CN213600769U - High-voltage current metering device in box transformer substation and box transformer substation with same - Google Patents
High-voltage current metering device in box transformer substation and box transformer substation with same Download PDFInfo
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- CN213600769U CN213600769U CN202021539085.8U CN202021539085U CN213600769U CN 213600769 U CN213600769 U CN 213600769U CN 202021539085 U CN202021539085 U CN 202021539085U CN 213600769 U CN213600769 U CN 213600769U
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Abstract
The utility model relates to a high tension current metering device in case becomes and case that has this high tension current metering device becomes, its characterized in that: the method comprises the following steps: the high-voltage transformer comprises a high-voltage bushing, a first conductor and an insulator, wherein the insulator is coated outside the first conductor; and the current transformer is sleeved on the outer side of the high-voltage bushing and used for metering the high-voltage current input into the transformer. The box transformer substation with the high-voltage current metering device is further disclosed. The current transformer is sleeved on the high-voltage sleeve, so that the current transformer can measure the high-voltage current input into the transformer from the high-voltage chamber, the installation volume is reduced, the current transformer is arranged on a high-voltage panel of the transformer through a support, the space utilization rate of the transformer is improved, and the current transformer is simple in structure, convenient to install and accurate in measurement.
Description
Technical Field
The utility model relates to a device of high tension current measurement is realized to new forms of energy case becomes interior, provides a case becomes with this high tension current metering device simultaneously.
Background
With the development of new energy (photovoltaic, wind power) industry, new energy boxes with 35KV voltage level become more and more widely used. For equipment safety considerations of the substation, the load current on the high and low voltage sides needs to be monitored. Because the load side of the new energy box transformer substation is a high-voltage system, a high-voltage current transformer is generally used for metering; however, several special current transformers for measuring 35KV high-voltage current used in the existing box transformer are all of fully-closed strut type structures, the volume is large (the length, width and height are respectively more than 500 mm), the weight of each current transformer reaches 40Kg, and the total weight of each current transformer can reach 120 Kg.
Because current transformer is bulky and weight is heavy, install it and can cause the influence to box wall intensity on the box wall that the case becomes, and the space can obviously increase, is unfavorable for installing on the case becomes the casing on the new forms of energy. Therefore, the current transformer is installed in the incoming line cabinet, the high-voltage bushing is installed on a high-voltage panel of the transformer, 3 phases of electricity output by the high-voltage chamber are respectively connected with the input end of the current transformer through the electric conductor, the output end of the current transformer is connected with the input end of the high-voltage bushing through the electric conductor, the output end of the high-voltage bushing is connected with the transformer, and the current transformer can measure high-voltage current through the connecting structure. However, the number of the current transformers in the installation structure is 3, the occupied area is large, the current transformers are additionally connected through conductors, and the installation is complex. Further improvements are therefore desirable.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the first technical problem to provide a high tension current metering device in the case becomes that the installation is small and the installation is simple to the current situation of prior art.
The utility model discloses the second technical problem that will solve is to prior art's current situation, provides a case becomes with above-mentioned high tension current metering device.
The utility model provides a technical scheme that above-mentioned first technical problem adopted does: a high-voltage current metering device in a box transformer substation is used for metering high-voltage current input into a transformer from a high-voltage chamber in the box transformer substation, and is characterized in that: the method comprises the following steps:
the high-voltage transformer comprises a high-voltage bushing, a first conductor and an insulator, wherein the insulator is coated outside the first conductor;
and the current transformer is sleeved on the outer side of the high-voltage bushing and used for metering the high-voltage current input into the transformer.
Specifically, the high-voltage bushing comprises a hollow pipe body and a circular ring extending along the vertical direction of the hollow pipe body in the circumferential direction, the first electric conductor is arranged in the hollow pipe body, and the hollow pipe body and the circular ring are insulators.
