10kV pole-mounted voltage transformer wireless polarity testing device and method

Abstract

The invention discloses a 10kV pole-mounted voltage transformer wireless polarity testing device and method, and relates to the technical field of power system polarity detection devices, and the device is characterized in that the device comprises a control terminal, a polarity through-current end and a polarity feedback end; the polarity through-current end is connected to the primary side of the voltage transformer, and the polarity feedback end is connected to the secondary side of the voltage transformer; the control terminal, the polarity through-flow end and the polarity feedback end transmit information through the wireless remote control module. A current on-off instruction is sent to the polarity through-flow end through the transmitting end of the wireless remote control module, a polarity test result remotely sent by the polarity feedback end is received through the receiving end of the wireless remote control module, a worker can observe the test result on the ground by holding the terminal with a hand, polarity test of the 10kV pole-mounted voltage transformer in a wireless mode is achieved, and the test efficiency is improved. Direct contact with high-voltage equipment is avoided, and the risk of electric shock is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of polarity detection devices for power systems, and in particular relates to a wireless polarity testing device and method for a 10kV pole-mounted voltage transformer. Background Art

[0003] At present, the self-healing switch is an important primary and secondary integration equipment for the construction of Zhongwei's new distribution network. One of the important links is to perform polarity testing on its supporting pole-mounted voltage transformer. If the polarity test result is wrong, it will cause inaccurate fault location of the distribution network, load transfer failure and other consequences, seriously affecting the safe and stable operation and fault self-healing ability of the new distribution network.

[0004] During the construction of Zhongwei's new distribution network, a total of 2,047 self-healing switches and supporting pole-mounted voltage transformers have been installed in the past four years. With the improvement of the coverage level of self-healing switches, it is expected that the workload of 10kV pole-mounted voltage transformer polarity testing will continue to rise in 2025.

[0005] When conducting traditional polarity tests on 10kV pole-mounted voltage transformers, since the voltage transformer is locally installed on a utility pole 9-12 meters above the ground, an outdoor bracket needs to be built, which takes a long time. Workers stand on the outdoor bracket and there is a risk of falling from a height. The difficulty of working at heights increases, and the number of pole climbings is large, which seriously affects the success rate of the test. In February 2024, the team members conducted a survey and statistics on the success rate of tests in four county-level companies in Zhongwei area. The average success rate was 47%. To ensure the correctness of the results, multiple measurements are required.

[0006] In addition, the traditional polarity test method requires two workers to perform two pole-climbing and line-changing and polarity point-release operations. Since the detected current is very weak, only one person can perform the point-release operation and the other person can pay attention to the deflection of the multimeter pointer. The deflection of the multimeter pointer is fleeting, and it is difficult for two people to work together, which not only takes a long time, but also greatly reduces the success rate of the polarity test.

[0007] Therefore, the existing technology, process, method, etc. cannot meet the requirement of one-time success rate of polarity test of 10kV pole-mounted voltage transformer. In order to solve the above problems, it is necessary to design a 10kV pole-mounted voltage transformer wireless polarity test device and method. Summary of the invention

[0008] The technical problem to be solved by the present invention is to solve the deficiencies in the prior art and to design a new 10kV pole-mounted voltage transformer wireless polarity testing device. This 10kV pole-mounted voltage transformer wireless polarity testing device has a perfect structure and is based on the innovative application of wireless technology. It optimizes the traditional polarity point release operation mode, can reduce the number of times the tester climbs the pole and changes the pole, and effectively improves the success rate and efficiency of the 10kV pole-mounted voltage transformer polarity test.

[0009] The solution adopted by the present invention to solve the technical problem is:

[0010] 10kV pole mounted voltage transformer wireless polarity test device,

[0011] It is characterized in that

[0012] It includes a control terminal, a polarity current passing terminal and a polarity feedback terminal;

[0013] The polarity current-passing end and the polarity feedback end are both provided with a first power supply.

[0014] The polarity current-carrying end is connected to the primary side of the 10kV column voltage transformer through a fixing device.

[0015] The polarity feedback terminal is connected to the secondary side of the 10kV column voltage transformer;

[0016] The control terminal is provided with a first transmitting end of a wireless remote control module and a first receiving end of a wireless remote control module.

