An intelligent monitoring system for switchgear

Abstract

The utility model discloses a switchgear intelligent monitoring system relates to electric power system field. Including condition monitoring module, data processing module, data transmission module and remote monitoring center, the condition monitoring module is connected with switchgear, and the operating condition data at least includes temperature data and current data, data processing module is connected with condition monitoring module, data transmission module communication respectively, and the operating condition data is stored and is preprocessed, and is transmitted to remote monitoring center through data transmission module, data transmission module includes local bus unit and wireless transmission unit, and local bus unit is used for realizing the communication connection between condition monitoring module and data processing module, and remote monitoring center is used for receiving and analyzing operating condition data, generates control instruction and is fed back to data processing module through data transmission module. The utility model improves the intelligentization and high efficiency of switchgear management.

Description

Technical Field

[0001] This utility model relates to the field of power systems, and more specifically to an intelligent monitoring system for switchgear. Background Technology

[0002] In power system operation, switchgear, as a key piece of equipment in the transmission and distribution link, directly affects the stability and security of power supply. Among these parameters, temperature is a core indicator reflecting the health status of switchgear. Components such as contacts and busbars inside the cabinet are prone to poor contact due to long-term current load, leading to localized overheating. If not monitored and warned in time, this can cause insulation aging, equipment burnout, or even fire accidents. Currently, traditional switchgear temperature monitoring mostly relies on manual inspection. Maintenance personnel need to periodically check thermometers or use handheld devices on-site, which is not only inefficient and labor-intensive but also makes real-time dynamic monitoring difficult. Especially for switchgear in remote areas or at high voltage levels, manual inspection poses safety hazards and is prone to sudden temperature anomalies due to missed inspection intervals. While some improved solutions incorporate temperature sensors, the connection between the sensors and monitoring terminals is often wired, resulting in complex wiring that is limited by the switchgear installation environment and lacks flexibility during cabinet modifications or expansions. Furthermore, existing data communication transmission methods have limitations: either they use short-distance bus transmission, making remote data aggregation impossible, or they are susceptible to electromagnetic interference from the power system, leading to packet loss and delays. This makes it difficult for the monitoring center to obtain accurate temperature data in a timely manner and respond quickly to faults. In addition, traditional monitoring solutions have weak integration and transmission capabilities for temperature data with other operating parameters, making it difficult to form a unified monitoring data link. This further reduces the level of intelligence in switchgear operation and maintenance and fails to meet the demands of modern power systems for real-time equipment status monitoring and remote control. Therefore, there is an urgent need to propose a superior technical solution to address the issues of real-time performance in switchgear temperature monitoring and the stability and convenience of data transmission. Utility Model Content

[0003] In view of this, the present invention provides an intelligent monitoring system for switchgear to solve the problems existing in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A switchgear intelligent monitoring system includes a status monitoring module, a data processing module, a data transmission module, and a remote monitoring center; The status monitoring module is connected to the switch cabinet and is used to collect the operating status data of the switch cabinet. The operating status data includes at least temperature data and current data. The data processing module is communicatively connected to the status monitoring module and the data transmission module, respectively, and is used to receive the operation status data collected by the status monitoring module, store and preprocess the operation status data, and then transmit it to the remote monitoring center through the data transmission module. The data transmission module includes a local bus unit and a wireless transmission unit. The local bus unit is used to realize the communication connection between the status monitoring module and the data processing module, and the wireless transmission unit is used to realize the communication connection between the data processing module and the remote monitoring center. The remote monitoring center is used to receive and analyze the operating status data, generate control commands, and feed them back to the data processing module through the data transmission module.

[0005] Optionally, a protection control module is also included. The protection control module is connected to the data processing module and the switch cabinet respectively, and is used to receive control commands transmitted by the data processing module to perform cooling operation or power-off protection operation on the switch cabinet.