In the scheme, the high-voltage bushings are multiple and are respectively arranged on the high-voltage panel of the transformer at equal intervals.
The current transformer comprises a circular iron core and a coil wound on the periphery of the iron core, and the iron core is sleeved outside the high-voltage sleeve.
In order to fix the current transformer conveniently, the current transformer fixing device further comprises a bracket for fixing the current transformer, and the bracket is used for fixing the current transformer on a high-voltage panel of the transformer.
And the output end of the current transformer is also connected with a display device for displaying the metered high-voltage current.
Preferably, the display device is a display screen or a terminal with a display function.
Preferably, the transformer is an oil-immersed transformer.
The utility model provides a technical scheme that above-mentioned second technical problem adopted does: the utility model provides a box becomes, includes high-voltage chamber, low-voltage chamber and locates the transformer between high-voltage chamber and the low-voltage chamber, its characterized in that: the high-voltage current metering device is further included.
The other end of the transformer is also provided with a low-voltage sleeve, a second conductor is arranged in the low-voltage sleeve, the output end of the transformer is connected with one end of the second conductor, and the other end of the second conductor is connected with the input end of the low-voltage chamber.
Compared with the prior art, the utility model has the advantages of: the current transformer is sleeved on the high-voltage sleeve, so that the current transformer can measure the high-voltage current input into the transformer from the high-voltage chamber, the installation volume is reduced, the current transformer is arranged on a high-voltage panel of the transformer through a support, the space utilization rate of the transformer is improved, and the current transformer is simple in structure, convenient to install and accurate in measurement.
Drawings
Fig. 1 is a schematic structural view of a box-type substation part in an embodiment of the present invention;
fig. 2 is another view structure diagram of the box-type substation according to the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of the assembly of a high voltage bushing and a current transformer in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 to 3, a high-voltage current metering device in a box transformer substation for metering a high-voltage current input from a high-voltage chamber into a transformer 5 in the box transformer substation includes:
the high-voltage transformer comprises a high-voltage bushing 1, wherein a first conductor and an insulator coated outside the first conductor are arranged in the high-voltage bushing 1, one end of the first conductor is connected with the output end of a high-voltage chamber, and the other end of the first conductor is connected with the input end of the transformer;
and the current transformer 2 is sleeved outside the high-voltage bushing 1 and used for metering the high-voltage current input into the transformer.
The high-voltage bushing 1 has to meet the insulation requirements of corresponding voltage classes, and the withstand voltage meets the national standard. Wherein, the purpose of the ring of extending along the vertical direction circumference of cavity body is to increase insulating nature and creepage distance.
In general, a plurality of high-voltage bushings 1 are provided on the high-voltage panel 4 of the transformer 5 at equal intervals. In this embodiment, since the high voltage chamber outputs three-phase power, the number of the high voltage bushings 1 is 3, and the high voltage bushings are respectively transversely arranged on the high voltage panel 4 of the transformer 5 at equal intervals.
In order to reduce the volume of the high-voltage current metering device and improve the space utilization rate of the transformer, in this embodiment, the current transformer 2 comprises a circular iron core and a coil wound on the periphery of the iron core, wherein the coil and the iron core of the current transformer 2 which are generally used are all encapsulated by an insulating material, the current transformer 2 with the existing structure can be adopted, and the iron core is sleeved outside the high-voltage bushing 1. In addition, a bracket 3 for fixing the current transformer 2 is further included for fixing the current transformer 2 on a high voltage panel 4 of a transformer 5. In this embodiment, the transformer 5 is an oil-immersed transformer, so that the current transformer 2 can be directly fixed on an oil tank of the transformer 5, and the installation space of the current transformer 2 is greatly reduced.
The output end of the current transformer 2 is also connected with a display device (not shown in the figure) for displaying the metered high-voltage current. The display device is a display screen or a terminal with a display function. The user can view the high-voltage current measured by the current transformer 2 through the display device.
In the high-voltage current metering device, the current transformer 2 is sleeved outside the high-voltage bushing 1, so that the metering of the high-voltage current can be realized, the installation volume of the high-voltage current metering device is reduced,
a box transformer comprises a high-voltage chamber, a low-voltage chamber, a transformer 5 arranged between the high-voltage chamber and the low-voltage chamber, and the high-voltage current metering device.
The other end of the transformer 5 is further provided with a low-voltage bushing (not shown in the figure), a second conductor is arranged in the low-voltage bushing, the output end of the transformer is connected with one end of the second conductor, and the other end of the second conductor is connected with the input end of the low-voltage chamber.
The current transformer 2 in the high-voltage current metering device is small in size, the occupied area can be reduced, the installation is convenient, and the current metering of 35KV voltage level can be realized.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A high-voltage current metering device in a box transformer substation is used for metering high-voltage current input into a transformer from a high-voltage chamber in the box transformer substation, and is characterized in that: the method comprises the following steps:
the high-voltage transformer comprises a high-voltage bushing, a first conductor and an insulator, wherein the insulator is coated outside the first conductor;
and the current transformer is sleeved on the outer side of the high-voltage bushing and used for metering the high-voltage current input into the transformer.
2. A high-voltage current metering device according to claim 1, characterized in that: the high-voltage bushing comprises a hollow pipe body and a circular ring extending along the vertical direction of the hollow pipe body in the circumferential direction, the first conductor is arranged in the hollow pipe body, and the hollow pipe body and the circular ring are insulators.
3. A high-voltage current metering device according to claim 2, characterized in that: the high-voltage bushings are arranged on the high-voltage panel of the transformer at equal intervals.
4. A high-voltage current metering device according to claim 1, characterized in that: the current transformer comprises a circular iron core and a coil wound on the periphery of the iron core, and the iron core is sleeved outside the high-voltage sleeve.
5. A high-voltage current metering device according to claim 1, characterized in that: the transformer is characterized by further comprising a support for fixing the current transformer, and the support is used for fixing the current transformer on a high-voltage panel of the transformer.
6. A high-voltage current metering device according to claim 1, characterized in that: and the output end of the current transformer is also connected with a display device for displaying the metered high-voltage current.
7. The high-voltage current metering device according to claim 6, wherein: the display device is a display screen or a terminal with a display function.
8. A high-voltage current metering device according to claim 1, characterized in that: the transformer is an oil-immersed transformer.
9. The utility model provides a box becomes, includes high-voltage chamber, low-voltage chamber and locates the transformer between high-voltage chamber and the low-voltage chamber, its characterized in that: the high-voltage current metering device of any one of claims 1 to 8.
10. The box transformer substation of claim 9, wherein: the other end of the transformer is also provided with a low-voltage sleeve, a second conductor is arranged in the low-voltage sleeve, the output end of the transformer is connected with one end of the second conductor, and the other end of the second conductor is connected with the input end of the low-voltage chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021539085.8U CN213600769U (en) | 2020-07-29 | 2020-07-29 | High-voltage current metering device in box transformer substation and box transformer substation with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021539085.8U CN213600769U (en) | 2020-07-29 | 2020-07-29 | High-voltage current metering device in box transformer substation and box transformer substation with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213600769U true CN213600769U (en) | 2021-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021539085.8U Active CN213600769U (en) | 2020-07-29 | 2020-07-29 | High-voltage current metering device in box transformer substation and box transformer substation with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213600769U (en) |
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2020
- 2020-07-29 CN CN202021539085.8U patent/CN213600769U/en active Active
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Address after: 315031 No.17 and 22 Fenglin Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province Patentee after: Ningbo Aokes Intelligent Technology Co.,Ltd. Address before: 315031 No.17 and 22 Fenglin Road, Cicheng Town, Jiangbei District, Ningbo City, Zhejiang Province Patentee before: NINGBO AUX HIGH TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |