CN211720240U

CN211720240U - Prevent mounting structure of 500kV circuit arrester lightning protection inefficacy

Info

Publication number: CN211720240U
Application number: CN202020655348.5U
Authority: CN
Inventors: 张冬冬; 刘守豹; 熊中浩; 杨剑; 李欣
Original assignee: Sichuan Chuanhui Hydropower Investment Co ltd; Guangxi Guiguan Electric Power Co ltd; Datang Hydropower Science and Technology Research Institute Co Ltd
Current assignee: Sichuan Chuanhui Hydropower Investment Co ltd; Guangxi Guiguan Electric Power Co ltd; Datang Hydropower Science and Technology Research Institute Co Ltd
Priority date: 2020-04-26
Filing date: 2020-04-26
Publication date: 2020-10-20
Anticipated expiration: 2030-04-26

Abstract

The utility model discloses a prevent mounting structure of 500kV line arrester lightning protection inefficacy, insulator chain, split conductor, composite insulator clearance, arrester, acting as go-between and the fixed gold utensil that connects gradually including the shaft tower, insulator chain keeps away from split conductor's one end with the shaft tower is connected, fixed gold utensil sets up on the shaft tower, still be provided with the counter on the shaft tower, the arrester pass through the lead wire with the counter electricity is connected. The utility model discloses a prevent that mounting structure of 500kV circuit arrester lightning protection inefficacy can ensure that circuit arrester moves before insulator chain under the action of large amplitude counterattack lightning current.

Description

Prevent mounting structure of 500kV circuit arrester lightning protection inefficacy

Technical Field

The utility model relates to an arrester technical field especially relates to a prevent mounting structure of 500kV line arrester lightning protection inefficacy.

Background

The 500kV power transmission line is the main power of power transmission in China, the lightning trip-out rate of the power transmission line in a complex terrain area and a large span is high, and the lightning arrester is used as a lightning protection means and is a main measure for lightning protection of the 500kV power transmission line. Because the length of the 500kV line arrester is large, the arrester cannot be directly installed in parallel with the insulator string like the arrester of the low-voltage-class transmission line, and a suspension installation mode is often adopted. When the lightning arrester is installed in a hanging mode, the potential difference caused by counterattack lightning at the two ends of the insulator string and the line lightning arrester is inconsistent, the lightning arrester lightning protection is possibly disabled by large counterattack lightning current, namely the problem that the insulator string is in flashover due to the fact that the lightning arrester does not act occurs, and the lightning protection effect of the lightning arrester cannot be exerted.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a prevent mounting structure of 500kV circuit arrester lightning protection inefficacy to solve the problem that above-mentioned prior art exists, ensure that circuit arrester moves prior to insulator chain under the effect of large amplitude counterattack lightning current.

In order to achieve the above object, the utility model provides a following scheme:

the utility model provides a prevent mounting structure of 500kV line arrester lightning protection inefficacy, insulator chain, split conductor, composite insulator clearance, arrester, acting as go-between and the fixed gold utensil that connects gradually including the shaft tower, insulator chain keeps away from split conductor's one end with the shaft tower is connected, fixed gold utensil sets up on the shaft tower, still be provided with the counter on the shaft tower, the arrester pass through the lead wire with the counter electricity is connected.

Preferably, the horizontal heights of the insulator string, the split conductor, the composite insulator gap, the lightning arrester, the stay wire and the fixed hardware are sequentially reduced.

Preferably, an insulator is fixedly arranged on the fixed hardware fitting, and one end of the stay wire is connected with the insulator.

Preferably, the installation position of the counter is on the same horizontal plane with the suspension point of the top end of the insulator string.

Preferably, the composite insulator gap, the lightning arrester, the lead and the counter form a 500kV line lightning arrester.

Preferably, the potential clamping function of the lead wire enables the voltages borne by the two ends of the insulator string and the 500kV line arrester to be consistent all the time.

The utility model discloses for prior art gain following technological effect:

the utility model discloses a prevent that mounting structure of 500kV circuit arrester lightning protection inefficacy can ensure that circuit arrester moves before insulator chain under the action of large amplitude counterattack lightning current. The utility model discloses a with the potential difference at 500kV circuit arrester both ends remain the same with insulator chain both ends potential difference's mode throughout, the problem of 500kV circuit arrester lightning protection inefficacy under the traditional mounting means that prevents that big amplitude lightning current from causing ensures that circuit arrester moves before insulator chain all the time under the lightning current effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the installation structure for preventing the lightning protection failure of the 500kV line arrester of the present invention;

wherein: 1-pole tower, 2-insulator string, 3-split conductor, 4-composite insulator gap, 5-lightning arrester, 6-stay wire, 7-insulator, 8-fixed hardware, 9-lead wire and 10-counter.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

As shown in fig. 1: the mounting structure that this embodiment prevented lightning protection failure of 500kV line arrester includes shaft tower 1 and insulator chain 2 that connects gradually, split conductor 3, 7 clearances 4 of composite insulator, arrester 5, act as go-between 6 and fixed hardware fittings 8, the insulator 7 has set firmly on the fixed hardware fittings 8, 6 one end of acting as go-between is passed through insulator 7 and is connected with fixed hardware fittings 8, act as go-between 6 and pass through insulator 7 and fixed hardware fittings 8 and shaft tower 1 and link to each other for arrester 5 does not have electrical connection with shaft tower 1.

The top end of the insulator string 2 is connected with the tower 1, and the horizontal heights of the insulator string 2, the split conductor 3, the composite insulator 7 gap 4, the lightning arrester 5, the stay wire 6 and the fixed hardware fitting 8 are sequentially reduced; the fixed hardware 8 is arranged on the tower 1, a counter 10 is further arranged on the tower 1, and the lightning arrester 5 is electrically connected with the counter 10 through a lead 9.

It is worth noting that the mounting position of the counter 10 and the suspension point at the top end of the insulator string 2 are on the same horizontal plane, so as to ensure that the voltage borne by the two ends of the lightning arrester 5 is the same as the voltage borne by the two ends of the insulator string 2, ensure that the line lightning arrester 5 can act preferentially when being struck by lightning near the mounting point, and achieve the purpose of protecting the insulator string 2.

The composite insulator 7 gap 4, the lightning arrester 5, the lead 9 and the counter 10 form a 500kV line lightning arrester. The potential clamping function of the lead 9 enables the voltages born by the two ends of the insulator string 2 and the 500kV line arrester to be consistent all the time.

The utility model discloses a with the potential difference at 500kV circuit arrester both ends remain throughout with the same mode of insulator chain 2 both ends potential difference, the problem of 500kV circuit arrester lightning protection inefficacy under the traditional mounting means that prevents that big amplitude lightning current from causing ensures that circuit arrester moves before insulator chain 2 all the time under the lightning current effect.

In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.

Claims

1. The utility model provides a prevent mounting structure of 500kV line arrester lightning protection inefficacy which characterized in that: the lightning arrester comprises a tower, and an insulator string, a split conductor, a composite insulator gap, an arrester, a stay wire and a fixed fitting which are sequentially connected, wherein one end of the insulator string, which is far away from the split conductor, is connected with the tower, the fixed fitting is arranged on the tower, a counter is further arranged on the tower, and the arrester is electrically connected with the counter through a lead.

2. The mounting structure for preventing lightning protection failure of a 500kV line arrester according to claim 1, characterized in that: the horizontal heights of the insulator string, the split conductor, the composite insulator gap, the lightning arrester, the stay wire and the fixed hardware fitting are sequentially reduced.

3. The mounting structure for preventing lightning protection failure of a 500kV line arrester according to claim 1, characterized in that: and an insulator is fixedly arranged on the fixed hardware fitting, and one end of the stay wire is connected with the insulator.

4. The mounting structure for preventing lightning protection failure of a 500kV line arrester according to claim 1, characterized in that: the mounting position of the counter and the suspension point at the top end of the insulator string are on the same horizontal plane.

5. The mounting structure for preventing lightning protection failure of a 500kV line arrester according to claim 1, characterized in that: the composite insulator gap, the lightning arrester, the lead and the counter form a 500kV line lightning arrester.

6. The mounting structure for preventing lightning protection failure of a 500kV line arrester according to claim 5, characterized in that: and the potential clamping function of the lead wire enables the voltages born by the insulator string and the two ends of the 500kV line arrester to be consistent all the time.