CN113611497A - 220kV transformer low-voltage side double-branch outgoing line structure and method - Google Patents
220kV transformer low-voltage side double-branch outgoing line structure and method Download PDFInfo
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- CN113611497A CN113611497A CN202110834460.4A CN202110834460A CN113611497A CN 113611497 A CN113611497 A CN 113611497A CN 202110834460 A CN202110834460 A CN 202110834460A CN 113611497 A CN113611497 A CN 113611497A
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- bushing
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 29
- 229910052802 copper Inorganic materials 0.000 claims description 29
- 239000010949 copper Substances 0.000 claims description 29
- 241000883966 Astrophytum capricorne Species 0.000 claims description 9
- 238000002788 crimping Methods 0.000 claims description 6
- 230000001174 ascending effect Effects 0.000 claims description 3
- 241000283707 Capra Species 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 5
- 238000007906 compression Methods 0.000 claims 5
- 210000000078 claw Anatomy 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/2823—Wires
- H01F27/2828—Construction of conductive connections, of leads
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
Abstract
The invention relates to a 220kV transformer low-voltage side double-branch outgoing line structure and a method, and belongs to the technical field of transformer manufacturing. The technical scheme is as follows: on the premise of not changing the conventional structure of the low-voltage winding of the transformer, the two branch outgoing lines at the low-voltage side are realized by changing the wiring structure inside or outside the transformer oil tank, so that conditions are created for improving the output capacity at the low-voltage side. The invention has the beneficial effects that: on the premise of not changing the conventional structure of the low-voltage winding of the transformer, the low-voltage side of the transformer adopts double-branch outgoing lines, so that the direct distribution capacity of the low-voltage side is increased, the capacity of the low-voltage side of the transformer is improved, the burden of a low-voltage side circuit breaker is not increased, and the transformer is simple in structure, convenient to operate, safe and reliable.
Description
Technical Field
The invention relates to a 220kV transformer low-voltage side double-branch outgoing line structure and a method, and belongs to the technical field of transformer manufacturing.
Background
With the development of cities, the demand for electric power is rapidly increased, but land resources become increasingly scarce, so that the construction of a transformer substation is influenced, and the construction and development of a power grid are severely restricted. At present, the 220kV power grid function in the city is gradually changed and is converted from power transmission to power distribution. In order to solve the increasingly outstanding contradiction between the large distribution points of the transformer substation and the scarcity of land resources and solve the problem of difficult site selection and construction of the transformer substation, the direct distribution capacity of the low-voltage side is increased to become the development direction of large and medium-sized power transmission and transformation in the scarcity of land resources under the condition of not changing the scale of the existing main transformer, so that the method not only accords with the overall idea of urban intensive land utilization and land utilization benefit improvement, but also can ensure the economical efficiency, reliability and flexibility of power grid operation, and has certain social and economic benefits. Increasing the direct-matching capability of the low-voltage side needs to increase the capacity of the low-voltage side of the transformer, but does not increase the burden of the low-voltage side circuit breaker, which is a technical problem to be solved urgently in the field.
Disclosure of Invention
The invention aims to provide a 220kV transformer low-voltage side double-branch outgoing line structure and a method, on the premise of not changing the conventional structure of a transformer low-voltage winding, the low-voltage side of a transformer adopts double-branch outgoing lines, the direct-matching capacity of the low-voltage side is increased, the capacity of the low-voltage side of the transformer is improved, the burden of a low-voltage side circuit breaker is not increased, the structure is simple, the operation is convenient, the safety and the reliability are realized, and the problems in the background art are solved.
The technical scheme of the invention is as follows:
on the premise of not changing the conventional structure of a low-voltage winding of a transformer, the two branch outgoing lines of the low-voltage side are realized by changing a wiring structure inside or outside an oil tank of the transformer, so that conditions are created for improving the output capacity of the low-voltage side.
Based on the same inventive concept, the invention comprises two technical schemes.
The first technical scheme is as follows:
a220 kV transformer low-voltage side double-branch outgoing line structure is characterized in that six low-voltage sleeves are arranged on the low-voltage side outside a transformer oil tank, low-voltage coils of three phases of a transformer are connected in a triangular mode inside the oil tank, then two paper-coated cables are led out to two low-voltage sleeves in two ways for each phase, each paper-coated cable is connected with one low-voltage sleeve, two low-voltage sleeves are connected for each phase, and six low-voltage sleeves of three phases are outgoing lines.
And the six low-pressure sleeves are fixed on the oil tank through low-pressure lifting seats.
The second technical scheme is as follows:
a220 kV transformer low-voltage side double-branch outlet structure is characterized in that three low-voltage sleeves are arranged on three phases of a transformer and are consistent with a conventional transformer; the three-phase low-voltage coils of the transformer are connected in a triangular mode inside the oil tank, then each phase is led out by a paper-covered cable to be connected with one low-voltage sleeve, and the three phases are three low-voltage sleeves; the low-voltage sleeve is provided with a wiring terminal at the air side by using a horn-shaped sleeve, and the conventional common low-voltage sleeve wiring terminal is replaced; the top of goat's horn type bushing binding post is a minute two structures, falls into two ascending wiring copper bar terminals of branch, is left wiring copper bar terminal and right wiring copper bar terminal respectively, and the bottom of goat's horn type bushing binding post adopts staple bolt and fastener to be connected with the round copper bar on the low pressure sleeve pipe, on the basis of conventional transformer low pressure side outlet structure, has realized the function that two branches were qualified for the next round of competitions through changing the outside low pressure sleeve pipe binding post of oil tank.
The left wiring copper bar terminal and the right wiring copper bar terminal of the goat's horn-shaped sleeve wiring terminal are parallel to each other; the cleat-shaped sleeve connection terminal may be of a Y-shaped configuration.
The invention has the beneficial effects that: on the premise of not changing the conventional structure of the low-voltage winding of the transformer, the low-voltage side of the transformer adopts double-branch outgoing lines, so that the direct distribution capacity of the low-voltage side is increased, the capacity of the low-voltage side of the transformer is improved, the burden of a low-voltage side circuit breaker is not increased, and the transformer is simple in structure, convenient to operate, safe and reliable.
Drawings
FIG. 1 is a wiring schematic of an embodiment of the present invention;
FIG. 2 is a diagram of the internal wiring of the fuel tank according to the embodiment of the present invention;
FIG. 3 is a top view of a low pressure bushing arrangement according to an embodiment of the present invention;
FIG. 4 is a schematic view of a conventional low-voltage bushing terminal;
fig. 5 is a schematic top view of a conventional low-voltage bushing terminal;
FIG. 6 is a schematic view of a second cleat-shaped bushing terminal according to an embodiment of the present invention;
FIG. 7 is a schematic top view of a second cleat-shaped bushing connection terminal according to an embodiment of the present invention;
FIG. 8 is a view of a second sheepskin-type low pressure bushing arrangement in accordance with an embodiment of the present invention;
in the figure: the low-voltage coil comprises a low-voltage coil 1, a cable crimping connector 2, a paper-covered cable 3, a low-voltage sleeve 4, a common sleeve wiring terminal 5, a claw-shaped sleeve wiring terminal 6, a fastener 7, a low-voltage lifting seat 8, a hoop 9, a round copper bar 10, a left wiring copper bar terminal 11 and a right wiring copper bar terminal 12.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings.
On the premise of not changing the conventional structure of a low-voltage winding of a transformer, the two branch outgoing lines of the low-voltage side are realized by changing a wiring structure inside or outside an oil tank of the transformer, so that conditions are created for improving the output capacity of the low-voltage side.
Based on the same inventive concept, the invention comprises two technical schemes.
The first technical scheme is as follows:
a220 kV transformer low-voltage side double-branch outgoing line structure is characterized in that six low-voltage sleeves 4 are arranged on the low-voltage side outside a transformer oil tank, low-voltage coils 1 of three phases of a transformer are connected in a triangular mode inside the oil tank, then two paper-coated cables 3 are led out to two low-voltage sleeves 4 in two ways for each phase, each paper-coated cable is connected with one low-voltage sleeve, two low-voltage sleeves are connected for each phase, and six low-voltage sleeves are led out for the three phases.
The six low-pressure sleeves are fixed on the oil tank through the low-pressure lifting seats 8.
