CN109935456B - Mounting structure of optical fiber temperature sensor of transformer - Google Patents
Mounting structure of optical fiber temperature sensor of transformer Download PDFInfo
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- CN109935456B CN109935456B CN201910380363.5A CN201910380363A CN109935456B CN 109935456 B CN109935456 B CN 109935456B CN 201910380363 A CN201910380363 A CN 201910380363A CN 109935456 B CN109935456 B CN 109935456B
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Abstract
The invention discloses a mounting structure of a transformer optical fiber temperature sensor, which belongs to the technical field of transformer monitoring and comprises an iron core, a clamping piece, a winding and spacing supporting strips, and further comprises an optical fiber temperature sensor and a sheath, wherein the winding is arranged on the outer side of the iron core and comprises an inner low-voltage winding and an outer high-voltage winding, and a plurality of spacing supporting strips are arranged between the low-voltage winding and the high-voltage winding; one large side surface of one of the interval supporting strips is provided with a groove for embedding the optical fiber temperature sensor; the wire outlet of the groove is connected with the sheath, and the sheath is fixedly connected in the groove of the clamping piece; and the transmission optical fiber of the optical fiber temperature sensor is communicated to a junction box outside the transformer box body sequentially through the groove and the sheath. The mounting structure of the optical fiber temperature sensor of the transformer is convenient and fast to mount, the safety coefficient of equipment is high, and the optical fiber temperature sensor is prevented from being damaged in the assembly process of the transformer.
Description
Technical Field
The invention relates to the technical field of transformer monitoring, in particular to a mounting structure of a transformer optical fiber temperature sensor.
Background
In the operation process of the power equipment, the power equipment is influenced by factors such as electricity, heat, natural environment, long-term work, overload work and the like, so that the equipment is easy to age, the performance is reduced, the reliability is reduced, and even the safe operation of a system is endangered. For example, the contact resistance is increased due to poor contact at the contact terminals or cable joints of the transformer, the switch cabinet, the ring main unit, etc., which causes over-high temperature rise of the contact terminals and causes accidents such as fire, explosion, etc. Therefore, it is necessary to perform real-time and online monitoring on the power equipment, find faults in time, eliminate accidents in a bud state and prolong the service life of the equipment. Sensors are generally used to monitor the safety of their electrical equipment. For an oil-immersed power transformer, when the load or the ambient temperature is too high, or when a heat dissipation oil passage inside a winding is blocked, the winding temperature of the transformer is abnormally increased. The transformer is subjected to a certain risk at this time, and the highest temperature occurring at a certain portion of the transformer winding is called a transformer hot spot temperature. Once the hot spot temperature exceeds the limit temperature of the transformer insulation, the insulation aging or insulation damage can be caused, the service life of the transformer is shortened, and even the body is damaged. Therefore, detecting and controlling the transformer hot spot temperature is a determining factor for ensuring the safe operation of the transformer.
Since the hot spot of the transformer is located inside the winding, the temperature of the transformer is directly detected by a fiber probe. At present, the installation of the optical fiber winding temperature measuring probe is carried out after the winding of the transformer winding is finished, the optical fiber temperature measuring probe is buried in a cushion block, the cushion block with the optical fiber temperature measuring probe replaces the cushion block at a hot point position, and the rest internal optical fibers are coiled and bound. The winding with the optical fiber is then subjected to an assembly process.
However, the optical fiber temperature sensor is very easily damaged during the installation process, which results in high use cost. Through a large number of observations, analyses and experiments, the damage of the optical fiber temperature sensor is mainly caused by the crushing damage of the optical fiber inside the optical fiber temperature sensor. The reason why the optical fiber temperature sensor is folded is mainly the accidental collision and bending during hoisting and assembling in the assembling process of the transformer.
Therefore, it is necessary to provide a mounting structure of a transformer optical fiber temperature sensor with convenient installation and high safety factor of equipment in view of the above-mentioned disadvantages.
Disclosure of Invention
The invention aims to provide an installation structure of an optical fiber temperature sensor of a transformer, which is convenient to install and high in safety coefficient of equipment, and avoids the damage of the optical fiber temperature sensor in the assembly process of the transformer.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention relates to an installation structure of a transformer optical fiber temperature sensor, which comprises an iron core, a clamping piece, a winding and spacing supporting strips, and further comprises an optical fiber temperature sensor and a sheath, wherein the winding is arranged on the outer side of the iron core, the winding comprises an inner low-voltage winding and an outer high-voltage winding, and a plurality of spacing supporting strips are arranged between the low-voltage winding and the high-voltage winding; one large side surface of one of the interval supporting strips is provided with a groove for embedding the optical fiber temperature sensor; the wire outlet at the upper end of the groove for embedding the optical fiber temperature sensor is connected with the sheath, and the sheath is fixedly connected in the limiting groove on the clamping piece; and the transmission optical fiber of the optical fiber temperature sensor is communicated to a junction box outside the transformer box body sequentially through the groove and the sheath on the spacing stay.
Furthermore, the groove on the spacing stay comprises a main channel, a branch channel and positioning notches, the two positioning notches are respectively positioned at two sides of the spacing stay, and the opening directions of the two positioning notches respectively face the low-voltage winding and the high-voltage winding; the main channel is vertically arranged in the middle of the interval stay along the length direction of the interval stay, and the tail end of the main channel is respectively communicated with the positioning notches through the two sub channels.
Furthermore, the optical fiber temperature sensor comprises a probe and a positioning block, the probe and the positioning block are bonded and compounded together, the probe is arranged at the tail end of the transmission optical fiber, the positioning block is clamped in the positioning notch, and the measuring end parts of the two probes respectively face the low-voltage winding and the high-voltage winding.
Furthermore, the interval stay further comprises small stoppers, the transmission optical fibers are blocked in the main channel and the sub-channels by the small stoppers, and the small stoppers are bonded on the large side surfaces of the interval stay.
Furthermore, the sheath is fixedly connected in the C-shaped groove of the clamping piece through a plurality of sheath fixing clamps, a notch corresponding to the outer diameter of the sheath is formed in the middle of each sheath fixing clamp, and two ends of each sheath fixing clamp are installed on the inner side of the clamping piece in an adhesion mode.
Furthermore, the sheath is provided with smooth round corners at the bending positions.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the mounting structure of the optical fiber temperature sensor of the transformer, the whole optical fiber temperature sensor is embedded in the groove and the sheath of the spacing stay, and no part is exposed outside, so that in the assembly process of the transformer after the optical fiber temperature sensor is mounted, when the transformer is integrally sleeved, assembled, dried and assembled, a probe of the suspended optical fiber temperature sensor or a transmission optical fiber is prevented from being damaged due to external forces such as extrusion, distortion and the like, and the mounting structure is neat and attractive.
In addition, the probe and the positioning block are bonded and compounded together before the temperature sensor is installed, so that the probe can be prevented from being impacted by external force in the installation process and can be conveniently installed and positioned, the positioning block is particularly adapted to the positioning notch in a regular hexagonal shape, the positioning block is convenient to position and prevent from rotating, and the detection angle of the probe is prevented from changing.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic diagram of the structure of the mounting structure of the optical fiber temperature sensor of the transformer according to the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is an enlarged view of section I of FIG. 2;
description of reference numerals: 1. an iron core; 2. a clamp; 3. a winding; 301. a low voltage winding; 302. a high voltage winding; 4. spacing stays; 4a, a main channel; 4b, a branch channel; 4c, positioning the notch; 401. a small stop block; 5. an optical fiber temperature sensor; 501. a probe; 502. positioning blocks; 503. a transmission optical fiber; 6. a sheath; 601. a sheath retaining clip.
Detailed Description
The core of the invention is to provide the mounting structure of the optical fiber temperature sensor of the transformer, which is convenient and fast to mount, has higher safety coefficient of equipment and avoids the damage of the optical fiber temperature sensor in the assembly process of the transformer.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In a specific embodiment, as shown in fig. 1 to 3, an installation structure of a transformer optical fiber temperature sensor includes an iron core 1, a clamping piece 2, a winding 3 and spacing support bars 4, and further includes an optical fiber temperature sensor 5 and a sheath 6, the winding 3 is disposed on the outer side of the iron core 1, the winding 3 includes an inner low-voltage winding 301 and an outer high-voltage winding 302, and a plurality of spacing support bars 4 are disposed between the low-voltage winding 301 and the high-voltage winding 302, so that insulation between the low-voltage winding 301 and the high-voltage winding 302 is ensured, and cooling through cooling oil is facilitated. One large side of one of the interval stay 4 is provided with a groove in which the optical fiber temperature sensor 5 is buried. An outlet of the groove for embedding the optical fiber temperature sensor 5 is connected with a sheath 6, the sheath 6 is fixedly connected in the C-shaped groove of the clamping piece 2, and the sheath 6 specifically adopts a Teflon hose or an insulating paper tube. The transmission optical fiber 503 of the optical fiber temperature sensor 5 is communicated to the junction box outside the transformer box body through the groove and the sheath 6 in sequence. Because the whole of the optical fiber temperature sensor 5 is embedded in the groove and the sheath 6 on the spacing stay 4, and no part is exposed outside, in the assembly process of the transformer after the optical fiber temperature sensor 5 is installed, when the transformer is integrally sleeved, assembled, dried and finally assembled, the damage of the probe of the suspended optical fiber temperature sensor 5 or the transmission optical fiber 503 caused by external forces such as extrusion, distortion and the like is avoided, and the transformer is neat and attractive.
In an embodiment of the present invention, as shown in fig. 3, the groove on the spacing stay 4 includes a main channel 4a, a sub-channel 4b and positioning notches 4c, the two positioning notches 4c are respectively located at two sides of the spacing stay 4 and have openings facing the low-voltage winding 301 and the high-voltage winding 302, and the positioning notches 4c are specifically regular hexagonal notches for facilitating positioning and preventing rotation. The main channel 4a is vertically arranged at the middle position of the interval stay 4 along the length direction of the interval stay 4, the tail end of the main channel 4a is respectively communicated with the positioning notches 4c through the two sub-channels 4b, and the transmission optical fiber 503 of the optical fiber temperature sensor 5 is laid in the main channel 4a and the sub-channels 4 b.
Further, as shown in fig. 3, the optical fiber temperature sensor 5 further includes a probe 501 and a positioning block 502, the probe 501 is disposed at the end of the transmission optical fiber 503, and the probe 501 and the positioning block 502 are bonded and compounded in advance, so that the probe 501 is prevented from being impacted by external force during installation and is also convenient to install and position, the positioning block 502 specifically adopts a regular hexagonal shape to adapt to the positioning notch 4c, and the detection angle of the probe 501 is prevented from changing. The shapes of the positioning notch 4c and the positioning block 502 are not limited to the regular hexagon, and it is only necessary to prevent the positioning block 502 from rotating and keep the direction of the probe 501 unchanged. The joint of locating piece 502 interference fit prevents to take place to drop in location breach 4 c. Note that when the positioning block 502 is installed, the measuring ends of the two probes 501 face the low-voltage winding 301 and the high-voltage winding 302, respectively, and measure the temperature of the hot spot of the low-voltage winding 301 and the high-voltage winding 302, respectively.
Further, the spacing stay 4 further includes small stoppers 401, several of which 401 block the transmission fibers 503 in the main channel 4a and the sub-channels 4b, the small stoppers 401 being bonded on the large side of the spacing stay 4 using PVA glue.
In an embodiment of the present invention, as shown in fig. 1, the sheath 6 is fixedly connected in the C-shaped groove of the clip member 2 by a plurality of sheath fixing clips 601, and the sheath fixing clips 601 are made of insulating paper. The middle part of the sheath fixing clip 601 is provided with a notch corresponding to the outer diameter of the sheath 6, and the two ends are installed on the inner side of the clip 2 in an adhesion mode. Further, the sheath 6 is provided with smooth round corners at the bending positions, so that the transmission optical fibers 503 are effectively prevented from being bent hard.
The mounting structure of the transformer optical fiber temperature sensor enables the optical fiber temperature sensor 5 to be completely buried or wired in the sheath 6, and damage caused by extrusion distortion due to exposure is avoided.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the scope of the present invention is defined by the claims.
Claims (3)
1. The utility model provides a transformer optic fibre temperature sensor's mounting structure, includes iron core (1), folder (2), winding (3) and interval stay (4), its characterized in that: the winding (3) is arranged on the outer side of the iron core (1), the winding (3) comprises an inner low-voltage winding (301) and an outer high-voltage winding (302), and a plurality of spacing supporting strips (4) are arranged between the low-voltage winding (301) and the high-voltage winding (302); one large side surface of one of the interval stay (4) is provided with a groove for embedding the optical fiber temperature sensor (5); a wire outlet at the upper end of the groove for embedding the optical fiber temperature sensor (5) is connected with the sheath (6), and the sheath (6) is fixedly connected in a C-shaped groove on the clamping piece (2); a transmission optical fiber (503) of the optical fiber temperature sensor (5) is communicated to a junction box outside the transformer box body sequentially through a groove on the spacing stay (4) and a sheath (6);
the groove on the spacing stay (4) comprises a main channel (4a), a branch channel (4b) and positioning notches (4c), the two positioning notches (4c) are respectively positioned at two sides of the spacing stay (4), and the opening directions of the two positioning notches respectively face the low-voltage winding (301) and the high-voltage winding (302); the positioning notch (4c) is a regular hexagon notch; the main channel (4a) is vertically arranged in the middle of the interval stay (4) along the length direction of the interval stay (4), and the tail end of the main channel (4a) is communicated with the positioning notch (4c) through the two sub-channels (4 b); the spacing stay (4) further comprises small blocks (401), the transmission optical fiber (503) is blocked in the main channel (4a) and the branch channel (4b) by the small blocks (401), and the small blocks (401) are adhered to the large side face of the spacing stay (4);
the optical fiber temperature sensor (5) comprises a probe (501) and a positioning block (502), the probe (501) and the positioning block (502) are bonded and compounded together, the positioning block (502) specifically adopts a regular hexagonal shape to be matched with the positioning notch (4c), the probe (501) is arranged at the tail end of the transmission optical fiber (503), the positioning block (502) is clamped in the positioning notch (4c) in an interference assembly mode, and the measuring end parts of the probe (501) face the low-voltage winding (301) and the high-voltage winding (302) respectively.
