CN115458257A - Device, protective equipment and method for ground wire section insulation - Google Patents
Device, protective equipment and method for ground wire section insulation Download PDFInfo
- Publication number
- CN115458257A CN115458257A CN202211254812.XA CN202211254812A CN115458257A CN 115458257 A CN115458257 A CN 115458257A CN 202211254812 A CN202211254812 A CN 202211254812A CN 115458257 A CN115458257 A CN 115458257A
- Authority
- CN
- China
- Prior art keywords
- ground wire
- lightning
- ground
- ice
- insulator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
- H01B17/46—Means for providing an external arc-discharge path
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
- H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
- H01C7/12—Overvoltage protection resistors
- H01C7/123—Arrangements for improving potential distribution
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
The embodiment of the application provides a device, a protection device and a method for insulating a ground wire section, which comprise the following steps: the ground wire bracket is used for suspending a ground wire; the first lightning protection anti-icing flashover insulator comprises a first branch, a second branch and a third branch which are fixedly connected; the second lightning-protection anti-icing-flashover insulator comprises a first lightning arrester and is used for lightening damage caused by lightning stroke on the sectional ground wire. According to the technical scheme, the ice-covered ground line segment is separated from the whole ground line through the first lightning protection anti-ice-flash insulator and the second lightning protection anti-ice-flash insulator, the sectional insulation of the ground line is realized, the direct discharge of the ground line to a pole tower caused by lightning overvoltage can be prevented from causing the insulation damage of the surface of the insulator, the loop impedance of a lightning discharge channel and the energy of a lightning wave consumed by a zinc oxide resistor sheet in the lightning discharge channel are increased through the lightning protection anti-ice-flash insulator, the amplitude of the lightning current is reduced, the damage of the lightning current to the ground line is effectively reduced, and the ice melting safety of the ground line is also improved.
Description
Technical Field
The application relates to the technical field of electrical engineering, in particular to a device, a protection device and a method for ground wire sectional insulation.
Background
The improvement of insulating ground wire at present is the mode that hangs the ground wire with the insulator, but this kind of ground wire after insulating transformation can produce very high thunder and lightning overvoltage when suffering the thunderbolt, and this voltage can cause the insulator outer insulation of hanging the ground wire to take place the flashover along ground wire transmission, and then makes the outer insulation of insulator impaired and insulating properties descend by a wide margin, even can't bear the effect of induced voltage on the ground wire. Particularly, when ice is coated in winter, the ice coating tolerance voltage of the damaged insulator is low, and the ice melting voltage can cause the surface of the insulator to flashover when the ground wire is subjected to ice melting, so that the ice melting fails; when the circuit normally operates, the conducting wire generates extremely high static induction voltage to the ground wire, the insulator can not be subjected to flashover only when the ground wire is grounded, the static induction voltage is easy to cause ice melting failure when the ground wire is subjected to ice melting, even an ice melting device is damaged, and safety of ice melting personnel and equipment is damaged.
Disclosure of Invention
The application aims to provide a device, a protection device and a method for sectionalized insulation of a ground wire, which are used for solving the problem that ice melting cannot be carried out on the ground wire when the ground wire is seriously covered with ice in the running process of a line.
In order to achieve the above object, a first aspect of the present application provides an apparatus for insulation of a ground segment, comprising:
the ground wire bracket is used for suspending a ground wire;
the first lightning protection anti-icing flashover insulator comprises a first branch, a second branch and a third branch which are fixedly connected, wherein the first branch is connected with the grounding wire support, and the second branch and the third branch are respectively connected with different sectional grounding wires;
the second lightning protection anti-icing flashover insulator comprises a first lightning arrester;
the first end of the first lightning arrester is connected with the ground wire bracket, and the second end of the first lightning arrester is connected with the sectional ground wire, so that damage caused by lightning striking the sectional ground wire is reduced.
Optionally, the second lightning protection and anti-icing flashover insulator further includes a supporting mechanism, the supporting mechanism is embedded in the first lightning arrester, is connected to the ground wire bracket, and is configured to support the segment ground wire so that the segment ground wire is far away from the ground surface prone to icing.
Optionally, the first arrester comprises:
the zinc oxide resistance sheet is tightly sleeved in the external insulating cylinder of the first lightning arrester and used for eliminating static induction voltage generated by direct current to the ground wire and eliminating high-frequency transient overvoltage induced on the ground wire when the running state of the circuit changes.