The second technical scheme is as follows:
a220 kV transformer low-voltage side double-branch outlet structure is characterized in that three low-voltage sleeves 4 are arranged on three phases of a transformer and are consistent with a conventional transformer; the three-phase low-voltage coils 1 of the transformer are connected in a triangular mode inside the oil tank, then each phase is led out by a paper-coated cable 3 to be connected with one low-voltage sleeve, and the three phases are three low-voltage sleeves; the low-voltage sleeve 4 is provided with a claw-shaped sleeve wiring terminal on the air side to replace the original common low-voltage sleeve wiring terminal; the top of goat's horn type bushing binding post is a minute two structures, falls into two ascending wiring copper bar terminals, is left wiring copper bar terminal 11 and right wiring copper bar terminal 12 respectively, and the bottom of goat's horn type bushing binding post adopts staple bolt 9 and fastener 7 to be connected with the round bar copper 10 on the low pressure sleeve pipe 4, on the basis of conventional transformer low pressure side outlet structure, has realized the function that two branches were qualified for the next round of competitions through changing the outside low pressure sleeve pipe binding post of oil tank.
The left wiring copper bar terminal 11 and the right wiring copper bar terminal 12 of the goat-horn-shaped sleeve wiring terminal are parallel to each other; the cleat-shaped sleeve connection terminal may be of a Y-shaped configuration.
The first embodiment is as follows: as shown in fig. 1, three-phase low-voltage coils 1 of the transformer are connected in a delta manner inside the oil tank, and each phase is led out by two paper-covered cables 3. As shown in fig. 2, the method comprises the following specific steps: taking the phase a as an example for explanation, the head of the phase a low-voltage coil and the tail of the phase b low-voltage coil are crimped by the cable crimping head 2, the two are at the same end of the cable crimping head 2, the other end of the cable crimping head 2 is crimped with two paper-covered cables 3, the two paper-covered cables 3 are respectively connected with a low-voltage sleeve 4, and the phase a is divided into two branch outgoing lines; the b-phase low-voltage coil and the c-phase low-voltage coil are divided into two branch outgoing lines by using a cable crimping head, two paper-covered cables and two low-voltage sleeves in the same way. The outer part of the oil tank is fixed on the oil tank by six low-voltage sleeves 4 through low-voltage lifting seats 8, and as shown in fig. 3, the low-voltage sleeves 4 are distributed into two rows and three columns; the three-phase six low-voltage bushings are divided into two branch outgoing lines, one branch is a1 low-voltage bushing, a b1 low-voltage bushing and a c1 low-voltage bushing, and the other branch is a2 low-voltage bushing, a b2 low-voltage bushing and a c2 low-voltage bushing, so that the function of double-branch outgoing lines on the low-voltage side is achieved.
Example two: the method comprises the following specific steps: the three-phase low-voltage coils 1 of the transformer are connected in a triangular mode inside the transformer oil tank, then each phase is led out through one paper-covered cable 3, each paper-covered cable 3 is connected with one low-voltage sleeve 4, the three phases share three low-voltage sleeves 4, the three-phase low-voltage sleeve is consistent with a conventional transformer, and at the moment, each phase is still a single-branch outgoing line. Then, three conventional bushing terminals 5 of the prior art are detached from the low-voltage bushing 4 and discarded without use, and the conventional bushing terminals 5 are shaped as shown in fig. 4. One end of the horn-shaped sleeve wiring terminal 6 of the invention is connected with a round copper bar 10 on the low-voltage sleeve 4 through a hoop 9 and a fastener 7. The goat's horn type bushing binding post 6 one end is circular-arc staple bolt 9, and the other end is two wiring copper bar ends of similar goat's horn shape, is left wiring copper bar terminal 11 and right wiring copper bar terminal 12 respectively, and the appearance of goat's horn type bushing binding post 6 is as shown in fig. 6. Therefore, on the basis of a conventional wire outlet structure, the function of low-voltage double-branch wire outlet can be realized only by replacing the low-voltage sleeve wiring terminal outside the oil tank.
Claims (7)
1. The utility model provides a two branch road outgoing line structures of 220kV transformer low pressure side which characterized in that: six low-voltage sleeves (4) are arranged on the low-voltage side outside the transformer oil tank, three-phase low-voltage coils (1) of the transformer are connected in a triangular mode inside the oil tank, then two paper-coated cables (3) are led out to the two low-voltage sleeves (4) in two ways for each phase, each paper-coated cable is connected with one low-voltage sleeve, the two low-voltage sleeves are connected for each phase, and the six low-voltage sleeves are led out for the three phases.