[0017] The polarity feedback end is provided with a second transmitting end of the wireless remote control module,

[0018] The polarity current-passing end is provided with a second receiving end of a wireless remote control module;

[0019] The first transmitting end of the wireless remote control module sends an instruction to the second receiving end of the wireless remote control module. The second receiving end of the wireless remote control module receives the instruction to control the primary side of the 10kV pole voltage transformer to pass current, so that the secondary side of the 10kV pole voltage transformer generates current, which is sent to the first receiving end of the wireless remote control module through the second transmitting end of the wireless remote control module;

[0020] The control terminal comprises a box body and a box cover.

[0021] A display panel is arranged in the box.

[0022] A polarity test circuit is provided between the display panel and the box.

[0023] The polarity test circuit is provided with a second power supply, a power switch, a phase switching switch and a polarity point release operation switch.

[0024] The display panel is provided with a power button, a phase switching handle, a polarity test button and a polarity display light.

[0025] The power button corresponds to the power switch,

[0026] The phase switching handle corresponds to the phase switching switch.

[0027] The polarity test button corresponds to the polarity point release operation switch.

[0028] The polarity testing circuit is connected to the polarity display lamp of the display panel.

[0029] As a preferred embodiment of the present invention, the polarity feedback terminal includes a DC transmitter.

[0030] As a preferred implementation of the present invention, the wireless remote control module adopts RF433 radio frequency wireless remote control technology.

[0031] As a preferred embodiment of the present invention, the polarity display lamp comprises an AB phase polarity display lamp and a BC phase polarity display lamp.

[0032] The AB phase polarity indicator lamp and the BC phase polarity indicator lamp each include a positive polarity indicator lamp of the first winding, a negative polarity indicator lamp of the first winding, a positive polarity indicator lamp of the second winding, and a negative polarity indicator lamp of the second winding.

[0033] As a preferred embodiment of the present invention, the fixing device comprises a wiring clamp and a wire, and the wiring clamp is fixed on the primary side of a 10kV pole-mounted voltage transformer.

[0034] As a preferred embodiment of the present invention, the wiring clamp comprises a fixing frame.

[0035] The fixing frame is provided with prefabricated holes.

[0036] The inner thread of the prefabricated hole is fixed with an adjusting rod.

[0037] A support plate is arranged on one side of the adjusting rod extending into the prefabricated hole.

[0038] As a preferred embodiment of the present invention, the wiring clamp comprises a first clamping rod and a second clamping rod.

[0039] The first clamping rod and the second clamping rod are connected via a rotating shaft,

[0040] An elastic support member is arranged between the first clamping rod and the second clamping rod.

[0041] As a preferred embodiment of the present invention, both the first power source and the second power source adopt 24V lithium battery packs.

[0042] As a preferred embodiment of the present invention, Chinese characters corresponding to the positions of the power button, phase switching handle, polarity test button and polarity display light are provided on the display panel.

[0043] A wireless polarity test method for 10kV pole-mounted voltage transformer.

[0044] It is characterized in that

[0045] The following steps are involved:

[0046] S1: The staff climbs the pole to install the polarity current-carrying end on the terminal post on the primary side of the voltage transformer, turns on the power switch of the polarity current-carrying end, and connects the polarity feedback end to the secondary side lead-out wire of the voltage transformer according to different phases and windings;

[0047] S2: The ground tester presses the power button of the control terminal, turns the phase switching handle of the handheld control terminal, and presses the polarity test button;

[0048] S3: Observe that the polarity indicator light is on.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] 1. The 10kV pole-mounted voltage transformer wireless polarity test device of the present invention is based on the innovative application of wireless technology. The first transmitting end of the wireless remote control module sends a current on-off instruction to the polarity current-passing end, and the first receiving end of the wireless remote control module receives the polarity test result remotely sent by the polarity feedback end. The staff can observe the test result on the ground handheld terminal, thereby realizing the polarity test of the 10kV pole-mounted voltage transformer in a wireless manner, avoiding direct contact with high-voltage equipment and reducing the risk of electric shock.

[0051] In addition, workers can directly observe the test results on the ground handheld terminal without having to frequently perform high-altitude operations or collaborate with other workers, saving time and improving work efficiency.

