Sleeve and tubular busbar bridging overcurrent fitting for 800kV convertor station

Abstract

The invention relates to a sleeve and tubular busbar bridging overcurrent fitting for an 800kV convertor station. The sleeve and tubular busbar bridging overcurrent fitting comprises an anticorona ball, a sleeve terminal fixing fitting, tubular busbar fixing fittings, a cardan joint structure and drainage threads, wherein the anticorona ball is a shell formed by connecting a left hemisphere and a right hemisphere; a left side opening, a right side opening and a top opening are respectively formed in the shell; four long slots are formed in one end of the terminal fixing sleeve and are respectively connected with aluminum alloy clamping seats and copper-aluminum transitional sheets; the tubular busbar fixing fittings are two arched semi-rings; one end of the cardan joint bracket is a connection plate, and the other end of the cardan joint bracket is provided with three hanging lugs; the upper hanging lug is hinged to a perpendicular steering rod; the other end of the perpendicular steering rod is connected with a tubular busbar supporting sliding claw disk with six extending supporting claws; the middle hanging lug is hinged to a transverse steering rod; the other end of the transverse steering rod is inserted into the tubular busbar fixing fitting at the right side opening; the lower hanging lug is fixedly connected with a supporting frame; the three groups of drainage threads are respectively connected with all the fittings.

Description

technical field [0001] The invention relates to an electric power fitting, in particular to a bushing and busbar bridge overcurrent fitting for an 800kV converter station. Background technique [0002] At present, my country has become a major DC power transmission country with the most DC projects in operation and under construction, the largest capacity and the longest lines in the world. The valve hall fittings in the DC converter station can generally be divided into valve hall connecting fittings, halo (ball), shielding half-rings and some transition fittings. With the increase of DC transmission voltage, valve hall fittings have increasingly become an indispensable part of the valve hall. The valve hall fittings of the converter station in our country are basically purchased from abroad, and the cost is relatively high. The valve hall of the converter station is a closed space. The valve hall is equipped with important equipment such as valve towers, bushings, and vo...

AI Technical Summary

Problems solved by technology

At the same time, due to the limited space of the valve hall, the arrangement of fittings in the valve hall is intricate, and the requirements for the structure of the fittings are particularly strict.

Considering that there are many ultra-high voltage and ultra-high voltage direct current transmission converter stations in my country's long-term planning, if the valve hall and direct current field fittings of each project are purchased from foreign parties, not only the cost is high, but also the construction period cannot be guaranteed. It is also not in line with the policy of localization of core technology that our country has been implementing. Therefore, we must adhere to the road of independent research and development, and realize the localization of fittings for ultra-high pressure and even ultra-high pressure valve halls.

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