CN115498582A - Uninterrupted ground wire direct-current ice melting system and method for ultra-high voltage transmission line - Google Patents
Uninterrupted ground wire direct-current ice melting system and method for ultra-high voltage transmission line Download PDFInfo
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- CN115498582A CN115498582A CN202211294862.0A CN202211294862A CN115498582A CN 115498582 A CN115498582 A CN 115498582A CN 202211294862 A CN202211294862 A CN 202211294862A CN 115498582 A CN115498582 A CN 115498582A
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- 238000002844 melting Methods 0.000 title claims abstract description 178
- 230000008018 melting Effects 0.000 title claims abstract description 164
- 230000005540 biological transmission Effects 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims description 10
- 230000005611 electricity Effects 0.000 claims abstract description 25
- 230000001629 suppression Effects 0.000 claims abstract description 17
- 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
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 239000004020 conductor Substances 0.000 description 1
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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 a non-power-outage ground wire direct-current ice melting system for an ultra-high voltage transmission line, which comprises a direct-current ice melting power supply module, a voltage suppression module, a positive-pole ice melting access switch, a plurality of positive-pole ground wire arresters, a positive-pole ice melting grounding switch, a positive-pole ice melting grounding device, a negative-pole ice melting access switch, a plurality of negative-pole ground wire arresters, a negative-pole ice melting grounding switch, a negative-pole ice melting grounding device and an ice melting short-circuit switch; the direct-current ice melting power supply module supplies power; the voltage suppression module suppresses static electricity and induced electricity; the positive/negative pole ice melting access switch is connected with the direct current ice melting power supply module and the positive/negative pole ground wire; the positive/negative ground wire arrester ensures the insulation and lightning protection of the positive/negative ground wire; the positive/negative pole ice melting grounding switch is connected with the positive/negative pole ground wire and the positive/negative pole ice melting grounding device; the positive/negative pole ice melting grounding device ensures the safety of the ice melting process; the ice-melting short-circuit switch is in short circuit with the positive/negative ground wires 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 electrical automation, and particularly relates to a system and a method for de-electrifying ground wire direct-current de-icing for an ultra-high voltage transmission line.
Background
With the development of economic technology and the improvement of living standard of people, electric energy becomes essential secondary energy in production and life of people, and brings endless convenience to production and life of people. Therefore, ensuring stable and reliable supply of electric energy is one of the most important tasks of the power system.
The ultra-high voltage transmission line is an important component of a power transmission system in China and has the characteristics of large transmission power, long line distance, large line span and the like. In addition, the ultra-high voltage transmission line inevitably passes through the ice-coating-prone areas such as high-altitude mountain areas, and therefore severe line ice coating is very likely to occur. Once the extra-high voltage transmission line is seriously coated with ice, accidents such as tripping and disconnection 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 is not electrified, so that the ground wire is more easily influenced by icing disasters compared with the lead; once icing occurs, the icing condition is generally more serious, and faults such as flashover, wire breakage, tower material damage and the like are more easily caused. Therefore, the ice melting of the ground wire of the ultra-high voltage transmission line is very necessary.
However, because the ground wires of the extra-high voltage transmission lines are connected in different ways, the existing direct-current ice melting way cannot be directly adopted for ice melting. Meanwhile, the following problems may also occur at the ice-melting stage: when the ground wire is used for deicing, the running wire generates static electricity or induced electricity on a deicing loop, the voltage can reach tens of kilovolts, and the safety of surrounding equipment and personnel is influenced; when the ground wire is melted, the ground wire needs to be modified, and the modification work of the type is time-consuming and labor-consuming and has low safety.
Disclosure of Invention
One of the purposes of the invention is to provide a non-power-outage ground wire direct-current deicing system for an ultra-high voltage transmission line, which has high reliability and good safety and is convenient and practical.
The second purpose of the invention is to provide a method of the uninterrupted ground wire direct-current deicing system for the ultra-high voltage transmission line.
