CN112952717A - Deicing ring, deicing device, deicing method and system - Google Patents
Deicing ring, deicing device, deicing method and system Download PDFInfo
- Publication number
- CN112952717A CN112952717A CN202110406582.3A CN202110406582A CN112952717A CN 112952717 A CN112952717 A CN 112952717A CN 202110406582 A CN202110406582 A CN 202110406582A CN 112952717 A CN112952717 A CN 112952717A
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- deicing
- ring
- ring body
- power transmission
- ice
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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
Abstract
The invention discloses a deicing ring, comprising: a ring body constructed of a ferromagnetic material; and a heating coating layer coated outside the ring body. The existing deicing technologies cannot realize the uninterrupted deicing of the power transmission line, and cannot cope with the icing disasters of the power transmission line in small-range repeated icing areas such as micro-terrain, microclimate and the like. The deicing ring is a low-cost and effective non-power-outage anti-icing and deicing measure for the wire. Can be popularized and used in small-range repeated ice-covering areas such as microtopography, microclimate and the like.
Description
Technical Field
The invention relates to the technical field of online deicing of power transmission lines, in particular to a deicing ring, a deicing device, a deicing method and a deicing system.
Background
China is one of the most frequent countries of transmission line icing accidents, and the transmission line icing accidents are difficult to predict for a long time to cause great economic loss to the countries. Once icing occurs, mechanical and electrical accidents such as strand breakage, wire breakage and galloping of a lead and damage of tower hardware fittings can occur to the power transmission line, and large-range and long-time power supply interruption is caused when the mechanical and electrical accidents are serious.
In the long-term research process, starting from different influence factors of icing and snow accumulation of the power transmission line, a plurality of anti-icing and de-icing methods are proposed, such as mechanical de-icing, anti-icing coating, thermodynamic de-icing, electric pulse de-icing and the like. Various methods have certain effects under different environments and use conditions, but all have limitations, and none of the methods can completely solve the problem of conductor icing. At present, a direct-current deicing method is widely adopted in China as an efficient active deicing mode. However, the direct-current ice melting method needs a power failure of a line, the equipment cost is high, and certain time is needed for the access operation and the effect of the direct-current ice melting device. Therefore, the direct-current ice melting is useless for the attack of the extremely fast and large-area ice and snow cold current.
The ice coating disaster of the transmission line in China is analyzed, and the ice coating disaster has the characteristics of typical microtopography and microclimate besides the ice disaster accident in a large range caused by the attack of ice and snow weather in a large range. The micro-terrain and micro-meteorological icing refers to that micro-meteorological factors in the area are subjected to variation in a certain small range due to the existence of the micro-terrain, so that serious icing disasters of the power transmission line are caused. Common microtopography includes mountains and watershed, terrain uplift, canyons, beaks and the like, and the range of the microtopography can be as small as hundreds of meters of space and several or even one span. The ice coating phenomenon of micro-terrain and micro-meteorological areas is serious, the duration is long, the harm is large, the prevention and the control are difficult, and the direct current ice melting equipment in a large range is not controlled.
Therefore, the power grid needs an uninterruptible anti-icing and deicing means for coping with icing disasters in micro-terrain and micro-meteorological areas.
Disclosure of Invention
The invention aims to provide an ice removing ring, an ice removing device, an ice removing method and an ice removing system, which aim to solve at least one defect in the prior art.
The purpose of the invention is realized by the following technical scheme:
the invention provides a deicing ring, comprising:
a ring body constructed of a ferromagnetic material;
and a heating coating layer coated outside the ring body.
Optionally, the heat generating coating has a conductive function.
Optionally, the ring body comprises:
a first ring body;
the second ring body is buckled with the first ring body to form an annular structure, and the annular structure is provided with a space for a power transmission wire to pass through.
Optionally, the ring body further includes a connector, and the first ring body and the second ring body are fixedly connected through the connector.
The invention provides a deicing device, comprising:
and the deicing rings are arranged on the power transmission conductor at intervals.
The deicing method is characterized in that a plurality of deicing rings are arranged on a power transmission conductor at intervals, and alternating current is applied to the power transmission conductor.
The invention provides a deicing system, comprising:
the ice melting module is used for generating a plurality of ice removing rings of heat in the alternating magnetic field; the deicing rings are arranged on the power transmission wire at intervals;
and the alternating current applying module is used for applying alternating current to the power transmission conductor.
Optionally, the deicing ring is the deicing ring described above.
