CN107359578B - Active anti-icing transmission line system - Google Patents

Abstract

The invention discloses an active anti-icing power transmission line system, which comprises a power transmission line connected between line towers and an anti-icing cover cylinder covered on the power transmission line, wherein each line tower is provided with an anti-icing liquid tank, and anti-icing liquid is contained in the anti-icing liquid tank; the anti-icing liquid box is higher than the power transmission line, is of a closed structure, is upwards connected with a gas release pipe at the top end of the anti-icing liquid box, is connected with a liquid inlet pipe at the upper part of the anti-icing liquid box, and is provided with a liquid inlet valve at the bottom part; the bottom of the anti-icing fluid tank is connected with an anti-icing fluid pipe, and the other end of the anti-icing fluid pipe is communicated with an anti-icing fluid groove at the topmost end of the upper cover cylinder. The active anti-icing power transmission line system is simple in structure and convenient to install and use, and can be started according to weather forecast before rainy and snowy weather, so that active anti-icing of the power transmission line is effectively realized, and damage caused by excessive icing of the power transmission line is avoided.

Description

Active anti-icing transmission line system

technical field

The invention relates to the technical field of power supply, in particular to an anti-icing power transmission line.

Background technique

The normal operation of modern society is inseparable from the normal supply of electricity. In winter, due to the low temperature, under weather conditions such as rain and snow, icing is prone to occur on transmission lines. Transmission lines, especially high-voltage transmission lines, have long power supply distances and large transmission capacity. Once a failure occurs, it will cause huge economic losses to downstream power consumers and individuals. For example, in 2005, a 500KV ultra-high voltage transmission line in Central China Power Grid suffered a tower collapse and disconnection accident, which caused economic losses of more than 10 million yuan to downstream power consumers. After investigation, the main cause of the accident was that the icing thickness of the transmission line exceeded the design allowable icing thickness. Of course, in addition to the extreme case of downed towers and broken lines, the hazards of icing on transmission lines may also be manifested in overload, uneven icing or de-icing at different times, galloping of ice-coated conductors, and ice flashing of insulators.

In modern industrial production, for many large electricity consumers such as electrolytic aluminum production enterprises, depending on the scale of production, a furnace shutdown accident will cause economic losses ranging from as little as one million to as many as 10 to 20 million. Therefore, the stable power supply of transmission lines is the basic requirement for the normal operation of modern society, and anti-icing of transmission lines has become a research topic with strong practical significance.

At present, international and domestic research directions are concentrated on deicing technology, which can be roughly divided into the following categories:

1. Natural external deicing. This is the simplest and most mature deicing technology at present. This technology mainly uses natural external forces such as strong winds and temperature changes in nature to remove icing on transmission lines; this is currently the simplest and most mature deicing technology.

2. Mechanical deicing. Mechanical deicing is the direct removal of ice through machinery, mainly including electromagnetic pulse deicing, sliding shovel deicing and manual deicing. These deicing methods are relatively mature, but the removal rate is low and greatly affected by the environment. Electromagnetic pulse deicing makes full use of the repulsive force generated by the magnetic field of the eddy current and the magnetic field of the coil to expand the wire, and the principle that the wire shrinks after the current pulse disappears, so that the icing on the surface of the wire expands and contracts repeatedly and then swells and falls off. Sliding shovel deicing is to convert the impulse discharge current of the capacitor through the pulse magnetic field generated by the coil into the pulse force of the actuator, and then crack and drop the ice on the surface of the wire.

3. Heating to melt ice. The heating ice melting method is to use the Joule heat generated when the transmission current greater than the normal current density passes through the transmission line to melt the ice coating on the wire, and the extreme case is short circuit ice melting. At present, AC current and DC current are mainly used to heat and melt ice, and the dielectric loss ice melting technology using high-frequency and high-voltage excitation is also used in a smaller range. In 2011, the research team led by Wang Yaonan of Hunan University, Hunan Electric Power Experimental Research Institute, National University of Defense Technology and other institutions jointly undertook and completed the scientific research results of "new ice melting and deicing technology and devices for transmission lines". played an important role in the field of ice melting. Their newly developed traveling DC ice melting device has successfully realized DC ice melting on several 220 kV transmission lines.

These existing research results are of great significance to the deicing of transmission lines, but these studies only focus on "deicing after icing", and there is no relevant research on how to prevent transmission line icing Research.

Contents of the invention

The object of the present invention is to provide an active anti-icing transmission line system which can prevent the transmission line from being covered with ice in winter by using an anti-icing solution.

In order to achieve the above object, the active anti-icing power transmission line system of the present invention includes the power transmission line connected between the line towers and the anti-icing cover tube covering the transmission line, and each line tower is equipped with There is an anti-icing liquid tank, which is filled with anti-icing liquid; the anti-icing liquid tank is higher than the transmission line, and the anti-icing liquid tank is a closed structure, and the top of the anti-icing liquid tank is connected with a vent pipe upwards, and the anti-icing liquid tank The upper part is connected with a liquid inlet pipe, and the bottom of the liquid inlet pipe is provided with a liquid inlet valve;

The anti-icing cover tube includes an upper cover tube and a lower cover tube. Both the upper cover tube and the lower cover tube are made of tempered glass and are suitable for the transmission line. The upper cover tube is set on the upper part of the transmission line, and the lower cover tube is It is located at the lower part of the transmission line and is fixedly connected upwards with the upper cover cylinder through the flange structure; the upper cover cylinder is provided with several anti-icing liquid grooves along the length direction of the transmission line, and each anti-icing liquid groove is along the circumferential direction of the upper cover cylinder Set at even intervals; the length of the upper cover tube and the lower cover tube are the same, both greater than or equal to 0.5 meters and less than or equal to 2 meters; the flange structure is made of tempered glass;

The anti-icing liquid pipe is connected to the bottom of the anti-icing liquid tank, and the other end of the anti-icing liquid pipe is connected with an anti-icing liquid tank at the top of the upper cover cylinder. with remote control;

The anti-icing fluid is sodium chloride aqueous solution, calcium chloride aqueous solution or magnesium chloride aqueous solution.

The top of the air discharge pipe is connected with a shielding cover with the opening facing downward.

The liquid inlet pipe extends downward along the line tower to the ground, and the lower end of the liquid inlet pipe is connected with a flange joint; along the length direction of the transmission line, every 1000 meters is installed in the topmost anti-icing liquid tank to cut off the anti-icing liquid. Ice tank plug.

It also includes a monitoring system, which includes an electronic control device, an upper liquid level sensor set on the upper part of the anti-icing liquid tank and a lower liquid level sensor set on the lower part of the anti-icing liquid tank; both the upper liquid level sensor and the lower liquid level sensor pass through The signal line is connected to the electronic control device, and the electronic control device is connected to a display, a wireless communication module and a battery. The volume of the anti-icing liquid tank under the lower liquid level sensor is greater than or equal to the volume of all anti-icing liquid tanks between two adjacent line towers Sum.

The wireless communication module is a 2G module or a 3G module or a 4G module.

A monitoring box is set every 300 to 2000 meters along the transmission line, and the electric control device, display and wireless communication module are all arranged in the monitoring box, and the monitoring box is provided with a box door.

The present invention has following advantage:

In winter, before the arrival of ice and snow weather, inject anti-icing liquid into an anti-icing liquid tank at the top of the cover tube through the anti-icing liquid tank. After the anti-icing liquid tank is filled, the anti-icing liquid will naturally Overflow to the anti-icing fluid tanks on both sides until all the anti-icing fluid tanks enter the anti-icing fluid, and finally the excess anti-icing fluid will be distributed on the flange structure and drip to the ground. When the snow falls to the transmission line, it is blocked by the upper cover tube. Through the overflow effect, the surface of the upper cover tube is evenly distributed with anti-icing liquid, and the ice and snow falling on the upper cover tube 7 directly contacts with the anti-icing liquid, so that it will not condense on the upper cover tube. The freezing point of the part of ice and snow in contact with the upper cover tube is lowered, and after melting, it flows down along the upper cover tube, passes through the flange structure (there is also anti-icing fluid on the flange structure) and falls to the ground. This flow process also ensures that the surface of the upper shroud and the flange structure is continuously provided with anti-icing fluid. During the downward flow of the melted part of the ice and snow, it will also flow down with the unmelted part of the ice and snow and slide down to the ground, thereby preventing the accumulation and thickening of ice and snow on the transmission line.

The active anti-icing power transmission line system of the present invention is simple in structure and easy to install and use. Before the rainy and snowy weather, the present invention can be activated according to the weather forecast, effectively realizing the active anti-icing of the power transmission line, and avoiding the damage caused by excessive icing of the power transmission line. hazards.

The working consumables of the present invention are chlorine salt solutions, which are low in cost, easy to replenish and convenient for long-term use. The air release pipe can ensure that the anti-icing liquid tank can normally enter and discharge liquid, and the shielding cover can prevent rain, snow or sand and other sundries from entering the anti-icing liquid tank through the air release pipe. The flange joint is very convenient to connect the liquid inlet pipe with the flange joint on the infusion pipe of the vehicle-mounted high-pressure pump, which is convenient for liquid inlet.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a schematic diagram of the system in use state of the present invention;

Figure 3 is an enlarged view of the vent pipe in Figure 2;

Fig. 4 is the schematic diagram of monitoring system;

Fig. 5 is a schematic cross-sectional view of the power transmission line and the anti-icing cover cylinder.

Detailed ways

As shown in Fig. 1 and Fig. 5, the active type anti-icing power transmission line system of the present invention comprises the power transmission line 9 that is connected between the line towers 16 and the anti-icing cover tube that is located on the power transmission line 9, each line tower 16 An anti-icing liquid tank 1 is provided, and the anti-icing liquid tank 1 is filled with anti-icing liquid; the anti-icing liquid tank 1 is higher than the power transmission line 9, and the anti-icing liquid tank 1 is a closed structure, and the top of the anti-icing liquid tank 1 is connected upwards with The air release pipe 2, the upper part of the anti-icing liquid tank 1 is connected with the liquid inlet pipe 3, and the bottom of the liquid inlet pipe 3 is provided with the liquid inlet valve 4;

The anti-icing cover tube includes an upper cover tube 7 and a lower cover tube 8, both of which are made of toughened glass and are compatible with the transmission line 9, and the upper cover tube 7 is set on the transmission line 9 The upper part, the lower cover tube 8 is set on the lower part of the transmission line 9 and is fixedly connected upward with the upper cover tube 7 through the flange structure 10; the upper cover tube 7 is provided with several anti-icing liquid tanks 11 along the length direction of the transmission line 9 , each anti-icing fluid tank 11 is evenly spaced along the circumferential direction of the upper cover tube 7; the upper cover tube 7 and the lower cover tube 8 have the same length, both greater than or equal to 0.5 meters and less than or equal to 2 meters (preferably 1 meter); method The blue structure 10 is made of tempered glass;

The bottom of the anti-icing liquid tank 1 is connected with an anti-icing liquid pipe 12, and the other end of the anti-icing liquid pipe 12 is connected with an anti-icing liquid tank 11 at the top of the upper cover cylinder 7, and the anti-icing liquid pipe 12 is provided with a remote control solenoid valve 13. The remote control solenoid valve 13 is equipped with a remote control (the remote control is not shown in the figure); the anti-icing fluid is sodium chloride aqueous solution, calcium chloride aqueous solution or magnesium chloride aqueous solution.

The top of the deflation pipe 2 is connected with a shield cover 14 with the opening facing downward. The deflation pipe 2 can ensure that the anti-icing liquid tank 1 can normally enter and discharge liquid, and the shield cover 14 can prevent sundries such as rain, snow or dust from entering the anti-icing liquid tank 1 through the deflation pipe 2 .

The liquid inlet pipe 3 extends downwards along the line tower 16 to the ground, and the lower end of the liquid inlet pipe 3 is connected with a flange joint 15; The flange joints 15 are butt-connected, which is convenient for liquid inlet. Along the length direction of the power transmission line 9, a plug for blocking the anti-icing liquid tank 11 is provided in the topmost anti-icing liquid tank 11 every 1000 meters. The plug is a conventional technology, not shown in the figure.

