Transformer operating status online monitoring device and monitoring method

Abstract

The present application relates to the technical field of online monitoring of transformer operating status, and discloses an online monitoring device for transformer operating status, including a transformer, a pipeline fixedly connected inside the transformer, a detection box fixedly connected to the outer surface of the pipeline, a first electric valve fixedly connected inside the pipeline, a suction fan fixedly connected to the upper part of the first electric valve, a composite chromatographic column fixedly connected to the end of the suction fan away from the pipeline, a main controller stores the results transmitted by an oil chromatographic online monitor and a current online monitor, and compares the two results at the same time. When the diagnosis results are all fault-free, the main controller transmits the results to a remote terminal through an internal wireless network connector to facilitate staff to view the detection data. When the diagnosis results are all faults or one of the results is a fault, the main controller urgently reports the fault information to the remote terminal, and provides accurate detection results of the transformer through gas monitoring and grounding current monitoring.

Description

Technical Field

[0001] The present application relates to the technical field of online monitoring of transformer operating status, and in particular to an online monitoring device and a monitoring method for transformer operating status. Background Art

[0002] The distribution transformer is one of the important electrical equipment in the power system. Its status directly determines the power quality and operation stability in the power grid. After long-term operation, unattended rural power distribution transformers in remote mountainous areas may have hidden dangers such as abnormal oil temperature, oil level, and operating parameters, which threaten the stable operation of the power grid. In order to reduce the safety problems and economic losses caused by transformer failures, it is necessary to monitor the status of the distribution transformer and conduct fault warning. By monitoring the transformer power parameters, oil temperature, oil level, ambient temperature and humidity, etc., a comprehensive analysis of the transformer operation status and environmental status is achieved. In addition, according to the working environment, installation requirements, maintenance characteristics, etc. of the transformer operation status online monitoring system, a networking solution for each monitoring module and terminal is established to realize the data interaction between the transformer status data and the control terminal through wireless communication. In addition, by comparing and analyzing the real-time status parameters with the historical status parameters, the development trend and law of the parameters can be judged, the potential fault points can be predicted, and the occurrence of accidents can be avoided.

[0003] The existing transformer online monitoring function is relatively simple. When a problem occurs inside the detection device, the transformer also has a problem, causing the monitoring device to be unable to transmit the transformer fault information in time, resulting in transformer damage and circuit problems. Summary of the invention

[0004] In order to solve the above-mentioned problems, the present application provides an online monitoring device and a monitoring method for transformer operation status.

[0005] The transformer operating status online monitoring device and monitoring method provided in this application adopt the following technical solutions:

[0006] The online monitoring device for transformer operation status comprises a transformer, wherein a pipeline is fixedly connected inside the transformer, a detection box is fixedly connected to the outer surface of the pipeline, a first electric valve is fixedly connected inside the pipeline, a suction fan is fixedly connected to the upper part of the first electric valve, a composite chromatographic column is fixedly connected to the end of the suction fan away from the pipeline, a chromatographic box is fixedly connected to the outer surface of the composite chromatographic column, a gas box is fixedly connected to the end of the composite chromatographic column away from the pipeline, a gas detector is fixedly installed inside the gas box, an exhaust pipe is fixedly connected inside the gas box, a second electric valve is fixedly connected inside the exhaust pipe, an end of the pipeline close to the suction fan is fixedly connected to the intake pipe, a third electric valve is fixedly connected to the intake pipe, and an oil chromatogram online monitor is fixedly connected inside the detection box.

[0007] By adopting the above technical solution, the main controller controls the suction fan to start, and the suction fan starts to suck the oil and gas on the inner wall of the transformer through the pipeline and send it to the inside of the composite chromatographic column, so that the composite chromatographic column can effectively separate six fault gases, namely H2, CO, CH4, C2H6, C2H4, and C2H2. The separated gases then enter the inside of the gas box, and the gas detector detects the separated gases. The detection results are sent to the inside of the oil chromatogram online monitor, and then the oil chromatogram online monitor compares and analyzes the information with the big data through the wireless network, and then makes a fault diagnosis.

