CN112582174A - High-voltage capacitor for load test of railway traction substation and test method - Google Patents
High-voltage capacitor for load test of railway traction substation and test method Download PDFInfo
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- CN112582174A CN112582174A CN202011393015.0A CN202011393015A CN112582174A CN 112582174 A CN112582174 A CN 112582174A CN 202011393015 A CN202011393015 A CN 202011393015A CN 112582174 A CN112582174 A CN 112582174A
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- capacitor
- shell
- box shell
- voltage
- railway traction
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/38—Multiple capacitors, i.e. structural combinations of fixed capacitors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/228—Terminals
- H01G4/236—Terminals leading through the housing, i.e. lead-through
Abstract
The invention belongs to the technical field of railway electric power, and discloses a high-voltage capacitor for a load test carried by railway traction substation, which comprises a plurality of capacitor groups, wherein each capacitor group comprises a shell and a plurality of identical capacitors arranged in the shell, fixed plates are arranged on two sides of the top of the shell, each capacitor comprises a box shell, a plurality of elements and an insulating part, the elements and the insulating parts are arranged in the box shell, the box shell is made by sealing and welding steel plates, a box shell cover is arranged above the box shell, an outgoing line porcelain bushing is welded on the box shell cover, a hand climbing is fixedly arranged on the side wall of the box shell, the hand climbing is fixed on the fixed plates through bolts, grounding bolts are arranged on the box shell cover, grounding bolts on different capacitors are connected together through metal connecting sheets, and the capacitors in the capacitor groups are connected together. According to the invention, the high-voltage capacitors are arranged in groups, and the capacitor bank is light in weight, portable and convenient to transport, so that the capacitor bank is suitable for being used under complex road conditions of a railway substation.
Description
Technical Field
The invention belongs to the technical field of railway electric power, and particularly relates to a high-voltage capacitor for a load test of a railway traction substation and a test method.
Background
With the continuous improvement of the voltage grade of a railway traction power supply system, the voltage grade of the railway traction power supply system is gradually increased from an original 110kV system to a 220kV power system, and reaches a 330kV power system in northwest regions, the continuous improvement of the voltage grade of the railway traction system proves that the requirements on the capacity and the reliability of a power supply are higher, and the influence surface on a power grid is gradually increased. The railway belongs to a first-level load, two power supplies are required to be arranged at a user station and taken from two different system stations, and an independent special interval and a special line are configured in the system stations to supply power to a railway user traction station. According to the requirements of the relay protection and power grid safety automatic device inspection regulations, newly installed equipment must be detected to ensure that the equipment can work normally after being connected into a system.
The railway traction power supply system is greatly different from a power system, after the newly operated railway user station transformer is unloaded for 24 hours, it is basically infeasible to have a load test with the actual train charge, because of the commissioning procedure of the railway traction power supply system, the power can be supplied to the contact net after the traction substation is powered on, and the train can be connected and disconnected after the contact net is powered on, in the whole operation process, the train can be normally received and dispatched only through a series of procedures of checking bow net relation through cold and hot slip, checking current receiving condition through heavy load, joint debugging joint test and the like, and because the railway load is dynamic and does not continuously load, the starting of the train in the load test when the power supply interval of each traction substation influences the operation of the substation is not easy to be completed, but the basic requirements of the power system can not be met without carrying out the load test, and is also not stringent for subscriber station systems, and therefore new solutions are needed to improve the load tests for new commissioning stations.
Disclosure of Invention
The invention overcomes the defects of the prior art, and solves the technical problems that: the high-voltage capacitor for the load test of the railway traction substation is used as the load of the load test of a new commissioning station.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a high-voltage capacitor for load test that railway traction substation takes, includes a plurality of capacitor banks, every capacitor bank includes the casing and sets up a plurality of the same condensers in the casing, casing top both sides are provided with the fixed plate, the condenser includes the case shell and sets up a plurality of component and the insulating part in case shell inside, the case shell is made for steel sheet seal welding, and the case shell top is provided with the case lid, has welded the porcelain bushing of being qualified for the next round of competitions on the case lid, and the case shell lateral wall is fixed to be provided with the hand and climbs, the hand is climbed through the bolt fastening on the fixed plate, is equipped with ground bolt on the case lid, and ground bolt on the different condenser links together through the metal connecting piece, the condenser in each capacitor bank passes through wire parallel connection and is.
The high-voltage capacitor for the load test of the railway traction substation comprises 4 capacitor groups, wherein 5 capacitors are arranged in each capacitor group, and the rated alternating voltage of the capacitor is 27.5kV, and the rated capacity of the capacitor is 10000 kVar.
The distance between the capacitor banks is less than 500 mm.
The high-voltage capacitor for the load test of the railway traction substation further comprises support legs arranged at the bottom of the shell.
The shell is formed by welding angle steel and steel plates, the angle steel is arranged on each edge of the shell, and the support legs are I-shaped steel.
The high-voltage capacitor for the load test of the railway traction substation further comprises a protective cover, wherein the protective cover is arranged above the fixing plate and used for protecting the capacitor in transportation.
In addition, the invention also provides a load test method for railway traction substation, which adopts the high-voltage capacitor and comprises the following steps:
s1, transporting each capacitor bank to a test position;
s2, after the capacitor bank is placed at a proper position, the high-voltage output end is adopted (25 mm)2) The bare copper wires are tightly connected with the high-voltage ends of the capacitors, and the wiring is properly bent to prevent the capacitor insulators from being damaged by over-tightening; no cross exists, and the insulation distance between the electrodes of the capacitor and the shell is ensured; the capacitor groups are connected by a 600A special connecting wire;
s3, carrying out a load test after the wiring is finished;
s4, after the test is completed, the wiring is removed and the capacitor pack is transported to the next test site.
In step S2, the capacitor banks are placed in a vertical or side-by-side manner according to the space situation in the field.
In step S2, when the wire connectors are connected, the contact surface is required to be smooth and free of oxidation, and when the wire connecting noses or copper bars are connected, the contact surface is cleaned, then the conductive paste is applied, and then the wire connecting noses or the copper bars are fastened.
Compared with the prior art, the invention has the following beneficial effects: the invention provides a high-voltage capacitor for a load test carried by railway traction transformation, wherein the capacitor is discharged through a secondary coil of a tested transformer, and switching-on and switching-off are carried out on a high-voltage side in the operation process. Under the condition of ensuring safety, a discharge coil is not used any more, and the weight of the capacitor bank is reduced. The high-voltage capacitors are arranged in groups, and the capacitor bank is light in weight, portable and convenient to transport, so that the capacitor bank is suitable for being used under complex road conditions of a railway substation; the protective agent has superiority in protecting finished products of the newly-built transformer substation, and the access road and the curb stones of the newly-built transformer substation can be well protected and can be used under any condition without being influenced by weather and environment. When testing various differential protection of the system station, the capacity allocation is related to the user station secret, so that various functions of the user station protection system, the integrity of the ground network and the correction traction power supply system can be tested. In addition, the capacitor bank mainly adopts the capacitor with the rated voltage of a railway special voltage system, and the utilization rate of the capacitor is high; the capacitor bank formed by the divisible capacitors with air as a medium is high in safety, not only is the system safe, but also the safety test scheme of the product is safe and controllable.
Drawings
FIG. 1 is a schematic structural diagram of a capacitor bank according to an embodiment of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a schematic structural diagram of a capacitor according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a capacitor bank with a protective cover according to an embodiment of the present invention;
in the figure: 1 is the casing, 2 is the condenser, 3 is the case shell, 4 is the case shell lid, 5 is the insulator of being qualified for the next round of competitions, 6 is the hand climbs, 7 is the earth bolt, 8 is the metal connecting piece, 9 is the fixed plate, 10 is the stabilizer blade, 11 is the angle steel, 12 is the steel sheet, 13 is the terminal of M16, 14 is the protection casing.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments; all other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, the embodiment of the invention provides a high-voltage capacitor for a load test of a railway traction substation, which comprises 4 capacitor groups, each capacitor group comprises a shell 1 and 5 identical capacitors 2 arranged in the shell, the two sides of the top of the shell 1 are provided with fixing plates 9, the capacitor 2 comprises a box shell 3 and a plurality of elements and insulating pieces which are arranged inside the box shell 3, the box shell 3 is made of steel plates through sealing welding, a box shell cover 4 is arranged above the box shell 3, a wire outlet porcelain bushing 5 is welded on the box shell cover 4, a handle 6 is fixedly arranged on the side wall of the box shell 3, the hand climber 6 is fixed on the fixing plate 7 through bolts, the case cover 4 is provided with grounding bolts 7, the grounding bolts 7 on different capacitors 2 are connected together through metal connecting sheets 8, and the capacitors in each capacitor bank are connected together in parallel through conducting wires.
Specifically, in the present embodiment, the specification of the capacitor: 27.5kV-500 kVar-1W; its rated alternating voltage 27.5kV, test voltage: 33kV (AC/1 min); rated capacity 500kVar ± 5%, size of single capacitor: (605 +35 x 2) (L). times.165 (W). times.625 +400 (H) mm3. In the embodiment, the capacitor insulating medium is made of imported polypropylene film materials, so that the stability of long-term reliable operation of the capacitor is ensured. The capacitor adopts a full-sealing structure form, and the capacitor core body is isolated from the outside and cannot be influenced by air and moisture. The capacitor ensures the oil level in the capacitor through proper expansion and contraction of the shell, and avoids influencing the operation. The capacitor wiring end is connected by a flexible wire to prevent the insulator porcelain bottle from being damaged by connection and oil leakage.
In particular, the distance between the capacitor banks was less than 500mm when tested.
Specifically, as shown in fig. 1, the high-voltage capacitor for load tests in railway traction substations provided in this embodiment further includes a support leg 10 disposed at the bottom of the housing 1.
Further, in this embodiment, the housing 1 is formed by welding an angle steel 11 and a steel plate 12, the angle steel is located on each side of the housing 1, and the support leg 10 is an i-shaped steel.
Further, as shown in fig. 5, the high-voltage capacitor for load test of railway traction substation provided by the present embodiment further includes a protective cover 14, where the protective cover 14 is disposed above the fixing plate 9 and used for protecting the capacitor portion located outside the housing during transportation.
Specifically, the embodiment further provides a load test method for a railway traction substation, which adopts the high-voltage capacitor, and is characterized by comprising the following steps:
s1, transporting each capacitor bank to a test position;
s2, after the capacitor bank is placed at a proper position, the high-voltage output end is adopted (25 mm)2) The bare copper wires are tightly connected with the high-voltage ends of the capacitors, and the wiring is properly bent to prevent the capacitor insulators from being damaged by over-tightening; and the capacitor has no cross, so that the insulation distance between electrodes of the capacitor and the shell is ensured. The container group adopts 600A (25 mm)2) Connecting with a special connecting wire; the fastening wiring is moderate in force, so that the bolt and the nut are prevented from being slipped and buckled due to excessive force, the slipped and buckled nut is timely replaced, and the operation is strictly forbidden.
The capacitor bank can be placed longitudinally, side by side, in series or in parallel according to the field space condition; the placing distance of the capacitor bank is as small as possible (less than 500 mm).
And S3, carrying out a load test after the wiring is finished.
S4, after the test is completed, the wiring is removed and the capacitor pack is transported to the next test site.
When the nut which is difficult to disassemble is found during the wire disassembling, the nut is not required to be repeatedly disassembled, deformation is prevented from being caused, and the nut is difficult to disassemble, and a screw loosening agent, dilute hydrochloric acid and the like are added for later disassembling. In addition, the vice is not allowed to fasten or loosen the nut to prevent damage, and the opening is adjusted when the shifting wrench is used to prevent the nut from being damaged and deformed to prevent difficult disassembly and assembly. Moreover, when the lead connectors or the lead noses are connected with each other, a gasket which is not made of copper or has poor electric conductivity is strictly forbidden to be arranged in the middle. When the lead connectors are connected, the contact surface is required to be smooth and free of oxidation, and when the wiring noses or the copper bars are connected, the contact surface can be cleaned, then the conductive paste is smeared, and then fastening is carried out.
The invention provides a high-voltage capacitor for a load test carried by railway traction transformation, wherein the capacitor is discharged through a secondary coil of a tested transformer, and switching-on and switching-off are carried out on a high-voltage side in the operation process. Under the condition of ensuring safety, a discharge coil is not used any more, and the weight of the capacitor bank is reduced. The high-voltage capacitors are arranged in groups, and the capacitor bank is light in weight, portable and convenient to transport, so that the capacitor bank is suitable for being used under complex road conditions of a railway substation; the protective agent has superiority in protecting finished products of the newly-built transformer substation, and the access road and the curb stones of the newly-built transformer substation can be well protected and can be used under any condition without being influenced by weather and environment. When testing various differential protection of the system station, the capacity allocation is related to the user station secret, so that various functions of the user station protection system, the integrity of the ground network and the correction traction power supply system can be tested. In addition, the capacitor bank mainly adopts the capacitor with the rated voltage of a railway special voltage system, and the utilization rate of the capacitor is high; the capacitor bank formed by the divisible capacitors with air as a medium is high in safety, not only is the system safe, but also the safety test scheme of the product is safe and controllable.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. The high-voltage capacitor for the load test of the railway traction substation is characterized by comprising a plurality of capacitor banks, wherein each capacitor bank comprises a shell (1) and a plurality of identical capacitors (2) arranged in the shell, fixing plates (9) are arranged on two sides of the top of the shell (1), each capacitor (2) comprises a box shell (3), a plurality of elements and an insulating piece, the elements and the insulating pieces are arranged in the box shell (3), the box shell (3) is made of steel plates through sealing and welding, a box shell cover (4) is arranged above the box shell (3), an outgoing line porcelain bushing (5) is welded on the box shell cover (4), a hand climber (6) is fixedly arranged on the side wall of the box shell (3), the hand climbers (6) are fixed on the fixing plates (7) through bolts, grounding bolts (7) are arranged on the box shell cover (4), the grounding bolts (7) on different capacitors (2) are connected together through metal connecting pieces (8), and the capacitors in each capacitor group are connected together in parallel through a lead.
2. The high-voltage capacitor for the load test of the railway traction substation of claim 1, wherein the capacitor comprises 4 capacitor groups, 5 capacitors are arranged in each capacitor group, the rated alternating voltage of the capacitor is 27.5kV, and the rated capacity of the capacitor is 10000 kVar.
3. The high-voltage capacitor for load testing in a railway traction substation area according to claim 1, wherein the distance between said capacitor banks is less than 500 mm.
4. The high-voltage capacitor for the load test of the railway traction substation according to claim 1, further comprising a support leg (10) disposed at the bottom of the housing (1).
5. The high-voltage capacitor for the load test of the railway traction substation according to claim 4, wherein the shell (1) is formed by welding angle steel and steel plates, the angle steel is arranged on each side of the shell, and the support legs (10) are I-shaped steel.
6. The high-voltage capacitor for load tests in railway traction substations as claimed in claim 1, characterized by further comprising a protective cover (14), the protective cover (14) being arranged above the fixing plate (9) for protecting the capacitor during transportation.
7. A method for testing a load in a railway traction substation, which is characterized in that the high-voltage capacitor according to any one of claims 1 to 6 is used, and the method comprises the following steps:
s1, transporting each capacitor bank to a test position;
s2, after the capacitor bank is placed at a proper position, the high-voltage output end adopts a height of 25mm2The bare copper wires with the specification are tightly connected with the high-voltage end of each capacitor, and the wiring is properly bent to prevent the capacitor insulators from being damaged by over-tightening; no cross exists, and the insulation distance between the electrodes of the capacitor and the shell is ensured; the capacitor groups are connected by a 600A special connecting wire;
s3, carrying out a load test after the wiring is finished;
s4, after the test is completed, the wiring is removed and the capacitor pack is transported to the next test site.
8. The method for testing the load on the railway traction substation area according to claim 7, wherein in step S2, the capacitor banks are placed in a vertical or side-by-side arrangement according to the space situation on site.
9. The method for testing the load on the railway traction substation belt according to claim 7, wherein in step S2, when the wire connectors are connected, the contact surface is required to be smooth and free from oxidation, and when the wire connecting noses or copper bars are connected, the contact surface is cleaned, then the conductive paste is applied, and then the fastening is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011393015.0A CN112582174A (en) | 2020-12-02 | 2020-12-02 | High-voltage capacitor for load test of railway traction substation and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011393015.0A CN112582174A (en) | 2020-12-02 | 2020-12-02 | High-voltage capacitor for load test of railway traction substation and test method |
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| Publication Number | Publication Date |
|---|---|
| CN112582174A true CN112582174A (en) | 2021-03-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011393015.0A Pending CN112582174A (en) | 2020-12-02 | 2020-12-02 | High-voltage capacitor for load test of railway traction substation and test method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201429507Y (en) * | 2009-01-09 | 2010-03-24 | 丁艳巍 | Locomotive power-supply load test detection device |
| CN202487411U (en) * | 2012-03-02 | 2012-10-10 | 中国西电电气股份有限公司 | Integral prevention and protection capacitor |
| CN107134368A (en) * | 2017-04-26 | 2017-09-05 | 合容电气股份有限公司 | 110kV Assembled high-voltage shunted capacitors |
| CN206711766U (en) * | 2017-04-28 | 2017-12-05 | 合容电气股份有限公司 | A kind of structure for being used to reduce capacitor noise |
-
2020
- 2020-12-02 CN CN202011393015.0A patent/CN112582174A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201429507Y (en) * | 2009-01-09 | 2010-03-24 | 丁艳巍 | Locomotive power-supply load test detection device |
| CN202487411U (en) * | 2012-03-02 | 2012-10-10 | 中国西电电气股份有限公司 | Integral prevention and protection capacitor |
| CN107134368A (en) * | 2017-04-26 | 2017-09-05 | 合容电气股份有限公司 | 110kV Assembled high-voltage shunted capacitors |
| CN206711766U (en) * | 2017-04-28 | 2017-12-05 | 合容电气股份有限公司 | A kind of structure for being used to reduce capacitor noise |
Non-Patent Citations (1)
| Title |
|---|
| 沪昆铁路客运专线湖南有限责任公司: "牵引供电", 《高速铁路四电及相关专业接口参考手册》 * |
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Application publication date: 20210330 |