CN214471400U - Traction transformer optic fibre temperature measuring device - Google Patents
Traction transformer optic fibre temperature measuring device Download PDFInfo
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- CN214471400U CN214471400U CN202023142829.5U CN202023142829U CN214471400U CN 214471400 U CN214471400 U CN 214471400U CN 202023142829 U CN202023142829 U CN 202023142829U CN 214471400 U CN214471400 U CN 214471400U
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Abstract
The utility model relates to a traction transformer optical fiber temperature measuring device, which comprises a temperature measuring optical fiber, a through flange, a switching optical cable and a temperature measuring host; the temperature measuring optical fibers are arranged between winding wire cakes of the traction transformer and at the position of an iron core and transmit the afterglow light signals to the through flange; the adapter cable is connected between the through flange and the temperature measurement host and used for transmitting optical signals to the temperature measurement host. The utility model effectively solves the problem that the prior temperature measuring device can not monitor the temperature of the position of a winding isothermal point, and improves the monitoring accuracy of the running state of the traction transformer; the testing temperature and the historical data can be displayed and recorded in time and transmitted to the monitoring center through the optical cable.
Description
Technical Field
The utility model relates to an electric railway technical field, concretely relates to traction transformer optic fibre temperature measuring device.
Background
The traction transformer is used as a power transmission link of a power system and a traction power supply system, and the safety and the reliability of the traction transformer are very important. The oil temperature of the traction transformer and the winding hot spot temperature are important parameters for judging the running state of the traction transformer. Therefore, the method has important significance for accurately and reliably measuring the transformer oil temperature and the winding hot spot temperature.
At present, the measurement method of the transformer winding hot spot temperature mainly comprises an indirect calculation measurement method and a thermal simulation measurement method. The indirect calculation measurement method is that the top layer oil temperature is measured through PT100 according to a transformer hot spot temperature calculation model, an additional value is calculated according to the load current and the coil characteristics to determine the winding temperature so as to calculate the winding hot spot temperature value, but because many parameters are obtained depending on actual experience, the universality of the method and the field real-time application are limited. The thermal simulation measurement method is based on the relationship that the load loss of a transformer is in direct proportion to the square of current, a thermal simulation method temperature measuring device is installed in the transformer, the winding temperature is converted through temperature superposition, but the temperature rise process of running windings is different from simulation, the accuracy is relatively poor, and therefore the thermal simulation measurement method is stopped being used. In addition, the two methods both need to use an electric lead to transmit signals, which not only causes electromagnetic interference to the environment, but also causes poor accuracy and instantaneity of measurement results due to the influence of heat generated by the eddy current effect of the electric lead on the measured temperature, and cannot provide reliable transformer operation state information and decision support for operation departments.
Disclosure of Invention
The utility model aims at providing a traction transformer optic fibre temperature measuring device, hot operating temperature such as real-time on-line monitoring traction transformer's winding to through network with temperature measurement signal transmission to surveillance center, promote railway traction transformer operating condition monitoring ability.
The utility model discloses the technical scheme who adopts does:
the utility model provides a traction transformer optic fibre temperature measuring device which characterized in that:
the device comprises a temperature measuring optical fiber, a through flange, a switching optical cable and a temperature measuring host;
the temperature measuring optical fibers are arranged between winding wire cakes of the traction transformer and at the position of an iron core and transmit the afterglow light signals to the through flange; the adapter cable is connected between the through flange and the temperature measurement host and used for transmitting optical signals to the temperature measurement host.
The temperature measuring optical fiber consists of a high temperature resistant optical fiber, an optical fiber sheath, a connecting device and fluorescent powder;
the most front end of the temperature measuring optical fiber is coated with fluorescent powder, the position of the temperature measuring optical fiber where the fluorescent powder is coated is located at a temperature detection position, the high-temperature resistant optical fiber is used for transmitting optical signals, and the connecting device is used for connecting the temperature measuring optical fiber and the through flange.
The temperature measurement host comprises a light source system, a signal receiving system, a temperature demodulation system, a functional operation system, a display system and a protective shell;
the temperature signal is demodulated by transmitting an excitation signal to the temperature measuring optical fiber and receiving a fluorescence signal returned by the temperature measuring optical fiber, and the temperature signal is displayed by the display system and transmitted to the far end through the signal transmission interface.
The through flange is a switching unit between the temperature measuring optical fiber and the switching optical cable embedded in the traction transformer, consists of a sealing washer, a stainless steel plate and a through flange body, and is used for connecting the temperature measuring optical fiber and the switching optical cable, so that optical signals can be transmitted between the temperature measuring optical fiber and the switching optical cable uninterruptedly.
