CN217061742U - Tubular bus bin with voltage and current transformer - Google Patents
Tubular bus bin with voltage and current transformer Download PDFInfo
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- CN217061742U CN217061742U CN202122936827.1U CN202122936827U CN217061742U CN 217061742 U CN217061742 U CN 217061742U CN 202122936827 U CN202122936827 U CN 202122936827U CN 217061742 U CN217061742 U CN 217061742U
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Abstract
A pipe bus bin with a voltage current transformer comprises a bin body used for being filled with insulating gas and at least one conductor arranged in the bin body, connecting flanges are arranged at two ends of the bin body respectively, an insulating core body is wrapped outside the conductor, a plurality of capacitive screens which are arranged alternately with the insulating layer are arranged in the insulating core body, the capacitive screens comprise a voltage-sharing capacitive screen forming a voltage-sharing capacitor C1, a voltage-dividing capacitive screen forming a voltage-dividing capacitor C2 and a grounding capacitive screen far away from the outermost side of the conductor, the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form a capacitive voltage divider, a first outgoing line is connected out for realizing the function of the voltage transformer, a coil is sleeved outside the insulating core body, and a second outgoing line is connected out for realizing the function of the current transformer, the functions of the voltage transformer and the current transformer can be realized under the condition that the diameter of a GIS pipe bus is unchanged, and the pipe bus has a small size, Low gas consumption and low cost.
Description
Technical Field
The invention relates to the field of high-voltage electrical appliances, in particular to a pipe bus bin which is used for being connected to a current transformer with voltage in a GIS in an electric power system.
Background
A voltage transformer and a current transformer in the existing gas insulated totally-enclosed combined electrical apparatus (GIS for short) are generally externally hung with independent gas bins on a tubular bus, and the voltage transformer and the current transformer can be connected to different positions of the GIS combined electrical apparatus as required, but the equipment has the disadvantages of large volume, complex structure, more gas consumption, low cost performance and inconvenient maintenance; for example, the coil of the independent current transformer is sleeved outside the conductor, and the coil and the conductor have to keep a larger interval due to high voltage, so that the diameter of the tubular bus bar is greatly increased.
The existing capacitive bushing and cable terminal are also provided with a voltage transformer and a current transformer which are used for collecting voltage and current signals of a line, but the capacitive bushing and cable terminal are limited in installation position, are generally installed at an incoming line end and an outgoing line end of a GIS (geographic information system), or on a circuit breaker or a transformer, and cannot be connected to different positions of the GIS combined electrical appliance as required.
SUMMERY OF THE UTILITY MODEL
The invention aims to overcome the defects of the prior art and provides a pipe bus bin with a voltage current transformer.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a take voltage current transformer's pipe bus storehouse, is including the storehouse body that is used for filling insulating gas, sets up an at least conductor in the storehouse body, is equipped with flange respectively at storehouse body both ends, and the cladding has insulating core outside the conductor, be equipped with in the insulating core with a plurality of capacitive screens of insulating layer setting in turn, a plurality of capacitive screens are including the voltage-sharing capacitive screen that forms voltage-sharing electric capacity C1, the voltage-sharing capacitive screen that forms voltage-sharing electric capacity C2 and keep away from the grounded capacitive screen in the outside of conductor, voltage-sharing electric capacity C1 and voltage-sharing electric capacity C2 establish ties and constitute the capacitive voltage divider, connect out first lead-out wire for realize the voltage transformer function, be equipped with the coil at the insulating core overcoat, connect out the second lead-out wire, be used for realizing the current transformer function.
Preferably, the plurality of capacitive screens further include a plurality of shielding capacitive screens forming a shielding anti-interference capacitor C3, the plurality of shielding capacitive screens are mutually overlapped and insulated from each other from one end of the insulating core to the other end of the insulating core along the axial direction of the insulating core, and are radially wrapped outside the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2.
