Measurement and control devices and electrical cabinets

Abstract

The present application provides a measurement and control device and an electrical cabinet for data monitoring and control of an electric power system. The measurement and control device includes: a human-machine interaction unit, a voltage protection unit, a current protection unit, and a circuit breaker state detection control unit, wherein the human-machine interaction unit, the voltage protection unit, the current protection unit, and the circuit breaker state detection control unit are connected via a bus. The present solution functionally splits the detection and control elements, integrates the corresponding functional devices nearby to form an integrated functional unit, and then realizes information sharing and communication between different integrated functional units via a bus, thereby making it simple to install and wire the devices in a single integrated functional unit nearby, and making it simple to wire different integrated functional units via a bus connection, thereby solving the problem of complex and redundant lines of current high-voltage power distribution devices, saving the cost of line materials, and having the advantages of low carbonization and easy installation.

Description

Technical Field

[0001] The present application relates to the technical field of power supply and distribution, and in particular to a measurement and control device and an electrical cabinet. Background Art

[0002] In recent years, green and low-carbon have become the mainstream, and in the current high-voltage distribution devices of the power supply and distribution system, the devices that cooperate with each other in detection and control are separated, which makes the wiring span of the separated devices large and the wiring is messy. For example, the current transformer is currently set in the cable room of the electrical cabinet, and the protection device is set on the cabinet door. The wiring of the current transformer and the protection device needs to cross the circuit breaker room and the instrument room, which makes the wiring span between the devices large and the wiring is messy and cumbersome, making the lines in the high-voltage distribution device complex and redundant. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a measurement and control device and an electrical cabinet to solve the problems of large wiring spans between components and messy and cumbersome wiring caused by the separate settings of components that cooperate with each other in the current high-voltage power distribution device, which results in complex and redundant lines.

[0004] In a first aspect, the present invention provides a measurement and control device for monitoring and controlling data of an electric power system, comprising: a human-computer interaction unit, a voltage protection unit, a current protection unit, and a circuit breaker state detection control unit, wherein the human-computer interaction unit, the voltage protection unit, the current protection unit, and the circuit breaker state detection control unit are connected via a bus; the voltage protection unit is used to monitor the voltage data of the electric power system, determine whether to perform voltage protection based on the monitored voltage data, and synchronize the monitored voltage data to other components via the bus; the current protection unit is used to monitor the current data of the electric power system, determine whether to perform voltage protection based on the monitored voltage data, and synchronize the monitored voltage data to other components via the bus; The current data determines whether to perform current protection, and synchronizes the monitored current data to other components through the bus; the circuit breaker status detection control unit is used to monitor the circuit breaker and / or isolation trolley status of the power system, and determines whether to open and close the circuit breaker and / or isolation trolley based on the circuit breaker and / or isolation trolley status, and synchronizes the circuit breaker and / or isolation trolley status to other components through the bus; the human-computer interaction unit is used to receive the monitoring data synchronized by other components through the bus, and display the received monitoring data and receive operation information, and issue corresponding operation instructions to the corresponding components through the bus based on the operation information.

[0005] The measurement and control device designed as above, this scheme will split the detection and control elements into functions, integrate the corresponding functional devices nearby to form integrated functional units, such as voltage protection units, current protection units, etc., and then realize information sharing and communication between different integrated functional units through buses, so that the devices in a single integrated functional unit can be installed nearby and the wiring is simple, and the wiring between different integrated functional units is simple through bus connection, thereby solving the problem of complex and redundant lines of current high-voltage distribution devices, thereby saving the cost of line materials and having the advantages of low carbonization and easy installation.

[0006] In an optional implementation of the first aspect, the voltage protection unit includes a voltage controller, a first bus communication element and a first analog-to-digital conversion element, the voltage controller is connected to the bus through the first bus communication element, and the voltage controller is connected to the first analog-to-digital conversion element; the first analog-to-digital conversion element is used to connect to a voltage detection device of the power system to perform analog-to-digital conversion on the voltage data detected by the voltage detection device and transmit it to the voltage controller; the voltage controller is used to determine whether to perform voltage protection based on the voltage data after the analog-to-digital conversion, and synchronize the voltage data after the analog-to-digital conversion with other components connected to the bus through the first bus communication element.

