Wire uninterrupted ground wire ice melting system based on double ice melting buses

Abstract

The utility model discloses a lead uninterrupted ground wire ice melting system based on double ice melting buses, which comprises a plurality of towers, double ground wires connected between any adjacent towers, an ice melting power supply and two ice melting buses, and the two ice melting buses are connected between any adjacent towers and positioned below the double ground wires; the two ends of the ground wire of each ice melting section are connected with the two ice melting buses through lower leads, and the lower leads are provided with first disconnecting links. The two ice-melting buses are respectively connected with the positive end and the negative end of the ice-melting power supply through lead wires, and a second disconnecting link is arranged between the ice-melting buses of the adjacent ice-melting sections. According to the utility model, the arrangement of the double ice-melting buses increases the flexibility and reliability of the system, and through the cooperation with the disconnecting links at the corresponding positions, a suitable transformer substation can be flexibly selected as an ice-melting power supply according to an actual ice-melting section without considering the problem of lead connection erection in severe terrains; and the convenience of ice-melting wiring and the safety of ice-melting operation are improved.

Description

Technical Field

[0001] This utility model belongs to the field of ground wire de-icing technology, specifically relating to a conductor ground wire de-icing system based on a double de-icing busbar that does not require power interruption. Background Technology

[0002] Ice and snow accumulation, as a special meteorological condition, has severely impacted the safe operation of many overhead power transmission lines around the world. In my country, influenced by both macroclimate and micro-topography and micro-meteorological conditions, ice disasters also occur frequently. Severe icing of transmission line conductors and ground wires causes tower collapses and line breaks, resulting in significant damage to the power grid.

[0003] Because ground wires do not carry current in icy and snowy weather, they are more prone to icing than conductors. Analysis of damage from ice storms in recent years shows that icing often first damages or slips overhead ground wires and their supports, causing line tripping and outages, and subsequently leading to damage to transmission towers. Statistics show that ground wire faults account for a much higher proportion of line icing faults than conductor faults, making overhead ground wires the most vulnerable link in transmission lines. Therefore, achieving de-icing of overhead ground wires is of great significance for improving the overall anti-icing capability of transmission lines and ensuring the reliability of power supply.

[0004] Currently, ground wire de-icing involves directly connecting the ground wire of the de-icing section to a nearby mobile de-icing vehicle or substation (de-icing power supply) via a connecting line to form a de-icing circuit, thus achieving de-icing of the ground wire. This method has certain drawbacks: the de-icing section is generally a medium-to-heavy icing area with poor terrain conditions, making it difficult for mobile de-icing vehicles to reach the area. Furthermore, there may not be a substation nearby, requiring connection to a substation in a distant location. This results in excessively long connecting lines, increased installation difficulty, higher project investment, and higher safety risks. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of the aforementioned background technology and provide a conductor-based de-icing system with a dual de-icing busbar that does not require power interruption, thereby improving the efficiency and safety of de-icing operations.

[0006] The technical solution adopted by this utility model is: a conductor uninterrupted ground wire de-icing system based on double de-icing busbars, including several towers and double ground wires connected between any adjacent towers, and also includes a de-icing power supply and two de-icing busbars, wherein the two de-icing busbars are connected between any adjacent towers and located below the double ground wires;

[0007] The ground wires of each de-icing section are connected to two de-icing busbars at both ends via downleads, and a first disconnect switch is installed on the downlead.

[0008] The two de-icing busbars are connected to the positive and negative ends of the de-icing power supply via lead wires, and a second disconnect switch is installed between the de-icing busbars of adjacent de-icing sections.

[0009] Furthermore, the de-icing busbar is connected to the lower middle part of the tower.

[0010] Furthermore, the ice-melting busbar is connected to the tower via a busbar tension string.

[0011] Furthermore, the first disconnect switch is a grounding disconnect switch.

[0012] Furthermore, the de-icing power source is the substation closest to the de-icing section.

[0013] Furthermore, a grounded induced voltage suppression device is provided at the end of the lead wire closest to the de-icing power source.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention introduces a dual de-icing busbar, enabling de-icing of the ground wire without power outages. This significantly improves the efficiency and safety of de-icing operations and avoids the inconvenience caused to the power grid due to power outages during de-icing. Simultaneously, the dual de-icing busbar increases the system's flexibility and reliability. By cooperating with corresponding disconnectors, a suitable substation can be flexibly selected as the de-icing power source based on the actual de-icing section, eliminating the need to consider the issue of connecting lines in harsh terrain. This improves the convenience of de-icing wiring and the safety of de-icing operations.

[0016] This invention connects the de-icing busbar to the middle and lower part of the tower, which helps to reduce the height of the busbar and reduce the impact of natural factors such as wind and snow on the busbar. At the same time, this connection method is also easier to construct and maintain, reducing installation and operation costs.

[0017] This invention uses a busbar tension string to connect the de-icing busbar and the tower, which can enhance the stability and reliability of the connection. The tension string can withstand greater tension, ensuring that the busbar can maintain stable operation even under severe weather conditions. In addition, this connection method also helps to reduce the vibration and sway of the busbar and extend its service life.

