A switchgear monitoring system

Abstract

This utility model discloses a switchgear monitoring system, comprising: a data acquisition unit for acquiring data information from various areas of the switchgear; the data acquisition unit includes: a cable compartment data acquisition device located in the cable compartment of the switchgear; a circuit breaker compartment data acquisition device located in the circuit breaker compartment of the switchgear; a secondary compartment data acquisition device located in the secondary compartment of the switchgear; a busbar compartment data acquisition device located in the busbar compartment of the switchgear; an enclosure data acquisition device located on the enclosure of the switchgear; a display unit for displaying the data information from various areas of the switchgear acquired by the data acquisition unit; a control unit connected to the data acquisition unit and the display unit respectively, the control unit receiving the data information from various areas of the switchgear acquired by the data acquisition unit and controlling the display unit to display the data; and a power supply unit connected to the data acquisition unit, the display unit, and the control unit respectively. This system enables rapid location of fault areas and improves maintenance efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of switchgear technology, and in particular relates to a switchgear monitoring system. Background Technology

[0002] Switchgear is a crucial electrical device in power systems, playing an irreplaceable role in power transmission, distribution, and protection. As a bridge connecting power plants, substations, and end users, switchgear not only ensures the safe and reliable transmission of electricity but also provides effective control and protection for the power system.

[0003] Monitoring and management of switchgear is a crucial aspect of ensuring the safe and reliable operation of power systems. With technological advancements, modern switchgear increasingly integrates advanced sensor technologies and communication modules, enabling real-time monitoring and remote management of its status. Currently, monitoring methods include partial discharge monitoring and mechanical condition monitoring, but these devices are not differentiated according to their functions. When a fault occurs, further investigation of the fault area is required, increasing the time spent on routine maintenance and repair of the switchgear, resulting in a heavy workload and low efficiency.

[0004] Therefore, how to design a switchgear monitoring system that can quickly locate fault areas is the technical problem that this utility model aims to solve. Utility Model Content

[0005] This invention provides a switchgear monitoring system that enables rapid identification of fault areas and improves maintenance efficiency.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a switchgear monitoring system, including:

[0008] A data acquisition unit is used to collect data information from multiple areas of the switch cabinet. The data acquisition unit includes:

[0009] A cable compartment data acquisition device is installed in the cable compartment of the switch cabinet;

[0010] A circuit breaker compartment data acquisition device is located in the circuit breaker compartment of the switchgear;

[0011] A secondary chamber data acquisition device is installed in the secondary chamber of the switch cabinet;

[0012] A busbar compartment data acquisition device is located in the busbar compartment of the switchgear.

[0013] An enclosure collection device is installed on the enclosure of the switch cabinet;

[0014] The display unit is used to display the data information of each area of ​​the switch cabinet collected by the acquisition unit;

[0015] A control unit, which is connected to the acquisition unit and the display unit respectively;

[0016] A power supply unit is connected to the acquisition unit, the display unit, and the control unit, respectively.

[0017] In some embodiments of this application, the cable chamber data acquisition device includes:

[0018] The first partial discharge sensor collects the amount of partial discharge at the cable lap joint in the indoor cable room.

[0019] A cable room temperature and humidity sensor that collects the temperature and humidity inside the cable room;

[0020] A cable compartment temperature sensor collects the temperature at the cable lap joints within the cable compartment.

[0021] A surge arrester leakage current sensor, which collects leakage current data of the indoor surge arrester of the cable;

[0022] A camera in the cable room collects video data from inside the cable room.

[0023] In some embodiments of this application, the circuit breaker compartment data acquisition device includes:

[0024] A mechanical characteristic sensor, which collects the mechanical action signals of the indoor circuit breaker of the circuit breaker;

[0025] A circuit breaker compartment temperature sensor collects the temperature of the circuit breaker contact arms and contacts inside the circuit breaker compartment.

[0026] A camera in the circuit breaker room collects video data from inside the circuit breaker room.

[0027] In some embodiments of this application, the secondary chamber acquisition device includes:

[0028] The first current sensor in the secondary chamber collects the current data of the closing circuit of the circuit breaker, the current data of the opening circuit of the circuit breaker, and the current data of the energy storage motor circuit.