The uninterrupted ground wire direct-current ice melting system for the ultra-high voltage transmission line comprises a direct-current ice melting power supply module, a voltage suppression module, a positive pole ice melting access switch, a plurality of positive pole ground wire arresters, a positive pole ice melting grounding switch, a positive pole ice melting grounding device, a negative pole ice melting access switch, a plurality of negative pole ground wire arresters, a negative pole ice melting grounding switch, a negative pole ice melting grounding device and an ice melting short-circuit switch; the output positive pole of the direct-current ice melting power supply module is connected with one end of a positive ground wire through a serially connected positive ice melting access switch, the other end of the positive ground wire is grounded through a serially connected positive ice melting grounding switch and a positive ice melting grounding device, and a plurality of positive ground wire arresters are respectively connected between the positive ground wire and a plurality of iron towers; the output negative pole of the direct-current ice melting power supply module is connected with one end of a negative pole ground wire through a negative pole ice melting access switch which is connected in series, the other end of the negative pole ground wire is grounded through a negative pole ice melting grounding switch and a negative pole ice melting grounding device which are connected in series, and a plurality of negative pole ground wire lightning arresters are respectively connected between the negative pole ground wire and a plurality of iron towers; the voltage suppression module is connected in parallel between the output anode and the output cathode of the direct-current ice melting power supply module; the ice melting short-circuit switch is connected between the other end of the anode ground wire and the other end of the cathode 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 work of the direct-current ice melting power supply module is ensured, and the safety of the ice melting process is also ensured; the positive pole ice melting access switch is used for connecting the direct current ice melting power supply module with a positive pole ground wire; the positive ground wire arrester is used for ensuring the 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 pole ice melting grounding switch is used for connecting the positive pole ground wire with the positive pole ice melting grounding device; the positive pole ice melting grounding device is used for leading static electricity and induced electricity generated on a positive pole ground wire during ice melting into the ground, so that the safety of the ice melting process is ensured; the negative ice melting access switch is used for connecting the direct current ice melting power supply module with a negative ground wire; the negative ground wire arrester is used for ensuring the 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 pole ice melting grounding switch is used for connecting the negative pole ground wire with the negative pole ice melting grounding device; the negative pole ice melting grounding device is used for guiding static electricity and induced electricity generated on a negative pole ground wire during ice melting into the ground, so that the safety of the ice melting process is ensured; and the ice melting short-circuit switch is used for short-circuiting the anode ground wire and the cathode 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 of TGYRB/DX-10kV-1.2 kA.
The voltage suppression module is a voltage suppression module with the model number of YZ/JDGY-10 kV.
The positive ground wire arrester is the arrester with model number BLQ/JDGY-10 kV.
The negative ground wire arrester is the arrester with model number BLQ/JDGY-10 kV.
The anode ice melting grounding device is a grounding device with the model of JDZZ/JDGY-10 kV.
The negative pole ice-melting grounding device is a grounding device with the model of JDZZ/JDGY-10 kV.
The invention also discloses a method of 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 the ultra-high voltage transmission line to be de-iced;
s2, arranging the non-power-outage 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 starts, closing all switches, starting the direct-current ice melting power supply module, and starting ice melting;
and S4, after ice melting is finished, stopping the work of the direct-current ice melting power supply module, disconnecting all the switches and finishing the ice melting.
S2, arranging the non-outage ground wire direct-current deicing system for the ultra-high voltage transmission line to the ground wire section confirmed in the S1, specifically, permanently arranging the non-outage ground wire direct-current deicing system for the ultra-high voltage transmission line to the ground wire section confirmed in the S1; or temporarily arranging the non-power-outage 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 non-power-outage 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 the method for the extra-high voltage transmission line eliminate the problems of static electricity and induced electricity generated by the extra-high voltage running wire on the ground wire deicing loop, ensure the safety of personnel and equipment, realize the uninterrupted ground wire deicing of the extra-high voltage wire and ensure the normal transmission of electric energy during the deicing; the lightning protection level of the wire is not reduced after the insulation transformation of the ultra-high voltage ground wire ice melting loop is realized, the running safety of the wire in the lightning protection period is guaranteed, the problem that personnel need to go to the tower for operation or temporarily change the wire when the ultra-high voltage ground wire ice melting loop is switched between an ice melting mode and a normal running 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 diagram of the system of the present invention.
FIG. 2 is a schematic flow chart of the method of the present invention.
Detailed Description
FIG. 1 shows a system diagram of the system of the present invention: the invention provides a non-power-outage ground wire direct-current ice melting system for an ultra-high voltage transmission line, which comprises a direct-current ice melting power supply module 1, a voltage suppression module 2, a positive-electrode ice melting access switch 3, a plurality of positive-electrode ground wire arresters (the reference numerals 5 and 6 in the figure are drawn, only two positive-electrode ground wire arresters are drawn in the figure, the number of the positive-electrode ground wire arresters is equal to the number of iron towers in specific implementation, a positive-electrode ice melting grounding switch 11, a positive-electrode ice melting grounding device 14, a negative-electrode ice melting access switch 4, a plurality of negative-electrode ground wire arresters (the reference numerals 7 and 8 in the figure are drawn, only two negative-electrode ground wire arresters are drawn in the figure, the number of the negative-electrode ice melting grounding device is equal to the number of the iron towers in specific implementation, a negative-electrode ice melting grounding switch 13, a negative-electrode ice melting grounding device 15 and an ice melting short-circuit switch 12; the output positive pole of the direct-current ice melting power supply module is connected with one end of a positive ground wire 9 through a serially connected positive ice melting access switch, the other end of the positive ground wire is grounded through a serially connected positive ice melting grounding switch and a positive ice melting grounding device, and a plurality of positive ground wire arresters are respectively connected between the positive ground wire and a plurality of iron towers; the output negative pole of the direct-current ice melting power supply module is connected with one end of a negative ground wire 10 through a negative ice melting access switch which is connected in series, the other end of the negative ground wire is grounded through a negative ice melting grounding switch and a negative ice melting grounding device which are connected in series, and a plurality of negative ground wire arresters are respectively connected between the negative ground wire and a plurality of iron towers; the voltage suppression module is connected in parallel between the output positive electrode and the 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 anode ground wire and the other end of the cathode 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 work of the direct-current ice melting power supply module is ensured, and the safety of the ice melting process is also ensured; the positive ice melting access switch is used for connecting the direct current ice melting power supply module with a positive ground wire; the positive ground wire arrester is used for ensuring the 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 pole ice melting grounding switch is used for connecting the positive pole ground wire with the positive pole ice melting grounding device; the positive pole ice melting grounding device is used for leading static electricity and induced electricity generated on a positive pole ground wire during ice melting into the ground, so that the safety of the ice melting process is ensured; the negative ice melting access switch is used for connecting the direct current ice melting power supply module with a negative ground wire; the negative ground wire arrester is used for ensuring the 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 pole ice melting grounding switch is used for connecting the negative pole ground wire with the negative pole ice melting grounding device; the negative pole ice melting grounding device is used for guiding static electricity and induced electricity generated on a negative pole ground wire during ice melting into the ground, so that the safety of the ice melting process is ensured; the ice-melting short-circuit switch is used for short-circuiting the anode ground wire and the cathode ground wire, so that an ice-melting current loop is formed.
In specific implementation, the direct-current ice melting power supply module is a power supply module with the model of TGYRB/DX-10kV-1.2 kA; the voltage suppression module is a voltage suppression module with the model number of YZ/JDGY-10 kV; the positive ground wire arrester is a arrester with the model number of BLQ/JDGY-10 kV; the negative ground wire arrester is a arrester with the model number of BLQ/JDGY-10 kV; the anode ice melting grounding device is a grounding device with the model of JDZZ/JDGY-10 kV; the negative pole ice melting grounding device is a grounding device with the model of JDZZ/JDGY-10 kV.
The ultra-high voltage transmission line comprises a plurality of iron towers, and a transmission conductor and a ground wire are arranged on the left side and the right side of each iron tower; therefore, the system provided by the invention can melt ice of a whole section of the ultra-high voltage transmission line.
FIG. 2 is a schematic flow chart of the method of the present invention: the invention also discloses a method of 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 the ultra-high voltage transmission line to be de-iced;
s2, arranging the non-power-outage 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 starts, closing all switches, starting the direct-current ice melting power supply module, and starting ice melting;
and S4, after ice melting is finished, stopping the work of the direct-current ice melting power supply module, disconnecting all the switches and finishing the ice melting.
In specific implementation, the step S2 of arranging the uninterruptible ground wire dc ice melting system for the extra-high voltage transmission line to the ground wire section confirmed in the step S1, specifically, permanently arranging the uninterruptible ground wire dc ice melting system for the extra-high voltage transmission line to the ground wire section confirmed in the step S1; or temporarily arranging the non-power-outage 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 non-power-outage ground wire direct-current deicing system for the ultra-high voltage transmission line after deicing is finished. The preferred scheme of the invention is to arrange the non-power-off ground wire direct-current deicing system aiming at the ultra-high voltage transmission line into a section permanently.
The direct-current deicing device has the characteristics that the static electricity and the induced voltage of a deicing loop are low when a line fails or the operation mode is switched, the normal operation of the line is not influenced when the ice is melted, and the switching between the ground wire deicing mode and the normal operation mode is simple, so that the direct-current deicing device can be widely applied to the ultra-high voltage line with the ground wire deicing requirement.
Claims (8)
1. A non-power-outage ground wire direct-current ice melting system for an ultra-high voltage transmission line is characterized by comprising a direct-current ice melting power supply module, a voltage suppression module, a positive pole ice melting access switch, a plurality of positive pole ground wire arresters, a positive pole ice melting grounding switch, a positive pole ice melting grounding device, a negative pole ice melting access switch, a plurality of negative pole ground wire arresters, a negative pole ice melting grounding switch, a negative pole ice melting grounding device and an ice melting short-circuit switch; the output positive pole of the direct-current ice melting power supply module is connected with one end of a positive ground wire through a serially connected positive ice melting access switch, the other end of the positive ground wire is grounded through a serially connected positive ice melting grounding switch and a positive ice melting grounding device, and a plurality of positive ground wire arresters are respectively connected between the positive ground wire and a plurality of iron towers; the output negative pole of the direct-current ice melting power supply module is connected with one end of a negative ground wire through a serially connected negative ice melting access switch, the other end of the negative ground wire is grounded through a serially connected negative ice melting grounding switch and a negative ice melting grounding device, and a plurality of negative ground wire arresters are respectively connected between the negative ground wire and a plurality of iron towers; the voltage suppression module is connected in parallel between the output positive electrode and the 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 ground wire and the other end of the negative 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 work of the direct-current ice melting power supply module is ensured, and the safety of the ice melting process is also ensured; the positive pole ice melting access switch is used for connecting the direct current ice melting power supply module with a positive pole ground wire; the positive ground wire arrester is used for ensuring the 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 pole ice melting grounding switch is used for connecting the positive pole ground wire with the positive pole ice melting grounding device; the positive pole ice melting grounding device is used for leading static electricity and induced electricity generated on a positive pole ground wire during ice melting into the ground, so that the safety of the ice melting process is ensured; the negative ice melting access switch is used for connecting the direct current ice melting power supply module with a negative 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 pole ice melting grounding switch is used for connecting the negative pole ground wire with the negative pole ice melting grounding device; the negative pole ice melting grounding device is used for guiding static electricity and induced electricity generated on a negative pole ground wire during ice melting into the ground, so that the safety of the ice melting process is ensured; the ice-melting short-circuit switch is used for short-circuiting the anode ground wire and the cathode ground wire, so that an ice-melting current loop is formed.
2. The uninterruptible ground wire direct current deicing system for the extra-high voltage transmission line according to claim 1, characterized in that the direct current deicing power module is a power module with a model number of TGYRB/DX-10kV-1.2 kA.
3. The system for melting ice on non-power-outage ground wire of an extra-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 system for de-icing an extra-high voltage transmission line by using the non-power-outage ground wire direct current according to claim 1, characterized in that the positive ground wire lightning arrester is a lightning arrester with the model number of BLQ/JDGY-10 kV.
5. The system for melting ice on the non-power-outage ground wire of the ultra-high voltage transmission line according to claim 1, wherein the negative ground wire lightning arrester is a lightning arrester with the model number of BLQ/JDGY-10 kV.
6. The system for melting ice on non-power-outage ground wire of ultra-high voltage transmission line according to claim 1, characterized in that the grounding device for melting ice on positive electrode is a grounding device with model number JDZZ/JDGY-10 kV.
7. The system for melting ice on non-power-outage ground wire of ultra-high voltage transmission line according to claim 1, characterized in that the grounding device for melting ice on negative electrode is a grounding device with model number JDZZ/JDGY-10 kV.
8. The method for the uninterruptible ground wire direct-current deicing system for the extra-high voltage transmission line according to any one of claims 1 to 7 comprises the following steps:
s1, determining a ground wire section of the ultra-high voltage transmission line to be de-iced;
s2, arranging the non-outage 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 starts, closing all switches, starting the direct-current ice melting power supply module, and starting ice melting;
and S4, after ice melting is finished, stopping the work of the direct-current ice melting power supply module, disconnecting all the switches and finishing the ice melting.
Step S2, the non-outage ground wire direct-current deicing system for the ultra-high voltage transmission line, described in one of claims 1 to 7, is arranged in the ground wire section confirmed in step S1, specifically, the non-outage ground wire direct-current deicing system for the ultra-high voltage transmission line, described in one of claims 1 to 7, is permanently arranged in the ground wire section confirmed in step S1; or temporarily arranging the non-power-outage ground wire direct-current deicing system for the ultra-high voltage transmission line as defined in one of claims 1 to 7 to the ground wire section confirmed in the step S1, and dismantling the non-power-outage ground wire direct-current deicing system for the ultra-high voltage transmission line as defined in 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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Cited By (2)
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| CN116885658A (en) * | 2023-09-08 | 2023-10-13 | 湖南防灾科技有限公司 | Uninterrupted ground wire ice melting method and processor for extra-high voltage transmission line |
| CN117175523A (en) * | 2023-11-03 | 2023-12-05 | 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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|---|---|---|---|---|
| CN116885658A (en) * | 2023-09-08 | 2023-10-13 | 湖南防灾科技有限公司 | Uninterrupted ground wire ice melting method and processor for extra-high voltage transmission line |
| 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 |
| CN117175523A (en) * | 2023-11-03 | 2023-12-05 | 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 |
| 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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| CN115498582B (en) | 2024-06-11 |
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