[0007] In an optional implementation of the first aspect, the current protection unit includes a current controller, a second bus communication element and a second analog-to-digital conversion element, the current controller is connected to the bus through the second bus communication element, and the current controller is connected to the second analog-to-digital conversion element; the second analog-to-digital conversion element is used to connect to a current detection device of the power system to perform analog-to-digital conversion on the current data detected by the current detection device and transmit it to the current controller; the current controller is used to determine whether to perform current protection based on the current data after analog-to-digital conversion, and synchronize the current data after analog-to-digital conversion with other components connected to the bus through the second bus communication element.

[0008] In an optional implementation of the first aspect, the circuit breaker state detection control unit includes a circuit breaker controller, a third bus communication element, a switch input element and a switch output element, the circuit breaker controller is connected to the bus through the third bus communication element, and the circuit breaker controller is connected to the circuit breaker and / or the isolating trolley of the power system through the switch input element and the switch output element; the circuit breaker controller is used to detect the state of the circuit breaker and / or the isolating trolley through the switch input element, and synchronize the state of the circuit breaker and / or the isolating trolley with other components connected to the bus through the third bus communication element; and when receiving a closing and opening command, the circuit breaker and / or the isolating trolley is driven through the switch output element to disconnect the circuit breaker or the isolating trolley.

[0009] In an optional implementation of the first aspect, the human-computer interaction unit includes a human-computer interaction controller, a fourth bus communication element, a display screen element and an operating element, the human-computer interaction controller is connected to the bus via the fourth bus communication element, and the human-computer interaction controller is respectively connected to the display screen element and the operating element; the human-computer interaction controller is used to receive monitoring data synchronized by other components through the bus via the fourth bus communication element, and display the monitoring data through the display screen element; and is also used to receive operation information through the operating element, and issue corresponding operation instructions to corresponding components through the bus based on the operation information.

[0010] In the implementation method of the above design, the voltage protection unit, current protection unit, circuit breaker state detection control unit and human-computer interaction unit designed in this scheme are each independently designed with a controller, so that each functional unit can perform its respective duties and their respective data can be processed by distributed computing, thereby improving data monitoring and control efficiency.

[0011] In an optional implementation of the first aspect, at least one of the voltage protection unit and the current protection unit is connected to the circuit breaker of the power system via a circuit breaker control signal line to send a control signal to the circuit breaker when the monitoring data is abnormal.

[0012] In an optional implementation of the first aspect, the circuit breaker control signal line includes multiple circuit breaker control signal lines, and the multiple circuit breaker control signal lines respectively transmit a circuit breaker opening control signal, a circuit breaker closing control signal, a circuit breaker opening status signal, and a circuit breaker closing status signal.

[0013] In an optional implementation of the first aspect, at least one of the voltage protection unit and the current protection unit is connected to the isolation trolley of the power system through an isolation trolley control signal line to send a control signal to the isolation trolley when the monitoring data is abnormal.

[0014] In an optional implementation of the first aspect, the isolation trolley control signal line includes a plurality of isolation trolley control signal lines, and the plurality of isolation trolley control signal lines respectively transmit the isolation trolley experimental position signal and the isolation trolley working position signal.

[0015] The implementation method of the above design is to design a special circuit breaker control signal line / isolation trolley control signal line between the current protection unit and the voltage protection unit and the circuit breaker, so that in the case of abnormal current / voltage, the current protection unit and the voltage protection unit can directly control the circuit breaker / isolation trolley, thereby reducing the delay in handling abnormal situations and achieving timeliness of protection.