2. The mounting structure of a transformer optical fiber temperature sensor according to claim 1, wherein: the protective sleeve (6) is fixedly connected in the C-shaped groove of the clamping piece (2) through a plurality of protective sleeve fixing clamps (601), a notch corresponding to the outer diameter of the protective sleeve (6) is arranged in the middle of each protective sleeve fixing clamp (601), and two ends of each protective sleeve fixing clamp are installed on the inner side of the clamping piece (2) in an adhesion mode.
3. The mounting structure of a transformer optical fiber temperature sensor according to claim 2, wherein: the sheath (6) is provided with smooth round corners at the bending positions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910380363.5A CN109935456B (en) | 2019-05-08 | 2019-05-08 | Mounting structure of optical fiber temperature sensor of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910380363.5A CN109935456B (en) | 2019-05-08 | 2019-05-08 | Mounting structure of optical fiber temperature sensor of transformer |
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| Publication Number | Publication Date |
|---|---|
| CN109935456A CN109935456A (en) | 2019-06-25 |
| CN109935456B true CN109935456B (en) | 2021-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910380363.5A Expired - Fee Related CN109935456B (en) | 2019-05-08 | 2019-05-08 | Mounting structure of optical fiber temperature sensor of transformer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112985640A (en) * | 2021-03-05 | 2021-06-18 | 山东电工电气集团有限公司 | Temperature measurement optical fiber sensor group for transformer core |
| CN114005673B (en) * | 2021-11-30 | 2023-12-22 | 保定天威新域科技发展有限公司 | Oil immersed transformer winding integrated with optical fiber deformation sensor, mounting process and system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949744A (en) * | 2010-09-06 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Fiber grating-based transformer internal temperature detection system |
| CN106468599A (en) * | 2016-07-19 | 2017-03-01 | 国网电力科学研究院武汉南瑞有限责任公司 | Oil-immersed type transformer fiber optic temperature measuring probe fixing device |
| CN206847818U (en) * | 2017-06-30 | 2018-01-05 | 中国西电电气股份有限公司 | A kind of optical fiber temperature-measurement device |
| CN104990639B (en) * | 2015-07-01 | 2019-01-01 | 广东电网有限责任公司电力科学研究院 | A kind of optical fiber temperature-measurement structure on 10KV distribution transformer |
-
2019
- 2019-05-08 CN CN201910380363.5A patent/CN109935456B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949744A (en) * | 2010-09-06 | 2011-01-19 | 国网电力科学研究院武汉南瑞有限责任公司 | Fiber grating-based transformer internal temperature detection system |
| CN104990639B (en) * | 2015-07-01 | 2019-01-01 | 广东电网有限责任公司电力科学研究院 | A kind of optical fiber temperature-measurement structure on 10KV distribution transformer |
| CN106468599A (en) * | 2016-07-19 | 2017-03-01 | 国网电力科学研究院武汉南瑞有限责任公司 | Oil-immersed type transformer fiber optic temperature measuring probe fixing device |
| CN206847818U (en) * | 2017-06-30 | 2018-01-05 | 中国西电电气股份有限公司 | A kind of optical fiber temperature-measurement device |
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| CN109935456A (en) | 2019-06-25 |
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Effective date of registration: 20190918 Address after: 150000 Heilongjiang city of Harbin province Daoli District Shangzhi Street No. 188 Applicant after: STATE GRID HEILONGJIANG ELECTRIC POWER CO., LTD., HARBIN POWER SUPPLY Co. Applicant after: NORTH CHINA ELECTRIC POWER University (BAODING) Applicant after: STATE GRID CORPORATION OF CHINA Address before: 150000 Heilongjiang city of Harbin province Daoli District Shangzhi Street No. 188 Applicant before: STATE GRID HEILONGJIANG ELECTRIC POWER CO., LTD., HARBIN POWER SUPPLY Co. Applicant before: North China Electric Power University (Baoding) |
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