Method and equipment for monitoring operation state of power transformer on line

Abstract

The invention discloses a method and equipment for monitoring the running state of a power transformer on line, and the equipment comprises an elastic plate, the edge of the outer side of the elastic plate is sleeved with two rectangular frames, the two rectangular frames are arranged front and back, and the left and right sides of each rectangular frame are fixedly connected with fixed columns. Through mutual cooperation of structures such as an elastic plate, an insulating protective sleeve, a limiting plate and an elastic rope, under the condition that the transformer is powered off, the elastic plate is arranged on the surface of the transformer in a sleeving mode, the two ends of the elastic plate are wound on a supporting frame for supporting the transformer, a limiting frame is located in the elastic plate, and an inserting plate is placed in the limiting frame; the limiting frame and the inserting plate are limited through the first bolt, the rectangular frame is moved, the rectangular frame drives the insulating protective sleeve to move, the transformer wiring terminal is wrapped with the insulating protective sleeve, and the insulating protective sleeve is connected through the elastic rope.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer monitoring, and specifically to a method and device for on-line monitoring of the operating state of power transformers. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. Transformers are basic equipment for power transmission and distribution and are widely used in industries, agriculture, transportation, urban communities, etc. Transformers may malfunction during high-intensity operation, and in this case, monitoring equipment is needed to monitor the operating state of the transformers.

[0003] However, there are some problems in the use of existing transformer monitoring equipment. Existing transformer monitoring equipment is usually large in size and not easy to install on the surface of transformers. Existing monitoring equipment only has the function of monitoring, and there may be other areas that need to be protected on the surface of transformers. At the same time, existing monitoring equipment usually only has one monitoring function and may not be able to detect multiple states. For the temperature monitoring of transformers, the temperature monitoring range is limited, which will reduce the applicable range of the monitoring equipment. Summary of the Invention

[0004] Aiming at the above-mentioned shortcomings of the existing technology, the purpose of the present invention is to provide a method and device for on-line monitoring of the operating state of power transformers, realizing that the monitoring equipment itself is convenient for installation and disassembly, has flexibility, and can also protect the wiring terminals of the transformer during the monitoring process of the transformer, and can monitor both the vibration frequency and the temperature of the transformer.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A method for on-line monitoring of the operating state of power transformers, including the following steps:

[0006] Step 1: Install a temperature detection mechanism, a vibration detection mechanism, and other protection mechanisms on the surface of the transformer through an installation mechanism, and the other protection mechanisms protect the wiring terminals of the transformer;

[0007] Step 2: The temperature detection mechanism moves on the surface of the transformer to more accurately find the area with abnormal temperature on the surface of the transformer;

[0008] Step 3: The vibration detection mechanism monitors the vibration frequency of the transformer;

[0009] Step 4: Both the temperature detection mechanism and the vibration detection mechanism transmit the classification results of the health status to the cloud server through a wireless communication module and trigger warning signals of corresponding levels.

[0010] The present invention provides another technical solution: a device for on-line monitoring of the operating state of a power transformer, including an elastic plate. Two rectangular frames are sleeved on the outer edge of the elastic plate. The two rectangular frames are arranged front and back. Fixed columns are fixedly connected to both the left and right sides of the rectangular frames. First connecting rings are fixedly connected to the outer edges of the fixed columns. First blind holes are opened at the ends of the fixed columns far away from the rectangular frames. Insulating protective sleeves are arranged on both the left and right sides of the rectangular frames. Connecting columns are fixedly connected to the bottoms of the insulating protective sleeves close to the rectangular frames. Second connecting rings are fixedly connected to the outer edges of the connecting columns. Adjacent first connecting rings and second connecting rings are arranged in mutual contact. Second blind holes are opened at the ends of the connecting columns close to the rectangular frames. Elastic ropes are fixedly connected in the adjacent first blind holes and second blind holes together. Moving mechanisms are arranged on both the left and right sides of the elastic plate.

