CN215770831U - Intelligent distribution transformer containing embedded sensor - Google Patents
Intelligent distribution transformer containing embedded sensor Download PDFInfo
- Publication number
- CN215770831U CN215770831U CN202122324215.7U CN202122324215U CN215770831U CN 215770831 U CN215770831 U CN 215770831U CN 202122324215 U CN202122324215 U CN 202122324215U CN 215770831 U CN215770831 U CN 215770831U
- Authority
- CN
- China
- Prior art keywords
- sensor
- distribution transformer
- iron core
- conversion unit
- vibration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Housings And Mounting Of Transformers (AREA)
- Testing Relating To Insulation (AREA)
- Protection Of Transformers (AREA)
Abstract
The utility model discloses an intelligent distribution transformer with an embedded sensor, and belongs to the technical field of power equipment state monitoring. Including the oil tank, the iron core, folder on the iron core, high voltage winding and low voltage winding, its characterized in that, the inside oil duct inside and in the middle of low voltage winding and the iron core of high voltage winding is equipped with a plurality of temperature sensor, be equipped with a plurality of vibration sensor on the folder on the iron core, inside intelligent terminal system and a plurality of partial discharge sensor of being equipped with of oil tank, temperature sensor, vibration sensor and partial discharge sensor all are connected with intelligent terminal system, intelligent terminal system installs outside the oil tank, intelligent terminal system and control center communication interconnection. The utility model realizes the real-time perception of the internal temperature, vibration and partial discharge parameters of the distribution transformer, can identify early faults in time, position and eliminate the early faults, avoids the slight faults from developing into power failure accidents, prolongs the service life of the distribution transformer and ensures the safe, stable and economic operation of the distribution network.
Description
Technical Field
The utility model belongs to the technical field of power equipment state monitoring, and relates to an intelligent distribution transformer comprising an embedded sensor.
Background
Distribution transformers are customer-oriented devices in a distribution network and play an important role in transmitting electrical energy. Oil easily receives the tide when oily formula distribution transformer long-term operation, reduces dielectric strength when corroding the metal body, easily produces partial discharge moreover and makes the oil temperature further rise and even take place accidents such as fire, then causes the power failure accident gently, more can cause the influence to the safety and stability operation of whole distribution network when serious.
Common faults of the oil-immersed distribution transformer comprise winding turn-to-turn short circuit, interlayer short circuit or oil temperature rise caused by long-term overload, and abnormal heating of the transformer; abnormal rattling caused by loosening of screws of the clamping piece or the pressing iron core; partial discharge due to insufficient internal insulation distance, and the like. The trouble takes place inside the transformer mostly, and has certain accumulative effect and disguise nature, and slight trouble if not discernment and get rid of in time, can develop into irrecoverable serious failure, finally causes malignant operation accident, and fortune dimension personnel only simply patrol distribution transformer outward appearance, often can't in time discover and discharge the trouble hidden danger, salvagees to organize when the trouble takes place and has to have a power failure, causes the influence to user's normal production life.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide the intelligent distribution transformer with the embedded sensor, so that the real-time sensing of the internal temperature, vibration and partial discharge parameters of the distribution transformer is realized, early faults can be identified in time, operation and maintenance personnel are helped to locate and remove the faults in time, the power failure accident which influences the production and life of users due to the development of slight faults is avoided, the service life of the distribution transformer is prolonged, and the safe, stable and economic operation of a power distribution network is guaranteed.
The utility model is realized by the following technical scheme:
the utility model discloses an intelligent distribution transformer with embedded sensors, which comprises an oil tank, an iron core, an upper iron core clamping piece, a high-voltage winding and a low-voltage winding, wherein a plurality of temperature sensors are arranged in oil ducts between the interior of the high-voltage winding and the iron core and between the interior of the low-voltage winding and the iron core, a plurality of vibration sensors are arranged on the upper iron core clamping piece, an intelligent terminal system and a plurality of local discharge sensors are arranged in the oil tank, the temperature sensors, the vibration sensors and the local discharge sensors are all connected with the intelligent terminal system, the intelligent terminal system is arranged outside the oil tank, and the intelligent terminal system is communicated and interconnected with a control center.
