Portable non-inductive transfer device and transfer method thereof

Abstract

The invention discloses a portable non-inductive transfer device, which comprises a box body, an internal low-voltage circuit breaker, a function control panel, a programmable controller, a phase sequence nuclear phase module and a communication aviation interface, and is characterized in that the internal low-voltage circuit breaker is arranged in a cavity of the box body, and a power supply terminal exposed out of the box body is arranged at a power supply end of the internal low-voltage circuit breaker; a load terminal of the internal low-voltage circuit breaker is provided with a load wiring terminal exposed out of the box body, a cavity opening of the box body is covered with a function control panel, a communication aviation interface is arranged on the box body, the function control panel is provided with a programmable controller and a phase sequence nuclear phase module, and the phase sequence nuclear phase module is connected with the programmable controller. The programmable controller and the phase sequence nuclear phase module are connected with the internal low-voltage circuit breaker, and the programmable controller is connected with the communication aviation interface. The loop closing function of the low-voltage main switch can be remotely controlled, the electric energy data of the low-voltage main switch are collected, the low-voltage cabinet main switch is controlled to be switched on and switched off to achieve loop closing operation before zone area contact quit, and an operator does not need to hold a phase checking instrument with a hand for manual phase checking.

Description

Technical Field

[0001] The present invention relates to the technical field of sensorless power transfer, in particular to a portable sensorless power transfer device and a power transfer method thereof. Background Art

[0002] At present, low-voltage power supply transfer in substations is mainly carried out by generator trucks and substation low-voltage liaison transfer. Due to the high operating cost, high noise and exhaust emissions of generator trucks, "substation low-voltage liaison transfer" is preferred in low-voltage non-stop power supply operations. The two generations of low-voltage closing devices developed in recent years are limited in large-scale application on site due to their large size and complex liaison closing design.

[0003] In addition, in the power system, the phase difference of three-phase alternating current is called phase sequence. The correctness of phase sequence is crucial to the normal operation of power equipment. The portable power transfer device ensures that the corresponding parameters of the power data of the two substations match to achieve smooth loop closing and avoid impact on the power grid or damage to equipment. The access cable is an important link in the convenient power transfer device to achieve low-voltage substation connection and loop closing. It is required to strictly follow the three-phase line sequence relationship for cable access. The existing portable non-inductive power transfer device requires personnel to manually check the phase with a phase checker before connecting the cable, which cannot solve the problem of short-term power outage operation in the power supply link. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a portable, non-inductive power transfer device and power transfer method that can remotely control the closing function of a low-voltage main switch, collect the electric energy data of the low-voltage main switch and control the opening and closing of the low-voltage cabinet main switch to realize the closing operation before the substation connection is exited, without the need for operators to manually check the phase with a handheld phase check instrument, thus solving the problem of short-term power outage operations in the power supply link.

[0005] The present invention is realized through the following technical scheme: a portable inductive power transfer device, comprising a box, an internal low-voltage circuit breaker, a functional control panel, a programmable controller, a phase sequence check module, and a communication aviation interface, wherein the internal low-voltage circuit breaker is arranged in the cavity of the box, the power supply end of the internal low-voltage circuit breaker is provided with a power supply terminal exposed to the box, the load end of the internal low-voltage circuit breaker is provided with a load terminal exposed to the box, the cavity opening of the box is covered with the functional control panel, the communication aviation interface is arranged on the box, the programmable controller and the phase sequence check module are arranged on the functional control panel, the programmable controller and the phase sequence check module are connected to the internal low-voltage circuit breaker, and the programmable controller is connected to the communication aviation interface.

[0006] Furthermore: the function control panel is provided with a low-voltage circuit breaker power supply end indicator light and a low-voltage circuit breaker load end indicator light which are electrically connected to the internal low-voltage circuit breaker, and the function control panel is provided with an opening, and the switch power supply and switch load of the internal low-voltage circuit breaker are arranged towards the opening direction.

[0007] Further: the function control panel is provided with an internal low-voltage circuit breaker function control area, and the internal low-voltage circuit breaker function control area is provided with an internal low-voltage circuit breaker opening indicator light, an internal low-voltage circuit breaker closing indicator light, an internal low-voltage circuit breaker opening button, and an internal low-voltage circuit breaker closing button electrically connected to the internal low-voltage circuit breaker.