Preferably, the plurality of capacitive screens further include an insulation information capacitive screen forming an insulation information collecting capacitor C4, and a third outgoing line is connected from the insulation information capacitive screen for online monitoring of insulation information.
Preferably, the insulation information capacitance screen is arranged between a voltage-sharing capacitance screen forming a voltage-sharing capacitance C1 and a voltage-dividing capacitance screen forming a voltage-dividing capacitance C2, the insulation information acquisition capacitance C4 is connected in series between the voltage-sharing capacitance C1 and the voltage-dividing capacitance C2, the voltage-sharing capacitance C1, the insulation information acquisition capacitance C4 and the voltage-dividing capacitance C2 which are connected in series are connected in parallel with the shielding anti-interference capacitance C3, a third outgoing line is led out from between the voltage-sharing capacitance C1 and the insulation information acquisition capacitance C4, and a first outgoing line is led out from between the insulation information acquisition capacitance C4 and the voltage-dividing capacitance C2.
Preferably, the insulation information capacitive screen is arranged between a shielding capacitive screen and a grounding capacitive screen which form the shielding anti-interference capacitor C3, two ends of the shielding anti-interference capacitor C3 and the insulation information acquisition capacitor C4 which are connected in series are connected in parallel at two ends of the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2 which are connected in series, a third outgoing line is led out from between the shielding anti-interference capacitor C3 and the insulation information acquisition capacitor C4, and a first outgoing line is led out from between the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2.
Preferably, the insulating core body uses glass filaments soaked in epoxy resin as an insulating layer, a semi-conducting belt or a metal belt as a capacitance screen, and the insulating layer and the capacitance screen are alternately wound on the conductor to form the insulating core body.
Preferably, be equipped with measuring terminal on the lateral wall of the storehouse body, first lead-out wire and second lead-out wire are connected with measuring terminal.
Preferably, the grounding capacitive screen is grounded through connection with the bin body, a ground potential is formed on the surface of the insulating core body, and the hollow coil is arranged on the outer side of the ground potential of the insulating core body in a clinging mode and serves as the coil.
Preferably, the connecting flange is provided with an insulator and/or a female plug seat, and the conductor is connected with the female plug seat in a plugging manner.
The GIS combiner is used for being connected to GIS combiners of 110KV and above 110 KV.
According to the pipe bus bin with the voltage current transformer, a dry-type insulating core body with the voltage-sharing capacitor C1, the voltage-dividing capacitor C2 and the ground potential is wrapped on a high-voltage conductor in the pipe bus bin, the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2 are connected in series and used for achieving the function of the voltage transformer, a coil is sleeved outside the insulating core body and used for achieving the function of the current transformer, the size of the section of pipe bus is greatly reduced by filling insulating gas in the pipe bus, the pipe bus bin can be flexibly arranged in a GIS, the pipe bus can have the functions of the voltage transformer and the current transformer under the condition that the diameter of the GIS pipe bus is unchanged, and the pipe bus bin with the voltage current transformer has the effects of small size, small gas consumption and low cost.
Drawings
FIG. 1 is a cross-sectional view of a tubular busbar compartment embodiment of the inventive current transformer with voltage;
FIG. 2 is an end side view of a tubular busbar compartment embodiment of the inventive current transformer with voltage;
FIG. 3 is a partial cross-sectional view of an embodiment of the inventive conductor jacket with an insulating core;
FIG. 4 is a schematic circuit diagram of a first embodiment of the insulating core of the present invention;
fig. 5 is a schematic circuit diagram of a second embodiment of the insulating core according to the present invention.
Detailed Description
The following provides an embodiment of a pipe bus bar compartment with a low-power voltage current transformer according to the present invention, which is further described with reference to the accompanying drawings. The inventive tubular busbar compartment with low-power voltage current transformer is not limited to the description of the following embodiments.
The pipe bus bin with the voltage current transformer comprises a bin body 1 used for being filled with insulating gas and at least one conductor 2 arranged in the bin body 1, wherein two ends of the bin body 1 are respectively provided with a connecting flange 3, an insulating core 4 is coated outside the conductor 2, a plurality of capacitive screens 6 which are alternately arranged with insulating layers are arranged in the insulating core 4, the capacitive screens 6 comprise a voltage-sharing capacitive screen 63 forming a voltage-sharing capacitor C1, a voltage-dividing capacitive screen 64 forming a voltage-dividing capacitor C2 and a grounded capacitive screen 62 far away from the outermost side of the conductor 2, the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form a capacitive voltage divider, a first outgoing line is connected out for realizing the function of the voltage transformer, a coil 9 is sheathed outside the insulating core 4, and a second outgoing line is connected out for realizing the function of the current transformer.
As shown in fig. 1-3, three conductors 2 are arranged in a bin body 1 of the tubular bus bin of the present embodiment, and are respectively used for connecting a three-phase circuit, and certainly, only one or two or more conductors 2 may be arranged; connecting flanges 3 are arranged at two ends of the bin body 1 and used for connecting the pipe bus bin with a gas bin of a GIS in a sealing manner, the conductor 2 is connected into a circuit of a GIS combined electrical appliance, and insulating gas, such as sulfur hexafluoride gas, is filled in the bin body 1; preferably, the connecting flange 3 is provided with a plug female socket 31 and an insulator 32, two ends of the conductor 2 are respectively connected with the plug female socket 31 in a plugging manner, rapid assembly is performed through the plug female socket 31, and insulation protection is performed through the insulator 32; an insulating core 4 is sleeved outside the conductor 2, the insulating core 4 forms ground potential, a coil 9 is sleeved outside the ground potential, a measuring terminal 7 is arranged on the outer side wall of the bin body 1, and a first outgoing line of the insulating core 4 and a second outgoing line of the coil 9 are connected with the measuring terminal 7.
As shown in fig. 3, a plurality of capacitive screens 6 alternately arranged with the insulating layer are arranged in the insulating core 4, and the capacitive screens 6 are respectively a voltage-sharing capacitive screen 63, a voltage-dividing capacitive screen 64 and a grounding capacitive screen 62 from the inner side to the outer side of the insulating core 4 close to the conductor. The innermost voltage-sharing capacitive screens 63 are high-voltage screens 61, the high-voltage screens 61 are electrically connected with the conductor 2 to have equal potential, the voltage-sharing capacitive screens 63 and the insulating layers are alternately arranged to form a voltage-sharing capacitor C1, and the voltage-sharing capacitive screens 63 divide and insulate high voltage gradually in the radial direction to play an insulating role; preferably, the two ends of the voltage-sharing capacitive screens 63 gradually shorten from the inner side to the outer side of the insulating core 4, and the voltage-sharing capacitive screens 63 are arranged coaxially and concentrically.
The voltage-dividing capacitive screen 64 is located between the voltage-dividing capacitive screens 63 and the grounding capacitive screen 62, the voltage-dividing capacitive screen 64 can be one or more, one voltage-dividing capacitive screen 64 and the grounding capacitive screen 62 form a voltage-dividing capacitor C2 or a plurality of voltage-dividing capacitive screens 64 form a voltage-dividing capacitor C2, the voltage-dividing capacitor C1 and the voltage-dividing capacitor C2 are connected in series to form a capacitive voltage divider, a first outgoing line is connected between the voltage-dividing capacitor C1 and the voltage-dividing capacitor C2, the first outgoing line serves as an information source of the voltage transformer, and the function of the voltage transformer is achieved.
The grounding capacitor screen 62 is grounded through being connected with the bin body 1, a ground potential is formed on the surface of the insulating core body 4, a voltage signal of the voltage-dividing capacitor C2 is led out of the ground potential of the insulating core body 4 through a first outgoing line and serves as an information source of a voltage transformer, an air-core coil is arranged on the outer side of the ground potential of the insulating core body and serves as the coil 9, a second outgoing line of the air-core coil is connected out of the air-core coil and serves as an information source of a current transformer, and the air-core coil can be tightly sleeved on the outer side of the ground potential of the insulating core body, so that the overall diameter is greatly reduced. The invention realizes the ground potential in the pipe bus bin through the insulating core body 4, so that an electronic hollow coil with low power can be arranged, and the volume is greatly reduced. As another example, an iron core coil may be used as the coil 9. The arrangement of the ground potential in the tubular bus duct is a scheme which needs to be avoided in the existing GIS tubular bus duct, because the conductor 2 passes through the high voltage of 110KV and above, the two ends of the conductor 2 are both high voltage, a plurality of conductors 2 are also arranged in the bin body 1, enough insulation distance needs to be kept between the ground potential and the high voltage arranged in the tubular bus duct, otherwise, the insulation requirement cannot be met, and the size of the GIS tubular bus duct can be enlarged by too large insulation distance, in the embodiment, the axial and radial electric field distribution can be better improved, the axial length is shortened, the radial size is reduced by adopting the mutual cooperation of the insulation gas and the solid insulation of the voltage-dividing capacitive screen to realize the function of the current transformer and the voltage transformer under the condition of ensuring the minimum volume of the tubular bus duct bin body Three conductors 2 can be installed satisfactorily in the size of the existing pipe bus bar bin.
Preferably, as another embodiment, the plurality of capacitive screens 6 further include a plurality of shielding capacitive screens 65 forming a shielding anti-interference capacitor C3, the plurality of shielding capacitive screens 65 are located between the voltage dividing capacitive screen 64 and the grounding capacitive screen 62, the plurality of shielding capacitive screens 65 are overlapped and insulated from each other from one end of the insulating core 4 to the other end of the insulating core 4 along the axial direction of the insulating core 4, and are wrapped radially outside the voltage equalizing capacitor C1 and the voltage dividing capacitor C2 to shield external signal interference. The innermost one of the shield capacitor screens 65 is at a high voltage and the outermost one is at a ground potential, and both ends of the shield interference preventing capacitor C3 are connected in parallel to both ends of the voltage equalizing capacitor C1 and the voltage dividing capacitor C2 which are connected in series.
Preferably, the plurality of capacitive screens 6 further include an insulation information capacitive screen 66 forming an insulation information collecting capacitor C4, a third outgoing line is connected to the insulation information capacitive screen 66 for outputting a signal source to realize online monitoring of the insulation information of the insulation core 4, the third outgoing line is output from the insulation information collecting capacitor C4 and connected to the measuring terminal 7, and signals output by the first outgoing line and the third outgoing line can realize online monitoring of one or more of insulation information such as dielectric loss, capacitance, full current, capacitive current, resistive current, and the like.
In one embodiment shown in fig. 4, the insulating information capacitive screen 66 is disposed between a voltage-sharing capacitive screen 63 forming a voltage-sharing capacitor C1 and a voltage-dividing capacitive screen 64 forming a voltage-dividing capacitor C2, the insulating information collecting capacitor C4 is connected in series between the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2, the voltage-sharing capacitor C1, the insulating information collecting capacitor C4 and the voltage-dividing capacitor C2 which are connected in series are connected in parallel with the shielding anti-interference capacitor C3, a third outgoing line is led out from between the voltage-sharing capacitor C1 and the insulating information collecting capacitor C4, and a first outgoing line is led out from between the insulating information collecting capacitor C4 and the voltage-dividing capacitor C2.
In another embodiment as shown in fig. 5, the insulating information capacitive screen 66 is disposed between the shielding capacitive screen 65 and the grounded capacitive screen 62 which form the shielding anti-interference capacitor C3, the two ends of the shielding anti-interference capacitor C3 and the insulating information collecting capacitor C4 which are connected in series are connected in parallel to the two ends of the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2 which are connected in series, the third lead-out wire is led out from between the shielding anti-interference capacitor C3 and the insulating information collecting capacitor C4, and the first lead-out wire is led out from between the voltage-sharing capacitor C1 and the voltage-dividing capacitor C2.
In the insulating core 4 of the present embodiment, a glass filament impregnated with epoxy resin is used as an insulating layer, a semi-conductive tape or metal tape is used as a capacitive screen 6, and the insulating layer and the capacitive screen are alternately wound around a conductor 2 to form a sleeve-shaped insulating core 4.
In the embodiment, the dry-type insulating core 4 with the voltage-sharing capacitor C1, the voltage-dividing capacitor C2 and the ground potential is wrapped on the high-voltage conductor of a short section of pipe bus bin, preferably, the dry-type insulating core can also be wrapped with the shielding anti-interference capacitor C3 and/or the insulating information acquisition capacitor C4, and the volume of the section of pipe bus is reduced to the maximum extent by filling insulating gas in the pipe bus, so that the pipe bus bin is flexibly arranged in the GIS, and the GIS pipe bus can have the functions of a voltage transformer and a current transformer without an external air bin under the condition that the volume is unchanged.
The tubular bus bin is suitable for being used in GIS combined electrical appliances of 110KV and above 110KV, taking the GIS combined electrical appliance of 110KV as an example, the high-voltage conductor 2 wound with the insulating core 4 only needs about 700mm in length and about 120mm in diameter, and can reach about 3000mm in length and about 200mm in diameter compared with the existing 110KV dry-type sleeve, so that the tubular bus bin not only can be installed at any position of the GIS combined electrical appliance relative to the existing dry-type sleeve to realize the functions of a current transformer and a voltage transformer, realize the on-line monitoring of each position of the GIS combined electrical appliance, but also can be installed in the existing GIS tubular bus bin, the diameter of the GIS tubular bus bin can be unchanged, and compared with the existing dry-type sleeve and independent voltage transformer and current transformer externally hung with independent gas bins, the tubular bus bin can reduce the volume of equipment and simplify the structure of the equipment, the gas consumption is reduced, the overhaul and the maintenance are convenient, the equipment cost is reduced, and the GIS design combination is more flexible and convenient.
The foregoing is a more detailed description of the invention, taken in conjunction with the accompanying preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the inventive concept, and all such changes should be considered as falling within the scope of the invention.
Claims (10)
1. The utility model provides a take voltage current transformer's pipe bus storehouse, is equipped with flange (3), its characterized in that respectively at storehouse body (1) both ends including the storehouse body (1) that is used for filling insulating gas, at least one conductor (2) of setting in the storehouse body (1): the conductor is characterized in that an insulating core body (4) is coated outside the conductor (2), a plurality of capacitive screens (6) which are alternately arranged with insulating layers are arranged in the insulating core body (4), the capacitive screens (6) comprise a voltage-sharing capacitive screen (63) forming a voltage-sharing capacitor (C1), a voltage-dividing capacitive screen (64) forming a voltage-dividing capacitor (C2) and a grounding capacitive screen (62) far away from the outermost side of the conductor (2), the voltage-sharing capacitor (C1) and the voltage-dividing capacitor (C2) are connected in series to form a capacitive voltage divider, a first leading-out wire is connected out for realizing the function of a voltage transformer, a coil (9) is arranged outside the insulating core body (4), and a second leading-out wire is connected out for realizing the function of a current transformer.
2. The tubular busbar compartment with voltage current transformer according to claim 1, wherein: the capacitive screens (6) further comprise a plurality of shielding capacitive screens (65) forming shielding anti-interference capacitors (C3), the shielding capacitive screens (65) are mutually nested and mutually insulated from one end of the insulating core body (4) to the other end of the insulating core body (4) along the axial direction of the insulating core body (4), and are radially wrapped outside the voltage-sharing capacitor (C1) and the voltage-dividing capacitor (C2).
