A control cabinet for simulating operation and maintenance faults of a switch cabinet and a method for simulating faults thereof

Abstract

The present application belongs to the technical field of switch cabinet operation and maintenance simulation, and particularly relates to a switch cabinet fault simulation training and examination system and method, comprising a touch liquid crystal screen, a main control cabinet, a drawer, a fault simulation cabinet, a control signal input and output cabinet and a plurality of data lines; the fault simulation cabinet is connected with the main control cabinet through the data lines, and the fault simulation cabinet is arranged on the top of the main control cabinet; a power supply cabinet is connected to one side of the main control cabinet, and the top of the power supply cabinet is provided with the drawer; the rear side of the main control cabinet is connected with the control signal input and output cabinet; and the fault simulation cabinet is connected with the touch liquid crystal screen through the data lines. The present application combines the complex electrical primary system diagram with the entity cabinet, can simulate the practical operation and explanation, realizes the "visualization" training of the switch cabinet electrical primary system principle diagram, and solves the problem of the poor training effect of the current switch cabinet electrical primary system practical operation training which is based on the theory training and auxiliary on-site partial understanding learning.

Description

Technical Field

[0001] This invention belongs to the field of switchgear operation and maintenance simulation technology, specifically relating to a control cabinet for simulating switchgear operation and maintenance faults and a method for simulating faults. Background Technology

[0002] Switchgear is a crucial power distribution device in the power industry, playing a vital role in distributing electrical energy within power plants. It is one of the most important pieces of equipment in plant auxiliary power systems. Switchgear includes medium-voltage switchgear and low-voltage switchgear. Medium-voltage switchgear has a complex internal structure, equipped with intricate mechanical and electrical interlocking designs, and its protection configuration is also relatively complex. Currently, for operation and maintenance personnel in power plants or substations, simulation training and training for switchgear operation and maintenance skills mainly consist of theoretical training supplemented by practical training. Existing training cabinets simulating switchgear operation and maintenance faults lack the same relay protection logic functions as the busbar sections where physical switchgear is located. Simulated operation and maintenance training for switchgear relay protection configuration and practical training for primary electrical systems are primarily theoretical training, supplemented by on-site partial understanding, resulting in poor training effectiveness. Furthermore, existing training cabinets simulating switchgear operation and maintenance faults lack any status display on the AC circuit, such as liveness indicators, current, and voltage displays, failing to provide the same status display functions as physical switchgear. This hinders operation and maintenance trainees from gaining a deep understanding of the meaning represented by the relevant status quantities, impeding practical training in electrical systems.

[0003] Therefore, there is an urgent need to design a control cabinet and a method for simulating switchgear maintenance failures to solve the aforementioned existing technical problems. Summary of the Invention

[0004] This invention proposes a control cabinet and a method for simulating switchgear maintenance faults, which solves the technical problem that existing training cabinets for simulating switchgear maintenance faults do not have AC circuit status display, switchgear relay protection configuration function, and electrical primary system practical operation function.

[0005] The technical solution of the present invention:

[0006] A control cabinet for simulating switchgear maintenance faults includes a touch LCD screen, a main control cabinet, drawers, a fault simulation cabinet, a control signal input / output cabinet, and several data cables. The fault simulation cabinet is connected to the main control cabinet via data cables and is located on top of the main control cabinet. A power supply cabinet is connected to one side of the main control cabinet, and a drawer is located on the top of the power supply cabinet. A control signal input / output cabinet is connected to the rear side of the main control cabinet. The fault simulation cabinet is connected to the touch LCD screen via data cables.

[0007] The main control cabinet includes: a main control module, a switch, and a data acquisition module;

[0008] The fault simulation cabinet is equipped with a fault simulation module;

[0009] The control signal input / output cabinet is equipped with a control signal input / output module;

[0010] The power cabinet includes a DC power supply and a programmable AC power supply.

[0011] The main control module is connected to the fault simulation module, the control signal input / output module, and the switch via data cables; the switch is also connected to the data acquisition module.

[0012] The programmable AC power supply is connected to the data acquisition module via a data cable; the main control module is also connected to the load cabinet, voltage transformer and incoming line cabinet via data cables; the load cabinet, voltage transformer and incoming line cabinet are physical cabinets.

[0013] The fault simulation module includes: an incoming line cabinet fault module, a voltage transformer cabinet fault module, and a load cabinet fault module.

[0014] The control signal input / output module is equipped with a finished terminal block for simulating control signal transmission between the control cabinet and the physical cabinet;

[0015] The load cabinet fault module is connected to the load cabinet, and the load cabinet has zero-sequence load protection function, instantaneous overload protection function, stagnant load protection function, and thermal overload protection function.