[0016] In a second aspect, the present invention provides an electrical cabinet, comprising an electrical cabinet body and a measurement and control device described in any one of the aforementioned embodiments, the electrical cabinet body comprising a cabinet body and a cabinet door connected to the cabinet body, the cabinet body comprising an instrument room, a circuit breaker room and a cable room, the circuit breaker room is arranged above the cable room, and the instrument room is arranged above the circuit breaker room; the human-computer interaction unit is arranged on the cabinet door, the voltage protection unit is arranged in the instrument room, the circuit breaker state detection control unit is arranged in the circuit breaker room, and the current protection unit is arranged in the cable room.

[0017] The electrical cabinet designed as above includes the measurement and control device of the first aspect. Therefore, different integrated functional units of the designed electrical cabinet realize information sharing and communication between different integrated units through a bus, so that the connection between devices does not need to cross other device rooms, thereby solving the current problem of complex and redundant lines in electrical cabinets, thereby saving the cost of line materials and having the advantages of low carbonization and easy installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A first structural diagram of the measurement and control device provided in an embodiment of the present application;

[0020] Figure 2 A first structural schematic diagram of a voltage protection unit provided in an embodiment of the present application;

[0021] Figure 3 A second structural schematic diagram of a voltage protection unit provided in an embodiment of the present application;

[0022] Figure 4 A first structural schematic diagram of a current protection unit provided in an embodiment of the present application;

[0023] Figure 5 A second structural schematic diagram of a current protection unit provided in an embodiment of the present application;

[0024] Figure 6 This is a first structural schematic diagram of a circuit breaker state detection control unit according to an embodiment of the present application;

[0025] Figure 7 A second structural schematic diagram of a circuit breaker state detection control unit according to an embodiment of the present application;

[0026] Figure 8 A schematic diagram of the structure of a human-computer interaction unit provided in an embodiment of the present application;

[0027] Fig. 9 A second structural diagram of the measurement and control device provided in an embodiment of the present application;

[0028] Fig.10 A schematic diagram of the structure of an electrical cabinet provided in an embodiment of the present application.

[0029] Icons: 1-electrical cabinet; 2-electrical cabinet body; 3-measurement and control device; 4-cabinet; 5-cabinet door; 6-instrument room; 7-circuit breaker room; 8-cable room; A-circuit breaker; CAN-bus; 10-human-machine interaction unit; 110-human-machine interaction controller; 120-fourth bus communication element; 130-display element; 140-operating element; 20-voltage protection unit; 210-voltage controller; 220-first bus communication element; 230-first analog-to-digital conversion element; 30-current protection unit; 310-current controller; 320-second bus communication element; 330-first Two analog-to-digital conversion elements; 40-circuit breaker state detection control unit; 410-circuit breaker controller; 420-third bus communication element; 430-switch input element; 4310-isolation trolley position input; 4320-circuit breaker state input; 440-switch output element; 4410-circuit breaker closing control relay; 4420-circuit breaker opening control relay; 4430-isolation trolley experimental position relay; 4440-isolation trolley working position relay; 50-circuit breaker control signal line; 50a-first circuit breaker control signal line; 50b-second circuit breaker control signal line. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0031] The present application provides a measurement and control device, which can be used to monitor and control data of a power system. Figure 1 As shown, the measurement and control device includes a human-machine interaction unit 10, a voltage protection unit 20, a current protection unit 30 and a circuit breaker state detection control unit 40, and the human-machine interaction unit 10, the voltage protection unit 20, the current protection unit 30 and the circuit breaker state detection control unit 40 are connected via a bus CAN.

[0032] In the measurement and control device designed as above, the voltage protection unit 20 is used to monitor the voltage data of the power system, determine whether to perform voltage protection based on the monitored voltage data, and synchronize the monitored voltage data to other components through the bus CAN. For example, the voltage protection unit 20 can receive the secondary side voltage of the power system converted by the voltage transformer for monitoring and protection.

[0033] The current protection unit 30 is used to detect the current data of the power system, and determine whether to perform current protection based on the monitored current data, and synchronize the monitored current data to other components through the bus CAN. For example, the current protection unit 30 can detect the three-phase current data of the power system and perform corresponding three-phase current protection.

[0034] The circuit breaker status detection control unit 40 is used to monitor the status of the circuit breaker and / or the isolation trolley of the power system, and determine whether to open and close the circuit breaker and / or the isolation trolley based on the status of the circuit breaker and / or the isolation trolley, and synchronize the status of the circuit breaker and / or the isolation trolley to other components through the bus CAN; the human-computer interaction unit 10 is used to receive the monitoring data synchronized by other components through the bus CAN, and display the received monitoring data and receive operation information, and send corresponding operation instructions to the corresponding components through the bus CAN based on the operation information. For example, the human-computer interaction unit 10 displays the voltage data monitored by the voltage protection unit 20.

[0035] The measurement and control device designed as above, this scheme will split the detection and control elements into functions, integrate the corresponding functional devices nearby to form integrated functional units, for example, voltage protection unit 20, current protection unit 30, etc., and then realize information sharing and communication between different integrated functional units through bus CAN, so that the devices in a single integrated functional unit are installed nearby and the wiring is simple, and the wiring between different integrated functional units is simple through bus CAN, thereby solving the problem of complex and redundant lines of current high-voltage distribution devices, thereby saving the cost of line materials and having the advantages of low carbonization and easy installation.

[0036] In an optional implementation of this embodiment, if Figure 2 As shown, the voltage protection unit 20 includes a voltage controller 210 , a first bus communication element 220 and a first analog-to-digital conversion element 230 . The voltage controller 210 is connected to the bus CAN via the first bus communication element 220 , and the voltage controller 210 is connected to the first analog-to-digital conversion element 230 .

[0037] In the voltage protection unit 20 designed as above, the first analog-to-digital conversion element 230 is used to connect with the voltage detection device of the power system to perform analog-to-digital conversion on the voltage data detected by the voltage detection device and transmit it to the voltage controller 210, wherein the voltage detection device can be a voltage mutual inductance device; the voltage controller 210 determines whether to perform voltage protection based on the voltage data after the analog-to-digital conversion, and synchronizes the voltage data after the analog-to-digital conversion with other components connected to the bus CAN through the first bus communication element 220.

[0038] Specifically, Figure 3 As shown, the voltage protection unit 20 can be connected to the A-phase voltage terminal, B-phase voltage terminal, C-phase voltage terminal and zero-sequence voltage terminal of the voltage transformer device, so that the voltage protection unit 20 can be connected to the corresponding voltage transformer device to realize the monitoring of the secondary side voltage data of each phase converted by the voltage transformer device.

[0039] In an optional implementation of this embodiment, if Figure 4 As shown, the current protection unit 30 includes a current controller 310 , a second bus communication element 320 and a second analog-to-digital conversion element 330 . The current controller 310 is connected to the bus CAN via the second bus communication element 320 , and the current controller 310 is connected to the second analog-to-digital conversion element 330 .

[0040] The second analog-to-digital conversion element 330 is used to connect to the current detection device of the power system to perform analog-to-digital conversion on the current data detected by the current detection device and transmit it to the current controller 310; the current controller is used to determine whether to perform current protection based on the current data after the analog-to-digital conversion, and synchronize the analog-to-digital converted current data with other components connected to the bus CAN through the second bus communication element.

[0041] Specifically, Figure 5 As shown, the current controller 310 can be connected to the A-phase current measuring terminal, the B-phase current measuring terminal, the C-phase current measuring terminal, the A-phase protection current terminal, the B-phase protection current terminal, the C-phase protection current terminal, and the zero-sequence protection current terminal of the current detection device through the second analog-to-digital conversion element 330, so as to receive the current data detected by the current detection device and perform analog-to-digital conversion and realize corresponding protection control; in addition, the current controller 310 can also be connected to the grounding knife status input to realize grounding knife status monitoring; it can also be connected to the grounding knife control interface to realize the switch control of the grounding knife.