Preferably, the plurality of temperature sensors are uniformly distributed in the height direction of the coil.
Further preferably, the stay is provided with an arrangement groove, the temperature sensor is installed in the arrangement groove, and the temperature sensor is coated with insulating paper.
Preferably, the vibration sensors are respectively arranged at the intersection points of the iron core upper clamping pieces and the axes of the three-phase iron core columns.
Preferably, the surface of the vibration sensor is subjected to oil-proof and water-proof packaging and electromagnetic shielding treatment, and a signal wire connected with the vibration sensor is a double-layer shielded coaxial cable.
Preferably, the partial discharge sensor is installed on a support, a plurality of connecting holes are formed in the support, the support is connected with the inner wall of the oil tank through the connecting holes, and an antenna of the partial discharge sensor is in contact with oil.
Preferably, the intelligent terminal system comprises a power supply module, a sensor signal integration module, a data processing module and a communication module, wherein the power supply module and the sensor signal integration module are respectively connected with the temperature sensor, the vibration sensor and the partial discharge sensor, the sensor signal integration module is connected with the data processing module, and the data processing module is in communication interconnection with the control center through the communication module.
Further preferably, the power supply module is of a current sensing type, and includes an AC-DC conversion unit, a DC-UPS unit and a BUCK conversion unit, one end of the AC-DC conversion unit is connected to the low-voltage side of the transformer, the other end of the AC-DC conversion unit is connected to the DC-UPS unit, the DC-UPS unit is respectively connected to the BUCK conversion unit, the temperature sensor, the vibration sensor and the partial discharge sensor, and the BUCK conversion unit is respectively connected to the temperature sensor, the vibration sensor and the partial discharge sensor.
Further preferably, the data processing module is arranged in the shielding shell and comprises an A/D conversion unit, a processor unit and an external storage unit, one end of the A/D conversion unit is connected with the sensor signal integration module, the other end of the A/D conversion unit is connected with the processor unit, and the processor unit is connected with the external storage unit.
Further preferably, the external storage unit is a hybrid storage unit including Flash, SRAM, and RAM.
Compared with the prior art, the utility model has the following beneficial technical effects:
according to the intelligent distribution transformer with the embedded sensor, disclosed by the utility model, the temperature sensor, the vibration sensor and the local discharge sensor are embedded in the transformer, so that the real-time perception of the internal temperature, vibration and local discharge parameters of the distribution transformer is realized. In order to accurately measure the internal temperature of the winding, the installation space and heating components are comprehensively considered, and the temperature sensors are arranged in the high-voltage winding and the oil duct between the low-voltage winding and the iron core in combination with the electromagnetic thermal simulation of the winding. The vibration sensor is arranged on the clamping piece on the iron core, the vibration of the transformer is mainly caused by the magnetostriction of the iron core, but the vibration sensor cannot be fixed on the iron core lamination, the vibration simulation result of the magnetostriction of the iron core and the electromagnetic field environment inside the transformer are comprehensively considered, the vibration sensor is determined to be arranged on the clamping piece on the iron core, the vibration sensor is not only close to a vibration source as far as possible, but also is convenient to fixedly install, and the insulation damage inside the transformer cannot be caused. The partial discharge sensor is arranged in the oil tank, and can accurately monitor partial discharge. The collected data can timely identify early faults through the processing of the intelligent terminal system, timely help operation and maintenance personnel to locate the faults and remove the faults, avoid slight faults from developing into power failure accidents influencing production and life of users, prolong the service life of the distribution transformer and ensure safe, stable and economic operation of the power distribution network.
Furthermore, a plurality of temperature sensors are uniformly distributed in the height direction of the coil, so that the temperature distribution conditions of the transformers at different heights can be monitored.
Furthermore, the arrangement groove is formed in the supporting strip, the temperature sensor is convenient to install in the arrangement groove, the temperature sensor is coated with the insulating paper, the insulating strength can be improved, and partial discharge is prevented.
