Pull type electrified load transfer device and use method thereof

Abstract

The invention relates to the technical field of electric power systems, in particular to a pull type electrified load transfer device and a use method thereof.The device comprises a pull chassis, a square cabin, a cable winding and unwinding mechanism, a bypass load switch and a bypass system detection test platform, and the cable winding and unwinding mechanism is arranged in the square cabin; the bypass load switch is connected in series between the first bypass cable and the second bypass cable; the bypass system detection test platform comprises an insulation resistance tester and a conduction test indicator, and the bypass system detection test platform is used for performing an electrical integrity test on a bypass circuit; the bypass load switch, the cable take-up and pay-off mechanism, the bypass system detection test platform and other components are integrated, the construction time of field equipment before bypass operation is shortened, the residual service life of key insulation components is predicted, updating is carried out in combination with use records, and the operation efficiency is improved. And faults at positions such as a bypass cable or a switch connector in the use process are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power systems, and in particular to a towable live load transfer device and a method of using the same. Background Art

[0002] The routine operation and maintenance of power transmission and distribution networks often requires scheduled inspections, upgrades, or emergency repairs of key components such as lines, switchgear, and transformers. To ensure continuous power supply to users during these operations and mitigate the social and economic impacts of widespread or prolonged power outages, bypass technology is often employed. This involves temporarily isolating the portion of the power system requiring maintenance through temporary power lines and switchgear, while the bypass system takes over powering downstream loads.

[0003] Currently, the most common way to implement bypass power supply is to temporarily build a bypass system at the job site. This typically involves transporting dispersed bypass cables, bypass switches, support structures, and other equipment to the site for manual assembly and wiring. While flexible, this approach faces challenges in deployment efficiency, standardized equipment management, and safety risk control during operations.

[0004] To improve the efficiency and convenience of bypass operations, some mobile bypass power supply equipment has also emerged. However, existing mobile bypass equipment has a single function, lacks an integrated design, requires the purchase of dedicated vehicles, and is complex to maintain. Summary of the Invention

[0005] The present invention aims to solve the problems of the existing mobile bypass system lacking electrical integrity testing and assessment of the insulation status of the equipment itself. The purpose is to provide a towable live load transfer device and its use method, which further improves the bypass operation efficiency, enhances system integration and intelligence, improves safety, and can effectively evaluate and manage the status of the bypass equipment itself.

[0006] The present invention is achieved through the following technical solutions: A towable live load transfer device, comprising: trailer chassis; A shelter provided on the trailer chassis; at least one cable retracting and releasing mechanism, the cable retracting and releasing mechanism being disposed inside the shelter and being used to retract and release a first bypass cable and a second bypass cable; a bypass load switch, the bypass load switch being disposed inside the shelter and being connected in series between the first bypass cable and the second bypass cable to form a continuous bypass circuit when the bypass load switch is closed; A bypass system detection test platform comprises an insulation resistance tester and a continuity test indicator. The bypass detection test platform is used to perform an electrical integrity test on the bypass circuit.

[0007] Specifically, the connection ends between the bypass load switch and the three phase conductors in the first bypass cable are set to A, B, and C, and the connection ends between the bypass load switch and the three phase conductors in the second bypass cable are set to R, S, and T; The bypass system detection test platform also includes: six test terminals, which are respectively configured as an A-phase terminal, a B-phase terminal, a C-phase terminal, an R-phase terminal, an S-phase terminal, and a T-phase terminal, and are respectively connected to the distal ends of the phase conductors in the first bypass cable and the second bypass cable; A continuity test phase sequence transfer switch, comprising a first single-pole four-throw switch and a second single-pole four-throw switch, wherein the movable plates of the first single-pole four-throw switch and the second single-pole four-throw switch are respectively electrically connected to the two input terminals of the continuity test indicator; the three static contacts of the first single-pole four-throw switch are respectively electrically connected to the A-phase terminal, the B-phase terminal, and the C-phase terminal, and the three static contacts of the second single-pole four-throw switch are respectively electrically connected to the R-phase terminal, the S-phase terminal, and the T-phase terminal; the fourth static contacts of the first single-pole four-throw switch and the second single-pole four-throw switch are both in the open position; The test transfer switch includes six single-pole single-throw switches, wherein the A-phase terminal, the B-phase terminal, and the C-phase terminal are electrically connected to one test terminal of the insulation resistance tester through three single-pole single-throw switches, and the R-phase terminal, the S-phase terminal, and the T-phase terminal are electrically connected to the other test terminal of the insulation resistance tester through another three single-pole single-throw switches.

[0008] Optionally, the number of the cable retracting and releasing mechanisms is two, and the cable retracting and releasing mechanisms include: An optical axis and a bearing assembly, wherein both ends of the optical axis are rotatably connected to the shelter through the bearing assembly; a cable reel for winding a corresponding bypass cable, wherein the cable reel is coaxially fixed on the optical axis; a driving unit fixed in the cabin, connected to the optical axis, and configured to drive the optical axis to rotate the cable reel; The outer portion of the cable reel is provided with a latch, and the interior of the cabin is provided with a fixing plate adapted to the latch; The latch selectively engages with the fixing plate and locks the cable reel when the latch engages with the fixing plate and unlocks the cable reel when the latch is disengaged; The bypass cable leading-out area of the shelter is provided with an insulating cross arm for supporting, guiding or fixing the bypass cable during the leading-out or retraction process.

[0009] Optionally, the bypass load switch is installed inside the shelter through a sliding mechanism for sliding out of the shelter; The sliding mechanism comprises a heavy-duty sliding rail support fixedly connected to the internal structure of the shelter, a heavy-duty sliding rail in sliding connection with the heavy-duty sliding rail support, and a support plate fixedly connected with the heavy-duty sliding rail, and the bypass load switch is installed on the support plate.

[0010] Optionally, the bypass load switch comprises: a switch body; an electrically-controlled operating mechanism for driving the action of the main contact; at least one voltage sensor and at least one current sensor configured to monitor the voltage and current values passing through the bypass circuit; at least one temperature sensor configured to monitor the temperature of the bypass load switch body or its connecting components; and a data processing and forwarding module electrically connected with the voltage sensor, the current sensor and the temperature sensor for collecting and processing the monitoring data and forwarding the monitoring data to external devices through a communication interface.

[0011] A use method of a towed live load transfer device, based on a towed live load transfer device as described above, the use method comprising: transporting the towed live load transfer device to the predetermined work site and completing the deployment; performing electrical integrity test on the bypass circuit composed of the bypass cable and the bypass load switch by using the bypass system test platform, the electrical integrity test at least including conduction test and insulation test; after the completion of the electrical integrity test, connecting the distal end of the bypass cable to the upstream power connection point and the downstream load connection point of the target line section to be subjected to load transfer, respectively; closing the bypass load switch to close the bypass circuit, so that the bypass circuit is powered and carries the load, and the electric charge is transported from the upstream power connection point to the downstream load connection point; disconnecting the normal power supply path of the target line section, and performing work on the target line section; monitoring the operating parameters of the bypass circuit in real time during the power supply through the bypass circuit; After the operation of the target line section is completed, the normal power supply path of the target line section is restored, and the bypass load switch is operated to disconnect the bypass circuit; Disconnect the remote end of the bypass cable and store the trailer-type live load transfer device; Update the usage record of the trailer-type live load transfer device and predict the remaining service life through an adaptive insulation degradation prediction model.

