Intelligent high-voltage switch cabinet

Abstract

The utility model relates to power system transmission and distribution equipment technical field, concretely relates to a kind of intelligent high-voltage switch cabinet, including cabinet, switch device, controller, circuit breaker executor, wireless transmission module and warning assembly.Perpendicular metal partition is set in cabinet, and the space in cabinet is divided into strong electric cabin and weak electric cabin, switch device and circuit breaker executor are installed in strong electric cabin, and anti-interference shield box is set in weak electric cabin.Anti-interference shield box is fixed in weak electric cabin by insulating support column, its outer wall is equipped with grounding terminal, and controller, wireless transmission module, warning assembly and sub shield room are installed inside, and controller is installed in sub shield room.Wire hole is opened in the position of metal partition corresponding anti-interference shield box, anti-electromagnetic leakage wire seat is fixed in wire hole, and connecting cable between switch device and controller passes through the wire seat.The scheme can reduce signal distortion rate and fault false alarm rate, avoid circuit breaker executor misoperation, and improve equipment operation reliability.

Description

Technical Field

[0001] This utility model relates to the field of power system transmission and distribution equipment technology, specifically to an intelligent high-voltage switchgear. Background Technology

[0002] In the power transmission and distribution process of a power system, high-voltage switchgear, as the core control equipment, needs to integrate two types of key components: one type is the high-voltage components that realize circuit on / off control, including switching equipment for main circuit switching and circuit breaker actuators for cutting off the circuit in case of fault; the other type is the low-voltage modules that realize status monitoring and signal interaction, including controllers that monitor equipment operating parameters in real time, wireless transmission modules that remotely transmit fault information, and warning components that locally indicate abnormalities.

[0003] Currently, most traditional high-voltage switchgear adopts an integrated cavity cabinet design, with high-voltage components and low-voltage modules directly installed in the same space, without specific structural optimization to address electromagnetic interference (EMI) issues. Because high-voltage components such as switchgear generate high-frequency, strong-radiation electromagnetic fields during operation, these fields can easily propagate through the air or couple along cables to adjacent low-voltage modules, leading to signal transmission distortion (such as deviations in status monitoring data), data misjudgment (such as false or missed fault alarms), and packet loss in wireless communication. More seriously, if EMI causes circuit breaker actuators to receive incorrect control signals, or if the controller fails to identify the actual fault in a timely manner, it may trigger abnormal circuit operation or even equipment burnout, posing a significant threat to the safe and stable transmission of power systems.

[0004] In the existing technology, although some switchgear has attempted to simply separate components by adding metal baffles or adding simple shielding shells to the low-voltage modules, none of these have formed a complete anti-interference system. They cannot fundamentally solve the problem of interference from strong electric radiation to the low-voltage modules and are difficult to meet the power system's requirements for the long-term stable operation of high-voltage switchgear. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model aims to provide an intelligent high-voltage switchgear that can effectively isolate high-voltage components from low-voltage modules, thereby improving the signal stability of low-voltage modules and the overall operational reliability of the equipment.

[0006] To solve the above problems, the technical solution provided by this utility model is: an intelligent high-voltage switchgear, including a cabinet, switching equipment, controller, circuit breaker actuator, wireless transmission module and warning components; The cabinet is vertically equipped with a metal partition, which divides the internal space of the cabinet into independent high-voltage compartments and low-voltage compartments. Both the switchgear and the circuit breaker are installed in the high-voltage compartment, and the circuit breaker is electrically connected to the switchgear to receive controller commands and control the switching on and off of the switchgear. The weak current compartment is equipped with an anti-interference shielding box, which is fixed inside the weak current compartment by an insulating support column, and the outer wall of the anti-interference shielding box is equipped with a grounding terminal for connecting the cabinet grounding electrode. The controller, wireless transmission module, and warning component are all fixed in an anti-interference shielding box. The controller is electrically connected to the switchgear, circuit breaker actuator, wireless transmission module, and warning component. The controller is used to collect the operating parameters of the switchgear, and when a fault is detected in the switchgear, it controls the circuit breaker actuator to disconnect the switchgear, controls the wireless transmission module to send fault information to the remote monitoring terminal, and controls the warning component to provide on-site warnings. A wire-passing hole is provided on the metal partition corresponding to the position of the anti-interference shielding box. An anti-electromagnetic leakage wire-passing base is fixed in the wire-passing hole, and the connecting cable between the switch and the controller passes through the anti-electromagnetic leakage wire-passing base.