Optionally, the first arrester further comprises:
the device comprises a glass fiber core rod, a ball socket hardware fitting, a ball head hardware fitting and an outer umbrella skirt;
the glass fiber core rod is sleeved with a zinc oxide resistance card, two ends of the glass fiber core rod are respectively connected with a ball socket fitting and a ball head fitting, an external umbrella skirt covers an external insulating cylinder, the external umbrella skirt is of a large umbrella structure and a small umbrella structure, the large umbrella skirt and the small umbrella structure are formed by arranging a plurality of two large umbrellas with equal diameters and a small umbrella between every two adjacent large umbrellas, and the large umbrella skirt and the small umbrella structure are used for bearing direct-current ice melting voltage.
Optionally, the first lightning protection and anti-icing flashover insulator comprises a first composite insulator, a second composite insulator and a second lightning arrester which are connected with each other and are in an inverted Y shape; the second arrester forms a first branch, the first composite insulator forms a second branch, and the second composite insulator forms a third branch;
the first composite insulator is provided with a discharge gap, the first end of the first composite insulator is connected with the first subsection ground wire, and the second end of the first composite insulator is connected with the first end of the second composite insulator;
the second composite insulator is provided with a discharge gap, the second end of the second composite insulator is connected with the second segment ground wire, and the first composite insulator and the second composite insulator are used for gap discharge and lead current into the ground;
and the first end of the second lightning arrester is connected with the ground wire bracket, and the second end of the second lightning arrester is respectively connected with the first composite insulator and the second composite insulator and used for suspending the first segment ground wire and the second segment ground wire so as to bear the tensile load of each segment ground wire.
Optionally, the second arrester comprises:
the zinc oxide resistor disc is sleeved on the glass fiber core rod, two ends of the glass fiber core rod are respectively connected with the ball socket hardware fitting and the ball head hardware fitting, the insulating cylinder is tightly sleeved on the zinc oxide resistor disc, and the outer part of the insulating cylinder is covered with the silicon rubber umbrella skirt with a large umbrella structure and a small umbrella structure.
Optionally, the number of the ground wire supports is at least 3, and the ground wire supports include a first ground wire support, a second ground wire support, and a remaining ground wire support located between the first ground wire support and the second ground wire support, the first ground wire support and the second ground wire support suspend the ground wire through the first lightning protection anti-ice-flashover insulator, and the remaining ground wire support suspends the ground wire through the second lightning protection anti-ice-flashover insulator.
A second aspect of the present application provides a foundation tower comprising:
the tower pole and the device for insulating the ground wire section, the ground wire bracket is arranged on the tower pole.
A third aspect of the present application provides a protection device for a ground wire, comprising:
the above-mentioned base tower;
the two ends of the ice melting device are respectively connected with the first lightning protection and ice flash prevention insulators corresponding to the two ground wires and used for increasing the current of the ground wires;
and the conducting wire is used for connecting the head ends of the two ground wires and/or the tail ends of the two ground wires.
A fourth aspect of the present application provides a method for insulating a ground wire section, which is applied to the above-mentioned protection device for a ground wire, and includes:
the ground wire segmentation is to separate the ground wire which is easy to be coated with ice from the complete ground wire circuit;
eliminating the induced voltage on the ground wire easy to be coated with ice;
forming a power-on loop for the ground wire easy to be coated with ice;
and melting ice on the ground wire which is easy to cover ice.
According to the technical scheme, the first lightning protection anti-icing flashover insulator is connected with the ground wire support and the segmented ground wire, so that the ground wire in the area easy to cover ice can be segmented; the first lightning arrester in the second lightning-protection anti-icing flashover insulator can reduce damage caused by lightning stroke when the sectional ground wire is struck, the first end of the first lightning arrester is connected with the ground wire support, and the second end of the first lightning arrester is connected with the sectional ground wire. By the technical scheme, the insulator surface insulation damage caused by direct discharge of the ground wire to the pole tower due to lightning overvoltage can be prevented, so that ice melting failure of the icing ground wire is effectively prevented, the lightning protection ice flashover prevention insulator increases loop impedance of a lightning discharge channel and energy of lightning waves consumed by a zinc oxide resistor disc inside the lightning discharge channel, the amplitude of the lightning current is reduced, damage of the lightning current to the ground wire is effectively reduced, and the safety of ground wire ice melting is also improved.
