A Method for Solving the Unbalanced Tension of Continuous Overhead Transmission Lines Under Single-ended Ice Covering

Abstract

The invention discloses a method for solving the unbalanced tension of a continuous overhead transmission line under single-end icing. Assuming a horizontal stress, the offset of the suspension insulator string is calculated by the step 1 to increase the span, and the step 2 is used to calculate each The offset of the suspension string of the gear, and then calculate the offset of the insulator string according to the stress of the overhead line in step 3, and repeat steps 1 to 3 to calculate all the parameters. If the calculated offset of the hanging string is close to 0, the requirements are met, and the above calculation results are accepted, otherwise, the horizontal stress is assumed again, and the calculation is restarted from step 1 until the calculated offset of the hanging string meets the accuracy requirements . The present invention proposes a calculation formula for the variation of the span of continuous stalls under single-end icing, and uses the "equal line method" model to solve the unbalanced tension after single-end icing, which can not only meet the requirements of engineering accuracy, but also form a simple and practical The calculation program is suitable for engineering actual calculation.

Description

technical field [0001] The invention belongs to the field of overhead power transmission lines, and in particular relates to a method for solving unbalanced tension of continuous overhead power transmission lines under single-end icing. Background technique [0002] my country is one of the countries with severe icing on transmission lines. After the power grid is strengthened, there are still icing tripping accidents. Through analysis, most of the fault flashover points are distributed at the exits of large spans, large height differences, and high suspension points, and The high hanging end is heavily iced, and the low hanging end is lightly or not covered with ice. In response to this situation, industry technicians proposed that under large spans and large height differences, it is necessary to verify whether the static approach distance when the high suspension end of the deicing ground wire is covered with ice meets the operating clearance. The key to the research on t...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for solving the unbalanced tension under single-end icing of continuous overhead transmission lines in order to solve the problem of complex and incomplete calculation of unbalanced tension under single-end icing in the prior art, It can not only meet the requirements of engineering precision, but also form a simple and practical calculation program, which is mastered by most engineering designers.

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