2. The low-voltage-side double-branch outgoing line structure of the 220kV transformer as claimed in claim 1, wherein: the six low-pressure sleeves are fixed on the oil tank through low-pressure lifting seats (8).
3. The utility model provides a two branch road outgoing line structures of 220kV transformer low pressure side which characterized in that: three low-voltage bushings (4) are arranged in three phases of the transformer and are consistent with a conventional transformer; the three-phase low-voltage coils (1) of the transformer are connected in a triangular mode inside the oil tank, then each phase is led out by a paper-coated cable (3) to be connected with one low-voltage sleeve, and the three phases are three low-voltage sleeves; the low-voltage sleeve (4) is provided with a claw-shaped sleeve wiring terminal on the air side to replace the original common low-voltage sleeve wiring terminal; the top of goat's horn type bushing binding post is a minute two structures, divide into two ascending wiring copper bar terminals, be left wiring copper bar terminal (11) and right wiring copper bar terminal (12) respectively, the bottom of goat's horn type bushing binding post adopts staple bolt (9) and fastener (7) to be connected with circle copper bar (10) on low pressure sleeve pipe (4), on the basis of conventional transformer low pressure side outlet structure, realized the function that two branches were qualified for the next round of competitions through changing the outside low pressure sleeve pipe binding post of oil tank.
4. The low-voltage-side double-branch outgoing line structure of the 220kV transformer as claimed in claim 3, wherein: the left wiring copper bar terminal (11) and the right wiring copper bar terminal (12) of the goat's horn-shaped sleeve pipe wiring terminal are parallel to each other.
5. A220 kV transformer low-voltage side double-branch outgoing line method is characterized by comprising the following steps: on the premise of not changing the conventional structure of the low-voltage winding of the transformer, the two branch outgoing lines at the low-voltage side are realized by changing the wiring structure inside or outside the transformer oil tank, so that conditions are created for improving the output capacity at the low-voltage side.
6. The low-voltage-side double-branch outgoing line method of the 220kV transformer as claimed in claim 5, wherein: six low-voltage sleeves (4) are arranged on the low-voltage side outside the transformer oil tank, three-phase low-voltage coils (1) of the transformer are connected in a triangular mode inside the oil tank, then two paper-coated cables (3) are led out to the two low-voltage sleeves (4) in two ways for each phase, each paper-coated cable is connected with one low-voltage sleeve, the two low-voltage sleeves are connected for each phase, and the six low-voltage sleeves are led out for the three phases; the method comprises the following specific steps: the head of the a-phase low-voltage coil and the tail of the b-phase low-voltage coil are in compression joint by a cable compression joint (2), the head and the tail of the a-phase low-voltage coil are at the same end of the cable compression joint (2), the other end of the cable compression joint (2) is in compression joint with two paper-coated cables (3), the two paper-coated cables (3) are respectively connected with a low-voltage sleeve (4), and the a-phase low-voltage coil is divided into two branches for outgoing lines; the b-phase low-voltage coil and the c-phase low-voltage coil are divided into two branch outgoing lines by using a cable crimping head, two paper-covered cables and two low-voltage sleeves in the same way; the low-pressure sleeves (4) are distributed into two rows and three columns; the three-phase six low-voltage bushings are divided into two branch outgoing lines, one branch is a1 low-voltage bushing, a b1 low-voltage bushing and a c1 low-voltage bushing, and the other branch is a2 low-voltage bushing, a b2 low-voltage bushing and a c2 low-voltage bushing, so that the function of double-branch outgoing lines on the low-voltage side is achieved.