[0029] A secondary room temperature and humidity sensor, which collects the temperature and humidity of the secondary room;

[0030] The second current sensor in the secondary chamber collects the secondary current data of the switchgear.

[0031] In some embodiments of this application, the busbar compartment acquisition device includes a busbar compartment temperature sensor, which acquires the temperature at the busbar overlap point inside the busbar compartment.

[0032] In some embodiments of this application, both the cable compartment temperature sensor and the busbar compartment temperature sensor are CT-sensing power-operated temperature sensors.

[0033] In some embodiments of this application, the housing acquisition device includes a second partial discharge sensor, which acquires the discharge amount of the switch cabinet housing.

[0034] In some embodiments of this application, the switch cabinet monitoring system further includes a communication unit, and the control unit is connected to a remote control terminal or an external data acquisition device through the communication unit.

[0035] In some embodiments of this application, the communication unit includes several RS485 interfaces and several RJ45 network ports.

[0036] In some embodiments of this application, the power supply unit includes dual power supplies.

[0037] Compared with the prior art, the advantages and positive effects of this utility model are as follows: By setting different acquisition devices in different areas on the switchgear, this application can acquire almost all the data required for switchgear status monitoring. The display unit can intuitively display the monitoring data. The control unit and power supply unit ensure the normal operation of the system. When a switchgear failure occurs, the fault area can be quickly located for repair. This provides guidance and reference for analyzing the safe operation of switchgear equipment and the daily maintenance and condition inspection of switchgear. It also provides a strong guarantee for the safe and stable operation of the liquid level power system. Attached Figure Description

[0038] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a system block diagram of an embodiment of a switchgear monitoring system according to the present invention;

[0040] Figure 2 This is a schematic diagram showing the installation of the data acquisition unit on the switchgear in one embodiment of the switchgear monitoring system of this utility model;

[0041] Figure 3 This is a schematic diagram showing the installation of the cable compartment data acquisition device in a cable compartment according to one embodiment of the switchgear monitoring system of this utility model;

[0042] Figure 4This is a schematic diagram illustrating the installation of the circuit breaker compartment data acquisition device in a circuit breaker compartment within one embodiment of the switchgear monitoring system of this utility model.

[0043] Figure 5 This is a schematic diagram showing the installation of the secondary chamber acquisition device in a secondary chamber of a switchgear monitoring system according to this utility model;

[0044] Figure 6 This is a schematic diagram showing the installation of the busbar compartment data acquisition device in a busbar compartment according to one embodiment of the switchgear monitoring system of this utility model;

[0045] Explanation of reference numerals in the attached figures:

[0046] 1. Switch cabinet; 10. Housing; 11. Second partial discharge sensor;

[0047] 100. Cable compartment; 101. First partial discharge sensor; 102. Cable compartment temperature and humidity sensor; 103. Cable compartment temperature sensor; 104. Surge arrester leakage current sensor; 105. Cable compartment camera;

[0048] 200. Circuit breaker compartment; 201. Mechanical characteristic sensor; 202. Circuit breaker compartment temperature sensor; 203. Circuit breaker compartment camera; 204. Circuit breaker contact arm; 205. Circuit breaker contact;

[0049] 300. Secondary chamber; 301. Secondary chamber first current sensor; 302. Secondary chamber temperature and humidity sensor; 303. Secondary chamber second current sensor;

[0050] 400. Busbar compartment; 401. Busbar compartment temperature sensor;

[0051] 500. Touchscreen display. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0053] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0057] like Figures 1 to 6 As shown, this application provides a switchgear monitoring system that can intuitively reflect the monitoring parameters of each area of ​​switchgear 1, quickly locate fault areas, and greatly improve maintenance efficiency. The switchgear monitoring system includes a data acquisition unit, a display unit, and a control unit.

[0058] Existing switchgear 1 typically includes the following areas: a cable compartment 100 for connecting cables and distributing power; a secondary compartment 300 for installing various instruments and control equipment; a circuit breaker compartment 200 for installing circuit breakers (for control and protection circuits); a busbar compartment 400 for installing busbars to provide power transmission channels; and a housing 10 for protecting internal electrical components. The switchgear monitoring system proposed in this application is also designed based on this type of switchgear. Therefore, the acquisition unit is equipped with acquisition devices corresponding to each area to collect data information from each area of ​​the switchgear 1. The acquisition unit includes:

[0059] A cable compartment data acquisition device is installed in the cable compartment 100 of switchgear 1.

[0060] Circuit breaker compartment data acquisition device, which is installed in circuit breaker compartment 200 in switchgear 1;

[0061] The secondary chamber data acquisition device is installed in the secondary chamber 300 of switchgear 1.

[0062] Busbar compartment data acquisition device, the busbar compartment 400 data acquisition device is installed in the busbar compartment 400 in switchgear 1;

[0063] The enclosure acquisition device is installed on the enclosure 10 of the switch cabinet 1.

[0064] The display unit, which can be a touch screen 500, is installed on the outer surface of the secondary chamber 300 of the switch cabinet 1. The display unit is used to display the data information of each area of ​​the switch cabinet 1 collected by the acquisition unit.

[0065] The control unit is connected to the acquisition unit and the display unit respectively. The control unit receives the data information of each area of ​​the switch cabinet 1 collected by the acquisition unit and controls the display unit to display it.

[0066] The power supply unit is connected to the acquisition unit, display unit, and control unit respectively, and provides power for the operation of the switch cabinet monitoring system.

[0067] In use, the control unit controls each acquisition device in the acquisition unit to collect data information from each area of ​​switch cabinet 1, and then transmits it to the display unit. The control unit controls the display unit to display the data. The staff can intuitively obtain the data information from each area of ​​switch cabinet 1 from the display unit. If a fault occurs, the faulty area can be quickly located for targeted repair, which greatly improves work efficiency. The process of the control unit controlling the acquisition unit to collect data and the process of the control unit controlling the display unit to display the data are existing technologies and will not be described in detail here.

[0068] like Figure 3 As shown, the cable room data acquisition device includes: a first partial discharge sensor 101, a cable room temperature and humidity sensor 102, a cable room temperature sensor 103, a surge arrester leakage current sensor 104, and a cable room camera 105.

[0069] The first partial discharge sensor 101 is installed at the cable splice in the cable room to collect the partial discharge amount at the cable splice in the cable room 100. The first partial discharge sensor 101 adopts an integrated partial discharge sensor of transient ground wave and ultrasonic wave. The first partial discharge sensor 101 uses the detection principle of transient ground wave and ultrasonic wave to collect the partial discharge amount and then transmits the data to the control unit through 2.4GH wireless communication.

[0070] The cable temperature and humidity sensor 102 is installed in the cable chamber. The cable temperature and humidity sensor 102 collects the temperature and humidity inside the cable chamber 100 and transmits the data to the control unit via 2.4GH wireless communication.

[0071] The cable compartment temperature sensor 103 is installed at the cable splice in the cable compartment. After collecting the temperature at the cable splice, the sensor 103 transmits the data to the control unit via 2.4GHz wireless communication. The temperature at the cable splice is collected separately for all three phases (A, B, and C).

[0072] The surge arrester leakage current sensor 104 is installed on the grounding lead of the surge arrester in the cable room. The surge arrester leakage current sensor 104 collects the leakage current data of the surge arrester in the cable room 100 and transmits the data to the control unit through a hard-wired wire. The leakage current data includes three phases A, B, and C. The surge arrester leakage current sensor 104 can be a through-hole current sensor and is installed on the grounding lead of the surge arrester.

[0073] The cable room camera 105 is installed in the cable room. The cable room camera 105 is a dual-spectrum camera that collects visible light and infrared video data in the cable room 100 and transmits the data to the control unit via a network cable.

[0074] like Figure 4 As shown, the circuit breaker compartment data acquisition device includes: a mechanical characteristic sensor 201, a circuit breaker compartment temperature sensor 202, and a circuit breaker compartment camera 203.

[0075] The mechanical characteristic sensor 201 is installed at the drive shaft of the circuit breaker. The mechanical characteristic sensor 201 collects the mechanical action signals of the circuit breaker in the circuit breaker compartment 200, such as the angular displacement of the circuit breaker. The mechanical characteristic sensor 201 can be an angular displacement sensor. After collecting the data, it is transmitted to the control unit through a hard-wired wire.

[0076] The circuit breaker compartment temperature sensor 202 comprises multiple sensors, which are respectively installed on the circuit breaker contact arm 204 and the circuit breaker contact 205. The circuit breaker contact arm 204 includes an upper contact arm (containing three phases A, B, C) and a lower contact arm (containing three phases A, B, C). Each contact arm has one contact. The circuit breaker compartment temperature sensor 202 collects the temperature of the upper contact arm (containing three phases A, B, C), the temperature of the lower contact arm (containing three phases A, B, C), and the temperature of the moving contact of the circuit breaker within the circuit breaker compartment 200. The temperature sensors for collecting the temperature of the upper and lower contact arms and the temperature sensors for collecting the temperature of the circuit breaker contacts are all contact-type temperature sensors. The data is transmitted to the control unit via 2.4GHz wireless communication.

[0077] The circuit breaker room camera 203 is installed inside the circuit breaker room. The circuit breaker room camera 203 is a dual-spectrum camera that collects visible light and infrared video data inside the circuit breaker room 200 and transmits the data to the control unit via a network cable.

[0078] like Figure 5 As shown, the secondary chamber acquisition device includes: a secondary chamber first current sensor 301, a secondary chamber temperature and humidity sensor 302, and a secondary chamber second current sensor 303.

[0079] The secondary chamber first current sensor 301 comprises multiple sensors, all of which are open-type Hall current sensors. In this embodiment, three open-type Hall current sensors are respectively installed in the circuit breaker closing circuit, the circuit breaker opening circuit, and the energy storage motor circuit. They respectively collect the current data of the circuit breaker closing circuit, the circuit breaker opening circuit, and the energy storage motor circuit, and transmit the data to the control unit via hard-wired wires. The energy storage motor is a conventional component in the switchgear 1, and the energy storage motor circuit is also a conventional circuit during the operation of the switchgear 1, which will not be described in detail here.

[0080] The secondary room temperature and humidity sensor 302 is installed in the secondary room. The secondary room temperature and humidity sensor 302 collects the temperature and humidity in the secondary room 300 and transmits the data to the control unit via 2.4GH wireless communication.

[0081] The secondary current sensor 303 is installed on the secondary current circuit, which includes three phases A, B, and C. Therefore, a secondary current sensor 303 is installed on each of the three phases. The secondary current sensor 303 collects the secondary current data of switchgear 1 and transmits the data to the control unit via hard-wired wires. The secondary current sensor 303 uses an open-type current transformer, typically with a small measurement range, such as 0~5A. The secondary current of the switchgear refers to the current flowing through the secondary circuit of the switchgear. These currents are mainly used for monitoring, controlling, measuring, regulating, and protecting primary equipment. The relevant content of the switchgear secondary circuit is basic knowledge in this field and will not be elaborated upon here.

[0082] like Figure 6 As shown, the busbar compartment 400 acquisition device includes a busbar compartment temperature sensor 401. The busbar compartment temperature sensor 401 is installed at the busbar overlap in the busbar compartment. The busbar compartment temperature sensor 401 acquires the temperature at the busbar overlap in the busbar compartment 400 and transmits the data to the control unit via 2.4GH communication.

[0083] Both the cable compartment temperature sensor 103 and the busbar compartment temperature sensor 401 mentioned above are CT-inductive power-operated temperature sensors. CT-inductive power-operated temperature sensors have high accuracy, high stability, and strong anti-interference capabilities, making them suitable for applications requiring real-time monitoring.

[0084] The enclosure acquisition device includes a second partial discharge sensor 11, which acquires the partial discharge quantity of the switch cabinet enclosure 10 and transmits the data to the control unit via 2.4GHz communication. The second partial discharge sensor 11 is a transient ground wave partial discharge sensor, also called a transient ground voltage partial discharge sensor.

[0085] In this embodiment, the 2.4GHz communication, network cable, or hard-wired data transmission method is selected based on the transmission principle of the sensor itself, which is highly targeted and has high transmission efficiency.

