Transformer station voltage remote measuring device

Abstract

A transformer station voltage remote measuring device relates to the technical field of voltage measurement, and comprises a voltage sending unit, a voltage receiving unit, a bus PT cabinet and a control cubicle, the voltage sending unit is arranged in the bus PT cabinet, the voltage receiving unit is arranged in the control cubicle, the voltage receiving unit is provided with a wireless receiving module, and the wireless receiving module is connected with the voltage receiving unit. The wireless receiving module is a WIFI receiving module, the voltage sending unit is composed of a limiting current clamp, a current clamp lead and a voltage sending device, the limiting current clamp is electrically connected with the voltage sending device through the current clamp lead, a loop miniature bus is arranged in the bus PT cabinet, the loop miniature bus in the bus PT cabinet is connected with the limiting current clamp, and the limiting current clamp is electrically connected with the voltage sending device through the current clamp lead. A loop miniature bus limiting device is arranged on the limiting current clamp; the method is easy to operate, the voltage of the transformer substation can be measured remotely, the situation that the measured voltage is unstable due to magnetic field changes caused by the fact that the current clamp induces non-current changes is avoided, and the purpose of improving the stability of voltage measurement is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of voltage measurement, and in particular to a remote voltage measurement device for a transformer substation. Background Art

[0002] As is known, for smart substations, digital quantities replace analog quantities in large quantities, resulting in interval voltage analog quantities only existing in the bus PT cabinet, while interval current is in each interval smart control cabinet. These two locations are usually far apart, and the voltage data in the bus PT cabinet is transmitted to the control cabinet for detection and monitoring by wireless transmission. However, the traditional voltage measurement device uses a clamp-on volt-ampere phase meter to detect the voltage of the bus in the bus PT cabinet. The current clamp of the clamp-on volt-ampere phase meter senses the magnetic field formed by the bus current in the bus PT cabinet to detect the voltage of the bus. The current clamp is hung on the bus in the bus PT cabinet, and the bus in the bus PT cabinet cannot be in the center of the annular clamp head on the current clamp, resulting in the current clamp sensing the magnetic field formed by the bus current in the bus PT cabinet. The current clamp will shake on the bus in the bus PT cabinet, resulting in the current clamp sensing the magnetic field change formed by the bus current in the bus PT cabinet is not caused by the current change, resulting in unstable measured data. Therefore, we propose a substation voltage remote measurement device. Summary of the invention

[0003] In order to overcome the shortcomings in the background technology, the present invention discloses a remote voltage measurement device for a substation. A loop busbar limiting device is provided on the limiting current clamp, and the current clamp is fixed on the loop busbar in the bus PT cabinet through the loop busbar limiting device, so that the loop busbar is always in the center of the annular clamp head of the current clamp, and the relative position of the loop busbar and the current clamp is fixed and does not change, thereby improving the stability of voltage measurement.

[0004] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical scheme: A transformer substation voltage remote measuring device comprises a voltage sending unit, a voltage receiving unit, a busbar PT cabinet and a control cabinet. The busbar PT cabinet is provided with a voltage sending unit, the control cabinet is provided with a voltage receiving unit, the voltage receiving unit is provided with a wireless receiving module, the wireless receiving module is a WIFI receiving module, the voltage sending unit is composed of a limiting current clamp, a current clamp lead and a voltage sending device, the limiting current clamp is electrically connected to the voltage sending device through the current clamp lead, the busbar PT cabinet is provided with a small loop busbar, and the small loop busbar in the busbar PT cabinet is connected to the limiting current clamp, the limiting current clamp is provided with a small loop busbar limiting device, and the small loop busbar limiting device is used to fix the small loop busbar at the center position of a ring current clamp head.

[0005] The limiting current clamp is composed of a limiting current clamp body and a loop busbar limiting device, the loop busbar limiting device is fixedly connected to the clamp head of the limiting current clamp body, the limiting current clamp body is composed of a first current clamp body, a second current clamp body, a first current clamp head, a second current clamp head, a rotating shaft and a spring, the lower part of the first current clamp head is fixedly connected to the upper part of the first current clamp body, the lower part of the second current clamp head is fixedly connected to the upper part of the second current clamp body, the first current clamp head is in contact with the second current clamp head, and the first current clamp head and the second current clamp head are in contact to form a ring, the lower part of the first current clamp body is movably linked to the rotating shaft, the lower part of the second current clamp body is movably linked to the rotating shaft, one end of the spring is fixedly connected to the lower surface of the first current clamp body, and the other end of the spring is fixedly connected to the lower surface of the second current clamp body.