[0006] Optionally, the protection control module includes a cooling unit and a power-off unit. The cooling unit is connected to the inside of the switchgear or the surface of the cabinet, and is one or more of an air-cooled cooling device, a water-cooled cooling device, or a heat pipe cooling device. The air-cooled cooling device includes a fan and heat dissipation fins, the water-cooled cooling device includes a water circulation pipeline and a heat exchanger, and the heat pipe cooling device is filled with a low-boiling-point working fluid for starting and stopping according to control commands to regulate the switchgear temperature. The power-off unit is a circuit breaker or a trip coil, connected in series in the power input circuit of the switchgear, and connected to the data processing module via power line carrier communication. The power line carrier communication uses the switchgear power supply line as the transmission medium to realize bidirectional transmission of control commands. When a power-off command is received, the circuit breaker or trip coil quickly acts to disconnect the power supply from the switchgear.

[0007] Optionally, the status monitoring module includes a temperature sensing unit, a current sensing unit, and an auxiliary sensing unit. The temperature sensing unit is fitted into the contacts, busbars, and cable joints of the switchgear and uses one or more of thermocouples, resistance temperature detectors (RTDs), or thermistors to collect real-time component surface temperature data. The current sensing unit is fitted into the current loop of the switchgear and uses one or more of current sensors or Hall effect sensors to detect operating current and fault current pulse signals in the loop. The auxiliary sensing unit includes a humidity sensor and a camera. The humidity sensor is located inside the switchgear cavity to collect humidity data of the cabinet environment, and the camera is directed towards key components inside the switchgear to acquire component status image data.

[0008] Optionally, the local bus unit adopts a CEBUS bus, which is connected to the interface of each sensing unit of the status monitoring module and the data processing module, respectively, and supports power line and twisted pair transmission media. The CEBUS bus adopts one or more of the following chips: LM1893 chip, ST7536 chip, SSC-P485 chip, or CEWay-Ⅲ chip. The chip integrates physical layer signal processing functions, and some chips contain data link layer media access control sublayer and logical link control sublayer functions to realize connectionless data transmission with acknowledgment / no acknowledgment, and generate packet control fields containing data type, priority, and sequence number.

[0009] Optionally, the data processing module includes a data interface, a data processor, and a data storage device; the data interface is a multi-channel interface connected to the output of the local bus unit, and can simultaneously receive multiple types of operating status data; the data storage device is a non-volatile memory chip used to classify and store raw operating status data, preprocessed data, and historical operating records.

[0010] Optionally, a data concentrator is provided between the data processing module and the remote monitoring center; the data concentrator includes multiple input interfaces and one output interface, the input interfaces are respectively connected to the wireless transmission units of multiple data processing modules, aggregating data from multiple switch cabinets, and after being classified and cached by the built-in cache and distribution module, the data is transmitted in batches to the remote monitoring center through the output interface; at the same time, it receives remote control commands, parses the target switch cabinet address, and distributes it to the corresponding data processing module.

[0011] Optionally, it also includes a power module that supplies power to the status monitoring module, the data processing module, the data transmission module and the protection control module, and the power module includes a solar panel.

[0012] As can be seen from the above technical solution, compared with the prior art, this utility model discloses an intelligent monitoring system for switchgear. The system accurately collects key operating data such as temperature and current through a status monitoring module. After efficient storage and preprocessing by the data processing module, stable communication is achieved through a data transmission module combining local bus and wireless transmission. Finally, the remote monitoring center completes data analysis and command feedback. This system not only allows for real-time monitoring of the switchgear's operating status and timely detection of anomalies, ensuring the safe and stable operation of the equipment, but also improves the reliability and flexibility of data transmission through dual local and wireless transmission. Simultaneously, the remote monitoring function reduces the cost of manual inspections and enhances the intelligence and efficiency of switchgear management. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0014] Figure 1 This is a structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the signal processing circuit of this utility model. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model discloses an intelligent monitoring system for switchgear, such as... Figure 1 As shown, it includes a status monitoring module, a data processing module, a data transmission module, and a remote monitoring center; The status monitoring module is connected to the switch cabinet and is used to collect the operating status data of the switch cabinet. The operating status data includes at least temperature data and current data. The data processing module is communicatively connected to the status monitoring module and the data transmission module, respectively, and is used to receive the operation status data collected by the status monitoring module, store and preprocess the operation status data, and then transmit it to the remote monitoring center through the data transmission module. The data transmission module includes a local bus unit and a wireless transmission unit. The local bus unit is used to realize the communication connection between the status monitoring module and the data processing module, and the wireless transmission unit is used to realize the communication connection between the data processing module and the remote monitoring center. The remote monitoring center is used to receive and analyze the operating status data, generate control commands, and feed them back to the data processing module through the data transmission module.

