Intelligent gas-insulated metal-enclosed switch cabinet

Abstract

The utility model discloses an intelligent gas insulated metal enclosed switch cabinet, comprising a cabinet body and a control circuit, the cabinet body is provided with an inner cavity, the inner cavity of the cabinet body is internally provided with a three-position switch mechanism, a circuit breaker and a plurality of outlet cable tubes, the three-position switch mechanism is arranged at the top of the inner cavity of the cabinet body, and the circuit breaker is arranged in the inner cavity of the cabinet body. A camera, a circuit breaker monitoring device, a partial discharge sensor, an in-cabinet environment monitoring device and a plurality of outlet cable tube temperature monitoring devices are also arranged in the inner cavity of the cabinet body; the shooting end of the camera corresponds to the position of the three-position switch mechanism; the monitoring end of the circuit breaker monitoring device corresponds to the position of the circuit breaker; the partial discharge sensor corresponds to the position of the outlet cable tube; and the outlet cable tube temperature monitoring devices are arranged at the end parts of the corresponding outlet cable tubes. According to the intelligent gas insulated metal closed switch cabinet, real-time monitoring and timely early warning can be carried out on electrical equipment and the environment in the cabinet, and potential safety hazards are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of power switch equipment, in particular to an intelligent gas-insulated metal-enclosed switch cabinet. Background Art

[0002] With the continuous development of society and economy, the complexity of engineering construction has increased, and users have higher and higher requirements for miniaturization, maintenance-free and intelligent switchgear. In the medium voltage field, especially at the 35kV voltage level, conventional switchgear with air as the insulating medium is generally large in size, heavy in weight, and difficult to operate, especially unable to meet the requirements of use in harsh environmental conditions such as high altitude, humidity, and dirt. In this context, the 40.5 new C-GIS metal-enclosed switchgear, referred to as C-GIS, has attracted more and more attention. It uses low-pressure SF6 gas as the insulating medium of the switchgear, and uses vacuum or SF6 as the arc extinguishing medium to concentrate medium-voltage components such as busbars, circuit breakers, and isolation and grounding three-position switches in the box. It has the advantages of small size, light weight, good safety, high reliability, and adaptability to use in harsh environmental conditions. However, due to the closure of the gas box, the traditional C-GIS cannot monitor the status in the cabinet in real time and timely warn, such as the inability to identify the status of the three-position switch, the inability to monitor the temperature of the cable socket, and the inability to monitor the gas density in the cabinet, which is prone to safety hazards. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an intelligent gas-insulated metal-enclosed switch cabinet, which can realize real-time monitoring and timely warning of electrical equipment and the environment inside the cabinet to avoid safety hazards.

[0004] In order to solve the above technical problems, the technical solutions adopted are as follows:

[0005] An intelligent gas-insulated metal-enclosed switch cabinet comprises a cabinet body and a control circuit. The cabinet body is provided with an inner cavity. A three-position switch mechanism, a circuit breaker and a plurality of outgoing cable pipes are arranged in the inner cavity of the cabinet body. The three-position switch mechanism is arranged at the top of the inner cavity of the cabinet body. The invention is characterized in that a camera, a circuit breaker monitoring device, a partial discharge sensor, an in-cabinet environment monitoring device and a plurality of outgoing cable pipe temperature monitoring devices are also arranged in the inner cavity of the cabinet body. The shooting end of the camera corresponds to the position of the three-position switch mechanism; the monitoring end of the circuit breaker monitoring device corresponds to the position of the circuit breaker; the partial discharge sensor corresponds to the position of the outgoing cable pipe; the in-cabinet environment monitoring device comprises a gas density sensor, a first temperature sensor and a humidity sensor; the number of outgoing cable pipe temperature monitoring devices is the same as that of the outgoing cable pipes and they correspond one to one, and the outgoing cable pipe temperature monitoring devices are installed at the ends of the corresponding outgoing cable pipes; the signal output ends of the camera, the circuit breaker monitoring device, the partial discharge sensor, the gas density sensor, the first temperature sensor, the humidity sensor and each outgoing cable pipe temperature monitoring device are respectively electrically connected to the signal input end of the control circuit.

