Experimental equipment for intelligent power distribution switch cabinet and use method of experimental equipment

Abstract

The invention provides experimental equipment for an intelligent power distribution switch cabinet and a use method thereof, the experimental equipment comprises an experimental equipment main body, and an isolation door and an insulation panel are arranged, so that the experimental equipment can protect an operator from being damaged by electric shock and other potential dangers during fault simulation. And by adding protection elements such as a leakage protector, an overload protector and a short circuit protector, a real circuit protection process can be simulated in an experiment, and the safety of the experiment is enhanced. By using a temperature sensor, a current sensor and a voltage sensor, key parameters in the experiment process can be monitored in real time and displayed on an experiment result display, and rapid analysis and fault diagnosis are facilitated. Therefore, researchers or technicians can better understand the performance of the power distribution switch cabinet under various conditions. Various faults possibly occurring in the power distribution system can be simulated through an overload simulation tester, a short circuit simulation tester and a fault signal generator in the fault simulation element.

Description

Technical Field

[0001] The present invention relates to the field of experimental equipment, and in particular to an experimental equipment for an intelligent power distribution switch cabinet and a use method thereof. Background Art

[0002] In modern power systems, distribution switchgear plays a vital role. It is not only a hub for power distribution, but also a guardian of power equipment and power grid safety. As a highly integrated electrical equipment, the core function of distribution switchgear is to receive, distribute and control electric energy. The external line is first connected to the main control switch in the cabinet, and then diverted to each sub-control switch. According to actual needs, it provides a stable and reliable power supply for various equipment including instruments, automatic control systems, motor magnetic switches, and AC contactors. Structurally, the design of distribution switchgear is sophisticated and efficient. It may contain high-voltage and low-voltage rooms to meet the needs of different voltage levels. The design of high-voltage busbars ensures the stable transmission of electric energy, especially in large power facilities in power plants, where the role of high-voltage busbars is indispensable. The main function of distribution switchgear is reflected in its ability to open, close, control and protect electrical equipment. In the process of power generation, transmission, distribution and power conversion, it always ensures the stable operation of the power system. Through the key components of internal circuit breakers, disconnectors and load switches, efficient distribution and precise control of power are achieved. In addition, the distribution switchgear is also equipped with various protection devices, including mutual inductors and overcurrent protectors, to ensure that when an abnormality occurs in the power system, the fault circuit can be quickly cut off to prevent the accident from expanding and protect the equipment from damage. The application range of distribution switchgear is very wide, from power plants, substations and large power facilities to petrochemical, metallurgical steel rolling, light industry and textile industry.

[0003] The Chinese invention patent application number: CN202122011040.4 proposes an experimental equipment for an intelligent distribution switch cabinet, including a placement component, a water spray component and an action component. The placement component includes a base and a placement plate. A circular hole is provided on the upper end surface of the base, and the circular hole is connected to the lower end surface of the base. A rotating shaft is fixedly installed on the lower end surface of the placement plate, and the rotating shaft is rotatably installed in the circular hole. The water spray component includes a nozzle and a water inlet pipe, and the nozzle is controlled by the action component. The above structure solves the problem that it is very inconvenient for staff to manually take the nozzle, which greatly increases the labor intensity of the staff and increases the consumption of manpower and material resources.

[0004] In the traditional distribution switchgear testing process, testers need to perform manual operations, including picking up the nozzle and connecting the test line, which not only increases the complexity of the operation, but also increases the risk of human error. In order to solve these problems, the existing intelligent distribution switchgear test equipment has achieved a certain degree of automation and intelligence, which can reduce the manual operation of testers and improve test efficiency and accuracy. However, although the existing intelligent distribution switchgear test equipment has made significant progress in reducing manual operations, it still has some shortcomings, including the following:

[0005] First, there is still a lack of adequate protection and isolation measures during the test process. In the test of the distribution switch cabinet, due to the possible leakage and short circuit electrical safety issues, once the test equipment or the distribution switch cabinet itself fails, it may pose a threat to the life safety of the tester. Therefore, how to ensure the safety of the tester during the test process is an important issue that the existing intelligent distribution switch cabinet experimental equipment needs to solve.

[0006] Secondly, the existing intelligent distribution switch cabinet experimental equipment often lacks intelligent fault simulation and diagnosis modules after the test is completed. In the actual operation of the power system, the distribution switch cabinet may encounter various complex fault conditions, which may be caused by different reasons and require different processing strategies. However, after the test is completed, the existing experimental equipment can often only provide simple test results or data, and cannot simulate and diagnose possible faults. This not only limits the application scope of the test equipment, but also reduces its practical value in the maintenance and management of the actual power system. Therefore, in order to further improve the safety and intelligence level of the intelligent distribution switch cabinet experimental equipment, we propose an experimental equipment for intelligent distribution switch cabinet and its use method. Summary of the invention

[0007] The purpose of the present invention is to address the problems raised by the existing background technology. In order to achieve the above-mentioned invention purpose, the present invention provides the following technical solutions: an experimental device for an intelligent power distribution switch cabinet, comprising an experimental device body, a test bench is arranged in the experimental device body, an experimental result display is arranged on the outside of the experimental device body, a main frame is arranged in the experimental device body, an isolation door is arranged at the outer end of the experimental device body, a protective element is arranged in the experimental device body, a fault simulation element is arranged on the test bench, the fault simulation element is provided with an overload simulation tester and a short circuit simulation tester and a fault signal generator, and the fault simulation element is connected to a fault diagnosis sensor.

[0008] As a preferred technical solution of the present invention, the fault diagnosis sensor is provided with a temperature sensor, a current sensor and a voltage sensor, and the temperature sensor, the current sensor and the voltage sensor are all connected to the experimental result display circuit.

[0009] As a preferred technical solution of the present invention, the protective element is provided with a leakage protector, an overload protector and a short-circuit protector. The overload simulation tester is connected to the overload protector circuit, the short-circuit simulation tester is data-connected to the short-circuit protector, and the leakage protector is data-connected to the fault signal generator.

[0010] As a preferred technical solution of the present invention, a data transmission line is arranged on the left side of the test bench, the outer surface of the data transmission line is covered with an insulating sleeve, the data transmission line is connected to the fault processor circuit, a fault code display is arranged on the outside of the fault processor, and the right side of the test bench is connected to a fault diagnosis evaluator through the data transmission line.

[0011] As a preferred technical solution of the present invention, an alarm mechanism is arranged on the side of the main body of the experimental equipment, and the alarm mechanism is provided with an alarm buzzer, and the alarm buzzer is connected to the buzzer vibration motor circuit, and the alarm buzzer and the buzzer vibration motor are connected to an external power supply through a power port.

[0012] As a preferred technical solution of the present invention, an insulating panel is provided on the inner side of the isolation door, and a sliding track is provided under the isolation door.

[0013] As a preferred technical solution of the present invention, an experiment control panel is provided on the experiment result display, and the experiment control panel is connected to the overload simulation experimenter, the short circuit simulation experimenter and the fault signal generator circuit.

[0014] A method for using an experimental device for an intelligent power distribution switch cabinet comprises the following steps:

[0015] S1. Experimental preparation: Place the main body of the experimental equipment on a safe and stable ground, and ensure that the external power supply is firmly connected to the power port of the equipment. Open the isolation door of the main body of the experimental equipment, check whether the internal components are intact, check whether the connection wires of the temperature sensor, current sensor, and voltage sensor in the fault diagnosis sensor are firm and undamaged, and connect the experimental equipment to the distribution switch cabinet that needs to be tested;

[0016] S2. Setting experimental parameters: through the experimental control panel on the experimental result display, set the parameters of the overload simulator, short circuit simulator and fault signal generator to simulate different fault conditions;

[0017] S3. Start the experiment: Press the start button on the experiment control panel to start the experiment. During the experiment, the fault simulation component will simulate various fault conditions, including the overload simulation tester and the short circuit simulation tester.

[0018] S4. Observe data: During the experiment, observe the changes in temperature, current, and voltage parameters through the experimental result display, and record the parameter data of the distribution switch cabinet under fault conditions;

[0019] S5, fault diagnosis: when a fault occurs, the fault diagnosis sensor transmits the detected fault signal to the fault processor, which analyzes the fault code and displays it on the fault code display, and performs fault evaluation on the fault diagnosis evaluator, and displays the evaluation result on the experimental result display;

[0020] S6. Record data: During the experiment, use the data transmission line to transmit the experimental data to external equipment for recording and analysis.

[0021] As a preferred technical solution of the present invention, S5, the fault diagnosis formula of the fault processor in the fault diagnosis is:

[0022]

[0023] Among them, F sim(t) represents the value of the analog signal at time t, A i is the amplitude of the ith sine wave, f i is the frequency of the ith sine wave, θ i is the phase of the ith sine wave, and n is the total number of sine waves.

[0024] As a preferred technical solution of the present invention, S5, the fault severity evaluation formula of the fault diagnosis evaluator in fault diagnosis is:

[0025]

[0026] Where S is the fault severity evaluation result, M is the number of evaluation indicators, ω i is the weight of the i-th evaluation index, is the evaluation function value corresponding to the i-th evaluation index.

[0027] Compared with the prior art, the present invention has the following beneficial effects: by setting up the isolation door and the insulating panel, the experimental equipment can protect the operator from electric shock and other potential hazards when simulating a fault. At the same time, the addition of protective elements such as leakage protectors, overload protectors and short-circuit protectors can simulate the real circuit protection process in the experiment and enhance the safety of the experiment.

[0028] By using temperature sensors, current sensors and voltage sensors, key parameters in the experiment can be monitored in real time and displayed on the experimental result display, which is convenient for quick analysis and fault diagnosis. This helps researchers or technicians better understand the performance of distribution switchgear under various conditions. The overload simulator, short circuit simulator and fault signal generator in the fault simulation components can simulate various types of faults that may occur in the distribution system.

[0029] The experimental equipment is connected to external equipment through data transmission lines, which facilitates the collection and recording of experimental data and provides a basis for subsequent analysis. At the same time, the use of fault diagnosis evaluators further improves the accuracy and efficiency of data analysis. The integrated design of the experimental control panel simplifies the start-up and control process of the experiment, making the operation more intuitive and convenient. The design of the sliding track and isolation door also takes into account the maintenance convenience of the equipment, ensuring that the equipment can be easily cleaned and maintained.

[0030] The integration of alarm mechanisms, including alarm buzzers and buzzer vibration motors, can immediately alert operators when abnormal conditions are detected, increasing the safety features of the experimental equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure provided by the present invention;

[0032] Figure 2 A schematic diagram of the structure of a fault simulation element provided by the present invention;

[0033] Figure 3 A schematic diagram of the structure of a fault processor provided by the present invention;

[0034] Figure 4 A schematic diagram of the structure of the alarm buzzer provided by the present invention;

[0035] Figure 5 A schematic diagram of the structure of a fault diagnosis sensor provided by the present invention;

[0036] Figure 6 A schematic diagram of the structure of a fault simulation element provided by the present invention;

[0037] Figure 7 This is a schematic diagram of the structure of the protection element provided by the present invention.

[0038] Indicated in the figure:

[0039] 1. Experimental equipment body; 2. Experimental table; 3. Experimental result display; 301. Experimental control panel; 4. Main frame; 5. Isolation door; 501. Insulation panel; 6. Sliding track;

[0040] 7. Protective element; 8. Leakage protector; 9. Overload protector; 10. Short circuit protector;

[0041] 11. Fault simulation element; 1101. Overload simulation tester; 1102. Short circuit simulation tester; 1103. Fault signal generator;

[0042] 12. Fault diagnosis sensor; 1201. Temperature sensor; 1202. Current sensor; 1203. Voltage sensor;

[0043] 13. Data transmission line; 14. Insulation sleeve; 15. Fault processor; 16. Fault code display;

[0044] 17. Fault diagnosis evaluator;

[0045] 18. Alarm mechanism; 19. Alarm buzzer; 20. Buzzer vibration motor; 21. Power port. DETAILED DESCRIPTION

[0046] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0047] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other without conflict. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0048] Example 1: Please refer to Figure 1-Figure 7 An experimental device for an intelligent power distribution switch cabinet includes an experimental device body 1, an experimental table 2 is arranged in the experimental device body 1, an experimental result display 3 is arranged on the outside of the experimental device body 1, a main frame 4 is arranged in the experimental device body 1, an isolation door 5 is arranged at the outer end of the experimental device body 1, a protective element 7 is arranged in the experimental device body 1, a fault simulation element 11 is arranged on the experimental table 2, the fault simulation element 11 is provided with an overload simulation experimenter 1101, a short circuit simulation experimenter 1102 and a fault signal generator 1103, and the fault simulation element 11 is connected to a fault diagnosis sensor 12.

[0049] The fault diagnosis sensor 12 is provided with a temperature sensor 1201 , a current sensor 1202 , and a voltage sensor 1203 . The temperature sensor 1201 , the current sensor 1202 , and the voltage sensor 1203 are all connected to the experimental result display 3 by circuit.

[0050] The protection element 7 is provided with a leakage protector 8, an overload protector 9 and a short circuit protector 10. The overload simulation tester 1101 is circuit-connected with the overload protector 9, the short circuit simulation tester 1102 is data-connected with the short circuit protector 10, and the leakage protector 8 is data-connected with the fault signal generator 1103.

[0051] A data transmission line 13 is arranged on the left side of the test bench 2, and an insulating sleeve 14 is arranged on the outer surface of the data transmission line 13. The data transmission line 13 is circuit-connected to a fault processor 15, and a fault code display 16 is arranged on the outside of the fault processor 15. A fault diagnosis evaluator 17 is connected to the right side of the test bench 2 through the data transmission line 13.

[0052] An alarm mechanism 18 is arranged on the side of the main body 1 of the experimental equipment. The alarm mechanism 18 is provided with an alarm buzzer 19. The alarm buzzer 19 is circuit-connected to a buzzer vibration motor 20. The alarm buzzer 19 and the buzzer vibration motor 20 are connected to an external power source through a power port 21.

[0053] An insulating panel 501 is arranged on the inner side of the isolation door 5 , and a sliding track 6 is arranged below the isolation door 5 .

[0054] An experiment control panel 301 is provided on the experiment result display 3 , and the experiment control panel 301 is circuit-connected with the overload simulation tester 1101 , the short-circuit simulation tester 1102 and the fault signal generator 1103 .

[0055] A method for using an experimental device for an intelligent power distribution switch cabinet comprises the following steps:

[0056] S1. Experimental preparation: Place the main body 1 of the experimental equipment on a safe and stable ground, and ensure that the external power supply is firmly connected to the power port 21 of the equipment, open the isolation door 5 of the main body 1 of the experimental equipment, check whether the internal components are intact, check whether the connection lines of the temperature sensor 1201, current sensor 1202, and voltage sensor 1203 in the fault diagnosis sensor 12 are firm and undamaged, and connect the experimental equipment to the distribution switch cabinet that needs experimental testing;

[0057] S2. Setting experimental parameters: setting the parameters of the overload simulation tester 1101, the short circuit simulation tester 1102 and the fault signal generator 1103 through the experimental control panel 301 on the experimental result display 3 to simulate different fault conditions;

[0058] S3, start the experiment: press the start button on the experiment control panel 301 to start the experiment; during the experiment, the fault simulation element 11 will simulate various fault conditions, including the overload simulation tester 1101 and the short circuit simulation tester 1102;

[0059] S4, observe data: during the experiment, observe the changes in temperature, current, and voltage parameters through the experimental result display 3, and record the parameter data of the distribution switch cabinet under fault conditions;

[0060] S5, fault diagnosis: when a fault occurs, the fault diagnosis sensor 12 transmits the detected fault signal to the fault processor 15, and the fault processor 15 displays the fault code through the fault code display 16 after analysis, and performs fault evaluation through the fault diagnosis evaluator 17, and displays the evaluation result on the experimental result display 3;

[0061] S6. Recording data: During the experiment, the data transmission line 13 is used to transmit the experimental data to an external device for recording and analysis.

[0062] S5, Fault diagnosis formula of fault processor 15 in fault diagnosis:

[0063]

[0064] Among them, F sim(t) represents the value of the analog signal at time t, A i is the amplitude of the ith sine wave, f i is the frequency of the ith sine wave, θ i is the phase of the ith sine wave, and n is the total number of sine waves.

[0065] S5. Fault severity evaluation formula of the fault diagnosis evaluator 17 in fault diagnosis:

[0066]

[0067] Where S is the fault severity evaluation result, M is the number of evaluation indicators, ω i is the weight of the i-th evaluation index, is the evaluation function value corresponding to the i-th evaluation index.

[0068] By setting up the isolation door 5 and the insulating panel 501, the experimental equipment can protect the operator from electric shock and other potential hazards when simulating a fault. At the same time, the addition of protective elements 7 such as leakage protector 8, overload protector 9 and short-circuit protector 10 can simulate the real circuit protection process in the experiment and enhance the safety of the experiment. The use of temperature sensor 1201, current sensor 1202 and voltage sensor 1203 enables the key parameters in the experimental process to be monitored in real time and displayed on the experimental result display 3, which is convenient for rapid analysis and fault diagnosis. This helps researchers or technicians better understand the performance of the distribution switch cabinet under various conditions.

[0069] The overload simulator 1101, short circuit simulator 1102 and fault signal generator 1103 in the fault simulation element 11 can simulate various types of faults that may occur in the power distribution system. Together with the fault processor 15 and the fault code display 16, they can effectively demonstrate and teach the fault detection and handling process.

[0070] The experimental equipment is connected to external equipment via a data transmission line 13, which is convenient for collecting and recording experimental data, providing a basis for subsequent analysis. At the same time, the use of the fault diagnosis evaluator 17 further improves the accuracy and efficiency of data analysis. The integrated design of the experimental control panel 301 simplifies the startup and control process of the experiment, making the operation more intuitive and convenient. The design of the sliding track 6 and the isolation door 5 also takes into account the maintenance convenience of the equipment, ensuring that the equipment can be easily cleaned and maintained. The integration of the alarm mechanism 18, including the alarm buzzer 19 and the buzzing vibration motor 20, can immediately remind the operator when an abnormal situation is detected, increasing the safety features of the experimental equipment.

[0071] Embodiment 2: An experimental device for an intelligent power distribution switch cabinet. In the fault isolation of the power distribution switch cabinet, it is necessary to determine the specific location or component where the fault occurs. The fault isolation method can evaluate the degree of association between the node and the fault by calculating the fault isolation index of each node. Nodes with high fault isolation indexes are more likely to be the locations where the fault occurs. This method can effectively narrow the scope of fault troubleshooting and improve the efficiency and accuracy of fault isolation.

[0072] In the process of intelligent fault simulation and diagnosis module of experimental equipment of intelligent power distribution switch cabinet, the specific steps of fault simulation and diagnosis using the above formula are as follows:

[0073] Determine the fault type and parameters:

[0074] According to the experimental requirements and test objectives, the fault types that need to be simulated include overload, short circuit, grounding and the corresponding fault parameters include current, voltage and time.

[0075] Fault diagnosis formula:

[0076] Among them, F sim(t) represents the value of the analog signal at time t, A i is the amplitude of the ith sine wave, f i is the frequency of the ith sine wave, θ i is the phase of the ith sine wave, and n is the total number of sine waves.

[0077] Generate simulation data: Generate simulated fault data based on simulation formula and set parameters. These simulation data will be used in the subsequent fault diagnosis process.

[0078] Experimental equipment configuration: Input the generated simulation data into the experimental equipment of the intelligent power distribution switch cabinet. Configure the experimental equipment to simulate the real electrical environment and fault conditions.

[0079] Troubleshooting steps

[0080] Data collection: Start the experimental equipment and simulate the occurrence of a fault. Collect the data generated during the experiment, including real-time monitoring data of current, voltage, and temperature.

[0081] Feature extraction: Preprocess the collected data, including filtering and denoising. Use feature extraction technology to extract key fault features from the data.

[0082] Fault diagnosis: Apply the fault diagnosis formula and take the extracted fault features as input. The neural network model will output the probability distribution of the possibility of each type of fault. The category with the highest probability is selected as the final fault diagnosis result.

[0083] Fault isolation: If you need to determine the specific location or component where the fault occurred, you can use a fault isolation method based on graph theory. Calculate the fault isolation index of each node to evaluate the degree of association between the node and the fault. Nodes with high fault isolation indexes are more likely to be the location where the fault occurred.

[0084] Result output and report: The results of fault diagnosis and isolation are presented to the user in a clear manner. A detailed experimental report is generated, including fault type, fault location, and fault severity information.

[0085] In the fault diagnosis of the distribution switch cabinet, we need not only to determine the type of fault, but also to assess the severity of the fault; the fault severity assessment formula is

[0086] Where S is the fault severity evaluation result, M is the number of evaluation indicators, ω i is the weight of the i-th evaluation index, is the evaluation function value corresponding to the i-th evaluation index.

[0087] Working principle of the present invention: The experimental equipment simulates various fault conditions that the distribution switch cabinet may encounter in actual application through the fault simulation element 11 overload simulation experimenter 1101, short circuit simulation experimenter 1102, and fault signal generator 1103. These simulation elements can be activated independently or in combination to generate corresponding fault signals. The fault diagnosis sensor 12 temperature sensor 1201, current sensor 1202, and voltage sensor 1203 are used to monitor various parameters in real time during the experiment. These sensors send data to the experimental result display 3 so that the operator can intuitively observe the impact of the fault on the system. The leakage protector 8, overload protector 9, and short circuit protector 10 in the protection element 7 provide necessary safety measures during the experiment. These protectors are connected to the fault simulation element 11, and once an abnormal situation is detected, the power supply can be quickly cut off or other protective measures can be taken. The fault processor 15 receives data from the fault diagnosis sensor 12 and displays the fault type and location to the operator through the fault code display 16. The fault diagnosis evaluator 17 analyzes the collected data to evaluate the impact of the fault and provide solution suggestions. The alarm mechanism 18 includes an alarm buzzer 19 and a buzzer vibration motor 20, which are activated when danger or failure is detected to remind the operator to take emergency measures.

[0088] Workflow of the present invention:

[0089] Preparation stage: Open the isolation door 5 of the experimental equipment body 1, check whether the experimental table 2 and each connection line are intact, ensure that the external power supply meets the equipment requirements, and connect the power port 21. Set the experimental parameters through the experimental control panel 301, such as the threshold of overload and short circuit.

[0090] Experiment start: Start the experiment on the experiment control panel 301, and the fault simulation element 11 starts to work, simulating fault conditions such as overload and short circuit. Observe the real-time data on the experiment result display 3, such as temperature, current and voltage changes.

[0091] Fault detection and processing: When the fault diagnosis sensor 12 detects abnormal data, it immediately transmits the information to the fault processor 15 and the experimental result display 3. The protection element 7 is activated according to the preset conditions, for example, the overload protector 9 disconnects the circuit when the current exceeds the threshold.

[0092] Data analysis and recording: The fault diagnosis evaluator 17 receives the information from the data transmission line 13 and performs data analysis. The fault diagnosis formula is:

[0093] Among them, F sim(t) represents the value of the analog signal at time t, A i is the amplitude of the ith sine wave, f i is the frequency of the ith sine wave, θi is the phase of the ith sine wave, and n is the total number of sine waves. Evaluate the impact of the fault. The fault code display 16 displays the fault code to help the operator quickly identify and solve the problem.

[0094] End of experiment and cleanup: After the experiment is completed, turn off all simulated faults through the experiment control panel 301. Disconnect the external power supply, close the isolation door 5, and ensure that the experimental equipment is in a safe state. Record the experimental data and observation results, clean the experimental table 2, and keep the equipment clean.

[0095] Emergency treatment: If the alarm mechanism 18 is triggered during the experiment, check the experimental equipment immediately and take necessary measures. When dealing with faults or maintaining equipment, be sure to cut off the power supply and follow the operating manual.

[0096] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. An experimental device for an intelligent power distribution switch cabinet, comprising an experimental device body (1), a test bench (2) is arranged inside the experimental device body (1), an experimental result display (3) is arranged outside the experimental device body (1), and a main frame (4) is arranged inside the experimental device body (1), characterized in that: An isolation door (5) is provided at the outer end of the experimental equipment body (1), a protective element (7) is provided inside the experimental equipment body (1), a fault simulation element (11) is provided on the experimental table (2), the fault simulation element (11) is provided with an overload simulation tester (1101), a short circuit simulation tester (1102) and a fault signal generator (1103), and the fault simulation element (11) is connected to a fault diagnosis sensor (12).

2. The experimental equipment for intelligent power distribution switch cabinet according to claim 1, characterized in that: The fault diagnosis sensor (12) is provided with a temperature sensor (1201), a current sensor (1202) and a voltage sensor (1203); the temperature sensor (1201), the current sensor (1202) and the voltage sensor (1203) are all connected to the experimental result display (3) circuit.

3. The experimental equipment for intelligent power distribution switch cabinet according to claim 1, characterized in that: The protection element (7) is provided with a leakage protector (8), an overload protector (9) and a short-circuit protector (10); the overload simulation tester (1101) is circuit-connected to the overload protector (9); the short-circuit simulation tester (1102) is data-connected to the short-circuit protector (10); and the leakage protector (8) is data-connected to a fault signal generator (1103).

4. The experimental equipment for intelligent power distribution switch cabinet according to claim 1, characterized in that: A data transmission line (13) is arranged on the left side of the test bench (2), the outer surface of the data transmission line (13) is covered with an insulating sleeve (14), the data transmission line (13) is connected to a fault processor (15) circuit, a fault code display (16) is arranged outside the fault processor (15), and a fault diagnosis evaluator (17) is connected to the right side of the test bench (2) through the data transmission line (13).

5. The experimental equipment for intelligent power distribution switch cabinet according to claim 1, characterized in that: An alarm mechanism (18) is arranged on the side of the experimental equipment body (1), and the alarm mechanism (18) is provided with an alarm buzzer (19). The alarm buzzer (19) is connected to a buzzer vibration motor (20) circuit, and the alarm buzzer (19) and the buzzer vibration motor (20) are connected to an external power supply through a power port (21).

6. The experimental equipment for intelligent power distribution switch cabinet according to claim 1, characterized in that: An insulating panel (501) is arranged on the inner side of the isolation door (5), and a sliding track (6) is arranged below the isolation door (5).

7. The experimental equipment for intelligent power distribution switch cabinet according to claim 1, characterized in that: The experimental result display (3) is provided with an experimental control panel (301), and the experimental control panel (301) is connected to the overload simulation tester (1101), the short circuit simulation tester (1102) and the fault signal generator (1103) in a circuit.

8. A method for using an experimental device for an intelligent power distribution switch cabinet, characterized in that: The following steps are involved: S1. Experimental preparation: Place the main body (1) of the experimental equipment on a safe and stable ground, and ensure that the external power supply is firmly connected to the power port (21) of the equipment. Open the isolation door (5) of the main body (1) of the experimental equipment, check whether the internal components are intact, check whether the connection wires of the temperature sensor (1201), current sensor (1202), and voltage sensor (1203) in the fault diagnosis sensor (12) are firm and undamaged, and connect the experimental equipment to the power distribution switch cabinet that needs to be tested; S2. Setting experimental parameters: Setting the parameters of the overload simulation tester (1101), the short circuit simulation tester (1102) and the fault signal generator (1103) through the experimental control panel (301) on the experimental result display (3) to simulate different fault conditions; S3, start the experiment: press the start button on the experiment control panel (301) to start the experiment; during the experiment, the fault simulation element (11) will simulate various fault conditions, including the overload simulation tester (1101) and the short circuit simulation tester (1102); S4. Observe data: During the experiment, observe the changes in temperature, current, and voltage parameters through the experimental result display (3), and record the parameter data of the distribution switch cabinet under fault conditions; S5, fault diagnosis: when a fault occurs, the fault diagnosis sensor (12) transmits the detected fault signal to the fault processor (15), and the fault processor (15) displays the fault code through the fault code display (16) after analysis, and performs fault evaluation through the fault diagnosis evaluator (17), and displays the evaluation result on the experimental result display (3); S6. Recording data: During the experiment, the data transmission line (13) is used to transmit the experimental data to an external device for recording and analysis.

9. The method for using the experimental equipment for the intelligent power distribution switch cabinet according to claim 8, characterized in that: S5. Fault diagnosis formula of the fault processor (15) in fault diagnosis: Among them, F sim(t) represents the value of the analog signal at time t, A i is the amplitude of the ith sine wave, f i is the frequency of the ith sine wave, θ i is the phase of the ith sine wave, and n is the total number of sine waves.

10. The method for using the experimental equipment for intelligent power distribution switch cabinet according to claim 9, characterized in that: S5. Fault severity evaluation formula of the fault diagnosis evaluator (17) in fault diagnosis: Where S is the fault severity evaluation result, M is the number of evaluation indicators, ω i is the weight of the i-th evaluation index, is the evaluation function value corresponding to the i-th evaluation index.

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