Additional features and advantages of embodiments of the present application will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the embodiments of the disclosure, but are not intended to limit the embodiments of the disclosure. In the drawings:
fig. 1 schematically shows a structural schematic of an arrangement for insulation of a ground segment according to an embodiment of the application;
fig. 2 schematically illustrates a structural schematic view of a first lightning protection anti-icing flash insulator according to an embodiment of the present application;
fig. 3 schematically shows a cross-sectional view of a second arrester according to an embodiment of the application;
FIG. 4 is a block diagram schematically illustrating a base tower according to an embodiment of the present disclosure;
fig. 5 schematically shows a block diagram of a protection device for earth wires according to an embodiment of the application;
fig. 6 schematically shows an application environment diagram of a protection device for earth wires according to an embodiment of the application;
fig. 7 schematically shows a flow diagram illustration of a method for ground segment insulation according to an embodiment of the application.
Reference numerals
101 ground wire support 102 first lightning protection anti-icing flashover insulator
103 second lightning protection anti-icing flashover insulator 202 first composite insulator
203 second composite insulator 204 second lightning conductor
301 zinc oxide resistance card 302 glass fiber core rod
303 ball socket hardware 304 ball head hardware
305 silicon rubber umbrella skirt 306 insulating cylinder
400-base tower 401 tower pole
402 device for ground segment insulation 500 protection equipment for ground
502 Ice melting device
Detailed Description
The following detailed description of embodiments of the present application will be made with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the application, are given by way of illustration and explanation only, not limitation.
It should be noted that if directional indications (such as upper, lower, left, right, front and rear \8230;) are referred to in the embodiments of the present application, the directional indications are only used for explaining the relative positions, relationships, motion situations and the like of the components in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
Fig. 1 schematically shows a structural diagram of an insulation device for a ground segment according to an embodiment of the present application. As shown in fig. 1, the device for ground segment insulation comprises a ground bracket 101 for suspending a ground wire; and the first lightning protection anti-icing flashover insulator 102 is connected with the ground wire bracket 101 and is used for segmenting the ground wire of the ice-prone area. The first lightning protection and anti-icing flashover insulator 102 includes a first branch, a second branch and a third branch which are fixedly connected. A first branch of the first lightning protection and anti-icing flashover insulator 102 is connected to the ground wire bracket 101, and a second branch and a third branch of the first lightning protection and anti-icing flashover insulator 102 are respectively connected to different segment ground wires. The two ends of the ground wire support 101 are respectively connected with the two first lightning-protection anti-icing flashover insulators 102 to form a ground wire sectional insulation device, and the ground wire in an area easy to cover ice can be separated from the whole ground wire circuit by using the device, so that on one hand, the sectional insulation of the ground wire can be realized, on the other hand, the ice melting operation can be performed on the ice-covered ground wire under the condition of no power outage, and the external insulation of the insulators is not damaged. A second lightning protection anti-icing flashover insulator 103, wherein the second lightning protection anti-icing flashover insulator 103 comprises a first lightning arrester. One end of the second lightning protection anti-icing-flashover insulator 103 is suspended at the middle section of the segment ground wire, the other end of the second lightning protection anti-icing-flashover insulator 103 is connected with the ground wire support at the middle section of the segment ground wire, and the second lightning protection anti-icing-flashover insulator 103 can be used for eliminating induced voltage on the segment ground wire.
In one embodiment, the first lightning protection and anti-icing flashover insulator 102 is equivalent to a sectionalized ground wire lightning protection and anti-icing flashover insulator, and may be formed by two composite insulators with discharge gaps and a lightning arrester to form an inverted Y-shaped structure. The composite insulator with the discharge gap can be a short composite insulator with a fixed discharge gap, and the two short composite insulators with the fixed discharge gap can be connected into a splayed structure. An arrester may be a rod-through structure arrester.