[0012] Specifically, the method for conducting the continuity test includes: Selecting a phase path to be tested, the phase path starting from a phase conductor in the first bypass cable, passing through a corresponding closed phase contact in the bypass load switch, and terminating at a corresponding phase conductor in the second bypass cable; Ensure that the phase contact corresponding to the phase path to be tested in the bypass load switch is in a closed state; Operating the first single-pole four-throw switch to connect one input terminal of the continuity test indicator to a test connection post corresponding to a starting point of a phase path to be tested; operating the second single-pole four-throw switch to connect the other input terminal of the test indicator to the test connection post corresponding to the end point of the phase path to be tested; Activate the continuity test indicator to detect and confirm the electrical continuity status of the selected phase path to be tested.

[0013] Specifically, the methods for performing insulation testing include: Determine the first test point and the second test point of the insulation path to be tested according to the preset insulation test items, wherein the preset insulation test items are: phase-to-phase insulation test, phase-to-ground insulation test or bypass load switch break insulation test; If a bypass load switch break insulation test is performed, ensuring that the corresponding phase contacts of the bypass load switch forming part of the insulation path to be tested are in an open state; Operate the test transfer switch to connect the first test point to one test terminal of the insulation resistance tester; If the second test point is a phase terminal, operate the test transfer switch to connect the second test point to the other test terminal of the insulation resistance tester; or, if the second test point is a ground reference point, directly connect the other test terminal of the insulation resistance tester to the ground reference point; Ensure that other phase terminals not involved in the current specific insulation test path are kept disconnected from both test terminals of the insulation resistance tester through their corresponding single-pole single-throw switches; Starting the insulation resistance tester, applying a preset test voltage between the first test point and the second test point, and measuring the insulation resistance value therebetween; in, When performing a phase-to-phase insulation test or a bypass load switch disconnect insulation test, the first test point is selected from one of the A-phase terminal, B-phase terminal, C-phase terminal, R-phase terminal, S-phase terminal, or T-phase terminal, and the second test point is selected from another one of the A-phase terminal, B-phase terminal, C-phase terminal, R-phase terminal, S-phase terminal, or T-phase terminal that is different from the first test point; When performing a relative-to-ground insulation test, the first test point is selected from one of the A-phase terminal, B-phase terminal, C-phase terminal, R-phase terminal, S-phase terminal or T-phase terminal, and the second test point is the ground reference point of the towed live load transfer device.

[0014] Optionally, the method for predicting the remaining service life by using the adaptive insulation degradation prediction model includes: Repeatedly obtain test data of insulation performance parameters of one or more target insulation components after multiple operations or time intervals, and record operational stress data and environmental condition data associated with each test; wherein the insulation performance parameters include at least insulation resistance values ​​compensated for environmental factors; and the operational stress data includes at least one or more of the number of deployments, cumulative load time, or experienced current load magnitude; Establishing an adaptive insulation degradation prediction model for the target insulation component based on the acquired insulation performance parameter test data, operating stress data, and environmental condition data; Using an adaptive insulation degradation prediction model, combined with preset future operating stress expectations, predict the future degradation trajectory of one or more key insulation performance parameters of the target insulation component; The remaining useful life of the target insulation component is estimated according to the predicted future degradation trajectory and a predefined insulation performance failure threshold.

[0015] Optionally, the method for establishing an adaptive insulation degradation prediction model includes: Define state variables that characterize the insulation performance of the target insulation component , establish a variable for describing the state Basic model of insulation degradation over time, ,in, For the The time point of the test, is the initial or baseline health value of the insulation component, is the cumulative degradation function, which is used to describe the cumulative degradation function up to the time point By parameter vector and operating stress The amount of decline in health status caused by the combined effects; To include parameter vector of model parameters; Number of deployments , cumulative load time , current load experienced and a vector collection of environmental conditions; is the uncertainty term of the model error; Initialize parameter vector The prior probability distribution of ; In getting the The insulation performance state variable of the newest target insulation component The actual observed value And the corresponding operating stress After that, the following parameter update steps are performed to achieve the adaptability of the model: Based on the insulation degradation model and the newly acquired data, the likelihood function is defined , which quantifies the likelihood function given the model parameters , stress data , initial state and degradation function Under the condition of probability; Apply Bayes' theorem, combined with the prior probability distribution and likelihood function , calculate and update the parameter vector The posterior probability distribution of , ,in, is proportional to; Use the updated posterior probability distribution The statistic of The current optimal estimate of is updated to obtain the adaptive insulation degradation prediction model.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: By integrating key components such as the bypass load switch, cable retraction mechanism, and bypass system detection and testing platform into a towed cabin, the present invention reduces the time and complexity of setting up on-site equipment before bypass operations, improves the deployment efficiency of bypass operations and the rapid response capability of the overall operation.

[0017] In addition, a bypass system detection and test platform is integrated in the cabin. By coordinating the conduction test phase sequence conversion switch and the test conversion switch with the test instrument, the conduction performance and insulation performance of the bypass cable and bypass load switch are electrically tested before the bypass circuit is officially put into operation, thereby improving the safety of live load transfer operations and avoiding power supply accidents that may be caused by electrical failures of the bypass equipment itself.

[0018] The present invention also predicts the remaining service life of key insulation components by introducing a multi-stress predictive insulation degradation model, and updates it in combination with usage records, thereby achieving a shift from passive maintenance to predictive maintenance and avoiding failures in locations such as bypass cables or switch connectors during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, are used to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention, and the accompanying drawings are included in and constitute a part of this specification and do not constitute a limitation of the embodiments of the present invention.

[0020] Figure 1 It is a structural schematic diagram of a towable live load transfer device according to the present invention.

[0021] Figure 2 Schematic diagram of the wiring of the bypass system detection test platform according to the present invention.

[0022] Figure 3 2 is a schematic structural diagram of the shelter according to the present invention.

[0023] Figure 4 It is a structural schematic diagram of the cable retracting and releasing mechanism according to the present invention.

[0024] Figure 5 2 is a schematic structural diagram of the sliding mechanism according to the present invention.

[0025] Figure 6 1 is a wiring diagram of the bypass load switch according to the present invention.

[0026] Figure 7 It is a flow chart of a method for using a towable live load transfer device according to the present invention.

[0027] Figure 8 It is a schematic diagram of the flow of conducting a continuity test according to the present invention.

[0028] Figure 9 It is a schematic diagram of the process of performing insulation testing according to the present invention.

[0029] Figure 10 2 is a flow chart of predicting the remaining useful life according to the present invention.