[0052] 2. The device of the present invention switches the phases through the control terminal. The test personnel do not need to perform complicated wiring operations at high altitudes. The staff can climb the pole once to fix the wiring clamps of the fixing device on the AB phase and BC phase wiring posts of the 10kV pole voltage transformer. After fixing, the staff can switch different phases on the handheld terminal on the ground.

[0053] The number of pole climbing times has been optimized from the original 2 times to the current 1 time, reducing the number of pole climbing and pole changing operations for testers, thereby reducing the safety risks caused by high-altitude operations. The traditional polarity point release operation mode has been optimized, effectively improving the success rate and efficiency of the 10kV pole-mounted voltage transformer polarity test. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a specific structural diagram of the 10kV pole-mounted voltage transformer wireless polarity test device proposed by the present invention;

[0055] Figure 2 This is a flow chart of the 10kV pole-mounted voltage transformer wireless polarity testing device method proposed by the present invention;

[0056] Figure 3 This is a circuit diagram of the control terminal of the 10kV pole-mounted voltage transformer wireless polarity test device proposed by the present invention;

[0057] Figure 4 The circuit diagram of the polarity feedback end of the 10kV pole-mounted voltage transformer wireless polarity test device proposed by the present invention;

[0058] Figure 5 It is a circuit diagram of the polarity current-carrying end of the 10kV pole-mounted voltage transformer wireless polarity test device proposed by the present invention;

[0059] Figure 6 A schematic diagram of a display panel of a 10kV pole-mounted voltage transformer wireless polarity test device proposed by the present invention;

[0060] Figure 7 This is a flow chart of the traditional polarity test method of the 10kV pole-mounted voltage transformer wireless polarity test device proposed by the present invention;

[0061] Figure 8 A schematic diagram of a wiring clamp of a 10kV pole-mounted voltage transformer wireless polarity test device proposed by the present invention;

[0062] Fig. 9 This is a schematic diagram of the wiring clamp of the 10kV pole-mounted voltage transformer wireless polarity test device proposed by the present invention.

[0063] Description of reference numerals:

[0064] 1. Fixed frame,

[0065] 2. Adjustment lever,

[0066] 3. Support plate,

[0067] 4. The first clamping rod,

[0068] 5. Second clamping rod,

[0069] 6. Elastic support parts,

[0070] 7. Rotating shaft,

[0071] 8. Control terminal,

[0072] 9. Polarity flow end,

[0073] 10. Polarity feedback terminal,

[0074] 11. Box body,

[0075] 12. Box cover,

[0076] 13. Display panel,

[0077] 14. Power button,

[0078] 15. Phase switching handles,

[0079] 16. Polarity test button,

[0080] 17. AB phase polarity indicator light,

[0081] 18. BC phase polarity indicator light,

[0082] 19. Fixing device,

[0083] 20. Wiring clamp,

[0084] 21. Wire. DETAILED DESCRIPTION

[0085] The specific implementation of the present invention is described below in conjunction with the accompanying drawings and embodiments:

[0086] It should be noted that the structures, colors, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0087] At the same time, in the description of the present invention, it should be understood that the terms "one end", "the other end", "middle", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0088] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0089] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0090] like Figure 1 As shown, the present invention proposes a 10kV pole-mounted voltage transformer wireless polarity testing device, which includes a control terminal 8, a polarity current-passing terminal 9 and a polarity feedback terminal 10.

[0091] The polarity current-passing terminal 9 and the polarity feedback terminal 10 are both provided with a first power supply for supplying the various small devices inside the device.

[0092] When in use, the polarity current-passing terminal 9 is connected to the primary side of the 10kV pole voltage transformer through the fixing device 19, and the polarity feedback terminal 10 is connected to the secondary side of the 10kV pole voltage transformer. The polarity current-passing terminal 9 applies a test voltage source to the primary side of the 10kV pole voltage transformer, and the polarity feedback terminal 10 feeds back the secondary side current of the 10kV pole voltage transformer. The control terminal 8 is operated by the working staff to complete the polarity test process.

[0093] The polarity current-passing terminal 9 is used to apply a test voltage source to the primary side of the 10kV pole voltage transformer to ensure that at least 20 mA of current can be generated in the secondary winding of the 10kV pole voltage transformer in the current-passing state, which is used to start the second transmitting end of the wireless remote control module of the polarity feedback terminal 10.

