A training system for live-line working in power distribution networks

Abstract

This invention discloses a live-line working training system for power distribution networks, comprising a power distribution network model unit, a load unit, a fault simulation unit, a monitoring and display unit, an interactive terminal, a training evaluation unit, and a multimedia unit. The monitoring and display unit, along with the power distribution network model unit, is used to monitor and display the operating status and key parameters of the power distribution network model unit. The fault simulation unit includes a control cabinet, a fault simulation controller, and relays. The control cabinet has a number of busbars along its vertical axis equal to the number of output terminals of the power distribution network model. The output terminals of the power distribution network model unit are connected to the load unit through corresponding busbars. This invention has a unique structure and ingenious design, effectively solving the problems of existing training systems that mainly rely on theoretical explanations and simulation software, lack targeted training content, and have limited fault simulation. It also effectively solves the problem of limited and incomplete evaluation of training results in existing training systems.

Description

Technical Field

[0001] This invention belongs to the field of power distribution network training technology, specifically relating to a power distribution network live-line operation training system. Background Technology

[0002] With the continuous development of power systems and the sustained growth of electricity demand, the safe and stable operation of distribution networks has become particularly important. To ensure power supply reliability and power quality, and to reduce the impact of power outages on users, live-line working (LLM) technology for distribution networks has emerged. This technology allows for the maintenance, repair, and upgrading of distribution networks without power interruption, greatly improving power supply reliability and work efficiency. However, LLM operations place high demands on the skills and experience of operators; even slight negligence can lead to serious safety accidents and economic losses. Therefore, it is necessary to improve the skill level and practical operational capabilities of operators and reduce operational risks.

[0003] In order to improve the skills and practical abilities of operators and reduce operational risks, power departments and related colleges and universities have begun to attach importance to the practical training of live-line working technology. However, traditional training systems mainly rely on theoretical explanations and simulation software. The training content is not targeted enough, the fault simulation is singular and incomplete, and when evaluating the performance of operators in practical operations, only the training results are evaluated, lacking an objective and comprehensive assessment of the entire training process. This makes it difficult to meet the increasingly higher training requirements. Summary of the Invention

[0004] To address the shortcomings and problems of existing power distribution network training systems, this invention provides a power distribution network live-line work training system. This system has a unique structure and ingenious design, which not only effectively solves the problems of existing training systems that mainly rely on theoretical explanations and simulation software, lack targeted training content, and have limited fault simulation, but also effectively solves the problem of limited and incomplete evaluation of training results in existing training systems.

[0005] The solution adopted by this invention to solve its technical problem is: a power distribution network live-line operation training system, including a power distribution network model unit, a load unit, a fault simulation unit, a monitoring and display unit, an interactive terminal, a training and evaluation unit, and a multimedia unit. The monitoring and display unit is connected to the power distribution network model unit and is used to monitor and display the operating status and key parameters of the power distribution network model unit. The fault simulation unit includes a control cabinet, a fault simulation controller, and relays. The control cabinet has a number of busbars vertically arranged with the same number as the output terminals of the power distribution network model. The output terminals of the power distribution network model unit are respectively connected to the load unit through corresponding busbars. The load unit is used to simulate power supply to users with different load types and capacities. Each busbar is equipped with a relay for controlling the on / off state of the busbar and the... The system controls the connection and disconnection of one busbar to the next, and the relays are connected to the fault simulation controller. The fault simulation controller numbers the relays on the same busbar within the same control cabinet and can control the corresponding numbered relays to execute fault simulation commands according to instructions. The interactive terminal is connected to the fault simulation controller and is used to send fault simulation commands to the fault simulation controller. The training and evaluation unit includes a fault scenario database, a retrieval module, and a central control module. The retrieval module is connected to the fault simulation controller and matches the fault simulation commands received by the fault simulation controller with the data in the fault scenario database, and sends the matched data to the central control module for use. The multimedia unit includes an audio and video acquisition module, and the output of the audio and video acquisition module is communicatively connected to the central control module.

