring is in a free state.

[0013] Furthermore, a cabinet door is provided below the operation panel, the cabinet door covers the front side of the cable chamber base and the front side of the mechanism chamber, and the cabinet door is connected and cooperated with the interlocking rod.

[0014] Furthermore, the operating mechanism is connected to the interlocking rod, and the operating mechanism is used to control the movement of the interlocking rod, thereby controlling the locking and unlocking of the cabinet door.

[0015] Furthermore, when the operating mechanism is in the closed state, the interlocking rod is in the locked position after movement and maintains the position stationary, and the cabinet door is locked; when the operating mechanism is in the grounded state, the interlocking rod is in a free state, the cabinet door is unlocked, and the cabinet door can be opened or closed.

[0016] Furthermore, a wire outlet sleeve is fixedly arranged at the upper end of the inner part of the gas box welding body.

[0017] Furthermore, the control box includes an RTU, a closing indicator of an opening button, a closing indicator of a closing button, a remote local knob switch, and an ammeter;

[0018] The RTU, the closing indicator light of the opening button, the opening indicator light of the closing button, the remote local knob switch, and the ammeter are all installed on the panel of the control box.

[0019] Furthermore, the RTU is connected to the opening button closing indication, the closing button opening indication, the remote local knob switch, and the ammeter through the secondary loop wire, and data collection, switch position status monitoring, and remote control switch opening and closing action monitoring are realized through the RTU.

[0020] Beneficial effects: Compared with the prior art, the significant technical effects of the present invention are as follows:

[0021] By setting up a pressure equalizing hood, the pressure equalizing design inside the gas box optimizes the electric field distribution, improves insulation and breaking performance, reduces overvoltage damage, ensures the reliability and stability of the power system, reduces the probability of power outages, and ensures stable electricity consumption in various fields.

[0022] The compact cabinet structure reduces floor space and is suitable for locations with limited space, such as offshore wind power, basement power distribution transformation, and equipment renovation.

[0023] Simplify the five-protection interlocking system, reduce the types of materials, simplify the operating steps, avoid on-site misoperation, and ensure personnel safety and normal operation of equipment.

[0024] Achieve fully intelligent control, improve operation and maintenance convenience and management capabilities through RTU real-time monitoring and remote switch operation.

[0025] The standard serialization scheme facilitates cabinet maintenance switching and project transformation, saving costs and improving the management environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the gas box body in the present invention;

[0028] Figure 3 It is a structural schematic diagram of the mechanism chamber in the present invention;

[0029] Figure 4 It is a structural schematic diagram of the control box in the present invention;

[0030] Figure 5 This is a schematic diagram of the structure when the present invention as a whole adopts a standardized design. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is described in detail below in conjunction with specific implementation methods and the accompanying drawings of the specification.

[0032] like Figure 1 As shown, the 35kV compact intelligent high-voltage switchgear of the present invention includes a gas box body 1, a cable room base 2, a mechanism room 3, a control box 4, an operation panel 5 and a cabinet door 6. The gas box body 1 is fixed on the cable room base 2, and the mechanism room 3 is fixed on the cable room base 2 at the front side of the gas box body 1. The control box 4 is fixed on the top of the mechanism room 3. The operation panel 5 is installed on the front side of the mechanism room 3. The mechanism room 3 is located at the front of the switchgear. A cabinet door 6 is arranged below the operation panel 5, and the cabinet door 6 covers the front side of the cable room base 2 and the front side of the mechanism room 3, and the cabinet door 6 is aligned with the operation panel 5. A wiring hole is opened on the control box 4, and the control line is connected from the control box 4 to the mechanism in the mechanism room 3 through the wiring hole.

[0033] The cabinet shell is made of high-strength metal materials with good insulation and corrosion resistance (such as high-quality cold-rolled steel plates, etc.), which are processed into a compact cabinet frame structure with uniform width and depth through bending, welding and other processes, and the installation positions of various functional components are reserved. During the assembly process, each compartment is installed and fixed according to a compact layout that complies with electrical safety regulations to ensure reliable electrical connections between components and reasonable space utilization.

[0034] The width of the gas box, cable room base, mechanism room and control box are all 500mm, and the depth is 1000mm, showing a compact design. The compact design of this size mainly depends on the size of the switch body 11. The volume of the switch body in this solution is relatively small, and the corresponding cabinet design can be controlled in a compact size. The width of the cabinets of other manufacturers is generally 600mm to 800mm. The compact design can effectively reduce the floor space and adapt to the space-constrained needs of special places. For example, the internal space of offshore wind power generation is limited, the space for basement power distribution transformation is limited, and the equipment transformation and upgrading all require compact switchgear. Compactness saves land resources and construction costs. For cities where every inch of land is valuable, its economic benefits are obvious.