[0007] The principle of this solution is as follows: A metal partition divides the cabinet into a high-voltage compartment and a low-voltage compartment, achieving physical isolation between high-voltage components (switching equipment, circuit breaker actuators) and low-voltage modules (controllers, wireless transmission modules, and warning components), thus blocking the direct propagation of high-voltage electromagnetic fields in space. An anti-interference shielding box within the low-voltage compartment forms a closed shield for the low-voltage modules. Combined with a grounding terminal, the electromagnetic interference absorbed by the shielding box is released through a grounding loop, preventing interference from accumulating inside the box. An anti-electromagnetic leakage cable tray seals the gaps in the metal partition's cable holes, preventing electromagnetic fields from the high-voltage compartment from intruding into the low-voltage compartment along cable gaps, while simultaneously ensuring a stable signal transmission path between the switching equipment and the controller. The controller, as the core control unit, collects the operating parameters of the switching equipment in real time and simultaneously triggers the circuit breaker actuator (cutting off the circuit), the wireless transmission module (remote alarm), and the warning components (on-site warning) in case of a fault, forming a complete intelligent fault handling chain.

[0008] The beneficial effects of this solution are as follows: Through a three-layer anti-interference design consisting of physical isolation, a shielding box, and an anti-electromagnetic leakage wiring socket, it effectively blocks the interference of strong electromagnetic fields on weak current modules, reduces the signal transmission distortion rate of weak current modules, and thus reduces the false alarm rate. The circuit breaker receives control signals sent by the controller to control the switching equipment's on / off state. This structure effectively avoids malfunctions caused by electromagnetic interference, ensuring timely disconnection of faulty circuits, reducing the risk of equipment burnout, and improving the operational reliability of the high-voltage switchgear. Fault information is sent to the remote monitoring terminal via a wireless transmission module, and on-site fault prompts are provided through warning components. Staff can remotely monitor the equipment status in real time, and on-site personnel can handle faults promptly, improving maintenance efficiency.

[0009] Furthermore, the anti-interference shielding box includes a box body and a detachably connected cover. A conductive elastic sealing ring is embedded between the mating surfaces of the box body and the cover. The box body and the cover are fastened together by metal bolts, with the ends of the metal bolts making conductive contact with the surface of the box body. By filling the mating gap between the box body and the cover with the conductive elastic sealing ring, electromagnetic fields are prevented from intruding through the gap. The conductive contact design of the metal bolts makes the shielding box form a complete conductor, further improving the shielding effectiveness.

[0010] Furthermore, the conductive elastic sealing ring is a structure consisting of a silicone rubber matrix wrapped with a nickel-plated copper wire braided layer, and the cross-sectional shape of the conductive elastic sealing ring is circular or rectangular. The silicone rubber matrix ensures the elastic sealing performance of the sealing ring, while the nickel-plated copper wire braided layer ensures conductive continuity, adapting to the mating gaps of shielding boxes of different sizes, thus balancing sealing and anti-interference effects.

[0011] Furthermore, the anti-interference shielding box includes a sub-shielding chamber, which is fixed inside the box body by an insulating bracket, and a heat dissipation gap is left between the sub-shielding chamber and the inner wall of the box body. The side wall of the sub-shielding chamber has perforated heat dissipation holes, and the controller is installed inside the sub-shielding chamber. The sub-shielding chamber provides secondary shielding for the core controller, and the heat dissipation gap, in conjunction with the perforated heat dissipation holes, prevents overheating of the low-voltage module due to the enclosed environment, thus balancing anti-interference and heat dissipation requirements.

[0012] Furthermore, the electromagnetic leakage prevention cable holder includes a metal base fixedly connected to a metal partition, and an insulating sleeve extending through the metal base; the connecting cable passes through the insulating sleeve, and the gap between the insulating sleeve and the connecting cable is filled with conductive adhesive. The metal base and the metal partition are electrically connected, forming an electromagnetic field reflection barrier, and the conductive adhesive seals the gap between the insulating sleeve and the cable, completely blocking the coupling propagation of the electromagnetic field along the cable.