[0016] The voltage transformer cabinet fault module is connected to the voltage transformer cabinet, and the voltage transformer cabinet has low voltage stage I protection and low voltage stage III protection functions.

[0017] The fault module of the incoming line cabinet is connected to the incoming line cabinet; the incoming line cabinet has arc flash incoming line protection function, arc flash backup incoming line protection function, failure incoming line protection function, and failure backup incoming line protection function.

[0018] A control cabinet for simulating switchgear operation and maintenance faults, as described above, includes the following simulation control steps:

[0019] Step 1: The operator clicks on the operation interface displayed on the touch LCD screen on the fault simulation cabinet. The fault simulation module of the fault simulation cabinet receives the simulated fault operation signal sent by the touch LCD screen and transmits the simulated fault operation signal to the data acquisition module of the main control cabinet.

[0020] Step 2: After the data acquisition module acquires the simulated fault operation signal, it transmits it to the switch. The switch converts the operation signal into a switch signal and sends it to the main control module. The main control module controls the load cabinet, voltage transformer cabinet, and incoming line cabinet to perform simulated fault settings according to the switch signal.

[0021] Step 3: Maintenance personnel perform simulated fault maintenance operations based on the simulated fault conditions of the physical cabinet;

[0022] Step 4: The main control module collects the simulated fault operation and maintenance status of the physical cabinet in real time, and feeds back the collected simulated fault operation and maintenance status information of the physical cabinet to the main control cabinet and the fault simulation cabinet through the control signal input and output module. It is also displayed on the touch LCD screen to provide real-time feedback to the operation and maintenance personnel on the progress of the simulated fault operation and maintenance of the physical cabinet and whether the fault has been resolved, so as to ensure the completion of the simulated operation and maintenance training.

[0023] The beneficial effects of this invention are:

[0024] 1. This invention combines complex electrical primary system diagrams with physical cabinets by setting up fault control cabinets, main control cabinets, and touch screen displays, enabling hands-on training and simulation. This achieves "visualized" training of switchgear electrical primary system schematic diagrams, solving the problem that current practical training for switchgear electrical primary systems relies on theoretical training and partial on-site understanding, resulting in poor training effectiveness.

[0025] 2. This invention simulates common faults by setting up a fault simulation module in the control cabinet and links the simulated faults to the physical cabinet in real time, thus realistically reproducing the fault conditions and handling process of the physical cabinet. This meets the simulation training requirements of operation and maintenance personnel and realizes a realistic "visualized" teaching of the entire process of handling common faults.

[0026] 3. This invention provides power to the control circuit of the switchgear by setting up the DC power supply module required by the switchgear, making the simulated fault point closer to the fault site, breaking through the problem that the existing practical training is almost at the theoretical level, and making the training and assessment of operation and maintenance personnel more effective.

[0027] 4. By setting up an AC power module, this invention enables the switchgear to display various status parameters (such as energization display, current, voltage, etc.) in a realistic manner when the primary circuit of the switchgear is not energized. This display is completely consistent with the status parameters displayed on the actual switchgear, creating a realistic training environment for maintenance personnel and effectively improving training efficiency.

[0028] 5. This invention sets up corresponding protection configuration functions for physical cabinets, and activates the protection function of a physical cabinet when needed to simulate the actual protection action on site. That is, the protection action can be realistically displayed in this simulation system, so that trainees can truly understand the functional logic of the protection configuration and effectively improve training efficiency. Attached Figure Description

[0029] Figure 1 This is a front view of the simulated switchgear designed for this invention;

[0030] Figure 2This is a schematic diagram of the internal electrical module connections of the simulated switchgear designed for this invention;

[0031] Figure 3 This is a rear view of the simulated switchgear of the present invention;

[0032] In the diagram: 1-Fault simulation cabinet, 2-Touch LCD screen, 3-Main control cabinet, 4-Drawer, 5-Fault simulation module, 6-Control signal input / output module, 7-DC power supply, 8-Programmable AC power supply, 9-Main control module, 10-Power supply cabinet, 11-Switch, 12-Data acquisition module, 13-Load cabinet, 14-Voltage transformer, 15-Incoming line cabinet, 51-Control signal input / output cabinet Detailed Implementation

[0033] The following describes in detail, with reference to the accompanying drawings and embodiments, a control cabinet for simulating switchgear maintenance faults and its fault simulation method.

[0034] like Figure 1 As shown, the control cabinet shell for simulating switchgear maintenance faults designed in this invention is made of thick steel plate bent and welded. The fault simulation cabinet 1 is equipped with a touch LCD screen 2, which is convenient for operators or maintenance personnel to operate while standing. The bottom of the cabinet is provided with wiring openings.

[0035] The control cabinet designed in this invention for simulating switchgear maintenance faults specifically includes: a touch LCD screen 2, a main control cabinet 3, a drawer 4, a fault simulation cabinet 1, a control signal input / output cabinet 51, and several data cables; the fault simulation cabinet 1 is connected to the main control cabinet 3 via data cables, and the fault simulation cabinet 1 is located on top of the main control cabinet 3. A power supply cabinet 10 is connected to one side of the main control cabinet 3, and a drawer 4 is provided on the top of the power supply cabinet 10; the control signal input / output cabinet 51 is connected to the rear side of the main control cabinet 3; the fault simulation cabinet 1 is connected to the touch LCD screen 2 via data cables.

[0036] The main control cabinet 3 includes: a main control module 9, a switch 11, and a data acquisition module 12;

[0037] The fault simulation cabinet 1 is equipped with a fault simulation module 5;

[0038] The control signal input / output cabinet 51 is equipped with a control signal input / output module 6;

[0039] The power supply cabinet 10 includes a DC power supply 7 and a programmable AC power supply 8. The DC power supply 7 is the control power supply for the analog control cabinet, and the programmable AC power supply 8 is used to simulate the voltage signals of the load cabinet 13, voltage transformer cabinet 14, and incoming line cabinet 15.

[0040] The main control module 9 is connected to the fault simulation module 5, the control signal input / output module 6 and the switch 11 via data cables; the switch 11 is also connected to the data acquisition module 12.

[0041] The programmable AC power supply 8 is connected to the data acquisition module 12 via a data cable; the main control module 9 is also connected to the load cabinet 13, voltage transformer 14 and incoming line cabinet 15 via data cables; the load cabinet 13, voltage transformer 14 and incoming line cabinet 15 are physical cabinets.

[0042] The fault simulation module 5 includes: an incoming line cabinet fault module, a voltage transformer cabinet fault module, and a load cabinet fault module. Each of these modules contains simulated fault points, which are disconnections derived from the corresponding physical cabinet control circuit. These simulated fault points are implemented as on / off switches within each module. The fault simulation module 5 is equipped with a dedicated cabinet door cover to ensure confidentiality for operators during simulated start-up and maintenance faults.

[0043] The control signal input / output module 6 is equipped with a finished terminal block for simulating control signal transmission between the control cabinet and the physical cabinet.

[0044] The load cabinet fault module is connected to the load cabinet 13, and the load cabinet 13 has zero-sequence load protection function, instantaneous overload protection function, stagnant load protection function, and thermal overload protection function.

[0045] The voltage transformer cabinet fault module is connected to the voltage transformer cabinet 14, and the voltage transformer cabinet 14 has low voltage stage I protection and low voltage stage III protection functions.

[0046] The fault module of the incoming line cabinet is connected to the incoming line cabinet 15; the incoming line cabinet 15 has arc flash incoming line protection function, arc flash backup incoming line protection function, failure incoming line protection function, and failure backup incoming line protection function.

[0047] A control cabinet for simulating switchgear operation and maintenance faults, as described above, includes the following simulation control steps:

[0048] Step 1: For operator simulation training, set up the fault simulation cabinet; click on the operation interface displayed on the touch LCD screen 2 on the fault simulation cabinet 1, select the common fault unit required for motor simulation fault training, and complete the simulated fault setting; the fault simulation module 5 of the fault simulation cabinet 1 receives the simulated fault operation signal sent by the touch LCD screen 2, and transmits the simulated fault operation signal to the data acquisition module 12 of the main control cabinet 3.

[0049] Step 2: After the data acquisition module 12 acquires the simulated fault operation signal, it transmits it to the switch 11. The switch 11 converts the operation signal into a switch signal and sends it to the main control module 9. The main control module 9 controls the load cabinet 13, voltage transformer cabinet 14, and incoming line cabinet 15 to perform simulated fault settings according to the switch signal.

[0050] Step 3: Based on the simulated fault conditions of the physical switch cabinet, the maintenance personnel will go to the physical switch cabinet to locate the simulated fault point and perform fault maintenance operations.

[0051] Step 4: The main control module 9 collects the simulated fault operation and maintenance status of the physical cabinet in real time, and feeds back the collected simulated fault operation and maintenance status information of the physical cabinet to the main control cabinet 3 and the fault simulation cabinet 1 through the control signal input and output module 6. The information is also displayed on the touch LCD screen 2, which is used to provide real-time feedback on the progress of the simulated fault operation and maintenance of the physical cabinet and whether the fault has been eliminated, so as to ensure the completion of the simulated operation and maintenance training.

[0052] The embodiments of the present invention have been described in detail above. The present invention is not limited to the above examples. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A control cabinet for simulating switchgear maintenance faults, characterized in that: It includes a touch LCD screen (2), a main control cabinet (3), a drawer (4), a fault simulation cabinet (1), a control signal input / output cabinet (51), and several data cables; the fault simulation cabinet (1) is connected to the main control cabinet (3) via data cables, and the fault simulation cabinet (1) is located on the top of the main control cabinet (3). A power supply cabinet (10) is connected to one side of the main control cabinet (3), and a drawer (4) is located on the top of the power supply cabinet (10); the control signal input / output cabinet (51) is connected to the rear side of the main control cabinet (3); the fault simulation cabinet (1) is connected to the touch LCD screen (2) via data cables.

2. The control cabinet for simulating switchgear maintenance faults according to claim 1, characterized in that: The main control cabinet (3) includes: a main control module (9), a switch (11), and a data acquisition module (12); The fault simulation cabinet (1) is equipped with a fault simulation module (5); The control signal input / output cabinet (51) is equipped with a control signal input / output module (6); The power cabinet (10) includes a DC power supply (7) and a programmable AC power supply (8).

3. A control cabinet for simulating switchgear maintenance faults according to claim 2, characterized in that: The main control module (9) is connected to the fault simulation module (5), the control signal input / output module (6) and the switch (11) via data lines; the switch (11) is also connected to the data acquisition module (12).

4. A control cabinet for simulating switchgear maintenance faults according to claim 3, characterized in that: The programmable AC power supply (8) is connected to the data acquisition module (12) via a data line; the main control module (9) is also connected to the load cabinet (13), voltage transformer (14) and incoming line cabinet (15) via data lines; the load cabinet (13), voltage transformer (14) and incoming line cabinet (15) are physical cabinets.

5. A control cabinet for simulating switchgear maintenance faults according to claim 4, characterized in that: The fault simulation module (5) includes: incoming line cabinet fault module, voltage transformer cabinet fault module and load cabinet fault module.

6. A control cabinet for simulating switchgear maintenance faults according to claim 5, characterized in that: The control signal input / output module (6) is equipped with a finished terminal block for simulating control signal transmission between the control cabinet and the physical cabinet; The load cabinet fault module is connected to the load cabinet (13), and the load cabinet (13) has zero-sequence load protection function, instantaneous overload protection function, stagnant load protection function, and thermal overload protection function. The voltage transformer cabinet fault module is connected to the voltage transformer cabinet (14), and the voltage transformer cabinet (14) has low voltage stage I protection and low voltage stage III protection functions. The fault module of the incoming line cabinet is connected to the incoming line cabinet (15); the incoming line cabinet (15) has arc light incoming line protection function, arc light backup incoming line protection function, failure incoming line protection function, and failure backup incoming line protection function.

7. A simulation control method for a control cabinet using any one of claims 1 to 6 for simulating switchgear maintenance faults, characterized in that: Includes the following steps: Step 1: The operator clicks on the operation interface displayed on the touch LCD screen (2) on the fault simulation cabinet (1). The fault simulation module (5) of the fault simulation cabinet (1) receives the simulated fault operation signal sent by the touch LCD screen (2) and transmits the simulated fault operation signal to the data acquisition module (12) of the main control cabinet (3). Step 2: The data acquisition module (12) acquires the simulated fault operation signal and transmits it to the switch (11). The switch (11) converts the operation signal into a switch signal and sends it to the main control module (9). The main control module (9) controls the load cabinet (13), voltage transformer cabinet (14), and incoming line cabinet (15) to perform simulated fault settings according to the switch signal. Step 3: Maintenance personnel perform simulated fault maintenance operations based on the simulated fault conditions of the physical cabinet; Step 4: The main control module (9) collects the simulated fault operation and maintenance status of the physical cabinet in real time, and feeds back the collected simulated fault operation and maintenance status information of the physical cabinet to the main control cabinet (3) and the fault simulation cabinet (1) through the control signal input and output module (6), and displays it through the touch LCD screen (2) to provide real-time feedback on the progress of the simulated fault operation and maintenance of the physical cabinet and whether the fault has been eliminated, so as to ensure the completion of the simulated operation and maintenance training.

Images