CN211719403U - +/-500 kV flexible direct current converter transformer with valve sleeve arranged outdoors - Google Patents
+/-500 kV flexible direct current converter transformer with valve sleeve arranged outdoors Download PDFInfo
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- CN211719403U CN211719403U CN202020491174.3U CN202020491174U CN211719403U CN 211719403 U CN211719403 U CN 211719403U CN 202020491174 U CN202020491174 U CN 202020491174U CN 211719403 U CN211719403 U CN 211719403U
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Abstract
The utility model discloses a +/-500 kV flexible direct current converter transformer with valve sleeve pipes arranged outdoors, which comprises an oil tank, an on-load tap-changer and a cooler, and has a single-phase duplex winding structure, wherein coils are sleeved on the first to second core columns in the middle, two outer side columns are only used as magnetic flux loops, and valve side coils and net side coils on the two core columns are respectively connected in parallel; the arrangement sequence of the coils on each core column is as follows from the iron core side: pressure regulating coil-net side coil-valve side coil; the coils on the first core column are wound on the left side, and the coils on the second core column are wound on the right side. The utility model discloses a domestic first flexible direct current product that capacity is the biggest, voltage level is the highest, and whole insulation level is high, and overall structure satisfies the mechanical strength and the tolerant short circuit ability of product, has reduced the design and the operation degree of difficulty of main insulation system, has improved the fail safe nature of product, can realize the major technological breakthrough of the flexible direct current converter transformer of superhigh pressure, has filled internal blank.
Description
Technical Field
The utility model relates to a transformer manufacturing technology specifically is a flexible direct current converter transformer of 500kV that valve barrel is arranged in open air.
Background
The flexible direct-current transmission technology is a new generation direct-current transmission system based on a power converter and a pulse width modulation technology, and plays an increasingly important role in the fields of new energy grid connection and consumption, asynchronous networking, island power supply and remote transmission in China. The highest voltage grade of the valve side of the prior flexible direct current engineering converter transformer is +/-320 kV, and a high-capacity and high-voltage flexible direct current converter transformer exceeding +/-320 kV is not available at present. The original high-voltage flexible direct current converter transformer has complex valve side outlet insulation structure, high manufacturing cost, difficult installation and more transformer volume and occupied area; meanwhile, the design and operation difficulty of the main insulation structure of the original transformer is high, and the safety and reliability of the product are affected.
SUMMERY OF THE UTILITY MODEL
The problem to be solved by the utility model is to provide a can satisfy engineering demand, simple structure, the outdoor flexible direct current converter transformer of 500kV who arranges of low-cost valve barrel that flexible direct current engineering converter transformer valve side voltage level is not high among the prior art, can't satisfy flexible direct current looped netowrk engineering demand and valve side insulation construction complicacy, manufacturing cost height are not enough, the utility model provides a can satisfy engineering demand, simple structure.
In order to solve the technical problem, the utility model discloses a technical scheme is:
the utility model provides a +/-500 kV flexible direct current converter transformer with valve sleeve pipes arranged outdoors, which comprises an oil tank, an on-load tap-changer and a cooler, and has a single-phase duplex winding structure, wherein coils are sleeved on the first to the second core columns in the middle, two outer side columns are only used as magnetic flux loops, and valve side coils and net side coils on the two core columns are respectively connected in parallel; the arrangement sequence of the coils on each core column is as follows from the iron core side: pressure regulating coil-net side coil-valve side coil; the coils on the first core column are wound on the left side, and the coils on the second core column are wound on the right side.
The valve side coil is horizontally led out in an end outlet radial direction, and is electrically connected with a coil primary wire through a copper brush wire for an aluminum tube, an outlet at the upper part of the valve side coil on the first core column is connected with a lead cable, then passes through a shielding tube, passes through a valve side outlet device, then passes through a box cover and is vertically led out to a valve side lifting seat to be connected with an a-phase 500kV sleeve; and the lower outlet of the second core column valve side coil penetrates through the shielding pipe after being connected with the lead cable, passes through the valve side outlet device, penetrates through the box cover and is vertically led out to the valve side lifting seat to be connected with a b-phase 500kV sleeve.
The valve side outlet device is shielded by a multi-layer oil gap-divided molded paper pulp piece at the tail part of a valve side sleeve, the part below a pressure equalizing ball is gradually transited, an insulating piece is wrapped outside a shielding pipe, and a shielding ring is arranged at the joint of a valve side lifting seat and a box cover.
The head ends of the net side coils on the first and second columns are connected together to be connected with an A-phase 330kV sleeve, and the tail end heads of the net side coils and the voltage regulating coils are connected to the tap switches of each column respectively; the adjusted tap line is led out of a cable through a tap switch and is connected to a neutral point B-phase sleeve.