Furthermore, the vibration sensors are respectively arranged at the intersection points of the clamping pieces on the iron core and the axes of the three-phase iron core column, the distance from the vibration source is tight, the fixed installation is convenient, and meanwhile, the internal insulation damage of the transformer cannot be caused.
Furthermore, the surface of the vibration sensor is subjected to oil-proof and water-proof packaging and electromagnetic shielding treatment, and a signal wire connected with the vibration sensor is a double-layer shielded coaxial cable, so that power frequency interference can be reduced to the maximum extent, and the stability of signals is ensured.
Furthermore, the intelligent terminal system is complete in function and can integrate power supply, data acquisition, data processing and communication into a whole.
Furthermore, the power supply module is of a current induction type and can supply power directly from the interior of the transformer through current induction; the power supply module comprises an AC-DC conversion unit, a DC-UPS unit and a BUCK conversion unit, wherein the AC-DC conversion unit can convert 220V alternating current into constant voltage direct current by using 220V alternating current voltage on the low-voltage side of the transformer as a power supply; the DC-UPS unit can be used as an uninterruptible power supply to continuously provide stable direct-current voltage for the later stage, and the sensor is prevented from being suddenly powered off and incapable of working when the system fails; the BUCK conversion unit provides power supply voltages with different voltage amplitudes for different sensors at the rear stage respectively.
Furthermore, the data processing module is arranged in the shielding shell, so that the data processing module has the capability of resisting electromagnetic field interference.
Furthermore, the external storage unit is a mixed storage unit comprising Flash, SRAM and RAM, so that the safety and reliability of data can be ensured, and the processing speed of the programmable singlechip can be greatly increased.
Drawings
FIG. 1 is a schematic diagram of the general structure of an intelligent distribution transformer incorporating an embedded sensor according to the present invention;
FIG. 2 is a schematic view showing the installation position of a temperature sensor in the embodiment;
FIG. 3 is a schematic view of an installation structure of a temperature sensor in the embodiment;
fig. 4 is a schematic diagram of a system configuration of the intelligent terminal.
In the figure, 1 is an oil tank, 2 is an iron core, 3 is an iron core upper clamping piece, 4 is a vibration sensor, 5 is a high-voltage winding, 6 is a low-voltage winding, 7 is a temperature sensor, 8 is a partial discharge sensor, 9 is an intelligent terminal system, and 10 is a stay.
Detailed Description
The utility model is described in further detail below with reference to the following figures and examples:
referring to fig. 1, the intelligent distribution transformer with embedded sensors of the utility model comprises an oil tank 1, an iron core 2, an upper clamp 3 of the iron core, a high-voltage winding 5 and a low-voltage winding 6, and is characterized in that a plurality of temperature sensors 7 are arranged inside the high-voltage winding 5 and inside oil ducts between the low-voltage winding 6 and the iron core 2, a plurality of vibration sensors 4 are arranged on the upper clamp 3 of the iron core, an intelligent terminal system 9 and a plurality of partial discharge sensors 8 are arranged inside the oil tank 1, the temperature sensors 7, the vibration sensors 4 and the partial discharge sensors 8 are all connected with the intelligent terminal system 9, the intelligent terminal system 9 is installed outside the oil tank 1, and the intelligent terminal system 9 is in communication and interconnection with a control center.
In a preferred embodiment of the utility model, several temperature sensors 7 are distributed uniformly in the height direction of the coil. Specifically, the stay is provided with an arrangement groove, the temperature sensor 7 is installed in the arrangement groove, and the temperature sensor 7 is coated with insulating paper.
In a preferred embodiment of the utility model, the vibration sensors 4 are respectively arranged at the intersection points of the core upper clamp 3 and the core column axes of the three-phase core 2.
In a preferred embodiment of the present invention, the surface of the vibration sensor 4 is processed by oil-proof and water-proof packaging and electromagnetic shielding, and the signal line connected with the vibration sensor 4 is a double-shielded coaxial cable.
In a preferred embodiment of the present invention, the partial discharge sensor 8 is mounted on a support, the support is provided with a plurality of connection holes, the support is connected with the inner wall of the oil tank 1 through the connection holes, and an antenna of the partial discharge sensor 8 is in contact with the oil.
