Direct current deicing device for ultra high voltage transmission line

Abstract

The invention discloses a direct current deicing device for an ultra high voltage transmission line. The device consists of a first 24-pulse rectifying transformer (1), a second 24-pulse rectifying transformer (4), a first 12-pulse rectifier (2), a second 12-pulse rectifier (3), a third 12-pulse rectifier (5) and a fourth 12-pulse rectifier (6), wherein the first and second 12-pulse rectifiers (2 and 3) are connected in parallel with the first 24-pulse rectifying transformer (1) respectively; the third and fourth 12-pulse rectifier (5 and 6) are connected in parallel with the second 24-pulse rectifying transformer (4) respectively; the first 12-pulse rectifier (2) has a positive electrode A and a negative electrode B; the second 12-pulse rectifier (3) has a positive electrode C and a negative electrode D; the third 12-pulse rectifier (5) has a positive electrode E and a negative electrode F; and the fourth 12-pulse rectifier (6) has a positive electrode G and a negative electrode H. The device is wide in application range, high in cost performance, time-saving and labor-saving in operation, simple in maintenance, low in reactive power consumption and high in power factor.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and in particular relates to a DC deicing device for UHV transmission lines. Background technique [0002] my country is one of the countries that are seriously affected by ice-covered disasters in the world. Ice disasters occur frequently in southern regions such as Guizhou, Hunan, Hubei, and Jiangxi. According to predictions, the southern region of my country has entered a period of 15 to 20 years of frequent occurrence of icing. And every ice disaster, the loss of transmission lines is particularly heavy. For example, in early 2008, the collapse of transmission lines in the southern region alone caused direct economic losses of tens of billions of yuan for power grid companies. [0003] According to the State Grid Corporation's "Twelfth Five-Year Plan", more UHV AC and DC transmission lines will be put into operation in my country soon. If anti-icing measures are adopted to in...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a DC deicing device for UHV transmission lines to meet the deicing requirements of UHV and below lines in view of the defect that the existing technology cannot satisfy the deicing of UHV transmission lines. Low investment, simple operation and maintenance

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