Digitized normal pressure sealed air insulation switch cabinet

Abstract

The utility model relates to power system technical field, concretely relates to a kind of digital normal pressure sealed air insulation switch cabinet, including cabinet and its inside switch room, cable room and monitoring room.Switch room is equipped with switch device and busbar, and cable room is equipped with cable.The core is a set of digital monitoring system, by the multi-parameter monitoring sensor group distributed in switch room and cable room, and the monitoring device integrated in monitoring room constitute.The monitoring device includes data processor and display.Sensor group real-time acquisition mechanical, heat, insulation, environment and other multidimensional operating state data, transmission to data processor, and the state information after processing is finally displayed locally by display.This scheme constructs integrated hardware monitoring system, realizes the acquisition and display of multidimensional operating state information of switch cabinet, significantly improves the comprehensiveness, reliability and operation efficiency of state perception.

Description

Technical Field

[0001] This utility model relates to the field of power system technology, and in particular to a digital atmospheric pressure sealed air-insulated switchgear. Background Technology

[0002] Switchgear is a key piece of equipment in power transmission and distribution systems for the switching, control, and protection of electrical energy. Existing atmospheric pressure sealed air-insulated switchgear typically consists of a busbar compartment, circuit breaker compartment, cable compartment, and low-voltage control compartment. It achieves circuit switching and protection functions through internal circuit breakers, instrument transformers, and operating mechanisms, and relies on instruments and relay protection devices to complete basic electrical parameter measurements and status monitoring. While this type of equipment is technologically mature and widely used, its functions are mainly concentrated on monitoring basic electrical parameters and protecting against faults by tripping circuits. It lacks systematic monitoring methods for mechanical characteristics, thermal characteristics, and insulation status that can predict potential faults, resulting in a long-term passive operation and maintenance model of "periodic maintenance" and "emergency repairs."

[0003] Although some equipment has attempted to be equipped with online monitoring units offering single functions such as temperature or partial discharge monitoring, most suffer from isolated monitoring points, unintegrated data, and unsystematic analysis, failing to establish an effective condition assessment and early warning mechanism. Information presentation is also fragmented, lacking intuitive digital and graphical integrated displays, hindering maintenance personnel from comprehensively understanding equipment health status. Therefore, existing switchgear struggles to provide early warnings and predictive maintenance for faults, and cannot prevent power outages and equipment damage caused by sudden failures, exhibiting significant shortcomings in terms of intelligence and operational efficiency. Summary of the Invention

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a digital atmospheric pressure sealed air-insulated switch cabinet.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A digital, atmospheric pressure, sealed, air-insulated switchgear includes a cabinet and switchgear, busbars, cables, and a digital monitoring system mounted on the cabinet. The cabinet contains a monitoring room, a switchgear room, and a cable room. The switchgear and busbars are located in the switchgear room, and the cables are located in both the switchgear room and the cable room. The digital monitoring system includes a monitoring device and a multi-parameter monitoring sensor group. The monitoring device, located in the monitoring room, includes a data processor and a display. The multi-parameter monitoring sensor group includes several types of sensors, distributed throughout the switchgear room and the cable room, used to monitor the operating status of the switchgear. The outputs of the sensors are connected to the input of the data processor, and the output of the data processor is connected to the display.

[0007] This utility model's switchgear solution is based on multi-parameter fusion sensing and centralized intelligent processing. It uses a distributed array of multi-parameter monitoring sensors located in the switchgear room and cable room to collect key data on the switchgear's mechanical, thermal, insulation, and environmental operating status in real time. This data is then transmitted to a data processor in the monitoring room, and finally, the processed status information is displayed locally on an integrated display. This technical solution, by constructing an integrated hardware monitoring system, achieves the collection and centralized display of multi-dimensional operating status information of the switchgear, improving the comprehensiveness and reliability of status perception. It provides maintenance personnel with an intuitive, localized information interaction interface and provides the hardware foundation for switchgear status monitoring.

[0008] It should be noted that in this utility model, "switchgear" is a general term referring to all electrical devices in a power system that perform circuit closing, opening, control, and protection functions. It is the core functional component of the switchgear and includes, but is not limited to: circuit breakers (as core switching devices, capable of connecting, carrying, and disconnecting current under normal circuit conditions, and capable of carrying and disconnecting current under abnormal circuit conditions such as short circuit conditions within a specified time), disconnecting switches (used to establish a reliable disconnection point in the circuit to ensure maintenance safety, but not capable of disconnecting load current and short circuit current), load switches (capable of connecting and disconnecting rated load current, usually without the ability to disconnect short circuit current), grounding switches (used to ground lines or equipment to ensure personal safety), operating mechanisms (such as spring or electromagnetic operating mechanisms, providing mechanical power for the opening and closing of the above switches), and related insulating components and arc-extinguishing devices, etc.

[0009] Furthermore, the data processor includes a switch monitoring unit, and the multi-parameter monitoring sensor group includes a mechanical parameter sensor. The mechanical parameter sensor is located in the switch chamber and is communicatively connected to the switch monitoring unit, so that the switch monitoring unit monitors the mechanical health status of the operating mechanism of the switchgear based on the signals from the mechanical parameter sensor.

[0010] Furthermore, the mechanical parameter sensor includes one or more of a stroke sensor, a closing / opening current sensor, and an energy storage current sensor; the stroke sensor is disposed on the main shaft of the operating mechanism of the switchgear and is used to measure the motion signal waveform of the moving contact during the closing / opening operation; the closing / opening current sensor is disposed on the operating mechanism of the switchgear and is used to measure the operating current of the closing / opening coil; the energy storage current sensor is disposed on the energy storage motor circuit of the operating mechanism of the switchgear and is used to measure the operating current of the energy storage motor.

[0011] Furthermore, the monitoring device includes an analog transmission port, and the switch monitoring unit is connected to the mechanical parameter sensor through the analog transmission port.

[0012] Furthermore, the data processor includes a partial discharge monitoring unit, and the multi-parameter monitoring sensor group includes an insulation parameter sensor, which is communicatively connected to the partial discharge monitoring unit. In this solution, the insulation parameter sensor is used to detect ultra-high frequency signals generated by partial discharge. By acquiring the signals from the insulation parameter sensor, the partial discharge monitoring unit can effectively monitor early defects such as air gaps, cracks, and insulation aging inside the main insulation material of the switchgear, which helps to avoid sudden breakdown accidents caused by insulation deterioration.

[0013] Furthermore, the insulation parameter sensor is a partial discharge sensor, which includes at least one of an ultra-high frequency sensor, an ultrasonic sensor, or a transient ground voltage sensor. The ultra-high frequency sensor is installed at the basin-type insulator of the cable compartment or on the inner wall of the cabinet to couple the ultra-high frequency electromagnetic wave signal generated by partial discharge within the cabinet. The ultrasonic sensor is installed on the inner wall of the cable compartment or near the cable joint to receive the ultrasonic signal generated by partial discharge. The transient ground voltage sensor is installed on the inner wall of the cabinet or on the grounding wire of the cable compartment to detect the transient ground voltage signal generated by partial discharge.

[0014] Furthermore, the data processor includes a temperature measurement unit, and the multi-parameter monitoring sensor group includes a temperature sensor. The temperature sensor is located in the cable chamber and is communicatively connected to the temperature measurement unit. The temperature measurement unit in this solution uses signals sent by the temperature sensor to monitor and analyze the temperature trends of key components such as cable joints in the cable chamber in real time. This enables the monitoring of abnormal temperature rises caused by increased contact resistance, excessive load, or internal overheating, preventing power outages or fires due to burnt-out connection points, and ensuring power supply continuity and equipment safety.

[0015] Furthermore, the temperature sensor and the temperature measuring unit are connected via a 2.4G wireless interface.

[0016] Furthermore, the data processor includes a video monitoring unit, and the multi-parameter monitoring sensor group includes a camera. The camera is located in the switch room and is communicatively connected to the video monitoring unit for visual monitoring and image analysis of the status and erosion of the isolation / grounding switch contacts in the switch room.

[0017] Furthermore, the data processor includes an environmental parameter monitoring unit, and the multi-parameter monitoring sensor group includes environmental parameter sensors. The environmental parameter monitoring unit is communicatively connected to the environmental parameter sensors to realize real-time safety monitoring of the switchgear operating environment, effectively prevent accidents such as fires and water immersion, and provide data support for assessing the impact of environmental factors on the status of equipment inside the cabinet.

[0018] Furthermore, the environmental parameter sensor includes at least one of a smoke sensor, a water immersion sensor, and an environmental temperature and humidity sensor; the smoke sensor is configured in the monitoring room to monitor the smoke concentration in the environment; the water immersion sensor is configured on the lower side of the cable room to monitor water accumulation; and the environmental temperature and humidity sensor is configured in the cable room to monitor the ambient temperature and humidity. Attached Figure Description

[0019] Figure 1 This is the principle of this utility model. Figure 1 ;

[0020] Figure 2 This is the principle of this utility model. Figure 2 ;

[0021] Figure 3 This is the principle of this utility model. Figure 3 ;

[0022] Figure 4 This is a schematic diagram of the structure of this utility model.

[0023] Label Explanation:

[0024] Cabinet 1, Monitoring Room 2, Switch Room 3, Cable Room 4, Display 5, Travel Sensor 6, Opening and Closing Current Sensor 7, Energy Storage Current Sensor 8, Insulation Parameter Sensor 9, Temperature Sensor 10, Camera 11, Smoke Sensor 12, Water Immersion Sensor 13, Ambient Temperature and Humidity Sensor 14. Detailed Implementation

[0025] The embodiments of this utility model are described below with reference to the accompanying drawings:

[0026] See Figure 1-4 As shown, this utility model discloses a digital atmospheric pressure sealed air-insulated switchgear, including a cabinet 1 and switchgear, busbars, cables, and a digital monitoring system installed on the cabinet 1. The cabinet 1 has a monitoring room 2, a switchgear room 3, and a cable room 4. The switchgear and busbars are located in the switchgear room 3, and the cables are located in the switchgear room 3 and the cable room 4. The digital monitoring system includes a monitoring device and a multi-parameter monitoring sensor group. The monitoring device is located in the monitoring room 2 and includes a data processor and a display 5. The multi-parameter monitoring sensor group includes several types of sensors, which are distributed in the switchgear room 3 and the cable room 4 to monitor the operating status of the switchgear. The output terminals of the sensors are connected to the input terminal of the data processor, and the output terminal of the data processor is connected to the display 5.

[0027] In one embodiment, the data processor is a microcomputer system integrating a processor, memory, and input / output interfaces. It can receive analog sensor signals via a built-in or external analog-to-digital converter (ADC) interface, receive switching signals via a digital input (DI) interface, and interact with other functional units via a serial communication interface (such as RS-485 or CAN bus). Since the specific structure and application programs of the data processor can be derived from existing technologies, they will not be described in detail here.

[0028] Of course, the data processor in this embodiment, as the hardware computing core of the monitoring device, can also be composed of a microcontroller (MCU), a microprocessor (MPU), or an integrated circuit with equivalent functions, responsible for receiving, processing, and handling various types of data from the multi-parameter monitoring sensor group. The display 5 is connected to the data processor for localized display of information.

[0029] In one embodiment, the data processor includes a switch monitoring unit, and the multi-parameter monitoring sensor group includes a mechanical parameter sensor. The mechanical parameter sensor is located in the switch chamber 3 and is communicatively connected to the switch monitoring unit, so that the switch monitoring unit monitors the mechanical health status of the operating mechanism of the switch equipment based on the signals from the mechanical parameter sensor.

[0030] In one embodiment, the mechanical parameter sensor includes one or more of a stroke sensor 6, a closing current sensor 7, and an energy storage current sensor 8; the stroke sensor 6 is disposed on the main shaft of the operating mechanism of the switchgear and is used to measure the motion signal waveform of the moving contact during the closing operation; the closing current sensor 7 is disposed on the operating mechanism of the switchgear and is used to measure the operating current of the closing coil; the energy storage current sensor 8 is disposed on the energy storage motor circuit of the operating mechanism of the switchgear and is used to measure the operating current of the energy storage motor.

[0031] In one embodiment, the monitoring device includes an analog transmission port, and the switch monitoring unit is connected to the mechanical parameter sensor through the analog transmission port.

[0032] In one embodiment, the data processor includes a partial discharge monitoring unit, and the multi-parameter monitoring sensor group includes an insulation parameter sensor 9, which is communicatively connected to the partial discharge monitoring unit. In this solution, the insulation parameter sensor 9 is used to detect ultra-high frequency signals generated by partial discharge. By acquiring the signals from the insulation parameter sensor 9, the partial discharge monitoring unit can effectively monitor early defects such as air gaps, cracks, and insulation aging within the main insulation material of the switchgear, helping to avoid sudden breakdown accidents caused by insulation deterioration.

[0033] In one embodiment, the insulation parameter sensor 9 is a partial discharge sensor, which includes at least one of an ultra-high frequency (UHF) sensor, an ultrasonic sensor, or a transient ground voltage sensor. The UHF sensor is installed at the basin-type insulator of the cable compartment 4 or on the inner wall of the cabinet 1 to couple the UHF electromagnetic wave signal generated by partial discharge within the cabinet. The ultrasonic sensor is installed on the inner wall of the cable compartment 4 or near the cable joint to receive the ultrasonic signal generated by partial discharge. The transient ground voltage sensor is installed on the inner wall of the cabinet 1 or on the grounding wire of the cable compartment 4 to detect the transient ground voltage signal generated by partial discharge. The UHF sensor and the transient ground voltage sensor can be connected to the high-frequency signal acquisition port of the partial discharge monitoring unit via a coaxial cable. The ultrasonic sensor can be connected to the high-frequency signal acquisition port or the acoustic-to-electrical conversion interface of the partial discharge monitoring unit via a dedicated shielded cable to ensure the integrity and anti-interference capability of the high-frequency signal transmission.

[0034] In one embodiment, the data processor includes a temperature measurement unit, and the multi-parameter monitoring sensor group includes a temperature sensor 10. The temperature sensor 10 is located inside the cable compartment 4 and is communicatively connected to the temperature measurement unit. In this solution, the temperature measurement unit monitors the temperature of critical components such as cable joints inside the cable compartment 4 in real time using signals sent by the temperature sensor 10. This allows for the detection of abnormal temperature rises caused by increased contact resistance, excessive load, or internal overheating, preventing power outages or fires due to burnt-out connection points and ensuring power supply continuity and equipment safety.

[0035] In one embodiment, the temperature sensor 10 is connected to the temperature measuring unit via a wireless 2.4G interface.

[0036] In one embodiment, the data processor includes a video monitoring unit, and the multi-parameter monitoring sensor group includes a camera 11. The camera 11 is located inside the switch chamber 3 and is communicatively connected to the video monitoring unit for visual monitoring and image analysis of the status and erosion of the isolation / grounding switch contacts inside the switch chamber 3.

[0037] In one embodiment, the camera 11 is a digital camera that can be connected to the video monitoring unit via an Ethernet interface or a USB interface for transmitting high-definition video stream data.

[0038] In one embodiment, the data processor includes an environmental parameter monitoring unit, and the multi-parameter monitoring sensor group includes an environmental parameter sensor. The environmental parameter monitoring unit is communicatively connected to the environmental parameter sensor to realize real-time safety monitoring of the switchgear operating environment, effectively prevent accidents such as fire and water immersion, and provide data support for assessing the impact of environmental factors on the status of equipment inside the cabinet.

[0039] In one embodiment, the environmental parameter sensor includes at least one of a smoke sensor 12, a water immersion sensor 13, and an environmental temperature and humidity sensor 14; the smoke sensor 12 is disposed in the monitoring room 2 and is used to monitor the smoke concentration in the environment; the water immersion sensor 13 is disposed on the lower side of the cable room 4 and is used to monitor water accumulation; the environmental temperature and humidity sensor 14 is disposed in the cable room 4 and is used to monitor the environmental temperature and environmental humidity.

[0040] In one embodiment, the monitoring device includes a digital input (DI) interface, and the environmental parameter monitoring unit is connected to the smoke sensor 12 and the water immersion sensor 13 through the digital input (DI) interface; the smoke sensor 12 and the water immersion sensor 13 output digital signals, which are transmitted to the environmental parameter monitoring unit through the digital input (DI) interface to realize real-time monitoring of fire and water immersion alarm status.