[0013] Furthermore, the anti-interference shielding box is made of permalloy sheet metal through stamping, and the inner wall of the anti-interference shielding box is coated with a nano-conductive coating. Permalloy has high magnetic permeability, which can efficiently absorb low-frequency electromagnetic fields, and the nano-conductive coating enhances the box's ability to reflect high-frequency electromagnetic fields, thus achieving full-band electromagnetic shielding.

[0014] Furthermore, the warning component includes a buzzer and an LED warning light, with the light-emitting end of the LED warning light extending to the outside of the anti-interference shielding box; the antenna of the wireless transmission module extends to the outside of the box through a pre-drilled hole in the anti-interference shielding box. This design avoids the shielding box blocking the light from the LED warning light and the signal from the wireless transmission module, ensuring both on-site warning visibility and long-distance signal transmission. Attached Figure Description

[0015] Figure 1 This is a schematic diagram showing the distribution of an embodiment of an intelligent high-voltage switchgear according to the present invention.

[0016] The reference numerals in the accompanying drawings of the instruction manual include: cabinet 1, high voltage compartment 2, low voltage compartment 3, switchgear 4, circuit breaker 5, anti-interference shielding box 6, controller 61, wireless transmission module 62, warning component 63, buzzer 631, and LED warning light 632. Detailed Implementation

[0017] The following detailed description illustrates the specific implementation method: The basic implementation examples are as follows: Figure 1 As shown, an intelligent high-voltage switchgear includes a cabinet 1, a switchgear 4, a controller 61, a circuit breaker 5, a wireless transmission module 62, and an alarm component 63. The cabinet 1 is vertically equipped with a metal partition, which divides the internal space of the cabinet 1 into two independent high-voltage compartment 2 and low-voltage compartment 3. Both the switchgear 4 and the circuit breaker 5 are installed in the high-voltage compartment 2, and the circuit breaker 5 is electrically connected to the switchgear 4 to receive commands from the controller 61 and control the switching on and off of the switchgear 4. The weak current compartment 3 is equipped with an anti-interference shielding box 6. The anti-interference shielding box 6 is fixed in the weak current compartment 3 by an insulating support column, and the outer wall of the anti-interference shielding box 6 is provided with a grounding terminal for connecting the grounding electrode of the cabinet 1. The controller 61, wireless transmission module 62, and warning component 63 are all fixed inside the anti-interference shielding box 6. The controller 61 is electrically connected to the switchgear 4, the circuit breaker 5, the wireless transmission module 62, and the warning component 63. The controller 61 is used to collect the operating parameters of the switchgear 4, and when a fault is detected in the switchgear 4, it controls the circuit breaker 5 to disconnect the switchgear 4, and at the same time controls the wireless transmission module 62 to send fault information to the remote monitoring terminal, and controls the warning component 63 to provide on-site warning. A wire-passing hole is provided on the metal partition corresponding to the anti-interference shielding box 6. An anti-electromagnetic leakage wire-passing base is fixed in the wire-passing hole, and the connecting cable between the switch device 4 and the controller 61 passes through the anti-electromagnetic leakage wire-passing base.

[0018] In this embodiment, the cabinet 1 is a rectangular metal frame with a metal partition vertically fixed inside. This partition divides the interior of the cabinet 1 into two independent compartments: a high-voltage compartment 2 and a low-voltage compartment 3. The high-voltage compartment 2 is larger than the low-voltage compartment 3. The high-voltage compartment 2 is used to install high-voltage operation-related switching equipment 4 and circuit breaker actuators 5. The low-voltage compartment 3 is used to install electromagnetically sensitive controllers 61, wireless transmission modules 62, and warning components 63. Physical isolation reduces interference from high-voltage components to the low-voltage modules.

