Teaching type 10kV cable fault simulation device
By designing a teaching-type 10kV cable fault simulation device, the problem of lack of cable fault diagnosis and training resources is solved, the flexibility and authenticity of fault simulation are achieved, and the practical capabilities of operation and maintenance personnel are improved.
Patent Information
- Application Number
- CN202510851072.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-24
- Publication Date
- 2025-08-15
AI Technical Summary
In the prior art, cable fault diagnosis training resources are scarce, high costs, and limited by site and climatic conditions, resulting in limited training results for operation and maintenance personnel.
Design a teaching-type 10kV cable fault simulation device, including a mobile metal box, a three-phase simulation unit, a control unit and a flashover adjustment unit, which can simulate broken wires, low resistance, high resistance and flashover faults in three-phase lines of A, B, and C, and supports phase separation settings. Through modular design and programmable control, the precise simulation and flexible combination of faults can be achieved.
It improves the practical ability of operation and maintenance personnel for fault diagnosis, has stable simulation effect and high security, supports the connection of multiple external devices, and enhances teaching interactivity and authenticity.
Smart Images
Figure CN120496388A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of power system training, in particular to a teaching type 10kV cable fault simulation device. Background Art
[0002] With the advancement of distribution network renovation and construction, power cables are becoming increasingly common in distribution systems. According to statistics, by 2024, the length of 10kV cables alone in use in these systems will exceed 30,000 kilometers, and continues to increase annually. However, the complex construction process and variable laying environments of these cables result in a high failure rate.
[0003] Currently, cable fault diagnosis relies primarily on field experience and instrument operation skills. However, complex and diverse fault waveforms, demanding high-tech detection techniques, and a lack of training resources and practical opportunities have limited training effectiveness. While some universities and businesses have attempted to establish fault simulation bases, high costs, long construction cycles, and limited site and climatic conditions have hindered widespread adoption.
[0004] The above information is presented as background information only to assist with an understanding of the present disclosure and is not a determination or admission that any of the above may be applicable as prior art with respect to the present disclosure. Summary of the Invention
[0005] The present invention provides a teaching type 10kV cable fault simulation device to solve the problems existing in the prior art.
[0006] To achieve the above object, the present invention provides the following technical solutions:
[0007] A teaching type 10kV cable fault simulation device, comprising:
[0008] Mobile metal box;
[0009] The three-phase simulation unit is used to simulate the disconnection fault, low resistance fault, high resistance fault and flashover fault in the three-phase lines A, B and C respectively;
[0010] A control unit, configured to select and control the three-phase simulation unit, and set the fault type, duration, and degree of the fault;
[0011] The flashover adjustment unit includes a plurality of flashover spheres and a sphere distance adjustment device, and is used to adjust the flashover breakdown voltage according to the system voltage.
[0012] In one embodiment, the device further includes a cable conductor connection unit, which is used to connect to an external test instrument to implement detection training.
[0013] In one embodiment, the three-phase simulation unit adopts a pluggable structure, and the fault simulation function is replaced and combined internally through a fault simulation board;
[0014] The control unit includes a digital control panel and a knob switch, which are used to control the simulation state of each phase and the specific parameter settings respectively.
[0015] In one embodiment, the flashover spheres in the flashover adjustment unit are provided with an adjustable distance structure, and the distance adjustment range is 1 mm to 10 mm.
[0016] In one embodiment, the high-resistance resistor unit adopts a plurality of parallel switching structures to form a high-resistance load in the range of 500Ω to 5kΩ;
[0017] The grounding resistance value of the high-resistance resistor unit is greater than 500Ω;
[0018] The resistance of the low-resistance resistor unit is less than 10Ω.
[0019] In one embodiment, a plurality of safety isolation cavities are provided inside the metal box, which are respectively used to accommodate a three-phase simulation unit, a control unit, a high-resistance resistor unit, a low-resistance resistor unit and a flashover adjustment unit. Each of the safety isolation cavities is provided with an independent metal shielding cover and an insulating protection structure.
[0020] In one embodiment, universal wheels and a brake structure are provided at the bottom of the box, and the overall center of gravity of the box is lower than 40 cm.
[0021] In one embodiment, the apparatus further includes an external interface unit for connecting to one or more external devices such as an oscilloscope, a fault locator, and an intelligent identification terminal teaching instrument.
[0022] In one embodiment, the control unit includes a mode switching circuit and a time delay module, the mode switching circuit is used to switch between the automatic trigger mode and the manual setting mode of the fault simulation, and the time delay module includes a programmable timing chip for setting the trigger delay parameters to control the excitation timing of the fault simulation.
[0023] In one embodiment, a status indication module is further included. The status indication module includes an LED display light, a buzzer alarm and an LCD display screen, which is used to indicate the current simulated fault type and system status in real time.
[0024] Compared with the prior art, the present invention has the following beneficial effects:
[0025] The present invention provides a teaching-type 10kV cable fault simulation device that can simulate various typical faults of 10kV cables within a length of less than 500 meters, covering four major categories: line break, low resistance, high resistance, and flashover. It also supports phase settings, improving operational flexibility and authenticity; the simulation effect is stable and highly safe, which helps to improve the practical fault diagnosis capabilities of operation and maintenance personnel.
[0026] The present invention has other features and advantages that will be apparent from or will be described in detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain certain principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0028] Figure 1 The diagram is a structural diagram of a teaching-type 10kV cable fault simulation device provided by an embodiment of the present invention.
[0029] Figure numerals: 10, mobile metal box; 20, three-phase simulation unit; 30, control unit; 40, flashover adjustment unit; 50, cable conductor connection unit; 90, high-resistance resistor unit; 100, low-resistance resistor unit; 160, external interface unit; 170, mode switching circuit; 180, time delay module; 200, status indication module. DETAILED DESCRIPTION
[0030] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects achieved by this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.
[0031] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.
[0032] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.
[0033] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.
[0034] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.
[0035] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.
[0036] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. In addition, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise clearly and specifically limited.
[0037] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.
[0038] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0039] Please refer to Figure 1 The embodiment of the present invention provides a teaching-type 10kV cable fault simulation device, comprising:
[0040] Mobile metal box 10;
[0041] The three-phase simulation unit 20 is used to simulate the disconnection fault, low resistance fault, high resistance fault and flashover fault in the three-phase lines A, B and C respectively;
[0042] The control unit 30 is used to select and control the three-phase simulation unit 20 and set the fault type, duration and fault severity;
[0043] The flashover adjustment unit 40 includes a plurality of flashover spheres and a sphere distance adjustment device, and is used to adjust the flashover breakdown voltage according to the system voltage.
[0044] In one embodiment, the simulation device further includes a cable conductor connection unit 50, which is used to connect to an external test instrument to implement detection training.
[0045] In this embodiment, modular three-phase simulation components are combined with adjustable flashover balls and high / low resistance modules to accurately restore and control typical cable faults, thereby supporting fault controllability and diversity. This is suitable for teaching and practical training, and significantly improves students' ability to identify faults and perform test operations.
[0046] The simulation device can simulate various typical faults of 10kV cables within a length of less than 500 meters, covering four categories: line break, low resistance, high resistance, and flashover. It also supports phase settings, improving operational flexibility and authenticity. The simulation effect is stable and highly safe, which helps to improve the practical fault diagnosis capabilities of operation and maintenance personnel.
[0047] Among them, low-resistance fault refers to a fault with a grounding resistance or fault point resistance value between 0.1Ω and 100Ω, and high-resistance fault refers to a fault with a grounding resistance or fault point resistance value between 100Ω and 10kΩ or even higher.
[0048] In one embodiment, the three-phase simulation unit 20 adopts a pluggable structure, and the fault simulation function is replaced and combined internally through a fault simulation board;
[0049] By using a modular board structure, each fault type can be independently arranged in a plug-in unit, which enhances the maintainability and scalability of the device. The fault type module can be freely replaced according to teaching needs.
[0050] The control unit 30 includes a digital control panel and rotary switches for controlling the simulated state of each phase and setting specific parameters. Because the flashover breakdown voltage is proportional to the ball spacing, adjusting the ball spacing allows for precise control of the flashover voltage, simulating discharges at different voltage levels and helping students understand the flashover breakdown mechanism and its hazardous characteristics.
[0051] In one embodiment, the flashover spheres in the flashover adjustment unit 40 are provided with an adjustable distance structure, and the distance adjustment range is 1 mm to 10 mm.
[0052] In one embodiment, the high-resistance resistor unit 90 adopts a plurality of parallel switching structures to form a high-resistance load in the range of 500Ω to 5kΩ.
[0053] The parallel structure supports providing different ground impedances while maintaining a safe voltage range, which helps to more accurately simulate the impact of ground resistance changes on ranging errors and test responses.
[0054] The grounding resistance value of the high-resistance resistor unit 90 is greater than 500Ω;
[0055] The resistance of the low-resistance resistor unit 100 is less than 10Ω.
[0056] In one embodiment, a plurality of safety isolation cavities are provided inside the metal box, which are respectively used to accommodate the three-phase simulation unit 20, the control unit 30, the high-resistance resistor unit 90, the low-resistance resistor unit 100 and the flashover adjustment unit 40, and each safety isolation cavity is provided with an independent metal shielding cover and insulating protection structure.
[0057] The physical isolation structure reduces electromagnetic interference between internal modules, improves operational safety, avoids the risks of short circuits and accidental touches, ensures user safety, and improves the long-term operational reliability of the equipment.
[0058] In one embodiment, the bottom of the box is equipped with universal wheels and a brake structure, and the overall center of gravity of the box is less than 40cm. The mobile chassis and low center of gravity design reduce the risk of tipping and facilitate indoor mobile training arrangements, thus supporting multi-classroom shared teaching and rapid deployment and drills.
[0059] In one embodiment, the apparatus further includes an external interface unit 160 for connecting to one or more external devices such as an oscilloscope, a fault locator, and an intelligent identification terminal teaching instrument. It is understood that this interface unit supports multi-standard cable access, enhancing interactive teaching, allowing students to connect to a variety of test instruments for practical training and improving their comprehensive testing application capabilities.
[0060] In one embodiment, the control unit 30 includes a mode switching circuit 170 and a time delay module 180. The mode switching circuit 170 is used to switch between the automatic trigger mode and the manual setting mode of the fault simulation. The time delay module 180 includes a programmable timing chip for setting the trigger delay parameters to control the excitation timing of the fault simulation.
[0061] Through delay control, fault gradual change simulation is achieved, which is close to the sudden / developing fault process in actual combat, making the training more in line with the on-site situation and improving the ability to respond to and judge emergencies.
[0062] In one embodiment, a status indication module 200 is further included. The status indication module 200 includes an LED display light, a buzzer alarm, and an LCD display screen, which is used to indicate the current simulated fault type and system status in real time.
[0063] Since the changes in fault modes are displayed in real time on the indication module, the level of visual teaching is improved, making it easier for teachers to supervise the students' operation process, intervene and correct errors in a timely manner, while also improving the intuitiveness and interactivity of teaching.
[0064] Compared with the prior art, the present invention has the following beneficial effects:
[0065] The present invention provides a teaching-type 10kV cable fault simulation device that can simulate various typical faults of 10kV cables within a length of less than 500 meters, covering four major categories: line break, low resistance, high resistance, and flashover. It also supports phase settings, improving operational flexibility and authenticity; the simulation effect is stable and highly safe, which helps to improve the practical fault diagnosis capabilities of operation and maintenance personnel.
[0066] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of protection of this application.
Claims
1. A teaching type 10kV cable fault simulation device, characterized in that: include: Mobile metal box; The three-phase simulation unit is used to simulate the disconnection fault, low resistance fault, high resistance fault and flashover fault in the three-phase lines A, B and C respectively; A control unit, configured to select and control the three-phase simulation unit, and set the fault type, duration, and severity; The flashover adjustment unit includes a plurality of flashover spheres and a sphere distance adjustment device, and is used to adjust the flashover breakdown voltage according to the system voltage.
2. The teaching type 10kV cable fault simulation device according to claim 1 is characterized in that: It also includes a cable wire connection unit, which is used to connect to an external test instrument to implement detection training.
3. The teaching type 10kV cable fault simulation device according to claim 1, characterized in that: The three-phase simulation unit adopts a pluggable structure, and the fault simulation board is used internally to realize the replacement and combination of fault simulation functions; The control unit includes a digital control panel and a knob switch, which are used to control the simulation state of each phase and the specific parameter settings respectively.
4. The teaching type 10kV cable fault simulation device according to claim 1, characterized in that: The flashover spheres in the flashover adjustment unit are provided with an adjustable distance structure, and the distance adjustment range thereof is 1 mm to 10 mm.
5. The teaching type 10kV cable fault simulation device according to claim 1, characterized in that: The high-resistance resistor unit adopts a multi-group parallel switching structure to form a high-resistance load in the range of 500Ω to 5kΩ; The grounding resistance value of the high-resistance resistor unit is greater than 500Ω; The resistance of the low-resistance resistor unit is less than 10Ω.
6. The teaching type 10kV cable fault simulation device according to claim 1, characterized in that: A plurality of safety isolation cavities are provided inside the metal box, which are respectively used to accommodate the three-phase simulation unit, the control unit, the high-resistance resistor unit, the low-resistance resistor unit and the flashover adjustment unit. Each of the safety isolation cavities is provided with an independent metal shielding cover and an insulating protection structure.
7. The teaching type 10kV cable fault simulation device according to claim 1, characterized in that: The bottom of the box is provided with universal wheels and a brake structure, and the overall center of gravity of the box is lower than 40 cm.
8. The teaching type 10kV cable fault simulation device according to claim 1, characterized in that: The device also includes an external interface unit for connecting one or more external devices such as an oscilloscope, a fault locator and an intelligent identification terminal teaching instrument.
9. The teaching type 10kV cable fault simulation device according to claim 1, characterized in that: The control unit includes a mode switching circuit and a time delay module. The mode switching circuit is used to switch between the automatic trigger mode and the manual setting mode of the fault simulation. The time delay module includes a programmable timing chip for setting the trigger delay parameters to control the excitation timing of the fault simulation.
10. The teaching type 10kV cable fault simulation device according to claim 1, characterized in that: It also includes a status indication module, which includes an LED display light, a buzzer alarm and an LCD display screen, and is used to prompt the current simulated fault type and system status in real time.