[0006] The audio and video acquisition module includes an audio acquisition module and a video acquisition module. The output terminals of both the audio and video acquisition modules are connected to the central control module. The input terminals of the audio and video acquisition modules are respectively connected to a microphone and a camera to record the operation process of the trainees and transmit the recorded operation process data to the central control module for comparison with the fault scenario database data received by the central control module.

[0007] The fault scenario database includes fault scenario models established based on standardized fault handling procedures. The fault scenario models include data on distribution network fault types and standardized handling procedures data of professionals when handling corresponding distribution network faults. After receiving the operation procedure data of the trainees, the central processing module compares it with the received standardized handling procedure data and judges the training operation process and results.

[0008] The standardized processing flow data includes standardized processing flow data for multiple job types. After receiving the operation flow data of the trainees, the central processing module compares it with the standardized processing flow data of the same job type in the received standardized processing flow data.

[0009] The multimedia unit also includes an audio and video output module. The input end of the audio and video output module is connected to the central control module, and the output end of the audio and video output module is connected to a speaker and a display screen to play the intercom voice and operation video of the standardized processing process data of other job types except for the training personnel in the standardized processing process data received by the central control module.

[0010] The power distribution network model unit includes a power supply module, a transformer module, and a distribution module. The power supply module is connected to the high-voltage side of the transformer module to simulate a high-voltage power supply. The input terminals of the distribution module are connected to the low-voltage side of the transformer module. The output terminals of the distribution module are connected to the load unit through corresponding busbars.

[0011] The control cabinet is equipped with a busbar frame for fixing the busbars.

[0012] Each busbar in the control box is connected to a rotary switch. The knob end of the rotary switch extends outward from the control box. The rotary switch has three connection terminals. The first connection terminal is connected to the busbar near the output terminal of the relay near the power distribution network model unit via a lead wire. The second and third connection terminals are connected to the busbar near the load unit via a lead wire. The second and third connection terminals are normally connected. The knob end can be used to control the disconnection of the second and third connection terminals, so that the second connection terminal is connected to the first connection terminal.

[0013] The beneficial effects of the present invention: Compared with existing distribution network training systems, the distribution network live-line working training system provided by the present invention has the following beneficial effects:

[0014] 1. By simulating high-voltage power sources through power modules, the risks of practical training operations are reduced, enabling training in uninterrupted power distribution network operations and providing a practical operation platform for technicians. Through the power distribution network model unit simulating the real power distribution network environment, trainees can conduct hands-on practice under safe and controllable conditions, improving their practical work skills.

[0015] 2. The system has complete functional units, including distribution network model, load simulation, fault simulation, monitoring and display, interactive control, training evaluation, multimedia recording, etc., which can comprehensively simulate all aspects of distribution network operation and realize a complete training process.

[0016] 3. The fault simulation unit is flexibly designed. Through the busbars and relays in the control cabinet, various fault scenarios can be set as needed, with a wide coverage to meet different training requirements.

[0017] 4. The practical training evaluation unit can objectively record and evaluate the trainees' operations. By comparing with the standard procedures, it can promptly identify any improper operations, which helps trainees improve their operations and enhance their skill levels.

[0018] 5. The multimedia unit can record audio and video materials of the entire training process, providing intuitive and detailed first-hand materials for training effect evaluation, experience summarization and training teaching.

[0019] 6. The training environment is realistic, covering all aspects of distribution network operation, which helps trainees to comprehensively and systematically master the relevant knowledge and skills of live-line operation in distribution networks, shortening the transition period from theoretical learning to practical work. The training system is highly targeted, functionally complete, and ingeniously designed, effectively solving key problems in live-line operation training in distribution networks, and is of great significance for the training of relevant technical personnel and practical work. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the fault simulation unit structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the rotary switch configuration of the present invention.