[0011] Preferably, the moving mechanism includes two U-shaped plates. The two U-shaped plates are arranged left and right. The two U-shaped plates are sleeved on both the left and right sides of the elastic plate together. A number of first threaded holes are opened on both the left and right sides of the elastic plate. Second threaded holes are opened on the U-shaped plates. Second bolts are threadedly connected in the adjacent first threaded holes and second threaded holes together. Curved plates are fixedly connected to the bottoms of the U-shaped plates far away from the elastic plate. Slide rails are opened at the tops of the curved plates. Two connecting rods penetrate through the slide rails. Fixed disks are fixedly connected to the bottoms of the connecting rods. Limiting rings are fixedly connected to the outer edges of the connecting rods close to the tops. A driving vehicle is fixedly connected to the tops of the adjacent two connecting rods together. The fixed disks are located at the bottoms of the curved plates. The limiting rings are located at the tops of the curved plates. L-shaped plates are fixedly connected to both the front and back sides of the driving vehicle. Through holes are opened on the L-shaped plates. Connecting threaded rods penetrate through the through holes. Temperature sensors are fixedly connected to the bottoms of the connecting threaded rods. First nuts are threadedly connected to the outer edges of the connecting threaded rods close to the tops. Second nuts are threadedly connected to the outer edges of the connecting threaded rods close to the centers.

[0012] Preferably, a slot is opened at the center of the bottom of the elastic plate. A number of vertical holes are opened at the top of the inner cavity of the slot. A number of limiting holes are opened at the center of the top of the elastic plate. The limiting holes and the vertical holes are mutually communicated. The diameter of the limiting holes is larger than that of the vertical holes. Two micro-transmitter type vibration sensors are arranged in the slot. Limiting threaded rods are fixedly connected to the tops of the micro-transmitter type vibration sensors. The tops of the limiting threaded rods penetrate through the inner cavities of the vertical holes and extend into the inner cavities of the limiting holes. Third nuts are threadedly connected to the outer edges of the limiting threaded rods close to the tops. The third nuts are located in the limiting holes.

[0013] Preferably, through slots are formed on both the front and rear sides of the elastic plate. A limiting frame is penetrated in the through slot. One side of the limiting frame is fixedly connected to one side of the elastic plate. An insertion plate is arranged in the inner cavity of the limiting frame. A limiting plate is fixedly connected to the side of the insertion plate away from the limiting frame. A plurality of third threaded holes are formed on the limiting plate. Three fourth threaded holes are formed on both the left and right sides of the limiting frame. Three fifth threaded holes are formed in the inner cavity of the insertion plate. A first bolt is arranged on the side of the limiting plate close to the limiting frame. The right end of the first bolt penetrates through the adjacent fourth threaded hole and fifth threaded hole and is threadedly connected thereto.

[0014] Preferably, a plurality of female buttons and male buttons are fixedly connected to the outer edge of the insulating protective sleeve. The adjacent male buttons are located in the inner cavities of the adjacent female buttons.

[0015] Preferably, an elastic arc-shaped plate is fixedly connected to the tops of two adjacent L-shaped plates together.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] Through the mutual cooperation among structures such as the elastic plate, the insulating protective sleeve, the limiting plate, and the elastic rope, the present invention can, when the transformer is powered off, sleeve the elastic plate on the surface of the transformer, wind both ends of the elastic plate around the support frame supporting the transformer. The limiting frame is located inside the elastic plate. Place the insertion plate inside the limiting frame, and limit the limiting frame and the insertion plate through the first bolt. Move the rectangular frame, and the rectangular frame drives the insulating protective sleeve to move, and wrap the insulating protective sleeve around the transformer terminal. The insulating protective sleeve is connected through the elastic rope.

