CN213843493U - Transformer bushing live-line test sampling unit detection device and system - Google Patents
Transformer bushing live-line test sampling unit detection device and system Download PDFInfo
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- CN213843493U CN213843493U CN202022452359.6U CN202022452359U CN213843493U CN 213843493 U CN213843493 U CN 213843493U CN 202022452359 U CN202022452359 U CN 202022452359U CN 213843493 U CN213843493 U CN 213843493U
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Abstract
The utility model provides a transformer bushing live test sampling unit detection device and system relates to electricity technical field, can detect transformer bushing live test sampling unit, avoids bringing the potential safety hazard to the transformer bushing. A transformer bushing live test sampling unit detection device comprises an input interface, an input circuit and a single chip microcomputer; the input interface comprises a first interface, a second interface and a third interface; the first interface is connected with a disconnecting link black end of the transformer bushing live test sampling unit, the second interface is connected with a disconnecting link red end of the transformer bushing live test sampling unit, and the third interface is grounded; the output end of the input interface is connected with the input end of the input circuit, and the output end of the input circuit is connected with the single chip microcomputer.
Description
Technical Field
The utility model relates to an electricity technical field especially relates to a transformer bushing live test sampling unit detection device and system.
Background
With the development and improvement of the live detection technology of the primary equipment of the transformer substation, the live detection technology of the transformer bushing becomes an important means for evaluating the insulation state of the transformer bushing, and the traditional power failure pre-test mode is gradually replaced.
At present, a large number of transformer bushing live test sampling units are installed in each transformer substation, but no simple and convenient inspection measure is provided for the quality of installation at present, and in the installation process, due to errors of installation personnel, the situations of poor lead-out wiring or poor contact of an open-circuit protector often occur, so that after power transmission, live test data is invalid, and even potential safety hazards are brought to the transformer bushing.
SUMMERY OF THE UTILITY MODEL
The utility model provides a transformer bushing live test sampling unit detection device and system can detect transformer bushing live test sampling unit, avoids bringing the potential safety hazard to the transformer bushing.
In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:
in a first aspect, a transformer bushing live-line test sampling unit detection device is provided, which comprises an input interface, an input circuit and a single chip microcomputer; the input interface comprises a first interface, a second interface and a third interface; the first interface is connected with a disconnecting link black end of the transformer bushing live test sampling unit, the second interface is connected with a disconnecting link red end of the transformer bushing live test sampling unit, and the third interface is grounded; the output end of the input interface is connected with the input end of the input circuit, and the output end of the input circuit is connected with the single chip microcomputer.
Optionally, the single chip microcomputer is used for sampling data of the transformer bushing live test sampling unit.
Optionally, the transformer bushing live-line test sampling unit detection device further includes a display screen, a battery, and a keyboard; the display screen is connected with the output end of the single chip microcomputer, the keyboard is connected with the input end of the single chip microcomputer, and the battery is connected with the single chip microcomputer and the input circuit.
In a second aspect, a transformer bushing live-line test sampling unit detection system is provided, which comprises a transformer bushing live-line test sampling unit and the transformer bushing live-line test sampling unit detection device of the first aspect; the input interface of the transformer bushing live-line test sampling unit detection device is connected with the transformer bushing live-line test sampling unit
The embodiment of the utility model provides a transformer bushing live test sampling unit detection device and system, including input interface, input circuit and singlechip, input interface includes first interface, second interface and third interface. The first interface is connected with the black end of the disconnecting link of the transformer bushing live-line test sampling unit, the second interface is connected with the red end of the disconnecting link of the transformer bushing live-line test sampling unit, and the third interface is grounded. Can utilize single chip microcomputer control input interface and input circuit work to detect the electrified data that test on the sampling unit of transformer bushing, and then according to the data that detect, judge binding post, connection piece, protector, take a percentage and draw forth the end, draw down the cable and whether the earthing terminal contacts well, avoid bringing the potential safety hazard to the transformer bushing because of contact failure.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 these drawings without creative efforts.
Fig. 1 is a circuit diagram of a transformer bushing live test sampling unit provided in the prior art;
fig. 2 is a connection diagram of each circuit in the transformer bushing live-line test sampling unit detection device provided by the embodiment of the present invention;
fig. 3 is a circuit connection diagram of a transformer bushing live-line test sampling unit detecting system provided by an embodiment of the present invention.
Detailed Description
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 application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Unless otherwise defined, technical or scientific terms used in the embodiments of the present application should have the ordinary meaning as understood by those having ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar terms in the embodiments of the invention do not denote any order, quantity, or importance, but rather the embodiments are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. "upper," "lower," "left," "right," "horizontal," and "vertical" are used merely for relative terms as to the orientation of the elements in the drawings, and these directional terms are relative terms, which are used for descriptive and clarity relative to the elements and which can vary accordingly depending on the orientation in which the elements in the drawings are placed.
As shown in fig. 1, problems that may occur during the installation of the transformer bushing live-line test sampling unit at present are poor contact of a terminal, poor contact of a connecting sheet, a fault of a protector, poor contact of a tap leading-out terminal, a fault of a down-lead cable and poor grounding.
Based on this, the embodiment of the present invention provides a transformer bushing live-line test sampling unit detection device, as shown in fig. 2 and 3, including an input interface, an input circuit, and a single chip microcomputer; the input interface comprises a first interface, a second interface and a third interface; the first interface is connected with the black end of a disconnecting link of the transformer sleeve belt, the second interface is connected with the red end of the disconnecting link of the transformer sleeve belt, and the third interface is grounded; the output end of the input interface is connected with the input end of the input circuit, and the output end of the input circuit is connected with the single chip microcomputer.
The transformer bushing live-line test sampling unit comprises a disconnecting link, an end screen, a first protector, a second protector, an end screen tap and a down-leading cable. The switch comprises a switch black end and a switch red end, and the down-leading cable comprises a black line and a red line. The black end of the disconnecting link is electrically connected with the end screen tap and the end screen tap, and the red end of the disconnecting link is grounded. The first protector is respectively connected between the connecting sheet connected with the black end of the disconnecting link and the connecting sheet connected with the red end of the disconnecting link, the second protector is respectively connected between the black line and the red line, the black line is connected with the black end of the disconnecting link, and the red line is connected with the red end of the disconnecting link.
Before testing, the capacitance parameter of a down cable in the transformer bushing live-line test sampling unit, the ground capacitance nameplate parameter of a tail screen and the default parameter of a protector need to be set in advance.
Because the types of the red line and the black line are fixed, the capacitance values of the red line and the black line in unit length are also fixed, and the capacity parameters of the red line and the black line can be manually set according to the lengths of the red line and the black line.
Normally, the black line of the down cable is conductive to ground, i.e. the capacitance to ground of the first interface a should be 0. After the capacitance value between the first interface and the third interface AE is measured by the inspection device, the capacitance value is compared with 0, if the capacitance value is within an allowable error range, the black line is normally connected with the connecting sheet, otherwise, the black line is abnormally connected with the connecting sheet. If the black line is normally connected with the connecting sheet, the connecting terminal at the black end of the disconnecting link is normal, and the connecting sheet connected with the black end of the disconnecting link is normal.
Under normal conditions, a red line in the down-lead cable is conducted with the ground, after the capacitance between the second interface BE and the third interface BE is measured by the transformer bushing live-line test sampling unit inspection device, the capacitance between the end screen tap and the ground can BE obtained by automatically calculating and subtracting the preset cable capacity, the capacitance is compared with the ground capacitance nameplate parameter of the end screen, if the capacitance is within an allowable error range, the red line is normally connected with the connecting sheet, otherwise, the red line is abnormally connected with the connecting sheet. If the red line is normally connected with the connecting sheet, the connecting terminal at the red end of the disconnecting link is normal, and the connecting sheet connected with the red end of the disconnecting link is normal. Meanwhile, if the capacitance between the end screen tap and the ground is within the error allowable range, the tap leading-out terminal is normally contacted, and the grounding terminal is normally contacted.
Because the first protector and the second protector are in fixed specifications, voltage drops at two ends of the first protector and the second protector are both fixed values V1 and V2, after the voltage drop between the first interface and the second interface AB is measured by the transformer bushing live test sampling unit inspection device, the voltage drop value is compared with V1+ V2, if the voltage drop value is within an allowable error range, the first protector and the second protector are normal, otherwise, the first protector and the second protector are abnormal.
Any of the error ranges can be set according to the experience of the worker.
In some embodiments, the single-chip microcomputer may BE used to sample data of the transformer bushing strip, for example, the single-chip microcomputer is used to control the capacitance between the input circuit and the input interface, the first interface and the third interface AE, and the second interface and the third interface BE.
On the basis, the singlechip can be used for carrying out digital-to-analog conversion on the sampled data, selecting an intelligent measuring range and the like.
In some embodiments, the transformer bushing live test sampling unit detection device further comprises a display screen, a battery, and a keyboard; the display screen is connected with the output end of the single chip microcomputer, the keyboard is connected with the input end of the single chip microcomputer, and the battery is connected with the single chip microcomputer and the input circuit.
The battery can be used for supplying power to the input circuit and the singlechip; the data measured by the single chip microcomputer can be displayed on the display screen.
The embodiment of the utility model provides a transformer bushing live test sampling unit detection device, including input interface, input circuit and singlechip, input interface includes first interface, second interface and third interface. The first interface is connected with the black end of the disconnecting link of the transformer bushing live-line test sampling unit, the second interface is connected with the red end of the disconnecting link of the transformer bushing live-line test sampling unit, and the third interface is grounded. Can utilize single chip microcomputer control input interface and input circuit work to detect the electrified data that test on the sampling unit of transformer bushing, and then according to the data that detect, judge binding post, connection piece, protector, take a percentage and draw forth the end, draw down the cable and whether the earthing terminal contacts well, avoid bringing the potential safety hazard to the transformer bushing because of contact failure.
As shown in fig. 3, the embodiment of the utility model provides a still provide a transformer bushing live test sampling unit detecting system, including transformer bushing live test sampling unit and aforementioned arbitrary embodiment transformer bushing live test sampling unit detecting device. The input interface of the transformer bushing live-line test sampling unit detection device is connected with the transformer bushing live-line test sampling unit.
The explanation of the transformer bushing live-line test sampling unit detection system is the same as that of the transformer bushing live-line test sampling unit detection device, and is not repeated herein.
The embodiment of the utility model provides a still provide a transformer bushing electrified test sampling unit detecting system, including transformer bushing electrified test sampling unit and aforementioned arbitrary embodiment transformer bushing electrified test sampling unit detection device. The transformer bushing live-line test sampling unit detection device comprises an input interface, an input circuit and a single chip microcomputer, wherein the input interface comprises a first interface, a second interface and a third interface. The first interface is connected with the black end of the disconnecting link of the transformer bushing live-line test sampling unit, the second interface is connected with the red end of the disconnecting link of the transformer bushing live-line test sampling unit, and the third interface is grounded. Can utilize single chip microcomputer control input interface and input circuit work to detect the electrified data that test on the sampling unit of transformer bushing, and then according to the data that detect, judge binding post, connection piece, protector, take a percentage and draw forth the end, draw down the cable and whether the earthing terminal contacts well, avoid bringing the potential safety hazard to the transformer bushing because of contact failure.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A transformer bushing live test sampling unit detection device is characterized by comprising an input interface, an input circuit and a single chip microcomputer;
the input interface comprises a first interface, a second interface and a third interface; the first interface is connected with a disconnecting link black end of the transformer bushing live test sampling unit, the second interface is connected with a disconnecting link red end of the transformer bushing live test sampling unit, and the third interface is grounded;
the output end of the input interface is connected with the input end of the input circuit, and the output end of the input circuit is connected with the single chip microcomputer.
2. The transformer bushing live-line test sampling unit detection device of claim 1, wherein the single chip microcomputer is used for performing data sampling on the transformer bushing live-line test sampling unit.
3. The transformer bushing live-test sampling unit detection device according to claim 1 or 2, wherein the transformer bushing live-test sampling unit detection device further comprises a display screen, a battery, and a keyboard;
the display screen is connected with the output end of the single chip microcomputer, the keyboard is connected with the input end of the single chip microcomputer, and the battery is connected with the single chip microcomputer and the input circuit.
4. A transformer bushing live-line test sampling unit detection system is characterized by comprising a transformer bushing live-line test sampling unit and a transformer bushing live-line test sampling unit detection device according to any one of claims 1 to 3;
and the input interface of the transformer bushing live test sampling unit detection device is connected with the transformer bushing live test sampling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022452359.6U CN213843493U (en) | 2020-10-29 | 2020-10-29 | Transformer bushing live-line test sampling unit detection device and system |
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| CN202022452359.6U CN213843493U (en) | 2020-10-29 | 2020-10-29 | Transformer bushing live-line test sampling unit detection device and system |
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| CN213843493U true CN213843493U (en) | 2021-07-30 |
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| CN202022452359.6U Active CN213843493U (en) | 2020-10-29 | 2020-10-29 | Transformer bushing live-line test sampling unit detection device and system |
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