Power distribution drawer switch plug connector temperature on-line monitoring system

Abstract

The utility model discloses a power distribution drawer switch plug connector temperature on-line monitoring system. The system comprises a temperature sampling device, a temperature acquisition device, a communication transmission device and a control device. Wherein the temperature sampling device is used for extracting the temperature of the power distribution drawer switch plug connector through temperature sensing equipment; the temperature acquisition device is used for receiving the temperature sample data extracted by the temperature sampling device; the control device is used for operating through a touch screen, dynamically displaying and controlling the temperature of the switch plug wires of all the power distribution drawers in real time, giving an alarm, and querying a historical trend; and the communication transmission device is used for receiving and transmitting the data acquired by the temperature acquisition device and transmitting the data to the control device for display and control. The temperature of the power distribution drawer switch plug connector in the power transformation and distribution system can be monitored on line, so that potential safety hazards caused by cable overheating are prevented, and the safety and stability of operation of power transformation and distribution equipment are improved.

Description

Technical Field

[0001] This application relates to the technical field of monitoring of variable power distribution systems, and particularly to an on-line temperature monitoring system for plug connectors of distribution drawer switches. Background Art

[0002] In the existing variable power distribution technology, high-voltage switch cabinets are widely used and play the role of connecting and disconnecting power equipment. However, due to reasons such as manufacturing processes, transportation and installation, and operation aging, the contacts may heat up abnormally. Therefore, it is very necessary to perform on-line temperature monitoring on the contacts of switch cabinets, cable terminal joints, etc.

[0003] Furthermore, common temperature measurement techniques include: optical fiber temperature measurement, infrared temperature measurement, and wireless induction temperature measurement, etc. Among them, in optical fiber temperature measurement, the insulation performance may be reduced due to the accumulation of dust inside the optical fiber. Infrared temperature measurement is easily affected by the external environment. Wireless induction temperature measurement requires the installation of induction coils inside high-voltage switch cabinets, and the reliability and stability during long-term operation are difficult to guarantee.

[0004] Wireless temperature measurement technology uses passive wireless sensors and wireless receiving units, and has obvious safety, reliability, and maintainability. However, the operating environment inside enclosed switch cabinets is harsh, and electromagnetic interference may affect the accuracy of temperature measurement.

[0005] Currently, for temperature measurement of plug connectors of distribution drawer switches, it mainly relies on manually holding an infrared temperature sensor for temperature measurement. However, this method has two obvious deficiencies: one is that there is a risk of electric shock in manual temperature measurement, and the other is that manual real-time temperature measurement is impossible, and the response to abnormal temperature changes of drawer switches is slow.

[0006] At the same time, since variable power distribution drawer switches are designed to be quickly replaced with spare units without power interruption of the bus after a fault, each drawer switch is movable and detachable. Therefore, there is a situation where it is impossible to directly install a temperature measurement device for temperature measurement due to the compact internal space.

[0007] In summary, the main reasons for cable overheating during the operation of variable power distribution equipment include that the cable conductor resistance does not meet the requirements, the cable selection type is inappropriate, the cable arrangement is too dense during installation, the joint manufacturing technology is poor, the cable phase insulation performance is poor, and the local sheath of the armored cable is damaged. If these factors are not dealt with in time, it may lead to insulation thermal breakdown phenomenon when the cable continues to be energized continuously, thus affecting the normal operation and safety of variable power distribution equipment.

[0008] Therefore, in the existing variable power distribution monitoring technology, there is a technical problem of potential safety hazards caused by cable overheating during the operation of variable power distribution equipment. Utility Model Content

[0009] In view of the above-mentioned disadvantages of the prior art, the purpose of the present application is to provide an on-line temperature monitoring system for the plug-in of a distribution drawer switch, which is used to solve the technical problem that in the existing power transformation and distribution monitoring technology, there are potential safety hazards caused by overheating of cables during the operation of power transformation and distribution equipment.