In one embodiment, the apparatus for insulating the ground segment may further include a second lightning protection and anti-ice-flash insulator 103, the second lightning protection and anti-ice-flash insulator 103 including a first lightning arrester and a supporting mechanism, wherein a first end of the first lightning arrester is connected to the ground bracket and a second end of the first lightning arrester is connected to the segment ground, so as to reduce damage caused by lightning striking the segment ground; and the supporting mechanism is embedded in the first lightning arrester, is connected with the ground wire bracket and is used for supporting the sectional ground wire so as to enable the sectional ground wire to be far away from the ground which is easy to cover ice.
When the ground wire is struck by lightning, the second lightning-protection anti-icing flashover insulator 103 has the function of releasing lightning current, and the phenomenon that the external insulation characteristic of the insulator is damaged due to lightning flashover is prevented. In the embodiment of the application, even if the ground wire is seriously iced, the insulator still can bear the action of the DC ice melting voltage after the outer insulation of the insulator is iced, and flashover does not occur.
In one embodiment, the apparatus for ground wire section insulation further comprises a foundation tower, wherein the ground wire bracket 101 is mounted on a tower pole of the foundation tower, at least two first lightning protection anti-ice-flash insulators 102 are mounted on each foundation tower, and each first lightning protection anti-ice-flash insulator 102 is connected to a different ground wire. The tower pole can be made of metal materials, is equivalent to a conductor and is used for hanging the ground wire, and when lightning strike occurs on the ground wire, lightning current can flow into the ground through the tower pole. Each tower pole has two suspension points, each suspension point can be provided with a first lightning protection anti-icing flashover insulator, and each first lightning protection anti-icing flashover insulator can segment and insulate the ground wire at the suspension point from the ground.
In one embodiment, the number of ground supports 101 is at least 3 and includes a first ground support, a second ground support, and the remaining ground supports between the first ground support and the second ground support. The first ground wire support and the second ground wire support are both used for suspending the ground wire through the first lightning protection anti-icing flashover insulator, and the rest ground wire support is used for suspending the ground wire through the second lightning protection anti-icing flashover insulator. For example, the number of the first lightning protection anti-icing flashover insulator 102 may be 4. First lightning protection anti-icing flashover insulators 102 can be installed at two ends of the first ground wire support, and first lightning protection ice flashover insulators 102 can be installed on the second ground wire support and used for hanging at least two ground wires. The remaining ground wire bracket may be fitted with a second lightning protection anti-ice-flash insulator 103. Two ends of the first ground wire bracket can be respectively provided with a first lightning protection anti-icing flashover insulator 102, and two ground wires can be suspended through the two first lightning protection anti-icing flashover insulators and are insulated in a segmented manner. Two ends of the second ground bracket can be respectively provided with a first lightning protection anti-icing flashover insulator 102, and two ground wires can be hung through the two first lightning protection anti-icing flashover insulators and are isolated in a segmented mode. The inner part of the ground wire can be a steel core stranded wire, and the outer layer can be a plurality of strands of aluminum stranded wires for leading current into the ground. Two second lightning protection anti-icing flashover insulators 103 can be further mounted at two ends of the rest ground wire support to support the sectional ground wire.
Fig. 2 schematically illustrates a structural schematic diagram of a first lightning protection and anti-icing flashover insulator according to an embodiment of the present application. As shown in fig. 2, in one embodiment, the first lightning protection and anti-icing flashover insulator includes a first composite insulator 202, a second composite insulator 203 and a second lightning arrester 204 which are connected with each other and have an inverted Y-shape. The second surge arrester 204 forms a first branch, the first composite insulator 202 forms a second branch and the second composite insulator 203 forms a third branch. The first composite insulator 202 is provided with a discharge gap, the first end of the first composite insulator 202 is connected with a first subsection ground wire, and the second end of the first composite insulator 202 is connected with the first end of the second composite insulator 203; and the second composite insulator 203 is provided with a discharge gap, the second end of the second composite insulator 203 is connected with the second segment ground wire, and the first composite insulator 202 and the second composite insulator 203 are used for gap discharge to guide current into the ground. And a second lightning arrester 204, wherein a first end of the second lightning arrester 204 is connected with the ground wire bracket 101, and a second end of the second lightning arrester 204 is respectively connected with the first composite insulator 202 and the second composite insulator 203, and is used for suspending the first segment ground wire and the second segment ground wire so as to bear the tensile load of each segment ground wire.
When the vicinity of the segment of the ground wire is struck by lightning or the lightning current transmitted along the ground wire reaches the first lightning protection and ice-proof lightning-flashover insulator of the segment ground wire, the discharge gap between the first composite insulator 202 and the second composite insulator 203 is broken down to discharge, and the lightning current is released to the ground through the second lightning arrester 204. Because the effect of the resistance and the absorbed energy of second arrester 204, behind second arrester 204, the amplitude of lightning current reduces by a wide margin, can prevent high amplitude lightning current damage ground wire on the one hand, and the lightning flashover can not take place for the outer insulating surface of the first lightning protection anti-icing lightning insulator of on the other hand, just can not receive the injury of thunder and lightning discharge arc yet. The lightning flashover is a phenomenon that when the ground wire is struck by lightning, a gas or liquid dielectric medium around a solid insulator connected with the ground wire is broken down and discharges along the surface of the solid insulator.
Fig. 3 schematically shows an internal structure view of a second lightning arrester provided in an embodiment of the present application. As shown in fig. 3, it can be seen that the second lightning arrester includes a zinc oxide resistor disc 301, a glass fiber core rod 302, a ball joint fitting 303, a ball head fitting 304, a silicon rubber shed 305 and an insulating cylinder 306. The zinc oxide resistance card 301 is sleeved on the glass fiber core rod 302, the glass fiber core rod 302 is used for connecting the ball socket fitting 303 and the ball head fitting 304, the insulating cylinder 306 is tightly sleeved on the zinc oxide resistance card 301, and the outer portion of the insulating cylinder 306 is covered with a silicon rubber umbrella skirt with a large umbrella structure and a small umbrella structure.
The zinc oxide resistance chip 301 can realize high-resistance grounding of the ground wire and release induced charges on the ground wire. For example, when a ground wire is struck by lightning, on one hand, the linear resistance of the small current region of the zinc oxide resistance sheet 301 can greatly reduce the static induction voltage on the ground wire, and on the other hand, the nonlinear volt-ampere characteristic of the large current region of the zinc oxide resistance sheet 301 can also effectively release the lightning current, so that the lightning strike flashover of the external insulation of the first lightning protection anti-ice flashover insulator is prevented. The glass fiber core rod 302 is a composite material which uses glass fiber and products thereof as reinforcing materials and synthetic resin as basic materials. The glass fiber core rod 302 has good insulating properties, can maintain good dielectric properties at high frequencies, and can be used to make insulators. The insulator barrel 306 is cylindrical and the material may be any rigid, electrically insulating material, including, for example, a thermosetting or curable resin (such as an epoxy).
In one embodiment, the apparatus for ground segment insulation may further comprise a second lightning protection anti-ice-flash insulator comprising the first lightning arrester and the support mechanism. The first lightning arrester comprises a zinc oxide resistor disc and an external insulating cylinder, and the zinc oxide resistor disc is tightly sleeved in the external insulating cylinder of the first lightning arrester. The zinc oxide resistance card can be an annular zinc oxide resistance card, and can eliminate static induced voltage generated by direct current on the ground wire and high-frequency transient overvoltage induced on the ground wire when the running state of the circuit changes. The zinc oxide resistance card has the characteristic of linear resistance under small current, namely the resistance value of the zinc oxide resistance card does not change along with the change of input voltage and current under small current. Static induction voltage generated by uninterrupted power supply of the direct current line and high-frequency transient overvoltage generated by the change of the running state of the line can be eliminated by the zinc oxide resistance card.
In one embodiment, the zinc oxide resistor sheet is tightly sleeved in the external insulating cylinder of the first lightning arrester and is used for eliminating static induced voltage generated by direct current on the ground wire and eliminating high-frequency transient overvoltage induced on the ground wire when the running state of the line changes.
In one embodiment, the first lightning arrester further comprises a fiberglass core rod, ball-and-socket fittings, ball-and-head fittings, and an outer shed. The glass fiber core rod is sleeved with a zinc oxide resistance card, two ends of the glass fiber core rod are respectively connected with a ball socket hardware fitting and a ball head hardware fitting, and the outer umbrella skirt covers the outer insulating cylinder. The external umbrella skirt is of a large umbrella structure and a small umbrella structure, and the large umbrella structure and the small umbrella structure are formed by arranging a plurality of two large umbrellas with the same diameter and a small umbrella between every two adjacent large umbrellas. The outer umbrella skirt of the second lightning-proof anti-icing and anti-flashover insulator can be made of silicon rubber materials, can protect the inner core rod from being influenced by weather and electric corrosion, and can be used for bearing direct-current ice melting voltage.
