CN212379498U - Real-time service life assessment system applied to distribution network transformer - Google Patents
Real-time service life assessment system applied to distribution network transformer Download PDFInfo
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- CN212379498U CN212379498U CN202020883565.XU CN202020883565U CN212379498U CN 212379498 U CN212379498 U CN 212379498U CN 202020883565 U CN202020883565 U CN 202020883565U CN 212379498 U CN212379498 U CN 212379498U
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- 238000009826 distribution Methods 0.000 title claims abstract description 31
- 230000005684 electric field Effects 0.000 claims abstract description 43
- 230000032683 aging Effects 0.000 claims abstract description 23
- 238000011156 evaluation Methods 0.000 claims abstract description 21
- 238000009421 internal insulation Methods 0.000 claims abstract description 4
- 239000011810 insulating material Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- 239000011241 protective layer Substances 0.000 claims description 4
- 239000004020 conductor Substances 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000011160 research Methods 0.000 abstract description 3
- 238000005304 joining Methods 0.000 abstract description 2
- 238000012806 monitoring device Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 2
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- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000012552 review Methods 0.000 description 1
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Abstract
The utility model discloses a be applied to real-time evaluation system of life-span of joining in marriage net transformer belongs to the plant maintenance and the research field of transformer, include: the service life monitoring device comprises a transformer body and a service life analysis device for evaluating the running state and the residual service life of the transformer body in real time; the transformer comprises a transformer body, wherein a first temperature sensor and a first electric field intensity sensor are attached to the highest temperature position inside the transformer body under each working condition; the transformer body is provided with a second temperature sensor and a second electric field intensity sensor in an attached mode at the position of the maximum aging rate of the internal insulation part under each working condition; and the data input interface of the service life analysis device is connected with the output ends of the temperature sensors and the electric field intensity sensors. The utility model discloses can improve the evaluation degree of accuracy to distribution network transformer's running state and life-span, provide strong guarantee for distribution network transformer's safety maintenance.
Description
Technical Field
The utility model belongs to the equipment maintenance and the research field of transformer, more specifically relates to a be applied to and join in marriage real-time evaluation system of life-span of net transformer.
Background
The distribution network transformer is a power transformer used for voltage class below 35kV, is an important device for supplying power to distribution network load, and the safe operation of the distribution network transformer is an important premise for ensuring reliable power supply.
The insulating parts in the distribution network transformer mainly comprise composite insulating materials consisting of mineral oil and insulating paper or paperboards, and are gradually aged due to the influence of various factors in the long-term operation process, so that the electrical and mechanical properties of insulation are reduced, and the whole service life of the transformer is damaged. Therefore, the running state and the service life of the distribution network transformer are evaluated in real time, the risk possibly existing in the distribution network transformer can be found in time, corresponding measures can be taken in time, and the method and the device have important significance for safety maintenance of the distribution network transformer.
At present, various methods and systems for evaluating the operation state and the service life of a distribution network transformer in real time exist, but various aging factors of the distribution network transformer are mutually coupled and mutually influenced and jointly influence the operation environment of internal elements of equipment, and the existing evaluation method and system do not fully consider the point, so the evaluation accuracy still needs to be further improved.
SUMMERY OF THE UTILITY MODEL
To prior art's defect and improvement demand, the utility model provides a be applied to distribution network transformer's real-time evaluation system of life-span, its aim at improves the evaluation degree of accuracy to distribution network transformer's running state and life-span, provides strong guarantee for distribution network transformer's safety maintenance.
In order to achieve the above object, according to an aspect of the present invention, there is provided a life real-time evaluation system applied to a distribution network transformer, including: the service life monitoring device comprises a transformer body and a service life analysis device for evaluating the running state and the residual service life of the transformer body in real time;
the transformer comprises a transformer body, wherein a first temperature sensor and a first electric field intensity sensor are attached to the highest temperature position inside the transformer body under each working condition; the transformer body is provided with a second temperature sensor and a second electric field intensity sensor in an attached mode at the position of the maximum aging rate of the internal insulation part under each working condition;
and the data input interface of the service life analysis device is connected with the output ends of the temperature sensors and the electric field intensity sensors.
Furthermore, the output ends of the temperature sensors and the electric field intensity sensors are led out through lead-out wires, and the lead-out wires are welded on the bonding wire sheets wrapped by the insulating materials;
the bonding wire sheet is fixed in the transformer box body, and a lead on the bonding wire sheet is connected to a data input interface of the service life analysis device.
Furthermore, an insulating protective layer is additionally arranged on a wire contact part of the temperature sensor and the electric field intensity sensor.
Furthermore, each temperature sensor and each electric field intensity sensor are attached to the corresponding position on the transformer body through special glue.
Furthermore, each temperature sensor and each electric field intensity sensor are attached to the corresponding position on the transformer body in a welding mode.
Further, the utility model provides a be applied to distribution network transformer's real-time evaluation system of life still includes: the display alarm is used for displaying the running state of the transformer body and the residual life evaluation result;
and the input end of the display alarm is connected to the data output interface of the service life analysis device.
Furthermore, the display alarm is a nixie tube or a flat panel display.
Generally, through the utility model discloses above technical scheme who conceives can gain following beneficial effect:
(1) because in insulating part's all kinds of ageing factors, use equipment extreme temperature and electric field intensity as the main, the utility model discloses use the biggest ageing speed position of inside highest temperature position and insulating part under each operating mode of transformer body as the measurement station to paste at each measurement station and establish temperature sensor and electric field intensity sensor, can accurately gather extreme temperature and electric field intensity, thereby can effectively improve the running state and the evaluation accuracy degree of remaining life to transformer body, provide the powerful guarantee for the safety maintenance of distribution network transformer.
(2) The utility model discloses utilize insulating material parcel welding temperature sensor and electric field strength sensor's lead-out wire's bonding wire piece, install insulating protective layer additional at temperature sensor and electric field strength sensor's wire contact part, can effectively improve the life of sensor.
(3) The utility model discloses utilize special glue, or adopt the welding mode to paste temperature sensor and electric field strength sensor and establish the transformer body on, can prevent effectively that the sensor from droing, effectively improve the life of sensor.
Drawings
Fig. 1 is a schematic structural diagram of a real-time service life evaluation system applied to a distribution network transformer according to an embodiment of the present invention;
the same reference numbers will be used throughout the drawings to refer to the same or like elements or structures, wherein:
the transformer comprises a transformer body 1, a first temperature sensor 2, a first electric field intensity sensor 3, a second temperature sensor 4, a second electric field intensity sensor 5, a highest temperature position 6, a maximum aging rate position 7, a maximum temperature position sensor bonding wire 8, a maximum aging rate position sensor bonding wire 9, a maximum aging rate position sensor bonding wire 10, a life analysis device 11, a data input interface 11, a life analysis central processing unit 12, a data output interface 13, a display alarm 14, a nixie tube 15 and a flat panel display 16.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
In the present invention, the terms "first", "second", and the like in the drawings are used for distinguishing similar objects if any, and are not necessarily used for describing a specific order or sequence.
In order to improve the evaluation degree of accuracy to the running state and the life-span of joining in marriage net transformer, for join in marriage net transformer's safety maintenance and provide strong guarantee the utility model discloses an in the embodiment, provide a be applied to and join in marriage net transformer's real-time evaluation system of life-span, as shown in FIG. 1, include: the device comprises a transformer body 1, a service life analysis device 10 for evaluating the running state and the residual service life of the transformer body 1 in real time, and a display alarm 14 for displaying the running state and the residual service life evaluation result of the transformer body 1;
the transformer comprises a transformer body 1, wherein a first temperature sensor 2 and a first electric field intensity sensor 3 are attached to the position 6 of the highest temperature inside the transformer body under each working condition; the transformer comprises a transformer body 1, wherein a second temperature sensor 4 and a second electric field intensity sensor 5 are attached to a position 7 of the maximum aging rate of an internal insulation part under each working condition;
a service life analysis device 10, wherein a data input interface 11 of the service life analysis device is connected with the output ends of each temperature sensor and each electric field intensity sensor; a display alarm 14, the input end of which is connected to the data output interface 13 of the life analysis device 10; a display alarm 14, the input end of which is connected to the data output interface 13 of the life analysis device 10; the service life analysis device 10 further comprises a service life analysis central processing unit 12, and after data output by the sensor is transmitted to the service life analysis device 10 through the data input interface 11, the service life analysis central processing unit 12 evaluates the running state and the residual service life of the transformer body 1;
in the present embodiment, the output terminals of the temperature sensors and the electric field strength sensors are led out through lead-out wires, and the lead-out wires are soldered to the bonding wire pieces wrapped with the insulating material; as shown in fig. 1, the leading-out lines of the first temperature sensor 2 and the first electric field strength sensor 3 attached at the highest temperature position 6 are welded to the bonding pad 8, and the leading-out lines of the second temperature sensor 4 and the second electric field strength sensor 5 attached at the highest aging rate position 7 are welded to the bonding pad 9;
the bonding wire sheet is fixed in the transformer box body, and a lead on the bonding wire sheet is connected to a data input interface 11 of the service life analysis device 10;
an insulating protective layer is additionally arranged at the contact part of the temperature sensor and the conducting wire of the electric field intensity sensor;
in this embodiment, each temperature sensor and each electric field strength sensor are attached to the corresponding position on the transformer body 1 through special glue, or each temperature sensor and each electric field strength sensor are attached to the corresponding position on the transformer body 1 in a welding manner;
the display alarm 14 is a nixie tube 15 or a flat panel display 16.
When the transformer works, the highest temperature position inside the transformer body under each working condition and the maximum aging rate position of the insulating part are taken as measuring points, the temperature data of the measuring points are collected by the first temperature sensor 2 and the second temperature sensor 4, and the electric field intensity data of the measuring points are collected by the second temperature sensor 3 and the second electric field intensity sensor 5; the temperature data and the electric field intensity data collected by the sensor are transmitted to the service life analysis device 10 through the data input interface 11, the service life analysis central processing unit 12 evaluates the running state and the residual service life of the transformer body 1 according to the temperature data and the electric field data, and the evaluation result is transmitted to the display alarm 14 through the data output interface 13 to be displayed.
The installation position of the sensor, that is, the position of the highest temperature inside the transformer body under each working condition and the position of the maximum aging rate of the insulating component, can be determined by any method, which is not limited herein, for example, by referring to the method disclosed in "optimization of vibration measurement points of transformer based on finite element analysis" (author: li yang sea, wang guangting, published: 2017), the following steps are adopted:
a1, establishing a finite element model of the distribution network transformer: carrying out finite element analysis on the equipment structure of the distribution network transformer, and respectively establishing finite element models of the distribution network transformer in different environments by applying different loads and external temperatures as boundary conditions;
a2, analyzing the internal operation state of the equipment based on the finite element model: carrying out load setting on the finite element model under each boundary condition established in the step A1, and simulating the distribution data of the electric field and the temperature field of the equipment corresponding to each boundary condition one by one;
a3, determining defective parts and aging rate of distribution network transformers: determining the maximum electric field intensity, the maximum temperature, the maximum aging rate and the position information of the maximum aging rate of the distribution network transformer under the corresponding working condition according to the analysis data obtained in the step A2;
further determination methods will not be listed here.
The life analysis cpu 12 may adopt any evaluation method to evaluate the operating state and remaining life of the transformer body 1 according to the temperature data and the electric field data, and is not limited herein, for example, the evaluation method may be carried out by referring to the method disclosed in "research review on aging and life evaluation of oil-immersed power transformer" (author: euro wavelet, zhoudan, linchu shoal, published time: 2015 years):
judging the running state and the residual service life information of the transformer body 1: calculating the aging rate at the monitoring point according to a mathematical model of the aging rate of the insulating part of the transformer, analyzing the running state and the residual service life of the transformer body 1 according to the accumulated value of the aging rate, and judging whether the transformer body 1 works in an unhealthy state, whether the aging rate is out of limit or not and whether the residual service life is insufficient or not; the transformer insulation component aging rate model consists of a negative nth power model and an Arrhenius model, and parameters of the model comprise Boltzmann constant, pre-exponential factor activation energy of an insulation material and expected service life under normal working conditions;
further evaluation methods will not be listed here.
In another embodiment of the present invention, similar to the above embodiments, the difference is that the alarm 14 is not shown in this embodiment.
Generally speaking, the utility model discloses use the biggest ageing speed position of inside highest temperature position and insulating part under each operating mode of transformer body to be the measurement station to paste in each measurement station and establish temperature sensor and electric field strength sensor, extreme temperature and electric field strength can be accurately gathered, thereby can effectively improve the running state of transformer body and the aassessment degree of accuracy of residual life, provide strong guarantee for the safety maintenance of distribution network transformer.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. The utility model provides a life-span real-time assessment system for join in marriage net transformer which characterized in that includes: the device comprises a transformer body (1) and a service life analysis device (10) for evaluating the running state and the residual service life of the transformer body (1) in real time;
the transformer comprises a transformer body (1), wherein a first temperature sensor (2) and a first electric field intensity sensor (3) are attached to the position (6) with the highest temperature in each working condition; the transformer body (1) is characterized in that a second temperature sensor (4) and a second electric field intensity sensor (5) are attached to the position (7) of the maximum aging rate of the internal insulation component under each working condition;
and the data input interface (11) of the service life analysis device (10) is connected with the output ends of the temperature sensors and the electric field intensity sensors.
2. The system of claim 1, wherein the output terminals of the temperature sensors and the electric field strength sensors are led out through lead wires, and the lead wires are soldered to the bonding wires wrapped with the insulating material;
the bonding wire sheet is fixed in the transformer box body, and a lead on the bonding wire sheet is connected to a data input interface (11) of the service life analysis device (10).
3. The system of claim 1, wherein the portion of the temperature sensor in contact with the conductor of the electric field strength sensor is further provided with an insulating protective layer.
4. The system for real-time service life assessment of distribution network transformers according to claim 1, wherein each temperature sensor and each electric field strength sensor are attached to the corresponding position on the transformer body (1) by means of special glue.
5. The system for real-time service life assessment of distribution network transformers according to claim 1, wherein each temperature sensor and each electric field strength sensor are attached to the corresponding position on the transformer body (1) by welding.
6. The system for real-time life assessment of distribution network transformers according to any of claims 1-5, further comprising: a display alarm (14) for displaying the running state and the residual life evaluation result of the transformer body (1);
and the input end of the display alarm (14) is connected to the data output interface (13) of the service life analysis device (10).
7. The system for real-time life assessment of distribution network transformers according to claim 6, wherein the display alarm (14) is a nixie tube (15) or a flat panel display (16).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020883565.XU CN212379498U (en) | 2020-05-22 | 2020-05-22 | Real-time service life assessment system applied to distribution network transformer |
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| CN202020883565.XU CN212379498U (en) | 2020-05-22 | 2020-05-22 | Real-time service life assessment system applied to distribution network transformer |
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| CN212379498U true CN212379498U (en) | 2021-01-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116953417A (en) * | 2023-09-20 | 2023-10-27 | 国网湖北省电力有限公司经济技术研究院 | Power transformer service life assessment device and method |
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2020
- 2020-05-22 CN CN202020883565.XU patent/CN212379498U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116953417A (en) * | 2023-09-20 | 2023-10-27 | 国网湖北省电力有限公司经济技术研究院 | Power transformer service life assessment device and method |
| CN116953417B (en) * | 2023-09-20 | 2023-12-15 | 国网湖北省电力有限公司经济技术研究院 | Power transformer service life assessment device and method |
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