Referring to fig. 4, in a preferred embodiment of the present invention, the intelligent terminal system 9 includes a power supply module, a sensor signal integration module, a data processing module and a communication module, the power supply module and the sensor signal integration module are respectively connected to the temperature sensor 7, the vibration sensor 4 and the local discharge sensor 8, the sensor signal integration module is connected to the data processing module, and the data processing module is interconnected with the control center through the communication module.
Further optimally, the power supply module is of a current induction type and comprises an AC-DC conversion unit, a DC-UPS unit and a BUCK conversion unit, one end of the AC-DC conversion unit is connected with the low-voltage side of the transformer, the other end of the AC-DC conversion unit is connected with the DC-UPS unit, the DC-UPS unit is respectively connected with the BUCK conversion unit, the temperature sensor 7, the vibration sensor 4 and the local discharge sensor 8, and the BUCK conversion unit is respectively connected with the temperature sensor 7, the vibration sensor 4 and the local discharge sensor 8.
Further optimally, the data processing module is arranged in the shielding shell and comprises an A/D conversion unit, a processor unit and an external storage unit, one end of the A/D conversion unit is connected with the sensor signal integration module, the other end of the A/D conversion unit is connected with the processor unit, and the processor unit is connected with the external storage unit. Preferably, the external storage unit is a hybrid storage unit including Flash, SRAM, and RAM.
The utility model is further illustrated below in a specific embodiment:
in this embodiment, the temperature sensor 7 is selected to be pt100, and is arranged in the high-voltage winding 5 and the oil passages between the low-voltage winding 6 and the iron core 2 according to the position shown in fig. 2, and is installed at the position 1/3 away from the upper and lower parts of the winding by adopting the way of slotting in the stay shown in fig. 3, and the insulation problem is solved by wrapping corrugated paper.
The vibration sensor 4 is selected as an acceleration sensor DK37A23F100, the vibration sensor is arranged at the intersection of the iron core upper clamping piece 3 and the three-phase core column axis as shown in the figure 1, and a sensor shielding and wiring scheme is designed according to the electromagnetic field intensity of the iron yoke position. The surface of the sensor is subjected to oil-proof and water-proof packaging and electromagnetic shielding treatment, and a signal line of the sensor adopts a double-layer shielded coaxial cable, so that power frequency interference is reduced, and the stability of signals is ensured.
The partial discharge sensor 8 is selected as PDU-T2, is arranged on the oil tank 1 as shown in figure 1, and is connected with the inside of the oil tank 1 through a flange, so that the antenna is ensured to be in good contact with the oil.
In the production and manufacturing process of the distribution transformer, the sensors are arranged at corresponding positions according to the arrangement scheme, wherein the temperature sensor 7 is arranged in the coil assembly process, the vibration sensor 4 is arranged in the body assembly process, the partial discharge sensor 8 is arranged in a hole at the corresponding position of the oil tank 1, and the sensor lead is led out through a hole in the tank cover. The number of the external radiating fins of the oil tank 1 is reduced, so that the intelligent terminal system 9 is installed nearby, the lead distance is reduced as much as possible, and meanwhile, the oil tank 1 is well sealed.
The intelligent terminal system 9 comprises a power supply module, a multi-sensor signal integration module, a data processing and calculating module and a communication module. The power supply module adopts a mode of directly supplying energy from the interior of the transformer through current induction, and the power supply of the device is mainly divided into three steps: the device comprises an AC-DC conversion module, a DC-UPS module and a BUCK conversion module. The AC-DC conversion is to convert 220V alternating current into constant voltage direct current by using 220V alternating current voltage at the low voltage side of the intelligent distribution transformer as a power supply. In order to prevent the sensor from being suddenly powered off and incapable of working when the system fails, the DC-UPS serving as an uninterruptible power supply is added to continuously provide stable direct-current voltage for the later stage. The BUCK conversion module is used for respectively providing power supply voltages with different voltage amplitudes for different sensors at the rear stage.