[0086] The switchgear monitoring system also includes a communication unit, through which the control unit connects to a remote control terminal or an external data acquisition device. The remote control terminal, such as a computer, allows operators to remotely receive operational data from switchgear 1, greatly increasing convenience. External data acquisition devices, such as other sensors not mentioned above, further enhance the comprehensiveness of the monitoring data and improve monitoring accuracy.

[0087] The communication unit includes several RS485 interfaces and several RJ45 network ports. This embodiment includes eight isolated RS485 interfaces and two RJ45 network ports. The RS485 interfaces connect to the control unit and can be used to connect to detection data from other sensors not mentioned above. The RJ45 network ports support transmitting data from the switchgear monitoring system to a remote control terminal via protocols such as MODBUS TCP, IEC101, IEC103, IEC104, and DLT860.

[0088] The power supply unit includes dual power supplies. It can be connected to both AC and DC power sources, enabling dual-power redundancy and hot backup.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0090] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by this utility model.

[0091] Whenever possible, the various aspects and features described and shown in the specification can be applied individually, and these individual aspects can serve as the subject of a divisional application.

Claims

1. A switchgear monitoring system, characterized in that, include: A data acquisition unit is used to collect data information from multiple areas of the switch cabinet. The data acquisition unit includes: A cable compartment data acquisition device is installed in the cable compartment of the switch cabinet; A circuit breaker compartment data acquisition device is located in the circuit breaker compartment of the switchgear; A secondary chamber data acquisition device is installed in the secondary chamber of the switch cabinet; A busbar compartment data acquisition device is located in the busbar compartment of the switchgear. An enclosure collection device is installed on the enclosure of the switch cabinet; The display unit is used to display the data information of each area of ​​the switch cabinet collected by the acquisition unit; A control unit, which is connected to the acquisition unit and the display unit respectively; A power supply unit is connected to the acquisition unit, the display unit, and the control unit, respectively.

2. The switchgear monitoring system according to claim 1, characterized in that, The cable chamber data acquisition device includes: The first partial discharge sensor collects the amount of partial discharge at the cable lap joint in the indoor cable room. A cable room temperature and humidity sensor that collects the temperature and humidity inside the cable room; A cable compartment temperature sensor collects the temperature at the cable lap joints within the cable compartment. A surge arrester leakage current sensor, which collects leakage current data of the indoor surge arrester of the cable; A camera in the cable room collects video data from inside the cable room.

3. The switchgear monitoring system according to claim 1, characterized in that, The circuit breaker compartment data acquisition device includes: A mechanical characteristic sensor, which collects the mechanical action signals of the indoor circuit breaker of the circuit breaker; A circuit breaker compartment temperature sensor collects the temperature of the circuit breaker contact arms and contacts inside the circuit breaker compartment. A camera in the circuit breaker room collects video data from inside the circuit breaker room.

4. The switchgear monitoring system according to claim 1, characterized in that, The secondary chamber acquisition device includes: The first current sensor in the secondary chamber collects the current data of the closing circuit of the circuit breaker, the current data of the opening circuit of the circuit breaker, and the current data of the energy storage motor circuit. A secondary room temperature and humidity sensor, which collects the temperature and humidity of the secondary room; The second current sensor in the secondary chamber collects the secondary current data of the switchgear.

5. The switchgear monitoring system according to claim 1, characterized in that, The busbar compartment acquisition device includes a busbar compartment temperature sensor, which acquires the temperature at the busbar overlap point inside the busbar compartment.

6. The switchgear monitoring system according to claim 3 or 5, characterized in that, Both the cable compartment temperature sensor and the busbar compartment temperature sensor are CT-type induction-powered temperature sensors.

7. The switchgear monitoring system according to claim 1, characterized in that, The enclosure acquisition device includes a second partial discharge sensor, which acquires the discharge amount of the switch cabinet enclosure.

8. The switchgear monitoring system according to claim 1, characterized in that, The switchgear monitoring system also includes a communication unit, through which the control unit is connected to a remote control terminal or an external data acquisition device.

9. The switchgear monitoring system according to claim 8, characterized in that, The communication unit includes several RS485 interfaces and several RJ45 network ports.

10. The switchgear monitoring system according to claim 1, characterized in that, The power supply unit includes dual power supplies.

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