Power cable intelligent operation and maintenance sandbox simulation system, simulation method, equipment and medium

Abstract

The present invention provides a sandbox simulation system, simulation method, equipment and medium for intelligent operation and maintenance of power cables. The system includes: a sandbox, outdoor cable terminal heads respectively arranged at both ends of the sandbox, at least two switching cabinets arranged between the outdoor cable terminal heads, and a cable arrangement area arranged under the sandbox; the outdoor cable terminal heads are used to connect detection equipment; the switching cabinet is used to switch the miniature cable length and defect short samples; the cable arrangement area is provided with a plurality of miniature cables, and the miniature cables are used to connect the outdoor cable terminal heads and the switching cabinet. The sandbox simulation system provided by the present invention not only has the advantages of small investment, good flexibility, easy operation, and wide adaptability to scenarios, but also based on the system and the corresponding simulation method, it can solve the problems of intelligent operation and maintenance equipment training for power cable lines and quality control of intelligent operation and maintenance devices for grassroots operation and maintenance personnel, and further improve the convenience and reliability of power cable operation and maintenance simulation.

Description

Technical Field

[0001] The present invention relates to the technical field of cable system testing, and in particular to a power cable intelligent operation and maintenance sandbox simulation system, simulation method, equipment and medium. Background Art

[0002] Power cable is a key device that connects power plants, substations, power supply and distribution equipment and power users in the power industry system into an organic whole. Whether it can operate normally will directly affect whether the entire power industry system can operate normally and stably. However, power cables are easily affected by abnormal events such as overload, overvoltage, internal insulation aging, and natural environment during actual operation. Therefore, it is very necessary to detect abnormalities in power cables. At the same time, building a power cable intelligent operation and maintenance simulation system and verifying the corresponding functions have also become essential key skills for every intelligent operation and maintenance personnel. Conventional power cable intelligent operation and maintenance simulation systems generally use real power cables to simulate the actual laying environment of power cables for actual laying, and set a certain number of defect points in the simulation line for personnel training and equipment function verification of power cable intelligent operation and maintenance equipment, that is, using real power cables to build a power cable intelligent operation and maintenance simulation system according to the actual line, by presetting the defects of cables and accessories, installing corresponding intelligent operation and maintenance devices in the line, and using power frequency, variable frequency, oscillation wave and other pressure equipment to apply corresponding voltages at the cable terminals for personnel training and equipment function verification of intelligent operation and maintenance devices. However, cable fault detection training and assessment by simply destroying the main insulation of the actual cable and artificially creating fault points will bring many on-site difficulties to the fault testing training work because the nature and distance of the fault are fixed and single, and the nature of the fault will slowly change unpredictably with time and irregular discharge, such as high resistance becoming low resistance, low resistance becoming broken line, etc.

[0003] Although with the advancement of digital transformation in the production field of power grid companies, more and more digital intelligent means are put into use in the operation and maintenance of power transmission and transformation equipment, which can solve the above problems to a certain extent, the use of a large number of intelligent operation and maintenance means and new technologies puts forward high requirements on the level of grassroots operation and maintenance personnel that are difficult to meet: on the one hand, there are many types of digital equipment and the technical principles are profound, which requires operation and maintenance personnel to master a certain theoretical foundation before they can operate; on the other hand, the mastery of new equipment and new technologies requires a lot of experience accumulation, and many grassroots units lack similar operation and maintenance platforms, so it is difficult to accumulate experience. In addition, the quality of digital intelligent operation and maintenance equipment on the market is uneven, which adds a lot of extra work to the use and maintenance of equipment by operation and maintenance personnel, making some intelligent monitoring devices "useless" and not playing a real role in intelligent operation and maintenance.

[0004] Therefore, there is an urgent need to provide an intelligent operation and maintenance system for power cables with low investment, good flexibility, easy operation, and adaptability to a wide range of scenarios, so as to effectively solve the problems of intelligent operation and maintenance equipment training for power cable lines and quality control of intelligent operation and maintenance systems for grassroots operation and maintenance personnel, and improve the convenience and reliability of actual power cable operation and maintenance simulation. Summary of the invention

[0005] The purpose of the present invention is to provide a power cable intelligent operation and maintenance sandbox simulation system, simulation method, equipment and medium. By adopting a new type of cable with a miniature size and full structure, combined with the simulation sandbox technology, a set of intelligent operation and maintenance sandbox simulation system can be constructed, which can fully simulate the real cable laying site, can be arranged indoors and has a wide range of application scenarios. The power cable operation can be truly pressurized, and the volume of the simulation system can be reduced, the investment cost can be reduced, the panoramic topology of the power cable can be intuitively presented, and it is suitable for batch construction; in addition, through the matching multi-terminal remote control intelligent switching device, the cable length is switched according to actual requirements, the key parameters such as the defect type and defect location are changed, and the corresponding operation and maintenance simulation method is used to effectively simulate the operation and maintenance faults, which effectively solves the problem of intelligent operation and maintenance equipment training for power cable lines and quality control of intelligent operation and maintenance systems for grassroots operation and maintenance personnel, and improves the convenience and reliability of actual power cable operation and maintenance simulation.

[0006] In order to achieve the above objectives, it is necessary to provide a power cable intelligent operation and maintenance sandbox simulation system, simulation method, computer equipment and storage medium in response to the above technical problems.

[0007] In a first aspect, an embodiment of the present invention provides a power cable intelligent operation and maintenance sandbox simulation system, the system comprising a sandbox, outdoor cable terminal heads respectively arranged at both ends of the sandbox, at least two switching cabinets arranged between the outdoor cable terminal heads, and a cable arrangement area arranged under the sandbox;

[0008] The outdoor cable terminal head is used to connect the detection equipment;

[0009] The switching cabinet is used to switch the miniature cable length and the defective short sample;

[0010] The cable arrangement area is provided with a plurality of miniature cables, and the miniature cables are used to connect the outdoor cable terminal head and the switching cabinet.

[0011] Further, the detection equipment includes a cable core detection equipment and a shielding layer detection equipment;

[0012] The cable core detection equipment includes at least one of an oscillating wave partial discharge measurement device, a variable frequency series resonance test device, an ultra-low frequency dielectric loss detection instrument, a power frequency withstand voltage test equipment, and a cable fault flash detector;

[0013] The shielding layer detection device includes at least one of a partial discharge detection device, a ground loop current detection device, and an online fault detection device.

[0014] Further, the switching cabinet includes a cable length switching device, a defective short sample switching device and a defective short sample;

[0015] The cable length switching device is used to switch the miniature cable length between the outdoor cable terminal heads;

[0016] The defective short sample switching device is used to execute the connection or disconnection of the defective short sample;

[0017] The defect short samples include cable fault defect short samples and cable partial discharge defect short samples.

[0018] Further, the cable length switching device includes a cable length switching switch, a first WIFI processor, a first photoelectric isolation module, a first action device and a first state feedback device;

[0019] The cable length switching switch is used to switch the miniature cables of different lengths to access the system lines;

[0020] The first WIFI processor is used to receive a first switching signal from a control terminal, and according to the first switching signal, control the first action device through the first photoelectric isolation module to drive the cable length switch to perform a switching action, and obtain a first state feedback value of the first state feedback device and send it to the control terminal;

[0021] The first photoelectric isolation module includes a photoelectric coupler and a micro photoelectric sensor; the photoelectric coupler is used to control the first action device according to the first switching signal; the micro photoelectric sensor is used to collect the first state feedback value fed back by the first state feedback device, and transmit the first state feedback value to the first WIFI processor;

[0022] The first state feedback device is used to obtain the position state of the cable length switch and generate the first state feedback value according to the position state.

[0023] Furthermore, the cable length switching switch includes an insulating connecting rod and a metal connecting rod connected to the first actuating device in sequence, and a plurality of non-corona contacts sleeved on the insulating connecting rod and the metal connecting rod; the non-corona contacts are used to connect the corresponding miniature cables and are connected to the metal connecting rod by rotating the first actuating device.

[0024] Furthermore, the defective short sample switching device includes a many-to-one non-partial discharge switching switch, a second WIFI processor, a second photoelectric isolation module, a second action device, a second state feedback device and an analog circuit;

[0025] The many-to-one non-partial discharge switching is used to switch the connection between the analog line and the defective short sample;

[0026] The second WIFI processor is used to receive a second switching signal from the control terminal, communicate with the control terminal, and control the second action device to drive the many-to-one non-partial discharge switching switch to perform a switching action through the second photoelectric isolation module according to the second switching signal, and obtain the second state feedback value of the second state feedback device and send it to the control terminal;

[0027] The second photoelectric isolation module includes a photoelectric coupler and a micro photoelectric sensor; the photoelectric coupler is used to control the second action device according to the second switching signal; the micro photoelectric sensor is used to collect the second state feedback value fed back by the second state feedback device, and transmit the second state feedback value to the second WIFI processor;

[0028] The second state feedback device is used to obtain the position state of the many-to-one non-partial discharge switching switch and generate the second state feedback value according to the position state.

[0029] Furthermore, the many-to-one non-partial discharge switching switch comprises a transmission conversion gear, an insulating connecting rod and a switching turntable connected to the second actuating device in sequence, and a non-partial discharge contact, a high-voltage end metal connecting rod, a defective short sample joint and a grounding end metal connecting rod connected to the switching turntable;

[0030] The defective short sample connector is used to connect the simulation circuit arranged in the middle of the switching turntable, and control the transmission conversion gear to drive the insulating connecting rod and the switching turntable to rotate through the second action device, so that any non-partial discharge contact under the switching turntable is connected to the high-voltage end metal connecting rod;

[0031] The high-voltage end metal connecting rod is used to connect the analog circuit located in the middle of the switching turntable to any non-partial discharge contact located under the switching turntable;

[0032] The grounding metal connecting rod is used to connect a non-partial discharge contact that is not connected to the analog circuit.

[0033] In a second aspect, an embodiment of the present invention provides a power cable intelligent operation and maintenance sandbox simulation method for the power cable intelligent operation and maintenance sandbox simulation system according to any one of claims 1 to 7, the method comprising the following steps:

[0034] Pre-establishing a communication connection with a control terminal;

[0035] receiving a switching signal of the control terminal; the switching signal includes at least one of a first switching signal and a second switching signal; the second switching signal includes at least one of a fault defect short sample switching signal and a partial discharge defect short sample switching signal;

[0036] Determine whether the switching signal includes the first switching signal, and if so, obtain the length of the line to be switched, and perform a switching action through a cable length switching device of a switching cabinet according to the length of the line to be switched;

[0037] Determine whether the switching signal includes the second switching signal; if so, obtain the corresponding defect short sample to be switched according to the type of the second switching signal, and perform a switching action through a defect short sample switching device of the switching cabinet according to the defect short sample to be switched; the defect short sample to be switched includes at least one of a cable fault defect short sample and a cable partial discharge defect short sample;

[0038] In response to the completion of the switching actions corresponding to the first switching signal and the second switching signal, according to the intelligent operation and maintenance simulation requirements, the detection equipment and the intelligent operation and maintenance device are connected to perform corresponding operation and maintenance simulation.

[0039] In a third aspect, an embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0040] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0041] The above-mentioned present application provides a power cable intelligent operation and maintenance sandbox simulation system, simulation method, computer equipment and storage medium, by providing a sandbox, outdoor cable terminal heads respectively provided at both ends of the sandbox to connect the detection equipment, at least two switching cabinets provided between the outdoor cable terminal heads for switching the miniature cable length and defect short samples, and a cable arrangement area provided under the sandbox with a plurality of miniature cables for connecting the outdoor cable terminal heads and the switching cabinet, the intelligent operation and maintenance system and the corresponding simulation method have the advantages of small investment, good flexibility, easy operation, and wide adaptability to scenarios. Compared with the prior art, the present invention can effectively solve the problem of training of power cable line intelligent operation and maintenance equipment and quality control of intelligent operation and maintenance devices for grassroots operation and maintenance personnel, and further improve the convenience and reliability of actual power cable operation and maintenance simulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of a power cable intelligent operation and maintenance sandbox simulation system in an embodiment of the present invention;

[0043] Figure 2 is a schematic structural diagram of a miniature cable in an embodiment of the present invention;

[0044] Figure 3 is a schematic diagram of the structure of a switching cabinet in an embodiment of the present invention;

[0045] Figure 4 yes Figure 3 Schematic diagram of the structure of the cable length switching device in the switching cabinet;

[0046] Figure 5 yes Figure 4 A schematic diagram of the structure of a cable length switching switch in a cable length switching device;

[0047] Figure 6 Schematic diagram of an application scenario of a cable length switching device according to an embodiment of the present invention;

[0048] Figure 7 yes Figure 3 Schematic diagram of the architecture of the defective short sample switching device in the switching cabinet;

[0049] Figure 8 yes Figure 3 Structural schematic diagram of defective short sample switching device in switching cabinet;

[0050] Fig. 9 yes Figure 8 A schematic diagram of the structure of a many-to-one non-partial discharge switching switch in a defect short sample switching device;

[0051] Fig.10 It is a schematic diagram of the process of the power cable intelligent operation and maintenance sandbox simulation method in an embodiment of the present invention;

[0052] Fig.11 It is a diagram of the internal structure of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and beneficial effects of the present application clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the embodiments described below are part of the embodiments of the present invention and are only used to illustrate the present invention, but are not used to limit the scope 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.

[0054] The present invention provides a Figure 1 The power cable intelligent operation and maintenance sandbox simulation system shown in the figure adopts Figure 2The new type of cable with a miniature size and full structure (i.e., miniature cable) shown in the figure is combined with the simulation sandbox technology to build a set of intelligent operation and maintenance simulation sandbox devices that can fully simulate the operation of power cables at the real cable laying site. The system adopts a new type of miniature cable, which can not only ensure the support of real pressurization, but also reduce the volume of the system device, greatly reducing the investment cost; at the same time, due to the use of a sandbox design, the system device can not only intuitively present the panoramic topological structure of the power cable, but also the layout scene is not restricted, it can be assembled indoors and outdoors at any time, and when arranged indoors, it can be operated all day without being affected by the weather, with good application effect, support for random movement, and suitable for batch construction; in addition, the system device is equipped with a switching cabinet that can be remotely controlled by a control terminal, which can realize intelligent switching according to the actual simulation requirements according to the required switching cable length, changing the defect type, defect location and other key parameters to support the corresponding simulation experiment, effectively improving the convenience and reliability of the intelligent operation and maintenance simulation of the power cable. The following embodiment will explain the power cable intelligent operation and maintenance sandbox simulation system and the corresponding operation and maintenance method in detail.

[0055] In one embodiment, Figure 1 As shown, a power cable intelligent operation and maintenance sandbox simulation system is provided, the system comprising a sandbox 1, outdoor cable terminal heads 2 respectively arranged at both ends of the sandbox, at least two switching cabinets 3 arranged between the outdoor cable terminal heads, and a cable arrangement area arranged under the sandbox;

[0056] The outdoor cable terminal head 2 is used to connect the detection equipment;

[0057] The switching cabinet 3 is used to switch the miniature cable length and the defective short sample;

[0058] The cable arrangement area is provided with a plurality of miniature cables 4 , and the miniature cables are used to connect the outdoor cable terminal head 2 and the switching cabinet 3 .

[0059] Among them, the structure of the miniature cable 4 is as follows Figure 2 As shown, the corresponding scaling method can be scaled according to actual needs in principle. The preferred scaling method of this embodiment is not to scale in the same proportion, but to appropriately reduce the main insulation 43 to a size that can ensure real pressurization and no partial discharge according to the application requirements. If the peak 30kV AC voltage is met, the main insulation thickness can be reduced to a thickness of about 2.5-3mm, and the conductor 41 can be greatly reduced accordingly, keeping the cross-section at 4-10 square millimeters. At the same time, the thickness of the inner semi-conductive shielding layer 42, the outer semi-conductive shielding layer 44, the copper wire shielding layer 45 and the outer sheath 46 can remain unchanged, and only need to be adjusted accordingly according to the size set for the main insulation 43 and the conductor 41. It should be noted that the relevant dimensional values ​​of the internal structure of the miniature cable 4 given above are only exemplary descriptions and are not limited to the specific protection range.