Due to the adoption of the technical scheme, the invention has the following advantages:
the invention provides a method for conducting wire automatic uninterrupted deicing by adopting an eddy self-heating ring made of a low-cost composite ferromagnetic material by combining magnetocaloric calculation and deicing process heat balance analysis. The method is very suitable for preventing and treating ice disasters in small-range areas with serious local ice coating, such as micro-landform and microclimate ice coating areas. When the transmission line path is in a micro-terrain or microclimate ice-covered area with the length of several km or even several hundred meters, ice disasters such as tower falling, wire breaking and the like are difficult to stop, and a large-scale ice melting means is difficult to develop in real time, so that the method is very suitable for arranging the eddy current self-heating ring in the area to inhibit the formation of conductor ice covering and reduce the risk of ice disasters.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
The drawings of the present invention are described below.
Fig. 1 is a structural diagram of an ice removing ring according to an embodiment of the present invention, where a is a structural diagram of an ice removing ring at one viewing angle, and b is a structural diagram of an ice removing ring at another viewing angle;
FIG. 2 is a block diagram of a deicing ring in accordance with another embodiment of the present invention;
fig. 3 is a structural diagram of a deicing device according to an embodiment of the present invention.
Detailed Description
The invention is further illustrated by the following figures and examples.
As shown in fig. 1, an embodiment of the present application provides a deicing ring, including:
a ring body constructed of a ferromagnetic material;
and a heating coating layer coated outside the ring body. Wherein the heat generating coating layer has a conductive function.
In one embodiment, as shown in fig. 2, the ring body comprises:
a first ring body 11;
the second ring body 12 is fastened with the first ring body to form an annular structure, and the annular structure is provided with a space for a power transmission wire to pass through.
In an embodiment, the ring body further includes a connecting member, and the first ring body and the second ring body are fixedly connected by the connecting member.
When the deicing ring is used, the deicing ring is sleeved on the power transmission lead. When alternating current is applied, an alternating magnetic field exists outside the power transmission conductor, and ferromagnetic materials (namely, the deicing rings) positioned nearby generate strong alternating magnetic induction intensity in the alternating magnetic field, so that hysteresis loss and eddy current loss are caused. Meanwhile, the heating coating (conductive coating) with low resistivity coated outside the ferromagnetic material generates eddy current loss in the alternating magnetic induction induced by the ferromagnetic material, and the generated heat energy is further increased. When the magnetocaloric temperature of the ferromagnetic material reaches a certain value, ice coating on the transmission line can be relieved, delayed or melted. The magnetic field strength H and the magnetic induction B in ferromagnetic materials can be expressed as:
H＝Hmcos(ω1t) (1)
B＝Bmcos(ω1t-δ) (2)
in the formula, HmIs the peak value of the magnetic field intensity, BmIs the peak of magnetic induction, omega1The power frequency angular frequency is shown, and the delta is the phase difference.
Magnetocaloric P of deicing RingmHysteresis loss P from a core (ferromagnetic material)eCore eddy current loss PhAnd eddy current loss P of deicing ring heating coatingrNamely:
Pm＝Pe+Ph+Pr (3)
hysteresis loss power P of magnetic coreeComprises the following steps:
wherein f is the operating frequency, eta is the Stationenmetz coefficient, mumIs the permeability of the core, V1Is the core volume.
Eddy current power loss P of magnetic corehIs composed of
In the formula, ρmIs the resistivity of the core material.
Eddy current power loss P of heat-generating coatingrIs composed of
In the formula, ρcIs the resistivity of the heat-generating cladding material, V2Is the heat generating cladding volume.
In order to obtain larger heating value and considering the cost of materials, the magnetic core of the deicing ring (eddy current self-heating ring) is made of cast iron which is low in price and easy to machine, and is machined into a single openable iron ring according to the diameter size of the power transmission conductor so as to be convenient to install. The outside of the iron core is plated with a layer of copper as a heating coating.
The external dimension of the eddy self-heating ring is shown in figure 1:
in fig. 1: r1 is the inner diameter, R2 is the outer diameter, L is the deicing ring width, and D is the deicing ring thickness.
In one embodiment, the structural parameters of an eddy current self-heating ring are shown in table 1. The outside of the iron core is plated with a layer of copper with the thickness of 1.5mm as a heating coating.
TABLE 1
The calculation of the formulas (1) to (6) shows that the heating power of the single eddy current self-heating ring is rapidly increased along with the increase of the transmission current. When the transmission current exceeds 140A, namely the transmission current density is 0.35A/mm2When the eddy self-heating ring is used, the heat productivity of the eddy self-heating ring reaches a stable value, and is about 2.0 w. The width of the ring body is 20mm, and the standard unit is 100W/m, so that the wire surface anti-icing under specific conditions can be realized at the arrangement position of the eddy current self-heating ring.
