Method for replacing tension insulator of extra-high-voltage direct-current whole tower

Abstract

The invention discloses a method for replacing a tension insulator of an extra-high voltage direct current whole tower, and relates to the technical field of power grid transmission line maintenance.The self-explosion rate of the glass insulator is high, the design strength and the boundary dimension of the hardware fittings and the insulator in the extra-high voltage line are greatly improved compared with those of a traditional high voltage line, so the glass insulator of the extra-high voltage direct current whole tower is difficult to replace. The method mainly comprises: performing entering preparation; hanging a semi-permanent grounding wire; winching and mounting; disassembling the spacer; removing the grading ring; if the grounding electrode and the tower are erected on the same tower, insulating and wrapping the grounding electrode wire; carrying out insulation protection on drainage absorption; hanging a temporary anchoring system, and arranging a safety system; installing astringing pulley block and a fixture; removing the connection of the insulator string; removing the insulator chain loosely; installing a new insulator string; and recovering drainage, and installingthe spacer and the grading ring. According to the method, replacement of the extra-high-voltage direct-current whole-tower strain insulator is conveniently achieved, the replacement difficulty is reduced, safety and reliability are achieved, and the construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of power grid transmission line maintenance, in particular to a method for replacing tension insulators in all UHV DC towers. Background technique [0002] At present, more and more UHVDC transmission lines are used for long-distance power grid transmission. The stability of line operation is of great significance for alleviating the contradiction between power supply and demand and ensuring safe and reliable power supply. With the increase of the operating life of the line, the problems in the operation and maintenance of the UHV DC transmission line have become more and more prominent. There is a big difference in the lines. [0003] Insulators generally include glass insulators and porcelain insulators. The main purpose is to fix the wires on the iron tower and insulate the wires from the iron tower. Glass insulators are relatively popular in the current transmission lines above 500kV because of their ze...

AI Technical Summary

Problems solved by technology

The glass insulator is light in weight and has a high self-explosion rate, resulting in a high replacement rate

Compared with traditional high-voltage lines, the design strength and dimensions of line fittings and insulators in UHV lines have been greatly improved. Therefore, the process of replacing glass insulators in UHV DC full towers is more complicated and difficult

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