[0010] To achieve the above object and other related objects, the present application provides an on-line temperature monitoring system for the plug-in of a distribution drawer switch, which is used to detect the cable plug-in in a power transformation and distribution switch. The system includes: a temperature sampling device, a temperature acquisition device, a communication transmission device, and a control device; the temperature sampling device is used to extract the temperature of the plug-in of the distribution drawer switch through a temperature sensing device; the temperature acquisition device is electrically connected to the temperature sampling device and is used to receive the temperature sample data extracted by the temperature sampling device; the control device is used to operate through a touch screen and perform dynamic real-time display of the temperature display, control, and alarm of all distribution drawer switch wires, as well as query the historical trend; the communication transmission device is electrically connected to the temperature acquisition device and the control device respectively, and is used to receive and transmit the data collected by the temperature acquisition device and transmit it to the control device for display and control.

[0011] In an embodiment of the present application, the temperature sampling device includes: a primary plug-in cable, a temperature sensor, and a plug spring terminal; the output end of the primary plug-in cable is electrically connected to the input end of the temperature sensor; the output end of the temperature sensor is fixedly connected to the input end of the plug spring terminal; the output end of the plug spring terminal is electrically connected to the input end of the temperature acquisition device.

[0012] In an embodiment of the present application, the temperature sensor includes a contact type temperature sensor; the temperature sensor is made of resin material; the temperature sensor uses a high-voltage tape and thermal conductive silicone to bundle and fix the three-phase primary plug-in cable; the temperature that the temperature sensor can withstand is greater than or equal to -40°C and less than or equal to 200°C.

[0013] In an embodiment of the present application, the temperature acquisition device includes: a secondary plug-in terminal block and a temperature acquisition module; the input end of the secondary plug-in terminal block is connected to the output end of the temperature sampling device; the output end of the temperature acquisition module is connected to the input end of the communication transmission device.

[0014] In an embodiment of the present application, the secondary plug-in terminal block is of a plug-in type; the secondary plug-in terminal block includes: a male plug and a female plug; the male plug and the female plug are fixedly connected through a plug spring terminal; when the power transformation and distribution drawer switch is pulled out, the male plug and the female plug of the secondary plug-in terminal are separated.

[0015] In an embodiment of the present application, the temperature acquisition module is connected to 24 temperature sensors for centralized acquisition and centralized control.

[0016] In an embodiment of the present application, the communication transmission device adopts a 485 communication collector.

[0017] In an embodiment of the present application, the 485 communication collector is a programmable controller; the 485 communication collector includes: a first programmable controller; the input end of the 485 communication collector is connected to the output end of the temperature acquisition device through an electrical signal; the output end of the 485 communication collector is connected to the control device through an electrical signal; the 485 communication collector can be connected in series; the 485 communication collector can be connected to the data of the temperature acquisition module in parallel.

[0018] In an embodiment of the present application, the 485 communication collector is used to collect the monitored temperature of the drawer switch and display it, and at the same time realize the temperature online monitoring function according to user needs; the temperature online monitoring function includes: any one or a combination of more than one of over-temperature warning, over-temperature alarm, historical temperature trend query, and alarm threshold setting functions.

[0019] In an embodiment of the present application, the control device includes: a touch screen and a second programmable controller; the second programmable controller includes: a first port and a second port; the second programmable controller is electrically connected to the communication transmission device through the first port; the second programmable controller is electrically connected to the touch screen through the second port; the input end of the second programmable controller is connected to the output end of the communication transmission device; the input end of the touch screen is connected to the output end of the second programmable controller; the touch screen is used to make a screen according to user needs, realize dynamic display of the temperature of all distribution drawer switch plug-in wires, and prompt different states of the temperature through the change of temperature display, and then set the alarm threshold and query the historical trend on the screen interface.

[0020] As described above, the temperature online monitoring system for a distribution drawer switch plug-in of the present application has the following beneficial effects:

[0021] (1) The on - line monitoring system provided by this application for the temperature of the drawer switch connector mainly uses a PT100 wired temperature sensor, which is connected to the temperature acquisition module through a secondary connector and conducts data interaction through a programmable controller. Secondly, this patent transmits through a limited electrical signal to realize the acquisition of temperature data, and can quickly replace the standby unit without powering off the bus after a fault occurs in the distribution drawer, without the need to remove the temperature sensor before withdrawing the drawer switch, and each drawer switch is movable and detachable. Wired temperature monitoring is more accurate than wireless temperature measurement, without data packet loss, and has high communication reliability;