[0030] Figure 11 It is a flowchart diagram of the method for establishing an adaptive insulation degradation prediction model according to the present invention.

[0031] Figure markings: 1-shelter, 2-cable retracting and releasing mechanism, 3-bypass load switch, 4-trailer chassis, 5-insulating crossbar, 1-1-control panel, 1-2-operation panel, 1-3-front door, 1-4-warning light, 1-5-lifting ring, 1-6-rear door, 1-7-side flip-up door, 1-8-side rolling door, 2-1-motor, 2-2-flat key, 2-3-bearing seat, 2-4-bearing seat screw, 2-5-bearing fixing part, 2-6-latch fixing seat, 2-7-circlip, 2-8-bearing, 2-9-bearing fixing ring, 2-10-cable reel, 2-11-latch, 2-12-fixing plate, 2-13-thrust block, 2-14-jackscrew, 2-15-optical axis, 3-1-heavy-duty slide rail bracket, 3-2-heavy-duty slide rail. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the relevant content and are not intended to limit the present invention.

[0033] It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings.

[0034] In the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] Example 1 like Figure 1 As shown, a mobile, integrated bypass power supply solution is provided with a built-in test capability for the electrical integrity of the bypass circuit itself. The key components (cables, switches) and test instruments required for bypass power supply are integrated into a vehicle-towable cabin 1, which can be quickly deployed to the work site and perform safety checks on the temporary power supply line to be established before the formal bypass power supply.

[0036] A towable live load transfer device comprises: a towable chassis 4, a square cabin 1, a cable retracting and releasing mechanism 2, a bypass load switch 3 and a bypass system detection and testing platform.

[0037] The trailer chassis 4 can be towed by a vehicle to different work sites, and the cabin 1 is installed on the trailer chassis 4 to form a closed or semi-closed working space for accommodating and protecting various equipment components inside.

[0038] At least one cable retraction mechanism 2 is arranged inside the cabin 1 and is used to retract the first bypass cable and the second bypass cable; the bypass load switch 3 is arranged inside the cabin 1, and the bypass load switch 3 is arranged in series between the first bypass cable and the second bypass cable. When the bypass load switch 3 is closed, the first bypass cable and the second bypass cable can form a continuous bypass circuit.

[0039] The shunt detection test platform is used to perform electrical integrity tests on shunt circuits. It includes an insulation resistance tester and a continuity test indicator.

[0040] An insulation resistance tester is used to measure the resistance of the insulation material of electrical equipment or circuits. Insulation resistance is an important indicator of insulation performance. A higher insulation resistance value indicates better insulation performance and a lower risk of leakage or breakdown.

[0041] The continuity test indicator is used to check whether the circuit has a low resistance path (i.e. whether it is conductive) and to indicate whether the circuit has problems such as open circuit or poor contact.

[0042] like Figure 2 As shown, a connection structure between a bypass system detection test platform and a three-phase bypass circuit (composed of a first bypass cable, a bypass load switch 3 and a second bypass cable) is provided to implement a continuity test and an insulation test on each phase path.

[0043] The connection terminals between the bypass load switch 3 and the three phase conductors in the first bypass cable are designated A, B, and C, while the connection terminals between the bypass load switch 3 and the three phase conductors in the second bypass cable are designated R, S, and T. A phase conductor is a wire used to carry current of a specific phase in a multiphase AC system. Typically, phases A, B, and C correspond to phases R, S, and T, respectively. This means that current flows from phase A into the switch and out of phase R; current flows from phase B and out of phase S; and current flows from phase C and out of phase T, forming a three-phase bypass channel.

[0044] The bypass system detection test platform also includes a test connection pile, a conduction test phase sequence transfer switch and a test transfer switch.

[0045] The six test terminals, also known as test connections, are interfaces for electrical connection between the test instrument and key points within the bypass circuit. Based on the connection to the bypass load switch 3, they are designated as the A-phase terminal, B-phase terminal, C-phase terminal, R-phase terminal, S-phase terminal, and T-phase terminal, and are connected to the distal ends of the phase conductors in the first and second bypass cables, respectively. Specifically: The A-phase terminal is connected to the other end of the A-phase conductor of the first bypass cable (ie, the end not connected to the A-terminal of the switch).

[0046] The B-phase terminal is connected to the other end of the B-phase conductor of the first bypass cable.

[0047] The C-phase terminal is connected to the other end of the C-phase conductor of the first bypass cable.

[0048] The R-phase terminal is connected to the other end of the R-phase conductor of the second bypass cable (ie, the end not connected to the R end of the switch).

[0049] The S-phase terminal is connected to the other end of the S-phase conductor of the second bypass cable.

[0050] The T-phase terminal is connected to the other end of the T-phase conductor of the second bypass cable.

[0051] The continuity test phase sequence transfer switch includes a first single-pole four-throw switch and a second single-pole four-throw switch. The movable pieces of the first single-pole four-throw switch and the second single-pole four-throw switch are electrically connected to the two input terminals of the continuity test indicator, respectively. The three static contacts of the first single-pole four-throw switch are electrically connected to the A-phase terminal, the B-phase terminal, and the C-phase terminal, respectively. The three static contacts of the second single-pole four-throw switch are electrically connected to the R-phase terminal, the S-phase terminal, and the T-phase terminal, respectively. The fourth static contacts of the first single-pole four-throw switch and the second single-pole four-throw switch are both in the disconnected position. By operating these two single-pole four-throw switches, any phase terminal among A, B, and C can be selected as one endpoint of the continuity test, and any phase terminal among R, S, and T can be selected as the other endpoint of the continuity test, so as to flexibly perform continuity tests on different paths such as AR, AS, AT, BR, BS, BT, CR, CS, and CT (especially the complete conduction path of the corresponding phases such as AR, BS, and CT, which includes the phase conductor of the first bypass cable, the corresponding phase contact of the closed bypass load switch 3, and the phase conductor of the second bypass cable).

[0052] The test transfer switch includes six single-pole single-throw switches. The A-phase terminal, B-phase terminal, and C-phase terminal are electrically connected to one test terminal of the insulation resistance tester through three single-pole single-throw switches, and the R-phase terminal, S-phase terminal, and T-phase terminal are electrically connected to the other test terminal of the insulation resistance tester through another three single-pole single-throw switches. This allows for flexible performance of various insulation tests: Phase-to-phase insulation test: Close the SPST switch corresponding to phase A (connected to one end of the tester), close the SPST switch corresponding to phase B (connected to the other end of the tester), and open all other SPST switches to test the insulation resistance between phase A and phase B conductors.

[0053] Relative insulation test: Close the single-pole single-throw switch corresponding to phase A (connected to one end of the tester), and connect the other end of the tester to the ground reference point of the device (usually the shell of cabin 1 or a dedicated grounding stake) to test the insulation resistance of phase A conductor to ground.