[0035] like Figure 2 As shown, the gas box body 1 includes a switch body 11, a copper rod busbar 13, a voltage equalizing cover 14, an incoming line bushing 15, an outgoing line bushing 16, and an air box body welding body 17. The switch body 11 is arranged on the front plate inside the air box body welding body 17. The incoming line bushing 15 is fixedly provided at the designated hole position at the lower end of the air box body welding body 17. The outgoing line bushing 16 is fixedly provided at the designated hole positions on both sides of the upper end of the air box body welding body 17. The lower end of the switch body 11 is connected to the incoming line bushing 15 through the copper rod busbar 13. The connection at both ends of the copper rod busbar 13 is fastened with a voltage equalizing cover 14 by bolts. The installation end face of the voltage equalizing cover 14 is higher than the bolt head, so as to play a role in uniformly distributing the electric field, wherein the end face of the standard part refers to the position of the bolt head. The voltage equalizing cover 14 is installed to optimize the electric field distribution locally at the connection part, balance the voltage between the fractures, and reduce the tip discharge. By setting up the equalizing cover 14, the equalizing design of the high-voltage components inside the gas box 1 is realized. The equalizing design of the high-voltage components inside the gas box can improve the electric field distribution, improve the insulation performance, reduce the damage to the equipment caused by overvoltage, improve the breaking performance of the switchgear, ensure the reliability and stability of the system, reduce the power outage accidents caused by equipment failure, and improve the power supply reliability of the power system, which is of great significance for ensuring the stability of electricity consumption in various fields such as industrial production and residents' lives. In the present invention, the main improvements in the design of the equalizing cover 14 are as follows: 1. The rounded small R angle is made into a large R angle with a larger curvature; 2. The electrical gap from high potential to low potential is enlarged to reduce the risk of tip discharge.

[0036] After the gas box 1 is installed, the electric field distribution in the gas box 1 is tested by professional electric field simulation test equipment such as power frequency withstand voltage equipment and lightning impulse to ensure that the electric field uniformity meets the design requirements and improve the insulation and breaking performance of the equipment.

[0037] like Figure 3 As shown, the mechanism chamber 3 includes an operating mechanism 31, an interlocking baffle 32, an interlocking rod 33, and a reset spring 34. The operating mechanism 31 is fixedly mounted on the outer side of the front plate of the gas box body 1, and the interlocking baffle 32 is mounted on the operating surface of the operating mechanism 31. The component connecting sleeve on the operating mechanism 31 is connected to the component main shaft on the switch body 11, and the opening and closing actions of the switch body 11 are realized by manual operation or electrical operation. One end of the interlocking rod 33 is connected to the interlocking baffle 32, and the other end thereof is matched with the corresponding hole position of the bottom plate of the mechanism chamber 3, and the operating rod 33 passes through the reset spring 34. When the interlocking rod 33 moves up and down, it drives the interlocking baffle 32 to slide up and down, thereby covering or exposing the operating hole position on the operating surface of the operating mechanism 31; specifically, when the interlocking rod 33 is pulled downward, the interlocking baffle 32 slides downward, thereby exposing the operating hole position on the operating surface of the operating mechanism 31, and the operating mechanism 31 can be operated. At this time, the reset spring 34 is in a compressed state. When the cabinet door 6 is open, the return spring 34 is in a free state, and the interlocking rod 33 moves upward, driving the interlocking baffle 32 to slide upward to cover the operating hole on the operating surface of the operating mechanism 31, and the operating mechanism 31 is not allowed to be operated.

[0038] A cabinet door 6 is provided below the operation panel 5 , and the cabinet door 6 covers the front side of the cable chamber base 2 and the front side of the mechanism chamber 3 . The cabinet door 6 is connected and matched with the interlocking rod 33 .

[0039] The operating mechanism 31 is connected to the interlocking rod 33, and the operating mechanism 31 is used to control the up and down movement of the interlocking rod 33, and then control the locking and unlocking of the cabinet door 6. Specifically, when the operating mechanism 31 is in the closed state, the interlocking rod 33 is in the locked position after the movement, and keeps the position immobile, the cabinet door 6 is locked, and the cabinet door 6 cannot move; when the operating mechanism 31 is in the grounded state, the interlocking rod 33 is in the unlocked state and can move freely up and down within the designed stroke, the cabinet door 6 is unlocked, and the cabinet door 6 can be opened or closed. When the cabinet door 6 is opened, the interlocking rod 33 is brought to the unlocking position by the return spring 34, and when the cabinet door 6 is closed, the interlocking rod 33 is brought to the locked position.

[0040] An optimized set of five-defense interlocking devices is installed at the cabinet door 6. The device adopts a combination of mechanical and electrical methods and has the following functions: (a) The operating mechanism 31 is associated with key actions such as the opening and closing of the cabinet door 6 and the switch operation; (b) The interlocking baffle 32 realizes the shielding of the operating hole of the operating mechanism 31 by cooperating with the up and down sliding; (c) When the operating mechanism 31 is in the closed state, the cabinet door 6 is kept from opening through the cooperation of the interlocking rod 35; (d) When the operating mechanism 31 is in the grounded state, the cabinet door 6 is kept open through the cooperation of the interlocking rod 35; (e) When the cabinet door 6 is open, the operating mechanism 31 is not allowed to be operated; the interlocking function is realized according to the above 5 points to avoid the occurrence of misoperation. After the installation is completed, multiple simulated operation tests are carried out to verify the accuracy and reliability of the five-defense interlocking function.

[0041] The cabinet door 6 can be used as both the cable room cabinet door and the fuse room cabinet door. The cable room and the fuse room use the same cabinet door 6, and the interlock uses the same set of interlocks. The optimized mode of one cabinet door and one set of interlocks is adopted, and the five-protection interlock function is realized through the combination of mechanical and electrical. The interlock baffle slides up and down to block the operating hole of the operating mechanism 31; the cabinet door cannot be opened when the operating mechanism 31 is closed, and the cabinet door can be opened when the ground is closed; it is forbidden to operate the operating mechanism when the cabinet door is open to avoid misoperation.

[0042] The present invention simplifies the five-protection interlocking on the conventional switch cabinet, optimizes the original two sets of interlocking on two cabinet doors into one set of interlocking on one cabinet door, reduces the types of materials, simplifies the operation steps of the five-protection interlocking, avoids users' on-site misoperation and causes personal injury, and is safe and reliable;

[0043] like Figure 4As shown, the control box 4 includes a remote terminal unit (RTU) 41, a switch-off button closing indicator 42, a switch-off button opening indicator 43, a remote local knob switch 44, an ammeter 45, and a secondary circuit conductor 46. The remote terminal unit 41, the switch-off button closing indicator 42, the switch-off button opening indicator 43, the remote local knob switch 44, and the ammeter 45 are all installed on the panel of the control box 4. The secondary circuit conductor 46 is connected to the auxiliary contacts of each switch to achieve accurate acquisition of the switch position status; in this embodiment, the remote terminal unit 41 is connected to the switch-off button closing indicator 42, the switch-off button opening indicator 43, the remote local knob switch 44, and the ammeter 45 through the secondary circuit conductor 46, and data acquisition, switch position status monitoring, and monitoring of the switch-off and closing actions of the remote control switch are realized through the remote terminal unit 41. The RTU can be fixedly installed on the panel of the control box 4 or fixed inside the control box 4. The secondary circuit conductor 46 connects the auxiliary contacts of each switch to realize data collection and switch status monitoring, and realizes the remote control function through the RTU. The communication link between the RTU and the remote monitoring platform can be configured by wired (such as optical fiber, Ethernet, etc.) or wireless (such as 4G / 5G, etc.) communication mode, and parameter setting and debugging are performed according to the corresponding communication protocol to ensure that data can be uploaded accurately and remote control instructions can be effectively executed.

[0044] Fully intelligent control is achieved with the help of the RTU in the control box. The RTU collects the switch position status of the switch body 11, whether it is in open or closed state, and uploads it to the platform. At the same time, it receives remote control instructions to realize the opening and closing actions of the switch body 11, improves the convenience of operation and remote management capabilities, and realizes intelligent control.

[0045] The high-voltage switchgear of the present invention can be a 35kV circuit breaker switchgear, a 35kV load switchgear, a 35kV combined electrical switchgear, or other high-voltage switchgears of various schemes.

[0046] like Figure 5 As shown, the present invention makes a standardized design for the overall serialization scheme of the product. Through reasonable overall structural adjustment, unified regulations are made for the length, width and height of high-voltage switch cabinets of various schemes, and the cabinet holes from top to bottom and from front to back on the side are kept consistent, and the bottom fixing holes are kept consistent, so that cabinets in various combinations can be used, ensuring that the cabinet body is neat and beautiful, and convenient for maintenance switching and project transformation.

[0047] During actual operation, the functional modules of the 35kV compact intelligent high-voltage switchgear of the present invention work together, the compact cabinet effectively saves space, the intelligent control facilitates remote management, the simplified five-protection interlocking ensures safe operation, the equalizing pressure design in the gas box ensures stable and reliable operation of the equipment, and the cabinet series design provides strong support for the power supply of the power system in various complex environments.