[0008] Preferably, a current online monitor and a master controller are installed inside the detection box, a motor is fixedly connected inside the detection box, a lead screw is fixedly connected to the output end of the motor, a threaded plate is spirally connected to the outer surface of the lead screw, and the outer surface of the threaded plate is slidably connected to the inside of the detection box, a telescopic rod is fixedly connected to the top of the threaded plate, and the outer surface of the telescopic rod is fixedly connected to the outer surface of the detection box, a protection box is fixedly connected to the bottom of the telescopic rod, and a current sensor is installed inside the protection box;

[0009] A grounding wire is fixedly connected to the bottom of the transformer, and a grounding metal rod is fixedly connected to one end of the grounding wire away from the transformer, and the grounding metal rod is inserted into the ground.

[0010] By adopting the above technical solution, the main controller controls the motor to drive the screw to rotate, and the rotation of the screw drives the telescopic rod and the protection box to move downward through the threaded plate. The downward movement of the protection box drives the baffle to be blocked by the limit plate, so that the current sensor is separated from the space formed by the baffle and the protection box, and then the connecting rod is in contact with the ground, and the transformer conducts electricity to the ground through the grounding wire and the grounding metal rod, and then the ground current information is detected by the connecting rod and transmitted to the inside of the current online monitor, and then the current online monitor compares and analyzes the information with the big data through the wireless network, and then makes a fault diagnosis and transmits the detection result to the main controller.

[0011] Preferably, a return spring is fixedly connected to the inner wall of the protection box, a baffle is fixedly connected to the bottom of the return spring, and the outer surface of the baffle is slidably connected to the inside of the protection box, a connecting rod is fixedly connected to the inner wall of the protection box, a current sensor is fixedly connected to the bottom of the connecting rod, a limit plate is provided at the bottom of one end of the baffle close to the detection box, and the outer surface of the limit plate is fixedly connected to the outer surface of the detection box.

[0012] By adopting the above technical solution, the current sensor is protected by the protection box to prevent malicious damage by others.

[0013] Preferably, a camera is fixedly connected to the top of the detection box, and the camera is close to a side of the current sensor, and an alarm is installed on the outer surface of the detection box.

[0014] By adopting the above technical solution, the camera monitors the area where the grounded metal pole is inserted into the ground all day long. When someone approaches the grounded metal pole, the alarm sounds to remind others that this place is dangerous and prevent others from accidentally touching it.

[0015] Preferably, a thermostat is installed inside the chromatographic box, and the gas detector adopts integrated sensing technology, and the sensitive element and the control circuit are integrated on a ceramic silicon chip.

[0016] By adopting the above technical solution, the fault gas inspection chamber designed corresponding to the gas box has a minimum dead volume, which can greatly improve the detection sensitivity.

[0017] The online monitoring method of transformer operation status comprises the following steps:

[0018] In the first step, the main controller controls the suction fan to start, and the suction fan starts to suck the oil and gas on the inner wall of the transformer through the pipeline and send it to the inside of the composite chromatographic column. Then, under the action of the thermostat, the temperature of the composite chromatographic column is kept at a constant temperature environment of ℃-℃, so that the composite chromatographic column can effectively separate six fault gases, namely H, CO, CH, CH, CH, CH, and CH, and then the separated gases enter the inside of the gas box;

[0019] In the second step, the gas detector detects the separated gas, and the detection result is sent to the inside of the oil chromatogram online monitor, and then the oil chromatogram online monitor compares and analyzes the information with the big data through the wireless network, and then makes a fault diagnosis and transmits the detection result to the main controller;