[0054] Switch break insulation test (when the corresponding phase of bypass load switch 3 is disconnected): For example, close the single-pole single-throw switch corresponding to A (connected to one end of the tester) and close the single-pole single-throw switch corresponding to R (connected to the other end of the tester) to test the insulation resistance between the phase breaks of bypass load switch 3A-R.

[0055] When performing a continuity test, the operator uses two single-pole, four-throw (SP4T) switches to connect the two ends of the path to be tested (e.g., the terminals for phases A and R) to the continuity test indicator. When performing an insulation test, six SPST switches are used to connect the corresponding test terminals (or one terminal with the other end grounded) to the insulation resistance tester, depending on the test item (e.g., insulation between phase A and phase B, or insulation between phase A and ground). This simplifies wiring during on-site testing.

[0056] Example 2 like Figure 3 As shown in the figure, the structure of the cabin 1 is described. The cabin 1 is designed with a variety of different types of doors to facilitate access to the internal equipment from different directions. Shelter 1 includes: Assemble steel frames; At least one front-opening door 1-3, which is arranged on the front side of the assembly steel frame; At least one rear door 1-6, which is arranged at the rear side of the assembly steel frame; Two side doors are arranged on both sides of the assembly steel frame, and the side doors include a lower side rolling door 1-8 and an upper side flip-up door 1-7; the side rolling door 1-8 is located in the lower half of the side door and is opened in a rolling shutter manner; the side flip-up door 1-7 is located in the upper half of the side door and is opened in an upward flipping manner.

[0057] The cable retracting mechanism 2 is arranged on the upper layer inside the cabin 1, and the bypass load switch 3 is installed on the lower layer inside the cabin 1 through a sliding mechanism. The sliding mechanism is used to slide the bypass load switch 3 out of the cabin 1 after opening the front door 1-3. When the bypass load switch 3 needs to be operated or maintained, the front door 1-3 of the cabin 1 can be opened first, and then the bypass load switch 3 can be smoothly pulled out from the inside of the cabin 1 to the outside of the cabin 1 through the sliding mechanism, which facilitates wiring, inspection, setting or maintenance.

[0058] In addition, a control panel 1-1 and an operation panel 1-2 are provided on the assembly frame to facilitate control and status monitoring of the entire transfer device. A warning light 1-4 for warning and a lifting ring 1-5 for lifting are provided above the assembly steel frame.

[0059] like Figure 4 As shown, the specific structure of the cable retracting mechanism 2 is provided. There are two cable retracting and releasing mechanisms 2, which are used to retract a first bypass cable and a second bypass cable respectively.

[0060] The cable retracting and releasing mechanism 2 comprises: Optical axis 2-15 and bearing assembly, both ends of the optical axis 2-15 are rotatably connected to the cabin 1 through the bearing assembly; the bearing assembly (usually including a bearing and a bearing seat) is installed on the structure of the cabin 1 to support the optical axis 2-15 and enable it to rotate freely with low friction.

[0061] The cable reel 2-10 is used to wind the corresponding bypass cable, and the cable reel 2-10 is coaxially fixed on the optical axis 2-15; the cable reel 2-10 is a disc-shaped structure directly used to wind and store the bypass cable, and the rotation of the optical axis 2-15 will directly drive the cable reel 2-10 to rotate.

[0062] A drive unit (a motor is used in this embodiment), which is fixed in the cabin 1 and connected to the optical axis 2-15, and is used to drive the optical axis 2-15 to drive the cable reel 2-10 to rotate; In order to prevent the cable from accidentally loosening or rotating during transportation or in a non-working state, a locking mechanism is provided. A latch 2-11 is provided on the outer portion of the cable reel 2-10, and a fixing plate 2-12 adapted to the latch 2-11 is provided inside the shelter 1; The latch 2-11 selectively engages with the fixing plate 2-12, and locks the cable reel 2-10 when the latch 2-11 is engaged with the fixing plate 2-12, and unlocks the cable reel 2-10 when the latch 2-11 is separated from the fixing plate 2-12; The bypass cable lead-out area of ​​the cabin 1 is provided with an insulating cross arm 5. The insulating cross arm 5 is a support arm or component with good insulation performance. It is used to support, guide or fix the corresponding bypass cable during the lead-out or retraction process to prevent the cable from rubbing, tangling or being subjected to unnecessary stress with other components of the cabin 1. It also plays a certain fixing role to ensure the stability of the cable at the lead-out point.

[0063] Installation steps: Installation step 1: Weld the cable reel 2-10 and the bearing fixing part 2-5 to the cable reel 2-10. Installation step 2: Use screws to secure the bearing fixing member 2-5, latch fixing seat 2-6, retaining spring 2-7, bearing 2-8, bearing fixing ring 2-9, latch 2-11, and fixing plate 2-12 to the cable reel 2-10. Installation step 3: Connect the motor 2-1 to the bearing seat 2-3, the cable reel 2-10 to the optical axis 2-15; Installation step 4: Install the flat key 2-2, top screw 2-14, and thrust block 2-13 on the corresponding positions of the optical axis 2-15, tighten them and position them.

[0064] like Figure 5As shown, the bypass load switch 3 is installed inside the shelter 1 through a sliding mechanism, and the sliding mechanism is used to slide the bypass load switch 3 out of the shelter 1; The sliding mechanism includes: a heavy-duty slide rail bracket 3-1, a heavy-duty slide rail 3-2 and a support plate. The heavy-duty slide rail bracket 3-1 is fixedly connected to the internal structure of the cabin 1, the heavy-duty slide rail 3-2 is slidingly connected to the heavy-duty slide rail bracket 3-1, the support plate is fixedly connected to the heavy-duty slide rail 3-2, and the bypass load switch 3 is installed on the support plate.

[0065] The heavy-duty slide bracket 3-1 serves as a stationary base fixed inside the shelter 1. One end of the heavy-duty slide rail 3-2 is connected to or integrated with the heavy-duty slide bracket 3-1, while the other end can slide linearly relative to the bracket. The bypass load switch 3 is mounted on a support plate fixed to the movable portion of the heavy-duty slide rail 3-2. To operate or maintain the switch, the operator pulls the support plate, which then slides the bypass load switch 3 smoothly out of the shelter 1 along the guide path of the heavy-duty slide rail 3-2. Once the operation is completed, it is pushed back into the shelter 1.

[0066] like Figure 6 As shown, the bypass load switch 3 includes: The switch body is the part that realizes its basic on-off function, and contains conductive main contacts and arc extinguishing devices.

[0067] The electric operating mechanism is used to drive the movement of the main contacts to realize the closing (closing) and opening (opening) actions of the main contacts. The use of electric control methods (such as electromagnetic mechanisms or electric mechanisms) can realize remote operation and rapid response of the switch.

[0068] At least one voltage sensor and at least one current sensor are configured to monitor a voltage value and a current value passing through the bypass circuit.

[0069] A high-precision resistor divider connected in series converts the high-voltage side voltage into a low-voltage signal, which is then transmitted to the monitoring terminal via an isolation amplifier. The high-precision resistor divider uses the series precision resistors to proportionally reduce the high voltage, generating a low-voltage sampling signal proportional to the actual high voltage. The isolation amplifier electrically isolates this low-voltage signal from the subsequent measurement circuit or data acquisition module to ensure safety and reduce interference. The signal is then transmitted to the data processing and forwarding module.

[0070] The Hall element detects the magnetic field strength around the conductor and outputs a voltage signal proportional to the current. The Hall effect (when current passes through a conductor placed in a magnetic field, a potential difference is generated in the conductor in a direction perpendicular to the current and the magnetic field) is used to measure the magnetic field strength. Since current flowing through a conductor generates a magnetic field, and the magnetic field strength is proportional to the current, the current can be indirectly measured through the Hall element and converted into a voltage signal output.

[0071] At least one temperature sensor is configured to monitor the temperature of the bypass load switch 3 or its connected components. When the switch carries high current, its contacts, connecting terminals, and other parts may heat up due to contact resistance or overload. The temperature sensor is used to monitor the temperature of these critical parts to prevent damage to the switch or accidents caused by overheating.

[0072] The data processing and forwarding module is electrically connected to the voltage sensor, the current sensor and the temperature sensor, and is used to collect and process monitoring data, and forward the monitoring data to an external device through a communication interface.

[0073] Data processing: This includes signal amplification, filtering, analog-to-digital conversion (A / D conversion), RMS calculation, and comparison with preset thresholds. The system consists of sensor → signal conditioning circuit → data acquisition module (DAQ) → host computer display and alarm. It can display voltage and current RMS values ​​in real time, as well as alarms for over-the-line conditions.

[0074] The switch body, driven by an electronically controlled operating mechanism, switches the circuit on and off. While the bypass circuit is operating, built-in voltage sensors (using a resistor divider principle), current sensors (using a Hall effect element principle), and temperature sensors continuously monitor key parameters. After signal conditioning and data acquisition, these sensor signals are processed by the data processing and forwarding module (such as calculating effective values ​​and determining whether they exceed limits). Ultimately, real-time data and alarm information are transmitted via a communication interface.

[0075] Example 3 like Figure 7 As shown, a method for using a towable live load transfer device is provided to achieve "uninterrupted" switching and guarantee of power supply to users when a certain section of power line or equipment needs to be operated. The method of use includes: Transport the trailer-type live load transfer device to the designated work site and complete its deployment, such as stabilizing the trailer chassis to ensure the stability of the device during subsequent operations, and preparing all equipment in Shelter 1 for use.

[0076] The bypass system test platform performs an electrical integrity test on the bypass circuit, consisting of the bypass cable and bypass load switch 3. This test includes at least a continuity test and an insulation test. The continuity test verifies the connection between the phase conductors of the bypass circuit, checks for open circuits or poor contact, and ensures smooth current flow. The insulation test verifies the insulation performance between the phases of the bypass circuit, between each phase and the ground, and between the switch terminals to prevent short circuits or leakage.

[0077] After the electrical integrity test is completed, the far ends of the bypass cables are connected to the upstream power connection point and the downstream load connection point of the target line section to be loaded.

[0078] Operate the bypass load switch 3 to close the bypass circuit, energize the bypass circuit and take on the load, and transfer the charge from the upstream power connection point to the downstream load connection point; the current (charge) begins to flow from the upstream power connection point to the downstream load connection point through the bypass cable and the closed bypass load switch 3, and the bypass circuit begins to take on or is ready to take on the entire load.

[0079] Disconnect the normal power supply path to the target line section and perform work on the target line section. After confirming that the bypass circuit has been successfully energized and is stably carrying the load, the original normal power supply path can be safely disconnected (for example, by operating the disconnector or circuit breaker at both ends of the target line section). At this point, the target line section is completely de-energized, allowing workers to enter the section for scheduled inspection, maintenance, or emergency repairs.

[0080] During the period of power supply through the bypass circuit, the operating parameters of the bypass circuit are monitored in real time; the integrated monitoring function of the bypass load switch 3 (such as the second embodiment) is used to monitor the key operating parameters of the bypass circuit such as voltage, current, temperature, etc. in real time to ensure the safety and stability of the bypass power supply.

[0081] After the work on the target line section is completed, the normal power supply path for that section is restored, and bypass load switch 3 is operated to disconnect the bypass circuit. First, the normal power supply path must be restored (for example, by closing the previously open disconnector or circuit breaker). After confirming that the normal power supply path has been restored and is stably carrying the load, bypass load switch 3 in shelter 1 is operated to open it, shutting down the bypass circuit. This "close the main line first, then disconnect the bypass line" sequence ensures seamless power supply transition.

[0082] Disconnect the remote connection of the bypass cable and store the towable live load transfer device; that is, use the cable retracting mechanism 2 to retract the bypass cable into the cabin 1, and organize the other components of the device and prepare to evacuate the site.

[0083] Update the usage history of trailer-mounted live load transfer devices and predict their remaining useful life using an adaptive insulation degradation prediction model. After each operation, the device's usage (e.g., number of deployments, operating hours, load conditions, environmental conditions, etc.) is recorded. Using a multi-stress predictive insulation degradation model, combined with this usage history and historical data, the current condition of key insulation components (such as bypass cables and switch insulation) is assessed and their remaining useful life (RUL) is predicted, facilitating predictive maintenance and health management of the equipment.

[0084] Example 4 like Figure 8 As shown in the figure, the specific steps for conducting the continuity test are provided, including: Select a phase path to be tested. This phase path starts from a phase conductor in the first bypass cable, passes through the corresponding closed phase contact in bypass load switch 3, and ends at the corresponding phase conductor in the second bypass cable. Specify the complete conductivity path of the phase to be tested. For example, if the conductivity of phase A is to be tested, the path includes: starting from the phase A conductor of the first bypass cable, passing through the main contact of phase A (which should be closed) in bypass load switch 3, and finally to the phase conductor of phase R in the second bypass cable.

[0085] Because the purpose of the test is to check whether the entire path including the switch closed contacts is connected, ensure that the phase contacts of the bypass load switch 3 corresponding to the phase path to be tested are in the closed state; operating the first single-pole four-throw switch to connect one input terminal of the continuity test indicator to a test terminal corresponding to a starting point of a phase path to be tested (e.g., one of the phase A test terminal, the phase B test terminal, or the phase C test terminal); The second single-pole four-throw switch is operated to connect the other input terminal of the test indicator to the test terminal corresponding to the end point of the phase path to be tested (for example, one of the R phase test terminal, the S phase test terminal or the T phase test terminal).

[0086] Activate the continuity test indicator to detect and confirm the electrical continuity of the selected phase path. The instrument applies a small voltage or current to the path under test and, based on the response, determines whether the selected phase path has electrical continuity. If continuity is detected, the phase path is well connected; if not, there may be a break or poor contact in the path.