ST connectors are arranged at two ends of the switching optical cable, and PVC protective sleeves and Kevlar wires are arranged outside the switching optical cable for enhanced protection.
The temperature measurement host is hung on the outer side of the traction transformer oil tank.
The utility model has the advantages of it is following:
the utility model effectively solves the problem that the prior temperature measuring device can not monitor the temperature of the position of a winding isothermal point, and improves the monitoring accuracy of the running state of the traction transformer; the testing temperature and the historical data can be displayed and recorded in time and transmitted to the monitoring center through the optical cable.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is the schematic view of the installation process of the present invention.
The labels in the figure are:
1-temperature measuring optical fiber, 2-through flange, 3-switching optical cable, 4-temperature measuring host, 5-pressing plate, 6-end ring, 7-winding, 8-iron core, 9-low-voltage part, 10-paper cylinder, 11-middle-pressure area and 12-high-pressure area.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
In recent years, with the development of optical fiber sensing technology, a traction transformer winding hot spot temperature direct measurement method is receiving more and more attention. According to the method, the optical fiber sensor is directly embedded in the traction transformer winding to measure the winding temperature, the transmission of measurement signals is completed by light, no electric signal is introduced, the method adapts to the high-voltage and strong magnetic field environment in the traction transformer, the insulativity of the traction transformer is ensured, and direct, real-time and accurate dynamic measurement is provided for operation departments.
The utility model relates to a traction transformer optical fiber temperature measuring device, which comprises a temperature measuring optical fiber 1, a through flange 2, a switching optical cable 3 and a temperature measuring host 4; the temperature measuring optical fiber 1 is arranged between winding wire cakes of the traction transformer and at the position of an iron core and transmits a waste glow signal to the through flange 2; the adapter cable 3 is connected between the through flange 2 and the temperature measurement host 4 and used for transmitting optical signals to the temperature measurement host 4.
The temperature measuring optical fiber 1 is composed of a high temperature resistant optical fiber, an optical fiber sheath, a connecting device and fluorescent powder. The foremost end of the optical fiber is coated with fluorescent powder, the position of the temperature measuring optical fiber 1 coated with the fluorescent powder is located at a temperature detection position, the high-temperature resistant optical fiber is used for transmitting optical signals, and the connecting device is used for connecting the temperature measuring optical fiber 1 and the through flange 2.
The temperature measurement host 4 is based on the principle of fluorescence temperature measurement, and comprises a light source system, a signal receiving system, a temperature demodulation system, a functional operation system, a display system and a protective shell. The temperature signal is demodulated by transmitting an excitation signal to the temperature measuring optical fiber 1 and receiving a fluorescence signal returned by the temperature measuring optical fiber 1, and the temperature signal is displayed by a display system and can be transmitted to a far end through a signal transmission interface.
The through flange 2 is composed of a sealing washer, a stainless steel plate and a through flange body and is used for connecting the temperature measuring optical fiber 1 and the adapter cable 3, so that optical signals can be transmitted between the two uninterruptedly, and the requirements of the sealing performance of the traction transformer and the like can be met.
And ST connectors are adopted at two ends of the switching optical cable 3, and a PVC protective sleeve and Kevlar lines are arranged outside the switching optical cable for enhanced protection.
The temperature measurement host 4 is hung outside the traction transformer oil tank.
The invention is explained in further detail with reference to the drawings:
the utility model discloses a temperature measurement optic fibre 1, link up flange 2, switching optical cable 3 and temperature measurement host computer 4, its length through measuring the fluorescence afterglow life-span comes the test equipment temperature.
The temperature measuring optical fiber 1 is arranged between winding wire cakes of the traction transformer and at the position of an iron core. The foremost end of the temperature measuring optical fiber 1 is provided with a fluorescence detection substance, when the fluorescent substance is excited after being radiated by the light with the specific wavelength emitted by the temperature measuring host 4, a visible spectrum, namely fluorescence is generated, the fluorescence disappears gradually after the irradiation is stopped, the disappeared fluorescence is called afterglow, the service life of the afterglow reflects the temperature of the testing equipment, and the temperature measuring optical fiber 1 transmits the afterglow light signal to the through flange 2.
The through flange 2 is a switching unit between the temperature measuring optical fiber 1 embedded in the oil immersed transformer and the switching optical cable 3, and is specially designed for the optical fiber temperature measuring device of the traction transformer. The mechanical and optical hybrid component connected by adopting a special process has the characteristics of low optical signal loss, long-term reliable sealing property and oil resistance.