[0094] To generate 20 mA current on the secondary side of the 10kV pole voltage transformer, a DC voltage of at least 24 V must be applied to the primary side of the 10kV pole voltage transformer. You can choose "24V lithium battery pack" and "solar battery".

[0095] In this embodiment, both the first power supply and the second power supply adopt 24V lithium battery packs. The 24V lithium battery pack is more economical than solar cells, and the starting current can reach 20 mA or more with a compliance rate of 100% in 20 consecutive polarity current tests, making the polarity current test process more stable and reliable.

[0096] like Figure 8 and Fig. 9As shown, the fixing device 19 is used to fix the polarity current-carrying end 9 on the terminal on the primary side of the voltage transformer on the 10kV column, so that the test wiring of the device is reliably connected to the primary terminal of the voltage transformer, and assists in completing the current flow to the primary terminal of the voltage transformer.

[0097] The fixing device 19 can be fixed in two ways: a binding band and a clamping mechanism. The binding band fixing is to use a nylon binding band to tie the polarity current-carrying end 9 to the 10kV pole-mounted voltage transformer, which is easy to operate. The clamping mechanism is to use the test line connection clamps 20 on both sides of the polarity current-carrying end 9 to clamp them on the 2-phase terminal posts on the primary side of the 10kV pole-mounted voltage transformer, which is easy to operate.

[0098] The safety of the clamping mechanism depends only on the clamping force of the test line connection clamp 20. The safety of the strapping fixing method depends on the tension value and the binding position of the strap. If the strap is tied at a component that is not closed, there is a risk of slipping.

[0099] In this embodiment, the fixing device 19 selects a clamping mechanism, specifically comprising a wiring clamp 20 and a wire 21, the wire 21 connects the wiring clamp 20 and the polarity current-carrying end 9, and the wiring clamp 20 is fixed on the primary side of the 10kV pole voltage transformer. The primary side of the 10kV pole voltage transformer and the polarity current-carrying end 9 are connected by the wiring clamp 20, so that the primary side of the 10kV pole voltage transformer passes current.

[0100] like Figure 8 As shown, as another embodiment of the present invention, the clamping mechanism includes a fixing frame 1, the fixing frame 1 is provided with a prefabricated hole, an adjusting rod 2 is fixed with threads in the prefabricated hole, and a support plate 3 is provided on one side of the adjusting rod 2 extending into the prefabricated hole. The space between the support plate 3 and the fixing frame 1 is used to clamp the 10KV pole-mounted voltage transformer.

[0101] Preferably, fixing grooves may be provided on opposite sides of the support plate 3 and the fixing frame 1 to fit the terminal posts of the 10KV column voltage transformer.

[0102] like Fig. 9 As shown, as another embodiment of the present invention, the clamping mechanism includes a first clamping rod 4 and a second clamping rod 5, and the first clamping rod 4 and the second clamping rod 5 are connected by a rotating shaft 7, and the fixing device 19 is fixed to the terminal of the 10KV pole voltage transformer through the first clamping rod 4 and the second clamping rod 5.

[0103] An elastic support member 6 is provided between the first clamping rod 4 and the second clamping rod 5. Preferably, the elastic support member 6 may be a spring to ensure that the first clamping rod 4 and the second clamping rod 5 are stably fixed on the terminal of the 10KV column voltage transformer.

[0104] like Figure 3-5As shown, the control terminal 8 is provided with a first transmitting end of a wireless remote control module and a first receiving end of a wireless remote control module. The first transmitting end of the wireless remote control module is used to send a current flow instruction to the polarity current flow end 9, and the first receiving end of the wireless remote control module is used to receive the voltage of the secondary winding of the 10kV pole voltage transformer sent by the polarity feedback 1 device.

[0105] like Figure 4 As shown, the polarity feedback terminal 10 is provided with a second transmitting terminal of the wireless remote control module. The figure shows the wireless remote control transmitting terminal of the polarity feedback terminal 10. The second transmitting terminal of the wireless remote control module is used to send the voltage of the secondary winding of the 10kV pole voltage transformer to the control terminal 8.

[0106] like Figure 5 As shown, the polarity current-passing terminal 9 is provided with a second receiving terminal of the wireless remote control module, and the polarity current-passing wireless remote control receiving terminal of the polarity current-passing terminal 9 is shown in the figure, which is used to receive the current-passing instruction sent by the first transmitting terminal of the wireless remote control module.

[0107] The specific operating principle is: the first transmitting end of the wireless remote control module sends instructions to the second receiving end of the wireless remote control module. The second receiving end of the wireless remote control module receives the instructions to control the current on the primary side of the 10kV pole voltage transformer, so that the secondary side of the 10kV pole voltage transformer generates current, which is sent to the first receiving end of the wireless remote control module through the second transmitting end of the wireless remote control module.

[0108] In addition, the wireless remote control module adopts wireless remote control technology. Wireless remote control technology refers to a method of performing polarity point release operation through wireless remote control. The specific process is that the transmitting end of the wireless remote control module sends a current on-off instruction to the polarity current passing end 9, and the receiving end of the wireless remote control module receives the polarity test result sent remotely by the polarity feedback end 10.

[0109] Wireless remote control technology can use mature wireless remote control technologies such as Wi-Fi, RF433 radio frequency, Bluetooth, LoRa, etc.

[0110] At present, the maximum vertical distance from the ground to the installation height of a 10kV pole-mounted voltage transformer is 12 meters, and the maximum vertical distance from the ground to the installation height of a pole-mounted distribution box is 6 meters. Therefore, the remote control distance of the selected wireless remote control technology should meet the requirement of at least 12 meters.

[0111] The remote control distances of the above four wireless remote control technologies all meet the requirements, but the RF433 radio frequency has the advantages of low power consumption, light weight, and low production cost, and does not require the help of wireless network operation services and device pairing operations.

[0112] In this embodiment, the wireless remote control module adopts RF433 radio frequency wireless remote control technology.

[0113] like Figure 1 and Figure 6 As shown, the control terminal 8 comprises a box body 11 and a box cover 12, and the box body 11 and the box cover 12 are connected by hinges or other devices that are available on the market to connect the box body 11 and the box cover 12. The internal circuit and various components can be stored, the polarity display light of the control terminal 8 is displayed on the display panel 13 in the box body 11, and buttons corresponding to the circuit are set on the display panel 13 for the staff to operate.

[0114] like Figure 6 As shown, a display panel 13 is provided in the box body 11 , and the staff only needs to operate the display panel 13 when performing the polarity test.

[0115] A polarity testing circuit is provided between the display panel 13 and the housing 11 , and the polarity testing circuit achieves a specific polarity testing purpose.

[0116] In addition, necessary components required for voltage transformer polarity testing are arranged in the box 11, and existing components available on the market can be selected.

[0117] The polarity test circuit is provided with a second power supply, a power switch, a phase switching switch and a polarity point release operation switch, and the display panel 13 is provided with a power button 14, a phase switching handle 15, a polarity test button 16 and a polarity display light.

[0118] like Figure 3 As shown, the working power button 14 in the figure is a power switch, the polarity point release operation button switch in the figure is a polarity point release operation switch, and the test phase switching switch in the figure is a phase switching switch.

[0119] The power button 14 corresponds to the power switch, the phase switching handle 15 corresponds to the phase switching switch, the polarity test button 16 corresponds to the polarity point release operation switch, and the polarity test circuit is connected to the polarity display light of the display panel 13.

[0120] The second power supply supplies energy to the control terminal 8, the power switch control circuit is turned on, the phase switching switch switches the AB\BC phases, and the polarity point release operation confirms the polarity test operation.

[0121] like Figure 6 As shown, the display panel 13 is provided with Chinese characters corresponding to the positions of the power switch, the phase switching handle 15, the polarity test button 16 and the polarity display light for confirmation by the staff.

[0122] like Figure 4 As shown, the polarity feedback terminal 10 includes a DC transmitter. In this embodiment, 8 DC transmitters are provided, and the DC transmitter is used to convert the small current of the secondary winding of the voltage transformer into a starting current that can start the corresponding wireless remote control module.

[0123] like Figure 6 As shown, the polarity indicator light includes an AB phase polarity indicator light 17 and a BC phase polarity indicator light 18. The AB phase polarity indicator light 17 and the BC phase polarity indicator light 18 both include a positive polarity indicator light of the first winding, a negative polarity indicator light of the first winding, a positive polarity indicator light of the second winding, and a negative polarity indicator light of the second winding.

[0124] The light indication feedback method has the advantages of high one-time success rate, low power consumption and production cost in terms of test result feedback. In addition, the light indication feedback method is light in weight, small in size and easy to install.

[0125] In this embodiment, the positive polarity indicator lights are all blue indicator lights, and the negative polarity indicator lights are all red indicator lights.

[0126] As another implementation manner of the present invention, the feedback form of the test result may also be a voice broadcast feedback form.

[0127] A wireless polarity test method for a 10kV pole-mounted voltage transformer, such as Figure 2 As shown,

[0128] The following steps are involved:

[0129] S1: The staff climbs the pole to install the polarity current-carrying terminal 9 on the terminal post on the primary side of the voltage transformer, turns on the power switch of the polarity current-carrying terminal 9, and connects the polarity feedback terminal 10 to the secondary winding lead-out wire of the voltage transformer according to different phases and windings;

[0130] Specifically, the staff climbs the pole to install the polarity current-passing terminal 9 on the AB phase terminal and the BC phase terminal on the primary side of the voltage transformer, turns on the power switch of the polarity current-passing terminal 9, and then connects the test line of the polarity feedback terminal 10 to the secondary winding lead-out line of the voltage transformer according to different phases and windings.

[0131] S2: The ground tester turns on the power of the control terminal 8, rotates the phase switching handle 15 of the handheld control terminal 8, and presses the polarity test button 16;

[0132] Specifically, after turning on the power of the control terminal 8:

[0133] First, turn the phase switching handle 15 to select the switching gear to AB phase, and press the polarity test button 16. At this time, the polarity display light should correctly display that the positive polarity display light group of the first winding of the AB phase polarity display light 17 and the blue indicator light of the positive polarity display light of the second winding are on;

[0134] Then turn the phase switching handle 15 to select the switching position as BC phase, and press the polarity test button 16. At this time, the polarity display light should correctly display the positive polarity display light group of the first winding of the BC phase voltage transformer and the blue indicator light of the positive polarity display light of the second winding is on.

[0135] S3: Observe that the polarity indicator light is on.

[0136] Specifically, the blue indicator lights of the positive polarity display light group of the first winding and the positive polarity display light of the second winding of the AB phase polarity display light 17 are on, indicating that the polarity test of the AB phase voltage transformer is correct;

[0137] The positive polarity display light group of the first winding and the blue indicator light of the positive polarity display light of the second winding of the BC phase polarity display light 18 are on, indicating that the polarity test of the BC phase voltage transformer is correct.

[0138] like Figure 7 As shown, Figure 7 This is a flow chart of the traditional polarity test method. As can be seen from the flow chart, the traditional polarity test method requires two workers to perform two pole-climbing and line-changing and polarity point-release operations. Since the detected current is very weak, during the traditional operation, only one person can perform the point-release operation, and one person can pay attention to the deflection of the multimeter pointer. The deflection of the multimeter pointer is fleeting, and it is difficult for two people to work together, which not only takes a long time, but also greatly reduces the success rate of the polarity test.

[0139] Figure 2 This is a flow chart of the testing method of the device of the present invention. According to the comparison, the innovative device reduces the number of test steps by 5 steps compared with the traditional testing method, and the number of pole climbing is optimized from the original 2 times to the current 1 time, which reduces the risk of people falling from heights.

[0140] In addition, the on-site staff used the traditional polarity test method and the new device polarity test method to conduct polarity tests on 20 voltage transformers in Shapotou Company, Zhongning Company, Haiyuan Company, and Haixing Company in Zhongwei area, respectively, and calculated the test time, and compared the time consumption of the new and old methods. The comparison results are shown in Table 1.

[0141] Table 1 Statistics of polarity test results using new and old methods

[0142]

[0143]

[0144] According to the test results, the current polarity test using the new device takes 141 seconds, which saves 571 seconds compared to the traditional polarity test, thereby improving test efficiency.

[0145] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

[0146] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A 10kV pole-mounted voltage transformer wireless polarity test device, It is characterized in that It comprises a control terminal (8), a polarity flow terminal (9) and a polarity feedback terminal (10); The polarity current passing end (9) and the polarity feedback end (10) are both provided with a first power supply. The polarity current-carrying end (9) is connected to the primary side of a 10 kV column voltage transformer via a fixing device (19). The polarity feedback terminal (10) is connected to the secondary side of the 10kV column voltage transformer; The control terminal (8) is provided with a first transmitting end of a wireless remote control module and a first receiving end of a wireless remote control module. The polarity feedback end (10) is provided with a second transmitting end of a wireless remote control module, The polarity current-passing end (9) is provided with a second receiving end of a wireless remote control module; The first transmitting end of the wireless remote control module sends an instruction to the second receiving end of the wireless remote control module. The second receiving end of the wireless remote control module receives the instruction to control the primary side of the 10kV pole voltage transformer to pass current, so that the secondary side of the 10kV pole voltage transformer generates current, which is sent to the first receiving end of the wireless remote control module through the second transmitting end of the wireless remote control module; The control terminal (8) comprises a box body (11) and a box cover (12). A display panel (13) is arranged in the box (11). A polarity testing circuit is provided between the display panel (13) and the housing (11). The polarity test circuit is provided with a second power supply, a power switch, a phase switching switch and a polarity point release operation switch. The display panel (13) is provided with a power button (14), a phase switching handle (15), a polarity test button (16) and a polarity display light. The power button (14) corresponds to the power switch. The phase switching handle (15) corresponds to the phase switching switch. The polarity test button (16) corresponds to the polarity point release operation switch. The polarity testing circuit is connected to the polarity display lamp of the display panel (13).

2. The 10kV pole-mounted voltage transformer wireless polarity test device according to claim 1, It is characterized in that The polarity feedback terminal (10) comprises a DC transmitter.

3. The 10kV pole-mounted voltage transformer wireless polarity test device according to claim 1, It is characterized in that The wireless remote control module adopts RF433 radio frequency wireless remote control technology.

4. The 10kV pole-mounted voltage transformer wireless polarity test device according to claim 1, It is characterized in that The polarity display lamp comprises an AB phase polarity display lamp (17) and a BC phase polarity display lamp (18), The AB phase polarity indicator lamp (17) and the BC phase polarity indicator lamp (18) each comprise a positive polarity indicator lamp of the first winding, a negative polarity indicator lamp of the first winding, a positive polarity indicator lamp of the second winding, and a negative polarity indicator lamp of the second winding.

5. The 10kV pole-mounted voltage transformer wireless polarity test device as claimed in claim 1, It is characterized in that The fixing device (19) comprises a connection clamp (20) and a conductor (21), and the connection clamp (20) is fixed on the primary side of a 10kV pole-mounted voltage transformer.

6. The 10kV pole-mounted voltage transformer wireless polarity test device as claimed in claim 5, It is characterized in that The wiring clamp (20) comprises a fixing frame (1), The fixing frame (1) is provided with prefabricated holes. An adjusting rod (2) is fixed to the inner thread of the prefabricated hole. A support plate (3) is provided on the side where the adjusting rod (2) extends into the prefabricated hole.

7. The 10kV pole-mounted voltage transformer wireless polarity test device as claimed in claim 5, It is characterized in that The wiring clamp (20) comprises a first clamping rod (4) and a second clamping rod (5), The first clamping rod (4) and the second clamping rod (5) are connected via a rotating shaft (7). An elastic support member (6) is provided between the first clamping rod (4) and the second clamping rod (5).

8. The 10kV pole-mounted voltage transformer wireless polarity test device according to claim 1, It is characterized in that The first power source and the second power source both use 24V lithium battery packs.

9. The 10kV pole-mounted voltage transformer wireless polarity test device as claimed in claim 2, It is characterized in that The display panel (13) is provided with Chinese character marks corresponding to the positions of the power button (14), the phase switching handle (15), the polarity test button (16) and the polarity display light.

10. A wireless polarity test method for 10kV pole-mounted voltage transformer, Using the 10kV pole-mounted voltage transformer wireless polarity test device as described in any one of claims 1 to 9, It is characterized in that The following steps are involved: S1: A staff member climbs a pole to install the polarity current-carrying end (9) on the terminal post on the primary side of the voltage transformer, turns on the power switch of the polarity current-carrying end (9), and connects the polarity feedback end (10) to the secondary side lead-out wire of the voltage transformer according to different phases and windings; S2: The ground tester presses the power button (14) of the control terminal (8), rotates the phase switching handle (15) of the handheld control terminal (8), and presses the polarity test button (16); S3: Observe that the polarity indicator light is on.

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