CN109903977B - Distributed optical fiber-based transformer winding parameter detection method - Google Patents
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- 239000003822 epoxy resin Substances 0.000 claims abstract description 25
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 25
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention discloses a distributed optical fiber-based transformer winding parameter detection method. The method comprises the steps of firstly, measuring the size of a winding to calculate the number of turns of optical fibers to be wound on each turn of the winding, winding the optical fibers on one turn of conducting wire on the outermost side of each turn of conducting wire on the winding according to the number of turns of the optical fibers, and fixing the wound optical fibers by using epoxy resin. The distributed optical fiber is wound on the continuous winding in the transformer and is adopted to detect parameter information of deformation, temperature and the like of the transformer winding, so that accurate and reliable measurement of required sensing quantity can be realized. Meanwhile, the optical fiber winding mode adopted by the invention ensures that the optical fiber is more economical to use and has the minimum influence on the winding insulation level, thereby further improving the positioning precision; the invention also adopts the epoxy resin to seal the optical fiber, thereby improving the anti-interference performance of the sealed winding and jointly ensuring the accuracy, reliability and economy of the transformer winding parameter detection.
Description
Technical Field
The invention relates to the technical field of transformer winding parameter detection, in particular to a distributed optical fiber-based transformer winding parameter detection method.
Background
At present, for the detection of various parameters of a transformer winding, such as deformation conditions, temperature and the like, because the transformer winding is positioned in an oil tank and cannot be directly observed and measured, an indirect method is generally adopted for detection. The winding deformation detection methods include a low-voltage pulse method, a short-circuit impedance method, a frequency response method, an ultrasonic method, a vibration method and the like, but the methods have the problems of being incapable of accurately positioning, being easily interfered by the outside and the like. The winding hot spot temperature detection comprises a top layer oil temperature push algorithm, a hot circuit model and a finite element simulation method, and the methods are low in precision and positioning precision. These problems restrict further improvements in transformer load levels and operating efficiency.
Disclosure of Invention
The invention aims to provide a distributed optical fiber-based transformer winding parameter detection method, which aims to solve the problems of low positioning precision and easy external interference of the existing transformer winding parameter detection method.
In order to achieve the purpose, the invention provides the following scheme:
a distributed optical fiber-based transformer winding parameter detection method comprises the following steps:
acquiring transformer winding parameters and optical fiber parameters; the transformer winding parameters comprise the width of a wire wide surface of the transformer winding and the winding radius; the fiber parameters include fiber diameter and spatial resolution;
determining the number of turns of the optical fiber wound on each cake of winding according to the transformer winding parameters and the optical fiber parameters;
acquiring a winding mode of a lead on the transformer winding; the winding mode of the wire comprises transposition at the outer diameter side of the winding and transposition at the inner side of the winding;
winding the optical fiber on the surface of the transformer winding according to the number of turns of the optical fiber and the winding mode to form a transformer winding wound with the optical fiber;
adopting epoxy resin to fixedly seal the optical fiber wound on the surface of the transformer winding with the wound optical fiber to form a fixedly sealed transformer winding;
and detecting the parameters of the transformer winding by adopting the optical fiber wound on the surface of the transformer winding after the sealing.
Optionally, the determining the number of turns of the optical fiber wound on each cake of winding according to the transformer winding parameter and the optical fiber parameter specifically includes:
according to the transformer winding parameters and the optical fiber parameters, adopting a formula
Determining the number n of turns of the optical fiber wound on each cake of winding; wherein D represents the winding radius; σ represents the spatial resolution; r represents the fiber diameter; l represents the width of the wire; k is a preset value.
Optionally, the optical fiber is wound on the surface of the transformer winding according to the number of turns of the optical fiber and the winding mode to form a transformer winding after the optical fiber is wound, and the method specifically includes:
when the number of turns of the optical fiber is one and the winding mode is that the position is changed at the outer diameter side of the winding, firstly winding the optical fiber on the surface of the first cake winding; and after the optical fiber on the surface of the first pancake winding is wound, transitioning to the next pancake winding along the wire transposition part of the transformer winding to continue winding until the optical fibers on the surfaces of all the windings are wound, so as to form the transformer winding wound with the optical fibers.
Optionally, the optical fiber is wound on the surface of the transformer winding according to the number of turns of the optical fiber and the winding mode to form a transformer winding after the optical fiber is wound, and the method specifically includes:
when the number of turns of the optical fiber is multiple, and the winding mode is that the position is changed at the outer diameter side of the winding, the multiple turns of the optical fiber on the surface of the first cake winding are wound firstly; the first circle of optical fiber and the middle circle of optical fiber on the surface of the first pancake winding descend to the surface of the current pancake winding at the position of the wire transposition and continue to be wound; and a circle of optical fiber at the tail end of the surface of the first pancake winding is transited to the next pancake winding along the wire transposition part to be continuously wound until the optical fibers on the surfaces of all the windings are wound, so that the transformer winding with the wound optical fiber is formed.
Optionally, the optical fiber is wound on the surface of the transformer winding according to the number of turns of the optical fiber and the winding mode to form a transformer winding after the optical fiber is wound, and the method specifically includes:
when the number of turns of the optical fiber is one and the winding mode is that the position is changed on the inner diameter side of the winding, firstly winding the optical fiber on the surface of the first cake winding; and after the optical fiber on the surface of the first pancake winding is wound, directly transitioning to the next pancake winding at the wire transposition position of the continuous two-pancake transformer winding to continue winding until the optical fibers on the surfaces of all the windings are wound, so as to form the transformer winding wound with the optical fibers.
Optionally, the optical fiber is wound on the surface of the transformer winding according to the number of turns of the optical fiber and the winding mode to form a transformer winding after the optical fiber is wound, and the method specifically includes:
when the number of turns of the optical fiber is multiple, and the winding mode is that the position is changed on the inner diameter side of the winding, the multiple turns of the optical fiber on the surface of the first cake winding are wound firstly; the first circle of optical fiber and the middle circle of optical fiber on the surface of the first pancake winding are lifted to the surface of the current pancake winding at the position of the wire transposition and are continuously wound; and a circle of optical fiber at the tail end of the surface of the first pancake winding is directly transited to the next pancake winding at the wire transposition position of the two continuous pancake transformer windings for continuous winding until the optical fibers on the surfaces of all the windings are wound to form the transformer winding wound with the optical fibers.
Optionally, when the optical fiber or the multiple circles of optical fibers on the surface of the first cake winding are wound, 10-20m of free optical fibers are reserved at the beginning of the optical fiber or the multiple circles of optical fibers and used for leading out signals and welding joints; and the optical fiber is kept at the center of the wide-face insulating paper of the lead during winding.
Optionally, the optical fiber wound on the surface of the transformer winding after the optical fiber is wound is sealed by epoxy resin to form a sealed transformer winding, and the method specifically includes the following steps:
coating epoxy resin glue on the optical fiber wound on the surface of the transformer winding after the optical fiber is wound; and standing the winding after the epoxy resin glue is coated so as to solidify the epoxy resin and form the solid-sealed transformer winding.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a distributed optical fiber-based transformer winding parameter detection method, which comprises the steps of firstly, measuring the size of a winding to calculate the number of turns of optical fibers to be wound on each turn of the winding, winding optical fibers on one turn of conducting wires at the outermost side of each turn of conducting wires on the winding according to the number of turns of the optical fibers, and fixing the wound optical fibers by using epoxy resin. The distributed optical fiber is wound on the continuous winding in the transformer and is adopted to detect parameter information of deformation, temperature and the like of the transformer winding, so that accurate and reliable measurement of required sensing quantity can be realized. Meanwhile, the optical fiber winding mode adopted by the invention ensures that the optical fiber is more economical to use and has the minimum influence on the winding insulation level, thereby further improving the positioning precision; the invention also adopts the epoxy resin to seal the optical fiber, thereby improving the anti-interference performance of the sealed winding and jointly ensuring the accuracy, reliability and economy of the transformer winding parameter detection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings provided by the present invention without any creative effort.
FIG. 1 is a flow chart of a distributed optical fiber-based transformer winding parameter detection method according to the present invention;
FIG. 2 is a layout of a single turn of optical fiber on the winding surface;
FIG. 3 is a layout diagram of multiple turns of optical fibers on the winding surface (taking 3 turns as an example);
FIG. 4 is a view showing the arrangement of a plurality of turns of optical fibers on the winding surface (a cross-sectional view taken along the direction E-E' in FIG. 3);
FIG. 5 is a schematic diagram of the arrangement of a single turn of optical fiber on a continuous winding;
FIG. 6 is a schematic diagram of the arrangement of multiple turns of optical fiber on a continuous winding (taking 3 turns as an example);
FIG. 7 is a schematic diagram of how the optical fiber is adhered to the winding surface (a cross-sectional view taken along line E-E' in FIG. 3, taking 3 turns as an example);
in the figure, 1, a winding wire, 2, an optical fiber, 3, insulating paper, 4, a winding conductor part, 5, a transposition and lifting area at the outer diameter side of a continuous winding, 6, a transposition position at the inner diameter side of the continuous winding and 7, epoxy resin glue are adopted.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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.
The distributed optical fiber sensing has the advantages of high measurement and positioning accuracy, capability of sensing information such as winding temperature, strain, vibration and the like, and becomes a new hotspot for development and research. The invention provides a distributed optical fiber-based transformer winding parameter detection method, which aims to solve the problems that the existing transformer winding parameter detection method is low in positioning precision and easy to be interfered by the outside world.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Fig. 1 is a flowchart of a distributed optical fiber-based transformer winding parameter detection method provided by the invention. Referring to fig. 1, the distributed optical fiber-based transformer winding parameter detection method provided by the invention comprises the following steps:
step 101: and acquiring transformer winding parameters and optical fiber parameters.
The invention firstly determines the number of turns of the optical fiber wound on each cake winding according to the spatial resolution corresponding to the measuring mode of the distributed optical fiber sensing and the size (including the winding mode and the diameter of the winding and the size and the type of a lead) of the transformer winding (the winding is abbreviated as the invention). And then winding the optical fiber according to the number of turns of the winding and the type of the winding wire to be wound, tightly winding the optical fiber on one circle of wire at the outermost side of each circle of wire of the winding, keeping a certain tension force during winding, and ensuring that each circle of optical fiber is tightly attached to each other without gaps. And at the position of the wire transposition, the optical fiber is transited to the next cake, and the transition mode is determined by the wire winding mode.
The parameters of the transformer winding adopted by the invention comprise the width of the wide surface of the lead of the transformer winding and the radius of the winding; the fiber parameters include fiber diameter and spatial resolution; as shown in table 1 below:
TABLE 1 Transformer winding parameters and fiber parameters
| Parameter(s) | Presentation symbol |
| Diameter of optical fiber | r |
| Width of wide surface of wire | l |
| Radius of winding | D |
| Spatial resolution | σ |
The transformer winding parameters and the optical fiber parameters can be obtained by measuring and referring to the specification.
Step 102: and determining the number of turns of the optical fiber wound on each cake of winding according to the transformer winding parameters and the optical fiber parameters.
The number of fiber turns n stuck on each turn (cake) of winding is determined by the following constraints:
the preset value k is selected according to actual conditions, and generally takes a value larger than 1, and if the winding diameter is smaller, the minimum value can be 0.8.
Step 103: and acquiring the winding mode of the lead on the transformer winding.
The winding mode of the wire comprises transposition on the outer diameter side of the winding and transposition on the inner side of the winding. And at the position of the wire transposition, the optical fiber is transited to the next cake, and the transition mode is determined by the winding mode of the wire.
Step 104: and winding the optical fiber on the surface of the transformer winding according to the number of turns of the optical fiber and the winding mode to form the transformer winding wound with the optical fiber.
And after the number n of turns of the optical fiber wound by each cake of winding is calculated, winding the optical fiber. The optical fiber is wound on the wide surface of the outermost wire of each cake winding of the transformer, as shown in fig. 2 and 3, and can be wound for different numbers of turns according to different winding sizes and instrument resolutions. The winding should be carried out in the same winding direction of the wire and the winding, and 10-20m of free optical fiber should be reserved at the beginning for leading out signals and welding joints. Care was taken to keep the fibers centered in the copper wire broadside insulation as shown in fig. 2 and 3. Meanwhile, certain tension is kept during winding, and each circle of optical fiber is ensured to be attached to the optical fiber as much as possible without leaving gaps or crossing, as shown in fig. 4.
At the transition position of the two-cake lead, when transposition occurs on the outer diameter side of the winding, if only one circle of optical fiber needs to be wound, the lead is transited to the next cake along the transposition position of the lead and is continuously wound; if a plurality of circles of optical fibers need to be wound, the head and the tail of the optical fibers are wound according to the method, and the middle circle is descended to the current circle of conducting wire at the transposition position to be continuously wound, as shown in fig. 5 and 6.
When transposition occurs on the inner diameter side of the winding, if only one circle of optical fiber is wound, the transposition part of the two-cake conductor is directly transited to the next cake, and the suspended part of the optical fiber is parallel to the upper and lower transposition areas of the cake winding; if a plurality of circles of optical fibers need to be wound, except for the head and the tail, the middle circle is lifted to the current circle of conducting wire at the transposition position to be continuously wound, as shown in fig. 5 and 6.
Therefore, the step 104 specifically includes the following four cases:
(1) when the number of turns of the optical fiber is one and the winding mode is that the position is changed at the outer diameter side of the winding, firstly winding the optical fiber on the surface of the first cake winding; and after the optical fiber on the surface of the first pancake winding is wound, transitioning to the next pancake winding along the wire transposition part of the transformer winding to continue winding, and adopting the same winding method until the optical fibers on the surfaces of all the windings are wound to form the transformer winding wound with the optical fibers.
(2) When the number of turns of the optical fiber is multiple, and the winding mode is that the position is changed at the outer diameter side of the winding, the multiple turns of the optical fiber on the surface of the first cake winding are wound firstly; the first circle of optical fiber and the middle circle of optical fiber on the surface of the first pancake winding descend to the surface of the current pancake winding at the position of the wire transposition and continue to be wound; and a circle of optical fiber at the tail end of the surface of the first pancake winding is transited to the next pancake winding along the wire transposition part to be continuously wound, and the same winding method is adopted until the optical fibers on the surfaces of all the windings are completely wound to form the transformer winding after the optical fibers are wound.
(3) When the number of turns of the optical fiber is one and the winding mode is that the position is changed on the inner diameter side of the winding, firstly winding the optical fiber on the surface of the first cake winding; and after the optical fiber on the surface of the first pancake winding is wound, directly transitioning to the next pancake winding at the wire transposition position of the continuous two-pancake transformer winding to continue winding, and adopting the same winding method until the optical fibers on the surfaces of all the windings are wound to form the transformer winding wound with the optical fibers.
(4) When the number of turns of the optical fiber is multiple, and the winding mode is that the position is changed on the inner diameter side of the winding, the multiple turns of the optical fiber on the surface of the first cake winding are wound firstly; the first circle of optical fiber and the middle circle of optical fiber on the surface of the first pancake winding are lifted to the surface of the current pancake winding at the position of the wire transposition and are continuously wound; and a circle of optical fiber at the tail of the surface of the first pancake winding is directly transited to the next pancake winding at the wire transposition position of the continuous two-pancake transformer winding to continue winding, and the same winding method is adopted until the optical fibers on the surfaces of all the windings are wound to form the transformer winding wound with the optical fibers.
And after the optical fiber is wound on the winding, detecting by using an optical fiber test pen, and if no breakpoint exists, sticking and fixedly sealing the optical fiber by using epoxy resin glue.
Step 105: and adopting epoxy resin to seal the optical fiber wound on the surface of the transformer winding wound with the optical fiber to form the sealed transformer winding.
After the optical fibers are wound, the optical fibers are adhered by using epoxy resin glue, the glue application amount is required to enable the surface of the glue solution to uniformly cover all the optical fibers wound on the surface of the winding during adhering, the glue application amount cannot be too small to enable the surface of the optical fibers to be exposed, the glue solution cannot be too much to flow down, and the reasonable glue application amount is shown in fig. 7.
And standing the winding after the epoxy resin adhesive is coated so as to cure the epoxy resin, wherein the standing time is determined according to the environmental temperature and the property of the epoxy resin and is different from 2-3h to 1-2 days. During curing of the epoxy glue, the windings can be adjusted axially to horizontal, if conditions allow, and rotated slowly along the axis to avoid flow or dripping of uncured epoxy glue. And after the epoxy resin is cured, the winding can be assembled to form the solid-sealed transformer winding.
Step 106: and detecting the parameters of the transformer winding by adopting the optical fiber wound on the surface of the transformer winding after the sealing.
The transformer winding parameter detection method can refer to the existing transformer optical fiber temperature measurement principle or deformation detection principle.
After the optical fiber is wound and adhered on the surface of the transformer winding, the sensing precision and the economical efficiency of optical fiber arrangement can be effectively ensured, otherwise, the optical fiber on one turn of coil is too short due to random adhesion, complete strain and temperature information cannot be sensed, or the optical fiber is too long, so that waste is caused. The method of the invention uses the epoxy resin glue to paste the optical fiber, which not only can ensure that the bonding body has certain hardness to ensure the completeness of strain transmission, but also has certain toughness to prevent the bonding body from generating cracks, fractures and even falls off after the winding is deformed in faults such as short circuit and the like, the epoxy resin glue can also resist the impregnation of transformer oil and the high-temperature environment of 200 ℃ at most, the flashover voltage and the breakdown voltage of the epoxy resin glue are far higher than those of oil paper insulation at the same distance, and the reliability and the safety of the pasting can be fully ensured.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed herein should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the core idea of the apparatus of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A distributed optical fiber-based transformer winding parameter detection method is characterized by comprising the following steps:
acquiring transformer winding parameters and optical fiber parameters; the transformer winding parameters comprise the width of a wire wide surface of the transformer winding and the winding radius; the fiber parameters include fiber diameter and spatial resolution;
determining the number of turns of the optical fiber wound on each cake of winding according to the transformer winding parameters and the optical fiber parameters, and specifically comprising the following steps:
according to the transformer winding parameters and the optical fiber parameters, adopting a formula
Determining the number n of turns of the optical fiber wound on each cake of winding; wherein D represents the winding radius; σ represents the spatial resolution; r represents the fiber diameter; l represents the width of the wire; k is a preset value;
acquiring a winding mode of a lead on the transformer winding; the winding mode of the wire comprises transposition at the outer diameter side of the winding and transposition at the inner diameter side of the winding;
winding the optical fiber on the surface of the transformer winding according to the number of turns of the optical fiber and the winding mode to form a transformer winding wound with the optical fiber;
adopting epoxy resin to fixedly seal the optical fiber wound on the surface of the transformer winding with the wound optical fiber to form a fixedly sealed transformer winding;
and detecting the parameters of the transformer winding by adopting the optical fiber wound on the surface of the transformer winding after the sealing.
2. The method according to claim 1, wherein the optical fiber is wound on the surface of the transformer winding according to the number of turns of the optical fiber and the winding manner to form the transformer winding after the optical fiber is wound, and the method specifically includes:
when the number of turns of the optical fiber is one and the winding mode is that the position is changed at the outer diameter side of the winding, firstly winding the optical fiber on the surface of the first cake winding; and after the optical fiber on the surface of the first pancake winding is wound, transitioning to the next pancake winding along the wire transposition part of the transformer winding to continue winding until the optical fibers on the surfaces of all the windings are wound, so as to form the transformer winding wound with the optical fibers.
3. The method according to claim 1, wherein the optical fiber is wound on the surface of the transformer winding according to the number of turns of the optical fiber and the winding manner to form the transformer winding after the optical fiber is wound, and the method specifically includes:
when the number of turns of the optical fiber is multiple, and the winding mode is that the position is changed at the outer diameter side of the winding, the multiple turns of the optical fiber on the surface of the first cake winding are wound firstly; the first circle of optical fiber and the middle circle of optical fiber on the surface of the first pancake winding descend to the surface of the current pancake winding at the position of the wire transposition and continue to be wound; and a circle of optical fiber at the tail end of the surface of the first pancake winding is transited to the next pancake winding along the wire transposition part to be continuously wound until the optical fibers on the surfaces of all the windings are wound, so that the transformer winding with the wound optical fiber is formed.
4. The method according to claim 1, wherein the optical fiber is wound on the surface of the transformer winding according to the number of turns of the optical fiber and the winding manner to form the transformer winding after the optical fiber is wound, and the method specifically includes:
when the number of turns of the optical fiber is one and the winding mode is that the position is changed on the inner diameter side of the winding, firstly winding the optical fiber on the surface of the first cake winding; and after the optical fiber on the surface of the first pancake winding is wound, directly transitioning to the next pancake winding at the wire transposition position of the continuous two-pancake transformer winding to continue winding until the optical fibers on the surfaces of all the windings are wound, so as to form the transformer winding wound with the optical fibers.
5. The method according to claim 1, wherein the optical fiber is wound on the surface of the transformer winding according to the number of turns of the optical fiber and the winding manner to form the transformer winding after the optical fiber is wound, and the method specifically includes:
when the number of turns of the optical fiber is multiple, and the winding mode is that the position is changed on the inner diameter side of the winding, the multiple turns of the optical fiber on the surface of the first cake winding are wound firstly; the first circle of optical fiber and the middle circle of optical fiber on the surface of the first pancake winding are lifted to the surface of the current pancake winding at the position of the wire transposition and are continuously wound; and a circle of optical fiber at the tail end of the surface of the first pancake winding is directly transited to the next pancake winding at the wire transposition position of the two continuous pancake transformer windings for continuous winding until the optical fibers on the surfaces of all the windings are wound to form the transformer winding wound with the optical fibers.
6. The detection method according to claim 2 or 4, characterized in that 10-20m of free optical fiber is reserved at the beginning for leading out signals and welding joints when the optical fiber on the surface of the first cake winding is wound; and the optical fiber is kept at the center of the wide-face insulating paper of the lead during winding.
7. The detection method according to claim 3 or 5, characterized in that when a plurality of circles of optical fibers on the surface of the first cake winding are wound, 10-20m of free optical fibers are reserved at the beginning for leading out signals and welding joints; and the optical fiber is kept at the center of the wide-face insulating paper of the lead during winding.
8. The detection method according to claim 1, wherein the optical fiber wound on the surface of the transformer winding wound with the optical fiber is sealed by epoxy resin to form a sealed transformer winding, and the method specifically comprises:
coating epoxy resin glue on the optical fiber wound on the surface of the transformer winding after the optical fiber is wound; and standing the winding after the epoxy resin glue is coated so as to solidify the epoxy resin and form the solid-sealed transformer winding.
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| EP0342468A1 (en) * | 1988-05-20 | 1989-11-23 | Asea Brown Boveri Ag | Rail winding |
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2019
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0342468A1 (en) * | 1988-05-20 | 1989-11-23 | Asea Brown Boveri Ag | Rail winding |
| CN103376166A (en) * | 2013-06-28 | 2013-10-30 | 国网电力科学研究院武汉南瑞有限责任公司 | Arrangement and burying method of optical fiber grating temperature sensors in transformer |
| CN105258745A (en) * | 2015-11-09 | 2016-01-20 | 山东省科学院激光研究所 | Downhole optical fiber distributed flow monitoring system |
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| 基于分布式光纤传感的变压器绕组变形检测与故障识别可行性研究;刘云鹏等;《高电压技术》;20190531;第1485页及附图3 * |
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Address after: No. 619 Yonghuabei Street, Lianchi District, Baoding City, Hebei Province Applicant after: NORTH CHINA ELECTRIC POWER UNIVERSITY (BAODING) Applicant after: STATE GRID HEILONGJIANG ELECTRIC POWER CO., LTD., HARBIN POWER SUPPLY Co. 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) Applicant before: STATE GRID CORPORATION OF CHINA |
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