[0042] In an optional implementation of this embodiment, if Figure 6As shown, the circuit breaker state detection control unit 40 includes a circuit breaker controller 410, a third bus communication element 420, a switch input element 430 and a switch output element 440. The circuit breaker controller 410 is connected to the bus CAN through the third bus communication element 420, and the circuit breaker controller 410 is connected to the circuit breaker of the power system through the switch input element 430 and the switch output element 440.

[0043] The circuit breaker state detection control unit 40 designed above, the circuit breaker controller 410 detects the state of the circuit breaker and / or the isolating trolley through the switch input element 430, and synchronizes the state of the circuit breaker and / or the isolating trolley with other components connected to the bus CAN through the third bus communication element 420; and when receiving the opening and closing command, the circuit breaker and / or the isolating trolley is driven through the switch output element 440 to disconnect the circuit breaker or the isolating trolley.

[0044] Specifically, Figure 7 As shown, the switch input element 430 may include an isolation trolley position input 4310 and a circuit breaker status input 4320, wherein the circuit breaker controller 410 can detect the current state of the isolation trolley through the isolation trolley position input 4310, and can detect the current state of the circuit breaker through the circuit breaker status input 4320.

[0045] The switch output element 440 may include a circuit breaker closing control relay 4410, a circuit breaker opening control relay 4420, an isolation trolley experimental position relay 4430 and an isolation trolley working position relay 4440, wherein the circuit breaker controller 410 may control the circuit breaker to close by controlling the circuit breaker closing control relay 4410 after receiving the circuit breaker closing signal, thereby connecting the power system; the circuit breaker controller 410 may control the circuit breaker to open by controlling the circuit breaker opening control relay 4420 after receiving the circuit breaker opening signal, thereby isolating the power system; similarly, when the circuit breaker controller 410 receives the isolation trolley experimental position signal, it may control the isolation trolley to be in the experimental position by the isolation trolley experimental position relay 4430, thereby connecting the power system; when the circuit breaker controller 410 receives the isolation trolley working position signal, it may control the isolation trolley to be in the working position by the isolation trolley working position relay 4440, thereby isolating the power system.

[0046] In an optional implementation of this embodiment, if Figure 8 As shown, the human-computer interaction unit 10 includes a human-computer interaction controller 110, a fourth bus communication element 120, a display screen element 130 and an operating element 140. The human-computer interaction controller 110 is connected to the bus CAN via the fourth bus communication element 120, and the human-computer interaction controller 110 is connected to the display screen element 130 and the operating element 140 respectively.

[0047] In the human-computer interaction unit 10 designed as above, the human-computer interaction controller 110 receives the monitoring data synchronized by other components through the bus CAN through the fourth bus communication element 120, displays the monitoring data through the display screen element 130, and receives operation information through the operating element 140, and sends corresponding operation instructions to the corresponding components through the bus CAN based on the operation information.

[0048] Specifically, the human-computer interaction controller 110 can be connected to the circuit breaker controller via the RS485 communication interface, so as to receive the circuit breaker opening and closing operations performed by the user on the operating element 140, and then send the circuit breaker opening and closing signals to the circuit breaker controller 410 through the RS485 communication interface, so that the circuit breaker controller 410 controls the circuit breaker according to the corresponding opening and closing signals to achieve the corresponding opening and closing actions.

[0049] In an optional implementation of this embodiment, at least one of the voltage protection unit 20 and the current protection unit 30 is connected to the circuit breaker A through a circuit breaker control signal line 50 to send a control signal to the circuit breaker when the monitoring data is abnormal. The circuit breaker control signal line 50 may include a plurality of circuit breaker control signal lines 50, and the plurality of circuit breaker control signal lines 50 respectively transmit a circuit breaker opening control signal, a circuit breaker closing control signal, a circuit breaker opening state signal, and a circuit breaker closing state signal.

[0050] For example, Fig. 9 As shown, the current protection unit 30 is connected to the circuit breaker A through two circuit breaker control signal lines 50, wherein a first circuit breaker control signal line 50a transmits a circuit breaker opening control signal, and another second circuit breaker control signal line 50b transmits a circuit breaker closing control signal. When the current protection unit 30 detects that a current fault occurs, the circuit breaker opening control signal can be transmitted through the first circuit breaker control signal line 50a, thereby directly controlling the circuit breaker A to achieve timely protection. After the fault is cut off, the current protection unit 30 can transmit the circuit breaker closing control signal through the second circuit breaker control signal line 50b, thereby promptly restoring access to the power system. Similarly, the voltage protection unit 20 can also directly control the circuit breaker in the case of voltage anomaly and voltage anomaly recovery.

[0051] In the above-mentioned embodiment, this scheme designs a special circuit breaker control signal line between the current protection unit and the voltage protection unit and the circuit breaker, so that in the case of abnormal current / voltage, the current protection unit and the voltage protection unit can directly control the opening and closing of the circuit breaker, thereby reducing the opening and closing delay of the circuit breaker in abnormal conditions, thereby achieving timeliness of protection.

[0052] Similarly, this solution can also be connected to the isolation trolley through the isolation trolley control signal line in the voltage protection unit 20 and the current protection unit 30, so as to send a control signal to the isolation trolley in time under abnormal circumstances to achieve timely protection.

[0053] Second embodiment

[0054] like Fig.10 As shown, the present solution provides an electrical cabinet 1, which includes an electrical cabinet body 2 and a measurement and control device 3 shown in any optional implementation manner in the first embodiment, the electrical cabinet body 2 includes a cabinet body 4 and a cabinet door 5 connected to the cabinet body, the cabinet body 4 includes an instrument room 6, a circuit breaker room 7 and a cable room 8, the circuit breaker room 7 is arranged above the cable room 8, and the instrument room 6 is arranged above the circuit breaker room 7; the human-computer interaction unit 10 is arranged on the cabinet door 5, the voltage protection unit 20 is arranged in the instrument room 6, the circuit breaker state detection control unit 40 is arranged in the circuit breaker room 7, and the current protection unit 30 is arranged in the cable room 8.

[0055] Since the designed electrical cabinet 1 includes the measurement and control device 3 in the first embodiment, the different integrated functional units of the designed electrical cabinet 1 realize information sharing communication between different integrated units through the bus CAN, so that the connection between devices does not need to cross other device rooms, thereby solving the current problem of complex and redundant lines in electrical cabinets, thereby saving the cost of line materials and having the advantages of low carbonization and easy installation.

