CN105098694A - Overhead lightning line erection method based on typical design of power distribution network - Google Patents

Abstract

The invention relates to a method for erecting overhead lightning protection wires based on a typical design of a distribution network. Each pole is fixed with a horizontal cross arm, and multiple sets of lightning protection components are installed on the cross arm. Two to four circuits of overhead insulated conductors are supported and installed above the above lightning protection components, and the second to four circuits of overhead insulated conductors are grounded through the zinc oxide arrester of the lightning protection component. , erect overhead lightning protection wires on the pole top lightning protection assembly, the pole top lightning protection assembly is composed of lightning protection pillar insulators, zinc oxide arresters with gaps and lightning protection wire tension strings, overhead lightning protection wires are guided through lightning protection tension strings The zinc oxide arrester with gaps is connected with the lightning protection pillar insulator, and the zinc oxide arrester with gaps is grounded through the grounding wire in the pole. The invention erects overhead lightning protection wires on the pole top lightning protection component to solve the problem of disconnection of insulated wires by lightning strikes.

Description

A Method for Erection of Overhead Lightning Arrester Based on Typical Design of Distribution Network

technical field

The invention belongs to the technical field of electric power facilities, in particular to a method for erecting overhead lightning conductors based on a typical design of a distribution network.

Background technique

With the popularization and application of insulated wires in distribution lines, the lightning protection technology for insulated wires in open areas has been perplexing operators. Various lightning protection technologies are widely used, and the insulation rate is gradually increasing. The application of lightning protection technology has also attracted much attention. At present, insulated wires are easily broken by lightning strikes, which has become a common problem in the use of insulated wires. The typical design of the State Grid Corporation recommends centralized lightning protection measures, mainly including lightning protection post insulators, zinc oxide arresters with gaps, and lightning protection wires. Zhang string, overhead insulated conductors are grounded through zinc oxide arresters. However, the lightning protection effect of the existing overhead insulated conductors is not good, and lightning strikes often cause disconnection, which affects the operational safety of the power system. Therefore, based on the typical design of State Grid Corporation in 2013, how to select Z2-3 double-circuit (or even three-circuit, four-circuit) overhead insulated conductor line cement It is an urgent task to transform the erection of overhead lightning conductors in the form of rod head arrangement.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, provide a method for erecting overhead lightning conductors based on the typical design of the distribution network, and re-arrange various typical pole heads to solve the problem of disconnection of insulated conductors by lightning strikes.

The present invention solves its technical problem and realizes through the following technical solutions:

A method for erecting overhead lightning conductors based on a typical design of a distribution network, comprising a group of poles arranged at intervals, each pole is fixed with horizontal cross-arms at intervals up and down, and on the cross-arms are installed intervals of Multiple groups of lightning protection components, two to four circuits of overhead insulated wires are supported and installed on the set of wire poles through the above lightning protection components. Zhang Chuan, the two to four circuits of overhead insulated conductors are grounded through zinc oxide arresters, which is characterized in that a pole-top lightning protection component is arranged on the top of the group of poles, and a pole-top lightning protection component is erected on the pole top lightning protection component. Overhead lightning protection line, the pole top lightning protection component is composed of lightning protection post insulators, zinc oxide arresters with gaps and lightning protection wire tension strings, and the overhead lightning protection line is connected by lightning protection guiding tension strings and lightning protection post insulators Zinc oxide arrester with gap, the zinc oxide arrester with gap is grounded through the grounding wire inside the pole.

Moreover, the protection angle of the overhead lightning conductor satisfies the requirement of less than 25 degrees.

Moreover, the protection angle with the two to four circuits of overhead insulated conductors meets the requirement of less than 25 degrees.

Advantage of the present invention and beneficial effect are:

1. This paper is based on the erection method of overhead lightning protection wires based on the typical design of distribution network. By analyzing and comparing the erection methods of overhead insulated wires in typical design of distribution network, and calculating the lightning protection angle of overhead ground wires to meet the operation requirements, through the arrangement of various typical The pole head is equipped with a pole top lightning protection component on the top of a group of poles, and an overhead lightning protection line is erected on the pole top lightning protection component to solve the problem of insulated wires being disconnected by lightning. The erection of the overhead lightning protection wire can be completed at the same time as the new construction or renovation of the wire, and each base is grounded through the non-prestressed cement rod body.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

1-pole, 2-cross arm, 3-the first overhead insulated conductor, 4-overhead lightning conductor, 5-the second overhead insulated conductor, 6-lightning protection component, 7-pole top lightning protection component.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the present invention.

A method for erecting overhead lightning conductors based on a typical design of a power distribution network, comprising a group of poles 1 arranged at intervals, each pole is fixed with horizontal cross-arms 2 spaced up and down, and spaced apart on the cross-arms. Multiple groups of lightning protection components 6 are installed, and two to four circuits of overhead insulated wires are supported and installed on a set of poles through the above lightning protection components. In this embodiment, there are two overhead insulated conductors, including the first overhead insulated conductor 3 and the second overhead insulated conductor 5 . The lightning protection component includes a lightning protection post insulator, a gapped zinc oxide arrester and a lightning protection wire strain string. Two to four circuits of overhead insulated conductors are grounded through zinc oxide arresters.

Its innovation lies in: a pole top lightning protection assembly 7 is arranged on the top of a group of electric poles, an overhead lightning protection line 4 is erected on the pole top lightning protection assembly, and the pole top lightning protection assembly consists of lightning protection post insulators, gap The zinc oxide arrester and the lightning protection wire tension string are composed of the overhead lightning protection wire through the lightning protection guiding tension string and the lightning protection post insulator to connect the zinc oxide arrester with gap, and the zinc oxide arrester with gap is grounded through the grounding wire in the pole .

The protection angle of the overhead lightning conductor meets the requirement of less than 25 degrees. The protection angle with two to four overhead insulated conductors meets the requirement of less than 25 degrees.

The overhead lightning protection wire erection method based on the typical design of the distribution network of the present invention, by arranging various typical pole heads, a pole top lightning protection assembly is arranged on the top of a group of electric poles, and an overhead lightning protection assembly is erected on the pole top lightning protection assembly. Lightning conductors are used to solve the problem of disconnection of insulated conductors by lightning strikes.

Although the embodiments and accompanying drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will understand that various alternatives, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims (3)

1. the overhead ground wire erection method based on power distribution network modular design, comprise one group of spaced apart electric pole, all between the upper and lower every the cross-arm being fixed with level on described each electric pole, on cross-arm, interval is provided with multigroup lightning protection assembly, described one group of line bar supports installation two to four times suspended insulated guide wires by above-mentioned lightning protection component, this lightning protection component comprises lightning protection pillar insulator, the zinc oxide arrester of band gap and lightning protection wire tension-resistant string, described two to four times suspended insulated guide wires are grounded by zinc oxide arrester, it is characterized in that: be provided with masthead lightning protection component at the top of described one group of electric pole, this masthead lightning protection component sets up overhead ground wire, described masthead lightning protection component is by lightning protection pillar insulator, the zinc oxide arrester of band gap and lightning protection wire tension-resistant string are formed, described overhead ground wire is by lightning protection guiding strain insulator-string and the zinc oxide arrester in lightning protection pillar insulator connecting band gap, the zinc oxide arrester of band gap is by the ground connection in electric pole.

2. the overhead ground wire erection method based on power distribution network modular design according to claim 1, is characterized in that: the shielding angle of described overhead ground wire is satisfied is less than 25 degree of requirements.

3. the overhead ground wire erection method based on power distribution network modular design according to claim 1, is characterized in that: described meeting with the shielding angle of two to four times suspended insulated guide wires is less than 25 degree of requirements.