[0087] By precisely switching two single-pole four-throw switches, the two ends of the measured path are selectively connected to the two input terminals of the conduction test indicator. The conduction test indicator determines whether there is a low-impedance electrical path between the two selected points through a simple electrical test (such as a small current on-off detection). The A-R, B-S, C-T phase paths of the device can be applied in turn to complete the inspection of the main conduction path of the bypass circuit.

[0088] Embodiment five As shown in Figure 9 , specific method steps for performing insulation tests are provided. According to different test items (inter-phase insulation, phase-to-ground insulation, switch gap insulation), by operating specific transfer switches (six single-pole single-throw switches), the two key test points of the measured insulation path are connected to the insulation resistance tester to evaluate the insulation performance of these paths.

[0089] The method for performing insulation tests comprises: According to the preset insulation test item, the first test point and the second test point of the insulation path to be tested are determined. The preset insulation test items are: inter-phase insulation test, phase-to-ground insulation test or bypass load switch gap insulation test. Different types of tests require different test points.

[0090] If the bypass load switch gap insulation test is performed, it is ensured that the corresponding phase contact point in the bypass load switch 3 that forms part of the insulation path to be tested is in the open state, otherwise the resistance of the closed loop (which should be a minimum value) rather than the insulation resistance will be tested.

[0091] The test transfer switch is operated to connect the first test point to one test terminal of the insulation resistance tester; If the second test point is a phase terminal, the test transfer switch is operated to connect the second test point to the other test terminal of the insulation resistance tester; or, if the second test point is a ground reference point, the other test terminal of the insulation resistance tester is directly connected to the ground reference point; It is ensured that the phase terminals not involved in the current specific insulation test path are kept disconnected from both test terminals of the insulation resistance tester through their respective single-pole single-throw switches; in order to ensure the accuracy of the test results, only the two points to be measured should be connected to the tester. All other phase terminal corresponding single-pole single-throw switches must be in the open position to prevent them from being connected to the test circuit, interfering with the test results or causing false insulation paths.

[0092] Start the insulation resistance tester, apply a preset test voltage between the first and second test points, and measure the insulation resistance value between the two. The insulation resistance tester will apply a high DC voltage (such as 500V, 1000V, 2500V, etc.) between the two selected test points, measure the tiny leakage current flowing through the insulating material, and then calculate the insulation resistance value based on Ohm's law. The measured insulation resistance value will be compared with the standard or empirical threshold to determine whether the insulation performance of the tested path is qualified.

[0093] The phase-to-phase insulation test measures the insulation resistance between conductors of different phases. The phase-to-ground insulation test measures the insulation resistance between each phase conductor and the equipment ground (ground reference point). The bypass load switch disconnect insulation test measures the insulation resistance between the incoming and outgoing terminals of the same phase when the switch is in the off state.

[0094] When performing a phase-to-phase insulation test or a bypass load switch disconnect insulation test, the first test point is selected from one of the A-phase terminal, B-phase terminal, C-phase terminal, R-phase terminal, S-phase terminal, or T-phase terminal, and the second test point is selected from another A-phase terminal, B-phase terminal, C-phase terminal, R-phase terminal, S-phase terminal, or T-phase terminal that is different from the first test point; (for example, when testing the insulation between phases A and B, the first test point is the A-phase terminal, and the second test point is the B-phase terminal; when testing the insulation of the A-phase switch disconnect, the first test point is the A-phase terminal, and the second test point is the R-phase terminal).

[0095] When performing a relative-to-ground insulation test, the first test point is selected from one of the A-phase terminal, the B-phase terminal, the C-phase terminal, the R-phase terminal, the S-phase terminal, or the T-phase terminal, and the second test point is the ground reference point of the towed live load transfer device (such as the metal shell of the shelter 1 or a dedicated grounding terminal).

[0096] Example 6 like Figure 10 As shown, a prediction model is provided to continuously optimize the prediction of future insulation status and life by continuously collecting measured data on insulation performance and various operating and environmental factors that affect its aging.

[0097] Methods for predicting remaining service life using adaptive insulation degradation prediction models include: For one or more target insulation components (e.g., the insulation layer of a bypass cable or the insulation inside the bypass load switch 3), repeatedly obtain test data on their insulation performance parameters after multiple operations or time intervals, and record the operating stress data and environmental condition data associated with each test; wherein the insulation performance parameters include at least the insulation resistance value after compensation for environmental factors (e.g., correction based on temperature and humidity to eliminate interference from environmental changes on the readings and obtain more comparable data); the operating stress data includes at least one or more of the number of deployments, cumulative load time, or current load magnitude experienced; Based on the acquired insulation performance parameter test data, operating stress data, and environmental condition data (recording environmental factors such as average temperature and humidity during equipment operation or storage), an adaptive insulation degradation prediction model for target insulation components is established; An adaptive insulation degradation prediction model, combined with pre-defined future operational stress projections, predicts the future degradation trajectory of one or more key insulation performance parameters of a target insulation component. This future operational stress projection estimates the equipment's future usage intensity (e.g., expected annual deployment times, load conditions, etc.). By inputting the projected future stresses into the model, the model can infer the likely downward trend and change path of key insulation performance parameters (such as corrected insulation resistance) over a period of time.

[0098] Based on the predicted future degradation trajectory and predefined insulation performance failure thresholds, when parameters degrade below the failure threshold, the insulation component is considered to have reached the end of its service life or presents an unacceptable risk, requiring replacement or major repairs. This allows for an estimation of the remaining useful life of the target insulation component.

[0099] To predict the future, it is necessary to estimate the operating stress and environmental conditions that the component may experience in the future, including: the expected number of future deployments, the expected future cumulative load time, the expected future current load conditions and the expected future average environmental conditions, and form a future stress vector sequence ; Then, the degradation trajectory of the insulation performance state variables in the future is predicted using the insulation degradation basic model with the optimal estimated parameter values. , .

[0100] Through this formula, we can calculate a series of expected insulation status values ​​at different time points in the future , thus forming a future degradation trajectory.

[0101] One or more state variables need to be defined in advance The failure threshold is Degradation to the failure threshold is considered as failure of the insulation component or reaching a level that requires immediate replacement / maintenance The predicted future degradation trajectory is compared to a predefined failure threshold, the remaining useful lifetime is defined as the time from the current time point to the first time the failure threshold is reached or fallen below.

[0102] As shown in Figure 11 , a specific method for establishing an adaptive insulation degradation prediction model is provided, comprising: First, one or more state variables are selected that are capable of quantitatively reflecting the insulation performance of the target insulation component (such as bypass cable, switch insulation), and define the state variable , which can be defined as the logarithm of the insulation resistance value after compensation by environmental factors: , wherein is the insulation resistance value measured at time point and compensated by temperature (for example, corrected by formula) and humidity.

[0103] Then, a basic insulation degradation model is established to describe how the state variable evolves over time (or number of uses, operating period, etc.), , wherein is the time point of the th test, is the initial or baseline health state value of the insulation component, which is set as the average value in the new state or early stable operation stage of the insulation component, and can be obtained by statistical averaging of a batch of similar new components, or calibrated when the component is first put into use. obeys a normal distribution with mean 0 and variance , that is .