The example of this application provides a defroster, includes:
a plurality of deicing rings arranged at intervals on the power transmission conductor, the deicing rings being as shown in fig. 1 and 2.
The actual deicing effect of the deicing device is shown in fig. 3, and the specific test conditions are as follows: wind speed: 6 m/s; temperature: -5 ℃; liquid water content in air: 0.6g/m3(ii) a Average diameter of liquid droplets in air: 25 μm; conductor current 400A. It can be seen from the figure that no ice coating is formed on the arrangement position of the vortex self-heating ring under the test condition, which shows that the heat generated by the vortex self-heating ring under the test condition can effectively inhibit the ice coating formation on the ring body. In addition, due to the existence of the eddy self-heating ring, segmented ice coating is formed on the lead, the mutual adhesive force is reduced, and the self falling of an ice layer in the natural or thermal ice melting process is facilitated.
The embodiment of the application provides a deicing method, a plurality of deicing rings are arranged on a power transmission conductor at intervals, the deicing rings are shown in figures 1 and 2, and alternating current is applied to the power transmission conductor.
The present example provides a deicing system, includes:
the deicing module is used for generating a plurality of deicing rings of heat in the alternating magnetic field, and the deicing rings are shown in figures 1 and 2; the deicing rings are arranged on the power transmission wire at intervals;
and the alternating current applying module is used for applying alternating current to the power transmission conductor.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered in the protection scope of the present invention.
Claims (8)
1. A deicer ring, comprising:
a ring body constructed of a ferromagnetic material;
and a heating coating layer coated outside the ring body.
2. Deicing ring according to claim 1, characterized in that the heat-generating coating has an electrically conductive, heat-generating function.
3. The deicing ring of claim 1, wherein the ring body comprises:
a first ring body;
the second ring body is buckled with the first ring body to form an annular structure, and the annular structure is provided with a space for a power transmission wire to pass through.
4. The deicer ring of claim 2, wherein the ring body further comprises a connector by which the first ring body and the second ring body are fixedly connected.
5. A deicing device characterized by comprising:
a plurality of deicing rings according to any one of claims 1 to 4 arranged at intervals on a power transmission conductor.
6. A method of deicing characterized by arranging a number of deicing rings according to any one of claims 1-4 at intervals on a power conductor and applying an alternating current to said power conductor.
7. A deicing system characterized by comprising:
the ice melting module is used for generating a plurality of ice removing rings of heat in the alternating magnetic field; the deicing rings are arranged on the power transmission wire at intervals;
and the alternating current applying module is used for applying alternating current to the power transmission conductor.
8. Deicing system according to claim 7, characterized in that said deicing ring is a deicing ring according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110406582.3A CN112952717A (en) | 2021-04-15 | 2021-04-15 | Deicing ring, deicing device, deicing method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110406582.3A CN112952717A (en) | 2021-04-15 | 2021-04-15 | Deicing ring, deicing device, deicing method and system |
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| CN112952717A true CN112952717A (en) | 2021-06-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101286629A (en) * | 2008-02-13 | 2008-10-15 | 郑卫东 | A device for covering surface of melting wires, poles and insulators in transmission line with ice |
| CN101299528A (en) * | 2008-03-12 | 2008-11-05 | 华旭东 | Method for deicing ground wire of high tension overhead transmission line |
| CN103151749A (en) * | 2013-04-01 | 2013-06-12 | 任雪松 | Electromagnetic induction de-icing method and device |
| CN214379992U (en) * | 2021-04-07 | 2021-10-08 | 张运强 | Defroster for high-voltage transmission line |
-
2021
- 2021-04-15 CN CN202110406582.3A patent/CN112952717A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101286629A (en) * | 2008-02-13 | 2008-10-15 | 郑卫东 | A device for covering surface of melting wires, poles and insulators in transmission line with ice |
| CN101299528A (en) * | 2008-03-12 | 2008-11-05 | 华旭东 | Method for deicing ground wire of high tension overhead transmission line |
| CN103151749A (en) * | 2013-04-01 | 2013-06-12 | 任雪松 | Electromagnetic induction de-icing method and device |
| CN214379992U (en) * | 2021-04-07 | 2021-10-08 | 张运强 | Defroster for high-voltage transmission line |
Non-Patent Citations (2)
| Title |
|---|
| 蒋兴良等: "低居里点铁磁材料在输电线路防冰中应用前景分析", 《南方电网技术》 * |
| 蒋兴良等: "输电线路除冰新技术――低居里(LC)磁热线在线路除冰中的应用", 《高电压技术》 * |
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Application publication date: 20210611 |