[0019] Both the switchgear 4 and the circuit breaker 5 are located within the high-voltage compartment 2. The circuit breaker 5 receives electrical signals from the controller 61 and cuts off the power supply circuit of the switchgear 4 when it malfunctions, achieving rapid isolation of the faulty circuit. The low-voltage compartment 3 is equipped with an anti-interference shielding box 6, which is fixed within the low-voltage compartment 3 by insulating support columns made of insulating material to prevent electromagnetic interference conducted through the metal partition from being directly transmitted to the anti-interference shielding box 6. The outer wall of the anti-interference shielding box 6 is equipped with a grounding terminal, which is connected to the grounding electrode of the cabinet 1 via a grounding wire. This allows the electromagnetic interference absorbed by the shielding box to be released to the ground through the grounding loop, preventing interference from accumulating inside the box.

[0020] The anti-interference shielding box 6 includes a box body and a detachably connected cover. A conductive elastic sealing ring is embedded between the mating surfaces of the box body and the cover, and is fastened by metal bolts. The ends of the bolts are in conductive contact with the surface of the box body, ensuring the sealing and conductive continuity of the shielding box. The conductive elastic sealing ring is a structure in which a silicone rubber matrix is ​​wrapped with a nickel-plated copper wire braided layer, and the cross-sectional shape of the conductive elastic sealing ring is circular or rectangular. The silicone rubber matrix ensures the elastic sealing performance of the sealing ring, while the nickel-plated copper wire braided layer ensures conductive continuity, adapting to the mating gap of shielding boxes of different sizes, and balancing sealing and anti-interference effects. The anti-interference shielding box 6 is made of permalloy sheet metal by stamping, and the inner wall is coated with a nano-conductive coating to improve the shielding effect against high and low frequency electromagnetic fields.

[0021] The anti-interference shielding box 6 contains a controller 61, a wireless transmission module 62, and an alarm component 63. The controller 61 is electrically connected to the switchgear 4, the circuit breaker actuator 5, the wireless transmission module 62, and the alarm component 63. The controller 61 is an STM32F103C8T6 microcontroller used to collect operating parameters such as voltage, current, and temperature of the switchgear 4 and determine whether the equipment is faulty based on the parameters. The wireless transmission module 62 is used to remotely send fault information to the monitoring client. The alarm component 63 is used to issue on-site warnings when a fault occurs.

[0022] The anti-interference shielding box 6 also has a sub-shielding chamber. The sub-shielding chamber is fixed inside the anti-interference shielding box 6 by an insulating bracket. The controller 61 is installed in the sub-shielding chamber. There is a heat dissipation gap between the sub-shielding chamber and the inner wall of the anti-interference shielding box 6. The side wall of the sub-shielding chamber is provided with hollow heat dissipation holes, which not only provides secondary anti-interference protection for the controller 61, but also prevents the controller 61 from overheating due to the closed environment, thus ensuring its stable operation.

[0023] A wire-passing hole is provided on the metal partition corresponding to the anti-interference shielding box 6, and an anti-electromagnetic leakage wire-passing base is fixed in the wire-passing hole. The connecting cable between the switchgear 4 and the controller 61 passes through the anti-electromagnetic leakage wire-passing base. The wire-passing base includes a metal base fixed to the metal partition and an insulating sleeve that passes through the base. The gap between the insulating sleeve and the connecting cable is filled with conductive glue, which can seal the gap at the wire-passing hole and prevent electromagnetic radiation in the high-voltage compartment 2 from entering the low-voltage compartment 3 through the hole, ensuring that the signal transmission of the connecting cable is not interfered with.

[0024] The warning component 63 includes a buzzer 631 and an LED warning light 632. The light-emitting end of the LED warning light 632 extends to the outside of the anti-interference shielding box 6. The antenna of the wireless transmission module 62 extends to the outside of the box through the reserved hole of the anti-interference shielding box 6 to avoid the shielding box blocking the signal and light.

[0025] The specific operation process of this embodiment is as follows: The controller 61 monitors the operating status of the switchgear 4 in real time. When the switchgear 4 is operating normally, the controller 61 continuously collects its operating parameters and uploads the parameters to the remote monitoring terminal through the wireless transmission module 62, so that the staff can keep track of the equipment status in real time. When a fault is detected in the switchgear 4 (such as overcurrent, overheating, short circuit, etc.), the controller 61 immediately generates a fault signal: on the one hand, the control signal is transmitted to the circuit breaker actuator 5. After receiving the signal, the circuit breaker actuator 5 performs a circuit breaker operation on the switchgear 4 to cut off the faulty circuit. On the other hand, the fault signal is simultaneously transmitted to the wireless transmission module 62 and the warning component 63. The wireless transmission module 62 sends the fault information to the monitoring client, and the warning component 63 activates the alarm (the buzzer 631 sounds an alarm and the LED warning light 632 flashes) so that the staff can be aware of and deal with the fault in a timely manner.