Claims

1. A 35kV compact intelligent high-voltage switchgear, characterized in that: The invention comprises an air box body (1), wherein the air box body (1) is fixed on a cable room base (2), a mechanism room (3) is fixed on the cable room base (2) at the front side of the air box body (1), a control box (4) is fixed on the top of the mechanism room (3), and an operation panel (5) is installed on the front side of the mechanism room (3); The gas box body (1) comprises a gas box body welding body (17), a switch body (11) is arranged on the front plate inside the gas box body welding body (17), an inlet bushing (15) is fixedly arranged at the lower end inside the gas box body welding body (17), and the lower end of the switch body (11) is connected to the inlet bushing (15) via a copper rod busbar (13); The connection points at both ends of the copper bar busbar (13) are fastened with a voltage equalizing cover (14) by means of bolts, and the mounting end surface of the voltage equalizing cover (14) is higher than the bolt head, so as to make the electric field evenly distributed.

2. The 35kV compact intelligent high-voltage switchgear according to claim 1 is characterized in that: The mechanism chamber (3) comprises an operating mechanism (31), an interlocking baffle (32), an interlocking rod (33), and a return spring (34); the operating mechanism (31) is fixedly mounted on the outer side of the front plate of the gas box body (1); and the interlocking baffle (32) is mounted on the operating surface of the operating mechanism (31); The component connecting sleeve on the operating mechanism (31) is connected to the component main shaft on the switch body (11), and the opening and closing actions of the switch body (11) are realized through manual operation or electrical operation; One end of the interlocking rod (33) is connected to the interlocking baffle (32), and the other end thereof is matched with a corresponding hole position of the bottom plate of the mechanism chamber (3), and the operating rod (33) passes through the return spring (34).

3. The 35kV compact intelligent high-voltage switchgear according to claim 2 is characterized in that: When the interlocking rod (33) moves up and down, it drives the interlocking baffle (32) to slide up and down, thereby covering or exposing the operating hole on the operating surface of the operating mechanism (31).

4. The 35kV compact intelligent high-voltage switchgear according to claim 3 is characterized in that: When the interlocking rod (33) is pulled downward, the interlocking baffle (32) slides downward, thereby exposing the operating hole on the operating surface of the operating mechanism (31), and at this time, the return spring (34) is in a compressed state; When the interlocking rod (33) moves upward, it drives the interlocking baffle (32) to slide upward, thereby covering the operating hole on the operating surface of the operating mechanism (31). At this time, the return spring (34) is in a free state.

5. The 35kV compact intelligent high-voltage switchgear according to claim 2 is characterized in that: A cabinet door (6) is arranged below the operation panel (5), and the cabinet door (6) covers the front side of the cable chamber base (2) and the front side of the mechanism chamber (3). The cabinet door (6) is connected and matched with the interlocking rod (33), and when the cabinet door (6) is opened or closed, the interlocking rod (33) can be pulled up and down at the same time.

6. The 35kV compact intelligent high-voltage switchgear according to claim 5 is characterized in that: The operating mechanism (31) is connected to the interlocking rod (33), and the operating mechanism (31) is used to control the up and down movement of the interlocking rod (33), thereby controlling the locking and unlocking of the cabinet door (6).

7. The 35kV compact intelligent high-voltage switchgear according to claim 6 is characterized in that: When the operating mechanism (31) is in a closed state, the interlocking rod (33) is in a locked position after movement and remains in a stationary position, and the cabinet door (6) is locked; When the operating mechanism (31) is in a grounded state, the interlocking rod (33) is in a free state, the cabinet door (6) is unlocked, and the cabinet door (6) can be opened or closed.

8. The 35kV compact intelligent high-voltage switchgear according to claim 1 is characterized in that: An outlet sleeve (16) is fixedly arranged at the upper end of the interior of the gas box welding body (17).

9. The 35kV compact intelligent high-voltage switchgear according to claim 1 is characterized in that: The control box (4) comprises an RTU (41), an opening button closing indicator (42), a closing button opening indicator (43), a remote local knob switch (44), and an ammeter (45); The RTU (41), the opening button closing indicator light (42), the closing button opening indicator light (43), the remote local knob switch (44), and the ammeter (45) are all installed on the panel of the control box (4).

10. The 35kV compact intelligent high-voltage switchgear according to claim 9 is characterized in that: The RTU (41) is respectively connected to the opening button closing indication (42), the closing button opening indication (43), the remote local knob switch (44), and the ammeter (45) through the secondary circuit conductor (46), and data collection, switch position status monitoring, and monitoring of the opening and closing actions of the remote control switch are realized through the RTU (41).

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