CN210401499U - Sleeve monitoring device for transformer and transformer sleeve device - Google Patents
Sleeve monitoring device for transformer and transformer sleeve device Download PDFInfo
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- CN210401499U CN210401499U CN201920678195.3U CN201920678195U CN210401499U CN 210401499 U CN210401499 U CN 210401499U CN 201920678195 U CN201920678195 U CN 201920678195U CN 210401499 U CN210401499 U CN 210401499U
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- transformer bushing
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Abstract
The utility model provides a sleeve pipe monitoring devices and transformer bushing device for transformer, include and set up to the electric capacity group of being connected with transformer bushing G, the tie point of two adjacent electric capacities in electric capacity group is as the interface of voltage transformer bushing G's monitoring voltage, owing to designed electric capacity group, through electric capacity group, the change voltage signal of picking up voltage transformer bushing G has been formed, no longer through electric capacity and induction coil formation pick up the change current signal of voltage transformer bushing G, consequently, the monitoring precision to transformer bushing has been improved.
Description
Technical Field
The utility model relates to a sleeve pipe monitoring devices and transformer bushing apparatus, especially a sleeve pipe monitoring devices and transformer bushing apparatus for transformer.
Background
The transformer is an important pivotal device in a power system, along with the increase of capacity and quantity and the enlargement of power grid scale, a transformer bushing guides high and low voltage leads inside the transformer to the outside of an oil tank, not only serves as lead wire for insulation against the ground, but also plays a role of a fixed lead wire, the transformer bushing is one of current-carrying elements of the transformer, and during the operation of the transformer, load current passes for a long time, and when short circuit occurs outside the transformer, short circuit current passes. The bushing must have a predetermined electrical strength and a sufficient mechanical strength, have a good thermal stability, and can endure instantaneous overheating during short circuit, and in order to detect the operating state of the bushing, it is necessary to collect signals inside the bushing, so that a bushing monitoring device and a transformer bushing device for a transformer, in which a method of detecting current is adopted, are important transformer components, as shown in fig. 2: typically comprising a capacitor C1And an induction coil T, a capacitor C1Is arranged to be connected to one of the ends of a transformer bushing G, the other end of which is arranged to be connected to the phase voltage U0Connection, capacitance C1Is arranged to be connected to one of the terminals of the primary coil of the induction coil T, the other terminal of the primary coil of the induction coil T is arranged to be connected to ground, the output current I of the secondary coil of the induction coil TCFor the monitoring current of transformer bushing G, because the measuring current is small and generally milliampere level, sometimes the bushing generates small partial discharge and is not easy to measure, the product accuracy is not high, thereby influencing the monitoring accuracy of the transformer bushing.
Disclosure of Invention
The object of the utility model is a bushing monitoring device for a transformer,
the object of the utility model is a transformer bushing device.
In order to overcome the technical defect, the utility model aims at providing a sleeve pipe monitoring devices and transformer bushing device for transformer has consequently improved the monitoring precision to the transformer bushing.
In order to achieve the purpose, the utility model adopts the technical proposal that: a bushing monitoring device for a transformer comprises a capacitor bank connected with a transformer bushing G, and the connection point of two adjacent capacitors in the capacitor bank is used as an interface of the monitoring voltage of the voltage transformer bushing G.
Due to the fact that the capacitor bank is designed, the variable voltage signal of the voltage transformer bushing G is picked up through the capacitor bank, the variable current signal of the voltage transformer bushing G is not picked up through the capacitor and the induction coil, and therefore monitoring accuracy of the transformer bushing is improved.
The utility model discloses a, according to the mode of picking up transformer bushing G's change voltage signal be connected electric capacity group and voltage transformer bushing G.
The utility model discloses a, realize picking up voltage signal's mode integrated capacitor group according to the series connection branch road that two at least electric capacity are constituteed.
The utility model relates to a, wherein have electric capacity C1And a capacitor C2The capacitor bank of (1).
The utility model designs, an electric capacity C1Is arranged to be connected to one of the ends of a transformer bushing G, the other end of which is arranged to be connected to the phase voltage U0Connection, capacitance C1Is arranged to interface with the capacitor C2One of the interface connections of (1), capacitor C2Is arranged to be connected to ground, a capacitor C1And a capacitor C2Output voltage U of the connection point betweenCSet to the monitored voltage of the voltage transformer bushing G.
The utility model discloses a, a transformer bushing apparatus includes the sleeve pipe that the voltage that has the electric capacity group was taken a percentage.
The technical effects of the utility model reside in that: the existing method for detecting the end screen terminal signal of the bushing is changed from a measuring current signal to a measuring voltage signal, and the existing method for detecting the end screen terminal signal of the bushing is changed from a measuring current signal to a measuring voltage signal. The voltage signal measured by the voltage signal is larger, the sensitivity is greatly improved, so that the running state of the sleeve can be accurately judged, and the voltage value can be accurately measured by adopting a high-sensitivity capacitor. The voltage values are: 100 supplyes 1000V, the utility model discloses the glass steel dry-type transformer sleeve pipe that the electrified voltage was taken a percentage not only can accurate sheathed tube inside structural damage degree, can judge specific position moreover.
In the technical scheme, the capacitor bank for picking up the variable voltage signal of the transformer bushing G is an important technical characteristic, and has novelty, creativity and practicability in the technical fields of the bushing monitoring device for the transformer and the transformer bushing device, and the terms in the technical scheme can be explained and understood by the patent documents in the technical field.
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 bushing monitoring device for a transformer according to the present invention,
fig. 2 is a circuit diagram of the technical background of the present invention.
Detailed Description
Terms such as "having," "including," and "comprising," as used herein with respect to the present invention, are to be understood as not specifying the presence or addition of one or more other elements or combinations thereof.
In the description of the present invention, 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, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 invention can be understood in specific cases to those skilled in the art.
In addition, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other, and unless otherwise specified, the equipment and materials used in the following examples are commercially available, and if the processing conditions are not specified, please refer to the purchased product specification or follow the conventional method in the art.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only 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.
A sleeve pipe monitoring devices for transformer, figure 1 is the utility model discloses a first embodiment, combine the figure to explain specifically this embodiment, include electric capacity C1And a capacitor C2CapacitorC1Is arranged to be connected to one of the ends of a transformer bushing G, the other end of which is arranged to be connected to the phase voltage U0Connection, capacitance C1Is arranged to interface with the capacitor C2One of the interface connections of (1), capacitor C2Is arranged to be connected to ground, a capacitor C1And a capacitor C2Output voltage U of the connection point betweenCSet to the monitored voltage of the voltage transformer bushing G.
Handle capacitor C1And a capacitor C2After being connected in series, the capacitor C1The external interface is connected with a transformer sleeve G to connect a capacitor C2Is connected to ground when the phase voltage U is equal to0When the power supply connector is connected with the transformer bushing G, the transformer bushing G and the capacitor C are enabled to be connected1And a capacitor C2Connected in series in a power supply, when current passes through a transformer bushing G and a capacitor C1And a capacitor C2At the capacitor C1And a capacitor C2The connection point between them forms the output voltage UCOutput voltage UCAs a monitored voltage of the voltage transformer bushing G.
The utility model discloses a second embodiment, according to the mode of picking up transformer bushing G's change voltage signal be connected electric capacity group and voltage transformer bushing G.
In this embodiment, the capacitor bank is integrated in such a way that a series branch consisting of at least two capacitors realizes the pickup of the voltage signal.
The second embodiment of the present invention is based on the first embodiment.
A transformer bushing device comprises a capacitor C1And a capacitor C2The bushing of the voltage tap of (1).
The utility model has the characteristics of down:
1. due to the fact that the capacitor bank is designed, the variable voltage signal of the voltage transformer bushing G is picked up through the capacitor bank, the variable current signal of the voltage transformer bushing G is not picked up through the capacitor and the induction coil, and therefore monitoring accuracy of the transformer bushing is improved.
2. Due to the design of the capacitor C1And a capacitor C2Realize the output voltage UC100-1000V.
3. Due to the design of the capacitor C1And a capacitor C2And an induction coil T is not used any more, so that the safety performance is improved.
4. Due to the design of the capacitor C1And a capacitor C2And the installation space is simplified.
5. Owing to designed the utility model discloses a technical characteristic, in technical characteristic's the effect alone and mutual set, through experimental demonstration, the utility model discloses an each item performance index is 1.7 times at least for current each item performance index, has fine market value through the aassessment.
Other technical features identical or similar to those of the capacitor bank for picking up the varying voltage signal of the transformer bushing G are one of the embodiments of the present invention, and the technical features of the above-described embodiments can be combined arbitrarily, and in order to meet the requirements of patent laws, patent implementation rules and examination guidelines, all possible combinations of the technical features of the above-described embodiments are not described again.
Therefore in the sleeve pipe monitoring devices and the transformer bushing device technical field for the transformer, all include and set up to the electric capacity group of being connected with transformer bushing G, the technical content of the tie point of two adjacent electric capacities in electric capacity group as the interface of the monitoring voltage of voltage transformer bushing G is all in the utility model discloses a within the scope of protection.
Claims (4)
1. A sleeve pipe monitoring devices for transformer, characterized by: comprises a capacitor bank connected with the transformer bushing G, the connection point of two adjacent capacitors in the capacitor bank is used as an interface of the monitoring voltage of the voltage transformer bushing G,
the capacitor bank is connected to the voltage transformer bushing G in such a way that it picks up the varying voltage signal of the transformer bushing G,
the capacitor bank is integrated in a way that a series branch consisting of at least two capacitors realizes the pickup of voltage signals.
2. The bushing monitoring device for a transformer as claimed in claim 1, wherein: therein having a capacitance C1And a capacitor C2The capacitor bank of (1).
3. The bushing monitoring device for a transformer as claimed in claim 1, wherein: capacitor C1Is arranged to be connected to one of the ends of a transformer bushing G, the other end of which is arranged to be connected to the phase voltage U0Connection, capacitance C1Is arranged to interface with the capacitor C2One of the interface connections of (1), capacitor C2Is arranged to be connected to ground, a capacitor C1And a capacitor C2Output voltage U of the connection point betweenCSet to the monitored voltage of the voltage transformer bushing G.
4. The transformer bushing device is characterized in that: bushing monitoring device comprising a capacitor bank according to any of claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920678195.3U CN210401499U (en) | 2019-05-13 | 2019-05-13 | Sleeve monitoring device for transformer and transformer sleeve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920678195.3U CN210401499U (en) | 2019-05-13 | 2019-05-13 | Sleeve monitoring device for transformer and transformer sleeve device |
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| Publication Number | Publication Date |
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| CN210401499U true CN210401499U (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920678195.3U Active CN210401499U (en) | 2019-05-13 | 2019-05-13 | Sleeve monitoring device for transformer and transformer sleeve device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117368621A (en) * | 2023-12-06 | 2024-01-09 | 南方电网科学研究院有限责任公司 | Casing state monitoring method and device, storage medium and computer equipment |
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2019
- 2019-05-13 CN CN201920678195.3U patent/CN210401499U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117368621A (en) * | 2023-12-06 | 2024-01-09 | 南方电网科学研究院有限责任公司 | Casing state monitoring method and device, storage medium and computer equipment |
| CN117368621B (en) * | 2023-12-06 | 2024-02-23 | 南方电网科学研究院有限责任公司 | Casing state monitoring method and device, storage medium and computer equipment |
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