The outgoing line on the net side is obliquely led out from the box cover through a 330kV sleeve, and the +/-500 kV sleeve on the valve side is vertically led out from two sides of a long shaft of the box cover and is exposed out of the valve hall. The utility model has the following beneficial effects and advantages:
1. the utility model provides a +/-500 kV flexible direct current converter transformer with valve sleeve pipes arranged outdoors, which is a flexible direct current product with the largest initial capacity and the highest voltage level in China, the whole insulation level is high, and the whole structure meets the mechanical strength and the short circuit tolerance capability of the product; the design and operation difficulty of a main insulation structure is reduced while the product performance is met, the safety and reliability of the product are improved, the major technical breakthrough of the ultrahigh-voltage flexible direct-current converter transformer can be realized, and the domestic blank is filled.
2. The utility model provides a valve side sleeve pipe does not stretch into the valve room, takes the open air to arrange perpendicularly, makes converter transformer's compact structure, reduces area, and valve side lead wire is qualified for the next round of competitions simple structure, compactness, reduces the quantity of formed part, has reduced product design cost, has reduced the work load of each process, reduces manufacturing cost and engineering cost, has improved manufacturing enterprise's benefit.
Drawings
Fig. 1 is a front view of the converter transformer of the present invention;
fig. 2 is a top view of the converter transformer of the present invention;
fig. 3 is a left side view of the converter transformer of the present invention;
fig. 4 is a schematic diagram of the arrangement and connection of the inner windings of the converter transformer according to the present invention;
FIG. 5 is the outlet diagram of the converter transformer valve of the present invention;
fig. 6 is the internal wiring schematic diagram of the converter transformer of the present invention.
The system comprises a converter transformer oil tank 1, an on-load tap changer 2, a cooler 3, a network side lifting seat 4, a network side sleeve 5, a valve side lifting seat 6, a valve side sleeve 7, a neutral point lifting seat 8, a neutral point sleeve 9, a pressure regulating coil 10, a network side coil 11, a valve side coil 12, a valve side outlet device 13, a molded paper pulp piece 14, a shielding pipe 15 and a shielding ring 16.
Detailed Description
The invention will be further explained with reference to the drawings attached to the specification.
As shown in fig. 1-3, the utility model provides a +/-500 kV flexible dc converter transformer with valve sleeve arranged outdoors, which comprises an oil tank 1, an on-load tap-changer 2 and a cooler 3, and has a single-phase duplex winding structure, coils are sleeved on the first-second core columns (namely, the column 1 and the column 2 in fig. 1) in the middle, two side columns outside are not sleeved with coils and are only used as magnetic flux loops, and a valve side coil 12 and a net side coil 11 on the two core columns are respectively connected in parallel; the arrangement sequence of the coils on each core column is as follows from the iron core side: pressure regulating coil 10-net side coil 11-valve side coil 12; the coils on the first core column are wound on the left side, and the coils on the second core column are wound on the right side.
In this embodiment, the on-load tap changer 2 is placed inside the left side of the transformer tank 1, and the cooler 3 is disposed on the stub shaft side of the transformer tank 1. One net-side bushing 5 and one neutral bushing 9, respectively, are arranged on the cooler side. The net side sleeve 5 is obliquely led out through a net side lifting seat 6 fixed on the upper part of the converter transformer oil tank 1; the neutral point sleeve 9 is vertically led out through a neutral point lifting seat 8 fixed on the upper part of the converter transformer oil tank 1; the two valve side sleeves 7 are vertically led out through a valve side lifting seat 6 fixed on the tank cover of the converter transformer oil tank 1 at one side far away from the cooler.
As shown in fig. 4, the utility model discloses a single-phase duplex winding structure, the iron core is single-phase four-column type structure, and the middle first, two heart posts (being post 1, post 2) go up the cover coil, and two other posts in the outside are as the magnetic flux return circuit, do not overlap the coil. The valve side coils and the net side coils of the columns 1 and 2 are connected in parallel, respectively. The coil arrangement sequence is 'voltage regulating coil 10-net side coil 11-valve side coil 12' from the iron core to the outside, all the coils on the column 1 are in the right winding direction, and all the coils on the column 2 are in the left winding direction.
As shown in fig. 5 and 6, the valve side coil 12 of the present invention is led out horizontally by using an end outgoing line. The column 1 and the column 2 are connected with the valve side coil 12 through high-frequency welding by adopting an aluminum pipe 15 and a copper brush wire with a coil original wire; the upper outlet of the valve side coil 12 on the column 1 is connected with a lead cable by cold pressing welding, then passes through the shielding tube 15, passes through the valve outlet device 13, passes through the box cover and is vertically led out to the valve side lifting seat 6 to be connected with the phase a valve side sleeve 7. And a lower outlet of a valve side coil 12 on the column 2 is connected with a lead cable through cold-pressing welding, passes through a valve side outlet device 13, penetrates through a box cover and is vertically led out to a valve side lifting seat 6, and is connected with a b-phase valve side sleeve 7.
The valve side outlet device 13 is only shielded by a multi-layer oil gap-separated molded paper pulp piece 14 at the tail part of the valve side sleeve by adopting a pressure equalizing ball accessory, the part below the pressure equalizing ball is gradually transited, a shielding aluminum pipe is covered with thick insulation, and a shielding ring 15 is arranged at the joint of a valve side lifting seat and a box cover, so that the intensity of a valve lead wire to a ground field is improved, and the partial discharge level of a product under the action of various alternating and direct current voltages is reduced.
As shown in fig. 6, the utility model discloses net side coil 11 head end on center pillar 1, the post 2 is gone out and is connect A looks net sleeve 5 together, and net side coil 11 end on post 1, the post 2 is gone out and is inserted tap switch 2 of every post respectively with voltage regulation coil 10 together, realizes having the voltage regulation of carrying and the adjustment of tapping. The adjusted tap line is led out of a cable through a tap switch and is connected to a neutral point B phase neutral point sleeve 9.
The utility model discloses to be applied to the flexible direct current looped netowrk engineering that the first valve side voltage class in the world is the highest, the voltage class is 500kV, and the valve side sleeve pipe does not stretch into the valve room, takes outdoor vertical layout, and the transformer volume reduces, simple structure, saves area, realizes the major technological breakthrough of the flexible direct current converter transformer of superhigh pressure.
Claims (5)
1. The utility model provides a flexible direct current converter transformer of 500kV that valve barrel arranged outdoors, includes oil tank, on-load tap-changer and cooler, its characterized in that: the valve side coils and the net side coils on the two core posts are respectively connected in parallel; the arrangement sequence of the coils on each core column is as follows from the iron core side: pressure regulating coil-net side coil-valve side coil; the coils on the first core column are wound on the left side, and the coils on the second core column are wound on the right side.
2. The ± 500kV flexible dc converter transformer with outdoor arranged valve casing according to claim 1, characterized in that: the valve side coil is horizontally led out in an end outlet radial direction, and is electrically connected with a coil primary wire through a copper brush wire for an aluminum tube, an outlet at the upper part of the valve side coil on the first core column is connected with a lead cable, then passes through a shielding tube, passes through a valve side outlet device, then passes through a box cover and is vertically led out to a valve side lifting seat to be connected with an a-phase 500kV sleeve; and the lower outlet of the second core column valve side coil penetrates through the shielding pipe after being connected with the lead cable, passes through the valve side outlet device, penetrates through the box cover and is vertically led out to the valve side lifting seat to be connected with a b-phase 500kV sleeve.
3. The ± 500kV flexible dc converter transformer with outdoor arranged valve casing according to claim 1, characterized in that: the valve side outlet device is shielded by a multi-layer oil gap-divided molded paper pulp piece at the tail part of a valve side sleeve, the part below a pressure equalizing ball is gradually transited, an insulating piece is wrapped outside a shielding pipe, and a shielding ring is arranged at the joint of a valve side lifting seat and a box cover.
4. The ± 500kV flexible dc converter transformer with outdoor arranged valve casing according to claim 1, characterized in that: the head ends of the net side coils on the first and second columns are connected together to be connected with an A-phase 330kV sleeve, and the tail end heads of the net side coils and the voltage regulating coils are connected to the tap switches of each column respectively; the adjusted tap line is led out of a cable through a tap switch and is connected to a neutral point B-phase sleeve.
5. The ± 500kV flexible dc converter transformer with outdoor arranged valve casing according to claim 1, characterized in that: the outgoing line on the net side is obliquely led out from the box cover through a 330kV sleeve, and the +/-500 kV sleeve on the valve side is vertically led out from two sides of a long shaft of the box cover and is exposed out of the valve hall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020491174.3U CN211719403U (en) | 2020-04-07 | 2020-04-07 | +/-500 kV flexible direct current converter transformer with valve sleeve arranged outdoors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020491174.3U CN211719403U (en) | 2020-04-07 | 2020-04-07 | +/-500 kV flexible direct current converter transformer with valve sleeve arranged outdoors |
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| Publication Number | Publication Date |
|---|---|
| CN211719403U true CN211719403U (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020491174.3U Active CN211719403U (en) | 2020-04-07 | 2020-04-07 | +/-500 kV flexible direct current converter transformer with valve sleeve arranged outdoors |
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| CN (1) | CN211719403U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114093609A (en) * | 2021-12-01 | 2022-02-25 | 国网上海市电力公司 | Converter transformer's ware body structure |
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2020
- 2020-04-07 CN CN202020491174.3U patent/CN211719403U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114093609A (en) * | 2021-12-01 | 2022-02-25 | 国网上海市电力公司 | Converter transformer's ware body structure |
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