CN216411446U - On-line monitoring sensor for air-core reactor - Google Patents
On-line monitoring sensor for air-core reactor Download PDFInfo
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- CN216411446U CN216411446U CN202123038322.XU CN202123038322U CN216411446U CN 216411446 U CN216411446 U CN 216411446U CN 202123038322 U CN202123038322 U CN 202123038322U CN 216411446 U CN216411446 U CN 216411446U
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Abstract
The application relates to the technical field of power electronic equipment, in particular to an on-line monitoring sensor for an air-core reactor; the on-line monitoring sensor includes: 2 opposite-winding air-core coils L1-L2 and a pointing device, wherein the air-core coil L1 is connected in series with the air-core coil L2, and a node where one end of the air-core coil L1 and one end of the air-core coil L2 are connected in common forms a reference terminal, the reference terminal is connected with the pointing device, the pointing device comprises: a differential amplifier having one end connected to the other end of the air-core coil L1 and one end connected to the other end of the air-core coil L2; the problems of large investment, complex installation, obvious interference and the like in the development of the on-line monitoring work of the air reactor are solved.
Description
Technical Field
The application relates to the technical field of power electronic equipment, in particular to an online monitoring sensor for an air-core reactor.
Background
Air core reactors are inductive high voltage electrical appliances in power systems for limiting short circuit currents, reactive compensation and phase shift. In the actual operation process, the insulation between turns is burnt out due to the occurrence of insulation faults. The turn-to-turn insulation fault of the air-core reactor is usually at a certain point position of a circumference in a certain vertical height direction, magnetic field abnormity can be caused in the vertical direction and the horizontal direction, and particularly, the magnetic field is easy to generate an extremely unstable phenomenon in the period of the turn-to-turn insulation breakdown critical point, so that the change of a coupling electric field is caused.
However, if the air reactor on-line monitoring work is carried out, the problems of large investment, complex installation, obvious interference and the like are faced, so that the operation and maintenance environment for detecting the abnormity of the air reactor is always in a state mainly including a power failure test.
SUMMERY OF THE UTILITY MODEL
The application provides an on-line monitoring sensor for an air reactor to solve the problems of large investment, complex installation, obvious interference and the like in the process of carrying out on-line monitoring work of the air reactor.
The embodiment of the application is realized as follows:
the embodiment of the application provides an on-line monitoring sensor for air-core reactor, includes: 2 opposite-winding air-core coils L1-L2 and a pointing device, wherein the air-core coil L1 is connected in series with the air-core coil L2, and a node where one end of the air-core coil L1 and one end of the air-core coil L2 are connected in common forms a reference terminal, the reference terminal is connected with the pointing device, the pointing device comprises: and one end of the differential amplifier is connected with the other end of the air-core coil L1, and one end of the differential amplifier is connected with the other end of the air-core coil L2.
In some embodiments, the indicating device further comprises an LED indicator light and a buzzer, the LED indicator light and the buzzer being connected in parallel to the other end of the differential amplifier.
In some embodiments, the air core coil L1 and the air core coil L2 are stacked, and the air core coil L1 and the air core coil L2 are fixed by epoxy.
The beneficial effects of the embodiment of the application include: monitoring the abnormity of the air reactor through two air-core coils L1-L2 in a laminated structure, and performing acousto-optic early warning by an indicating device according to abnormity information obtained by monitoring; the application provides an on-line monitoring sensor for air-core reactor, has simple structure, and the interference killing feature is strong, and the reliability is high, and self-diagnostic capability is strong, characteristics such as with low costs.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 shows a schematic circuit diagram of an on-line monitoring sensor for an air-core reactor according to an embodiment of the present application;
fig. 2 shows a schematic diagram of an indicating device in an online monitoring sensor for an air-core reactor according to an embodiment of the application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the product conventionally places when used, and are only used for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Fig. 1 shows a schematic circuit diagram of an online monitoring sensor for an air-core reactor according to an embodiment of the present application.
The application provides an on-line monitoring sensor for air-core reactor, includes: 2 opposite-winding air-core coils L1-L2 and a pointing device, wherein the air-core coil L1 is connected in series with the air-core coil L2, and a node where one end of the air-core coil L1 and one end of the air-core coil L2 are connected in common forms a reference terminal, the reference terminal is connected with the pointing device, the pointing device comprises: and one end of the differential amplifier is connected with the other end of the air-core coil L1, and one end of the differential amplifier is connected with the other end of the air-core coil L2.
In some embodiments, the air core coil L1 and the air core coil L2 are stacked, and the air core coil L1 and the air core coil L2 are fixed by epoxy.
The air-core coil L1 and the air-core coil L2 are stacked in the vertical direction, and the air-core coils L1-L2 are vertically installed in the air-core reactor or concentrically below the air-core reactor. The air-core coil L1 is connected with the air-core coil L2 in series, the voltage obtained by the two air-core coils connected in series is 2 times of that of a single air-core coil, and when the winding of the air-core reactor to be detected breaks down, the voltage obtained is no longer 2 times of that of the single air-core coil due to the fact that magnetic fields induced by the two air-core coils are uneven; a node at which one end of the air-core coil L1 (i.e., the end of the air-core coil L1) and one end of the air-core coil L2 (i.e., the head end of the air-core coil L2) are connected in series forms a reference terminal, the other end of the air-core coil L1 (i.e., the head end of the air-core coil L1) and the other end of the air-core coil L2 (i.e., the end of the air-core coil L2) serve as signal monitoring terminals, and the reference terminal is connected to the indicating device.
In some embodiments, the supporting structure of the air-core coil L1 and the air-core coil L2 is a silicon steel sheet, a high-frequency magnetic core, or a hollow plastic skeleton, and the air-core coil L1 and the air-core coil L2 are fixed by epoxy resin, so as to avoid generating an interference magnetic field.
Fig. 2 shows a schematic diagram of an indicating device in an online monitoring sensor for an air-core reactor according to an embodiment of the application.
In some embodiments, the indicating device further comprises an LED indicator light and a buzzer, the LED indicator light and the buzzer being connected in parallel to the other end of the differential amplifier.
The signal monitoring end is connected with the differential amplifier, the head end of the air-core coil L1 is connected with the differential amplifier, the tail end of the air-core coil L2 is connected with the differential amplifier, the differential amplifier obtains a difference signal output by the air-core coil L1-L2, the difference signal is reminded by the LED indicator light which is connected with the differential amplifier in series, and the buzzer which is connected with the differential amplifier in series gives an alarm or gives an early warning.
The application provides an operating principle that is used for air-core reactor's on-line monitoring sensor is: the air core reactor to be tested is monitored through the air core coils which are oppositely wound and are arranged in a laminated mode, if the air core reactor breaks down, the magnetic field coupled to the air core coils is abnormal (namely, unstable phenomenon), and the indicating device carries out acousto-optic early warning on the abnormal magnetic field.
The method has the advantages that the abnormity of the air reactor is monitored through the two air-core coils L1-L2 in the laminated structure, and the indicating device performs acousto-optic early warning according to the abnormity information obtained through monitoring; the application provides an on-line monitoring sensor for air-core reactor, has simple structure, and the interference killing feature is strong, and the reliability is high, and self-diagnostic capability is strong, characteristics such as with low costs.
Reference throughout this specification to "embodiments," "some embodiments," "one embodiment," or "an embodiment," etc., means that a particular feature, component, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in at least one other embodiment," or "in an embodiment," or the like, throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, components, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, without limitation, a particular feature, component, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with a feature, component, or characteristic of one or more other embodiments. Such modifications and variations are intended to be included within the scope of the present application.
It is to be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. An on-line monitoring sensor for an air-core reactor, comprising:
2 opposite-winding air-core coils L1-L2 and a pointing device, wherein the air-core coil L1 is connected in series with the air-core coil L2, and a node where one end of the air-core coil L1 and one end of the air-core coil L2 are connected in common forms a reference terminal, the reference terminal is connected with the pointing device, the pointing device comprises: and one end of the differential amplifier is connected with the other end of the air-core coil L1, and one end of the differential amplifier is connected with the other end of the air-core coil L2.
2. An on-line monitoring sensor for an air-core reactor as claimed in claim 1, wherein the indicating means further comprises an LED indicator light and a buzzer, the LED indicator light and the buzzer being connected in parallel to the other end of the differential amplifier.
3. The on-line monitoring sensor for the air core reactor as claimed in claim 1, wherein the air core coil L1 and the air core coil L2 are arranged in a laminated manner, and the air core coil L1 and the air core coil L2 are fixed by epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123038322.XU CN216411446U (en) | 2021-12-06 | 2021-12-06 | On-line monitoring sensor for air-core reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123038322.XU CN216411446U (en) | 2021-12-06 | 2021-12-06 | On-line monitoring sensor for air-core reactor |
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| Publication Number | Publication Date |
|---|---|
| CN216411446U true CN216411446U (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123038322.XU Active CN216411446U (en) | 2021-12-06 | 2021-12-06 | On-line monitoring sensor for air-core reactor |
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| CN (1) | CN216411446U (en) |
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2021
- 2021-12-06 CN CN202123038322.XU patent/CN216411446U/en active Active
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