The multi-sensor signal integration module utilizes the operational amplifier and the peripheral circuit to realize AD conversion of signals and normalization of amplitude, and data after normalization can be ensured to be stable when being transmitted to the programmable single chip microcomputer, so that transmission and storage are facilitated. The data processing and calculating module takes a programmable singlechip (or an FPGA logic control unit) as a core to ensure enough operation speed; the data are acquired from the multi-sensor signal integration module and then processed in the programmable singlechip through the AD conversion module, and the preprocessed temperature, partial discharge and vibration data are subjected to combined preliminary diagnosis, such as data abnormity, and alarm is triggered; the state of the distribution transformer is monitored through edge calculation, and equipment state evaluation, fault early warning and service life evaluation are carried out on the basis of the existing relation curve of temperature, vibration and partial discharge state quantity-service life, so that a corresponding maintenance scheme is customized according to the evaluated residual service life of the distribution transformer. The external storage module is a mixed storage module consisting of Flash, SRAM and RAM, and the mixed memory can ensure the safety and reliability of data and greatly improve the processing speed of the programmable singlechip. The programmable single chip processor, the computing module and the external storage module are all provided with shielding shells, so that the programmable single chip processor, the computing module and the external storage module have anti-electromagnetic field interference capability. The communication module adopts a 4G/5G wireless transmitting device to realize wireless co-network transmission.
It should be noted that the above description is only one embodiment of the present invention, and all equivalent changes of the system described in the present invention are included in the protection scope of the present invention. Persons skilled in the art to which this invention pertains may substitute similar alternatives for the specific embodiments described, all without departing from the scope of the utility model as defined by the claims.
Claims (10)
1. The utility model provides an intelligent distribution transformer containing embedded sensor, including oil tank (1), iron core (2), folder (3) on the iron core, high voltage winding (5) and low voltage winding (6), a serial communication port, high voltage winding (5) inside and low voltage winding (6) and the inside a plurality of temperature sensor (7) that are equipped with of oil duct in the middle of iron core (2), be equipped with a plurality of vibration sensor (4) on folder (3) on the iron core, inside intelligent terminal system (9) and a plurality of partial discharge sensor (8) of being equipped with in oil tank (1), temperature sensor (7), vibration sensor (4) and partial discharge sensor (8) all are connected with intelligent terminal system (9), intelligent terminal system (9) are installed in oil tank (1) outsidely, intelligent terminal system (9) and control center communication interconnection.
2. Intelligent distribution transformer containing embedded sensors, according to claim 1, characterized by several temperature sensors (7) that are evenly distributed in the height direction of the coil.
3. The intelligent distribution transformer with embedded sensors of claim 2, wherein the stay (10) is provided with an arrangement groove, the temperature sensor (7) is installed in the arrangement groove, and the temperature sensor (7) is coated with insulating paper.
4. Intelligent distribution transformer containing embedded sensors according to claim 1, characterized by that, the vibration sensors (4) are arranged at the intersection of the core upper clamp (3) and the core column axis of the three-phase core (2), respectively.
5. The intelligent distribution transformer with embedded sensors according to claim 1, characterized in that the surface of the vibration sensor (4) is treated by oil and water proof encapsulation and electromagnetic shielding, and the signal line connected with the vibration sensor (4) is a double-shielded coaxial cable.
6. The intelligent distribution transformer with the embedded sensor as claimed in claim 1, wherein the partial discharge sensor (8) is mounted on a support, the support is provided with a plurality of connecting holes, the support is connected with the inner wall of the oil tank (1) through the connecting holes, and an antenna of the partial discharge sensor (8) is in contact with the oil.
7. The intelligent distribution transformer with embedded sensors as claimed in claim 1, wherein the intelligent terminal system (9) comprises a power supply module, a sensor signal integration module, a data processing module and a communication module, the power supply module and the sensor signal integration module are respectively connected with the temperature sensor (7), the vibration sensor (4) and the local discharge sensor (8), the sensor signal integration module is connected with the data processing module, and the data processing module is in communication interconnection with the control center through the communication module.