[0022] (2) The on - line temperature monitoring system for the drawer switch connector of the distribution drawer provided by this application can replace manual measurement through automated monitoring, reducing the labor intensity of operation and maintenance personnel; through a centralized monitoring system, remote real - time dynamic monitoring in the central control room can be realized. At the same time, this application can avoid the electric shock risk during the manual measurement process; reduce equipment failures and safety accidents caused by overheating of cables, reduce maintenance costs and risks, and enhance the security of the system; and through the accumulation of historical data, formulate trend warning thresholds to achieve over - temperature warning, further improving the stability of the operation of power distribution and transformation equipment. Description of the Drawings

[0023] Figure 1 It shows the overall framework structure diagram of the on - line temperature monitoring system for the drawer switch connector of the distribution drawer described in the embodiment of this application.

[0024] Figure 2 It shows the structural composition architecture diagram of the on - line temperature monitoring system for the drawer switch connector of the distribution drawer described in the embodiment of this application.

[0025] Figure 3 It shows the device structure diagram of the on - line temperature monitoring system for the drawer switch connector of the distribution drawer described in the embodiment of this application in one embodiment.

[0026] Figure 4 It shows the connection diagram of the temperature sensor and the secondary connector of the on - line temperature monitoring system for the drawer switch connector of the distribution drawer described in the embodiment of this application in one embodiment.

[0027] Figure 5 It shows the wiring diagram of the temperature sensor of the on - line temperature monitoring system for the drawer switch connector of the distribution drawer described in the embodiment of this application in one embodiment.

[0028] Explanation of the Reference Numerals in the Drawings:

[0029] Serial Number Name

[0030] 1 On - line temperature monitoring system for the drawer switch connector of the distribution drawer

[0031] 11 Temperature sampling device

[0032] 111 One-time plug-in cable

[0033] 112 Temperature sensor

[0034] 113 Plug spring terminal

[0035] 12 Temperature acquisition device

[0036] 121 Secondary plug-in terminal block

[0037] 122 Temperature acquisition module

[0038] 1221 First communication terminal of the temperature acquisition module

[0039] 1222 Second communication terminal of the temperature acquisition module

[0040] 13 Communication transmission device

[0041] 131 485 communication collector (first programmable controller)

[0042] 1311 First port of the 485 communication collector

[0043] 1312 Second port of the 485 communication collector

[0044] 14 Control device

[0045] 141 Second programmable controller

[0046] 142 Touch screen

[0047] 1411 First port

[0048] 1412 Second port Specific implementation mode

[0049] The following further describes the present application in conjunction with the accompanying drawings, but the protection scope of the present application is not limited to the following description.

[0050] The following illustrates the implementation mode of the present application through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation modes. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0051] It should be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present application. Therefore, only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The types, quantities, and proportions of the components in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0052] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope for the implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope within which the present utility model can be implemented.

[0053] The on-line temperature monitoring system for the plug-in connectors of the distribution drawer switch provided in the following embodiments of the present application solves the technical problem of potential safety hazards caused by overheating of cables during the operation of power distribution and transformation equipment in the existing power distribution and transformation monitoring technologies.

[0054] The embodiments of the present application provide an on-line temperature monitoring system for the plug-in connectors of the distribution drawer switch. Using PT100 wired temperature sensors, they are connected to the temperature acquisition module through secondary plug-in connectors and data interaction is carried out through a programmable controller. Secondly, this patent transmits through limited electrical signals to realize the acquisition of temperature data, and can quickly replace the standby unit without power interruption of the bus after a fault occurs in the distribution drawer switch, without the need to disassemble the temperature sensor and then withdraw the drawer switch. Each drawer switch is movable and detachable. Wired temperature monitoring is more accurate than wireless temperature measurement, without data packet loss phenomenon, and has high communication reliability.

[0055] The following will elaborate in detail the implementation manner of the principle of an on-line temperature monitoring system for the plug-in connectors of the distribution drawer switch in this embodiment, so that those skilled in the art can understand the on-line temperature monitoring system for the plug-in connectors of the distribution drawer switch in this embodiment without creative labor.

