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Algorithm for maximum jump height of deicing of single-span iced power transmission line

A transmission line, jump height technology, applied in computing, electrical digital data processing, instruments, etc., can solve the problems of error, difficult application, lack of theoretical support, etc.

Active Publication Date: 2019-06-07
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

However, the derivation process assumes that the ice-coated wire is in the shape of a parabola, which will lead to a large error in the state of large deformation
Moreover, the derived theory contains tension variables of different states, which are unknown in actual engineering and are difficult to apply
In addition, some literatures give an approximate fitting formula for the deicing jump height, but there is no theoretical support

Method used

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  • Algorithm for maximum jump height of deicing of single-span iced power transmission line
  • Algorithm for maximum jump height of deicing of single-span iced power transmission line
  • Algorithm for maximum jump height of deicing of single-span iced power transmission line

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Embodiment Construction

[0072] An algorithm for deicing the maximum jump height of a single-span ice-coated transmission line, including:

[0073] 1 De-icing analysis status of iced transmission lines

[0074] The deicing state of transmission lines can be divided into four types, see Figure 1a-Figure 1d ,

[0075] State I: The transmission line is not covered with ice. Under the action of gravity, the transmission line is in a catenary relationship.

[0076] By solving the boundary of the catenary equation, it can be obtained that the catenary equation of the overhead line of the equal-height suspension point is:

[0077]

[0078] In the formula, z is the vertical coordinate of the catenary, x is the horizontal coordinate, ch is the hyperbolic cosine function, m is the mass per unit length of the transmission line, g is the gravitational acceleration, σ 0 is the initial stress;

[0079] State II: The state after the transmission line is covered with ice. Under the action of gravity, the tra...

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Abstract

The invention discloses an algorithm for the maximum jump height of deicing of a single-span iced power transmission line. According to the patent application, a single-span power transmission line deicing theory analysis simplified model is established, the deicing load of the power transmission line is regarded as a sudden dynamic load, and based on the cable structure theory and the energy method, the maximum jump height calculation simplified method of the single-span ice-coated power transmission line is provided for design and ice-resistant reinforcement reference. The method comprises the following steps: S1, analyzing the deicing state of an iced power transmission line; s2, establishing a dynamic tension and maximum jump height relation model; and S3, solving based on an energy principle.

Description

technical field [0001] The invention relates to the technical field of power transmission lines, in particular to an algorithm for deicing the maximum jump height of a single-span ice-coated power transmission line. Background technique [0002] The existing algorithm regards the de-icing load of the transmission line as a sudden dynamic load, considers the attenuation effect of damping, and derives the theoretical calculation formula of the jumping height of the conductor based on the functional principle and the law of energy conservation. However, the derivation process assumes that the ice-coated wire is in the shape of a parabola, which will lead to large errors in the state of large deformation. Moreover, the deduced theory contains tension variables in different states, which are unknown in actual engineering and are difficult to apply. In addition, some literatures give an approximate fitting formula for the deicing jump height, but lack of theoretical support. Co...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 晏致涛李孟珠刘欣鹏李妍孙毅
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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