[0060] The outdoor cable terminal head 2 is an accessory corresponding to the miniature cable 4, and its main function is to uniform the electric field and prevent discharge. Usually, the outdoor cable terminal head 2 is directly connected to the pressure device, and the wire core of the outdoor cable terminal head 2 is directly connected to the high-voltage end of the pressure device. If partial discharge is required, it is necessary to add a corona-proof equalizing cap, and the shielding layer of the cable is connected to the ground of the high-voltage device. The outdoor cable terminal head 2 of this embodiment is used to connect the detection device, which can be connected to the pressure device first and then to the detection device, or it can be directly connected to the detection device integrated with the pressure device. The selection of the specific connection method is determined according to the type of detection device actually selected, and it has no fundamental effect on the main functional structure of the system of the present invention, and is not specifically limited here. In addition, since the cable adopts a new miniature cable 4, the corresponding outdoor cable terminal head 2 also needs to make adaptive adjustments according to the actual size of the miniature cable and its original structure. The outdoor cable terminal head 2 is a fully prefabricated silicone rubber terminal, and the external dimensions meet the adaptation requirements of the miniature cable 4 size, and the stress cone part is designed according to the peak value of the AC voltage used for simulation, and it only needs to ensure that the field strength at the outer semi-conductive fracture meets the partial discharge requirements.

[0061] The detection equipment connected to the outdoor cable terminal head 2 is selectively connected to one or more according to the needs of the actual operation and maintenance simulation. The detection equipment in this embodiment is not shown in the structural diagram of the power cable intelligent operation and maintenance sandbox simulation system. It mainly includes cable core detection equipment and shielding layer detection equipment; the cable core detection equipment mainly includes at least one of an oscillation wave partial discharge measurement device, a variable frequency series resonance test device, an ultra-low frequency dielectric loss detection instrument, a power frequency withstand voltage test equipment and a cable fault flash detector; the shielding layer detection equipment includes at least one of a partial discharge detection device, a ground loop current detection device, and an online fault detection device. Specifically, when building the system device of the present invention, it can be determined whether to connect the cable core detection equipment and the shielding layer detection equipment according to the needs. At the same time, the specific type and quantity of the cable core detection equipment and the shielding layer detection equipment to be connected can be selected according to the needs. In addition, the outdoor cable terminal head 2 can be preferably a plug-in intermediate joint, which is convenient for connection and use on the basis of ensuring that the corresponding AC voltage peak requirements are met.

[0062] In one embodiment, Figure 3 As shown, the switch cabinet 3 mainly includes a cable length switching device 31, a defective short sample switching device 32 and a defective short sample 33. The cable length switching device 31 is used to switch the miniature cable length between the outdoor cable terminal heads; the defective short sample switching device 32 is used to execute the connection or disconnection of the defective short sample.

[0063] Specifically, Figure 4As shown, the cable length switching device 31 mainly includes a cable length switching switch 3101, a first WIFI processor 3102, a first photoelectric isolation module 3103, a first action device 3104 and a first state feedback device 3105; wherein the first action device 3104 and the first state feedback device 3105 are connected to the first WIFI processor 3102 via the first photoelectric isolation module 3103.

[0064] The cable length switching switch 3101 is used to switch the miniature cables of different lengths to access the system line;

[0065] The cable length switch 3101 is as follows: Figure 5 As shown, it mainly includes an insulating connecting rod 3109 and a metal connecting rod 3110 connected in sequence with the first action device 3104, and a plurality of non-dizzy contacts 3111 sleeved on the insulating connecting rod 3109 and the metal connecting rod 3110; the non-dizzy contacts 3111 are used to connect the corresponding miniature cables 4, and are connected to the metal connecting rod 3110 by rotating the first action device 3104. It should be noted that the first action device 3104 and the insulating connecting rod 3109 constitute a telescopic rod similar to that in a motor, and the metal connecting rod 3110 is connected to different non-dizzy contacts 3111 through its telescopic extension to control the access of different miniature cables, thereby adjusting the length of the miniature cables in the system line.

[0066] The first WIFI processor 3102 is used to receive a first switching signal from a control terminal, and according to the first switching signal, control the first action device 3104 through the first photoelectric isolation module 3103 to drive the cable length switch 3101 to perform a switching action, and obtain a first state feedback value of the first state feedback device 3105 and send it to the control terminal;

[0067] The control terminal can be understood as a terminal device such as a mobile phone, tablet or computer that can remotely control the cable length switching device 31 to perform corresponding miniature cable length adjustment by transmitting the first switching signal. The first WIFI processor 3102 is connected to the cloud server via WIFI, and the cloud server controls its communication connection with the remote control terminal.

[0068] The first photoelectric isolation module 3103 includes a photoelectric coupler and a micro photoelectric sensor; the photoelectric coupler is used to control the first action device 3104 according to the first switching signal; the micro photoelectric sensor is used to collect the first state feedback value fed back by the first state feedback device 3105, and transmit the first state feedback value to the first WIFI processor 3102;

[0069] The first photoelectric isolation module 3103 is mainly used to protect the first WIFI processor 3102 connected thereto from the impact from the high voltage end, thereby improving the stability of signal transmission.

[0070] The first state feedback device 3105 is used to obtain the position state of the cable length switch 3101 and generate the first state feedback value according to the position state.

[0071] Among them, the first state feedback value mainly includes the values ​​corresponding to the intermediate state and the in-place state, wherein the intermediate state indicates that the switch is in action, and the in-place state indicates that the switch is in place. The first state feedback device 3105 micro photoelectric sensor feeds back the collected first state feedback values ​​corresponding to different switch states to the control terminal through the first WIFI processor 3102, and the control terminal understands the actual state of the current cable length switching switch 3101 according to the first state feedback value, and is used to determine whether it is necessary to give a corresponding switch indication (first switching signal), and to work together with the first action device to better adjust the length of the miniature cable to meet the requirements of the simulation system.

[0072] like Figure 6 As shown, the structural state of the cable length switching device 31 in the actual application of the power cable intelligent operation and maintenance sandbox simulation system loop is: cable segment I 3106, cable segment II 3107, cable segment III 3108, and cable segment IV 3109 are all miniature cables, and the left and right cable length switching switches can simultaneously select cable segment II 3107 or cable segment III 3108, and the miniature cable length is switched by switching to cable segment II 3107 or cable segment III 3108. Figure 6The lengths of cable segments I-IV are respectively recorded as L1-L4, and are driven by the first action devices 3104 corresponding to the left and right cable length switching switches 3101, and the corresponding first state feedback devices 3105 respectively judge the working states of the respective first action devices 3104, so that the dizziness-free contacts 3111 connected to different cable lines can be brought into contact with the metal connecting rod 3110 by respectively rotating the first action devices 3104 in the two cable length switching devices 31, such as adjusting the metal connecting rod 3110 to contact with cable segment II 3107 or cable segment III 3108, thereby achieving the length of the entire cable section being switchable between L1+L2+L4 and L1+L3+L4, thereby ensuring good safety performance. It should be noted that the above switchable cable lengths are only exemplary descriptions corresponding to two switch cabinets in the system. The switchable lengths in the actual power cable intelligent operation and maintenance sandbox simulation system are related to the number of switch cabinets actually equipped. For example, when there are two switch cabinets, there are two length modes; when there are three switch cabinets, there are four length modes; when there are four switch cabinets, there are eight length modes; and so on. When the number of switch cabinets in the system is n, the switchable length mode is 2. n-1 kind.

[0073] Specifically, Figure 7 As shown, the defective short sample switching device 32 mainly includes a many-to-one non-partial discharge switching switch 3201, a second WIFI processor 3202, a second photoelectric isolation module 3203, a second action device 3204, a second state feedback device 3205 and an analog circuit 3206;

[0074] The many-to-one non-partial discharge switch 3201 is used to switch the connection between the analog line 3206 and the defective short sample 33;

[0075] Among them, the type and quantity of defective short samples 33 can be determined according to actual needs, such as Figure 7 As shown, 6 types of defect short samples 3301-3306 are preset in the sandbox simulation system. In actual simulation applications, corresponding defect short samples 33 can be set in the corresponding simulation circuit 3206 according to requirements. Figure 7 The number of defective short samples shown is for illustrative purposes only and is not intended to limit the specific number.

[0076] The second WIFI processor 3202 is used to receive a second switching signal from the control terminal, communicate with the control terminal, and control the second action device 3204 to drive the many-to-one non-partial discharge switch 3201 to perform a switching action through the second photoelectric isolation module 3203 according to the second switching signal, and obtain the second state feedback value of the second state feedback device 3205 and send it to the control terminal;

[0077] Among them, the control terminal can be understood as a terminal device such as a mobile phone, tablet or computer that can remotely control the defect short sample switching device 32 to perform the corresponding defect short sample switching by transmitting the second switching signal. The second WIFI processor 3202 is connected to the cloud server via WIFI, and the cloud server controls its communication connection with the remote control terminal. The second switching signal should correspond to the corresponding defect short sample type, mainly including a fault defect short sample switching signal and a partial discharge defect short sample switching signal. The second WIFI processor 3202 identifies the defect short sample to be switched according to the content of the received second switching signal, and drives the multi-to-one non-partial discharge switching switch 3201 through the second action device 3204 to perform the corresponding switching action according to the defect short sample to be switched, so as to realize the access of the cable fault defect short sample or cable partial discharge defect short sample required for the simulation experiment at the corresponding position of the simulation line of the sandbox simulation system.

[0078] The second photoelectric isolation module 3203 includes a photoelectric coupler and a micro photoelectric sensor; the photoelectric coupler is used to control the second action device 3204 according to the second switching signal; the micro photoelectric sensor is used to collect the second state feedback value fed back by the second state feedback device 3205, and transmit the second state feedback value to the second WIFI processor 3202;

[0079] The second photoelectric isolation module 3203 is mainly used to protect the second WIFI processor 3202 connected thereto from the impact from the high voltage end, thereby improving the stability of signal transmission.

[0080] The second state feedback device 3205 is used to obtain the position state of the many-to-one non-partial discharge switching switch 3201 and generate the second state feedback value according to the position state.

[0081] Among them, the second state feedback value mainly includes the values ​​corresponding to the intermediate state and the in-place state, wherein the intermediate state indicates that the switch is in action, and the in-place state indicates that the switch is in place. The second state feedback device 3205 micro photoelectric sensor feeds back the collected second state feedback values ​​corresponding to different switch states to the control terminal through the second WIFI processor 3202, and the control terminal understands the actual state of the many-to-one non-partial discharge switching switch 3201 according to the second state feedback value, which is used to determine whether the corresponding switch indication (second switching signal) needs to be given, and is linked with the second action device to better realize the connection of different defect short samples to meet the needs of the simulation system.

[0082] like Figure 8-9As shown, the many-to-one non-partial discharge switching switch 3201 mainly includes a transmission conversion gear 3207, an insulating connecting rod 3208 and a switching turntable 3209 connected to the second action device 3204 in sequence, and a non-partial discharge contact 3210, a high-voltage end metal connecting rod 3211, a defective short sample joint 3212 and a grounding end metal connecting rod 3213 connected to the switching turntable 3209;

[0083] The defective short sample connector 3212 is used to connect the simulation circuit 3206 located in the middle of the switching turntable 3208, and control the transmission conversion gear 3207 through the second action device 3204 to drive the insulating connecting rod 3208 and the switching turntable 3209 to rotate, so that any non-partial discharge contact 3210 provided under the switching turntable 3209 is connected to the high-voltage end metal connecting rod 3211;

[0084] The high-voltage end metal connecting rod 3211 is used to connect the analog circuit 3206 located in the middle of the switching turntable 3209 to any non-partial discharge contact 3210 located under the switching turntable 3209;

[0085] The grounding metal connecting rod 3213 is used to connect the non-partial discharge contact 3210 that is not connected to the analog circuit 3206.

[0086] Specifically, Figure 8 As shown, the transmission conversion gear 3207, the insulating connecting rod 3208, the switching turntable 3209, the non-partial discharge contact 3210, the high-voltage end metal connecting rod 3211, the defective short sample joint 3212, the grounding end metal connecting rod 3213, the switching turntable 3209, the second photoelectric isolation module 3203, the second action device 3204, and the second state feedback device 3205 are collectively arranged in the same area, and the second action device 3204 drives the insulating connecting rod 3208 and the switching turntable 3209 to rotate as a whole through the transmission conversion gear 3207. At the same time, four non-partial discharge contacts 3210 are set under the four quadrant points corresponding to the switching turntable 3209, and the analog circuit 3206 in the middle position of the switching turntable 3209 is connected to any non-partial discharge contact 3210 through the high-voltage end metal connecting rod 3211, and the remaining non-partial discharge contacts 3210 are connected by the grounding end metal connecting rod 3213 to ensure that when the analog circuit 3206 is connected to any defective short sample connector 3212, the remaining defective short samples are in a grounding state, effectively ensuring the safety performance of the many-to-one non-partial discharge switching switch 3201. It should be noted that the number and position of the non-partial discharge contacts under the above-mentioned switching turntable 3209 can be related to the number of defective short samples required by actual application requirements.

[0087] In addition, in order to ensure the authenticity, safety and integrity of the actual intelligent operation simulation, the corresponding simulation environment and the fence 5 set around the sandbox can be set as needed on the sandbox of the system. Specifically, the simulation environment includes at least one geographical environment scaled according to a preset ratio. For example, one or more of the rivers, mountains, roads, etc. where the cables are actually laid can be scaled down on the sandbox according to the actual user's application needs, and the geographical environment simulated by the sandbox can be universal, that is, it can be used on different sandboxes to achieve the same application effect; at the same time, the fence 5 around the sandbox can be used as the boundary of the sandbox and as a safety fence, which well ensures the integrity and safety of the power cable intelligent operation and maintenance sandbox simulation system.

[0088] The present embodiment provides a set of intelligent operation and maintenance simulation sandbox device that can fully simulate the operation of power cables at a real cable laying site using miniature cables combined with simulation sandbox technology. It not only has the advantages of small size, low investment, good flexibility, easy operation, no influence from weather and usage location, and adaptability to a wide range of scenarios, but can also switch cable lengths according to actual simulation requirements, change key parameters such as defect types and defect locations, and perform intelligent switching to support corresponding simulation experiments, effectively improving the convenience and reliability of intelligent operation and maintenance simulation of power cables, and thus effectively solving the problem of training of grassroots operation and maintenance personnel on intelligent operation and maintenance equipment for power cable lines and quality control of intelligent operation and maintenance devices.

[0089] In one embodiment, Fig.10 As shown, a power cable intelligent operation and maintenance sandbox simulation method applied to a power cable intelligent operation and maintenance sandbox simulation system is provided, and the method comprises the following steps:

[0090] S11, pre-establishing a communication connection with a control terminal;

[0091] S12, receiving a switching signal of the control terminal; the switching signal includes at least one of a first switching signal and a second switching signal; the second switching signal includes at least one of a fault defect short sample switching signal and a partial discharge defect short sample switching signal;

[0092] S13, determining whether the switching signal includes the first switching signal, and if so, obtaining the length of the line to be switched, and performing a switching action through a cable length switching device of a switching cabinet according to the length of the line to be switched;

[0093] S14, judging whether the switching signal includes the second switching signal, and if so, obtaining the corresponding defect short sample to be switched according to the type of the second switching signal, and performing a switching action through the defect short sample switching device of the switching cabinet according to the defect short sample to be switched; the defect short sample to be switched includes at least one of a cable fault defect short sample and a cable partial discharge defect short sample;

[0094] The identification order of the cable fault defect short sample and the cable partial discharge defect short sample types in the second switching signal does not affect the simulation effect in principle, and the identification order is not specifically limited here.

[0095] S15. In response to the completion of the switching actions corresponding to the first switching signal and the second switching signal, according to the intelligent operation and maintenance simulation requirements, access the detection equipment and the intelligent operation and maintenance device to perform corresponding operation and maintenance simulation.

[0096] Specifically, the above-mentioned power cable intelligent operation and maintenance sandbox simulation method mainly includes two stages: loop preparation and loop test; wherein, the loop preparation stage is to use wifi to establish a communication connection between the switching cabinet and the control terminal such as a mobile phone, tablet or computer through the cloud server in advance, and then determine whether it is necessary to perform corresponding cable length switching and defective short sample switching according to the needs of the specific intelligent operation and maintenance simulation experiment, and send a first switching signal and a second switching signal through the control terminal to control the switching cabinet to perform corresponding cable length switching and defective short sample switching respectively: when the control terminal sends a first switching signal containing the cable length to be switched to the cable length switching device of the switching cabinet, the first action device is controlled by the first photoelectric isolation module in the cable length switching device. The device drives the cable length switching switch to perform the switching action of the miniaturized cable length; when the control terminal sends the second switching signal containing the defective short sample to be switched to the defective short sample switching device of the switching cabinet, the second action device is controlled by the second photoelectric isolation module in the defective short sample switching device to drive the multi-to-one non-partial discharge switching switch to perform the switching action of the cable fault defective short sample and / cable partial discharge defective short sample at the required position of the intelligent operation and maintenance device; in the loop test phase, after the cable length switching or defective short sample switching required for the experiment is completed according to the intelligent operation and maintenance simulation requirements, the detection equipment is connected to the outdoor cable terminal heads at both ends of the sandbox system, and the relevant simulation experiments are carried out according to the operating procedures of the connected intelligent operation and maintenance device according to the test purpose and requirements. It should be noted that the types and numbers of the connected inspection equipment refer to the description of the system in the previous text, which will not be repeated here.

[0097] It should be noted that although the steps in the above flowchart are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders.

[0098] It should be noted that the specific definition of the power cable intelligent operation and maintenance sandbox simulation method can be found in the above definition of the power cable intelligent operation and maintenance sandbox simulation system, which will not be repeated here. Each module in the above-mentioned power cable intelligent operation and maintenance sandbox simulation system can be implemented in whole or in part through software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0099] Fig.11 FIG. 1 shows an internal structure diagram of a computer device in an embodiment, and the computer device may specifically be a terminal or a server. Fig.11 As shown, the computer device includes a processor, a memory, a network interface, a display and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for sandbox simulation of intelligent operation and maintenance of power cables is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0100] It can be understood by those skilled in the art that Fig.11 The structure shown in the figure is only a block diagram of a part of the structure related to the present application scheme, and does not constitute a limitation on the computer device to which the present application scheme is applied. The specific computing device may include more or fewer components than those shown in the figure, or combine certain components, or have the same component arrangement.

[0101] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the above method are implemented when the processor executes the computer program.

[0102] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0103] In summary, an embodiment of the present invention provides an intelligent operation and maintenance sandbox simulation system for power cables, an operation and maintenance simulation method, a computer device and a storage medium. By providing a sandbox, outdoor cable terminal heads respectively arranged at both ends of the sandbox and connected to detection equipment, at least two switching cabinets arranged between the outdoor cable terminal heads for switching the miniature cable length and defect short samples, and a cable layout area arranged under the sandbox with multiple miniature cables for connecting the outdoor cable terminal heads and the switching cabinets, it has the advantages of small investment, good flexibility, easy operation, no influence of weather and use location, and adaptability to a wide range of scenarios. The intelligent operation and maintenance system and the corresponding simulation method can intelligently switch the key parameters such as the defect type and defect location according to the actual simulation requirements to support the corresponding simulation experiment. It can not only meet the needs of intelligent operation and maintenance simulation of power cables, but also effectively solve the problems of intelligent operation and maintenance equipment training of power cable lines and quality control of intelligent operation and maintenance devices for grassroots operation and maintenance personnel, and further improve the convenience and reliability of actual power cable operation and maintenance simulation.

[0104] Each embodiment in this specification is described in a progressive manner, and the same or similar parts of each embodiment can be directly referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. It should be noted that the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above-mentioned embodiments only express several preferred implementation modes of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in the technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be regarded as the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be based on the protection scope of the claims.

Claims

1. A power cable intelligent operation and maintenance sandbox simulation system, It is characterized in that The system includes a sand table, outdoor cable terminals respectively arranged at two ends of the sand table, at least two switching cabinets arranged between the outdoor cable terminals, and a cable arrangement area arranged under the sand table; The outdoor cable terminal head is used to connect the detection equipment; The switching cabinet is used to switch the length of the miniature cable and the defective short sample; the miniature cable includes a conductor, an inner semi-conductive shielding layer, a main insulation, an outer semi-conductive shielding layer, a copper wire shielding layer and an outer sheath from the inside to the outside; the miniature cable is obtained by reducing the main insulation to a size that can ensure real pressurization and no partial discharge, and the conductor size is correspondingly reduced, and the thickness of the inner semi-conductive shielding layer, the outer semi-conductive shielding layer, the copper wire shielding layer and the outer sheath remain unchanged, and the size of the main insulation and the conductor are adjusted; The cable arrangement area is provided with a plurality of miniature cables, and the miniature cables are used to connect the outdoor cable terminal head and the switching cabinet; Wherein, the switching cabinet comprises a cable length switching device; the cable length switching device is used to switch the miniature cable length between the outdoor cable terminal heads; The cable length switching device includes a cable length switching switch, a first WIFI processor, a first photoelectric isolation module, a first action device and a first state feedback device; The cable length switching switch is used to switch the miniature cables of different lengths to access the system line; the cable length switching switch comprises an insulating connecting rod and a metal connecting rod connected to the first actuating device in sequence, and a plurality of non-dizzy contacts sleeved on the insulating connecting rod and the metal connecting rod; the non-dizzy contacts are used to connect the corresponding miniature cables, and are connected to the metal connecting rod by rotating the first actuating device; The first WIFI processor is used to receive a first switching signal from a control terminal, and according to the first switching signal, control the first action device through the first photoelectric isolation module to drive the cable length switch to perform a switching action, and obtain a first state feedback value of the first state feedback device and send it to the control terminal; The first photoelectric isolation module includes a photoelectric coupler and a micro photoelectric sensor; the photoelectric coupler is used to control the first action device according to the first switching signal; the micro photoelectric sensor is used to collect the first state feedback value fed back by the first state feedback device, and transmit the first state feedback value to the first WIFI processor; The first state feedback device is used to obtain the position state of the cable length switch and generate the first state feedback value according to the position state.

2. The power cable intelligent operation and maintenance sandbox simulation system according to claim 1, It is characterized in that The detection equipment includes cable core detection equipment and shielding layer detection equipment; The cable core detection equipment includes at least one of an oscillating wave partial discharge measurement device, a variable frequency series resonance test device, an ultra-low frequency dielectric loss detection instrument, a power frequency withstand voltage test equipment, and a cable fault flash detector; The shielding layer detection device includes at least one of a partial discharge detection device, a ground loop current detection device, and an online fault detection device.

3. The power cable intelligent operation and maintenance sandbox simulation system according to claim 1, It is characterized in that The switch cabinet also includes a defective short sample switching device and a defective short sample; The defective short sample switching device is used to execute the connection or disconnection of the defective short sample; The defect short samples include cable fault defect short samples and cable partial discharge defect short samples.

4. The power cable intelligent operation and maintenance sandbox simulation system according to claim 3, It is characterized in that The defective short sample switching device includes a many-to-one non-partial discharge switching switch, a second WIFI processor, a second photoelectric isolation module, a second action device, a second state feedback device and an analog circuit; The many-to-one non-partial discharge switching is used to switch the connection between the analog line and the defective short sample; The second WIFI processor is used to receive a second switching signal from the control terminal, communicate with the control terminal, and control the second action device to drive the many-to-one non-partial discharge switching switch to perform a switching action through the second photoelectric isolation module according to the second switching signal, and obtain the second state feedback value of the second state feedback device and send it to the control terminal; The second photoelectric isolation module includes a photoelectric coupler and a micro photoelectric sensor; the photoelectric coupler is used to control the second action device according to the second switching signal; the micro photoelectric sensor is used to collect the second state feedback value fed back by the second state feedback device, and transmit the second state feedback value to the second WIFI processor; The second state feedback device is used to obtain the position state of the many-to-one non-partial discharge switching switch and generate the second state feedback value according to the position state.

5. The power cable intelligent operation and maintenance sandbox simulation system according to claim 4, It is characterized in that The many-to-one non-partial discharge switching switch comprises a transmission conversion gear, an insulating connecting rod and a switching turntable connected to the second actuating device in sequence, and a non-partial discharge contact, a high-voltage end metal connecting rod, a defective short sample joint and a grounding end metal connecting rod connected to the switching turntable; The defective short sample connector is used to connect the simulation circuit arranged in the middle of the switching turntable, and control the transmission conversion gear to drive the insulating connecting rod and the switching turntable to rotate through the second action device, so that any non-partial discharge contact under the switching turntable is connected to the high-voltage end metal connecting rod; The high-voltage end metal connecting rod is used to connect the analog circuit located in the middle of the switching turntable to any non-partial discharge contact located under the switching turntable; The grounding metal connecting rod is used to connect a non-partial discharge contact that is not connected to the analog circuit.

6. A power cable intelligent operation and maintenance sandbox simulation method for the power cable intelligent operation and maintenance sandbox simulation system as claimed in any one of claims 1 to 5, It is characterized in that The method comprises the following steps: Pre-establishing a communication connection with a control terminal; receiving a switching signal of the control terminal; the switching signal includes at least one of a first switching signal and a second switching signal; the second switching signal includes at least one of a fault defect short sample switching signal and a partial discharge defect short sample switching signal; Determine whether the switching signal includes the first switching signal, and if so, obtain the length of the line to be switched, and perform a switching action through a cable length switching device of a switching cabinet according to the length of the line to be switched; Determine whether the switching signal includes the second switching signal; if so, obtain the corresponding defect short sample to be switched according to the type of the second switching signal, and perform a switching action through a defect short sample switching device of the switching cabinet according to the defect short sample to be switched; the defect short sample to be switched includes at least one of a cable fault defect short sample and a cable partial discharge defect short sample; In response to the completion of the switching actions corresponding to the first switching signal and the second switching signal, according to the intelligent operation and maintenance simulation requirements, the detection equipment and the intelligent operation and maintenance device are connected to perform corresponding operation and maintenance simulation.

7. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, It is characterized in that When the processor executes the computer program, the steps of the method according to claim 6 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the computer program is executed by a processor, the steps of the method according to claim 6 are implemented.

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