[0008] Furthermore: the function control panel is provided with an external low-voltage circuit breaker function control area, and the external low-voltage circuit breaker function control area is provided with a low-voltage cabinet circuit breaker opening indicator light, a low-voltage cabinet circuit breaker closing indicator light, a low-voltage cabinet circuit breaker opening button, and a low-voltage cabinet circuit breaker closing button.

[0009] Furthermore: the function control panel is provided with a power switch button for starting or stopping the portable sensorless power supply device, a first switching switch for switching the closing loop function or the standby automatic transfer function, a second switching switch for switching the primary closing loop function or the secondary closing loop function and a buzzer.

[0010] Furthermore: the phase sequence checking module includes a phase sequence meter phase checking control module, a phase checking meter automatic switching control module, a phase sequence module protection module and a phase sequence light indication module. The phase checking meter automatic switching control module turns on or off the phase sequence meter phase checking control module by switching on a switch, and the phase sequence module protection module is used to periodically cut off the contact between the phase sequence checking module and the power supply.

[0011] Furthermore: the phase sequence light indication module includes a positive phase sequence indicator light and a reverse phase sequence indicator light.

[0012] Furthermore: the box body is in the shape of a rectangular parallelepiped, the left and right side walls of the box body are respectively provided with handles, and the bottom wall of the box body is provided with a weighing plate and a telescopic push-pull rod.

[0013] The power transfer method using the portable non-inductive power transfer device described above includes a loop closing operation method and a standby automatic switching operation method;

[0014] The ring closing operation method comprises the following steps:

[0015] S11. According to the on-site survey, place the portable non-sensing power transfer device at a suitable location on the work site;

[0016] S12. The communication aviation interface on the box of the portable non-sensing transfer device is connected to the communication aviation interface of the external data control communication of the station area 1 through a special control communication cable;

[0017] S13. Connect the load terminal on the box of the portable non-inductive power transfer device to the load end of the low-voltage switch in area 1 through a cable, connect the power terminal on the box of the portable non-inductive power transfer device to the load end of the switch in area 2 through a cable, and take insulation measures, and connect the bottom line of the portable non-inductive power transfer device;

[0018] S14. The phase sequence checking module automatically checks the phase sequence of the phase line. If the reverse phase sequence indicator light is on, the phase sequence is reversed, and step S13 is readjusted. If the positive phase sequence indicator light is on, the phase sequence is normal, and step S15 is performed;

[0019] S15. Switch the first switch on the function control panel to the closed loop, and switch the second switch to a closed loop;

[0020] S16. The programmable controller closes the circuit and collects and adjusts the closed-loop synchronous electric energy data. When the electric energy data reaches the closed-loop range value, the programmable controller indicates that synchronization is allowed. The internal low-voltage circuit breaker closing button in the internal low-voltage circuit breaker function control area is pressed, and the internal low-voltage circuit breaker is closed;

[0021] S17. The operation is completed, restore the city power to the power supply side of the low-voltage main switch, switch the second switch to the secondary closing loop, close the low-voltage main switch in substation 1, and press the internal low-voltage circuit breaker disconnect button in the internal low-voltage circuit breaker function control area.

[0022] Furthermore: the standby automatic operation method comprises the following steps:

[0023] S21. According to the on-site survey, place the portable non-conductive power transfer device at a suitable location on the work site;

[0024] S22. The communication aviation interface on the box of the portable non-sensing transfer device is connected to the communication aviation interface of the external data control communication of the station area 1 through a special control communication cable;

[0025] S23. Connect the load terminal on the box of the portable non-inductive power transfer device to the load end of the low-voltage switch in area 1 through a cable, connect the power terminal on the box of the portable non-inductive power transfer device to the load end of the switch in area 2 through a cable, and take insulation measures, and connect the bottom line of the portable non-inductive power transfer device;

[0026] S24. The phase sequence check module automatically checks the phase sequence of the phase line. If the reverse phase sequence indicator light is on, the phase sequence is reversed, and step S23 is readjusted. If the positive phase sequence indicator light is on, the phase sequence is normal, and step S25 is performed;

[0027] S25. Switch the first switch on the function control panel to the standby automatic switch, and switch the second switch to the primary closing loop;

