Distribution transformer relay protection system based on online monitoring data
By setting a combination of trigger mechanism and multiple sets of vibration sensors in the transformer, the problems of redundant data and system burden in the prior art are solved, and efficient online fault diagnosis and relay protection are achieved in the transformer, ensuring monitoring accuracy and System performance.
Patent Information
- Application Number
- CN202411368102.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-01-03
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing transformer vibration monitoring system generates a large amount of redundant data during normal operation, affecting the monitoring accuracy and increasing the system burden, making it difficult to effectively conduct online fault diagnosis and relay protection.
A distribution transformer relay protection system based on online monitoring data was designed. By setting a trigger mechanism, the transformer does not operate when the transformer vibrates normally. It only starts the monitoring platform for data acquisition and analysis when the trigger signal is received, and uses multiple sets of vibrations. The combination of sensor and trigger mechanism reduces the generation of redundant data.
It effectively reduces the system burden and the generation of redundant data, improves monitoring accuracy and fault diagnosis accuracy, and ensures that relay protection processing is started in time when a fault occurs.
Smart Images
Figure CN119253536A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of transformer relay protection, and in particular relates to a distribution transformer relay protection system based on online monitoring data. Background Art
[0002] During normal operation, the vibration of the transformer body is mainly caused by the vibration of the iron core and winding. The iron core vibration is transmitted to the oil tank wall through fasteners and transformer oil, and the winding vibration is transmitted to the oil tank wall through transformer oil and iron core. Therefore, the vibration signal of the transformer oil tank wall is closely related to the changes in the internal structure of the transformer. Therefore, the condition of the internal iron core and winding can be determined by detecting the vibration of the transformer oil tank wall. When the iron core and winding fail, the corresponding vibration of the transformer oil tank wall will also change accordingly. The winding and iron core can be monitored online and fault diagnosis can be carried out by monitoring the abnormal vibration signal of the oil tank wall, and the relay protection can be started in time when a fault occurs, effectively reducing the fault loss.
[0003] Among them, in the prior art, the vibration monitoring of the transformer is mainly achieved by using sensors installed on the transformer. By collecting real-time monitoring data from the sensor and comparing and analyzing it, it is determined whether the vibration amplitude of the transformer is reasonable and whether there is any abnormality. In this process, since the transformer vibration is normal at most times, the sensor keeps collecting data while the monitoring platform keeps analyzing and processing, which will generate a large amount of redundant data, which will affect the monitoring and judgment accuracy and cause a heavy burden on the system.
[0004] Therefore, in order to solve the above problems, it is necessary to develop a distribution transformer relay protection system based on online monitoring data. Summary of the invention
[0005] The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a distribution transformer relay protection system based on online monitoring data. By providing a trigger mechanism, when the transformer vibrates normally, the trigger mechanism will not act, and the monitoring platform does not need to start working. In this process, it is only necessary to determine whether a trigger signal is received, thereby effectively reducing the workload. When a trigger signal is received, the monitoring sensor and the monitoring platform can be started to collect and monitor real-time data, and relay protection control processing can be started in the event of a fault. While ensuring the monitoring accuracy, the generation of redundant data is reduced, thereby reducing the system burden.
[0006] The object of the present invention is achieved as follows: A distribution transformer relay protection system based on online monitoring data includes a vibration monitoring mechanism connected to a transformer box, a trigger mechanism arranged on the transformer box for triggering the vibration monitoring mechanism, and a monitoring platform connected to the vibration monitoring mechanism and the trigger mechanism; Wherein, the vibration monitoring mechanism comprises a plurality of groups of vibration sensors arranged at a plurality of monitoring points on the transformer box; The trigger mechanism comprises a shell fixedly mounted on the transformer box, a vibrator is arranged inside the shell, the vibrator is suspended in the middle position inside the shell by an elastic member, and resistance strain gauges are respectively arranged above and below the vibrator inside the shell. When the transformer box vibrates, the vibrator moves up and down with the vibration, and the trigger function is realized when the up and down vibration amplitude of the vibrator is such that it can contact with the resistance strain gauge to cause deformation; The monitoring platform includes a general processor module, which is connected to a trigger mechanism and a vibration monitoring mechanism, and starts the vibration monitoring mechanism when the trigger mechanism sends a trigger signal; the general processor module is connected to a data acquisition module, and the data acquisition module is connected to the vibration monitoring mechanism to obtain real-time monitoring data of the vibration monitoring mechanism; the general processor module is also connected to a data analysis module and a data storage module, the data analysis module is used to analyze and process the real-time monitoring data of the vibration monitoring mechanism, determine whether the monitoring data reaches a set alarm or fault threshold and obtain a result, the data storage module marks and stores the real-time monitoring data, the general processor module is also connected to a relay protection module and an alarm module, the relay protection module is used to perform relay protection control processing on the transformer based on the analysis and processing results, and issue an alarm through the alarm module, and the general processor module is also connected to a wireless communication module for communication with the background.