[0020] In the third step, the main controller controls the motor to drive the screw to rotate, and the screw rotates through the threaded plate to drive the telescopic rod and the protection box to move downward. The protection box moves downward and drives the baffle to be blocked by the limit plate, so that the current sensor is separated from the space formed by the baffle and the protection box, and then the connecting rod contacts the ground;

[0021] Step 4: Insert the grounding metal rod into the ground, close to one side of the connecting rod;

[0022] Step 5: The transformer conducts electricity to the ground through the grounding wire and the grounding metal rod, and then the ground current information is detected by the connecting rod and transmitted to the inside of the current online monitor. Then the current online monitor compares and analyzes the information with the big data through the wireless network, and then makes a fault diagnosis and transmits the detection results to the main controller;

[0023] Step 6: The main controller stores the results transmitted by the oil chromatography online monitor and the current online monitor, and compares the two results. When the diagnosis results are all fault-free, the main controller transmits them to the remote terminal through the internal wireless network connector to facilitate the staff to view the test data. When the diagnosis results are all faults or one of the results is a fault, the main controller urgently reports the fault information to the remote terminal.

[0024] By adopting the above technical solutions, gas monitoring and ground current monitoring can provide accurate detection results for the transformer.

[0025] In summary, this application includes the following beneficial technical effects:

[0026] 1. The master controller stores the results transmitted by the oil chromatogram online monitor and the current online monitor, and compares the two results. When the diagnosis results are all fault-free, the master controller transmits them to the remote terminal through the internal wireless network connector, so that the staff can view the test data. When the diagnosis results are all faults or one of them is a fault, the master controller urgently reports the fault information to the remote terminal, and provides accurate test results of the transformer through gas monitoring and grounding current monitoring;

[0027] 2. The camera monitors the area where the grounding metal rod is inserted into the ground all day long. When someone approaches the grounding metal rod, the camera transmits the video to the inside of the main controller, and then the main controller identifies the person. When someone approaches, the gas box control alarm sounds an alarm and voice prompts to remind others that this place is dangerous and prevent others from accidentally touching it. The main controller transmits the information captured by the camera to the remote terminal to facilitate the staff to check the condition of the transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the front internal structure of an embodiment of the application.

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the transformer of the embodiment of the application.

[0030] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the detection box of the application embodiment.

[0031] Figure 4 It is an application example Figure 3 Enlarged structural diagram at A in the middle.

[0032] Explanation of the accompanying drawings: 1. Transformer; 2. Pipe; 3. First electric valve; 4. Suction fan; 5. Composite chromatographic column; 6. Chromatographic box; 7. Gas box; 8. Gas detector; 9. Exhaust pipe; 10. Second electric valve; 11. Suction pipe; 12. Third electric valve; 13. Dust net; 14. Detection box; 15. Oil chromatographic online monitor; 16. Current online monitor; 17. Master controller; 18. Motor; 19. Screw; 20. Threaded plate; 21. Telescopic rod; 22. Protective box; 23. Reset spring; 24. Baffle; 25. Connecting rod; 26. Current sensor; 27. Limit plate; 28. Grounding wire; 29. ​​Grounding metal rod; 30. Camera. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-4 This application is described in further detail.

[0034] The embodiment of the present application discloses an online monitoring device and a monitoring method for transformer operation status. Figure 1 , a transformer operation status online monitoring device comprises a transformer 1, a pipeline 2 is fixedly connected inside the transformer 1, a detection box 14 is fixedly connected to the outer surface of the pipeline 2, a first electric valve 3 is fixedly connected inside the pipeline 2, a suction fan 4 is fixedly connected to the upper part of the first electric valve 3, a composite chromatographic column 5 is fixedly connected to the end of the suction fan 4 away from the pipeline 2, a chromatographic box 6 is fixedly connected to the outer surface of the composite chromatographic column 5, a gas box 7 is fixedly connected to the end of the composite chromatographic column 5 away from the pipeline 2, a gas detector 8 is fixedly installed inside the gas box 7, an exhaust pipe 9 is fixedly connected inside the gas box 7, a second electric valve 10 is fixedly connected inside the exhaust pipe 9, an end of the pipeline 2 close to the suction fan 4 is fixedly connected to an air intake pipe 11, a third electric valve 12 is fixedly connected inside the air intake pipe 11, a dustproof net 13 is fixedly connected to the top of the air intake pipe 11, and an oil chromatographic online monitor 15 is fixedly connected inside the detection box 14;

[0035] like Figure 1-4As shown, the interior of the detection box 14 is equipped with a current online monitor 16 and a master controller 17, and the master controller 17 is convenient for controlling the current online monitor 16, the oil chromatogram online monitor 15, the first electric valve 3, the second electric valve 10, the third electric valve 12, the motor 18, and the camera 30. The interior of the detection box 14 is fixedly connected with the motor 18, and the output end of the motor 18 is fixedly connected with a screw rod 19, and the outer surface of the screw rod 19 is spirally connected with a threaded plate 20, and the outer surface of the threaded plate 20 is slidably connected to the interior of the detection box 14, the top of the threaded plate 20 is fixedly connected with a telescopic rod 21, and the outer surface of the telescopic rod 21 is fixedly connected to the outer surface of the detection box 14, the bottom of the telescopic rod 21 is fixedly connected with a protection box 22, and the interior of the protection box 22 is equipped with a current sensor 26, and the bottom of the transformer 1 is fixedly connected with A grounding wire 28 is fixedly connected to one end of the grounding wire 28 away from the transformer 1, and the grounding metal rod 29 is inserted into the ground. The main controller 17 controls the motor 18 to drive the screw rod 19 to rotate. The screw rod 19 rotates through the threaded plate 20 to drive the telescopic rod 21 and the protection box 22 to move downward. The protection box 22 moves downward to drive the baffle 24 to be blocked by the limit plate 27, so that the current sensor 26 is separated from the space formed by the baffle 24 and the protection box 22. Then the connecting rod 25 contacts the ground, and the transformer 1 conducts electricity to the ground through the grounding wire 28 and the grounding metal rod 29. Then the ground current information is detected by the connecting rod 25 and transmitted to the inside of the current online monitor 16. Then the current online monitor 16 compares and analyzes the information with the big data through the wireless network, and then makes a fault diagnosis and transmits the detection result to the main controller 17.

[0036] like Figure 1-3 As shown, the inner wall of the protection box 22 is fixedly connected with a reset spring 23, the bottom of the reset spring 23 is fixedly connected with a baffle 24, and the outer surface of the baffle 24 is slidably connected to the inside of the protection box 22, the inner wall of the protection box 22 is fixedly connected with a connecting rod 25, the bottom of the connecting rod 25 is fixedly connected with a current sensor 26, and a limit plate 27 is provided at the bottom of one end of the baffle 24 close to the detection box 14, and the outer surface of the limit plate 27 is fixedly connected to the outer surface of the detection box 14, and the current sensor 26 is protected by the protection box 22 to prevent malicious damage by others.

[0037] like Figure 1-3As shown, a camera 30 is fixedly connected to the top of the detection box 14, and the camera 30 is close to one side of the current sensor 26. An alarm is installed on the outer surface of the detection box 14. The camera 30 monitors the area where the grounding metal rod 29 is inserted into the ground all day long. When someone approaches the grounding metal rod 29, the camera 30 transmits the video to the inside of the main controller 17, and then the main controller 17 identifies the person. When a person approaches, the gas box 7 controls the alarm to sound an alarm and voice prompt to remind others that this place is dangerous and prevent others from accidentally touching it. The main controller 17 transmits the information captured by the camera 30 to the remote terminal, which is convenient for the staff to check the condition of the transformer 1.

[0038] like Figure 1-4 As shown, a thermostat is installed inside the chromatographic box 6, the gas detector 8 adopts integrated sensing technology, and the sensitive element and control circuit are integrated on a ceramic silicon chip. The gas box 7 is designed to correspond to the fault gas detection chamber, which has a minimum dead volume and can greatly improve the detection sensitivity.

[0039] The implementation principle of the transformer operation status online monitoring device and the monitoring method thereof in the embodiment of the present application is as follows: the main controller 17 controls the suction fan 4 to start, and the suction fan 4 starts to suck the oil and gas on the inner wall of the transformer 1 through the pipeline 2 and send it to the inside of the composite chromatographic column 5, and then the temperature of the composite chromatographic column 5 is kept at a constant temperature environment of 20°C-30°C under the action of the thermostat, so that the composite chromatographic column 5 effectively separates six fault gases such as H2, CO, CH4, C2H6, C2H4, and C2H2, and then the separated gas enters the inside of the gas box 7, and the gas detector 8 detects the separated gas, and the detection result is sent to the inside of the oil chromatographic online monitor 15, and then the oil chromatographic online monitor 15 compares and analyzes the information with the big data through the wireless network, and then makes a fault diagnosis and transmits the detection result to the main controller 17, and the main controller 17 controls the motor 18 to drive the screw rod 19 to rotate, and the rotation of the screw rod 19 drives the telescopic rod 21 and the protective box 22 to move downward through the threaded plate 20, and the downward movement of the protective box 22 drives the baffle 24 to be blocked by the limit plate 27 The current sensor 26 is separated from the space formed by the baffle 24 and the protection box 22, and then the connecting rod 25 is in contact with the ground, and the grounding metal rod 29 is inserted into the ground and close to one side of the connecting rod 25. The transformer 1 is electrically conductive to the ground through the grounding wire 28 and the grounding metal rod 29, and then the ground current information is detected by the connecting rod 25 and transmitted to the inside of the current online monitor 16. Then the current online monitor 16 compares and analyzes the information with the big data through the wireless network, and then makes a fault diagnosis, and transmits the detection result to the main controller 17. The main controller 17 stores the results transmitted by the oil chromatography online monitor 15 and the current online monitor 16, and compares the two results at the same time. When the diagnosis results are all fault-free, the main controller 17 transmits them to the remote terminal through the internal wireless network connector, so that the staff can view the detection data. When the diagnosis results are all faults or one of the results is a fault, the main controller 17 urgently reports the fault information to the remote terminal, and provides accurate detection results of the transformer 1 through gas monitoring and ground current monitoring.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transformer operating status online monitoring device, comprising a transformer (1), characterized in that: The inside of the transformer (1) is fixedly connected to a pipeline (2), the outer surface of the pipeline (2) is fixedly connected to a detection box (14), the inside of the pipeline (2) is fixedly connected to a first electric valve (3), the upper part of the first electric valve (3) is fixedly connected to a suction fan (4), the end of the suction fan (4) away from the pipeline (2) is fixedly connected to a composite chromatographic column (5), the outer surface of the composite chromatographic column (5) is fixedly connected to a chromatographic box (6), and the end of the composite chromatographic column (5) away from the pipeline (2) is fixedly connected to a A gas box (7) is connected, a gas detector (8) is fixedly installed inside the gas box (7), an exhaust pipe (9) is fixedly connected inside the gas box (7), a second electric valve (10) is fixedly connected inside the exhaust pipe (9), an end of the pipeline (2) close to the suction fan (4) is fixedly connected to an air suction pipe (11), a third electric valve (12) is fixedly connected inside the air suction pipe (11), and an oil chromatogram online monitor (15) is fixedly connected inside the detection box (14); The detection box (14) is internally installed with a current online monitor (16) and a master controller (17); the detection box (14) is internally fixedly connected with a motor (18); the output end of the motor (18) is fixedly connected with a screw rod (19); the outer surface of the screw rod (19) is spirally connected with a threaded plate (20), and the outer surface of the threaded plate (20) is slidably connected to the inside of the detection box (14); the top of the threaded plate (20) is fixedly connected with a telescopic rod (21), and the outer surface of the telescopic rod (21) is fixedly connected to the outer surface of the detection box (14); the bottom of the telescopic rod (21) is fixedly connected with a protection box (22), and the protection box (22) is internally installed with a current sensor (26); A grounding wire (28) is fixedly connected to the bottom of the transformer (1), and a grounding metal rod (29) is fixedly connected to one end of the grounding wire (28) away from the transformer (1), and the grounding metal rod (29) is inserted into the ground; The inner wall of the protection box (22) is fixedly connected to a return spring (23), the bottom of the return spring (23) is fixedly connected to a baffle (24), and the outer surface of the baffle (24) is slidably connected to the inside of the protection box (22), the inner wall of the protection box (22) is fixedly connected to a connecting rod (25), the bottom of the connecting rod (25) is fixedly connected to a current sensor (26), and a limit plate (27) is provided at the bottom of one end of the baffle (24) close to the detection box (14), and the outer surface of the limit plate (27) is fixedly connected to the outer surface of the detection box (14).

2. The transformer operating status online monitoring device according to claim 1 is characterized in that: A camera (30) is fixedly connected to the top of the detection box (14), and the camera (30) is close to one side of the current sensor (26).

3. The transformer operating status online monitoring device according to claim 1 is characterized in that: A thermostat is installed inside the chromatographic box (6), and the gas detector (8) adopts integrated sensing technology, with the sensitive element and the control circuit integrated on a ceramic silicon chip.

4. The method for online monitoring of transformer operating status according to any one of claims 1 to 3, characterized in that: The following steps are involved: In the first step, the main controller (17) controls the suction fan (4) to start, and the suction fan (4) starts to suck the oil and gas on the inner wall of the transformer (1) through the pipeline (2) and sends it to the inside of the composite chromatographic column (5), and then the temperature of the composite chromatographic column (5) is kept at a constant temperature environment of 20° C.-30° C. under the action of the thermostat, so that the composite chromatographic column (5) effectively separates six fault gases, namely H2, CO, CH4, C2H6, C2H4, and C2H2, and then the separated gases enter the inside of the gas box (7); In the second step, the gas detector (8) detects the separated gas, and the detection result is sent to the inside of the oil chromatogram online monitor (15). Then the oil chromatogram online monitor (15) compares and analyzes the information with the big data through the wireless network, and then makes a fault diagnosis and transmits the detection result to the main controller (17); In the third step, the main controller (17) controls the motor (18) to drive the screw rod (19) to rotate, and the screw rod (19) rotates through the threaded plate (20) to drive the telescopic rod (21) and the protection box (22) to move downward, and the protection box (22) moves downward to drive the baffle (24) to be blocked by the limit plate (27), so that the current sensor (26) is separated from the space formed by the baffle (24) and the protection box (22), and then the connecting rod (25) contacts the ground; Step 4: insert the grounding metal rod (29) into the ground, close to one side of the connecting rod (25); Step 5: The transformer (1) conducts electricity to the ground through the grounding wire (28) and the grounding metal rod (29), and then detects the ground current information through the connecting rod (25) and transmits it to the inside of the current online monitor (16). Then the current online monitor (16) compares and analyzes the information with the big data through the wireless network, and then makes a fault diagnosis and transmits the detection result to the main controller (17). In the sixth step, the main controller (17) stores the results transmitted by the oil chromatogram online monitor (15) and the current online monitor (16), and compares the two results. When the diagnosis results are all fault-free, the main controller (17) transmits the results to the remote terminal through the internal wireless network connector, so that the staff can view the test data. When the diagnosis results are all faults or one of the results is a fault, the main controller (17) sends an emergency fault message to the remote terminal.

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