7. The low-voltage-side double-branch outgoing line method of the 220kV transformer according to claim 5, which is characterized by comprising the following specific steps: the three-phase low-voltage coils (1) of the transformer are connected in a triangular mode inside a transformer oil tank, then each phase is led out through one paper-covered cable (3), each paper-covered cable (3) is connected with one low-voltage sleeve (4), the three phases share three low-voltage sleeves (4), the three-phase low-voltage sleeve is consistent with a conventional transformer, and at the moment, each phase is still a single-branch outgoing line; then three common bushing wiring terminals (5) are detached from the low-voltage bushing (4) and abandoned, and one end of the horn-shaped bushing wiring terminal (6) is connected with a round copper bar (10) on the low-voltage bushing (4) through a hoop (9) and a fastener (7); one end of the claw-shaped bushing wiring terminal (6) is an arc-shaped hoop (9), the other end of the claw-shaped bushing wiring terminal is two wiring copper bar ends similar to the claw shape, namely a left wiring copper bar terminal (11) and a right wiring copper bar terminal (12), and the function of low-voltage double-branch outgoing lines can be realized only by replacing a low-voltage bushing wiring terminal outside an oil tank on the basis of a conventional outgoing line structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834460.4A CN113611497A (en) | 2021-07-23 | 2021-07-23 | 220kV transformer low-voltage side double-branch outgoing line structure and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110834460.4A CN113611497A (en) | 2021-07-23 | 2021-07-23 | 220kV transformer low-voltage side double-branch outgoing line structure and method |
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| Publication Number | Publication Date |
|---|---|
| CN113611497A true CN113611497A (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110834460.4A Pending CN113611497A (en) | 2021-07-23 | 2021-07-23 | 220kV transformer low-voltage side double-branch outgoing line structure and method |
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| CN (1) | CN113611497A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1355827A (en) * | 1970-12-17 | 1974-06-05 | Merlin Gerin | Electrical power distribution system |
| CN102751079A (en) * | 2012-03-30 | 2012-10-24 | 山东电力设备有限公司 | Combined transformer for wind power generation |
| CN206114165U (en) * | 2016-08-19 | 2017-04-19 | 国网河南省电力公司电力科学研究院 | Perpendicular force sensor of transformer high -tension bushing tip goat's horn type gold utensil |
| CN207116195U (en) * | 2017-07-24 | 2018-03-16 | 特变电工沈阳变压器集团有限公司 | A kind of bushing shell for transformer terminal board structure |
| CN210668120U (en) * | 2019-11-21 | 2020-06-02 | 北京博瑞莱智能科技集团有限公司 | On-load tap changer and transformer |
| CN210838668U (en) * | 2019-11-07 | 2020-06-23 | 广州供电局有限公司 | Transformer substation equipment for increasing through-current capacity of low-voltage side of main transformer |
| CN111446074A (en) * | 2020-04-09 | 2020-07-24 | 深圳供电规划设计院有限公司 | Transformer device |
| CN112653144A (en) * | 2020-12-22 | 2021-04-13 | 深圳供电局有限公司 | 220kV transformer substation |
| CN213635640U (en) * | 2020-08-04 | 2021-07-06 | 广西柳州特种变压器有限责任公司 | Low-voltage high-current transformer with parallel split outgoing lines |
-
2021
- 2021-07-23 CN CN202110834460.4A patent/CN113611497A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1355827A (en) * | 1970-12-17 | 1974-06-05 | Merlin Gerin | Electrical power distribution system |
| CN102751079A (en) * | 2012-03-30 | 2012-10-24 | 山东电力设备有限公司 | Combined transformer for wind power generation |
| CN206114165U (en) * | 2016-08-19 | 2017-04-19 | 国网河南省电力公司电力科学研究院 | Perpendicular force sensor of transformer high -tension bushing tip goat's horn type gold utensil |
| CN207116195U (en) * | 2017-07-24 | 2018-03-16 | 特变电工沈阳变压器集团有限公司 | A kind of bushing shell for transformer terminal board structure |
| CN210838668U (en) * | 2019-11-07 | 2020-06-23 | 广州供电局有限公司 | Transformer substation equipment for increasing through-current capacity of low-voltage side of main transformer |
| CN210668120U (en) * | 2019-11-21 | 2020-06-02 | 北京博瑞莱智能科技集团有限公司 | On-load tap changer and transformer |
| CN111446074A (en) * | 2020-04-09 | 2020-07-24 | 深圳供电规划设计院有限公司 | Transformer device |
| CN213635640U (en) * | 2020-08-04 | 2021-07-06 | 广西柳州特种变压器有限责任公司 | Low-voltage high-current transformer with parallel split outgoing lines |
| CN112653144A (en) * | 2020-12-22 | 2021-04-13 | 深圳供电局有限公司 | 220kV transformer substation |
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Application publication date: 20211105 |
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