[0023] Figure 4 This is a schematic diagram showing the connection relationship between the rotary switch and the busbar of the present invention.

[0024] Figure 5 This is a schematic diagram of the control cabinet structure of the present invention.

[0025] Figure 6 This is a schematic diagram of the interactive terminal structure of the present invention.

[0026] In the diagram, the following numbers are used: 1 is the control cabinet, 2 is the rotary switch, 21 is the first connection terminal, 22 is the second connection terminal, 23 is the third connection terminal, 31 is the bracket, 32 is the guide sleeve, 33 is the annular signal disk, 34 is the arc-shaped groove, 35 is the fixed shaft, 36 is the control panel, 37 is the protruding terminal, 38 is the top spring, and 39 is the baffle. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example

[0028] This embodiment provides a power distribution network live-line working training system, such as... Figure 1As shown, it includes a distribution network model unit, a load unit, a fault simulation unit, a monitoring and display unit, an interactive terminal, a training and evaluation unit, and a multimedia unit. The monitoring and display unit is connected to the distribution network model unit and is used to monitor and display the operating status and key parameters of the distribution network model unit. The fault simulation unit includes a control cabinet, a fault simulation controller, and relays. The control cabinet has a number of buses along the vertical direction that are the same as the number of output terminals of the distribution network model. The output terminals of the distribution network model unit are connected to the load unit through corresponding buses. The load unit is used to simulate power supply to users with different load types and capacities. Specifically:

[0029] The power distribution network model unit includes a power supply module, a transformer module, and a distribution module. The power supply module is connected to the high-voltage side of the transformer module to simulate a high-voltage power source. The input terminals of the distribution module are connected to the low-voltage side of the transformer module, and the output terminals of the distribution module are connected to the load unit through corresponding busbars. The distribution module includes incoming line cabinets, busbar cabinets, and feeder cabinets. The input terminals of the incoming line cabinets are connected to the low-voltage side of the transformer module, the input terminals of the busbar cabinets are connected to the output terminals of the incoming line cabinets, and the output terminals of the busbar cabinets are connected to the input terminals of the feeder cabinets. The number of control cabinets is the same as the number of feeder cabinets, and they are installed on the corresponding feeder cabinets. The number of busbars in the control cabinets is the same as the number of output terminals of the feeder cabinets on the same side, and each output terminal of the feeder cabinet on the same side is connected to the load unit through its corresponding busbar. The power distribution network model simulates a high-voltage power source through the power supply module, thereby reducing the risk of practical training operations and realizing the practical training function of uninterrupted power distribution network operations. It provides a practical operation platform for technicians, allowing trainees to conduct hands-on practice under safe and controllable conditions and improve their practical work skills.

[0030] Each busbar is equipped with a relay to control the on / off state of that busbar and the connection between that busbar and the next busbar. The relay on the last busbar controls the on / off state of that busbar and the connection between that busbar and the topmost busbar. All busbars in the control box are in a normally connected state, meaning that the distribution network model unit is in normal operation and no faults occur.

[0031] The relays are connected to the fault simulation controller, which numbers the relays on the busbar within the same control cabinet and can control the corresponding numbered relays to execute fault simulation commands according to instructions. The interactive terminal is connected to the fault simulation controller and is used to send fault simulation commands to the controller, for example:

[0032] In this embodiment, the power module simulates a three-phase four-wire power supply. The feeder cabinet output terminals output three-phase live wires and one neutral wire, i.e., three live wires and one neutral wire. The three live wires and one neutral wire are respectively connected to bus A, bus B, bus C, and bus N in the control cabinet. When the field personnel send a fault simulation command to the fault simulation controller through the interactive terminal, the controller controls relay J1 on bus A to disconnect bus A and controls relay J1 to connect the energized section of bus A with bus B. Compared with traditional training systems that mainly rely on theoretical explanations and simulation software, the power distribution network live-line operation training system provided in this embodiment can simulate various circuit faults according to the fault simulation command, thereby effectively solving the problems of weak training content and single and incomplete fault simulation in traditional training systems.

[0033] The training evaluation unit includes a fault scenario database, a retrieval module, and a central control module. The retrieval module is connected to the fault simulation controller and matches the fault simulation commands received by the fault simulation controller with the data in the fault scenario database, then sends the matched data to the central control module for use. The multimedia unit includes an audio and video acquisition module. The output of the audio and video acquisition module is communicatively connected to the central control module to record the trainees' operation procedures and transmits the recorded operation procedure data to the central control module for comparison with the corresponding standardized fault processing procedure data received by the central control module. Specifically:

[0034] The audio and video acquisition module includes an audio acquisition module and a video acquisition module. The outputs of both modules are connected to the central control module. The inputs of the audio and video modules are connected to a microphone and a camera, respectively, to record the trainees' operational procedures. The recorded operational data is then transmitted to the central control module and compared with the fault scenario database received by the central control module. The fault scenario database includes fault scenario models established based on standardized fault handling procedures. These models include data on distribution network fault types and standardized handling procedures for corresponding distribution network faults performed by professionals. After receiving the trainees' operational data, the central processing module compares it with the received standardized handling procedure data to evaluate the training process and results. This helps trainees identify shortcomings, improve training effectiveness, and comprehensively evaluate trainees' operations and results, effectively meeting increasingly demanding training requirements. Example

[0035] The difference between Example 2 and Example 1 is that the standardized processing flow data includes standardized processing flow data for multiple job types. After receiving the operational flow data from the trainees, the central processing module compares it with the standardized processing flow data for the same job type in the received standardized processing flow data. The multimedia unit also includes an audio / video output module. The input end of the audio / video output module is connected to the central control module, and the output end of the audio / video output module is connected to a speaker and a display screen to play the intercom voice and operation video of the standardized processing flow data for other job types besides the trainees' job type in the standardized processing flow data received by the central control module.

[0036] The audio and video output module includes an audio output module and a video output module. The input terminals of both modules are connected to the central control module. The output terminals of the audio and video output modules are respectively connected to a speaker and a display screen to play the intercom voice and operation video received by the central control module. During training, the retrieval module matches the fault simulation commands received by the fault simulation controller with data in the fault scenario database. After sending the matched standardized processing flow data to the central control module, the central control module automatically executes the standardized operating procedures for personnel of different job types, based on the type of trainee and the sequence of standardized operating procedures for each job. This trains the trainees in improving their coordination with other personnel, enhancing their inter-professional cooperation skills, and preventing coordination errors during actual operations. Example

[0037] The difference between Example 3 and Example 2 is that, as Figure 3-5 As shown, each busbar in the control box 1 is connected to a rotary switch 2. The knob end of the rotary switch 2 extends outward from the control box. The rotary switch has three connection terminals. The first connection terminal 21 is connected to the busbar near the output terminal of the relay in the distribution network model unit via a lead wire. The second connection terminal 22 and the third connection terminal 23 are connected to the busbar near the load unit via a lead wire. The second connection terminal and the third connection terminal are normally connected. The knob end can be used to control the disconnection of the second connection terminal and the third connection terminal, so that the second connection terminal is connected to the first connection terminal. During the training process, when the trainees check and judge the busbar open circuit fault, they can quickly repair the corresponding busbar open circuit fault by using the rotary switch, thereby shortening the time for handling open circuit faults and allowing the trainees to have enough energy to actually handle other faults. Example

[0038] The difference between Example 4 and Example 3 is as follows: Figure 6As shown, the interactive terminal includes a dark box, inside which a bracket 31 is fixed vertically. A guide sleeve 32 is fixed horizontally on the top of the bracket. A ring signal disk 33 is coaxially fixed at the front end of the guide sleeve. Multiple sets of fault contact groups are evenly spaced along the circumference at the front end of the ring signal disk. The fault contact groups are connected to a fault simulation controller and are normally open. The fault simulation controller numbers each fault contact group according to the type of fault simulation. A control disk is rotatably mounted at the front end of the ring signal disk. A drive assembly is driven by the control end of the drive assembly, which extends outward from the dark box. A circuit terminal group is matched and installed at the end of the control disk facing the ring signal disk. The control end of the drive assembly can drive the control disk to rotate the circuit terminal group to control the on / off state of each fault contact group. Specifically:

[0039] The fault contact group includes two arc-shaped grooves 34 arranged radially at intervals. Electrode plates are provided in the arc-shaped grooves. The electrode plates are connected to the fault simulation controller through wires. When the two electrode plates of the same fault contact group are connected to form a circuit, the fault simulation controller will execute the corresponding fault simulation command according to the number of the fault contact group.

[0040] A fixed shaft 35 is slidably installed axially inside the guide sleeve, and the fixed shaft can rotate inside the guide sleeve. The front end of the fixed shaft 35 extends forward to form an annular disk, which is coaxially fixed with the control disk 36. A baffle 39 is installed at the tail end of the fixed shaft. A top spring 38 is fitted on the fixed shaft between the baffle and the guide sleeve. In its natural state, the top spring pushes the baffle backward, driving the fixed shaft to move the control disk backward, so that the control disk abuts against the annular signal plate. The access terminal includes two arc-shaped protruding terminals 37 fixed radially at intervals on the rear end face of the control disk. The two protruding terminals are connected together by a wire. When the two protruding terminals follow the rotation of the control disk and pass through the two arc-shaped grooves of the fault contact group, the two protruding terminals will enter the corresponding arc-shaped grooves respectively, so that the electrode plates in the two arc-shaped grooves are connected through the two protruding terminals. Since the protruding terminals are arc-shaped, when the control disk rotates and drives the protruding terminals to move out of the arc-shaped grooves, the protruding terminals will push the control disk forward along the inner wall of the arc-shaped grooves to move forward and cooperate with the protruding terminals to move out.

[0041] During use, because the control terminal of the drive component is located outside the dark box, trainees and training managers cannot observe the interaction between the control panel and the ring signal panel. As a result, they cannot know the types of faults simulated during the training. The types of faults simulated in the training are randomly selected by the training managers or trainees by driving the control panel to rotate through the drive component. This reduces the risk of cheating and further improves the training effect.

[0042] There are various types of drive components. For example, the outer ring surface of the control panel has teeth along the circumference. The drive component includes a drive motor fixedly installed on the top wall inside the dark box. The start and stop button of the drive motor is installed on the outside of the box. A drive gear is matched and installed on the motor shaft of the drive motor. The drive gear meshes with the outer ring teeth of the control panel, and the teeth on the outer ring surface of the control panel can slide along the axial direction of the teeth of the drive gear.

[0043] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A live-line working training system for power distribution networks, characterized in that... The system includes a distribution network model unit, a load unit, a fault simulation unit, a monitoring and display unit, an interactive terminal, a training and evaluation unit, and a multimedia unit. The monitoring and display unit is connected to the distribution network model unit and is used to monitor and display the operating status and key parameters of the distribution network model unit. The fault simulation unit includes a control cabinet, a fault simulation controller, and relays. The control cabinet has a number of busbars along its vertical direction, the same number as the number of output terminals of the distribution network model. The output terminals of the distribution network model unit are respectively connected to the load unit through corresponding busbars. The load unit is used to simulate power supply to users with different load types and capacities. Each busbar is equipped with... A relay controls the on / off state of the current busbar and its connection to the next busbar. The relay is connected to a fault simulation controller, which numbers the relays on the same busbar within the same control cabinet and can control the corresponding numbered relays to execute fault simulation commands. An interactive terminal is connected to the fault simulation controller and sends fault simulation commands to it. The training evaluation unit includes a fault scenario database, a retrieval module, and a central control module. The retrieval module is connected to the fault simulation controller and will retrieve fault simulation commands and fault scenario databases received by the controller. The system matches data from the database and sends the matched data to the central control module for use. The multimedia unit includes an audio / video acquisition module, the output of which is communicatively connected to the central control module. The interactive terminal includes a dark box, inside which a support is fixed vertically. A guide sleeve is fixed horizontally on the top of the support. A ring-shaped signal disk is coaxially fixed at the front end of the guide sleeve. Multiple sets of fault contact groups are evenly spaced along the circumference of the front end of the ring-shaped signal disk. The fault contact groups are connected to a fault simulation controller and are normally open. The fault simulation controller numbers each fault contact group according to the type of fault simulation. A control panel is rotatably mounted on the front end of the annular signal disk. The control panel is connected to a drive assembly. The control end of the drive assembly extends outward into a dark box. A terminal block is installed on the end of the control panel facing the annular signal disk. The fault contact group includes two radially spaced arc-shaped grooves. Electrode plates are provided in the arc-shaped grooves. The electrode plates are connected to the fault simulation controller through wires. A fixed shaft is slidably mounted axially inside the guide sleeve. The fixed shaft can rotate inside the guide sleeve. The front end of the fixed shaft extends forward into an annular disk and is fixed coaxially with the control panel. A baffle is installed at the tail end of the fixed shaft. A top spring is fitted on the fixed shaft between the baffle and the guide sleeve.

2. The power distribution network live-line operation training system according to claim 1, characterized in that, The audio and video acquisition module includes an audio acquisition module and a video acquisition module. The output terminals of both the audio and video acquisition modules are connected to the central control module. The input terminals of the audio and video acquisition modules are respectively connected to a microphone and a camera to record the operation process of the trainees and transmit the recorded operation process data to the central control module for comparison with the fault scenario database data received by the central control module.

3. The power distribution network live-line operation training system according to claim 2, characterized in that, The fault scenario database includes fault scenario models established based on standardized fault handling procedures. The fault scenario models include data on distribution network fault types and standardized handling procedures data of professionals when handling corresponding distribution network faults. After receiving the operation procedure data of the trainees, the central processing module compares it with the received standardized handling procedure data and judges the training operation process and results.

4. The power distribution network live-line operation training system according to claim 3, characterized in that, The standardized processing flow data includes standardized processing flow data for multiple job types. After receiving the operation flow data of the trainees, the central processing module compares it with the standardized processing flow data of the same job type in the received standardized processing flow data.

5. The power distribution network live-line operation training system according to claim 4, characterized in that, The multimedia unit also includes an audio and video output module. The input end of the audio and video output module is connected to the central control module, and the output end of the audio and video output module is connected to a speaker and a display screen to play the intercom voice and operation video of the standardized processing process data of other job types except for the training personnel in the standardized processing process data received by the central control module.

6. The power distribution network live-line operation training system according to claim 1, characterized in that, The power distribution network model unit includes a power supply module, a transformer module, and a distribution module. The power supply module is connected to the high-voltage side of the transformer module to simulate a high-voltage power supply. The input terminals of the distribution module are connected to the low-voltage side of the transformer module. The output terminals of the distribution module are connected to the load unit through corresponding busbars.

7. The power distribution network live-line operation training system according to claim 1, characterized in that, The control cabinet is equipped with a busbar frame for fixing the busbars.

8. The power distribution network live-line operation training system according to claim 1, characterized in that, Each busbar in the control box is connected to a rotary switch. The knob end of the rotary switch extends outward from the control box. The rotary switch has three connection terminals. The first connection terminal is connected to the busbar near the output terminal of the relay near the power distribution network model unit via a lead wire. The second and third connection terminals are connected to the busbar near the load unit via a lead wire. The second and third connection terminals are normally connected. The knob end can be used to control the disconnection of the second and third connection terminals, so that the second connection terminal is connected to the first connection terminal.

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