[0041] In one embodiment, the outer wall of the monitoring room 2 is provided with mounting holes, and the switch cabinet also includes a control accessory for realizing the basic opening and closing operation and status monitoring of the switch cabinet; the control accessory is connected to the switch equipment through communication.

[0042] This utility model's switchgear solution is based on multi-parameter fusion sensing and centralized intelligent processing. It uses a distributed array of multi-parameter monitoring sensors located in the switch compartment 3 and cable compartment 4 to collect key data on the switchgear's mechanical, thermal, insulation, and environmental operating status in real time. This data is then transmitted to a data processor in the monitoring room 2, and finally, the processed status information is displayed locally on an integrated display 5. This technical solution, by constructing an integrated hardware monitoring system, achieves the collection and centralized display of multi-dimensional operating status information of the switchgear, improving the comprehensiveness and reliability of status perception. It provides maintenance personnel with an intuitive, localized information interaction interface and provides the hardware foundation for switchgear status monitoring.

[0043] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A digital atmospheric pressure sealed air-insulated switchgear, comprising a cabinet and switchgear, busbars, and cables mounted on the cabinet, characterized in that, It also includes a digital monitoring system. The cabinet contains a monitoring room, a switch room, and a cable room. The switchgear and busbars are located in the switch room, and the cables are located in both the switch room and the cable room. The digital monitoring system includes a monitoring device and a multi-parameter monitoring sensor group. The monitoring device is located in the monitoring room and includes a data processor and a display. The multi-parameter monitoring sensor group includes several types of sensors, which are distributed in the switch room and the cable room to monitor the operating status of the switchgear. The output terminals of the sensors are connected to the input terminal of the data processor, and the output terminal of the data processor is connected to the display.

2. The switchgear according to claim 1, characterized in that, The data processor includes a switch monitoring unit, and the multi-parameter monitoring sensor group includes a mechanical parameter sensor, which is located in the switch room and is communicatively connected to the switch monitoring unit.

3. The switchgear according to claim 2, characterized in that, The mechanical parameter sensor includes a stroke sensor, which is disposed on the main shaft of the operating mechanism of the switching device; And / or, the mechanical parameter sensor includes a circuit breaker current sensor, which is disposed on the operating mechanism of the switchgear; And / or, the mechanical parameter sensor includes an energy storage current sensor, which is configured on the energy storage motor circuit of the operating mechanism of the switching device.

4. The switchgear according to claim 2, characterized in that, The monitoring device includes an analog signal transmission port, and the switch monitoring unit is connected to the mechanical parameter sensor through the analog signal transmission port.

5. The switchgear according to claim 1, characterized in that, The data processor includes a partial discharge monitoring unit, and the multi-parameter monitoring sensor group includes an insulation parameter sensor, which is communicatively connected to the partial discharge monitoring unit.

6. The switchgear according to claim 1, characterized in that, The data processor includes a temperature measurement unit, and the multi-parameter monitoring sensor group includes a temperature sensor, which is located in the cable chamber and is communicatively connected to the temperature measurement unit.

7. The switch cabinet according to claim 6, characterized in that, The temperature sensor and the temperature measuring unit are connected via a 2.4G wireless interface.

8. The switchgear according to claim 1, characterized in that: The data processor includes a video monitoring unit, and the multi-parameter monitoring sensor group includes a camera. The camera is located in the switch room and is communicatively connected to the video monitoring unit.

9. The switchgear according to claim 1, characterized in that: The data processor includes an environmental parameter monitoring unit, and the multi-parameter monitoring sensor group includes environmental parameter sensors. The environmental parameter monitoring unit is communicatively connected to the environmental parameter sensors.

10. The switchgear according to claim 9, characterized in that, The environmental parameter sensor includes a smoke sensor, which is configured in the monitoring room; And / or, the environmental parameter sensor includes a water immersion sensor, which is disposed on the underside of the cable compartment; And / or, the environmental parameter sensor includes an environmental temperature and humidity sensor, which is disposed in the cable room.

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