[0018] Through the mutual cooperation among structures such as the micro transmitter type vibration sensor, the temperature sensor, the curved plate, and the driving vehicle, the present invention can install the micro transmitter type vibration sensor inside the elastic plate, and the micro transmitter type vibration sensor is attached to the surface of the transformer, so as to detect the vibration frequency of the transformer. Install the temperature sensor on the driving vehicle, remotely control the driving vehicle to move, and the driving vehicle makes a curved movement through the cooperation of the connecting rod and the curved plate. The temperature sensor moves on the surface of the transformer, thereby expanding the monitoring range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three-dimensional view of the present invention;

[0020] Figure 2 is an exploded view of the rectangular frame of the components of the present invention;

[0021] Figure 3 is a top view of the insulating protective sleeve of the components of the present invention;

[0022] Figure 4 is a schematic structural diagram of the female buttons and male buttons of the components of the present invention;

[0023] Figure 5 Schematic diagram of the curved plate structure of the component of the present invention;

[0024] Figure 6 Schematic diagram of the bottom view of the curved plate of the component of the present invention;

[0025] Figure 7 Schematic diagram of the driving vehicle structure of the component of the present invention;

[0026] Figure 8 Schematic diagram of the L-shaped plate structure of the component of the present invention;

[0027] Figure 9 Schematic diagram of the elastic plate structure of the component of the present invention;

[0028] Figure 10 Schematic diagram of the limiting plate structure of the component of the present invention;

[0029] Figure 11 Schematic diagram of the structure of the micro-transmitter type vibration sensor of the component of the present invention;

[0030] Figure 12 Exploded view of the elastic plate of the component of the present invention.

[0031] Reference numerals in the figure: 1, elastic plate; 2, rectangular frame; 3, insulating protective sleeve; 4, fixing column; 5, first connecting ring; 6, elastic rope; 7, connecting column; 8, second connecting ring; 9, female buckle; 10, male buckle; 11, curved plate; 12, U-shaped plate; 13, driving vehicle; 14, elastic arc plate; 15, L-shaped plate; 16, temperature sensor; 17, first nut; 18, connecting threaded rod; 19, fixing plate; 20, connecting rod; 21, limiting ring; 22, second nut; 23, limiting plate; 24, micro-transmitter type vibration sensor; 25, limiting threaded rod; 26, third nut; 27, inserting plate; 28, first bolt; 29, limiting frame; 30, second bolt. Detailed implementation manner

[0032] Please refer to Figures 1-12 , the present invention provides a technical solution:

[0033] Embodiment 1:

[0034] A method for on-line monitoring of the operating state of a power transformer, comprising the following steps:

[0035] Step 1: Install a temperature detection mechanism, a vibration detection mechanism and other protection mechanisms on the surface of the transformer through an installation mechanism, and the other protection mechanisms protect the transformer terminal connection;

[0036] Step 2: The temperature detection mechanism walks and moves on the surface of the transformer to more accurately find the area with abnormal temperature on the surface of the transformer;

[0037] Step 3: The vibration detection mechanism monitors the vibration frequency of the transformer;

[0038] Step 4: Both the temperature detection mechanism and the vibration detection mechanism transmit the health status classification results to the cloud server through the wireless communication module and trigger warning signals of corresponding levels.

[0039] Embodiment 2:

[0040] A device for on-line monitoring of the operating state of a power transformer, comprising an elastic plate 1. Two rectangular frames 2 are sleeved on the outer edge of the elastic plate 1. The two rectangular frames 2 are arranged front and back. Fixed columns 4 are fixedly connected to both the left and right sides of the rectangular frame 2. First connection rings 5 are fixedly connected to the outer edges of the fixed columns 4. First blind holes are provided at one ends of the fixed columns 4 away from the rectangular frame 2. Insulating protective sleeves 3 are provided on both the left and right sides of the rectangular frame 2. Connecting columns 7 are fixedly connected to the bottom of the insulating protective sleeves 3 close to the rectangular frame 2. Second connection rings 8 are fixedly connected to the outer edges of the connecting columns 7. The adjacent first connection rings 5 and second connection rings 8 are arranged in mutual contact. Second blind holes are provided at one ends of the connecting columns 7 close to the rectangular frame 2. Elastic ropes 6 are fixedly connected in the adjacent first blind holes and second blind holes together. Moving mechanisms are provided on both the left and right sides of the elastic plate 1. The moving mechanisms include two U-shaped plates 12. The two U-shaped plates 12 are arranged left and right. The two U-shaped plates 12 are sleeved on both the left and right sides of the elastic plate 1 together. A plurality of first threaded holes are provided on both the left and right sides of the elastic plate 1. Second threaded holes are provided on the U-shaped plates 12. Second bolts 30 are threadedly connected in the adjacent first threaded holes and second threaded holes together. Curved plates 11 are fixedly connected to the bottoms of the U-shaped plates 12 away from the elastic plate 1. Slide rails are provided at the tops of the curved plates 11. Two connecting rods 20 penetrate through the slide rails. Fixed disks 19 are fixedly connected to the bottom ends of the connecting rods 20. Limit rings 21 are fixedly connected to the outer edges of the connecting rods 20 close to the tops. Driving vehicles 13 are fixedly connected to the tops of the adjacent two connecting rods 20 together. The fixed disks 19 are located at the bottoms of the curved plates 11, and the limit rings 21 are located at the tops of the curved plates 11. L-shaped plates 15 are fixedly connected to both the front and back sides of the driving vehicle 13. Through holes are provided on the L-shaped plates 15. Connecting threaded rods 18 penetrate through the through holes. Temperature sensors 16 are fixedly connected to the bottom ends of the connecting threaded rods 18. First nuts 17 are threadedly connected to the outer edges of the connecting threaded rods 18 close to the tops. Second nuts 22 are threadedly connected to the outer edges of the connecting threaded rods 18 close to the centers;

[0041] A slot is provided at the center of the bottom of the elastic plate 1. A number of vertical holes are provided at the top of the inner cavity of the slot. A number of limiting holes are provided at the center of the top of the elastic plate 1. The limiting holes and the vertical holes are arranged to communicate with each other. The diameter of the limiting holes is larger than that of the vertical holes. Two micro-transmitter type vibration sensors 24 are provided in the slot. Limiting threaded rods 25 are fixedly connected to the tops of the micro-transmitter type vibration sensors 24. The top ends of the limiting threaded rods 25 penetrate the inner cavity of the vertical holes and extend into the inner cavity of the limiting holes. A third nut 26 is threadedly connected to the outer edge of the limiting threaded rod 25 near the top end. The third nut 26 is located in the limiting hole. Through slots are provided on both the front and rear sides of the elastic plate 1. Limiting frames 29 penetrate through the through slots. One side of the limiting frame 29 is fixedly connected to one side of the elastic plate 1. An insertion plate 27 is provided in the inner cavity of the limiting frame 29. A limiting plate 23 is fixedly connected to the side of the insertion plate 27 away from the limiting frame 29. A number of third threaded holes are provided in the limiting plate 23. Three fourth threaded holes are provided on both the left and right sides of the limiting frame 29. Three fifth threaded holes are provided in the inner cavity of the insertion plate 27. First bolts 28 are provided on the side of the limiting plate 23 close to the limiting frame 29. The right ends of the first bolts 28 penetrate through the adjacent fourth threaded holes and fifth threaded holes and are threadedly connected thereto. A number of female buttons 9 and male buttons 10 are fixedly connected to the outer edge of the insulating protective sleeve 3. The adjacent male buttons 10 are located in the inner cavities of the adjacent female buttons 9. An elastic arc-shaped plate 14 is fixedly connected to the tops of two adjacent L-shaped plates 15;

[0042] The resonance frequency of the micro-transmitter type vibration sensor 24 is 1 kHz to 10 kHz, and the sensitivity ≥ 10 mV / g; an anti-electromagnetic interference shielding layer and a signal amplification module are built-in, and the original vibration signal is converted into a 4-20 mA standard current signal.

[0043] Working principle: Before the device starts working, first cut off the power supply of the transformer. Then the operator takes out the elastic plate 1, puts the elastic plate 1 on the surface of the transformer, winds both ends of the elastic plate 1 around the support frame that supports the transformer. The limit frame 29 at one end of the elastic plate 1 passes through the through slot on the elastic plate 1. Take out the insertion plate 27 and the limit plate 23, place the insertion plate 27 inside the limit frame 29, and pass the second bolt 30 through the insertion plate 27 and the limit frame 29 to install the elastic plate 1. Multiple elastic plates 1 can be installed on the same transformer, and the installation method is the same as the above operation. Then the operator picks up the insulation protection sleeve 3. The insulation protection sleeve 3 drives the connecting column 7 and the second connecting ring 8 to move. The connecting column 7 drives the elastic rope 6 to stretch. Wrap the insulation protection sleeve 3 around the terminal of the transformer. The insulation protection sleeve 3 is installed at the terminal of the transformer through the female buckle 9 and the male buckle 10. The micro-transmitter type vibration sensor 24 is attached to the surface of the transformer. The micro-transmitter type vibration sensor 24 collects the vibration signal of the transformer in real time. The micro-transmitter type vibration sensor 24 is detachable. By rotating the third nut 26, the micro-transmitter type vibration sensor 24 can be disassembled. When it is necessary to monitor the temperature of the transformer, remotely control the driving vehicle 13. The driving vehicle 13 moves on the surface of the transformer. The driving vehicle 13 drives the connecting rod 20, the fixed disk 19 and the limit ring 21 to move. The connecting rod 20, the fixed disk 19 and the limit ring 21 cooperate with the curved plate 11 to limit the movement track of the driving vehicle 13. The driving vehicle 13 moves in a curve. During the movement of the driving vehicle 13, it drives the L-shaped plate 15 and the elastic arc plate 14 to move. The L-shaped plate 15 drives the temperature sensor 16 to move through the connecting threaded rod 18, the first nut 17 and the second nut 22. The temperature sensor 16 is located on the surface of the transformer. There is a gap between the temperature sensor 16 and the transformer. When the temperature sensor 16 moves in a curve, it can expand the monitoring range of the temperature sensor 16. The circuit of the temperature sensor 16 can be wound around the surface of the elastic arc plate 14. Both the temperature sensor 16 and the micro-transmitter type vibration sensor 24 transmit the health status classification results to the cloud server through the wireless communication module and trigger the warning signals of corresponding levels. In this device, the number of insulation protection sleeves 3, temperature sensors 16 and micro-transmitter type vibration sensors 24 can be increased or decreased, and the positions of the insulation protection sleeves 3, temperature sensors 16 and micro-transmitter type vibration sensors 24 can be changed, which expands the applicable range of this device. The temperature sensor 16 and the micro-transmitter type vibration sensor 24 are both existing technologies, and their working principles are well-known and known to those skilled in the art.

Claims

1. A method for online monitoring of the operating status of a power transformer, comprising the following steps: Step 1: Install the temperature detection mechanism, vibration detection mechanism and other protection mechanisms on the surface of the transformer through the installation mechanism, and other protection mechanisms protect the transformer terminals; Step 2: The temperature detection mechanism moves on the surface of the transformer to more accurately find the area with abnormal temperature on the surface of the transformer; Step 3: The vibration detection mechanism monitors the vibration frequency of the transformer; Step 4: Both the temperature detection mechanism and the vibration detection mechanism transmit the health status classification results to the cloud server through the wireless communication module, and trigger the corresponding level of warning signal.

2. A device for online monitoring of the operating status of a power transformer, comprising an elastic plate (1), characterized in that: Two rectangular frames (2) are sleeved on the outer edge of the elastic plate (1), and the two rectangular frames (2) are arranged front and back. The left and right sides of the rectangular frame (2) are fixedly connected with a fixing column (4), and the outer edges of the fixing column (4) are fixedly connected with a first connecting ring (5). The end of the fixing column (4) away from the rectangular frame (2) is provided with a first blind hole. The left and right sides of the rectangular frame (2) are provided with an insulating protective sleeve (3), and the bottom of the insulating protective sleeve (3) close to the rectangular frame (2) is fixedly connected with a connecting column (7), and the outer edges of the connecting column (7) are fixedly connected with a second connecting ring (8). The adjacent first connecting ring (5) and the second connecting ring (8) are arranged to fit each other. The end of the connecting column (7) close to the rectangular frame (2) is provided with a second blind hole, and the adjacent first blind hole and the second blind hole are fixedly connected with an elastic rope (6). The left and right sides of the elastic plate (1) are provided with a moving mechanism.

3. The device for online monitoring of the operating status of a power transformer according to claim 2, characterized in that: The moving mechanism comprises two U-shaped plates (12), the two U-shaped plates (12) are arranged on the left and right sides, the two U-shaped plates (12) are jointly sleeved on the left and right sides of the elastic plate (1), the left and right sides of the elastic plate (1) are each provided with a plurality of first threaded holes, the U-shaped plates (12) are each provided with a second threaded hole, the adjacent first threaded holes and second threaded holes are jointly threadedly connected with a second bolt (30), the U-shaped plates (12) are both fixedly connected with a curved plate (11) near the bottom on one side away from the elastic plate (1), a slide rail is provided on the top of the curved plate (11), two connecting rods (20) are respectively penetrated in the slide rail, the bottom ends of the connecting rods (20) are each fixedly connected with a fixed plate (19), the outer sides of the connecting rods (20) are A limiting ring (21) is fixedly connected to the edge near the top, the top ends of the two adjacent connecting rods (20) are commonly fixedly connected to a driving vehicle (13), the fixing plate (19) is located at the bottom of the curved plate (11), the limiting ring (21) is located at the top of the curved plate (11), the front and rear sides of the driving vehicle (13) are fixedly connected to L-shaped plates (15), the L-shaped plates (15) are each provided with a through hole, a connecting threaded rod (18) is passed through the through hole, a temperature sensor (16) is fixedly connected to the bottom end of the connecting threaded rod (18), a first nut (17) is threadedly connected to the outer edge of the connecting threaded rod (18) near the top, and a second nut (22) is threadedly connected to the outer edge of the connecting threaded rod (18) near the center.

4. The device for online monitoring of the operating status of a power transformer according to claim 2, characterized in that: A slot is provided at the center of the bottom of the elastic plate (1), a plurality of vertical holes are provided at the top of the inner cavity of the slot, a plurality of limiting holes are provided at the center of the top of the elastic plate (1), the limiting holes and the vertical holes are mutually interpenetrating, the diameter of the limiting holes is larger than the diameter of the vertical holes, two miniature transmitter type vibration sensors (24) are provided in the slot, the tops of the miniature transmitter type vibration sensors (24) are fixedly connected to limiting threaded rods (25), the tops of the limiting threaded rods (25) pass through the inner cavity of the vertical holes and extend to the inner cavity of the limiting holes, the outer edge of the limiting threaded rod (25) is threadedly connected to a third nut (26) near the top, and the third nut (26) is located in the limiting hole.

5. The device for online monitoring of the operating status of a power transformer according to claim 2, characterized in that: The elastic plate (1) is provided with through grooves on both the front and rear sides, and a limit frame (29) is provided in the through groove. One side of the limit frame (29) is fixedly connected to one side of the elastic plate (1). An insert plate (27) is provided in the inner cavity of the limit frame (29). The side of the insert plate (27) away from the limit frame (29) is fixedly connected to the limit plate (23). A plurality of third threaded holes are provided on the limit plate (23). Three fourth threaded holes are provided on the left and right sides of the limit frame (29). Three fifth threaded holes are provided in the inner cavity of the insert plate (27). A first bolt (28) is provided on the side of the limit plate (23) close to the limit frame (29). The right end of the first bolt (28) passes through the adjacent fourth threaded hole and the fifth threaded hole and is threadedly connected thereto.

6. The device for online monitoring of the operating status of a power transformer according to claim 2, characterized in that: A plurality of female buckles (9) and sub-buckles (10) are fixedly connected to the outer edges of the insulating protective sleeve (3), and adjacent sub-buckles (10) are located in the inner cavities of adjacent female buckles (9).

7. The device for online monitoring of the operating status of a power transformer according to claim 3, characterized in that: The tops of two adjacent L-shaped plates (15) are commonly and fixedly connected with an elastic arc-shaped plate (14).

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