[0007] Furthermore, the selection of multiple monitoring points on the transformer box for setting multiple groups of vibration sensors includes the upper monitoring point on the center line of the high-voltage side, the top monitoring point on the center line of the low-voltage side, and the bottom monitoring point on the center line of the low-voltage side for measuring the lateral vibration signal of the transformer box, as well as the center monitoring point on the top of the box for measuring the longitudinal vibration signal of the transformer box, and the top monitoring points on the center lines of both wings of the box.
[0008] Furthermore, the vibration sensor adopts a piezoelectric acceleration sensor.
[0009] Furthermore, the trigger mechanism is arranged at the middle position of the top of the transformer box.
[0010] Furthermore, the vibrator adopts a spherical structure.
[0011] Furthermore, the elastic member is an elastic plate horizontally arranged on both sides of the vibrator, one end of the elastic plate is fixedly connected to the inner wall of the shell, and the other end is connected to the vibrator.
[0012] Furthermore, the elastic member adopts a telescopic spring, and support plates are respectively arranged on both sides of the vibrator. The top end or the bottom end or the top and the top end of the support plate are fixedly connected to the vertically arranged telescopic spring, and the other end of the telescopic spring is fixedly connected to the inner wall of the shell.
[0013] Furthermore, mounting plates are respectively connected to both sides of the top of the shell, and through holes are provided on the mounting plates for the screw to pass through. The bottom end of the screw is fixedly connected to the transformer box. A clamping nut is provided on the screw above the mounting plate. The clamping nut clamps the shell to the transformer box, and the bottom of the shell is bonded and fixed to the transformer box.
[0014] Due to the adoption of the above technical scheme, the beneficial effects of the present invention are as follows: by providing a trigger mechanism, the generation of redundant data can be reduced. When the transformer vibrates normally, the vibration amplitude of the spherical vibrator is small and does not contact the resistance strain gauge. The resistance strain gauge will not generate a trigger signal, the trigger mechanism will not act, and the monitoring platform does not need to start working. In this process, it only needs to determine whether the trigger signal is received, thereby effectively reducing the workload; when the transformer vibrates abnormally, the vibration amplitude of the spherical vibrator is large. During the vibration process, the vibrator contacts the resistance strain gauge and causes it to deform, thereby sending out a trigger signal. When the trigger signal is received, the monitoring platform can start the monitoring sensor to collect and monitor real-time data, and start the relay protection control processing in the event of a fault. While ensuring the monitoring accuracy, the generation of redundant data is reduced, thereby reducing the system burden. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a principle block diagram of the present invention.
[0016] Figure 2 It is a structural schematic diagram of embodiment 1 of the trigger mechanism in the present invention.
[0017] Figure 3 It is a structural schematic diagram of embodiment 2 of the trigger mechanism in the present invention.
[0018] In the figure: 1. vibration monitoring mechanism 2. triggering mechanism 3. monitoring platform; 11. Vibration sensor; 21, housing 22, vibrator 23, elastic member 24, resistance strain gauge; 21a, mounting plate 21b, screw rod 21c, compression nut; 23a, elastic plate 23b, support plate 23c, telescopic spring; 31. General processor module 32. Data acquisition module 33. Data analysis module 34. Data storage module 35. Relay protection module 36. Alarm module 37. Wireless communication module. DETAILED DESCRIPTION
[0019] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.