[0056] Please refer to Figure 1 , which shows the overall framework structure diagram of the on-line temperature monitoring system for the plug-in connectors of the distribution drawer switch described in the embodiments of the present application. As Figure 1As shown in the figure, the on-line temperature monitoring system 1 for the distribution drawer switch plug-in includes: a temperature sampling device 11, a temperature acquisition device 12, a communication transmission device 13, and a control device 14. Among them, the temperature sampling device 11 is used to extract the temperature of the distribution drawer switch plug-in through a temperature sensing device; the temperature acquisition device 12 is electrically connected to the temperature sampling device 11 and is used to receive the temperature sample data extracted by the temperature sampling device; the control device 14 is used to operate through a touch screen and dynamically and real-time display the temperature display, control, and alarm of all distribution drawer switch wiring, and query the historical trend; the communication transmission device 13 is electrically connected to the temperature acquisition device 12 and the control device 14 respectively, and is used to receive and transmit the data collected by the temperature acquisition device 12 and transmit it to the control device 14 for display and control. The on-line temperature monitoring system 1 for the distribution drawer switch plug-in is used to detect the cable plug-in in the power distribution and transformation switch.

[0057] Please refer to Figures 2 to 4 , which are respectively the schematic diagram of the structural composition framework of the on-line temperature monitoring system for the distribution drawer switch plug-in according to the embodiment of the present application, the schematic diagram of the device structure in an embodiment of the on-line temperature monitoring system for the distribution drawer switch plug-in according to the embodiment of the present application, and the schematic diagram of the connection between the temperature sensor and the secondary plug-in in an embodiment of the on-line temperature monitoring system for the distribution drawer switch plug-in according to the embodiment of the present application.

[0058] The temperature sampling device 11 includes: a primary plug-in cable 111, a temperature sensor 112, and a plug spring terminal 113. Among them, the output end of the primary plug-in cable 111 is electrically connected to the input end of the temperature sensor 112; the output end of the temperature sensor 112 is fixedly connected to the input end of the plug spring terminal 113; the output end of the plug spring terminal 113 is electrically connected to the input end of the temperature acquisition device 12.

[0059] In this embodiment, the temperature sensor includes a contact type temperature sensor. The temperature sensor is made of resin material. The temperature sensor uses high-voltage tape and thermal conductive silicone to bundle and fix the three-phase primary plug-in cable; the temperature that the temperature sensor can withstand is greater than or equal to -40°C and less than or equal to 200°C.

[0060] Specifically, the temperature sensor is a contact type temperature sensor. In order to ensure that the insulation of the temperature sensor can meet the operation requirements when the temperature is too high, the temperature sensor is made of resin material, can withstand a temperature of -40°C to 200°C, and uses high-voltage tape and thermal conductive silicone to bundle and fix the three-phase primary plug-in cable 1.

[0061] Please continue to refer to Figure 2 andFigure 3 。

[0062] The temperature acquisition device 12 includes: a secondary plug-in terminal block 121 and a temperature acquisition module 122. Among them, the input end of the secondary plug-in terminal block 121 is connected to the output end of the temperature sampling device 11; the output end of the temperature acquisition module 122 is connected to the input end of the communication transmission device 13.

[0063] The secondary plug-in terminal block 121 is of a plug-in type.

[0064] The secondary plug-in terminal block 121 includes: a male plug and a female plug; the male plug and the female plug are fixedly connected through a spring terminal.

[0065] When the power distribution drawer switch is pulled out, the male plug and the female plug of the secondary plug-in terminal are separated.

[0066] In this embodiment, the temperature acquisition module is connected to 122 temperature sensors for centralized acquisition and centralized control.

[0067] Specifically, it is preferably to use the plug-in secondary plug-in terminal block 121. The secondary plug-in terminal block 121 is divided into: a male plug and a female plug. When the drawer switch is pulled out, the male and female plugs of the secondary plug-in terminal are separated. Its connection is fixed through a spring terminal, which can simply and effectively ensure the maintenance of the drawer switch during the power distribution operation without affecting the temperature monitoring of other drawer switches.

[0068] Please refer to Figure 5 , which shows the wiring diagram of the temperature sensor in an embodiment of the on-line temperature monitoring system for the plug-in part of the power distribution drawer switch described in the embodiment of the present application.