8. The intelligent distribution transformer with embedded sensors of claim 7, wherein the power supply module is current-sensing, the power supply module comprises an AC-DC conversion unit, a DC-UPS unit and a BUCK conversion unit, one end of the AC-DC conversion unit is connected with the low voltage side of the transformer, the other end of the AC-DC conversion unit is connected with the DC-UPS unit, the DC-UPS unit is respectively connected with the BUCK conversion unit, the temperature sensor (7), the vibration sensor (4) and the local discharge sensor (8), and the BUCK conversion unit is respectively connected with the temperature sensor (7), the vibration sensor (4) and the local discharge sensor (8).
9. The intelligent distribution transformer with embedded sensors of claim 7, wherein the data processing module is disposed in the shielded enclosure, the data processing module comprises an A/D conversion unit, a processor unit and an external storage unit, one end of the A/D conversion unit is connected to the sensor signal integration module, the other end of the A/D conversion unit is connected to the processor unit, and the processor unit is connected to the external storage unit.
10. The intelligent distribution transformer with embedded sensors of claim 9, wherein the external memory unit is a hybrid memory unit comprising Flash, SRAM and RAM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122324215.7U CN215770831U (en) | 2021-09-23 | 2021-09-23 | Intelligent distribution transformer containing embedded sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122324215.7U CN215770831U (en) | 2021-09-23 | 2021-09-23 | Intelligent distribution transformer containing embedded sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215770831U true CN215770831U (en) | 2022-02-08 |
Family
ID=80090753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122324215.7U Active CN215770831U (en) | 2021-09-23 | 2021-09-23 | Intelligent distribution transformer containing embedded sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215770831U (en) |
-
2021
- 2021-09-23 CN CN202122324215.7U patent/CN215770831U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104362736B (en) | A kind of Intelligent component cabinet and its monitoring method for intelligent transformer | |
| CN208847372U (en) | A kind of ring network cabinet cable connector | |
| CN204088784U (en) | A kind of embedded electric cable accessories with temperature and electric current on-line monitoring function | |
| CN211291774U (en) | Temperature measurement type GIS inner cone plug-in terminal | |
| CN109253816A (en) | A kind of ring network cabinet electric terminal temperature transducer | |
| CN202600017U (en) | Intelligent temperature, humidity and current on-line real-time monitoring contact box | |
| CN105655100A (en) | 10kV-level epoxy resin cast dry-transformer | |
| CN215770831U (en) | Intelligent distribution transformer containing embedded sensor | |
| CN113921257A (en) | Intelligent distribution transformer containing embedded sensor | |
| CN102623900A (en) | Intelligent two-way sleeve for monitoring pressure, temperature and moisture on line in real time | |
| CN202853762U (en) | Suspension electricity acquiring device especially for medium-voltage intelligent wireless temperature measurement of breaker contact arm | |
| CN204373809U (en) | A kind of watchband type passive and wireless temperature measurement on-line device | |
| CN114726453B (en) | Anti-interference wireless communication device and box-type substation | |
| CN203037771U (en) | Hybrid vehicle insulation monitoring device based on low-frequency signal | |
| CN214427335U (en) | Device for monitoring hydrogen concentration inside oil-immersed bushing on line | |
| CN209980962U (en) | Three-phase digital distribution transformer | |
| CN210803673U (en) | Electric connection piece integrated sensor for intelligent motor | |
| CN202487967U (en) | Intelligent pressure, temperature and moisture online real-time monitor bi-pass casing | |
| CN208847360U (en) | A kind of ring network cabinet electric terminal temperature transducer | |
| CN207967487U (en) | A kind of conductor temperature measuring type T-type cable connector device | |
| CN207313983U (en) | A kind of electric clothes airing machine transmission system of integral module | |
| CN111537840A (en) | T-shaped cable joint insulation rear plug with passive ultrasonic monitoring function | |
| CN201811979U (en) | High-voltage box structure of high-voltage motor static insulating monitor | |
| CN102636677A (en) | Intelligent type online real-time monitoring contact box for temperature, humidity and current | |
| CN211265256U (en) | Safe, convenient and pollution-resistant voltage transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |