RU2689383C1 - INTERPHASE REMOTE STRUT OF OVERHEAD TRANSMISSION LINES WITH VOLTAGE OF 35-220 kV - Google Patents

Abstract

FIELD: power engineering.

SUBSTANCE: invention relates to the field of electric power industry, in particular, to the interphase remote struts of overhead transmission lines with voltage of 35÷220 kV. Spacer comprises insulating module (1) with enders (2, 3) made at its ends, which are hinged in one or more planes are fixed to connection attachment units (4, 5) to wires (6, 7) of overhead transmission lines. Insulating module is made of fiberglass, basalt-plastic or acid-resistant rods interconnected by one or several couplings (8).

EFFECT: design of the spreader allows adjusting the overall structural length of the insulating module from a minimum value of 40 % to the maximum possible value, thereby providing a minimum length of the leak path and substantially increasing the strength of the brace.

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Description

The invention relates to the field of electric power industry, in particular to interphase distance struts of overhead power lines with a voltage of 35 ÷ 220 kV.

A known interphase spacer for fixing the wires of an overhead transmission line, comprising insulating traction with terminators at its ends for securing the wires, is made of a composite of at least two elements interconnected, with the terminators made with longitudinal channels on the inner surface of one the sides of which are made spikes, and the second side is made with a through hole with a bevel and an inclined protrusion [1].

This spacer is designed for installation on lines that are under voltage, which has led to a significant complication of the structural implementation of its insulating thrust with end fittings. Struts, mounted, as a rule, on non-live overhead power lines, are much simpler in design and the technological process of their manufacture is significantly less expensive and complicated.

An intraphase insulating strut is also known, comprising a housing connected to the die clamps for fastening the components of the split wire, each of which is provided with supporting and pressing dies; the body is made in the form of an axial rod of a dielectric material and has tracking protective ribs, and the die clips are rigidly fixed on the body, with the pressure and support dies connected by means of a bolt joint [2].

In this well-known strut, there is no optimal relationship between the values of the construction lengths of attachment points to overhead wires and the values of the building lengths of the insulating body, which is extremely important for achieving high electrical characteristics of the interphase distance struts, especially if they are mounted on superhigh-power and ultra-high voltage power lines (over 330 kV).

The closest technical solution in relation to the proposed is an interphase distance strut of overhead power lines with voltage of 35 ÷ 220 kV, containing an insulating module with at least two end fittings made at its ends, hinged in one or several planes attached to the connecting attachments to the wires overhead power lines [3].

The insulating part of such an interphase distance spacer cannot provide the necessary electrical strength (especially under conditions of atmospheric and industrial pollution), since it has an insufficient creepage distance (the ratio of the construction length of the insulation module to the construction length of the spacer). As the operating experience of the spacers of this type showed, the total construction length of the insulation module should be more than 40% of the construction length of the spacer, which is technologically achieved by using interconnecting rods of the insulation module, rather than performing the insulation module as a single whole element.

The applicant set himself the specific task of developing an interphase distance strut of overhead lines with a voltage of 35 ÷ 220 kV, which is characterized by sufficient simplicity of its technological implementation, high electrical strength while maintaining mechanical characteristics by providing a minimum length of the spacer leakage path, and increased operational reliability, especially when atmospheric and industrial pollution. The above-mentioned positive technical result was achieved due to a new set of essential design features of the proposed interphase distance strut of overhead lines with a voltage of 35 ÷ 220 kV, presented in the following claims: “interphase distance strut of overhead power lines with a voltage of 35 ÷ 220 kV, containing an insulation module c, at least two terminations made at its ends, hinged in one or several planes fixed to the connecting nodes lam fastening to the wires of overhead power lines; the insulation module is made of at least two fiberglass or basalt plastic rods connecting with each other, at least one coupling, with the total construction length of the insulation module being more than 40% of the construction strut length; a clutch made in the form of a cylindrical body, pressed at the ends on the connecting rods of the insulating module; a clutch made in the form of a cylindrical body, mounted on the ends of the connected rods of the insulation module by means of a collet chuck; the cores of the insulation module are acid resistant. "

The invention is illustrated by drawings, where in FIG. 1 shows a general view of the interfacial spacer of overhead power lines with a voltage of 35 ÷ 220 kV, made in accordance with the present invention.

The inventive interfacial spacer for overhead power lines with a voltage of 35 ÷ 220 kV contains an insulating module 1 with two end fittings 2, 3 made at its ends, which are hinged in one or several planes attached to the mounting attachment points 4, 5 to the wires 6, 7 of overhead lines power lines.

The insulation module is made of fiberglass, basalt-plastic or acid-resistant rods 1, interconnected by one or more couplings 8. The total construction length of the insulation module is more than 40% of the construction strut length.

Coupling 8 is made in the form of a cylindrical body and can be crimped at the ends on the connecting rods of the insulation module 1 or fixed to the ends of the connecting rods of the insulation module 1 by means of a collet chuck, which allows you to securely fasten the coupling 8 on the rods of the insulation module (eliminating the coupling from the rods).

The invention works as follows:

The proposed interphase distance strut is designed for insulated fixing of wires and cables in the span, it significantly limits the amplitude of oscillations and ensures the preservation of the insulation distances between wires of different phases and between wires and cables of overhead power lines of 35 ÷ 220 kV. The spacer insulation module is made of fiberglass, basalt-plastic or acid-resistant rods 1, interconnected by one or more couplings 8, which increases the mechanical strength of the insulation module and spacer as a whole, as well as its reliability in operation in difficult atmospheric conditions caused by industrial pollution and intense acidic rains. In addition, the spacer design allows the total construction length of the insulation module 1 to be adjusted from a minimum value of 40% (less than 40% of the insulation module length is insufficient to ensure the minimum creepage distance) from the construction spacer length to the maximum possible value (limited solely by the technological possibilities of connection insulating module to the wires of the overhead power line), thereby ensuring the minimum creepage distance and thus significantly increasing the the stricture strength To prevent damage to the spacers of wires or cables of overhead power lines, they are usually mounted using spiral protectors, and to eliminate the negative effects of corona discharges, protective screens are mounted on the spacer 9.

Information sources:

[one]. Description of the invention to the author's certificate "Interfacing distance strut for fixing the wires of the overhead power line" №1746453, Н02G 7/12, declared 10/01/1990, published 07.07.1992.

[2]. The description of the utility model patent “Intraphase insulating strut” No. 136930, Н02G 7/12, announced on 07/17/2013, published on 01/20/2014.

[3]. Description to the patent for the invention “Interphase distance strut of overhead power lines with voltage of 35-1150 kV” No. 2577034, Н02G 7/12, announced on 25.11.2014, published on 10.03.2016.

[four]. Description of the invention to the author's certificate "Interfacial strut" No. 1543492, Н02G 7/12, declared 15.06.1987, published 15.02.1990.

[five]. Description of the invention to the author's certificate "Interfacial strut" №1220039, Н02G 7/12, declared 06/21/1984, published 03/23/1986.

[6]. Description of the invention to the author's certificate "Interphase insulating strut" №1501206, Н02G 7/12, declared 07.03.1984, published 08.15.1989.

[7]. Description of the invention to the author's certificate "High-voltage interphase spacer" №1443072, Н02G 7/12, declared 09/01/1984, published 12/07/1988.

[eight]. Description of the invention to the author's certificate "Device for fastening the interphase spacer to the wires of the phases of an overhead transmission line" No. 1376165, Н02G 7/12, declared 04/06/1986, published 02/23/1988.

Claims (4)

1. Interphase distance strut of overhead power lines with voltage of 35 ÷ 220 kV, containing an insulating module with at least two end fittings made at its ends, pivotally attached to one or several planes attached to connecting attachment points to overhead power line wires, characterized in that insulating the module is made of at least two fiberglass or basalt-plastic rods interconnected by at least one coupling, with the total construction for on insulating module is more than 40% of the construction length of the spacers. 2. The strut of claim. 1, characterized in that the coupling, made in the form of a cylindrical body, is pressed at the ends on the connecting rods of the insulating module. 3. The strut of claim. 1, characterized in that the coupling, made in the form of a cylindrical body, is fixed on the ends of the connecting rods of the insulation module by means of a collet chuck. 4. The strut of claim. 1, characterized in that the terminals of the insulating module are made acid-resistant.

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