Fig. 4 schematically shows a structural block diagram of a base tower provided in an embodiment of the present application. As shown in fig. 4, a foundation tower 400 comprises a tower pole 401, a device 402 for insulation of the ground segment, wherein a ground bracket is mounted on the tower pole 401.
Fig. 5 schematically shows a block diagram of a protection device for a ground wire according to an embodiment of the present application. As shown in fig. 5, a protection device 500 for a ground wire includes: the base tower 400 described above; the two ends of the ice melting device 502 are respectively connected with the first lightning protection and ice flash prevention insulators corresponding to the two ground wires, and the ice melting device is used for increasing the current of the ground wires so as to accelerate the melting speed of the ice coated on the ground wires; and the conducting wire is used for connecting the head ends of the two ground wires and/or the tail ends of the two ground wires so as to form an electrifying loop between the ground wires.
In an embodiment, the ground line of the ice-covered area is melted by the ice melting device 502, wherein the ice melting device 502 may be an existing general ice melting device, which is not described herein again.
Fig. 6 schematically shows an application environment diagram of a protection device for a ground wire according to an embodiment of the application. When the ground wires in the icing area are melted, the ground wires in the area easy to ice are separated from the whole ground wire line by adopting a ground wire sectional insulation device, the head ends or tail ends of the two icing ground wires are in short circuit by utilizing a wire, and the tail ends or head ends of the two icing ground wires are connected to the ice melting device, wherein the ice melting device can adopt a kilovolt direct current ice melting device to melt the ice of the icing ground wires. In the embodiment of the application, the ice melting device is equivalent to a direct current power supply and is provided with two output terminals, one end of each output terminal is a positive electrode, the other end of each output terminal is a negative electrode, the output terminals are respectively connected with the head ends or the tail ends of two conducting wires, the ground wire is equivalent to a resistor, a direct current loop is formed by the ground wire, the ice melting current on the ground wire is the current in the direct current loop, and joule heat is generated by the current in the loop to melt the ice coated on the ground wire. In an embodiment of the application, a kilovolt direct current deicing device can be used for applying a large current to the ground wire, so that the deicing speed of the ground wire is accelerated.
Fig. 7 schematically shows a flow diagram illustration of a method for ground segment insulation according to an embodiment of the application. As shown in fig. 7, in an embodiment of the present application, there is provided a method for insulation of a ground segment, which is applied to the above-mentioned protection device for a ground wire, and includes:
and step 701, segmenting the ground wire, and separating the easily-iced ground wire from the complete ground wire line.
And step 702, eliminating the induced voltage on the ground wire easy to be coated with ice.
And step 703, forming a power-on loop for the ground wire easy to be coated with ice.
And step 704, melting ice on the easily-icing ground wire.
The first lightning protection anti-icing flashover insulator may include a first composite insulator, a second composite insulator, and a second lightning arrester. The first lightning protection anti-icing flashover insulator can separate the icing ground wire from the whole ground wire circuit, and segmented insulation of the icing ground wire is achieved. The second lightning protection anti-icing flashover insulator may include a first lightning arrester and a supporting mechanism. The second lightning protection anti-icing flashover insulator is arranged on the ground wire support in the middle section of the icing ground wire, so that the induced voltage on the icing ground wire can be eliminated. The first lightning protection anti-icing flashover insulator and the second lightning protection anti-icing flashover insulator can be used for realizing insulation of an icing ground wire section on one hand, and can meet the condition of implementing direct-current deicing on the ground wire on the other hand.
According to the technical scheme, the ice-covered ground wire section is separated from the whole ground wire through the first lightning protection anti-ice-flash insulator, on the basis that the lightning protection function of the ground wire is not influenced, the sectional insulation of the ground wire is realized, the direct discharge of the ground wire to the pole tower caused by lightning overvoltage can be prevented, the surface insulation damage of the insulator can be prevented, the ice-melting failure of the ice-covered ground wire is effectively prevented, the loop impedance of a lightning discharge channel is increased through the lightning protection anti-ice-flash insulator, the energy of lightning waves is consumed by the zinc oxide resistor inside the lightning discharge channel, the lightning current amplitude is reduced, the damage of the lightning current to the ground wire is effectively reduced, and the safety of the ice-melting of the ground wire is also improved.
