CN214096419U - Fluorescent optical fiber temperature measuring probe and device for oil-immersed transformer winding - Google Patents
Fluorescent optical fiber temperature measuring probe and device for oil-immersed transformer winding Download PDFInfo
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- CN214096419U CN214096419U CN202022814989.3U CN202022814989U CN214096419U CN 214096419 U CN214096419 U CN 214096419U CN 202022814989 U CN202022814989 U CN 202022814989U CN 214096419 U CN214096419 U CN 214096419U
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Abstract
The utility model provides an oil-immersed transformer is fluorescence optic fibre temperature probe and device for winding solves current temperature measurement mode to oil-immersed transformer, has the inaccurate, wrong report of easily appearing of measuring result and can lead to temperature measurement equipment to burn out and the dangerous problem of personnel's electric shock. The temperature measuring probe comprises a sheath compression ring, an optical fiber connector, a temperature measuring optical fiber, an optical fiber inner sheath and an optical fiber outer sheath which are sequentially sleeved from inside to outside; the optical fiber inner sheath is provided with a notch structure along the axial direction, and the optical fiber outer sheath adopts a spiral structure; one end of the optical fiber outer sheath is arranged in the optical fiber connector through a sheath pressing ring; one end of the temperature measuring optical fiber is bonded with a fluorescent material, and the other end is arranged in the optical fiber connector.
Description
Technical Field
The utility model relates to an optic fibre temperature measurement field especially relates to a below 35KV capacity oil-immersed transformer winding is with fluorescence optic fibre temperature probe and device.
Background
Oil-immersed transformers with the capacity of 35KV and below are key equipment of a power distribution system. The oil-immersed transformer works in the working environment of high voltage, heavy current and strong magnetic field for a long time, and can continuously generate heat in the operation process. The aging speed of the oil immersed transformer is doubled when the temperature of the oil immersed transformer rises by 6 ℃, and the service life is halved. The safe operation and the service life of the oil-immersed transformer depend on the safe reliability of the winding, so that the accurate measurement of the temperature of the winding of the transformer is very important to the service life of the transformer.
At present, the top oil temperature is measured mainly by adopting a metal platinum resistor temperature measurement mode for oil-immersed transformers with the capacity of 35KV and below. The principle of platinum resistance temperature measurement: based on the standard that the resistance value of a platinum resistor (PT100) is 100 ohms at 0 ℃, the resistance value of the platinum resistor regularly increases at a constant speed along with the increase of temperature. The equipment for measuring the oil temperature by adopting the metal platinum resistor mode has the following defects:
1. because the insulativity of the PT100 temperature measuring probe is difficult to ensure, the temperature measuring probe is not in direct contact with transformer oil actually when monitoring the oil temperature of the top layer of the transformer, but the oil temperature is conducted by the metal wall of the oil groove, and the inaccuracy of a measuring structure is caused.
2. The high voltage and large current generated during the operation of the oil-immersed transformer can influence the platinum resistor, and the detector can cause the problem of false alarm.
3. If the transformer has leakage fault, when the platinum resistor PT100 is used for temperature measurement, temperature measurement equipment can be burnt out, and people are in danger of electric shock.
4. Due to the influence of insulation, the platinum resistor PT100 collects the operating oil temperature of the transformer in a physical isolation heat transfer mode, hot spot temperature monitoring of a winding coil of the transformer cannot be achieved, and measured temperature data has serious hysteresis.
SUMMERY OF THE UTILITY MODEL
In order to solve current temperature measurement mode to oil-immersed transformer, have that measuring result is inaccurate, the wrong report easily appears and can lead to temperature measurement equipment to burn out and the dangerous technical problem of personnel's electric shock, the utility model provides a capacity oil-immersed transformer is fluorescence optic fibre temperature probe and device for winding below 35 KV.
In order to achieve the above purpose, the utility model provides a technical scheme is:
a fluorescent optical fiber temperature measuring probe for an oil-immersed transformer winding with the capacity of below 35KV is characterized in that: the temperature measuring optical fiber temperature measuring device comprises a sheath compression ring, an optical fiber connector, a temperature measuring optical fiber, an optical fiber inner sheath and an optical fiber outer sheath which are sequentially sleeved from inside to outside;
the optical fiber inner sheath is provided with a notch structure along the axial direction, and the optical fiber outer sheath adopts a spiral structure;
one end of the optical fiber outer sheath is arranged in the optical fiber connector through the sheath pressing ring;
one end of the temperature measuring optical fiber is bonded with a fluorescent material, and the other end of the temperature measuring optical fiber is arranged in the optical fiber connector.
Further, the optical fiber connector is an optical fiber ST connector.
Furthermore, the temperature measuring optical fiber is a quartz optical fiber.
Furthermore, the optical fiber inner sheath is made of PTFE.
And simultaneously, the utility model relates to a following capacity oil-immersed transformer of 35KV is fluorescence optic fibre temperature measuring device for winding, its special character lies in: the temperature measurement device comprises a protection box, a temperature measurement instrument, a switching optical fiber assembly and the temperature measurement probe;
the temperature measuring instrument is installed in the protection box, one end of the switching optical fiber assembly is connected with the temperature measuring instrument, and the other end of the switching optical fiber assembly is connected with an optical fiber connector of the temperature measuring probe outside the protection box.
Furthermore, a waterproof joint is arranged at the joint of the switching optical fiber assembly and the temperature measuring probe.
Compared with the prior art, the utility model has the advantages that:
1. the utility model discloses temperature probe can directly stretch into the inside optic fibre temperature measurement that carries on of transformer, and the incision structure has been seted up along the axial to the optic fibre inner sheath, and the optic fibre oversheath adopts helical structure for temperature probe installs when being surveyed the transformer inside, and temperature measurement optic fibre and sheath are inside can fully and transformer oil contact, and the partial discharge that prevents when transformer operation because of there is the air to arouse in the inside of temperature measurement optic fibre produces, guarantees the security of transformer when temperature probe uses.
2. The utility model discloses temperature probe adopts the optic fibre temperature measurement, and optic fibre adopts the quartz to make, has fine insulating nature, does not receive the transformer during operation to produce the interference of strong magnetic field, high voltage, heavy current for measuring result is accurate and the accuracy is higher.
3. The utility model discloses temperature measuring device carries out and designs to 35KV and following capacity's oil-immersed transformer's characteristics, can improve equipment's safe operation, the life of extension equipment, in time judge the actual load capacity of equipment, maximum performance distribution latent energy with improve equipment's economic benefits.
4. The utility model discloses temperature measuring device can realize quick temperature measurement and accurate temperature measurement, and the temperature is judged fastly, can accomplish the mS rank the fastest, and the accuracy of temperature measurement is high, can accomplish within 1 ℃.
5. The utility model discloses measuring device's switching fiber assembly and temperature probe need not the calibration at on-the-spot convenient to use, mark through the passing temperature before dispatching from the factory.
Drawings
FIG. 1 is a schematic structural view of a fluorescent optical fiber temperature measuring probe for an oil-immersed transformer winding with a capacity below 35KV according to the present invention;
fig. 2 is the structure schematic diagram of the fluorescent optical fiber temperature measuring device for the oil-immersed transformer winding with the capacity below 35KV of the utility model, wherein the reference numbers are as follows:
1-temperature measuring probe, 11-temperature measuring optical fiber, 12-optical fiber inner sheath, 13-optical fiber outer sheath, 14-sheath pressure ring, 15-optical fiber joint and 16-fluorescent material;
2-switching optical fiber component, 201-switching optical fiber, 209-corrugated pipe, 210-waterproof joint, 3-protection box, 31-air switch, 32-wiring terminal, 4-thermodetector and 5-nixie tube.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
The fluorescence optical fiber temperature measurement is realized based on the material characteristics of rare earth fluorescent substances, when the rare earth sensitive material is excited by light, electrons in the sensitive material absorb photons and jump from a low energy level to an excited state high energy level, and the electrons return to the low energy level from the high energy level to emit fluorescence. The persistent fluorescence emission after the elimination of the excitation light depends on the lifetime of the excited state. The emission usually decays exponentially, and the time constant of exponential decay can be used to measure the lifetime of the excited state, which is called fluorescence lifetime, and the length of fluorescence lifetime is determined by the temperature. The greatest advantage of using this method for temperature measurement is that the temperature of the measured object depends only on the time constant characteristic of the fluorescent material, but is not affected by other variables of the system. Therefore, compared with other temperature measurement methods, the method has the advantages of high interchangeability, good stability, no need of calibration, long service life and the like.
As shown in figure 2, the utility model discloses below 35KV capacity oil-immersed transformer is fluorescence optic fibre temperature measuring device for winding, including guard box 3, thermoscope 4, switching optical fiber subassembly 2 and temperature probe 1. The temperature measuring probe 1 is used for detecting the temperature inside the oil-immersed transformer, one end of the switching optical fiber assembly 2 is connected with the temperature measuring probe 1, the other end of the switching optical fiber assembly is connected with the temperature measuring instrument 4, the switching optical fiber assembly 2 is used for transmitting data collected by the temperature measuring probe 1 to the temperature measuring instrument 4, and the temperature measuring instrument 4 processes the data and displays the data through the nixie tube 5. When the switching optical fiber assembly 2 passes through the protection box 3, the connection with the protection box 3 can be realized through the waterproof switching connector. An air switch 31 and a connection terminal 32 are provided in the protection box 3, and the air switch 31 is connected to an external power supply through the connection terminal 32.
As shown in fig. 1, the temperature measuring probe 1 comprises a temperature measuring optical fiber 11, an optical fiber inner sheath 12, an optical fiber outer sheath 13, a sheath pressure ring 14 and an optical fiber connector 15; an optical fiber outer sheath 13 is sleeved on the optical fiber inner sheath 12, and one end of the optical fiber outer sheath 13 is sleeved in the optical fiber connector 15 through a sheath pressing ring 14; one end of the temperature measuring optical fiber 11 is bonded with a fluorescent material 16, the other end of the temperature measuring optical fiber passes through the optical fiber inner sheath 12 and then is arranged in the optical fiber connector 15, and the optical fiber connector 15 can adopt an optical fiber ST connector.
This embodiment temperature measurement optic fibre 11 adopts the quartz fiber material, and the detection part of temperature probe 1 adopts phosphor powder coating technology, and the incision structure has been seted up along the axial to optic fibre inner sheath 12 adoption PTFE material, and optic fibre oversheath 13 adopts the PTFE material and be helical structure, and the fiber end face adopts the finish polishing technology.
This embodiment temperature probe can directly stretch into transformer winding inside and carry out the optic fibre temperature measurement, and the notch structure of optic fibre inner sheath and the helical structure of optic fibre oversheath for when temperature probe installs inside being surveyed the transformer, the inside can fully contact with transformer oil of temperature measurement optic fibre and sheath, the partial discharge production that prevents when transformer operation from having the air to arouse because of temperature measurement optic fibre is inside discharges, leads to the emergence of incident, the security when guaranteeing temperature probe and using.
The temperature measuring probe 1 and the switching optical fiber assembly 2 of the temperature measuring device are connected on the construction site, the joint is protected by the waterproof connector 210, and the other end of the switching optical fiber assembly 2 can be conveniently connected to the protection box 3. The corrugated pipe 209 is arranged outside the switching optical fiber 201 of the switching optical fiber assembly 2, so that the length of the switching optical fiber 201 can be adjusted, different distances can be measured, the switching optical fiber 201 is protected and prevented from being damaged, and the switching optical fiber can also be dustproof, insect-proof and waterproof, and can avoid the aging phenomenon caused by direct sunlight; the whole protection performance of the temperature measuring device is good, and the accuracy of temperature measurement is guaranteed.
The utility model discloses temperature measuring device has very extensive application space except using on oil-immersed transformer in the electric power industry. Other industries also have wider application, such as temperature measurement and protection of special parts of trains, rapid temperature measurement and protection of parts in aerospace and the like.
The utility model discloses fluorescence optic fibre temperature measuring device compares with current temperature measuring device, has following characteristics:
the temperature measuring optical fiber 11 in the temperature measuring device of the embodiment is not a conductor, has good insulation, and the temperature measuring optical fiber 11 is not interfered by a strong magnetic field, high voltage and large current generated when the transformer works. The adoption of PT100 platinum resistor for temperature measurement must consider how to protect the device, and the anti-interference is one of the disadvantages of platinum resistor for temperature measurement.
The temperature measuring device can realize rapid temperature measurement and accurate temperature measurement, the temperature judgment speed is high, the mS level can be realized at the fastest speed, the temperature measurement accuracy is high, and the temperature can be within +/-1 ℃. The platinum resistor has slower temperature measuring speed and the precision is within +/-3 ℃.
The measuring device of the embodiment does not need to be calibrated on site, and the product is calibrated through temperature before being delivered out of a factory. Platinum resistance thermometry requires temperature calibration and calibration after a certain period of time. Meanwhile, the aging rate of the optical fiber head is far lower than that of a temperature measuring element for measuring temperature by a platinum resistor.
The measurement device of the embodiment has the advantages that the switching optical fiber component 2 and the temperature measuring probe 1 are convenient to use on the site of the switching optical fiber 201 and protected by the waterproof connector 210. The switching fiber 201 can be conveniently installed and connected with the protection box 3. The temperature measurement optical fiber 11 has good overall protection performance and strong waterproof and dustproof characteristics, so that the overall optical fiber and the optical fiber connector are not influenced by the environment, and the accuracy of temperature measurement is ensured.
The above description is only for the preferred embodiment of the present invention, and the technical solution of the present invention is not limited thereto, and any deformation made by those skilled in the art on the basis of the main technical concept of the present invention belongs to the technical scope to be protected by the present invention.
Claims (6)
1. A fluorescent optical fiber temperature measuring probe for an oil-immersed transformer winding with the capacity below 35KV is characterized in that: the temperature measurement device comprises a sheath clamping ring (14), an optical fiber connector (15), and a temperature measurement optical fiber (11), an optical fiber inner sheath (12) and an optical fiber outer sheath (13) which are sequentially sleeved from inside to outside;
the optical fiber inner sheath (12) is provided with a notch structure along the axial direction, and the optical fiber outer sheath (13) adopts a spiral structure;
one end of the optical fiber outer sheath (13) is arranged in the optical fiber connector (15) through the sheath press ring (14);
one end of the temperature measuring optical fiber (11) is bonded with a fluorescent material (16), and the other end is arranged in the optical fiber connector (15).
2. The fluorescent optical fiber temperature measuring probe for the oil-immersed transformer winding with the capacity of below 35KV according to claim 1, characterized in that: the optical fiber connector (15) is an optical fiber ST connector.
3. The fluorescent optical fiber temperature measuring probe for the oil-immersed transformer winding with the capacity of below 35KV according to claim 1 or 2, which is characterized in that: the temperature measuring optical fiber (11) is a quartz optical fiber.
4. The fluorescent optical fiber temperature measuring probe for the oil-immersed transformer winding with the capacity of below 35KV according to claim 3, characterized in that: the optical fiber inner sheath (12) is made of PTFE.
5. A fluorescent optical fiber temperature measuring device for an oil-immersed transformer winding with the capacity below 35KV is characterized in that: comprises a protection box (3), a temperature measuring instrument (4), a switching optical fiber component (2) and the temperature measuring probe (1) according to any one of claims 1 to 4;
the temperature measuring instrument (4) is installed inside the protection box (3), one end of the switching optical fiber assembly (2) is connected with the temperature measuring instrument (4), and the other end of the switching optical fiber assembly is connected with an optical fiber connector (15) of the temperature measuring probe (1) outside the protection box (3).
6. The fluorescent optical fiber temperature measuring device for the oil-immersed transformer winding with the capacity of below 35KV according to claim 5, is characterized in that: and a waterproof joint is arranged at the joint of the switching optical fiber assembly (2) and the temperature measuring probe (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022814989.3U CN214096419U (en) | 2020-11-29 | 2020-11-29 | Fluorescent optical fiber temperature measuring probe and device for oil-immersed transformer winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022814989.3U CN214096419U (en) | 2020-11-29 | 2020-11-29 | Fluorescent optical fiber temperature measuring probe and device for oil-immersed transformer winding |
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| Publication Number | Publication Date |
|---|---|
| CN214096419U true CN214096419U (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022814989.3U Active CN214096419U (en) | 2020-11-29 | 2020-11-29 | Fluorescent optical fiber temperature measuring probe and device for oil-immersed transformer winding |
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| CN (1) | CN214096419U (en) |
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- 2020-11-29 CN CN202022814989.3U patent/CN214096419U/en active Active
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