CN108400526B - Main transformer low-voltage side total circuit breaker loop arrangement structure based on vertically arranged buses - Google Patents
Main transformer low-voltage side total circuit breaker loop arrangement structure based on vertically arranged buses Download PDFInfo
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- CN108400526B CN108400526B CN201810385889.8A CN201810385889A CN108400526B CN 108400526 B CN108400526 B CN 108400526B CN 201810385889 A CN201810385889 A CN 201810385889A CN 108400526 B CN108400526 B CN 108400526B
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- circuit breaker
- steel pipe
- vertically arranged
- hard wire
- vertical steel
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 239000012212 insulator Substances 0.000 claims abstract description 37
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
- H02B1/207—Cross-bar layouts
Abstract
The invention discloses a main transformer low-voltage side total circuit breaker loop arrangement structure based on vertically arranged buses. The adoption of the back-to-back arrangement mode of the single column and the double bus bars can save the occupied area of the bus bar arrangement, but the circuit arrangement of the total circuit breaker still needs to occupy a certain area. The technical scheme of the invention is as follows: three first vertical steel pipe rods are independently arranged, and a post insulator is arranged at the upper end of each first vertical steel pipe rod; the device is provided with at least one door-shaped frame, wherein the door-shaped frame consists of two second vertical steel pipe rods and a horizontal cross arm, and three pillar insulators are arranged on the horizontal cross arm; the upper layer horizontal hard wire is arranged on the pillar insulator of the door-shaped frame; one end of the lower layer horizontal hard wire is connected with the post insulator of the first vertical steel pipe pole, and the other end is connected with the circuit breaker loop equipment. The invention optimizes the conventional total circuit breaker loops arranged on the same horizontal plane into an upper layer and a lower layer, thereby reducing the occupied area of the total circuit breaker loop arrangement.
Description
Technical Field
The invention relates to an arrangement structure and a framework of power equipment, in particular to a circuit arrangement structure of a main transformer low-voltage side total circuit breaker based on vertically arranged buses.
Background
The low-voltage side of the main transformer of the currently running 500kV transformer substation generally adopts a single-bus wiring mode, meanwhile, the reliability of an installation mode is considered, and the low-voltage side bus generally adopts a horizontal arrangement mode. However, in this wiring method, when a certain return line at the low-voltage side fails, the transformer is likely to be out of operation, and the accident range is widened, and therefore, in order to improve the reliability and operation of the main transformer low-voltage side wiring, it is required to install a total breaker at the main transformer low-voltage side of the 500kV transformer substation.
Because the total circuit breaker is arranged, the low-voltage side wiring mode is changed into a bus bar and main bus bar combined wiring mode, the bus bars are still horizontally arranged, so that the area of the transformer substation is increased, and a single-column double-bus bar back-to-back arrangement mode is adopted. The mode optimizes the bus arranged in a conventional horizontal mode into the bus arranged in the upper, middle and lower mode of the backrest, so that the bus and the bus can be arranged in the existing main transformer and reactive power field.
The adoption of the back-to-back arrangement mode of the single column and the double bus bars can save the occupied area of the bus bar arrangement, but the circuit arrangement of the total circuit breaker still needs to occupy a certain area. The current total circuit breaker loop in the mode of single-column double-bus back-to-back arrangement mainly adopts a mode of 'mouth' -shaped arrangement or a mode of '7' -shaped arrangement. The two arrangement modes occupy more area, and the low-pressure side equipment is difficult to arrange in the original field and is not attractive; in addition, the wires are more bent in the two arrangement modes, the arrangement requirement is relatively high, the difficulty of technical transformation is increased, and the area of a newly built station is not easy to reduce.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a main transformer low-voltage side total circuit breaker loop arrangement structure based on vertically arranged buses, which is characterized in that a plane is replaced by a space, and a conventional total circuit breaker loop arranged on the same plane is optimized to be arranged in an upper layer and a lower layer, so that the bus bars and the bus bars can be arranged on the existing main transformer and reactive sites, only one interval position is occupied, and the distribution device is arranged more compactly, thereby achieving the purpose of saving land occupation.
Therefore, the invention adopts the following technical scheme: the main transformer low-voltage side total circuit breaker loop arrangement structure based on the vertically arranged buses comprises a single-column double-bus back-to-back arrangement framework, main buses, bus bars, a vertically arranged first vertical steel pipe rod, a vertically arranged second vertical steel pipe rod, a horizontally arranged horizontal cross arm, an upper horizontal hard wire and a lower horizontal hard wire, wherein the main buses are respectively connected to two sides of the single-column double-bus back-to-back arrangement framework;
the three first vertical steel pipe rods are independently arranged, and a vertically arranged pillar insulator is arranged at the upper end of each first vertical steel pipe rod;
two second vertical steel pipe rods and a horizontal cross arm form a door-shaped frame, three vertically arranged post insulators are arranged on the horizontal cross arm, and at least one door-shaped frame is arranged; the upper layer horizontal hard wire is arranged on a pillar insulator of the door-shaped frame; one end of the lower layer horizontal hard wire is connected with a post insulator of the first vertical steel pipe pole, and the other end of the lower layer horizontal hard wire is connected with circuit breaker loop equipment.
As a further improvement and supplement to the technical scheme, the invention adopts the following technical measures:
the horizontal distance between adjacent phases of the three-phase hard wires is preferably 1.4-1.6 m, so that the safety distance between the phases is ensured, and the minimum electric distance required by insulation fit is met.
The same phase of the upper hard wire and the lower hard wire is arranged on the same vertical plane, so that the hard wires are conveniently connected with the bus bar and the main bus bar.
The upper layer horizontal hard wire is arranged right above the circuit breaker loop equipment, and the lower layer horizontal hard wire is horizontally connected with the circuit breaker loop equipment.
The circuit breaker loop equipment comprises an isolating switch, a circuit breaker and a current transformer, wherein the circuit breaker is arranged between the isolating switch and the current transformer, and soft wires are used for connection between the isolating switch and the circuit breaker and between the circuit breaker and the current transformer. The circuit breaker improves the reliability of wiring, and the problems of large engineering transformation and equipment selection specification standard are avoided to the greatest extent, so that the circuit breaker is convenient to operate, safely and operate and patrol, and is easy to overhaul and install.
The bus bar is connected with a pillar insulator arranged on the first vertical steel pipe rod by adopting a copper bar, the pillar insulator on the first vertical steel pipe rod is connected with the isolating switch by a lower layer horizontal hard wire, and three phases of the lower layer horizontal hard wire are equal in length;
the current transformer is characterized in that an upper layer horizontal hard wire is upwards lifted to the gate-shaped frame through a soft wire, three phases of the upper layer horizontal hard wire are different in length, an A phase of the upper layer horizontal hard wire is directly connected with an A phase of a main bus, a B, C phase of the upper layer horizontal hard wire is slightly shorter than the A phase, and the upper layer horizontal hard wire is connected with B, C of the main bus through a copper bar.
The height of the post insulator is preferably 1.4-1.6 meters.
The width of the door-shaped frame is preferably 4.8-5.2 m, and the height is preferably 7.0-7.2 m.
The distance between adjacent first vertical steel pipe poles is preferably 1.4-1.6 m, and the height of the first vertical steel pipe poles is preferably 2.9-3.1 m.
The single-column double-bus back-to-back arrangement framework comprises a steel pipe rod which is vertically arranged, the two sides of the steel pipe rod are provided with bus post insulators in a back-to-back mode, the bus post insulators are horizontally arranged, the bus bars are vertically arranged on one side of the steel pipe rod through the post insulators, and the main bus bars are vertically arranged on the other side of the steel pipe rod through the post insulators.
The invention optimizes the general breaker loops arranged on the same horizontal plane into an upper layer and a lower layer, so that the current main transformer and reactive power field can arrange the bus bars and the two bus bars of the main bus bars, and simultaneously, the invention can meet the condition that the general breaker loops only occupy one interval position, thereby realizing more compact distribution device arrangement and achieving the purpose of saving land occupation.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a left side view of FIG. 1 (omitting the "single column double busbar back-to-back arrangement frame");
fig. 3 is a top view of fig. 1.
In the figure, a 1-first vertical steel pipe rod, a 2-horizontal cross arm, a 3-upper horizontal hard wire, a 4-lower horizontal hard wire, a 5-pillar insulator, a 6-single-pillar double-bus back-to-back arrangement framework, a 7-main bus, an 8-bus bar, a 9-isolating switch, a 10-circuit breaker, an 11-current transformer and a 12-second vertical steel pipe rod.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
The main transformer low-voltage side total circuit breaker loop arrangement structure based on the vertically arranged buses, as shown in fig. 1 and 3, consists of a first vertical steel pipe rod 1, a second vertical steel pipe rod 12 which are vertically arranged, a horizontal cross arm 2 which is horizontally arranged, an upper layer horizontal hard wire 3, a lower layer horizontal hard wire 4, a single-column double-bus back-to-back arrangement framework 6, a main bus 7 and a bus 8. As shown in fig. 2, the first vertical steel pipe rods 1 are three and independently arranged, and a vertically arranged pillar insulator 5 is arranged at the upper end of each first vertical steel pipe rod. Two second vertical steel pipe rods 12 and one horizontal cross arm 2 form a door-shaped frame, two door-shaped frames are formed in a conformal mode, and three vertically arranged post insulators are arranged on the horizontal cross arm 2. The upper horizontal hard wire 3 is arranged on the post insulators 5 of the two portal frames.
As shown in fig. 1, the bus bar 8 is connected to a post insulator 5 provided on the first vertical steel pipe pole 1 through a copper bar, and the post insulator 5 is connected to a disconnecting switch 9 through a lower horizontal hard wire 4, and three phases of the lower horizontal hard wire are equal in length. A breaker 10 is arranged between the isolating switch 9 and the current transformer 11, and flexible wires are used for connection between the isolating switch 9 and the breaker 10 and between the breaker 10 and the current transformer 11. The current transformer 11 is connected with the main bus A phase and the main bus B, C through copper bars, wherein the upper layer horizontal hard wire 3 is picked up to the gate-shaped frame through the soft wire, the three phases of the upper layer horizontal hard wire are different in length, the phase A of the upper layer horizontal hard wire 3 is connected with the main bus A phase, and the phase B, C is slightly short. The inter-phase distance between the upper layer and the lower layer of three-phase horizontal hard wires is 1.5 meters, the height of the pillar insulator 5 is 1.5 meters, the width of the door-shaped frame is 5.0 meters, the height of the door-shaped frame is 7.1 meters, the height of the first vertical steel pipe rod 1 is 3 meters, and the horizontal distance between the adjacent first vertical steel pipe rods 1 is 1.5 meters. The same phase of the upper and lower layers of hard wires is arranged on the same vertical plane.
The single-column double-bus back-to-back arrangement framework 6 comprises a vertical steel pipe rod, the two sides of the steel pipe rod are provided with bus post insulators in a back-to-back mode, the bus post insulators are horizontally arranged, the bus bar 8 is vertically arranged on one side of the steel pipe rod through the post insulators, and the main bus bar 7 is vertically arranged on the other side of the steel pipe rod through the post insulators.
This single column, double busbar back-to-back arrangement architecture is prior art, which is described in detail in CN201610596199.8 and CN 201620783363.1.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the protection scope of the present invention.
Claims (10)
1. Main transformer low-voltage side total circuit breaker loop arrangement structure based on vertical arrangement bus comprises a single-column double-bus back-to-back arrangement framework (6), and main bus bars (7) and bus bars (8) which are respectively connected to two sides of the single-column double-bus back-to-back arrangement framework (6), and is characterized by further comprising a first vertical steel pipe rod (1) which is vertically arranged, a second vertical steel pipe rod (12) which is vertically arranged, a horizontal cross arm (2) which is horizontally arranged, an upper horizontal hard wire (3) and a lower horizontal hard wire (4);
the first vertical steel pipe rods (1) are three and are independently arranged, and a vertically arranged pillar insulator (5) is arranged at the upper end of each first vertical steel pipe rod;
two second vertical steel pipe rods (12) and a horizontal cross arm (2) form a door-shaped frame, three vertically arranged post insulators (5) are arranged on the horizontal cross arm, and at least one door-shaped frame is arranged; the upper layer horizontal hard wire (3) is arranged on a pillar insulator (5) of the door-shaped frame; one end of the lower layer horizontal hard wire (4) is connected with a post insulator (5) of the first vertical steel pipe pole (1), and the other end is connected with circuit breaker loop equipment.
2. The main transformer low-voltage side total circuit breaker circuit arrangement structure based on vertically arranged buses according to claim 1, characterized in that the horizontal distance between adjacent upper level horizontal hard wires (3) and lower level horizontal hard wires (4) is 1.4-1.6 meters.
3. The main transformer low-voltage side total circuit breaker circuit arrangement structure based on vertically arranged buses according to claim 1, wherein the same phases of the upper and lower layers of hard wires are arranged on the same vertical plane.
4. The main transformer low-voltage side total circuit breaker circuit arrangement structure based on vertically arranged buses according to claim 1, characterized in that the upper layer horizontal hard wire (3) is arranged right above the circuit breaker circuit equipment, and the lower layer horizontal hard wire is horizontally connected with the circuit breaker circuit equipment.
5. The main transformer low-voltage side total circuit breaker loop arrangement structure based on the vertically arranged buses according to claim 1, 2, 3 or 4, wherein the circuit breaker loop device comprises a disconnecting switch (9), a circuit breaker (10) and a current transformer (11), wherein the circuit breaker (10) is arranged between the disconnecting switch (9) and the current transformer (11), and flexible wire connection is adopted between the disconnecting switch (9) and the circuit breaker (10) and between the circuit breaker (10) and the current transformer (11).
6. The main transformer low-voltage side total circuit breaker circuit arrangement structure based on vertically arranged buses as claimed in claim 5, wherein,
the bus bar (8) is connected with a pillar insulator (5) arranged on the first vertical steel pipe pole (1) by adopting a copper bar, the pillar insulator (5) on the first vertical steel pipe pole (1) is connected with the isolating switch (9) by a lower layer horizontal hard wire (4), and three phases of the lower layer horizontal hard wire are equal in length;
the current transformer (11) is characterized in that the upper layer horizontal hard wire (3) on the gate-shaped frame is picked up through the soft wire, the three phases of the upper layer horizontal hard wire are different in length, the A phase of the upper layer horizontal hard wire (3) is directly connected with the A phase of the main bus, the B, C phase of the upper layer horizontal hard wire (3) is slightly shorter than the A phase, and the upper layer horizontal hard wire is connected with B, C of the main bus through the copper bar.
7. The main transformer low-voltage side total circuit breaker circuit arrangement based on vertically arranged buses according to claim 1, 2, 3 or 4, characterized in that the height of the post insulator (5) is 1.4-1.6 meters.
8. The main transformer low voltage side total circuit breaker circuit arrangement based on vertically arranged buses according to claim 1, 2, 3 or 4, characterized in that the width of the gantry is 4.8-5.2 meters and the height is 7.0-7.2 meters.
9. The main transformer low voltage side total circuit breaker circuit arrangement based on vertically arranged bus bars according to claim 1, 2, 3 or 4, characterized in that the distance between adjacent first vertical steel pipe poles (1) is 1.4-1.6 meters and the height of the first vertical steel pipe pole (1) is 2.9-3.1 meters.
10. The main transformer low-voltage side total circuit breaker loop arrangement structure based on the vertically arranged buses according to claim 1, 2, 3 or 4, wherein the single-column double-bus back-to-back arrangement frame (6) comprises a vertically arranged steel pipe rod, the two sides of the steel pipe rod are provided with post insulators of the buses in a back-to-back mode, the post insulators are horizontally arranged, the bus bars (8) are vertically arranged on one side of the steel pipe rod through the post insulators, and the main bus bars (7) are vertically arranged on the other side of the steel pipe rod through the post insulators.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385889.8A CN108400526B (en) | 2018-04-26 | 2018-04-26 | Main transformer low-voltage side total circuit breaker loop arrangement structure based on vertically arranged buses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810385889.8A CN108400526B (en) | 2018-04-26 | 2018-04-26 | Main transformer low-voltage side total circuit breaker loop arrangement structure based on vertically arranged buses |
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| Publication Number | Publication Date |
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| CN108400526A CN108400526A (en) | 2018-08-14 |
| CN108400526B true CN108400526B (en) | 2023-11-03 |
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| CN201810385889.8A Active CN108400526B (en) | 2018-04-26 | 2018-04-26 | Main transformer low-voltage side total circuit breaker loop arrangement structure based on vertically arranged buses |
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| CN208015086U (en) * | 2018-04-26 | 2018-10-26 | 国网浙江省电力有限公司经济技术研究院 | Main transformer low-pressure side main breaker circuit arrangement based on vertical arrangement busbar |
-
2018
- 2018-04-26 CN CN201810385889.8A patent/CN108400526B/en active Active
Patent Citations (12)
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|---|---|---|---|---|
| JP2003299216A (en) * | 2002-03-29 | 2003-10-17 | Toshiba Corp | Gas-insulated switchgear |
| CN101001005A (en) * | 2007-01-05 | 2007-07-18 | 西安电力机械制造公司 | Gas insulation switch device |
| CN201061089Y (en) * | 2007-06-29 | 2008-05-14 | 天津市汇能电气设备制造有限公司 | Non-metal housing bus closed type low voltage distribution box |
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| CN108400526A (en) | 2018-08-14 |
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