[0056] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0057] In addition, the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0058] Furthermore, the functional modules in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0059] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0060] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A measurement and control device, characterized in that: Used to monitor and control data of the power system, comprising: a human-machine interaction unit, a voltage protection unit, a current protection unit, and a circuit breaker state detection control unit, wherein the human-machine interaction unit, the voltage protection unit, the current protection unit, and the circuit breaker state detection control unit are connected via a bus; The voltage protection unit is used to monitor the voltage data of the power system, determine whether to perform voltage protection based on the monitored voltage data, and synchronize the monitored voltage data to other components through a bus; The current protection unit is used to monitor the current data of the power system, determine whether to perform current protection based on the monitored current data, and synchronize the monitored current data to other components through a bus; The circuit breaker status detection control unit is used to monitor the status of the circuit breaker and / or the isolating trolley of the power system, and determine whether to open or close the circuit breaker and / or the isolating trolley based on the status of the circuit breaker and / or the isolating trolley, and synchronize the status of the circuit breaker and / or the isolating trolley to other components through the bus; The human-computer interaction unit is used to receive monitoring data synchronized by other components through the bus, display the received monitoring data and receive operation information, and issue corresponding operation instructions to corresponding components through the bus based on the operation information; The voltage protection unit includes a voltage controller, a first bus communication element and a first analog-to-digital conversion element, wherein the voltage controller is connected to the bus through the first bus communication element, and the voltage controller is connected to the first analog-to-digital conversion element; The first analog-to-digital conversion element is used to connect to a voltage detection device of the power system to perform analog-to-digital conversion on voltage data detected by the voltage detection device and transmit the converted data to the voltage controller; The voltage controller is used to determine whether to perform voltage protection based on the voltage data after analog-to-digital conversion, and synchronize the voltage data after analog-to-digital conversion with other components connected to the bus through the first bus communication element; The current protection unit comprises a current controller, a second bus communication element and a second analog-to-digital conversion element, wherein the current controller is connected to the bus via the second bus communication element, and the current controller is connected to the second analog-to-digital conversion element; The second analog-to-digital conversion element is used to connect to the current detection device of the power system to perform analog-to-digital conversion on the current data detected by the current detection device and transmit the converted data to the current controller; The current controller is used to determine whether to perform current protection based on the current data after analog-to-digital conversion, and synchronize the current data after analog-to-digital conversion with other components connected to the bus through the second bus communication element; The circuit breaker state detection control unit comprises a circuit breaker controller, a third bus communication element, a switch input element and a switch output element, wherein the circuit breaker controller is connected to the bus via the third bus communication element, and the circuit breaker controller is connected to the circuit breaker and / or the isolation trolley of the power system via the switch input element and the switch output element; The circuit breaker controller is used to detect the status of the circuit breaker and / or the isolating trolley through the switch input element, and synchronize the status of the circuit breaker and / or the isolating trolley with other components connected to the bus through the third bus communication element; and when receiving the opening and closing command, the circuit breaker and / or the isolating trolley is driven through the switch output element to disconnect the circuit breaker or the isolating trolley; At least one of the voltage protection unit and the current protection unit is connected to the circuit breaker of the power system through a circuit breaker control signal line to send a control signal to the circuit breaker when the monitoring data is abnormal; At least one of the voltage protection unit and the current protection unit is connected to the isolation trolley of the power system through an isolation trolley control signal line to send a control signal to the isolation trolley when the monitoring data is abnormal.

2. The measurement and control device according to claim 1, characterized in that: The human-machine interaction unit includes a human-machine interaction controller, a fourth bus communication element, a display screen element and an operating element, wherein the human-machine interaction controller is connected to the bus via the fourth bus communication element, and the human-machine interaction controller is connected to the display screen element and the operating element respectively; The human-computer interaction controller is used to receive monitoring data synchronized by other components through the bus through the fourth bus communication element, and display the monitoring data through the display screen element; it is also used to receive operation information through the operating element, and send corresponding operation instructions to the corresponding components through the bus based on the operation information.

3. The measurement and control device according to claim 1, characterized in that: The circuit breaker control signal line includes a plurality of circuit breaker control signal lines, and the plurality of circuit breaker control signal lines respectively transmit a circuit breaker opening control signal, a circuit breaker closing control signal, a circuit breaker opening state signal, and a circuit breaker closing state signal.

4. The measurement and control device according to claim 1, characterized in that: The isolation trolley control signal line includes a plurality of isolation trolley control signal lines, and the plurality of isolation trolley control signal lines respectively transmit an isolation trolley experimental position signal and an isolation trolley working position signal.

5. An electrical cabinet, characterized in that: The electrical cabinet comprises an electrical cabinet body and the measurement and control device according to any one of claims 1 to 4, wherein the electrical cabinet body comprises a cabinet body and a cabinet door connected to the cabinet body, wherein the cabinet body comprises an instrument room, a circuit breaker room and a cable room, wherein the circuit breaker room is arranged above the cable room, and wherein the instrument room is arranged above the circuit breaker room; The human-machine interaction unit is arranged on the cabinet door, the voltage protection unit is arranged in the instrument room, the circuit breaker state detection control unit is arranged in the circuit breaker room, and the current protection unit is arranged in the cable room.

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