[0104] is the cumulative degradation function, which is used to describe the amount of health state decline caused by the parameter vector and the operating stress together up to time point ; is the parameter vector containing model parameters; is a vector set of deployment times , cumulative load time , current load experienced and environmental conditions; is the uncertainty term of the model error; ​The cumulative degradation function can be selected .

[0105] is a parameter vector, and the meaning of each parameter is as follows: : Base time degradation rate coefficient.

[0106] : Each deployment operation ( As of The total number of deployments) has an impact on the degradation coefficient.

[0107] :Accumulated load time( As of The influence coefficient of the total number of hours of operation with electrical load on the degradation.

[0108] : The influence coefficient of current load stress on degradation, Can be up to Some average measure (for example, RMS or arithmetic mean) of the peak current experienced.

[0109] : The influence coefficient of temperature stress on degradation, About the average ambient temperature For example, the function can be expressed in the form of the Arrhenius model, or simplified to ,in is the reference temperature without obvious thermal stress, is the sensitivity coefficient.

[0110] : The influence coefficient of humidity stress on degradation, About the average ambient humidity Functions such as .

[0111] The vector set contains the specific stress factors mentioned above 、 、 、 、 as well as itself.

[0112] Initialize parameter vector The prior probability distribution of , which reflects our initial beliefs or prior knowledge about the possible values ​​of these parameters. This knowledge can come from historical data of similar components, inferences from physical and chemical principles, information from manufacturers, or expert judgment.

[0113] In getting the The insulation performance state variable of the newest target insulation component The actual observed value And the corresponding operating stress After that, the following parameter update steps are performed to achieve the adaptability of the model: Based on the insulation degradation model and the newly acquired data, the likelihood function is defined , the likelihood function quantifies the likelihood of , stress data , initial state and degradation function Under the condition of The probability of the normal distribution at the observation point The probability density function value of .

[0114] Apply Bayes' theorem and combine it with prior probability distribution and likelihood function , calculate and update the parameter vector The posterior probability distribution of , ,in, is proportional to; calculation methods include: Markov chain Monte Carlo (MCMC) method, variational inference method or sequential Monte Carlo / particle filtering method.

[0115] The posterior distribution is obtained by After the samples, each parameter can be calculated The expected value, median, or mode of , and an adaptive insulation degradation prediction model is obtained by updating.

[0116] In the description of this specification, the description with reference to the terms "one embodiment / method", "some embodiments / methods", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / method or example are included in at least one embodiment / method or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment / method or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments / methods or examples. In addition, those skilled in the art may combine and combine different embodiments / methods or examples described in this specification and the features of different embodiments / methods or examples, unless they are contradictory.

[0117] Furthermore, the terms "first", "second", etc. are used herein for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly pointing to the number of technical features indicated. Thus, features defined with "first", "second" etc. can explicitly or implicitly include at least one of such features. In the description of the application, the meaning of "plurality" is at least two, for example two, three, etc., unless explicitly and specifically defined otherwise.

[0118] Those skilled in the art will understand that the above-described embodiments are merely intended to clarify the present application and are not intended to limit the scope of the present application. Other changes or modifications can be made to the above-described application by those skilled in the art, and such changes or modifications are still within the scope of the present application.

Claims

1. A towable live load transfer device, characterized in that: include: trailer chassis (4); A cabin (1) provided on the trailer chassis (4); At least one cable retracting and releasing mechanism (2), the cable retracting and releasing mechanism (2) being arranged inside the cabin (1) and being used for retracting and releasing a first bypass cable and a second bypass cable; A bypass load switch (3), the bypass load switch (3) being arranged inside the cabin (1), the bypass load switch (3) being arranged in series between the first bypass cable and the second bypass cable to form a continuous bypass circuit when the bypass load switch (3) is closed; A bypass system detection test platform comprises an insulation resistance tester and a continuity test indicator. The bypass detection test platform is used to perform an electrical integrity test on the bypass circuit.

2. A towable live load transfer device according to claim 1, characterized in that: Setting the connection ends of the bypass load switch (3) and the three phase conductors in the first bypass cable to A, B, and C, and setting the connection ends of the bypass load switch (3) and the three phase conductors in the second bypass cable to R, S, and T; The bypass system detection test platform also includes: six test terminals, which are respectively configured as an A-phase terminal, a B-phase terminal, a C-phase terminal, an R-phase terminal, an S-phase terminal, and a T-phase terminal, and are respectively connected to the distal ends of the phase conductors in the first bypass cable and the second bypass cable; A continuity test phase sequence transfer switch, comprising a first single-pole four-throw switch and a second single-pole four-throw switch, wherein the movable plates of the first single-pole four-throw switch and the second single-pole four-throw switch are respectively electrically connected to the two input terminals of the continuity test indicator; the three static contacts of the first single-pole four-throw switch are respectively electrically connected to the A-phase terminal, the B-phase terminal, and the C-phase terminal, and the three static contacts of the second single-pole four-throw switch are respectively electrically connected to the R-phase terminal, the S-phase terminal, and the T-phase terminal; the fourth static contacts of the first single-pole four-throw switch and the second single-pole four-throw switch are both in the open position; The test transfer switch includes six single-pole single-throw switches, wherein the A-phase terminal, the B-phase terminal, and the C-phase terminal are electrically connected to one test terminal of the insulation resistance tester through three single-pole single-throw switches, and the R-phase terminal, the S-phase terminal, and the T-phase terminal are electrically connected to the other test terminal of the insulation resistance tester through another three single-pole single-throw switches.

3. A towable live load transfer device according to claim 2, characterized in that: The number of the cable retracting and releasing mechanisms (2) is two, and the cable retracting and releasing mechanisms (2) include: An optical axis (2-15) and a bearing assembly, wherein both ends of the optical axis (2-15) are rotatably connected to the cabin (1) via the bearing assembly; A cable reel (2-10) is used for winding a corresponding bypass cable, and the cable reel (2-10) is coaxially fixed on the optical axis (2-15); a drive unit, which is fixed in the cabin (1), is connected to the optical axis (2-15), and is used to drive the optical axis (2-15) to drive the cable reel (2-10) to rotate; The outer portion of the cable reel (2-10) is provided with a latch (2-11), and the interior of the cabin (1) is provided with a fixing plate (2-12) adapted to the latch (2-11); The latch (2-11) is selectively engaged with the fixing plate (2-12), and locks the cable reel (2-10) when the latch (2-11) is engaged with the fixing plate (2-12), and releases the lock on the cable reel (2-10) when the latch (2-11) is separated; An insulating cross arm (5) is provided in the bypass cable lead-out area of ​​the cabin (1), and the insulating cross arm (5) is used to support, guide or fix the corresponding bypass cable during the process of leading out or retracting the bypass cable.

4. A towable live load transfer device according to claim 2, characterized in that: The bypass load switch (3) is installed inside the cabin (1) via a sliding mechanism, and the sliding mechanism is used to slide the bypass load switch (3) out of the cabin (1); The sliding mechanism comprises: a heavy-duty slide rail bracket (3-1), a heavy-duty slide rail (3-2) and a support plate, wherein the heavy-duty slide rail bracket (3-1) is fixedly connected to the internal structure of the cabin (1), the heavy-duty slide rail (3-2) is slidably connected to the heavy-duty slide rail bracket (3-1), the support plate is fixedly connected to the heavy-duty slide rail (3-2), and the bypass load switch (3) is mounted on the support plate.

5. A towable live load transfer device according to claim 2, characterized in that: The bypass load switch (3) comprises: Switch body; An electrically controlled operating mechanism, which is used to drive the movement of the main contacts; at least one voltage sensor and at least one current sensor configured to monitor a voltage value and a current value through the bypass circuit; At least one temperature sensor configured to monitor the temperature of the bypass load switch (3) body or its connected parts; and A data processing and forwarding module is electrically connected to the voltage sensor, the current sensor and the temperature sensor, and is used to collect and process monitoring data, and forward the monitoring data to an external device through a communication interface.

6. A method for using a towable live load transfer device, characterized in that: Based on the towable live load transfer device according to any one of claims 2 to 5, the method of use includes: Transport the trailer-type live load transfer device to the designated operation site and complete its deployment; Performing an electrical integrity test on a bypass circuit composed of a bypass cable and a bypass load switch (3) using a bypass system detection test platform, wherein the electrical integrity test includes at least a continuity test and an insulation test; After the electrical integrity test is completed, the far ends of the bypass cables are connected to the upstream power connection point and the downstream load connection point of the target line section to be loaded; Operating the bypass load switch (3) to close the bypass circuit, so that the bypass circuit is energized and takes on the load, and transfers the charge from the upstream power connection point to the downstream load connection point; Disconnect the normal power supply path of the target line section and perform operations on the target line section; During the period of power supply through the bypass circuit, the operating parameters of the bypass circuit are monitored in real time; After the operation of the target line section is completed, the normal power supply path of the target line section is restored, and the bypass load switch (3) is operated to disconnect the bypass circuit; Disconnect the remote end of the bypass cable and store the trailer-type live load transfer device; Update the usage record of the trailer-type live load transfer device and predict the remaining service life through an adaptive insulation degradation prediction model.

7. The method for using a towable live load transfer device according to claim 6, characterized in that: Methods for conducting continuity testing include: Selecting a phase path to be tested, the phase path starting from a phase conductor in the first bypass cable, passing through a corresponding closed phase contact in the bypass load switch (3), and ending at a corresponding phase conductor in the second bypass cable; Ensure that the phase contact corresponding to the phase path to be tested in the bypass load switch (3) is in a closed state; Operating the first single-pole four-throw switch to connect one input terminal of the continuity test indicator to a test connection post corresponding to a starting point of a phase path to be tested; operating the second single-pole four-throw switch to connect the other input terminal of the test indicator to the test connection post corresponding to the end point of the phase path to be tested; Activate the continuity test indicator to detect and confirm the electrical continuity status of the selected phase path to be tested.

8. The method for using a towable live load transfer device according to claim 6, characterized in that: Methods for performing insulation testing include: Determine the first test point and the second test point of the insulation path to be tested according to the preset insulation test items, wherein the preset insulation test items are: phase-to-phase insulation test, phase-to-ground insulation test or bypass load switch break insulation test; If a bypass load switch break insulation test is performed, ensuring that the corresponding phase contacts in the bypass load switch (3) forming part of the insulation path to be tested are in an open state; Operate the test transfer switch to connect the first test point to one test terminal of the insulation resistance tester; If the second test point is a phase terminal, operate the test transfer switch to connect the second test point to the other test terminal of the insulation resistance tester; or, if the second test point is a ground reference point, directly connect the other test terminal of the insulation resistance tester to the ground reference point; Ensure that other phase terminals not involved in the current specific insulation test path are kept disconnected from both test terminals of the insulation resistance tester through their corresponding single-pole single-throw switches; Starting the insulation resistance tester, applying a preset test voltage between the first test point and the second test point, and measuring the insulation resistance value therebetween; in, When performing a phase-to-phase insulation test or a bypass load switch disconnect insulation test, the first test point is selected from one of the A-phase terminal, B-phase terminal, C-phase terminal, R-phase terminal, S-phase terminal, or T-phase terminal, and the second test point is selected from another one of the A-phase terminal, B-phase terminal, C-phase terminal, R-phase terminal, S-phase terminal, or T-phase terminal that is different from the first test point; When performing a relative-to-ground insulation test, the first test point is selected from one of the A-phase terminal, B-phase terminal, C-phase terminal, R-phase terminal, S-phase terminal or T-phase terminal, and the second test point is the ground reference point of the towed live load transfer device.

9. The method for using a towable live load transfer device according to claim 6, characterized in that: Methods for predicting remaining service life using adaptive insulation degradation prediction models include: Repeatedly obtain test data of insulation performance parameters of one or more target insulation components after multiple operations or time intervals, and record operational stress data and environmental condition data associated with each test; wherein the insulation performance parameters include at least insulation resistance values ​​compensated for environmental factors; and the operational stress data includes at least one or more of the number of deployments, cumulative load time, or experienced current load magnitude; Based on the acquired insulation performance parameter test data, operating stress data, and environmental condition data, an adaptive insulation degradation prediction model for target insulation components is established; Using an adaptive insulation degradation prediction model, combined with preset future operating stress expectations, the future degradation trajectory of one or more key insulation performance parameters of the target insulation component is predicted; Estimate the remaining useful life of the target insulation component based on the predicted future degradation trajectory and predefined insulation performance failure thresholds.

10. The method for using a towable live load transfer device according to claim 9, characterized in that: Methods for establishing an adaptive insulation degradation prediction model include: Define state variables that characterize the insulation performance of the target insulation component , establish a variable for describing the state Basic model of insulation degradation over time, ,in, For the The time point of the test, is the initial or baseline health value of the insulation component, is the cumulative degradation function, which is used to describe the end point in time By parameter vector and operating stress The amount of decline in health status caused by the combined effects; To include parameter vector of model parameters; Number of deployments , cumulative load time , current load experienced and a vector collection of environmental conditions; is the uncertainty term of the model error; Initialize parameter vector The prior probability distribution of ; In getting the The insulation performance state variable of the newest target insulation component The actual observed value And the corresponding operating stress After that, the following parameter update steps are performed to achieve the adaptability of the model: Based on the insulation degradation model and the newly acquired data, the likelihood function is defined , which quantifies the likelihood function given the model parameters , stress data , initial state and degradation function Under the condition of probability; Apply Bayes' theorem, combined with the prior probability distribution and likelihood function , calculate and update the parameter vector The posterior probability distribution of , ,in, is proportional to; Use the updated posterior probability distribution The statistic of The current optimal estimate of is updated to obtain the adaptive insulation degradation prediction model.

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