technology for electrified overhaul of +-500kV double-circuit direct-current power transmission lines on same tower
A DC transmission line, live maintenance technology, applied in the direction of overhead lines/cable equipment, etc., can solve the problem of not being able to meet the needs of ±500kV dual-circuit DC line maintenance on the same tower
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[0021] In order to better understand the present invention, the invention will be described in detail below in conjunction with the accompanying drawings and specific examples.
[0022] Before the technical scheme of the present invention is introduced in detail, at first the theoretical basis of the project research is briefly stated:
[0023] (1) According to the ±500kV DC double-circuit line on the same tower provided by Zhongnan Electric Power Design Institute and other design units, the tower structure, insulator string type, fitting connection form, ground wire layout, line mechanical load level and air gap form;
[0024] (2) Based on the analysis and calculation of the overvoltage level of the ±500kV double-circuit DC transmission line on the same tower by the State Grid Electric Power Research Institute and the research on the live working gap test of the ±500kV double-circuit DC line on the same tower, the proposed ultra-high voltage double-circuit on the same tower T...
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