[0026] Throughout the operation, the metal partition physically isolates the high-voltage compartment 2 from the low-voltage compartment 3. The anti-interference shielding box 6 and the sub-shielding chamber provide double shielding for the low-voltage module. The anti-electromagnetic leakage wiring seat seals the gaps, effectively preventing electromagnetic radiation from the high-voltage components from interfering with the signal transmission and data processing of the low-voltage module, ensuring that the fault detection, judgment and execution process is accurate and timely.

[0027] The above are merely embodiments of this utility model. This utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are able to access all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims. The specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. An intelligent high-voltage switchgear, comprising a cabinet, switchgear, controller, circuit breaker actuator, wireless transmission module, and warning components, characterized in that: The cabinet is vertically equipped with a metal partition, which divides the internal space of the cabinet into independent high-voltage compartments and low-voltage compartments. Both the switchgear and the circuit breaker are installed in the high-voltage compartment, and the circuit breaker is electrically connected to the switchgear to receive controller commands and control the switching on and off of the switchgear. The weak current compartment is equipped with an anti-interference shielding box, which is fixed inside the weak current compartment by an insulating support column, and the outer wall of the anti-interference shielding box is equipped with a grounding terminal for connecting the cabinet grounding electrode. The controller, wireless transmission module, and warning component are all fixed inside an anti-interference shielding box. The controller is electrically connected to the switchgear, circuit breaker actuator, wireless transmission module, and warning component. The controller is used to collect the operating parameters of the switchgear and, when a fault is detected in the switchgear, controls the circuit breaker actuator to disconnect the switchgear, simultaneously controls the wireless transmission module to send fault information to the remote monitoring terminal, and controls the warning component to issue on-site warnings. The antenna of the wireless transmission module extends to the outside of the box through a reserved hole. A wire-passing hole is provided on the metal partition corresponding to the position of the anti-interference shielding box. An anti-electromagnetic leakage wire-passing base is fixed in the wire-passing hole, and the connecting cable between the switch and the controller passes through the anti-electromagnetic leakage wire-passing base.

2. The intelligent high-voltage switchgear according to claim 1, characterized in that: The anti-interference shielding box includes a box body and a detachably connected box cover. A conductive elastic sealing ring is embedded between the mating surfaces of the box body and the box cover. The box body and the box cover are fastened together by metal bolts, and the ends of the metal bolts are in conductive contact with the surface of the box body.

3. The intelligent high-voltage switchgear according to claim 2, characterized in that: The conductive elastic sealing ring is a structure in which a silicone rubber matrix is ​​wrapped with a nickel-plated copper wire braided layer, and the cross-sectional shape of the conductive elastic sealing ring is circular or rectangular.

4. The intelligent high-voltage switchgear according to claim 1, characterized in that: The anti-interference shielding box has a sub-shielding chamber inside, which is fixed inside the box by an insulating bracket, and a heat dissipation gap is left between the sub-shielding chamber and the inner wall of the box; the side wall of the sub-shielding chamber has hollow heat dissipation holes, and the controller is installed inside the sub-shielding chamber.

5. The intelligent high-voltage switchgear according to claim 1, characterized in that: The electromagnetic leakage prevention cable holder includes a metal base fixedly connected to a metal partition, and an insulating sleeve that penetrates the metal base; the connecting cable is inserted into the insulating sleeve, and the gap between the insulating sleeve and the connecting cable is filled with conductive adhesive.

6. The intelligent high-voltage switchgear according to claim 1, characterized in that: The anti-interference shielding box is made of permalloy sheet metal and stamped, and the inner wall of the anti-interference shielding box is coated with a nano-conductive coating.

7. The intelligent high-voltage switchgear according to claim 1, characterized in that: The warning assembly includes a buzzer and an LED warning light, with the light-emitting end of the LED warning light extending to the outside of the anti-interference shielding box.

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