CN110718888A - Construction method of rectangular bus at generator outlet of large-scale transformer substation - Google Patents
Construction method of rectangular bus at generator outlet of large-scale transformer substation Download PDFInfo
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- CN110718888A CN110718888A CN201911138419.2A CN201911138419A CN110718888A CN 110718888 A CN110718888 A CN 110718888A CN 201911138419 A CN201911138419 A CN 201911138419A CN 110718888 A CN110718888 A CN 110718888A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
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Abstract
The invention discloses a construction method of a rectangular bus at an outlet of a generator of a large-scale transformer substation, which specifically comprises the following steps: 1) paying-off measurement, 2) mounting of an insulator, 3) processing of a bus, 4) connection of the bus, 5) mounting of the bus, and 6) checking power transmission. The generator outlets are connected by adopting a rectangular bus structure, so that the generator has the advantages of large current-carrying capacity, simple structure, convenience in installation and maintenance and the like, and is attractive in process, simple in structure and beneficial to later-stage operation and maintenance; by adopting the method to process the bus, the construction efficiency is improved.
Description
The technical field is as follows:
the invention relates to a construction mode of generator outlet bus connection, in particular to a construction method of a rectangular bus at an outlet of a generator of a large-scale transformer substation.
Secondly, background art:
along with the development of social economy, power consumption crescent, the construction of large capacity power plant increases gradually, and the isolated phase generating line has occupied great market, but because seal isolated phase generating line shell and adopt the aluminum product, the welding degree of difficulty is great, has certain sealed problem, and the structure is complicated, and the installation is difficult, is unfavorable for the maintenance in later stage.
Thirdly, the invention content:
the technical problem to be solved by the invention is as follows: the method for constructing the rectangular bus at the outlet of the generator of the large-scale transformer substation has the advantages of large current-carrying capacity, simple structure, convenience in installation and maintenance and the like.
The technical scheme adopted by the invention for solving the technical problem is as follows:
1. a construction method of a rectangular bus at an outlet of a generator of a large-scale transformer substation comprises the following specific steps:
the preparation work includes:
1) preparing busbars, insulators, hardware fittings and the like required by construction, and counting the number of the busbars, the insulators, the hardware fittings and the like;
2) and (3) paying off measurement:
a. checking whether the bus conforms to the drawing according to different conditions of bus and bracket laying;
b. measuring the installation position of a bus in the distribution box, and checking whether the safety distance between the position and other parts on the equipment meets the requirement;
c. measuring the processing size of each section of bus and the size of the bracket, and marking the mounting distance of the bracket or the mounting position of the fixing piece;
d. inspecting the insulator to ensure that the appearance of the insulator has no cracks or defects, and inspecting whether the bolt and the nut poured into the insulator are firm;
the method comprises the following specific operation steps:
1) and manufacturing and installing a support:
a. the bus support is made of angle steel and is fixed on a wall through an expansion bolt;
b. welding a cushion block on the angle steel, and punching holes on the cushion block, so that the insulator base is convenient to bolt;
2) and installing an insulator:
a. the insulator adopts an indoor high-voltage post insulator, insulation is measured by shaking before installation, and the insulator is qualified when the insulation resistance value is more than 1 megaohm;
b. the insulator fixing hardware fitting adopts a double-plate bus fixing hardware fitting, and the manufacturing specification of the insulator fixing hardware fitting is matched with the specification of a bus;
2) processing the bus:
a. the bus adopts double rows of copper buses, the bus straightening adopts a master tape straightener to straighten the bus, a wooden hammer is needed during manual straightening, and a railway is laid below the wooden hammer to operate, so that an iron hammer is not needed;
b. the bus is cut off by a handsaw or a grinding wheel saw, and the bus is not cut off by electric arc or acetylene;
c. the bus is bent in a cold bending mode, cracks cannot be formed at the bent part when the bending device is used for bending, and the length of the twisted part of the bus is 3 times of the width of the bus;
3) and (3) connecting the bus:
a. the bus adopts a bolt connection mode, and four bolt holes are drilled at the bus connection position; the flat washer is a thick washer and is matched with the spring pad, the bolt, the flat washer and the spring pad need to be galvanized, and the length of the bolt is 7mm after the bolt is fastened and the screw thread is exposed out of the nut;
b. the bus and the bus joint face should be tightly connected and kept flat and clean, and the outer surface layer is coated with electric composite grease;
c. when the rectangular bus is lapped, the distance from the joint to the edge of the supporting splint of the post insulator is 70mm, and the distance from the end of the upper bus to the flat bending start position of the lower bus is 70 mm;
3) bus bar mounting
The distance between the parallel parts of the bus is kept consistent and straight and neat, and the bus color mark is sleeved with yellow, green and red heat shrink sleeves; when the bus is installed, the horizontal section: the height error of the two supporting points is less than 3mm, the total length is 9mm, and the vertical section: the vertical error of the two support points is less than 2mm, and the total length is 5 mm;
4) checking power transmission
a. After the bus is installed, the bus needs to be comprehensively checked, and tools and sundries on a working site are cleaned;
b. before power transmission of the bus, a voltage withstand test is carried out, the bus below 500V can be shaken by a 500V shaking meter, and the insulation resistance is more than 0.5M omega;
c. checking whether the interface of the bus is tightly connected or not and whether the fastening torque value of the connecting bolt meets the requirement or not;
d. whether the bus insulator and the support are fixed firmly or not, whether the installation position is correct or not and whether the distance is even or not are checked, and the surface cleanness of the insulator is guaranteed. The specification of the angle steel for manufacturing the bus support is as follows: the galvanized cushion blocks with the specification of 200x200x10 are welded on the angle steel by 50 x 5, and holes with the specification of phi 18 are punched in each galvanized cushion block.
The bus installation also needs to meet the condition that the gap between the rectangular bus pieces is equal to the thickness of the bus, the middle fixing frame of the rectangular bus pieces does not form a closed magnetic circuit, and the used bolt threads are exposed out of the nut 3.
When the bus support and other non-electrified metal parts grounding branches are laid, the bus support and other non-electrified metal parts grounding branches are tightly and firmly connected, the bus direction is reasonable, and the color code is accurate.
The invention has the following positive beneficial effects:
the outlet of the generator adopts a rectangular bus structure, has the advantages of large current-carrying capacity, simple structure, convenience in installation and maintenance and the like, and is attractive in process, simple in structure and beneficial to later-stage operation and maintenance; by adopting the method to process the bus, the construction efficiency is improved.
Fourthly, explanation of the attached drawings:
FIG. 1 is a construction flow chart of the present invention.
The fifth embodiment is as follows:
the invention will be further explained and explained with reference to the drawings, in which:
a construction method of a rectangular bus at an outlet of a generator of a large-scale transformer substation comprises the following specific steps:
the preparation work includes:
1) preparing busbars, insulators, hardware fittings and the like required by construction, and counting the number of the busbars, the insulators, the hardware fittings and the like;
2) and (3) paying off measurement:
a. checking whether the bus conforms to the drawing according to different conditions of bus and bracket laying;
b. measuring the installation position of a bus in the distribution box, and checking whether the safety distance between the position and other parts on the equipment meets the requirement;
c. measuring the processing size of each section of bus and the size of the bracket, and marking the mounting distance of the bracket or the mounting position of the fixing piece;
d. inspecting the insulator to ensure that the appearance of the insulator has no cracks or defects, and inspecting whether the bolt and the nut poured into the insulator are firm;
the method comprises the following specific operation steps:
4) and manufacturing and installing a support:
a. the bus support is made of angle steel and is fixed on a wall through an expansion bolt;
b. welding a cushion block on the angle steel, and punching holes on the cushion block, so that the insulator base is convenient to bolt;
2) and installing an insulator:
a. the insulator adopts an indoor high-voltage post insulator, insulation is measured by shaking before installation, and the insulator is qualified when the insulation resistance value is more than 1 megaohm;
b. the insulator fixing hardware fitting adopts a double-plate bus fixing hardware fitting, and the manufacturing specification of the insulator fixing hardware fitting is matched with the specification of a bus;
5) processing the bus:
a. the bus adopts double rows of copper buses, the bus straightening adopts a master tape straightener to straighten the bus, a wooden hammer is needed during manual straightening, and a railway is laid below the wooden hammer to operate, so that an iron hammer is not needed;
b. the bus is cut off by a handsaw or a grinding wheel saw, and the bus is not cut off by electric arc or acetylene;
c. the bus is bent in a cold bending mode, cracks cannot be formed at the bent part when the bending device is used for bending, and the length of the twisted part of the bus is 3 times of the width of the bus;
6) and (3) connecting the bus:
a. the bus adopts a bolt connection mode, and four bolt holes are drilled at the bus connection position; the flat washer is a thick washer and is matched with the spring pad, the bolt, the flat washer and the spring pad need to be galvanized, and the length of the bolt is 7mm after the bolt is fastened and the screw thread is exposed out of the nut;
b. the bus and the bus joint face should be tightly connected and kept flat and clean, and the outer surface layer is coated with electric composite grease;
c. when the rectangular bus is lapped, the distance from the joint to the edge of the supporting splint of the post insulator is 70mm, and the distance from the end of the upper bus to the flat bending start position of the lower bus is 70 mm;
3) bus bar mounting
The distance between the parallel parts of the bus is kept consistent and straight and neat, and the bus color mark is sleeved with yellow, green and red heat shrink sleeves; when the bus is installed, the horizontal section: the height error of the two supporting points is less than 3mm, the total length is 9mm, and the vertical section: the vertical error of the two support points is less than 2mm, and the total length is 5 mm;
7) checking power transmission
a. After the bus is installed, the bus needs to be comprehensively checked, and tools and sundries on a working site are cleaned;
b. before power transmission of the bus, a voltage withstand test is carried out, the bus below 500V can be shaken by a 500V shaking meter, and the insulation resistance is more than 0.5M omega;
c. checking whether the interface of the bus is tightly connected or not and whether the fastening torque value of the connecting bolt meets the requirement or not;
d. checking whether the fixation of the bus insulator and the bracket is firm, whether the installation position is correct, whether the distance is uniform and ensuring the surface cleanness of the insulator; wherein, still include: the specification of angle steel for manufacturing the bus bracket is 50 multiplied by 5, galvanized cushion blocks with the specification of 200 multiplied by 10 are welded on the angle steel, holes are drilled on each galvanized cushion block, and the specification of the holes is phi 18; the bus installation also needs to meet the condition that the gap between a plurality of rectangular bus pieces is equal to the thickness of the bus, a closed magnetic circuit is not formed by a middle fixing frame of the plurality of buses, and the used bolt threads are exposed out of the nut 3; when the bus support and other non-electrified metal parts grounding branches are laid, the connection is tight and firm, the bus direction is reasonable, and the color code is accurate.
In the above description, it should also be noted that:
a. the bent part of generating line strictly forbids breach and crackle, and bus insulator and support mounting should accord with: the position is correct, the fixation is firm, the installation is horizontal and vertical, the rows are arranged orderly, the intervals are uniform, and the color of paint is uniform;
b. the gasket for bus compression joint meets the specified requirements, and the thickened gasket is processed before the construction preparation stage;
c. a flat file is used at the joint (surface) of the bus for filing;
d. the bus bar must not be hot bent.
The outlets of the generators are connected by adopting a rectangular bus structure, the construction method is used for constructing the rectangular bus, reliable construction basis and technical guidance are provided, the bus installation is promoted to be rapidly and safely carried out by adopting a scientific construction method, the working efficiency is improved, the construction process is attractive, and the popularization is easy.
Claims (4)
1. A construction method of a rectangular bus at an outlet of a generator of a large-scale transformer substation comprises the following steps:
the preparation work includes:
1) preparing busbars, insulators, hardware fittings and the like required by construction, and counting the number of the busbars, the insulators, the hardware fittings and the like;
2) and (3) paying off measurement:
checking whether the bus conforms to the drawing according to different conditions of bus and bracket laying;
measuring the installation position of a bus in the distribution box, and checking whether the safety distance between the position and other parts on the equipment meets the requirement;
measuring the processing size of each section of bus and the size of the bracket, and marking the mounting distance of the bracket or the mounting position of the fixing piece;
inspecting the insulator to ensure that the appearance of the insulator has no cracks or defects, and inspecting whether the bolt and the nut poured into the insulator are firm;
the method comprises the following specific operation steps:
and (3) manufacturing and installing a support:
the bus support is made of angle steel and is fixed on a wall through an expansion bolt;
welding a cushion block on the angle steel, and punching holes on the cushion block, so that the insulator base is convenient to bolt;
2) and installing an insulator:
the insulator adopts an indoor high-voltage post insulator, insulation is measured by shaking before installation, and the insulator is qualified when the insulation resistance value is more than 1 megaohm;
the insulator fixing hardware fitting adopts a double-plate bus fixing hardware fitting, and the manufacturing specification of the insulator fixing hardware fitting is matched with the specification of a bus;
processing the bus:
the bus adopts double rows of copper buses, the bus straightening adopts a master tape straightener to straighten the bus, a wooden hammer is needed during manual straightening, and a railway is laid below the wooden hammer to operate, so that an iron hammer is not needed;
the bus is cut off by a handsaw or a grinding wheel saw, and the bus is not cut off by electric arc or acetylene;
the bus is bent in a cold bending mode, cracks cannot be formed at the bent part when the bending device is used for bending, and the length of the twisted part of the bus is 3 times of the width of the bus;
and (3) connecting the bus:
the bus adopts a bolt connection mode, and four bolt holes are drilled at the bus connection position; the flat washer is a thick washer and is matched with the spring pad, the bolt, the flat washer and the spring pad need to be galvanized, and the length of the bolt is 7mm after the bolt is fastened and the screw thread is exposed out of the nut;
the bus and the bus joint face should be tightly connected and kept flat and clean, and the outer surface layer is coated with electric composite grease;
c. when the rectangular bus is lapped, the distance from the joint to the edge of the supporting splint of the post insulator is 70mm, and the distance from the end of the upper bus to the flat bending start position of the lower bus is 70 mm;
3) bus bar mounting
The distance between the parallel parts of the bus is kept consistent and straight and neat, and the bus color mark is sleeved with yellow, green and red heat shrink sleeves; when the bus is installed, the horizontal section: the height error of the two supporting points is less than 3mm, the total length is 9mm, and the vertical section: the vertical error of the two support points is less than 2mm, and the total length is 5 mm;
4) checking power transmission
a. After the bus is installed, the bus needs to be comprehensively checked, and tools and sundries on a working site are cleaned;
b. before power transmission of the bus, a voltage withstand test is carried out, the bus below 500V can be shaken by a 500V shaking meter, and the insulation resistance is more than 0.5M omega;
c. checking whether the interface of the bus is tightly connected or not and whether the fastening torque value of the connecting bolt meets the requirement or not;
d. whether the bus insulator and the support are fixed firmly or not, whether the installation position is correct or not and whether the distance is even or not are checked, and the surface cleanness of the insulator is guaranteed.
2. The construction method of the rectangular bus of the generator outlet of the large-scale substation according to claim 1, characterized in that: the specification of the angle steel for manufacturing the bus support is as follows: the galvanized cushion blocks with the specification of 200x200x10 are welded on the angle steel by 50 x 5, and holes with the specification of phi 18 are punched in each galvanized cushion block.
3. The construction method of the rectangular bus of the generator outlet of the large-scale substation according to claim 1, characterized in that: the bus installation also needs to meet the condition that the gap between the rectangular bus pieces is equal to the thickness of the bus, the middle fixing frame of the rectangular bus pieces does not form a closed magnetic circuit, and the used bolt threads are exposed out of the nut 3.
4. The construction method of the rectangular bus of the generator outlet of the large-scale substation according to claim 1, characterized in that: when the bus support and other non-electrified metal parts grounding branches are laid, the connection is tight and firm, the bus direction is reasonable, and the color code is accurate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911138419.2A CN110718888A (en) | 2019-11-20 | 2019-11-20 | Construction method of rectangular bus at generator outlet of large-scale transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911138419.2A CN110718888A (en) | 2019-11-20 | 2019-11-20 | Construction method of rectangular bus at generator outlet of large-scale transformer substation |
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| Publication Number | Publication Date |
|---|---|
| CN110718888A true CN110718888A (en) | 2020-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911138419.2A Pending CN110718888A (en) | 2019-11-20 | 2019-11-20 | Construction method of rectangular bus at generator outlet of large-scale transformer substation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114447859A (en) * | 2022-03-25 | 2022-05-06 | 广东思科通用电力科技有限公司 | Anti-collision type equipotential outer PE bus duct and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004120974A (en) * | 2002-09-30 | 2004-04-15 | Toshiba Corp | Gas insulated switching device |
| CN105375344A (en) * | 2015-12-09 | 2016-03-02 | 福州万山电力咨询有限公司 | Mounting structure and method for 35kV inlet cable of intelligent substation |
| CN108539640A (en) * | 2018-05-22 | 2018-09-14 | 山西省工业设备安装集团有限公司 | A kind of installation method of power generation electrical-mechanical and lead-out wire |
-
2019
- 2019-11-20 CN CN201911138419.2A patent/CN110718888A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004120974A (en) * | 2002-09-30 | 2004-04-15 | Toshiba Corp | Gas insulated switching device |
| CN105375344A (en) * | 2015-12-09 | 2016-03-02 | 福州万山电力咨询有限公司 | Mounting structure and method for 35kV inlet cable of intelligent substation |
| CN108539640A (en) * | 2018-05-22 | 2018-09-14 | 山西省工业设备安装集团有限公司 | A kind of installation method of power generation electrical-mechanical and lead-out wire |
Non-Patent Citations (2)
| Title |
|---|
| 孙成群: "《建筑电气设备安装技术问答》", 30 June 2006, 中国电力出版社 * |
| 宋成贵: "《油气田地面工程实用施工技术 土建篇》", 30 April 2010, 中国石油大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114447859A (en) * | 2022-03-25 | 2022-05-06 | 广东思科通用电力科技有限公司 | Anti-collision type equipotential outer PE bus duct and using method thereof |
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Application publication date: 20200121 |