[0069] For example, each drawer switch has a primary plug-in cable 1, and each temperature acquisition module can acquire 8 drawer switches. The temperature acquisition module preferably uses the Ankerui ART-24 which can be connected to 24 temperature sensors. Compared with directly connecting to a programmable controller, it can reduce the use of PLC analog modules, facilitate centralized acquisition and centralized control, and reduce the operation of the programmable controller.

[0070] Please continue to refer to Figures 2 to 5 。

[0071] The communication transmission device 13 uses a 485 communication collector. The 485 communication collector uses a programmable controller.

[0072] The 485 communication collector includes: a first programmable controller. The input end of the 485 communication collector is connected to the output end of the temperature acquisition device through an electrical signal; the output end of the 485 communication collector is connected to the control device through an electrical signal. The 485 communication collector can be connected in series; the 485 communication collector can be connected to the data of the temperature acquisition module in parallel.

[0073] In this embodiment, the 485 communication collector is used to collect the monitored temperature of the drawer switch, display it, and at the same time implement the temperature online monitoring function according to user requirements. Among them, the temperature online monitoring function includes but is not limited to: over-temperature warning, over-temperature alarm, historical temperature trend query, alarm threshold setting and other functions.

[0074] The control device 14 includes: a touch screen 142 and a second programmable controller 141. Among them, the second programmable controller 141 includes: a first port and a second port.

[0075] The second programmable controller 141 is electrically connected to the communication transmission device through the first port; the second programmable controller 141 is electrically connected to the touch screen 142 through the second port; the input end of the second programmable controller 141 is connected to the output end of the communication transmission device 13.

[0076] For example, the first port of the second programmable controller 141 is connected to the output end of the 485 communication collector (i.e., the first programmable controller), and the second port of the second programmable controller 141 is connected to the touch screen 142 to control the touch screen 142 to perform control and query operations.

[0077] In this embodiment, the input end of the touch screen 142 is connected to the output end of the second programmable controller 141; the touch screen 142 is used to make a screen according to user requirements, realize the dynamic display of the temperature of all distribution drawer switch patch cords, and prompt different states of the temperature through the change of the temperature display, and then set the alarm threshold, and query the historical trend in the screen interface.

[0078] In this embodiment, it is preferred that the second programmable logic controller 141 is a Siemens 200smart. Among them, an SB CM01 (RS485 / RS232) communication board is added. The interface of this communication board is connected to a 485 communication collector. The 485 communication collector preferably used is the UT-5104 of Yutai, which can collect 4 temperature acquisition modules in parallel. The communication of the temperature acquisition module 122 used for the drawer switch of each transformer adopts the 485 daisy-chain connection method. Between the transformers in each substation, they are connected in parallel to the 485 communication collector. If the number of acquisition modules is large, the 485 communication collector can be connected to the PLC in a head-to-tail series connection method.

[0079] Specifically, the second programmable logic controller 141 can, through pre-programming, realize the acquisition of temperature sensors, as well as the acquisition, archiving, storage, processing, and threshold calculation of temperature measurement data. At the same time, a corresponding program can be set in the second programmable logic controller 141 to automatically compare and monitor the temperature with the set threshold in a cyclic polling manner. Preferably, relevant parameter standard reference values can also be set in the second programmable logic controller 141, and the directly measured temperature data and the calculated data are compared with the standard reference value for anomaly judgment. When the data result is close to the standard reference, it will automatically prompt the operation and maintenance personnel to pay attention to the operation status of the distribution drawer switch. When the value exceeds the standard reference, an alarm will be issued to alert the operator to handle it. The port of the second programmable logic controller 141 is communicatively connected to the touch screen. The touch screen 142 used is the TPC1021Et of MCGS. This touch screen 142 can be connected to the second programmable logic controller 141 by using the TCP / IP or RS485 communication method. Among them, an interface program can also be set in the second programmable logic controller 141 to achieve interconnection and interoperability with the existing energy management platform.

[0080] In this embodiment, through the screen production of the touch screen 142, it is possible to dynamically and real-time display the temperatures of all distribution drawer switch plug wires, be able to identify over-temperature warnings and alarms of the temperature through the change of the temperature display font color, prompt through a dialogue prompt box, be able to set the alarm threshold on the touch screen 142, and be able to query the historical trend in the interface of the touch screen 142.

[0081] The following takes the online monitoring system of the temperature of the cable of the distribution drawer switch plug-in as an example for illustration.

[0082] In this embodiment, the on-line temperature monitoring system for the distribution drawer switch connector includes: a primary plug-in cable, a temperature sensor, a plug spring terminal, a secondary plug-in terminal block, a temperature acquisition module, a 485 communication collector (the first programmable controller), a second programmable controller, and a touch screen. Among them, the temperature measurement end of the temperature sensor is fixedly connected to the primary plug-in cable, and the other end is fixedly connected to the plug spring terminal. The plug spring terminal is connected to the secondary plug-in terminal block. The outgoing line end of the plug-in terminal block is connected to the temperature acquisition module. The communication terminals 485A and 485B of the temperature acquisition module are respectively connected to 485A and 485B of the 485 communication collector. The communication collector is connected to the programmable controller port. The programmable controller and the touch screen are connected through the programmable controller port.

[0083] Further, the temperature sensor is a contact type temperature sensor. In order to ensure that the insulation of the temperature sensor can meet the operation requirements when the temperature is too high, the temperature sensor is made of resin material, can withstand temperatures from -40°C to 200°C, and the three-phase primary plug-in cable is bundled and fixed using high-voltage tape and thermal conductive silicone.

[0084] The secondary plug-in terminal block is of the plug-in type and is divided into a male head and a female head. When the drawer switch is pulled out, the male head and the female head of the secondary plug-in terminal are separated. Its connection is fixed through the plug spring terminal, which can simply and effectively ensure the maintenance of the drawer switch during the distribution operation process without affecting the temperature monitoring of other drawer switches.

[0085] The temperature acquisition module can connect 24 temperature sensors. Compared with directly accessing the programmable controller, it can reduce the use of the PLC analog quantity module, facilitate centralized acquisition and centralized control, and reduce the operation of the programmable controller.

[0086] The 485 communication collector serves as a medium for the communication between the programmable controller and the temperature acquisition module, playing the roles of signal regeneration, shaping, amplification, optimizing the network wiring structure, and fault isolation. Multiple temperature acquisition modules can be connected to the 485 communication collector in a daisy-chain manner or in a parallel connection manner.

[0087] The second programmable controller can collect the monitored temperature of the drawer switch and display it on the touch screen. The programmable controller can realize functions such as over-temperature warning, over-temperature alarm, historical temperature trend query, and alarm threshold setting through programming.

[0088] Finally, through the screen production of the touch screen, it is possible to dynamically and real-time display the temperatures of all the distribution drawer switch patch cords, identify over-temperature warnings and alarms of the temperature through the change of the temperature display font color, prompt through a dialogue prompt box, set the alarm threshold on the touch screen, and query the historical trend in the touch screen interface.

[0089] In summary, the on-line temperature monitoring system for the distribution drawer switch plug-in of the present application uses a PT100 wired temperature sensor, which is connected to the temperature acquisition module through a secondary plug-in, and data interaction is carried out through a programmable controller. Secondly, this patent transmits through a limited electrical signal to realize the acquisition of temperature data, and can quickly replace the standby unit without power-off of the bus after a failure of the variable distribution drawer, without the need to remove the temperature sensor and then withdraw the drawer switch. Each drawer switch is movable and detachable. Wired temperature monitoring is more accurate than wireless temperature measurement, without data packet loss, and has high communication reliability. The present application can replace manual measurement through automatic monitoring, reducing the labor intensity of operation and maintenance personnel; through a centralized monitoring system, remote real-time dynamic monitoring in the central control room can be realized. At the same time, the present application can avoid the electric shock risk in the manual measurement process; reduce equipment failures and safety accidents caused by overheating of cables, reduce maintenance costs and risks, enhance the safety of the system; and through the accumulation of historical data, formulate trend warning thresholds to realize over-temperature warning, further improving the operation stability of the variable distribution equipment. At the same time, this device has strong versatility, a wide range of applications, and high practical value.

[0090] The above embodiments only illustrate the principle and its effects of the present application, rather than limiting the present application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present application should still be covered by the claims of the present application.

Claims

1. An on-line temperature monitoring system for a distribution drawer switch plug-in part, which is used to detect the cable plug-in part in a power transformation and distribution switch, is characterized in that, The system includes: a temperature sampling device, a temperature acquisition device, a communication transmission device, and a control device; The temperature sampling device is used to extract the temperature of the plug-in connector of the distribution drawer switch through a temperature sensing device; The temperature acquisition device is electrically connected to the temperature sampling device and is used to receive the temperature sample data extracted by the temperature sampling device; The control device is used to operate through a touch screen and perform dynamic real-time display of the temperature display, control, and alarm of all distribution drawer switch wiring, as well as query the historical trend; The communication transmission device is electrically connected to the temperature acquisition device and the control device respectively, and is used to receive and transmit the data collected by the temperature acquisition device and transmit it to the control device for display and control.

2. The on-line temperature monitoring system for the plug-in connection of the distribution drawer switch according to claim 1, characterized in that The temperature sampling device includes: a primary plug-in cable, a temperature sensor, and a plug spring terminal; The output end of the primary plug-in cable is electrically connected to the input end of the temperature sensor; The output end of the temperature sensor is fixedly connected to the input end of the plug spring terminal; The output end of the plug spring terminal is electrically connected to the input end of the temperature acquisition device.

3. The on-line temperature monitoring system for the plug-in connection of the distribution drawer switch according to claim 2, characterized in that, The temperature sensor includes a contact type temperature sensor; The temperature sensor is made of resin material; The temperature sensor uses a high-voltage tape and thermal conductive silicone to bundle and fix the three-phase primary plug-in cable; The temperature that the temperature sensor can withstand is greater than or equal to -40°C and less than or equal to 200°C.

4. The on-line temperature monitoring system for the power distribution drawer switch plug-in connector according to claim 1, characterized in that, The temperature acquisition device includes: a secondary plug-in terminal block and a temperature acquisition module; The input end of the secondary plug-in terminal block is connected to the output end of the temperature sampling device; The output end of the temperature acquisition module is connected to the input end of the communication transmission device.

5. The on-line temperature monitoring system for the plug-in connection of the distribution drawer switch according to claim 4, characterized in that, The secondary plug-in terminal block is of a plug-in type; The secondary plug-in terminal block includes: a male plug and a female plug; The male plug and the female plug are fixedly connected through a plug spring terminal; When the distribution and transformation drawer switch is pulled out, the male plug and the female plug of the secondary plug-in terminal are separated.

6. The on-line temperature monitoring system for the plug-in of the distribution drawer switch according to claim 4, wherein The temperature acquisition module is connected to 24 temperature sensors for centralized acquisition and centralized control.

7. The on-line temperature monitoring system for the plug-in connection of the distribution drawer switch according to claim 1, wherein The communication transmission device uses a 485 communication collector.

8. The on-line temperature monitoring system for the plug-in connection of the distribution drawer switch according to claim 7, characterized in that, The 485 communication collector is a programmable controller; The 485 communication collector includes: a first programmable controller; The input end of the 485 communication collector is electrically connected to the output end of the temperature acquisition device; The output end of the 485 communication collector is electrically connected to the control device; The 485 communication collector can be connected in series; The 485 communication collector can be connected to the data of the temperature acquisition module in parallel.

9. The on-line temperature monitoring system for the plug-in part of the distribution drawer switch according to claim 7, characterized in that, The 485 communication collector is used to collect and display the monitored temperature of the drawer switch, and at the same time realize the temperature online monitoring function according to user needs; The temperature online monitoring function includes: any one or a combination of functions such as over-temperature early warning, over-temperature alarm, historical temperature trend query, and alarm threshold setting.

10. The on-line temperature monitoring system for the plug-in part of the distribution drawer switch according to claim 1, characterized in that, The control device includes: a touch screen and a second programmable controller; The second programmable logic controller includes: a first port and a second port; The second programmable logic controller is electrically connected to the communication transmission device through the first port; The second programmable logic controller is electrically connected to the touch screen through the second port; The input end of the second programmable logic controller is connected to the output end of the communication transmission device; The input end of the touch screen is connected to the output end of the second programmable logic controller; The touch screen is used to produce a screen according to user requirements, dynamically display the temperatures of all distribution drawer switch patch cords, identify different temperature states through changes in temperature display for prompting, further set alarm thresholds, and query historical trends in the screen interface.

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