[0020] like Figure 1 , Figure 2 , Figure 3 As shown, a distribution transformer relay protection system based on online monitoring data includes a vibration monitoring mechanism 1 connected to the transformer box, a triggering mechanism 2 arranged on the transformer box for triggering the vibration monitoring mechanism 1, and a monitoring platform 3 connected to the vibration monitoring mechanism 1 and the triggering mechanism 2.
[0021] Among them, the vibration monitoring mechanism 1 includes multiple groups of vibration sensors 11 arranged at multiple monitoring points on the transformer box. Preferably, the vibration sensor 11 adopts a piezoelectric acceleration sensor; specifically, the selection of multiple monitoring points on the transformer box for setting multiple groups of vibration sensors 11 includes the upper monitoring point of the high-voltage side center line, the top monitoring point of the low-voltage side center line and the bottom monitoring point of the low-voltage side center line for measuring the lateral vibration signal of the transformer box, as well as the center monitoring point on the top of the box for measuring the longitudinal vibration signal of the transformer box, and the top monitoring point of the center line on both wings of the box.
[0022] Among them, the trigger mechanism 2 can be arranged at the middle position of the top of the transformer box, and the trigger mechanism 2 includes a shell 21 fixedly installed on the transformer box, and a mounting structure is arranged on the outside of the shell 21, specifically including: mounting plates 21a are respectively connected to the two sides of the top of the shell 21, and a through hole is opened on the mounting plate 21a for the screw 21b to pass through, and the bottom end of the screw 21b is fixedly connected to the transformer box. A clamping nut 21c is arranged on the screw 21b above the mounting plate 21a, and the clamping nut 21c clamps and fixes the shell 21 on the transformer box. The bottom of the shell 21 is bonded and fixedly connected to the transformer box, and the installation is more stable and reliable. The shell 21 is pressed on the transformer box by the clamping nut 21c, so that the bottom of the shell 21 is tightly connected to the wall of the transformer box, ensuring better transmission of transformer box vibration and further ensuring the monitoring effect.
[0023] A vibrator 22 is arranged inside the shell 21. Preferably, the vibrator 22 can adopt a spherical structure. The vibrator 22 is suspended in the middle position inside the shell 21 through an elastic member 23. Resistance strain gauges 24 are respectively arranged above and below the vibrator 22 inside the shell 21. When the transformer box vibrates, the vibrator 22 moves up and down following the vibration. When the amplitude of the up and down vibration of the vibrator 22 is such that it can contact the resistance strain gauge 24 to cause it to deform, the trigger function is realized; specifically, the elastic member 23 adopts an elastic plate 23a horizontally arranged on both sides of the vibrator 22, one end of the elastic plate 23a is fixedly connected to the inner wall of the shell 21, and the other end is connected to the vibrator 22, or the elastic member 23 adopts a telescopic spring 23c, and support plates 23b are respectively arranged on both sides of the vibrator 22, and the top or bottom end or the top and top end of the support plate 23b are fixedly connected to a vertically arranged telescopic spring 23c, and the other end of the telescopic spring 23c is fixedly connected to the inner wall of the shell 21.
[0024] Among them, the monitoring platform 3 includes a general processor module 31, the general processor module 31 is connected to the trigger mechanism 2 and the vibration monitoring mechanism 1, and the vibration monitoring mechanism 1 is started when the trigger mechanism 2 sends a trigger signal; the general processor module 31 is connected to a data acquisition module 32, and the data acquisition module 32 is connected to the vibration monitoring mechanism 1 to obtain real-time monitoring data of the vibration monitoring mechanism 1; the general processor module 31 is also connected to a data analysis module 33 and a data storage module 34, the data analysis module 33 is used to analyze and process the real-time monitoring data of the vibration monitoring mechanism 1, determine whether the monitoring data reaches the set alarm or fault threshold and obtain the result, the data storage module 34 marks and stores the real-time monitoring data, the general processor module 31 is also connected to a relay protection module 35 and an alarm module 36, the relay protection module 35 is used to perform relay protection control processing on the transformer based on the analysis and processing results, and issue an alarm through the alarm module 36, and the general processor module 31 is also connected to a wireless communication module 37 for communication with the background.
[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific implementation modes of the present invention can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.