The adapter cable 3 is connected between the temperature measurement host 4 and the through flange 3, and transmits the optical signal transmitted by the temperature measurement optical fiber 1 to the temperature measurement host 4. The two ends of the cable adopt ST connectors with PVC protective sleeves and Kevlar lines for reinforcing protection. The optical fiber has the characteristics of low optical signal loss, large tensile resistance, good flexibility and the like.
The temperature measurement host 4 is hung on the outer side of the traction transformer oil tank and used for demodulating temperature optical signals transmitted back by the temperature measurement optical fibers 1, processing the signals by using transformer winding optical fiber temperature control system software, and outputting signals such as RS485 signals, relays and 4-20mA signals to the outside. The shell is made of special metal and has the functions of sealing protection and anti-electromagnetic interference. Data can be transmitted to the data acquisition system of other computers through a 485 bus.
The traction transformer is additionally provided with an optical fiber temperature measuring device of the traction transformer in the design process, and the parameters such as the installation position, the installation quantity, the optical fiber length and the like are designed. And in the manufacturing process of the traction transformer, the temperature measuring optical fiber is arranged at the positions of a winding, an iron core and the like according to the design requirement and is connected with the through flange, and the traction transformer delivery type test is integrally carried out.
After the traction transformer is transported to the site, the optical fiber temperature measuring device and the background are debugged, test data are transmitted to the data center in the modes of communication optical cables and the like, the remote monitoring of the running temperature of the traction transformer is realized, real-time data and historical data can be inquired at the far end, and the on-line real-time monitoring of the running state of the traction transformer is realized.
The content of the present invention is not limited to the examples, and any equivalent transformation adopted by the technical solution of the present invention is covered by the claims of the present invention by those skilled in the art through reading the present invention.
Claims (6)
1. The utility model provides a traction transformer optic fibre temperature measuring device which characterized in that:
the device comprises a temperature measuring optical fiber (1), a through flange (2), a switching optical cable (3) and a temperature measuring host (4);
the temperature measuring optical fiber (1) is arranged between winding wire cakes of the traction transformer and at the position of an iron core and transmits a waste glow signal to the through flange (2); the adapter cable (3) is connected between the through flange (2) and the temperature measurement host (4) and is used for transmitting optical signals to the temperature measurement host (4).
2. The optical fiber temperature measuring device for the traction transformer as recited in claim 1, wherein:
the temperature measuring optical fiber (1) consists of a high-temperature resistant optical fiber, an optical fiber sheath, a connecting device and fluorescent powder;
the foremost end of temperature measurement optic fibre (1) scribbles phosphor powder, and temperature measurement optic fibre (1) scribbles phosphor powder position department and is located temperature detection department, and high temperature resistant optic fibre is used for transmitting light signal, and connecting device is used for connecting temperature measurement optic fibre (1) and link up flange (2).
3. The optical fiber temperature measuring device for the traction transformer as recited in claim 2, wherein:
the temperature measurement host (4) comprises a light source system, a signal receiving system, a temperature demodulation system, a functional operation system, a display system and a protective shell;
the temperature signal is demodulated by transmitting an excitation signal to the temperature measuring optical fiber (1) and receiving a fluorescence signal returned by the temperature measuring optical fiber (1), and the temperature signal is displayed by the display system and transmitted to the far end through the signal transmission interface.
4. The optical fiber temperature measuring device of the traction transformer as recited in claim 3, wherein:
the through flange (2) is a switching unit between the temperature measuring optical fiber (1) embedded in the traction transformer and the switching optical cable (3), is composed of a sealing washer, a stainless steel plate and a through flange body and is used for connecting the temperature measuring optical fiber (1) and the switching optical cable (3) so that optical signals can be transmitted between the temperature measuring optical fiber and the switching optical cable uninterruptedly.
5. The optical fiber temperature measuring device of the traction transformer as recited in claim 4, wherein:
ST connectors are adopted at two ends of the switching optical cable (3), and a PVC protective sleeve and Kevlar lines are arranged outside the switching optical cable for enhanced protection.
6. The optical fiber temperature measuring device of the traction transformer as recited in claim 5, wherein:
the temperature measurement host (4) is suspended outside the traction transformer oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023142829.5U CN214471400U (en) | 2020-12-24 | 2020-12-24 | Traction transformer optic fibre temperature measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023142829.5U CN214471400U (en) | 2020-12-24 | 2020-12-24 | Traction transformer optic fibre temperature measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214471400U true CN214471400U (en) | 2021-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023142829.5U Active CN214471400U (en) | 2020-12-24 | 2020-12-24 | Traction transformer optic fibre temperature measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214471400U (en) |
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2020
- 2020-12-24 CN CN202023142829.5U patent/CN214471400U/en active Active
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