[0006] The loop small busbar limiting device is composed of a first reset telescopic rod, a first small busbar fixing block, a second reset telescopic rod and a second small busbar fixing block. The first reset telescopic rod and the second reset telescopic rod have the same structural shape, the first small busbar fixing block and the second small busbar fixing block have the same structural shape, the fixed end of the first reset telescopic rod is fixedly connected to the inner wall of the first current clamp head, the telescopic end of the first reset telescopic rod is fixedly connected to the first small busbar fixing block, the fixed end of the second reset telescopic rod is fixedly connected to the inner wall of the second current clamp head, the telescopic end of the second reset telescopic rod is fixedly connected to the second small busbar fixing block, the first small busbar fixing block is in contact with the second small busbar fixing block, and the first small busbar fixing block and the second small busbar fixing block correspond in position.

[0007] The first small busbar fixing block contacts with the second small busbar fixing block to form a ring, and the ring formed by the first small busbar fixing block and the second small busbar fixing block are coaxial with the ring formed by the first current clamp and the second current clamp.

[0008] The first small busbar fixing block and the second small busbar fixing block are made of elastic material, and anti-corrosion pads are arranged on the inner walls of the first small busbar fixing block and the second small busbar fixing block.

[0009] The first reset telescopic rod is composed of a sleeve, a reset spring and a sliding rod. The top of the sleeve is provided with an opening, and a limit plate is provided at the opening of the sleeve. A reset spring and a sliding rod are provided in the sleeve. A limit block is provided at the bottom end of the sliding rod, and the sliding rod is slidably connected to the inner wall of the sleeve. One end of the reset spring is connected to the bottom of the inner wall of the sleeve, and the other end of the reset spring is connected to the bottom end of the sliding rod. The top of the sliding rod is connected to the first small busbar fixing block.

[0010] A first radiation-proof shell is provided on the front surface of the first current clamp body, a third radiation-proof shell is provided on the front surface of the second current clamp body, and the first radiation-proof shell and the third radiation-proof shell are in contact with each other to form a front surface radiation shell, the first radiation-proof shell and the third radiation-proof shell are both provided with grooves, and the groove of the first radiation-proof shell is connected with the groove of the third radiation-proof shell to form a circular small busbar hole, and the circular small busbar hole is in contact with the first current clamp head and the second current clamp head to form an annular coaxial center, a second radiation-proof shell is provided on the rear surface of the first current clamp body, a fourth radiation-proof shell is provided on the rear surface of the second current clamp body, and the second radiation-proof shell is in contact with the fourth radiation-proof shell to form a rear surface shell, the second radiation-proof shell and the fourth radiation-proof shell are both provided with grooves, and the groove of the second radiation-proof shell is connected with the groove of the fourth radiation-proof shell to form a circular small busbar hole, and the circular small busbar hole is in contact with the first current clamp head and the second current clamp head to form an annular coaxial center.

[0011] The grooves of the first radiation-proof shell and the third radiation-proof shell are both provided with protective pads, the protective pads on the first radiation-proof shell and the protective pads on the third radiation-proof shell are in contact with each other to form a small busbar protection pad, the grooves of the second radiation-proof shell and the fourth radiation-proof shell are both provided with protective pads, the protective pads on the second radiation-proof shell and the protective pads on the fourth radiation-proof shell are in contact with each other to form a small busbar protection pad The busbar PT cabinet is provided with an instrument room and a small busbar room, the loop small busbar is arranged in the small busbar room, and the voltage sending device is arranged in the instrument room.

[0012] The voltage sending device is composed of a device shell, a phase compensation module, a power amplification module, a voltage conversion module, a volt-ampere phase meter, a wireless sending module and a transmitting antenna. The phase compensation module, the power amplification module, the voltage conversion module, the volt-ampere phase meter, the wireless sending module and the transmitting antenna are all arranged in the device shell. The limiting current clamp is electrically connected to the input end of the phase compensation module through the current clamp lead, the output end of the phase compensation module is connected to the input end of the power amplification module, the output end of the power amplification module is electrically connected to the input end of the voltage conversion module, the output end of the voltage conversion module is electrically connected to the input end of the volt-ampere phase meter, the output end of the volt-ampere phase meter is electrically connected to the input end of the wireless sending module, the wireless sending module is provided with a transmitting antenna, and the wireless sending module is a WIFI sending module.

[0013] Due to the adoption of the above technical solution, the present invention has the following beneficial effects: The invention discloses a remote voltage measurement device for a transformer substation. A small loop busbar limiting device is arranged on a limiting current clamp. The current clamp is fixed on the small loop busbar in a busbar PT cabinet through the small loop busbar limiting device, so that the small loop busbar is always located at the center of the annular clamp head of the current clamp, and the relative position of the small loop busbar and the current clamp is fixed and unchanged, thereby improving the stability of voltage measurement. The invention is simple to operate, highly practical, and convenient to install. It can not only remotely measure the voltage of the transformer substation, but also prevent the measured voltage from being unstable due to magnetic field changes caused by non-current changes induced by the current clamp, thereby improving the stability of voltage measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the cross-section enlarged structure of the voltage sending unit of the bus PT cabinet of the present invention; Figure 3 It is a schematic diagram of the three-dimensional structure of the limiting current clamp of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of the limiting current clamp of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the voltage sending device of the present invention; Figure 6 It is a schematic diagram of the cross-sectional structure of the resetting telescopic rod of the present invention; 1. Busbar PT cabinet; 2. Instrument room; 3. Small busbar room; 4. Voltage sending unit; 5. Voltage sending device; 6. Current clamp lead; 7. Limiting current clamp; 8. First radiation protection shell; 9. Second radiation protection shell; 10. Third radiation protection shell; 11. Fourth radiation protection shell; 12. Limiting current clamp body; 13. Small busbar hole; 14. Small busbar protection pad; 15. First current clamp body; 16. Second current clamp body; 17. First current clamp head; 18. Second Current clamp head; 19. rotating shaft; 20. spring; 21. first resetting telescopic rod; 22. first small busbar fixing block; 23. second resetting telescopic rod; 24. second small busbar fixing block; 25. device housing; 26. phase compensation module; 27. power amplification module; 28. voltage conversion module; 29. ​​volt-ampere phase meter; 30. wireless transmission module; 31. transmitting antenna; 32. sleeve; 33. resetting spring; 34. sliding rod; 35. loop small busbar. DETAILED DESCRIPTION

[0015] The present invention can be explained in detail by the following examples, and the purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0016] Combined with Figures 1 to 6A substation voltage remote measurement device described in the specification includes a voltage sending unit 4, a voltage receiving unit, a busbar PT cabinet 1 and a control cabinet. The busbar PT cabinet 1 is provided with a voltage sending unit 4, the control cabinet is provided with a voltage receiving unit, the voltage receiving unit is provided with a wireless receiving module, the wireless receiving module is a WIFI receiving module, the voltage sending unit 4 is composed of a limiting current clamp 7, a current clamp lead 6 and a voltage sending device 5, the limiting current clamp 7 is electrically connected to the voltage sending device 5 through the current clamp lead 6, the busbar PT cabinet 1 is provided with a small loop bus 35, and the small loop bus 35 in the busbar PT cabinet 1 is connected to the limiting current clamp 7, the limiting current clamp 7 is provided with a small loop bus limit device, and the small loop bus limit device is used to fix the small loop bus 35 at the center position of the ring current clamp head.

[0017] The limiting current clamp 7 is composed of a limiting current clamp body 12 and a loop busbar limiting device, the loop busbar limiting device is fixedly connected to the clamp head of the limiting current clamp body 12, the limiting current clamp body 12 is composed of a first current clamp body 15, a second current clamp body 16, a first current clamp head 17, a second current clamp head 18, a rotating shaft 19 and a spring 20, the lower part of the first current clamp head 17 is fixedly connected to the upper part of the first current clamp body 15, the lower part of the second current clamp head 18 is fixedly connected to the upper part of the second current clamp body 16, the first current clamp head 17 is in contact with the second current clamp head 18, and the first current clamp head 17 and the second current clamp head 18 are in contact to form a ring, the lower part of the first current clamp body 15 is movably linked to the rotating shaft 19, the lower part of the second current clamp body 16 is movably linked to the rotating shaft 19, one end of the spring 20 is fixedly connected to the lower surface of the first current clamp body 15, and the other end of the spring 20 is fixedly connected to the lower surface of the second current clamp body 16.

[0018] The loop small busbar limiting device is composed of a first reset telescopic rod 21, a first small busbar fixing block 22, a second reset telescopic rod 23 and a second small busbar fixing block 24. The first reset telescopic rod 21 and the second reset telescopic rod 23 have the same structure and shape, the first small busbar fixing block 22 and the second small busbar fixing block 24 have the same structure and shape, the fixed end of the first reset telescopic rod 21 is fixedly connected to the inner wall of the first current clamp head 17, the telescopic end of the first reset telescopic rod 21 is fixedly connected to the first small busbar fixing block 22, the fixed end of the second reset telescopic rod 23 is fixedly connected to the inner wall of the second current clamp head 18, the telescopic end of the second reset telescopic rod 23 is fixedly connected to the second small busbar fixing block 24, the first small busbar fixing block 22 is in contact with the second small busbar fixing block 24, and the first small busbar fixing block 22 and the second small busbar fixing block 24 correspond in position.

[0019] The first small busbar fixing block 22 and the second small busbar fixing block 24 are in contact with each other to form a ring, and the ring formed by the first small busbar fixing block 22 and the second small busbar fixing block 24 are coaxial with the ring formed by the first current clamp 17 and the second current clamp 18 .

[0020] The first small busbar fixing block 22 and the second small busbar fixing block 24 are made of elastic material, and anti-corrosion pads are provided on the inner walls of the first small busbar fixing block 22 and the second small busbar fixing block 24 .

[0021] The first reset telescopic rod 21 is composed of a sleeve 32, a reset spring 33 and a sliding rod 34. The top of the sleeve 32 is provided with an opening, and a limit plate is provided at the opening of the sleeve 32. A reset spring 33 and a sliding rod 34 are provided in the sleeve 32. A limit block is provided at the bottom end of the sliding rod 34, and the sliding rod 34 is slidably connected to the inner wall of the sleeve 32. One end of the reset spring 33 is connected to the bottom of the inner wall of the sleeve 32, and the other end of the reset spring 33 is connected to the bottom end of the sliding rod 34. The top of the sliding rod 34 is connected to the first small busbar fixing block 22.

[0022] The first current clamp body 15 is provided with a first radiation-proof shell 8 on the front surface, the second current clamp body 16 is provided with a third radiation-proof shell 10 on the front surface, and the first radiation-proof shell 8 and the third radiation-proof shell 10 are in contact with each other to form a front radiation shell, the first radiation-proof shell 8 and the third radiation-proof shell 10 are both provided with a groove, and the groove of the first radiation-proof shell 8 is connected with the groove of the third radiation-proof shell 10 to form a circular small busbar hole 13, and the circular small busbar hole 13 is in contact with the first current clamp head 17 and the second current clamp head 18 to form a circular coaxial The first current clamp body 15 is provided with a second radiation protection shell 9 on the rear surface, the second current clamp body 16 is provided with a fourth radiation protection shell 11 on the rear surface, and the second radiation protection shell 9 is in contact with the fourth radiation protection shell 11 to form a rear surface shell, the second radiation protection shell 9 and the fourth radiation protection shell 11 are both provided with grooves, and the grooves of the second radiation protection shell 9 are connected with the grooves of the fourth radiation protection shell 11 to form a circular small busbar hole 13, and the circular small busbar hole 13 is in contact with the first current clamp head 17 and the second current clamp head 18 to form an annular coaxial center.

[0023] The grooves of the first radiation-proof shell 8 and the third radiation-proof shell 10 are both provided with protective pads, and the protective pads on the first radiation-proof shell 8 and the protective pads on the third radiation-proof shell 10 are in contact with each other to form a small busbar protection pad 14. The grooves of the second radiation-proof shell 9 and the fourth radiation-proof shell 11 are both provided with protective pads, and the protective pads on the second radiation-proof shell 9 and the protective pads on the fourth radiation-proof shell 11 are in contact with each other to form a small busbar protection pad 14. The busbar PT cabinet 1 is provided with an instrument room 2 and a small busbar room 3 , the loop small busbar 35 is arranged in the small busbar room 3 , and the voltage sending device 5 is arranged in the instrument room 2 .

[0024] The voltage transmitting device 5 is composed of a device housing 25, a phase compensation module 26, a power amplifying module 27, a voltage conversion module 28, a volt-ampere phase meter 29, a wireless transmitting module 30 and a transmitting antenna 31. The phase compensation module 26, the power amplifying module 27, the voltage conversion module 28, the volt-ampere phase meter 29, the wireless transmitting module 30 and the transmitting antenna 31 are all arranged in the device housing 25. The limiting current clamp 7 is electrically connected to the input end of the phase compensation module 26 through the current clamp lead 6. The output end of the phase compensation module 26 is connected to the input end of the power amplifying module 27. The output end of the power amplifying module 27 is electrically connected to the input end of the voltage conversion module 28. The output end of the voltage conversion module 28 is electrically connected to the input end of the volt-ampere phase meter 29. The output end of the volt-ampere phase meter 29 is electrically connected to the input end of the wireless transmitting module 30. The wireless transmitting module 30 is provided with a transmitting antenna 31. The wireless transmitting module 30 is a WIFI transmitting module.

[0025] Example, combined with Figures 1 to 6A substation voltage remote measuring device is disclosed, wherein an operator compresses a spring 20 by pressing a first current clamp 15 and a second current clamp 16, and the first current clamp 15 and the second current clamp 16 rotate along a rotating shaft 19 to separate a first current clamp head 17 and a second current clamp head 18, and places a small busbar 35 in a small busbar chamber 3 of a busbar PT cabinet 1 between the first current clamp head 17 and the second current clamp head 18, and then releases the first current clamp body 15 and the second current clamp body 16, and the spring 20 resets the first current clamp head 17 and the second current clamp head 18 to close, and at this time, the first small busbar 35 in the small busbar chamber 3 of the busbar PT cabinet 1 is placed between the first current clamp head 17 and the second current clamp head 18. The busbar fixing block 22 and the second small busbar fixing block 24 are clamped on the small busbar 35 of the loop. The small busbar fixing block is further connected to the current clamp head through a reset telescopic rod, so that it can adapt to small busbars 35 of different thicknesses. Preferably, the first reset telescopic rod 21 is composed of a sleeve 32, a reset spring 33 and a sliding rod 34. The top of the sleeve 32 is provided with an opening, and a limit plate is provided at the opening of the sleeve 32. The sleeve 32 is provided with a reset spring 33 and a sliding rod 34. The bottom end of the sliding rod 34 is provided with a limit block, and the sliding rod 34 is slidably connected to the inner wall of the sleeve 32. The reset spring 33 is provided at the bottom end of the sliding rod 34. 3 is connected to the bottom of the inner wall of the sleeve 32, and the other end of the reset spring 33 is connected to the bottom of the sliding rod 34. The top of the sliding rod 34 is connected to the first small busbar fixing block 22. The limiting current clamp 7 transmits the data generated by the current of the loop small busbar 35 to the phase compensation module 26 through the current clamp lead 6. Due to the inherent delay of the transmission of each circuit inside the device, it will have a certain impact on the voltage phase, and phase shift compensation is required. The data processed by the phase compensation module 26 is transmitted to the power amplifier module 27. The power amplifier module 27 is used to amplify the compensated small signal into a required signal that can drive the voltage conversion module 28. The voltage conversion module 28 converts the voltage after power amplification into a PT secondary voltage. The voltage conversion module 28 transmits the processed data to the volt-ampere phase meter 29. The volt-ampere phase meter 29 transmits the detected data to the wireless transmission module 30. The wireless transmission module 30 uses the transmitting antenna 31 to transmit the data to the voltage receiving unit in the control cabinet. The voltage receiving unit is provided with a wireless receiving module for receiving the data sent by the wireless transmission module 30. The wireless transmission is preferably a WIFI wireless transmission module. The transmitted data has a lower delay and the transmitted data is more stable.

[0026] Different electrical equipment are running in the busbar PT cabinet 1. The operation of the electrical equipment will generate a magnetic field that interferes with the magnetic field of the measuring department. Preferably, a first radiation-proof shell 8 is provided on the front surface of the first current clamp body 15, and a third radiation-proof shell 10 is provided on the front surface of the second current clamp body 16. The first radiation-proof shell 8 and the third radiation-proof shell 10 are in contact with each other to form a front radiation shell. The first radiation-proof shell 8 and the third radiation-proof shell 10 are both provided with a groove, and the groove of the first radiation-proof shell 8 is connected to the groove of the third radiation-proof shell 10 to form a circular small busbar hole 13, and the circular small busbar hole 13 is in contact with the first current clamp head 17 and the second current clamp head 18 to form an annular coaxial center. The first current clamp body 15 is provided with a second radiation-proof shell 9 on the rear surface, and the second current clamp body 16 is provided with a third radiation-proof shell 10 on the rear surface. Four radiation proof shells 11, and the second radiation proof shell 9 is in contact with the fourth radiation proof shell 11 to form a rear shell, the second radiation proof shell 9 and the fourth radiation proof shell 11 are both provided with grooves, and the groove of the second radiation proof shell 9 is connected with the groove of the fourth radiation proof shell 11 to form a circular small busbar hole 13, and the circular small busbar hole 13 is in contact with the first current clamp head 17 and the second current clamp head 18 to form an annular coaxial center, so that an anti-interference area is formed in the detection area, and the current clamp head needs to be stuck on the loop small busbar 35 for a long time. In order to avoid aging corrosion of the contacted parts, preferably, the first small busbar fixing block 22 and the second small busbar fixing block 24 are made of elastic material, and the inner walls of the first small busbar fixing block 22 and the second small busbar fixing block 24 are provided with anti-corrosion pads.

[0027] The parts of the present invention that are not described in detail are prior art. Although the present invention is specifically demonstrated and introduced in conjunction with the preferred implementation scheme, there are many methods and approaches to specifically implement the technical solution. The above is only a preferred implementation scheme of the present invention, but technical personnel in the relevant field should understand that various changes can be made to the present invention in form and details without departing from the spirit and scope of the present invention defined by the attached claims, which are all within the scope of protection of the present invention.

Claims

1. A substation voltage remote measurement device, comprising a voltage sending unit, a voltage receiving unit, a busbar PT cabinet and a control cabinet, wherein the busbar PT cabinet is provided with a voltage sending unit, the control cabinet is provided with a voltage receiving unit, the voltage receiving unit is provided with a wireless receiving module, the wireless receiving module is a WIFI receiving module, the voltage sending unit is composed of a limiting current clamp, a current clamp lead and a voltage sending device, the limiting current clamp is electrically connected to the voltage sending device through the current clamp lead, the busbar PT cabinet is provided with a small loop busbar, and the small loop busbar in the busbar PT cabinet is connected to the limiting current clamp, characterized in that: The limiting current clamp is provided with a small loop busbar limiting device, and the small loop busbar limiting device is used to fix the small loop busbar at the center position of the ring current clamp head.

2. A substation voltage remote measurement device according to claim 1, characterized in that: The limiting current clamp is composed of a limiting current clamp body and a loop busbar limiting device, the loop busbar limiting device is fixedly connected to the clamp head of the limiting current clamp body, the limiting current clamp body is composed of a first current clamp body, a second current clamp body, a first current clamp head, a second current clamp head, a rotating shaft and a spring, the lower part of the first current clamp head is fixedly connected to the upper part of the first current clamp body, the lower part of the second current clamp head is fixedly connected to the upper part of the second current clamp body, the first current clamp head is in contact with the second current clamp head, and the first current clamp head and the second current clamp head are in contact to form a ring, the lower part of the first current clamp body is movably linked to the rotating shaft, the lower part of the second current clamp body is movably linked to the rotating shaft, one end of the spring is fixedly connected to the lower surface of the first current clamp body, and the other end of the spring is fixedly connected to the lower surface of the second current clamp body.

3. A remote voltage measurement device for a substation according to claim 2, characterized in that: The loop small busbar limiting device is composed of a first reset telescopic rod, a first small busbar fixing block, a second reset telescopic rod and a second small busbar fixing block. The first reset telescopic rod and the second reset telescopic rod have the same structural shape, the first small busbar fixing block and the second small busbar fixing block have the same structural shape, the fixed end of the first reset telescopic rod is fixedly connected to the inner wall of the first current clamp head, the telescopic end of the first reset telescopic rod is fixedly connected to the first small busbar fixing block, the fixed end of the second reset telescopic rod is fixedly connected to the inner wall of the second current clamp head, the telescopic end of the second reset telescopic rod is fixedly connected to the second small busbar fixing block, the first small busbar fixing block is in contact with the second small busbar fixing block, and the first small busbar fixing block and the second small busbar fixing block correspond in position.

4. A substation voltage remote measurement device according to claim 3, characterized in that: The first small busbar fixing block contacts the second small busbar fixing block to form a ring, and the ring formed by the first small busbar fixing block and the second small busbar fixing block are coaxial with the ring formed by the first current clamp and the second current clamp.

5. A remote voltage measurement device for a substation according to any one of claims 3 or 4, characterized in that: The first small busbar fixing block and the second small busbar fixing block are made of elastic material, and anti-corrosion pads are arranged on the inner walls of the first small busbar fixing block and the second small busbar fixing block.

6. A substation voltage remote measurement device according to claim 3, characterized in that: The first reset telescopic rod is composed of a sleeve, a reset spring and a sliding rod. The top of the sleeve is provided with an opening, and a limit plate is provided at the opening of the sleeve. A reset spring and a sliding rod are provided in the sleeve. A limit block is provided at the bottom end of the sliding rod, and the sliding rod is slidably connected to the inner wall of the sleeve. One end of the reset spring is connected to the bottom of the inner wall of the sleeve, and the other end of the reset spring is connected to the bottom end of the sliding rod. The top of the sliding rod is connected to the first small busbar fixing block.

7. A substation voltage remote measurement device according to claim 2, characterized in that: A first radiation-proof shell is provided on the front surface of the first current clamp body, a third radiation-proof shell is provided on the front surface of the second current clamp body, and the first radiation-proof shell and the third radiation-proof shell are in contact with each other to form a front surface radiation shell, the first radiation-proof shell and the third radiation-proof shell are both provided with grooves, and the groove of the first radiation-proof shell is connected with the groove of the third radiation-proof shell to form a circular small busbar hole, and the circular small busbar hole is in contact with the first current clamp head and the second current clamp head to form an annular coaxial center, a second radiation-proof shell is provided on the rear surface of the first current clamp body, a fourth radiation-proof shell is provided on the rear surface of the second current clamp body, and the second radiation-proof shell is in contact with the fourth radiation-proof shell to form a rear surface shell, the second radiation-proof shell and the fourth radiation-proof shell are both provided with grooves, and the groove of the second radiation-proof shell is connected with the groove of the fourth radiation-proof shell to form a circular small busbar hole, and the circular small busbar hole is in contact with the first current clamp head and the second current clamp head to form an annular coaxial center.

8. A remote voltage measurement device for a substation according to claim 7, characterized in that: Protective pads are provided in the grooves of the first radiation protection shell and the third radiation protection shell, the protective pad on the first radiation protection shell and the protective pad on the third radiation protection shell are in contact with each other to form a small busbar protection pad, and protective pads are provided in the grooves of the second radiation protection shell and the fourth radiation protection shell, the protective pad on the second radiation protection shell and the protective pad on the fourth radiation protection shell are in contact with each other to form a small busbar protection pad.

9. A substation voltage remote measurement device according to claim 1, characterized in that: The busbar PT cabinet is provided with an instrument room and a small busbar room, the loop small busbar is arranged in the small busbar room, and the voltage sending device is arranged in the instrument room.

10. A substation voltage remote measurement device according to claim 1, characterized in that: The voltage sending device is composed of a device shell, a phase compensation module, a power amplification module, a voltage conversion module, a volt-ampere phase meter, a wireless sending module and a transmitting antenna. The phase compensation module, the power amplification module, the voltage conversion module, the volt-ampere phase meter, the wireless sending module and the transmitting antenna are all arranged in the device shell. The limiting current clamp is electrically connected to the input end of the phase compensation module through the current clamp lead, the output end of the phase compensation module is connected to the input end of the power amplification module, the output end of the power amplification module is electrically connected to the input end of the voltage conversion module, the output end of the voltage conversion module is electrically connected to the input end of the volt-ampere phase meter, the output end of the volt-ampere phase meter is electrically connected to the input end of the wireless sending module, the wireless sending module is provided with a transmitting antenna, and the wireless sending module is a WIFI sending module.

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