[0028] S26. The low-voltage main switch of area 1 is disconnected, and the programmable controller of the portable non-inductive power transfer device automatically controls the internal low-voltage circuit breaker to close the switch according to the collected power data signal, and transfers the power of area 2 to the load end of area 1;

[0029] S27. After the fault in substation 1 is repaired, close the main low-voltage switch of substation 1. The programmable controller of the portable sensorless power transfer device automatically controls the internal low-voltage circuit breaker to open the switch based on the collected power data information, disconnecting the power of substation 2 and supplying power from substation 1.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention arranges the phase sequence checking module on the functional control panel. It only needs to connect the portable senseless power supply device to the cable according to the operation requirements, and then the phase sequence meter checking control module of the phase sequence checking module can be directly powered on to check the phase sequence, and the positive phase sequence indicator light and the reverse phase sequence indicator light can be used to directly display the checked phase to the operator for confirmation, so that the line sequence of the cable connected to the portable senseless power supply device can be checked in time. Before the portable senseless power supply device is connected to the cable, there is no need for the operator to manually check the phase with the handheld phase checking instrument. In addition, the automatic switching control module of the phase checking instrument can turn on or off the phase sequence meter checking control module within a preset time according to the preset time, and the on-off conversion is timed, operation-free, and can play a protective role. The contact between the phase sequence checking module and the power supply is cut off by the phase sequence module protection module in a timed manner, so as to avoid long-term current flow in the phase sequence checking module, resulting in long-term power-on overheating and causing failure or damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural block diagram of the present invention;

[0033] Figure 2 It is a structural block diagram of the phase sequence core module of the present invention.

[0034] Description of the accompanying drawings: 1-box, 2-internal low-voltage circuit breaker, 3-function control panel, 4-programmable controller, 5-phase sequence phase verification module, 6-power terminal, 7-load terminal, 8-low-voltage circuit breaker power terminal indicator light, 9-low-voltage circuit breaker load terminal indicator light, 10-internal low-voltage circuit breaker function control area, 11-internal low-voltage circuit breaker opening indicator light, 12-internal low-voltage circuit breaker closing indicator light, 13-internal low-voltage circuit breaker opening button, 14-internal low-voltage circuit breaker closing button, 15-external low 1-low-voltage cabinet circuit breaker function control area, 16-low-voltage cabinet circuit breaker opening indicator light, 17-low-voltage cabinet circuit breaker closing indicator light, 18-low-voltage cabinet circuit breaker opening button, 19-low-voltage cabinet circuit breaker closing button, 20-power switch button, 21-first switching switch, 22-second switching switch, 23-buzzer, 24-phase sequence meter phase control module, 25-phase meter automatic switching control module, 26-phase sequence module protection module, 27-phase sequence light indication module, 28-positive phase sequence indicator light, 29-reverse phase sequence indicator light. DETAILED DESCRIPTION

[0035] The present invention is described below in conjunction with embodiments

[0036] Reference Figure 1 and Figure 2 A portable non-inductive power supply transfer device comprises a box body 1, an internal low-voltage circuit breaker 2, a functional control panel 3, a programmable controller 4, a phase sequence check module 5, and a communication aviation interface. The internal low-voltage circuit breaker 2 is arranged in the cavity of the box body 1, and the power supply end of the internal low-voltage circuit breaker 2 is provided with a power supply terminal 6 exposed to the box body 1, and the load end of the internal low-voltage circuit breaker 2 is provided with a load terminal 7 exposed to the box body 1. The cavity opening of the box body 1 is covered with a functional control panel 3, and the communication aviation interface is arranged on the box body 1. A programmable controller 4 and a phase sequence check module 5 are arranged on the functional control panel 3, and the programmable controller 4 and the phase sequence check module 5 are connected to the internal low-voltage circuit breaker 2, and the programmable controller 4 is connected to the communication aviation interface.

[0037] The programmable controller 4 is used to collect electric energy data and control the opening and closing of the internal low-voltage circuit breaker 2.

[0038] The function control panel 3 is provided with a low-voltage circuit breaker power supply end indicator light 8 and a low-voltage circuit breaker load end indicator light 9 which are electrically connected to the internal low-voltage circuit breaker 2. An opening is provided on the function control panel, and the switch power supply and switch load of the internal low-voltage circuit breaker 2 are arranged toward the opening direction.

[0039] The function control panel 3 is provided with an internal low-voltage circuit breaker function control area 10, and the internal low-voltage circuit breaker function control area 10 is provided with an internal low-voltage circuit breaker opening indicator light 11 electrically connected to the internal low-voltage circuit breaker 2, an internal low-voltage circuit breaker closing indicator light 12, an internal low-voltage circuit breaker opening button 13, and an internal low-voltage circuit breaker closing button 14.

[0040] The function control panel 3 is provided with an external low-voltage circuit breaker function control area 15, and the external low-voltage circuit breaker function control area 15 is provided with a low-voltage cabinet circuit breaker opening indicator light 16, a low-voltage cabinet circuit breaker closing indicator light 17, a low-voltage cabinet circuit breaker opening button 18, and a low-voltage cabinet circuit breaker closing button 19.

[0041] The function control panel 3 is provided with a power switch button 20 for starting or stopping the portable sensorless power transfer device, a first switching switch 21 for switching the closing loop function or the standby automatic transfer function, a second switching switch 22 for switching the primary closing loop function or the secondary closing loop function, and a buzzer 23.

[0042] The phase sequence checking module 5 includes a phase sequence meter checking control module 24, a phase check meter automatic switching control module 25, a phase sequence module protection module 26 and a phase sequence light indication module 27. The phase check meter automatic switching control module 25 turns on or off the phase sequence meter checking control module 24 through a switching switch, and the phase sequence module protection module 26 is used to periodically cut off the contact between the phase sequence checking module 5 and the power supply.

[0043] The phase sequence light indication module 27 indicates the line sequence of the cable to the user.

[0044] The phase sequence light indication module 27 includes a positive phase sequence indicator light 28 and a reverse phase sequence indicator light 29 .

[0045] The positive phase sequence indicator light 27 and the reverse phase sequence indicator light 28 are arranged on the function control panel 3 .

[0046] The box body 1 is in the shape of a cuboid. The left and right side walls of the box body 1 are respectively provided with handles. The bottom wall of the box body 1 is provided with a weighing plate and a telescopic push-pull rod.

[0047] The box body 1 of the present invention is light in weight, small in size, and easy to carry through the handle.

[0048] The power transfer method using the portable non-inductive power transfer device described above includes a loop closing operation method and a standby automatic switching operation method;

[0049] The ring closing operation method comprises the following steps:

[0050] S11. Based on the on-site investigation, place the portable non-conductive power transfer device at a suitable location on the work site.

[0051] S12. Connect the communication aviation interface on the box of the portable non-sensing transfer device to the communication aviation interface of the external data control communication of station area 1 through a special control communication cable.

[0052] S13. Connect the load terminal on the box of the portable non-inductive power transfer device to the load terminal of the low-voltage switch in substation 1 through a cable, connect the power terminal on the box of the portable non-inductive power transfer device to the load terminal of the switch in substation 2 through a cable, and take insulation measures, and connect the bottom line of the portable non-inductive power transfer device.

[0053] S14. The phase sequence checking module automatically checks the phase sequence of the phase line. If the reverse phase sequence indicator light is on, the phase sequence is reversed, and step S13 is readjusted. If the positive phase sequence indicator light is on, the phase sequence is normal, and step S15 is performed.

[0054] S15. Switch the first switch on the function control panel to the closed loop, and switch the second switch to the single closed loop.

[0055] S16. The programmable controller closes the circuit and collects and adjusts the closing-loop synchronous electric energy data. When the electric energy data reaches the closing-loop range value, the programmable controller indicates that synchronization is allowed. Press the internal low-voltage circuit breaker closing button in the internal low-voltage circuit breaker function control area to close the internal low-voltage circuit breaker.

[0056] S17. The operation is completed, restore the city power to the power supply side of the low-voltage main switch, switch the second switch to the secondary closing loop, close the low-voltage main switch in substation 1, and press the internal low-voltage circuit breaker disconnect button in the internal low-voltage circuit breaker function control area.

[0057] The automatic standby operation method comprises the following steps:

[0058] S21. Based on the on-site investigation, place the portable non-conductive power transfer device at a suitable location on the work site.

[0059] S22. Connect the communication aviation interface on the box of the portable non-sensing transfer device to the communication aviation interface of the external data control communication of station area 1 through a special control communication cable.

[0060] S23. Connect the load terminal on the box of the portable non-inductive power transfer device to the load terminal of the low-voltage switch in substation 1 through a cable, connect the power terminal on the box of the portable non-inductive power transfer device to the load terminal of the switch in substation 2 through a cable, and take insulation measures, and connect the bottom line of the portable non-inductive power transfer device.

[0061] S24. The phase sequence checking module automatically checks the phase sequence of the phase line. If the reverse phase sequence indicator light is on, the phase sequence is reversed, and step S23 is readjusted. If the positive phase sequence indicator light is on, the phase sequence is normal, and step S25 is performed.

[0062] S25. Switch the first switch on the function control panel to the standby automatic transfer mode, and switch the second switch to the primary closing mode.

[0063] S26. The low-voltage main switch of substation 1 is disconnected, and the programmable controller of the portable non-inductive power transfer device automatically controls the internal low-voltage circuit breaker to close the circuit according to the collected power data signal, and transfers the electricity of substation 2 to the load end of substation 1.

[0064] S27. After the fault in substation 1 is repaired, close the main low-voltage switch of substation 1. The programmable controller of the portable sensorless power transfer device automatically controls the internal low-voltage circuit breaker to open the switch based on the collected power data information, disconnecting the power of substation 2 and supplying power from substation 1.

[0065] The present invention arranges the phase sequence checking module on the function control panel, and the three-phase line sequence relationship can be automatically sequenced for cable access without operation. The phase sequence checking module has a phase sequence module protection module to prevent the phase sequence checking module from malfunctioning or being damaged due to overheating caused by long-term power-on, thereby realizing that there is no need for personnel to manually check the phase with a phase checking instrument before the transfer equipment is connected to the cable, thereby solving the problem of short-term power outage in the power supply link. In addition, the portable non-inductive transfer device can remotely control the closing function of the low-voltage main switch, collect the electric energy data of the low-voltage main switch, and control the closing and opening of the low-voltage cabinet main branch switch to realize the closing function before the substation connection is exited, while optimizing the real-time monitoring and early warning of the transfer current and temperature, and can be applied to conventional infrastructure and other projects that affect the power supply of the substation.

[0066] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. A portable non-sensing power transfer device, characterized in that: It includes a box body, an internal low-voltage circuit breaker, a functional control panel, a programmable controller, a phase sequence check module, and a communication aviation interface. The internal low-voltage circuit breaker is arranged in the cavity of the box body. The power supply end of the internal low-voltage circuit breaker is provided with a power supply terminal exposed to the box body. The load end of the internal low-voltage circuit breaker is provided with a load terminal exposed to the box body. The cavity opening of the box body is covered with the functional control panel. The communication aviation interface is arranged on the box body. The programmable controller and the phase sequence check module are arranged on the functional control panel. The programmable controller and the phase sequence check module are connected to the internal low-voltage circuit breaker, and the programmable controller is connected to the communication aviation interface.

2. The portable non-conductive power transfer device according to claim 1 is characterized in that: The function control panel is provided with a low-voltage circuit breaker power supply end indicator light and a low-voltage circuit breaker load end indicator light which are electrically connected to the internal low-voltage circuit breaker. The function control panel is provided with an opening, and the switch power supply and switch load of the internal low-voltage circuit breaker are arranged toward the opening.

3. The portable non-conductive power transfer device according to claim 2 is characterized in that: The function control panel is provided with an internal low-voltage circuit breaker function control area, and the internal low-voltage circuit breaker function control area is provided with an internal low-voltage circuit breaker opening indicator light, an internal low-voltage circuit breaker closing indicator light, an internal low-voltage circuit breaker opening button, and an internal low-voltage circuit breaker closing button electrically connected to the internal low-voltage circuit breaker.

4. The portable non-conductive power transfer device according to claim 3 is characterized in that: The function control panel is provided with an external low-voltage circuit breaker function control area, and the external low-voltage circuit breaker function control area is provided with a low-voltage cabinet circuit breaker opening indicator light, a low-voltage cabinet circuit breaker closing indicator light, a low-voltage cabinet circuit breaker opening button, and a low-voltage cabinet circuit breaker closing button.

5. The portable non-conductive power transfer device according to claim 4 is characterized in that: The function control panel is provided with a power switch button for starting or stopping the portable sensorless power supply device, a first switching switch for switching the closing loop function or the standby automatic transfer function, a second switching switch for switching the primary closing loop function or the secondary closing loop function, and a buzzer.

6. The portable non-conductive power transfer device according to claim 5, characterized in that: The phase sequence checking module includes a phase sequence meter phase checking control module, a phase checking meter automatic switching control module, a phase sequence module protection module and a phase sequence light indication module. The phase checking meter automatic switching control module turns on or off the phase sequence meter phase checking control module by switching on a switch, and the phase sequence module protection module is used to periodically cut off the contact between the phase sequence checking module and the power supply.

7. The portable non-conductive power transfer device according to claim 6, characterized in that: The phase sequence light indication module includes a positive phase sequence indicator light and a reverse phase sequence indicator light.

8. The portable non-conductive power transfer device according to claim 7, characterized in that: The box body is in the shape of a rectangular parallelepiped. The left and right side walls of the box body are respectively provided with handles. The bottom wall of the box body is provided with a weighing plate and a telescopic push-pull rod.

9. A power transfer method using the portable non-conductive power transfer device according to any one of claims 1 to 8, characterized in that: Including loop closing operation method and standby automatic operation method; The ring closing operation method comprises the following steps: S11. According to the on-site survey, place the portable non-sensing power transfer device at a suitable location on the work site; S12. The communication aviation interface on the box of the portable non-sensing transfer device is connected to the communication aviation interface of the external data control communication of the station area 1 through a special control communication cable; S13. Connect the load terminal on the box of the portable non-inductive power transfer device to the load end of the low-voltage switch in area 1 through a cable, connect the power terminal on the box of the portable non-inductive power transfer device to the load end of the switch in area 2 through a cable, and take insulation measures, and connect the bottom line of the portable non-inductive power transfer device; S14. The phase sequence checking module automatically checks the phase sequence of the phase line. If the reverse phase sequence indicator light is on, the phase sequence is reversed, and step S13 is readjusted. If the positive phase sequence indicator light is on, the phase sequence is normal, and step S15 is performed; S15. Switch the first switch on the function control panel to the closed loop, and switch the second switch to a closed loop; S16. The programmable controller closes the circuit and collects and adjusts the closed-loop synchronous electric energy data. When the electric energy data reaches the closed-loop range value, the programmable controller indicates that synchronization is allowed. The internal low-voltage circuit breaker closing button in the internal low-voltage circuit breaker function control area is pressed, and the internal low-voltage circuit breaker is closed; S17. The operation is completed, restore the city power to the power supply side of the low-voltage main switch, switch the second switch to the secondary closing loop, close the low-voltage main switch in substation 1, and press the internal low-voltage circuit breaker disconnect button in the internal low-voltage circuit breaker function control area.

10. The power transfer method using the portable non-conductive power transfer device according to claim 9 is characterized in that: The automatic standby operation method comprises the following steps: S21. According to the on-site survey, place the portable non-conductive power transfer device at a suitable location on the work site; S22. The communication aviation interface on the box of the portable non-sensing transfer device is connected to the communication aviation interface of the external data control communication of the station area 1 through a special control communication cable; S23. Connect the load terminal on the box of the portable non-inductive power transfer device to the load end of the low-voltage switch in area 1 through a cable, connect the power terminal on the box of the portable non-inductive power transfer device to the load end of the switch in area 2 through a cable, and take insulation measures, and connect the bottom line of the portable non-inductive power transfer device; S24. The phase sequence check module automatically checks the phase sequence of the phase line. If the reverse phase sequence indicator light is on, the phase sequence is reversed, and step S23 is readjusted. If the positive phase sequence indicator light is on, the phase sequence is normal, and step S25 is performed; S25. Switch the first switch on the function control panel to the standby automatic switch, and switch the second switch to the primary closing loop; S26. The low-voltage main switch of area 1 is disconnected, and the programmable controller of the portable non-inductive power transfer device automatically controls the internal low-voltage circuit breaker to close the switch according to the collected power data signal, and transfers the power of area 2 to the load end of area 1; S27. After the fault in substation 1 is repaired, close the main low-voltage switch of substation 1. The programmable controller of the portable sensorless power transfer device automatically controls the internal low-voltage circuit breaker to open the switch based on the collected power data information, disconnecting the power of substation 2 and supplying power from substation 1.

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