The active anti-icing power transmission line system of the present invention also includes a monitoring system. The monitoring system includes an electric control device 17, an upper liquid level sensor 5 arranged on the upper part of the anti-icing liquid tank 1 and a lower liquid level sensor arranged on the lower part of the anti-icing liquid tank 1. level sensor 6; the upper liquid level sensor 5 and the lower liquid level sensor 6 are all connected to the electric control device 17 through the signal line, and the electric control device 17 is connected with a display 18, a wireless communication module 19 and a storage battery 20; The volume of the ice liquid tank 1 is greater than or equal to the sum of the volumes of all the anti-icing liquid tanks 11 between two adjacent line towers 16 . This can ensure that as long as the liquid level is higher than the lower liquid level sensor 6, the solution in the anti-icing liquid tank 1 can fill the anti-icing liquid tank 11 once, so as to ensure the consumption of completing one anti-icing task.

The wireless communication module 19 is a 2G module or a 3G module or a 4G module.

A monitoring box 21 is set every 300 to 2000 meters (including the end value) along the transmission line 9, and the electric control device 17, display 18 and wireless communication module 19 are all arranged in the monitoring box 21, and the monitoring box 21 is provided with a box door . In this way, each monitoring box 21 monitors a section of power transmission line, which is convenient for use.

The present invention also discloses a method for using the above-mentioned active anti-icing power transmission line system, which is carried out according to the following steps:

The first step is a preparatory step. When ice and snow weather will occur within 24 hours of the weather forecast, the staff will use the transport vehicle to transport the high-pressure pump 22 and the liquid tank 24 filled with anti-icing fluid to the active anti-icing transmission line. The liquid inlet of 22 is connected with liquid tank 24, and the liquid outlet of high-pressure pump 22 is connected with infusion tube 23;

The second step is that the staff controls the transport vehicle to advance from the starting end of the transmission line 9 to the end along the length direction of the transmission line 9; when advancing to a monitoring box 21, the door of the monitoring box 21 is opened, and the display 18 is opened to check before and after Whether the liquid level in the anti-icing liquid tank 1 within the range of 500 meters is lower than the lower liquid level sensor 6, and then close the display 18 and the box door;

During the travel of the transport vehicle, every time a line tower 16 passes by, if the liquid level in the anti-icing liquid tank 1 on the line tower 16 is higher than the lower liquid level sensor 6 or is flush with the lower liquid level sensor 6, then directly use the The remote controller opens the remote control solenoid valve 13 to make the anti-icing liquid tank 1 inject anti-icing liquid into the anti-icing liquid tank 11 until the anti-icing cover cylinder at a distance of 480 meters from the anti-icing liquid tank drips the anti-icing liquid downwards. Close remote control electromagnetic valve 13 by remote controller; Now all basically fill with anti-icing liquid in the anti-icing liquid tank 11 within the range of 500 meters before and after this anti-icing liquid tank 1.

If the liquid level in the anti-icing liquid tank 1 on the line tower 16 is higher than the lower liquid level sensor 6, then connect the liquid inlet pipe 3 and the infusion pipe 23 at this place by the flange joint 15, open the liquid inlet valve 4, start The high-pressure pump 22 injects anti-icing liquid into the anti-icing liquid tank 1 until the liquid level in the anti-icing liquid tank 1 is higher than the upper liquid level sensor 5 or when it is flush with the upper liquid level sensor 5, the high-pressure pump 22 is closed and Liquid valve 4, separate the flange joint 15 at this place, separate the infusion pipe 23 from the liquid inlet pipe 3; Anti-icing fluid, until the anti-icing cover cylinder at 480 meters away from the anti-icing fluid tank drips anti-icing fluid downwards, and close the remote control solenoid valve 13 by remote control;

Repeat the second step until all the anti-icing liquid tanks 11 are filled with anti-icing liquid along the length direction of the transmission line 9 .

The wireless communication module 19 is a 2G module or a 3G module or a 4G module, and each anti-icing fluid tank 1 corresponds to a serial number, and the serial numbers of each anti-icing fluid tank 1 are different.