[0018] This invention sets the first disconnect switch as a grounding disconnect switch, which can ground the ground wire when needed to ensure the safety of the workers; at the same time, the introduction of the grounding disconnect switch also increases the safety of the system and prevents electric shock accidents caused by misoperation or equipment failure.

[0019] This invention selects a substation closer to the de-icing section as the de-icing power source, which can greatly shorten the length of the lead wire, reduce the construction difficulty, and thus help improve the de-icing efficiency and ensure the smooth progress of the de-icing operation. In addition, selecting the nearest substation can also reduce the dispatching and operation pressure on the power grid.

[0020] This invention provides a grounded induced voltage suppression device at the end of the lead wire closest to the de-icing power supply. The induced voltage suppression device can absorb and disperse the energy of the induced voltage, effectively suppressing the generation and propagation of the induced voltage and protecting the safety of equipment and personnel. At the same time, the introduction of the induced voltage suppression device also helps to improve the stability and reliability of the system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the principle of one ice-melting section of this utility model.

[0022] Figure 2 This is a schematic diagram of the connection between the ground wire and the busbar on a single tower according to this utility model.

[0023] Figure 3 This is a schematic diagram of a complete ice-melting circuit of this utility model.

[0024] Figure 4 This is another schematic diagram of the complete ice-melting circuit of this utility model.

[0025] In the diagram: 1-Pole; 2-Ground wire; 3-De-icing busbar; 4-De-icing power supply; 5-Lower lead wire; 6-Connecting lead wire; 7-First disconnect switch; 8-Second disconnect switch; 9-Induced voltage suppression device; 10-Busbar tension string; 11-De-icing section; 12-Suspension string. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding of this utility model, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1-4 As shown, this utility model provides a conductor-based uninterrupted ground wire de-icing system based on dual de-icing busbars, including several towers 1 and dual ground wires 2 connected between any adjacent towers 1. The dual ground wires 2 are ground wire 2a and ground wire 2b, which are connected in parallel. It also includes a de-icing power supply 4 and two de-icing busbars 3, which are busbar 3a and busbar 3b. The two de-icing busbars 3 are connected between any adjacent towers 1 and located below the dual ground wires 2. The two ends of the ground wire 2 of each de-icing section 11 are connected to the two de-icing busbars 3 through a lower lead wire 5. A first disconnect switch 7 is installed on the lower lead wire 5. The two de-icing busbars 3 are connected to the positive and negative ends of the de-icing power supply 4 through a connecting lead wire 6. The de-icing busbars 3 of adjacent de-icing sections 11 are connected through a second disconnect switch 8.

[0028] Since the length of transmission lines often exceeds hundreds or even thousands of kilometers, this utility model divides the transmission line into multiple different de-icing sections 11. During the de-icing period, only a certain section is de-iced. The two ends of the double ground wire 2 of the de-icing section 11 are connected to the positive and negative ends of the de-icing power supply 4 through the lower lead wire 5, the first disconnect switch 7, two de-icing busbars 3, the second disconnect switch 8, and the connecting lead wire 6, forming a complete de-icing circuit. The de-icing power supply provides power to the de-icing system, realizing uninterrupted distributed de-icing of the conductors of long transmission lines.

[0029] This invention introduces a dual de-icing busbar 3, enabling de-icing of the ground wire without power outages. This significantly improves the efficiency and safety of de-icing operations and avoids the inconvenience caused to the power grid due to power outages during de-icing. At the same time, the dual de-icing busbar also increases the system's flexibility and reliability. By cooperating with the corresponding disconnect switches, a suitable substation can be selected as the de-icing power source based on the actual de-icing section, eliminating the need to consider the issue of connecting lines in harsh terrain.

[0030] In some embodiments, the de-icing busbar 3 is connected to the lower middle part of the tower 1. This invention connects the de-icing busbar 3 to the lower middle part of the tower 1, which helps to reduce the height of the busbar and minimize the impact of natural factors such as wind and snow on it. At the same time, this connection method is also easier to construct and maintain, reducing installation and operating costs.

[0031] In some embodiments, the connection method between the de-icing busbar and the tower can vary depending on the tower's structural form. When the tower is an angle tower, the de-icing busbar 3 is connected to the tower 1 via a busbar tension string 10. The busbar tension string 10 has the same structure as the ground wire tension string, both being conventional technologies, and will not be elaborated upon here. When the tower is a straight tower, the de-icing busbar 3 is connected to the tower 1 via a suspension string 12, which is also a conventional structure. This invention uses a busbar tension string 10 or a suspension string (suspension insulator string) 12 to connect the de-icing busbar 3 and the tower 1, which can enhance the stability and reliability of the connection. The tension string or suspension string can withstand greater tension, ensuring that the busbar maintains stable operation even under severe weather conditions. In addition, this connection method also helps to reduce the vibration and sway of the busbar, extending its service life.

[0032] In some embodiments, the first disconnect switch 7 is a single-pole double-throw grounding disconnect switch. By configuring the first disconnect switch 7 as a single-pole double-throw grounding disconnect switch, this invention allows for grounding of the ground wire when necessary, ensuring the safety of workers. Simultaneously, the introduction of the single-pole double-throw grounding disconnect switch also increases system safety, preventing electric shock accidents caused by misoperation or equipment malfunction.

[0033] In some embodiments, the second disconnector 8 is an isolating disconnector, which is a conventional single-pole single-throw switch device used to connect or disconnect the de-icing busbars. When multiple sections of de-icing busbars are needed for de-icing of a certain de-icing section, the second disconnector 8 is used to connect the multiple sections of de-icing busbars, making the line connection more convenient and faster.

[0034] In some embodiments, the location of the de-icing power source 4 can be flexibly selected from the nearest suitable power source based on the actual de-icing section. Preferably, the de-icing power source 4 is the substation closest to a certain de-icing section, in which case the substation can supply power to different de-icing sections as needed. This invention selects a substation closer to the de-icing section as the de-icing power source, which can greatly shorten the length of the lead wire, reduce the difficulty of de-icing wiring, and thus improve de-icing efficiency, ensuring the smooth progress of de-icing operations. Furthermore, selecting the nearest substation can reduce the dispatching and operational pressure on the power grid. The de-icing power source is not limited to a substation; a corresponding de-icing vehicle or other power supply equipment can also be selected.

[0035] like Figure 3 As shown, when there is a suitable de-icing power source 4 (substation) near the de-icing section 11a, the de-icing busbar 3 of the current section can be connected to the de-icing circuit through the downlead 5, the first disconnector 7, and the connecting lead 6. The second disconnectors 8 at both ends of the de-icing busbar of the current section are both in the open state. Figure 4 As shown, when there is no suitable de-icing power source (substation) near the de-icing section 11b, and the nearest de-icing power source is near the de-icing section 11a, the de-icing busbars 3 of multiple adjacent sections can be connected via the second disconnect switch 8. Then, the connection is made via the lead wire 6 to both ends of the de-icing power source 4 near section 11a, and connected to the ground wire 2 of section 11b to form a de-icing circuit for ground wire de-icing. In other words, the same de-icing power source can supply power to different de-icing sections as needed. This invention, through the installation of dual de-icing busbars 3 and the flexible selection of the de-icing power source 4, allows the same de-icing power source to be selected to supply power to different de-icing sections as needed, improving the convenience of de-icing wiring and the safety of de-icing operations.

[0036] In some embodiments, a grounded induced voltage suppression device 9 is provided at the end of the lead wire 6 near the de-icing power supply 4. The induced voltage suppression device 9 can be a conventional parallel resistor-capacitor scheme or a parallel high-resistance scheme. This invention provides a grounded induced voltage suppression device 9 at the end of the lead wire 6 near the de-icing power supply 4. The induced voltage suppression device 9 can absorb and disperse the energy of the induced voltage, effectively suppressing the generation and propagation of the induced voltage, protecting the safety of equipment and personnel; at the same time, the introduction of the induced voltage suppression device also helps to improve the stability and reliability of the system.

[0037] This utility model replaces the existing de-icing scheme that directly connects the conductor to the ground wire to form a de-icing circuit by erecting independent dual de-icing busbars 3 on the same tower. Combined with the flexible arrangement of grounding switches and multiple parallel connections of the ground wire, it forms a highly flexible distributed ground wire de-icing technology that can form de-icing circuits over long distances and across regions, efficiently covering key de-icing sections, improving the efficiency and safety of de-icing operations, and providing strong support for the stable operation of the power grid.

[0038] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Contents not described in detail in this specification belong to prior art known to those skilled in the art.

Claims

1. A conductor-based uninterrupted grounding system based on a double de-icing busbar, comprising several towers (1), a double grounding wire (2) connecting any adjacent towers (1), and a de-icing power supply (4), characterized in that: It also includes two de-icing busbars (3), which are connected between any adjacent towers (1) and located below the double ground wire (2); The ground wire (2) of each de-icing section is connected to two de-icing busbars (3) through the lower lead wire (5) at both ends, and the first disconnect switch (7) is installed on the lower lead wire (5); Two de-icing busbars (3) are connected to the positive and negative ends of the de-icing power supply (4) respectively through lead wires (6), and a second disconnect switch (8) is installed between the de-icing busbars (3) of adjacent de-icing sections.

2. The conductor de-energizing ground wire de-icing system based on dual de-icing busbars according to claim 1, characterized in that: The de-icing busbar (3) is connected to the lower middle part of the tower (1).

3. The conductor de-energizing ground wire de-icing system based on dual de-icing busbars according to claim 1, characterized in that: The ice-melting busbar (3) is connected to the tower (1) via the busbar tension string (10).

4. The conductor de-energizing ground wire de-icing system based on dual de-icing busbars according to claim 1, characterized in that: The first disconnect switch (7) is a grounding disconnect switch.

5. The conductor de-energizing ground wire de-icing system based on dual de-icing busbars according to claim 1, characterized in that: The de-icing power source (4) is the substation closest to the de-icing section.

6. The conductor de-energizing ground wire de-icing system based on dual de-icing busbars according to claim 1, characterized in that: The lead wire (6) is provided with a grounded induced voltage suppression device (9) at one end near the de-icing power source (4).

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