[0006] During normal use of the above-mentioned intelligent gas-insulated metal-enclosed switchgear, the camera shoots the switch state of the three-position switch mechanism and sends the shooting picture to the outside. The staff can directly observe the position state of the three-position switch through the external display screen to avoid misjudging the current switch state; the circuit breaker monitoring device can monitor the time, angle and speed of the circuit breaker when opening and closing. The control circuit compares the detected parameters with the preset standard parameters, and determines whether the circuit breaker is abnormal according to whether the current parameters exceed the standard parameters; the partial discharge sensor detects whether partial discharge occurs at the position of the outgoing cable pipe; the outgoing cable pipe temperature monitoring device collects the temperature data of each outgoing cable pipe at all times to ensure that it can issue a timely warning when the temperature of the outgoing cable pipe is too high; the cabinet environment monitoring device monitors the gas density, overall temperature and humidity in the cabinet in real time, wherein the control circuit is preset with a standard gas density value. When the real-time gas density in the cabinet is lower than the standard gas density value, the control circuit can directly control the switch cabinet to lock in addition to issuing a warning. This intelligent gas-insulated metal-enclosed switchgear can monitor the status of each important and easily predictable component in the cabinet in real time, and can also monitor the environmental status of the cabinet in real time. When the monitored data is abnormal, it will issue a timely warning, facilitate the maintenance of the switchgear, avoid safety hazards, and thus significantly improve the safety and stability of the power system.

[0007] The above-mentioned intelligent gas-insulated metal-enclosed switchgear also includes various components for maintaining the normal operation of the switchgear, which will not be described in detail here.

[0008] The above control circuits generally use single chip microcomputers, microprocessors, PLC controllers, etc.

[0009] In a preferred embodiment, the monitoring end of the circuit breaker monitoring device corresponds to the main shaft position of the circuit breaker. The circuit breaker monitoring device monitors the time, angle and speed of the main shaft rotation when the circuit breaker is working, so as to calculate the corresponding parameters when the circuit breaker is opened and closed (such as opening and closing time, opening and closing speed, circuit breaker count, etc.).

[0010] In a further preferred embodiment, the circuit breaker monitoring device includes a magnet and a Hall sensor, wherein the magnet is mounted on the main shaft of the circuit breaker, the Hall sensor is mounted on the inner wall of the cabinet, and the sensing end of the Hall sensor corresponds to the position of the magnet. When the circuit breaker is opened and closed, the position of the magnet changes with the main shaft of the circuit breaker. At this time, the Hall sensor detects the strength and direction of the magnetic field according to the change of the magnetic field, and sends a signal to the control circuit. The control circuit calculates the opening and closing parameters according to the detection time and the strength and direction of the magnetic field, and compares them with various preset standard parameters to determine whether an abnormality occurs.

[0011] In a preferred embodiment, the gas density sensor is a sulfur hexafluoride density sensor.

[0012] In a preferred embodiment, the partial discharge sensor, the first temperature sensor and the humidity sensor are integrated into one.

[0013] In the preferred embodiment, the outlet cable pipe temperature monitoring device includes a second temperature sensor, an antenna, a magnetic steel belt, an annular mounting shell and an elastic pad. The signal output end of the second temperature sensor is electrically connected to the signal input end of the antenna. The second temperature sensor is arranged on the magnetic steel belt. The annular mounting shell is provided with a first mounting groove and a second mounting groove. The second temperature sensor and the elastic pad are installed in the first mounting groove, and the elastic pad is located outside the second temperature sensor. The inner side of the annular mounting shell is provided with a first notch connected to the first mounting groove. The detection end of the second temperature sensor extends from the first notch to the inner side of the annular mounting shell. The antenna is installed in the second mounting groove, and the first mounting groove and the second mounting groove are connected. The annular mounting shell is sleeved on the end of the outlet cable pipe. The second temperature sensor keeps in contact with the outlet cable pipe under the action of the elastic pad. The magnetic steel belt is inductively powered through the outlet cable pipe to provide power for the second temperature sensor, and the temperature data can be collected at all times. The annular mounting shell is easy to install and disassemble, and can better cooperate with the outlet cable pipe, so that the sensing end of the second temperature sensor fits with the outlet cable pipe, and the annular mounting shell is not easy to loosen. Even if the annular mounting shell is deformed after long-term use, the second temperature sensor can maintain a close fit with the outlet cable pipe under the action of the elastic pad, and will not affect the temperature measurement.

[0014] In a further preferred embodiment, at least one limiting guide groove extending inward and outward is formed on the side wall of the first installation groove, and at least one limiting guide block matching the limiting guide groove is provided on the second temperature sensor, and the limiting guide block is located in the corresponding limiting guide groove. The second temperature sensor can move inward and outward along the limiting guide groove through the limiting guide block, and the limiting guide block can also limit the second temperature sensor, thereby preventing the second temperature sensor from falling from the first notch under the action of the elastic pad.

[0015] In a further preferred embodiment, at least one inwardly protruding installation stop block is provided on the inner wall of the annular installation shell; a second notch matching the installation stop block is provided on the outlet cable tube. When the annular installation shell is sleeved on the outlet cable tube, the installation stop block can limit the position of the annular installation shell to prevent the annular installation shell from rotating.

[0016] In a further preferred embodiment, the elastic pad is made of an elastic silicone pad.

[0017] The beneficial effect of the utility model is that the intelligent gas-insulated metal-enclosed switch cabinet can realize real-time monitoring and timely warning of the electrical equipment and the environment inside the cabinet, thereby avoiding potential safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of an intelligent gas-insulated metal-enclosed switchgear in an embodiment of the utility model;

[0019] Figure 2 for Figure 1 A magnified view of position A in the middle;

[0020] Figure 3 for Figure 1 A magnified view of position B in the middle;

[0021] Figure 4 for Figure 1 Enlarged view of the C position in the middle;

[0022] Figure 5 for Figure 1 Enlarged view of the D position in the middle;

[0023] Figure 6 for Figure 1 Enlarged view of position E in the middle;

[0024] Figure 7 This is a schematic diagram of the structure of the outlet cable pipe temperature monitoring device in the embodiment of the utility model;

[0025] Figure 8 This is a schematic diagram of the internal structure of the outlet cable pipe temperature monitoring device in the embodiment of the utility model;

[0026] Fig. 9 It is a structural schematic diagram of the outgoing cable pipe temperature monitoring device and the outgoing cable pipe in the embodiment of the utility model. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0028] like Figure 1-9 The intelligent gas-insulated metal-enclosed switchgear shown in the figure comprises a cabinet 1 and a control circuit (not visible in the figure), the cabinet 1 is provided with an inner cavity 101, in which a three-position switch mechanism 102, a circuit breaker 103 and a plurality of outgoing cable tubes 104 are arranged, and the three-position switch mechanism 102 is arranged at the top of the inner cavity 101 of the cabinet 1; a camera 105, a circuit breaker monitoring device 106, a partial discharge sensor 107, an in-cabinet environment monitoring device 108 and a plurality of outgoing cable tube temperature monitoring devices 109 are also arranged in the inner cavity 101 of the cabinet 1, and the shooting end of the camera 105 corresponds to the position of the three-position switch mechanism 102; the monitoring end of the circuit breaker monitoring device 106 corresponds to the position of the circuit breaker 1 03; the partial discharge sensor 107 corresponds to the position of the outgoing cable pipe 104; the cabinet environment monitoring device 108 includes a gas density sensor 1081, a first temperature sensor and a humidity sensor; the number of outgoing cable pipe temperature monitoring devices 109 is the same as that of the outgoing cable pipes 104 and they correspond one to one, and the outgoing cable pipe temperature monitoring devices 109 are installed at the ends of the corresponding outgoing cable pipes 104; the camera 105, the circuit breaker monitoring device 106, the partial discharge sensor 107, the gas density sensor 1081, the first temperature sensor, the humidity sensor and the signal output ends of each outgoing cable pipe temperature monitoring device 109 are electrically connected to the signal input end of the control circuit respectively.

[0029] During normal use of the above-mentioned intelligent gas-insulated metal-enclosed switchgear, the camera 105 takes a picture of the switch state of the three-position switch mechanism 102 and sends the picture to the outside. The staff can directly observe the position state of the three-position switch through the external display screen to avoid misjudging the current switch state; the circuit breaker monitoring device 106 can monitor the time, angle and speed of the circuit breaker 103 when it is opened and closed. The control circuit compares the detected parameters with the preset standard parameters, and determines whether the circuit breaker 103 is abnormal according to whether the current parameters exceed the standard parameters. The local discharge sensor 107 detects whether there is a local discharge phenomenon at the location of the outlet cable tube 104; the outlet cable tube temperature monitoring device 109 collects the temperature data of each outlet cable tube 104 at all times to ensure that a timely warning can be issued when the temperature of the outlet cable tube 104 is too high; the cabinet environment monitoring device 108 monitors the gas density, overall temperature and humidity in the cabinet in real time, wherein a standard gas density value is preset in the control circuit. When the real-time gas density in the cabinet is lower than the standard gas density value, the control circuit can directly control the switch cabinet to lock in addition to issuing an early warning. This intelligent gas-insulated metal-enclosed switch cabinet can monitor the status of each important and easily predicted component in the cabinet in real time, and can also monitor the environmental status of the cabinet body 1 in real time, and issue an early warning in time when the monitored data is abnormal, so as to facilitate the maintenance of the switch cabinet and avoid potential safety hazards, thereby significantly improving the safety and stability of the power system.

[0030] The above-mentioned intelligent gas-insulated metal-enclosed switchgear also includes various components for maintaining the normal operation of the switchgear, which will not be described in detail here.

[0031] The monitoring end of the circuit breaker monitoring device 106 corresponds to the main shaft position of the circuit breaker 103. The circuit breaker monitoring device 106 monitors the time, angle and speed of the main shaft rotation when the circuit breaker 103 is working, so as to calculate the corresponding parameters when the circuit breaker 103 is opened and closed (such as opening and closing time, opening and closing speed, circuit breaker 103 count, etc.).

[0032] The circuit breaker monitoring device 106 includes a magnet and a Hall sensor. The magnet is mounted on the main shaft of the circuit breaker 103, and the Hall sensor is mounted on the inner wall of the cabinet 1, and the sensing end of the Hall sensor corresponds to the position of the magnet. When opening and closing the circuit breaker, the position of the magnet changes with the main shaft of the circuit breaker 103. At this time, the Hall sensor detects the strength and direction of the magnetic field according to the change of the magnetic field, and sends a signal to the control circuit. The control circuit calculates the opening and closing parameters according to the detection time and the strength and direction of the magnetic field, and compares them with various preset standard parameters to determine whether an abnormality occurs.

[0033] The gas density sensor 1081 uses a sulfur hexafluoride density sensor.

[0034] The partial discharge sensor 107, the first temperature sensor and the humidity sensor are integrated into one.

[0035] The outlet cable pipe temperature monitoring device 109 includes a second temperature sensor 1091, an antenna 1092, a magnetic steel belt 1093, an annular mounting shell 1094 and an elastic pad 1095. The signal output end of the second temperature sensor 1091 is electrically connected to the signal input end of the antenna 1092. The second temperature sensor 1091 is inserted into the magnetic steel belt 1093. The annular mounting shell 1094 is provided with a first mounting groove 10941 and a second mounting groove 10942. The second temperature sensor 1091 and the elastic pad 1095 are installed in the first mounting groove. 10941, and the elastic pad 1095 is located on the outside of the second temperature sensor 1091, the inner side of the annular mounting shell 1094 is provided with a first notch 10943 connected to the first mounting groove 10941, and the detection end of the second temperature sensor 1091 extends from the first notch 10943 to the inner side of the annular mounting shell 1094; the antenna 1092 is installed in the second mounting groove 10942, and the first mounting groove 10941 and the second mounting groove 10942 are connected; the annular mounting shell 1094 is sleeved on the end of the outlet cable tube 104. The second temperature sensor 1091 keeps in contact with the outlet cable tube 104 under the action of the elastic pad 1095, and the magnetic steel belt 1093 is inductively charged through the outlet cable tube 104 to provide power for the second temperature sensor 1091, and the temperature data can be collected at all times. The annular mounting shell 1094 is easy to install and disassemble, and can better cooperate with the outlet cable tube 104, so that the sensing end of the second temperature sensor 1091 fits with the outlet cable tube 104, and the annular mounting shell 1094 is not easy to loosen. Even if the annular mounting shell 1094 is deformed after long-term use, the second temperature sensor 1091 can maintain a close fit with the outlet cable tube 104 under the action of the elastic pad 1095, and will not affect the temperature measurement.

[0036] Two limiting guide grooves 109411 extending inward and outward are formed on the side wall of the first installation groove 10941. Two limiting guide blocks 10911 matching the limiting guide grooves 109411 are provided on the second temperature sensor 1091. The limiting guide blocks 10911 are located in the corresponding limiting guide grooves 109411. The second temperature sensor 1091 can move inward and outward along the limiting guide grooves 109411 through the limiting guide blocks 10911, and the limiting guide blocks 10911 can also limit the second temperature sensor 1091, so as to prevent the second temperature sensor 1091 from falling from the first notch 10943 under the action of the elastic pad 1095.

[0037] Two inwardly protruding installation limit blocks 10944 are provided on the inner wall of the annular installation shell 1094; a second notch 1041 matching the installation limit blocks 10944 is provided on the outlet cable tube 104. When the annular installation shell 1094 is sleeved on the outlet cable tube 104, the installation limit blocks 10944 can limit the position of the annular installation shell 1094 to prevent the annular installation shell 1094 from rotating.

[0038] The elastic pad 1095 is made of an elastic silicone pad.

Claims

1. An intelligent gas-insulated metal-enclosed switchgear, comprising a cabinet and a control circuit, wherein the cabinet is provided with an inner cavity, wherein a three-position switch mechanism, a circuit breaker and a plurality of outgoing cable tubes are arranged in the inner cavity of the cabinet, and wherein the three-position switch mechanism is arranged at the top of ... The inner cavity of the cabinet is also provided with a camera, a circuit breaker monitoring device, a partial discharge sensor, an in-cabinet environment monitoring device and a plurality of outgoing cable pipe temperature monitoring devices, wherein the shooting end of the camera corresponds to the position of the three-position switch mechanism; the monitoring end of the circuit breaker monitoring device corresponds to the position of the circuit breaker; the partial discharge sensor corresponds to the position of the outgoing cable pipe; the in-cabinet environment monitoring device includes a gas density sensor, a first temperature sensor and a humidity sensor; the number of the outgoing cable pipe temperature monitoring devices is the same as that of the outgoing cable pipes and they correspond one to one, and the outgoing cable pipe temperature monitoring devices are installed at the ends of the corresponding outgoing cable pipes; the signal output ends of the camera, the circuit breaker monitoring device, the partial discharge sensor, the gas density sensor, the first temperature sensor, the humidity sensor and each outgoing cable pipe temperature monitoring device are electrically connected to the signal input end of the control circuit respectively.

2. The intelligent gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The monitoring end of the circuit breaker monitoring device corresponds to the main shaft position of the circuit breaker.

3. The intelligent gas-insulated metal-enclosed switchgear according to claim 2, characterized in that: The circuit breaker monitoring device comprises a magnet and a Hall sensor, wherein the magnet is mounted on the main shaft of the circuit breaker, the Hall sensor is mounted on the inner wall of the cabinet, and the sensing end of the Hall sensor corresponds to the position of the magnet.

4. The intelligent gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The gas density sensor adopts a sulfur hexafluoride density sensor.

5. The intelligent gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The partial discharge sensor, the first temperature sensor and the humidity sensor are integrated into one.

6. The intelligent gas-insulated metal-enclosed switchgear according to claim 1, characterized in that: The outlet cable pipe temperature monitoring device includes a second temperature sensor, an antenna, a magnetic steel belt, an annular mounting shell and an elastic pad. The signal output end of the second temperature sensor is electrically connected to the signal input end of the antenna. The second temperature sensor is inserted into the magnetic steel belt. The annular mounting shell is provided with a first mounting groove and a second mounting groove. The second temperature sensor and the elastic pad are installed in the first mounting groove, and the elastic pad is located on the outside of the second temperature sensor. The inner side surface of the annular mounting shell is provided with a first notch connected to the first mounting groove. The detection end of the second temperature sensor extends from the first notch to the inner side of the annular mounting shell; the antenna is installed in the second mounting groove, and the first mounting groove and the second mounting groove are connected; the annular mounting shell is sleeved on the end of the outlet cable pipe.

7. The intelligent gas-insulated metal-enclosed switchgear according to claim 6, characterized in that: At least one limiting guide groove extending inward and outward is formed on the side wall of the first installation groove, and at least one limiting guide block matching the limiting guide groove is provided on the second temperature sensor, and the limiting guide block is located in the corresponding limiting guide groove.

8. The intelligent gas-insulated metal-enclosed switchgear according to claim 6, characterized in that: At least one inwardly protruding installation limit block is arranged on the inner wall of the annular installation shell; and a second notch matching the installation limit block is opened on the outlet cable tube.

9. The intelligent gas-insulated metal-enclosed switchgear according to claim 6, characterized in that: The elastic pad is made of an elastic silicone pad.

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