In the three seasons of spring, summer and autumn, the monitoring system is turned off; when winter comes, the monitoring system is turned on, which can avoid invalid monitoring and save corresponding energy;

When the electric control device 17 detects that the liquid level in the anti-icing liquid tank 1 of a certain number is lower than the lower liquid level sensor 6, the electric control device 17 sends a reminder note to the designated mobile phone number by the wireless communication module 19, reminding the number The anti-icing liquid tank 1 needs to be replenished with anti-icing liquid; during the process of replenishing the anti-icing liquid, when the liquid level in the anti-icing liquid tank 1 reaches the upper liquid level sensor 5, the electronic control device 17 receives the signal from the upper liquid level sensor 5 liquid level signal, and send a reminder text message to the designated mobile phone number by the wireless communication module 19, reminding that the anti-icing liquid tank 1 of this number has been full of anti-icing liquid.

In winter, the staff conducts the operation of replenishing anti-icing fluid in the second step once a week for all anti-icing fluid tanks 1 that need to be supplemented with anti-icing fluid according to the reminder message.

The above embodiments are only used to illustrate and not limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced without departing from it. Any modifications or partial replacements within the spirit and scope of the present invention shall fall within the scope of the claims of the present invention.

Claims (4)

1. Active anti-icing transmission line system, characterized in that: it includes the transmission line connected between the line towers and the anti-icing cover tube covering the transmission line, each line tower is equipped with an anti-icing liquid tank, anti-icing The liquid tank is filled with anti-icing fluid; the anti-icing liquid tank is higher than the power transmission line, and the anti-icing liquid tank is a closed structure. There is a liquid inlet valve at the bottom of the liquid pipe; The anti-icing cover tube includes an upper cover tube and a lower cover tube. Both the upper cover tube and the lower cover tube are made of tempered glass and are suitable for the transmission line. The upper cover tube is set on the upper part of the transmission line, and the lower cover tube is It is located at the lower part of the transmission line and is fixedly connected upwards with the upper cover cylinder through the flange structure; the upper cover cylinder is provided with several anti-icing liquid grooves along the length direction of the transmission line, and each anti-icing liquid groove is along the circumferential direction of the upper cover cylinder Set at even intervals; the length of the upper cover tube and the lower cover tube are the same, both greater than or equal to 0.5 meters and less than or equal to 2 meters; the flange structure is made of tempered glass; The anti-icing liquid pipe is connected to the bottom of the anti-icing liquid tank, and the other end of the anti-icing liquid pipe is connected with an anti-icing liquid tank at the top of the upper cover cylinder. with remote control; The anti-icing liquid is sodium chloride aqueous solution or calcium chloride aqueous solution or magnesium chloride aqueous solution; The top of the air release pipe is connected with a shielding cover with the opening facing downward; The liquid inlet pipe extends downward along the line tower to the ground, and the lower end of the liquid inlet pipe is connected with a flange joint; along the length direction of the transmission line, every 1000 meters is installed in the topmost anti-icing liquid tank to cut off the anti-icing liquid. Ice tank plug. 2. The active anti-icing transmission line system according to claim 1, characterized in that: it also includes a monitoring system, the monitoring system includes an electric control device, an upper liquid level sensor arranged on the top of the anti-icing liquid tank and an anti-icing The lower liquid level sensor is installed at the lower part of the liquid tank; both the upper liquid level sensor and the lower liquid level sensor are connected to the electronic control device through the signal line, and the electronic control device is connected with a display, a wireless communication module and a battery, and the anti-icing fluid below the lower liquid level sensor The volume of the box is greater than or equal to the sum of the volumes of all anti-icing liquid tanks between two adjacent line towers. 3. The active anti-icing transmission line system according to claim 2, wherein the wireless communication module is a 2G module, a 3G module or a 4G module. 4. The active anti-icing transmission line system according to claim 3, characterized in that: a monitoring box is set every 300 to 2000 meters along the transmission line, and the electronic control device, display and wireless communication module are all set in the monitoring box. Inside the box, the monitoring box is provided with a box door.

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