[0017] Furthermore, in this embodiment, a protection control module is also included. The protection control module is connected to the data processing module and the switch cabinet respectively, and is used to receive control commands transmitted by the data processing module to perform cooling operation or power-off protection operation on the switch cabinet.

[0018] Furthermore, the protection control module includes a cooling unit and a power-off unit. The cooling unit is connected to the interior or surface of the switchgear and is one or more of an air-cooled cooling device, a water-cooled cooling device, or a heat pipe cooling device. The air-cooled cooling device includes a fan and heat dissipation fins, the water-cooled cooling device includes a water circulation pipeline and a heat exchanger, and the heat pipe cooling device is filled with a low-boiling-point working fluid for starting and stopping according to control commands to regulate the switchgear temperature. The power-off unit is a circuit breaker or a trip coil, connected in series in the power input circuit of the switchgear, and connected to the data processing module via power line carrier communication. The power line carrier communication uses the switchgear power supply line as the transmission medium to realize bidirectional transmission of control commands. When a power-off command is received, the circuit breaker or trip coil quickly acts to disconnect the power supply from the switchgear.

[0019] In this embodiment, the protection control module may further include a cooling unit, a trip control circuit, and a power-off unit. The cooling unit is connected to the inside / surface of the switchgear and is one or more of the following: air-cooled (including a fan and heat sink fins), water-cooled (including a water circulation pipeline and heat exchanger), or heat pipe (filled with a low-boiling-point working fluid). It is controlled to start and stop by the data processing module. The trip control circuit includes a protection relay, which is connected in series with the switchgear's opening / closing circuit and electrically connected to the MCU controller. In case of a fault, the MCU controller drives the relay to cut off the faulty circuit. The power-off unit is a circuit breaker or a trip coil, connected in series with the switchgear's power input circuit. It communicates with the data processing module via power line carrier communication (using the power supply line to transmit control commands) and cuts off the power supply after receiving a power-off command.

[0020] Furthermore, the status monitoring module includes a temperature sensing unit, a current sensing unit, and an auxiliary sensing unit. The temperature sensing unit is fitted into the contacts, busbars, and cable joints of the switchgear and uses one or more of thermocouples, resistance temperature detectors (RTDs), or thermistors to collect real-time surface temperature data of components. The current sensing unit is fitted into the current loop of the switchgear and uses one or more of current sensors or Hall effect sensors to detect operating current and fault current pulse signals in the loop. The auxiliary sensing unit includes a humidity sensor and a camera. The humidity sensor is located inside the switchgear cavity to collect humidity data of the environment inside the cabinet, and the camera is directed towards key components inside the switchgear to acquire image data of component status.

[0021] Furthermore, such as Figure 2As shown, the status monitoring module includes a temperature sensing unit, a current sensing unit, and an image detection unit. The temperature sensing unit is attached to easily heated components such as the contact arm and busbar connector of the switchgear circuit breaker, and includes a thermistor RT and a signal processing circuit. The signal processing circuit includes resistors R1-R8, a reference voltage source U1, a capacitor C1, and operational amplifiers A1-A2. The output terminal of the reference voltage source U1 is connected in parallel to one end of resistors R1 and R2. The other end of resistor R1 is connected in parallel to the thermistor RT and one end of resistor R3. The other end of resistor R3 is connected in parallel to one end of capacitor C1 and the negative terminal of operational amplifier A1. The other end of capacitor C1 is connected in parallel to the other end of the thermistor RT, the output terminal of operational amplifier A1, and one end of resistor R6. The other end of resistor R2... The positive terminal of operational amplifier A1 is connected to one end of resistor R4. The other end of resistor R4 is connected in series with resistor R5. The other end of resistor R6 is connected in parallel to the negative terminal of operational amplifier A2 and one end of resistor R7. The other end of resistor R7 is connected in parallel to the output terminal of operational amplifier A2 and then connected to the data processing module. The positive terminal of operational amplifier A2 is grounded through resistor R8. The current sensing unit is installed in the current loop of the switchgear and uses a current sensor or Hall element to detect operating current and fault current pulse signals. The image detection unit includes an image sensor and an image recognizer. The image sensor is installed in the switchgear facing the circuit breaker contact point and is electrically connected to the image recognizer. The output terminal of the image recognizer is connected to the data processing module to acquire and recognize discharge image information.

[0022] Furthermore, the local bus unit adopts a CEBUS bus, which connects each sensing unit of the status monitoring module to the interface of the data processing module, supporting power line and twisted pair transmission media. The CEBUS bus adopts one or more of the following chips: LM1893, ST7536, SSC-P485, or CEWay-Ⅲ. The chip integrates physical layer signal processing functions, and some chips contain data link layer media access control sublayer and logical link control sublayer functions to realize connectionless data transmission with acknowledgment / no acknowledgment, and generate packet control fields containing data type, priority, and sequence number.

[0023] Furthermore, the data processing module includes a data interface, a data processor, and a data storage device; the data interface is a multi-channel interface connected to the output of the local bus unit, and can simultaneously receive multiple types of operating status data; the data storage device is a non-volatile memory chip used to classify and store raw operating status data, preprocessed data, and historical operating records.

[0024] Furthermore, a data concentrator is provided between the data processing module and the remote monitoring center; the data concentrator includes multiple input interfaces and one output interface, the input interfaces are respectively connected to the wireless transmission units of multiple data processing modules, aggregating data from multiple switch cabinets, and after being classified and cached by the built-in cache and distribution module, it is transmitted in batches to the remote monitoring center through the output interface; at the same time, it receives remote control commands, parses the target switch cabinet address and distributes it to the corresponding data processing module.

[0025] Furthermore, it also includes a power module that supplies power to the status monitoring module, the data processing module, the data transmission module, and the protection control module. The power module includes a solar panel.

[0026] Furthermore, the data processing module includes an MCU controller, a data interface, a data storage unit, and a data conversion unit. The MCU controller uses an STM32F103C8T6 chip to receive the operating status data from the status monitoring module, perform filtering, noise reduction, and normalization preprocessing, determine whether the data exceeds thresholds (temperature exceeding 85℃, current exceeding 120% of rated value), and generate control commands. The data interface is a multi-channel interface connected to the local bus unit to synchronously receive temperature, current, and image data. The data storage unit is a non-volatile chip that categorizes and stores raw data, preprocessed data, and historical records, supporting at least 3 months of continuous storage. The data conversion unit is a serial port server that supports bidirectional conversion between RS-232 / 485 / 422 and TCP / IP protocols, converting serial port format data to Ethernet format for transmission to the wireless transmission unit, and conversely, converting Ethernet format control commands to serial port format for transmission to the MCU controller.

[0027] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A switchgear intelligent monitoring system, characterized in that, It includes a status monitoring module, a data processing module, a data transmission module, and a remote monitoring center; The status monitoring module is connected to the switch cabinet and is used to collect the operating status data of the switch cabinet. The operating status data includes at least temperature data and current data. The data processing module is communicatively connected to the status monitoring module and the data transmission module, respectively, and is used to receive the operation status data collected by the status monitoring module, store and preprocess the operation status data, and then transmit it to the remote monitoring center through the data transmission module. The data transmission module includes a local bus unit and a wireless transmission unit. The local bus unit is used to realize the communication connection between the status monitoring module and the data processing module, and the wireless transmission unit is used to realize the communication connection between the data processing module and the remote monitoring center. The remote monitoring center is used to receive and analyze the operating status data, generate control commands, and feed them back to the data processing module through the data transmission module.

2. The intelligent monitoring system for switchgear according to claim 1, characterized in that, It also includes a protection control module, which is connected to the data processing module and the switch cabinet respectively, and is used to receive control commands transmitted by the data processing module to perform cooling operation or power-off protection operation on the switch cabinet.

3. The intelligent monitoring system for switchgear according to claim 2, characterized in that, The protection and control module includes a cooling unit and a power-off unit. The cooling unit is connected to the inside of the switchgear or the surface of the cabinet and is one or more of the following: air-cooled cooling equipment, water-cooled cooling equipment, or heat pipe cooling equipment. The air-cooled cooling equipment includes a fan and heat dissipation fins, the water-cooled cooling equipment includes a water circulation pipeline and a heat exchanger, and the heat pipe cooling equipment is filled with a low-boiling-point working fluid for starting and stopping according to control commands to regulate the switchgear temperature. The power-off unit is a circuit breaker or trip coil, connected in series in the power input circuit of the switchgear, and connected to the data processing module via power line carrier communication. The power line carrier communication uses the switchgear power supply line as the transmission medium to realize bidirectional transmission of control commands. When a power-off command is received, the circuit breaker or trip coil quickly acts to disconnect the power supply from the switchgear.

4. The intelligent monitoring system of switch cabinet according to claim 1, characterized in that, The status monitoring module includes a temperature sensing unit, a current sensing unit, and an auxiliary sensing unit. The temperature sensing unit is fitted into the contacts, busbars, and cable joints of the switchgear and uses one or more of thermocouples, resistance temperature detectors (RTDs), or thermistors to collect real-time surface temperature data of components. The current sensing unit is fitted into the current loop of the switchgear and uses one or more of current sensors or Hall effect sensors to detect operating current and fault current pulse signals in the loop. The auxiliary sensing unit includes a humidity sensor and a camera. The humidity sensor is located inside the switchgear cavity to collect humidity data of the environment inside the cabinet, and the camera is pointed towards key components inside the switchgear to acquire image data of component status.

5. The intelligent monitoring system of switch cabinet according to claim 1, characterized in that, The local bus unit adopts the CEBUS bus, which is connected to the interface of each sensing unit of the status monitoring module and the data processing module, respectively, and supports power line and twisted pair transmission media. The CEBUS bus adopts one or more of the following chips: LM1893 chip, ST7536 chip, SSC-P485 chip or CEWay-Ⅲ chip. The chip integrates physical layer signal processing functions, and some chips contain data link layer media access control sublayer and logical link control sublayer functions to realize connectionless data transmission with acknowledgment / no acknowledgment, and generate packet control fields containing data type, priority and sequence number.

6. The intelligent monitoring system of switch cabinet according to claim 1, characterized in that, The data processing module includes a data interface, a data processor, and a data storage device; the data interface is a multi-channel interface connected to the output of the local bus unit, and can simultaneously receive multiple types of operating status data; the data storage device is a non-volatile memory chip used to classify and store raw operating status data, preprocessed data, and historical operating records.

7. The intelligent monitoring system for switchgear according to claim 1, characterized in that, A data concentrator is provided between the data processing module and the remote monitoring center. The data concentrator includes multiple input interfaces and one output interface. The input interfaces are connected to the wireless transmission units of multiple data processing modules, which aggregate data from multiple switch cabinets. After being classified and cached by the built-in cache and distribution module, the data is transmitted in batches to the remote monitoring center through the output interface. At the same time, it receives remote control commands, parses the target switch cabinet address, and distributes it to the corresponding data processing module.

8. The intelligent monitoring system for switchgear according to claim 2, characterized in that, It also includes a power module that supplies power to the status monitoring module, the data processing module, the data transmission module and the protection control module, and the power module includes a solar panel.

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