Claims
1. A distribution transformer relay protection system based on online monitoring data, characterized in that: It comprises a vibration monitoring mechanism (1) connected to a transformer box, a trigger mechanism (2) arranged on the transformer box and used to trigger the vibration monitoring mechanism (1), and a monitoring platform (3) connected to the vibration monitoring mechanism (1) and the trigger mechanism (2); Wherein, the vibration monitoring mechanism (1) comprises a plurality of groups of vibration sensors (11) arranged at a plurality of monitoring points on the transformer box; The trigger mechanism (2) comprises a housing (21) fixedly mounted on a transformer box, a vibrator (22) being arranged inside the housing (21), the vibrator (22) being suspended in the middle of the housing (21) via an elastic member (23), a resistance strain gauge (24) being arranged above and below the vibrator (22) inside the housing (21), the vibrator (22) moving up and down with the vibration when the transformer box vibrates, and a trigger function being achieved when the vibrator (22) vibrates up and down to such an amplitude that it can contact the resistance strain gauge (24) to cause deformation; The monitoring platform (3) comprises a main processor module (31), the main processor module (31) being connected to a trigger mechanism (2) and a vibration monitoring mechanism (1), and starting the vibration monitoring mechanism (1) when the trigger mechanism (2) sends a trigger signal; the main processor module (31) being connected to a data acquisition module (32), the data acquisition module (32) being connected to the vibration monitoring mechanism (1) and being used to obtain real-time monitoring data of the vibration monitoring mechanism (1); the main processor module (31) being further connected to a data analysis module (33) and a data storage module (34), the data analysis module (33) being used to The invention is used for analyzing and processing the real-time monitoring data of the vibration monitoring mechanism (1), judging whether the monitoring data reaches a set alarm or fault threshold and obtaining a result. The data storage module (34) performs marking processing on the real-time monitoring data and stores it. The main processor module (31) is also connected to a relay protection module (35) and an alarm module (36). The relay protection module (35) is used to perform relay protection control processing on the transformer based on the analysis and processing result, and to issue an alarm through the alarm module (36). The main processor module (31) is also connected to a wireless communication module (37) for communicating with the background.
2. A distribution transformer relay protection system based on online monitoring data according to claim 1, characterized in that: The selection of multiple monitoring points on the transformer box for setting multiple groups of vibration sensors (11) includes a monitoring point on the upper middle line of the high-voltage side, a monitoring point on the top middle line of the low-voltage side, and a monitoring point on the bottom middle line of the low-voltage side for measuring the lateral vibration signal of the transformer box, and a monitoring point on the top center of the box for measuring the longitudinal vibration signal of the transformer box, and a monitoring point on the top middle line of the box on both wings.
3. A distribution transformer relay protection system based on online monitoring data according to claim 1, characterized in that: The vibration sensor (11) is a piezoelectric acceleration sensor.
4. A distribution transformer relay protection system based on online monitoring data according to claim 1, characterized in that: The trigger mechanism (2) is arranged at the middle position of the top of the transformer box.
5. The distribution transformer relay protection system based on online monitoring data according to claim 1 is characterized in that: The vibrator (22) adopts a spherical structure.
6. A distribution transformer relay protection system based on online monitoring data according to claim 1, characterized in that: The elastic member (23) is an elastic plate (23a) horizontally arranged on both sides of the vibrator (22); one end of the elastic plate (23a) is fixedly connected to the inner wall of the housing (21), and the other end is connected to the vibrator (22).
7. A distribution transformer relay protection system based on online monitoring data according to claim 1, characterized in that: The elastic member (23) is a telescopic spring (23c), support plates (23b) are respectively provided on both sides of the vibrator (22), the top end or the bottom end or the top and the top ends of the support plate (23b) are fixedly connected to a vertically arranged telescopic spring (23c), and the other end of the telescopic spring (23c) is fixedly connected to the inner wall of the housing (21).
8. The distribution transformer relay protection system based on online monitoring data according to claim 1 is characterized in that: Mounting plates (21a) are connected to both sides of the top of the housing (21), and a through hole is provided on the mounting plate (21a) for the screw rod (21b) to pass through. The bottom end of the screw rod (21b) is fixedly connected to the transformer box. A clamping nut (21c) is provided on the screw rod (21b) above the mounting plate (21a). The clamping nut (21c) clamps and fixes the housing (21) to the transformer box. The bottom of the housing (21) is bonded and fixedly connected to the transformer box.