The embodiments of the present invention are not limited to this, and can be applied to any application for insulating a ground segment. The preferred embodiments of the present application have been described in detail with reference to the accompanying drawings, however, the present application is not limited to the details of the above embodiments, and various simple modifications may be made to the technical solution of the present application within the technical idea of the present application, and these simple modifications all belong to the protection scope of the present application.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising one of 8230; \8230;" 8230; "does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (10)
1. An apparatus for ground segment insulation, the apparatus comprising:
the ground wire bracket is used for suspending a ground wire;
the first lightning protection and ice flashover prevention insulator comprises a first branch, a second branch and a third branch which are fixedly connected, wherein the first branch is connected with the ground wire support, and the second branch and the third branch are respectively connected with different sectional ground wires;
the second lightning protection anti-icing flashover insulator comprises a first lightning arrester;
the first end of the first lightning arrester is connected with the ground wire support, and the second end of the first lightning arrester is connected with the sectional ground wire, so that damage caused by lightning striking the sectional ground wire is reduced.
2. The apparatus of claim 1, wherein the second lightning protection and anti-ice-flash insulator further comprises:
and the supporting mechanism is embedded in the first lightning arrester, is connected with the ground wire bracket and is used for supporting the sectional ground wire so as to enable the sectional ground wire to be far away from the ground which is easy to cover ice.
3. The apparatus of claim 1, wherein the first arrester comprises:
the circuit comprises a zinc oxide resistance chip and an external insulating cylinder, wherein the zinc oxide resistance chip is tightly sleeved in the external insulating cylinder and is used for eliminating static induced voltage generated by direct current on the ground wire and eliminating high-frequency transient overvoltage induced on the ground wire when the running state of the circuit changes.
4. The apparatus of claim 3, wherein the first arrester further comprises:
the device comprises a glass fiber core rod, a ball socket hardware fitting, a ball head hardware fitting and an outer umbrella skirt;
the zinc oxide resistor disc is sleeved on the glass fiber core rod, two ends of the glass fiber core rod are respectively connected with the ball socket hardware fitting and the ball head hardware fitting, the external umbrella skirt covers the external insulating cylinder, the external umbrella skirt is of a large umbrella structure and a small umbrella structure, the large umbrella structure and the small umbrella structure are formed by arranging a plurality of two large umbrellas with equal diameters and a small umbrella between every two adjacent large umbrellas, and the large umbrella structure and the small umbrella structure are used for bearing direct-current ice melting voltage.
5. The apparatus of claim 1, wherein the first lightning protection and anti-icing flashover insulator comprises a first composite insulator, a second composite insulator and a second lightning arrester which are connected with each other and have an inverted Y shape; the second surge arrester forms the first branch, the first composite insulator forms the second branch, and the second composite insulator forms the third branch;
the first composite insulator is provided with a discharge gap, the first end of the first composite insulator is connected with a first subsection ground wire, and the second end of the first composite insulator is connected with the first end of the second composite insulator;
the second composite insulator is provided with a discharge gap, the second end of the second composite insulator is connected with a second segment ground wire, and the first composite insulator and the second composite insulator are used for gap discharge to guide current into the ground;
and the first end of the second lightning arrester is connected with the ground wire bracket, and the second end of the second lightning arrester is respectively connected with the first composite insulator and the second composite insulator and used for suspending the first subsection ground wire and the second subsection ground wire so as to bear the tensile load of each subsection ground wire.
6. The apparatus of claim 5, wherein the second arrester comprises:
the zinc oxide resistor disc is sleeved on the glass fiber core rod, two ends of the glass fiber core rod are respectively connected with the ball socket hardware fitting and the ball head hardware fitting, the insulating cylinder is tightly sleeved on the zinc oxide resistor disc, and the outer portion of the insulating cylinder is covered with a silicon rubber umbrella skirt with a large umbrella structure and a small umbrella structure.
7. The apparatus of any one of claims 1 to 6, wherein the number of the ground wire holders is at least 3, and comprises a first ground wire holder, a second ground wire holder, and a remaining ground wire holder located between the first ground wire holder and the second ground wire holder, wherein the first ground wire holder and the second ground wire holder both suspend a ground wire through the first lightning protection anti-ice-flashover insulator, and the remaining ground wire holder suspends a ground wire through the second lightning protection anti-ice-flashover insulator.
8. A foundation tower comprising a tower pole and a device for insulation of a ground segment according to any one of claims 1 to 7, the ground support being mounted to the tower pole.
9. A protection device for earth wires, comprising:
the foundation column of claim 8;
the two ends of the ice melting device are respectively connected with the first lightning protection and ice flash prevention insulators corresponding to the two ground wires and used for increasing the current of the ground wires;
and the conducting wire is used for connecting the head ends of the two ground wires and/or the tail ends of the two ground wires.
10. A method of insulation of a ground wire section, characterized by being applied to a protection device for a ground wire according to claim 9, the method comprising:
the ground wire is segmented, and the ground wire which is easy to cover ice is separated from the complete ground wire circuit;
eliminating the induced voltage on the ground wire easy to cover ice;
forming a power-on loop of the ice-easy ground wire;
and melting ice on the ground wire easy to cover ice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211254812.XA CN115458257A (en) | 2022-10-13 | 2022-10-13 | Device, protective equipment and method for ground wire section insulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211254812.XA CN115458257A (en) | 2022-10-13 | 2022-10-13 | Device, protective equipment and method for ground wire section insulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115458257A true CN115458257A (en) | 2022-12-09 |
Family
ID=84309010
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211254812.XA Pending CN115458257A (en) | 2022-10-13 | 2022-10-13 | Device, protective equipment and method for ground wire section insulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115458257A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117292884A (en) * | 2023-10-09 | 2023-12-26 | 国网山东省电力公司济南供电公司 | Energy-saving insulation protection device for overhead ground wire of high-voltage transmission line |
-
2022
- 2022-10-13 CN CN202211254812.XA patent/CN115458257A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117292884A (en) * | 2023-10-09 | 2023-12-26 | 国网山东省电力公司济南供电公司 | Energy-saving insulation protection device for overhead ground wire of high-voltage transmission line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1239823C (en) | Wind power installation | |
| Al-Gheilani et al. | Stress control methods on a high voltage insulator: A review | |
| CN107431334B (en) | Insulation device for overhead line | |
| CN115458257A (en) | Device, protective equipment and method for ground wire section insulation | |
| CN104952562A (en) | Anti-thunder and anti-icing pin type composite insulator for 10kV power transmission line | |
| CN114607573A (en) | Wind power blade lightning protection system | |
| CN111431129A (en) | Transmission line without lightning conductor | |
| CN107301907B (en) | Anti-icing lightning protection insulator | |
| CN206225783U (en) | Atmospheric electric field self adaptation plasma lightning protection device and application have the antenna of lightning protection device | |
| CN112186700B (en) | Lightning protection method for power transmission line | |
| CN208126940U (en) | A kind of compound pillar insulator with lightning protection function | |
| CN208189276U (en) | A kind of high voltage power cable | |
| CN206595546U (en) | A kind of voltage protector with disconnector | |
| CN115882412A (en) | Ice melting method for ground wire of wire without power failure | |
| RU203898U1 (en) | BREAKDOWN AND OVERLAPPED INSULATOR INDICATOR | |
| KR100962248B1 (en) | High performance dipole lightning rod | |
| CN109786046B (en) | 500kV line lightning-proof anti-icing flashover composite insulator | |
| CN111630741B (en) | Transmission line conductor bridging device and application in method for modifying or manufacturing overhead line tower | |
| CN209071059U (en) | A kind of outer series connection fixed interval (FI) Zinc-Oxide Arrester of 10kV route | |
| CN105097157A (en) | Drop-type lightning arrester | |
| CN108231300B (en) | A kind of parallel connection clearance device of anti-thunder insulator | |
| US1847460A (en) | Means for increasing flash-over voltage and resistance between high tension conductors and ground | |
| CN204216538U (en) | 10kV insulated overhead line | |
| US1847421A (en) | Transmission tower having insulating sections with protecting gaps or resistance | |
| RU2626456C1 (en) | Limitation method of atmospheric overvoltage on high-voltage overhead power transmission lines and device for its implementation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |