CN115498582B - Uninterrupted ground wire direct-current deicing system and uninterrupted ground wire direct-current deicing method for ultra-high voltage transmission line - Google Patents
Uninterrupted ground wire direct-current deicing system and uninterrupted ground wire direct-current deicing method for ultra-high voltage transmission line Download PDFInfo
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- CN115498582B CN115498582B CN202211294862.0A CN202211294862A CN115498582B CN 115498582 B CN115498582 B CN 115498582B CN 202211294862 A CN202211294862 A CN 202211294862A CN 115498582 B CN115498582 B CN 115498582B
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims description 11
- 238000002844 melting Methods 0.000 claims abstract description 130
- 230000008018 melting Effects 0.000 claims abstract description 127
- 230000005611 electricity Effects 0.000 claims abstract description 25
- 230000001629 suppression Effects 0.000 claims abstract description 16
- 230000003068 static effect Effects 0.000 claims abstract description 13
- 238000010309 melting process Methods 0.000 claims abstract description 10
- 238000009413 insulation Methods 0.000 claims abstract description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 32
- 229910052742 iron Inorganic materials 0.000 claims description 16
- 230000006698 induction Effects 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/16—Devices for removing snow or ice from lines or cables
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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
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/02—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for overhead lines or cables
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Abstract
The invention discloses an uninterrupted ground wire direct current deicing system for an extra-high voltage transmission line, which comprises a direct current deicing power module, a voltage suppression module, a positive electrode deicing access switch, a plurality of positive electrode ground wire arresters, a positive electrode deicing grounding switch, a positive electrode deicing grounding device, a negative electrode deicing access switch, a plurality of negative electrode ground wire arresters, a negative electrode deicing grounding switch, a negative electrode deicing grounding device and a deicing short circuit switch, wherein the direct current deicing power module is connected with the positive electrode ground wire arresters; the direct current ice melting power supply module supplies power; the voltage suppression module suppresses static electricity and induced electricity; the positive/negative electrode ice melting access switch is connected with the direct current ice melting power supply module and the positive/negative electrode ground wire; the positive/negative electrode ground wire lightning arrester ensures insulation and lightning protection of the positive/negative electrode ground wire; the positive/negative electrode ice melting grounding switch is connected with the positive/negative electrode ground wire and the positive/negative electrode ice melting grounding device; the positive/negative electrode ice melting grounding device ensures the safety of the ice melting process; the ice melting short circuit switch is short-circuited with the positive/negative electrode ground wire to form an ice melting loop. The invention has high reliability, good safety, convenience and practicability.
Description
Technical Field
The invention belongs to the field of electric automation, and particularly relates to a system and a method for DC ice melting of a uninterruptible ground wire of an ultra-high voltage transmission line.
Background
Along with the development of economic technology and the improvement of living standard of people, electric energy becomes an indispensable secondary energy source in the production and living of people, and brings endless convenience to the production and living of people. Therefore, ensuring stable and reliable supply of electric energy becomes one of the most important tasks of the electric power system.
The extra-high voltage transmission line is an important component of a transmission system in China and has the characteristics of high transmission power, long line distance, large line span and the like. Moreover, the extra-high voltage transmission line inevitably passes through ice-coating-prone areas such as high-altitude mountain areas, so that serious line ice coating is very easy to occur. Once the extra-high voltage transmission line is severely iced, accidents such as tripping, wire breakage and the like can be caused, and the safety of a large power grid is seriously endangered. The ground wire of the ultra-high voltage transmission line is generally positioned above the lead and does not flow current, so that compared with the lead, the ground wire is more susceptible to icing disasters; and once the ice is covered, the ice covering condition is generally more serious, and faults such as flashover, broken wires, tower material damage and the like are more easily caused. Therefore, it is very necessary to melt ice on the ground wire of the extra-high voltage transmission line.
However, the ground wires of the extra-high voltage transmission line are connected in different manners, so that the existing direct-current ice melting manner cannot be directly adopted for ice melting. Meanwhile, the following problems may occur in the ice melting stage: when the ground wire is subjected to ice melting, the running wire can generate static electricity or induced electricity on the ice melting loop, and the voltage can reach tens of kilovolts, so that the safety of surrounding equipment and personnel is affected; when the ground wire is subjected to deicing, the ground wire is required to be modified, and the modification work is very time-consuming and labor-consuming, and has low safety.
Disclosure of Invention
The invention aims to provide a uninterrupted ground wire direct current ice melting system for an ultra-high voltage transmission line, which is high in reliability, good in safety, convenient and practical.
The second purpose of the invention is to provide a method for the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line.
The uninterrupted ground wire direct current deicing system for the ultra-high voltage transmission line comprises a direct current deicing power module, a voltage suppression module, a positive electrode deicing access switch, a plurality of positive electrode ground wire arresters, a positive electrode deicing grounding switch, a positive electrode deicing grounding device, a negative electrode deicing access switch, a plurality of negative electrode ground wire arresters, a negative electrode deicing grounding switch, a negative electrode deicing grounding device and a deicing short circuit switch; the output positive electrode of the direct current deicing power supply module is connected with one end of a positive electrode ground wire through a positive electrode deicing access switch connected in series, the other end of the positive electrode ground wire is grounded through a positive electrode deicing grounding switch and a positive electrode deicing grounding device connected in series, and a plurality of positive electrode ground wire lightning arresters are respectively connected between the positive electrode ground wire and a plurality of iron towers; the output negative electrode of the direct current deicing power supply module is connected with one end of a negative electrode ground wire through a negative electrode deicing access switch connected in series, the other end of the negative electrode ground wire is grounded through a negative electrode deicing grounding switch and a negative electrode deicing grounding device connected in series, and a plurality of negative electrode ground wire lightning arresters are respectively connected between the negative electrode ground wire and a plurality of iron towers; the voltage suppression module is connected in parallel between an output positive electrode and an output negative electrode of the direct-current ice melting power supply module; the ice-melting short circuit switch is connected between the other end of the positive electrode ground wire and the other end of the negative electrode ground wire; the direct-current ice melting power supply module is used for providing a direct-current ice melting power supply during ice melting; the voltage suppression module is used for suppressing static electricity and induced electricity generated during ice melting, so that the normal operation of the direct-current ice melting power supply module is ensured, and the safety of the ice melting process is also ensured; the positive electrode ice melting access switch is used for connecting the direct current ice melting power supply module with a positive electrode ground wire; the positive ground wire lightning arrester is used for ensuring insulation between the positive ground wire and the iron tower, and does not reduce the lightning protection level of the positive ground wire; the positive electrode ice melting grounding switch is used for connecting a positive electrode ground wire with the positive electrode ice melting grounding device; the positive electrode ice melting grounding device is used for leading static electricity and induction electricity generated on a positive electrode ground wire during ice melting to the ground, so that the safety of an ice melting process is ensured; the negative electrode ice melting access switch is used for connecting the direct current ice melting power supply module with a negative electrode ground wire; the negative ground wire lightning arrester is used for ensuring insulation between the negative ground wire and the iron tower, and does not reduce the lightning protection level of the negative ground wire; the negative electrode ice melting grounding switch is used for connecting a negative electrode ground wire with the negative electrode ice melting grounding device; the negative electrode ice melting grounding device is used for leading static electricity and induction electricity generated on a negative electrode ground wire during ice melting to the ground, so that the safety of the ice melting process is ensured; the ice melting short circuit switch is used for shorting the positive electrode ground wire and the negative electrode ground wire, so that a loop of ice melting current is formed.
The direct-current ice melting power supply module is a power supply module with the model number of TGYRB/DX-10kV-1.2 kA.
The voltage suppression module is of the model YZ/JDGY-10 kV.
The positive ground wire arrester is an arrester with the model of BLQ/JDGY-10 kV.
The negative ground wire arrester is a BLQ/JDGY-10kV arrester.
The positive electrode ice melting grounding device is a grounding device with the model number of JDZZ/JDGY-10 kV.
The negative electrode ice melting grounding device is a grounding device with the model number of JDZZ/JDGY-10 kV.
The invention also discloses a method for the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line, which specifically comprises the following steps:
s1, determining a ground wire section of an extra-high voltage transmission line to be de-iced;
s2, arranging the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line to the ground wire section confirmed in the step S1;
S3, when ice melting is started, all the switches are closed, and a direct-current ice melting power supply module is started to start ice melting;
S4, stopping the work of the direct-current ice melting power supply module after the ice melting is completed, and turning off all the switches to finish the ice melting.
Step S2, arranging the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line to the ground wire section confirmed in step S1, and particularly, permanently arranging the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line to the ground wire section confirmed in step S1; or temporarily arranging the uninterrupted ground wire direct current deicing system for the ultra-high voltage transmission line to the ground wire section confirmed in the step S1, and dismantling the uninterrupted ground wire direct current deicing system for the ultra-high voltage transmission line after deicing is finished.
The uninterrupted ground wire direct current deicing system and method for the extra-high voltage transmission line provided by the invention eliminate the problems of static electricity and induction electricity generated by the extra-high voltage operation wire on the ground wire deicing loop, ensure the safety of personnel and equipment, realize uninterrupted ground wire deicing of the extra-high voltage wire and ensure the normal transportation of electric energy during deicing; the lightning protection level of the lead is not reduced after the insulation transformation of the extra-high voltage ground wire ice melting loop is realized, the operation safety of the lead in the lightning protection period is ensured, the difficult problem that personnel are required to go to the tower for operation or temporarily change the wire when the extra-high voltage ground wire ice melting loop is switched between the ice melting mode and the normal operation mode is solved, and the workload of the personnel is reduced; therefore, the invention has high reliability, good safety, convenience and practicability.
Drawings
FIG. 1 is a system schematic of the system of the present invention.
FIG. 2 is a schematic flow chart of the method of the present invention.
Detailed Description
A system schematic of the system of the present invention is shown in fig. 1: the invention provides an uninterrupted ground wire direct current deicing system for an extra-high voltage transmission line, which comprises a direct current deicing power module 1, a voltage suppression module 2, a positive electrode deicing access switch 3, a plurality of positive electrode ground wire lightning arresters (reference numerals 5 and 6 in the figure, only two are shown in the figure, and the number is equal to the number of iron towers in the specific implementation), a positive electrode deicing grounding switch 11, a positive electrode deicing grounding device 14, a negative electrode deicing access switch 4, a plurality of negative electrode ground wire lightning arresters (reference numerals 7 and 8 in the figure, only two are shown in the figure, and the number is equal to the number of iron towers in the specific implementation), a negative electrode deicing grounding switch 13, a negative electrode deicing grounding device 15 and a deicing short circuit switch 12; the output positive electrode of the direct current deicing power supply module is connected with one end of a positive electrode ground wire 9 through a positive electrode deicing access switch connected in series, the other end of the positive electrode ground wire is grounded through a positive electrode deicing grounding switch and a positive electrode deicing grounding device connected in series, and a plurality of positive electrode ground wire lightning arresters are respectively connected between the positive electrode ground wire and a plurality of iron towers; the output negative electrode of the direct current deicing power supply module is connected with one end of a negative electrode ground wire 10 through a negative electrode deicing access switch connected in series, the other end of the negative electrode ground wire is grounded through a negative electrode deicing grounding switch and a negative electrode deicing grounding device connected in series, and a plurality of negative electrode ground wire lightning arresters are respectively connected between the negative electrode ground wire and a plurality of iron towers; the voltage suppression module is connected in parallel between an output positive electrode and an output negative electrode of the direct-current ice melting power supply module; the ice-melting short circuit switch is connected between the other end of the positive electrode ground wire and the other end of the negative electrode ground wire; the direct-current ice melting power supply module is used for providing a direct-current ice melting power supply during ice melting; the voltage suppression module is used for suppressing static electricity and induced electricity generated during ice melting, so that the normal operation of the direct-current ice melting power supply module is ensured, and the safety of the ice melting process is also ensured; the positive electrode ice melting access switch is used for connecting the direct current ice melting power supply module with a positive electrode ground wire; the positive ground wire lightning arrester is used for ensuring insulation between the positive ground wire and the iron tower, and does not reduce the lightning protection level of the positive ground wire; the positive electrode ice melting grounding switch is used for connecting a positive electrode ground wire with the positive electrode ice melting grounding device; the positive electrode ice melting grounding device is used for leading static electricity and induction electricity generated on a positive electrode ground wire during ice melting to the ground, so that the safety of an ice melting process is ensured; the negative electrode ice melting access switch is used for connecting the direct current ice melting power supply module with a negative electrode ground wire; the negative ground wire lightning arrester is used for ensuring insulation between the negative ground wire and the iron tower, and does not reduce the lightning protection level of the negative ground wire; the negative electrode ice melting grounding switch is used for connecting a negative electrode ground wire with the negative electrode ice melting grounding device; the negative electrode ice melting grounding device is used for leading static electricity and induction electricity generated on a negative electrode ground wire during ice melting to the ground, so that the safety of the ice melting process is ensured; the ice melting short circuit switch is used for shorting the positive electrode ground wire and the negative electrode ground wire, so that a loop of ice melting current is formed.
In specific implementation, the direct-current ice melting power supply module is a power supply module with the model number of TGYRB/DX-10kV-1.2 kA; the voltage suppression module is of the model YZ/JDGY-10 kV; the positive ground wire lightning arrester is a type BLQ/JDGY-10kV lightning arrester; the negative ground wire lightning arrester is a type BLQ/JDGY-10kV lightning arrester; the positive electrode ice melting grounding device is a grounding device with the model number of JDZZ/JDGY-10 kV; the negative electrode ice melting grounding device is a grounding device with the model number of JDZZ/JDGY-10 kV.
The extra-high voltage transmission line comprises a plurality of iron towers, and a transmission wire and a ground wire are distributed on the left side and the right side of each iron tower; therefore, the system provided by the invention can melt ice of the whole section of the ultra-high voltage transmission line.
A schematic process flow diagram of the method of the present invention is shown in fig. 2: the invention also discloses a method for the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line, which specifically comprises the following steps:
s1, determining a ground wire section of an extra-high voltage transmission line to be de-iced;
s2, arranging the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line to the ground wire section confirmed in the step S1;
S3, when ice melting is started, all the switches are closed, and a direct-current ice melting power supply module is started to start ice melting;
S4, stopping the work of the direct-current ice melting power supply module after the ice melting is completed, and turning off all the switches to finish the ice melting.
In the specific implementation, in the step S2, the uninterruptible ground wire direct current ice melting system for the extra-high voltage transmission line is arranged in the ground wire section confirmed in the step S1, and in particular, the uninterruptible ground wire direct current ice melting system for the extra-high voltage transmission line is permanently arranged in the ground wire section confirmed in the step S1; or temporarily arranging the uninterrupted ground wire direct current deicing system for the ultra-high voltage transmission line to the ground wire section confirmed in the step S1, and dismantling the uninterrupted ground wire direct current deicing system for the ultra-high voltage transmission line after deicing is finished. According to the preferable scheme, the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line is permanently arranged in the section.
The invention utilizes the voltage suppression module, the positive/negative electrode ground wire arrester and the positive/negative electrode ice melting grounding device to realize direct current ice melting of the ground wire when the wire is not in power failure, has the characteristics of static electricity and low induction voltage of an ice melting loop when the line is in fault or operation mode switching, does not influence normal operation of the line when the line is in ice melting, has the characteristics of simple switching of the ground wire ice melting mode and the normal operation mode, and can be widely applied to extra-high voltage lines with the ground wire ice melting requirement.
Claims (8)
1. The uninterrupted ground wire direct current deicing system for the ultra-high voltage transmission line is characterized by comprising a direct current deicing power module, a voltage suppression module, an anode deicing access switch, a plurality of anode ground wire arresters, an anode deicing grounding switch, an anode deicing grounding device, a cathode deicing access switch, a plurality of cathode ground wire arresters, a cathode deicing grounding switch, a cathode deicing grounding device and a deicing short circuit switch; the output positive electrode of the direct current deicing power supply module is connected with one end of a positive electrode ground wire through a positive electrode deicing access switch connected in series, the other end of the positive electrode ground wire is grounded through a positive electrode deicing grounding switch and a positive electrode deicing grounding device connected in series, and a plurality of positive electrode ground wire lightning arresters are respectively connected between the positive electrode ground wire and a plurality of iron towers; the output negative electrode of the direct current deicing power supply module is connected with one end of a negative electrode ground wire through a negative electrode deicing access switch connected in series, the other end of the negative electrode ground wire is grounded through a negative electrode deicing grounding switch and a negative electrode deicing grounding device connected in series, and a plurality of negative electrode ground wire lightning arresters are respectively connected between the negative electrode ground wire and a plurality of iron towers; the voltage suppression module is connected in parallel between an output positive electrode and an output negative electrode of the direct-current ice melting power supply module; the ice-melting short circuit switch is connected between the other end of the positive electrode ground wire and the other end of the negative electrode ground wire; the direct-current ice melting power supply module is used for providing a direct-current ice melting power supply during ice melting; the voltage suppression module is used for suppressing static electricity and induced electricity generated during ice melting, so that the normal operation of the direct-current ice melting power supply module is ensured, and the safety of the ice melting process is also ensured; the positive electrode ice melting access switch is used for connecting the direct current ice melting power supply module with a positive electrode ground wire; the positive ground wire lightning arrester is used for ensuring insulation between the positive ground wire and the iron tower, and does not reduce the lightning protection level of the positive ground wire; the positive electrode ice melting grounding switch is used for connecting a positive electrode ground wire with the positive electrode ice melting grounding device; the positive electrode ice melting grounding device is used for leading static electricity and induction electricity generated on a positive electrode ground wire during ice melting to the ground, so that the safety of an ice melting process is ensured; the negative electrode ice melting access switch is used for connecting the direct current ice melting power supply module with a negative electrode ground wire; the negative ground wire lightning arrester is used for ensuring insulation between the negative ground wire and the iron tower, and does not reduce the lightning protection level of the negative ground wire; the negative electrode ice melting grounding switch is used for connecting a negative electrode ground wire with the negative electrode ice melting grounding device; the negative electrode ice melting grounding device is used for leading static electricity and induction electricity generated on a negative electrode ground wire during ice melting to the ground, so that the safety of the ice melting process is ensured; the ice melting short circuit switch is used for shorting the positive electrode ground wire and the negative electrode ground wire, so that a loop of ice melting current is formed.
2. The uninterruptible ground wire direct current deicing system for the ultra-high voltage transmission line according to claim 1, wherein the direct current deicing power module is a power module with the model number of TGYRB/DX-10kV-1.2 kA.
3. The uninterruptible ground wire direct current ice melting system for the ultra-high voltage transmission line according to claim 1, wherein the voltage suppression module is a voltage suppression module with the model number of YZ/JDGY-10 kV.
4. The uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line according to claim 1, wherein the positive ground wire lightning arrester is a type BLQ/JDGY-10kV lightning arrester.
5. The uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line according to claim 1, wherein the negative ground wire lightning arrester is a type BLQ/JDGY-10kV lightning arrester.
6. The uninterruptible ground wire direct current ice melting system for the ultra-high voltage transmission line according to claim 1, wherein the positive electrode ice melting grounding device is a grounding device with the model number of JDZZ/JDGY-10 kV.
7. The uninterruptible ground wire direct current ice melting system for the ultra-high voltage transmission line according to claim 1, wherein the negative electrode ice melting grounding device is a grounding device with the model number of JDZZ/JDGY-10 kV.
8. A method of the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line according to one of claims 1 to 7, specifically comprising the following steps:
s1, determining a ground wire section of an extra-high voltage transmission line to be de-iced;
s2, arranging the uninterrupted ground wire direct current ice melting system for the ultra-high voltage transmission line according to one of claims 1 to 7 to the ground wire section confirmed in the step S1;
S3, when ice melting is started, all the switches are closed, and a direct-current ice melting power supply module is started to start ice melting;
S4, stopping the work of the direct-current ice melting power supply module after the ice melting is completed, and turning off all the switches to finish the ice melting;
Step S2, arranging the uninterrupted ground wire direct current deicing system for the extra-high voltage transmission line according to one of claims 1 to 7 to the ground wire section confirmed in step S1, and particularly, permanently arranging the uninterrupted ground wire direct current deicing system for the extra-high voltage transmission line according to one of claims 1 to 7 to the ground wire section confirmed in step S1; or temporarily arranging the uninterrupted ground wire direct current deicing system for the ultra-high voltage transmission line according to one of claims 1 to 7 to the ground wire section confirmed in the step S1, and dismantling the uninterrupted ground wire direct current deicing system for the ultra-high voltage transmission line according to one of claims 1 to 7 after deicing is finished.
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| CN202211294862.0A CN115498582B (en) | 2022-10-21 | 2022-10-21 | Uninterrupted ground wire direct-current deicing system and uninterrupted ground wire direct-current deicing method for ultra-high voltage transmission line |
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| CN202211294862.0A CN115498582B (en) | 2022-10-21 | 2022-10-21 | Uninterrupted ground wire direct-current deicing system and uninterrupted ground wire direct-current deicing method for ultra-high voltage transmission line |
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| CN116885658B (en) * | 2023-09-08 | 2023-12-12 | 湖南防灾科技有限公司 | Uninterrupted ground wire ice melting method and processor for extra-high voltage transmission line |
| CN117175523B (en) * | 2023-11-03 | 2024-01-26 | 中国电力工程顾问集团西南电力设计院有限公司 | Method for inhibiting ice melting induced voltage of earth wire of uninterrupted AC line |
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