3. The tubular busbar compartment with voltage current transformer according to claim 2, wherein: the plurality of capacitive screens (6) further comprise an insulation information capacitive screen (66) forming an insulation information acquisition capacitor (C4), and a third outgoing line is connected from the insulation information capacitive screen (66) and used for realizing the online monitoring of the insulation information.
4. The tubular busbar chamber of a current transformer with voltage according to claim 3, wherein: the insulation information capacitance screen (66) is arranged between a voltage-sharing capacitance screen (63) forming a voltage-sharing capacitance (C1) and a voltage-dividing capacitance screen (64) forming a voltage-dividing capacitance (C2), the insulation information acquisition capacitance (C4) is connected in series between the voltage-sharing capacitance (C1) and the voltage-dividing capacitance (C2), the voltage-sharing capacitance (C1) after being connected in series, the insulation information acquisition capacitance (C4) and the voltage-dividing capacitance (C2) are connected in parallel with the shielding anti-interference capacitance (C3), a third outgoing line is led out from between the voltage-sharing capacitance (C1) and the insulation information acquisition capacitance (C4), and a first outgoing line is led out from between the insulation information acquisition capacitance (C4) and the voltage-dividing capacitance (C2).
5. The tubular busbar compartment with voltage current transformer of claim 3, wherein: the insulation information capacitive screen (66) is arranged between a shielding capacitive screen (65) and a grounding capacitive screen (62) which form a shielding anti-interference capacitor (C3), two ends of the shielding anti-interference capacitor (C3) and the insulation information acquisition capacitor (C4) which are connected in series are connected in parallel at two ends of a voltage-sharing capacitor (C1) and a voltage-dividing capacitor (C2) which are connected in series, a third leading-out wire is arranged between the shielding anti-interference capacitor (C3) and the insulation information acquisition capacitor (C4), and a first leading-out wire is led out from the space between the voltage-sharing capacitor (C1) and the voltage-dividing capacitor (C2).
6. The tubular busbar compartment of a current transformer with voltage according to claim 1, wherein: the insulating core body (4) adopts glass filaments soaked in epoxy resin as an insulating layer, a semi-conducting belt or a metal belt as a capacitance screen (6), and the insulating layer and the capacitance screen are alternately wound on the conductor (2) to form the insulating core body (4).
7. The tubular busbar compartment of a current transformer with voltage according to claim 1, wherein: be equipped with measurement terminal (7) on the lateral wall of the storehouse body (1), first lead-out wire and second lead-out wire are connected with measurement terminal (7).
8. The tubular busbar compartment with voltage current transformer according to claim 1, wherein: the grounding capacitance screen (62) is connected with the bin body (1) to be grounded, a ground potential is formed on the surface of the insulating core body (4), and an air-core coil is arranged on the outer side of the ground potential of the insulating core body in a clinging mode to serve as the coil (9).
9. The tubular busbar compartment of a current transformer with voltage according to claim 1, wherein: be equipped with insulator (32) on flange (3), and/or, be equipped with female seat of plug (31) on flange (3), conductor (2) and female seat of plug (31) plug connection.
10. The tubular busbar compartment of a current transformer with voltage according to claim 1, wherein: the GIS combiner is used for being connected to 110KV and GIS combiners above 110 KV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122936827.1U CN217061742U (en) | 2021-11-26 | 2021-11-26 | Tubular bus bin with voltage and current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122936827.1U CN217061742U (en) | 2021-11-26 | 2021-11-26 | Tubular bus bin with voltage and current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217061742U true CN217061742U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122936827.1U Active CN217061742U (en) | 2021-11-26 | 2021-11-26 | Tubular bus bin with voltage and current transformer |
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|---|---|
| CN (1) | CN217061742U (en) |
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2021
- 2021-11-26 CN CN202122936827.1U patent/CN217061742U/en active Active
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