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No-lightning-conductor power transmission line design method for heavily icing region

A technology of transmission lines and design methods, applied in the direction of overhead lines/cable equipment, etc., can solve the problems of increased line cost, decreased lightning protection performance of lightning protection lines, and increased construction difficulty, so as to save costs, improve ice disaster and lightning resistance Harmability, easy construction and installation effect

Active Publication Date: 2016-11-09
STATE GRID HUNAN ELECTRIC POWER +2
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] There are relevant literatures that propose a way to let the lightning protection line run with insulators; however, in this case, the lightning protection performance of the lightning protection line will be greatly reduced, the cost of the line will increase accordingly, and the construction difficulty will increase significantly

Method used

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  • No-lightning-conductor power transmission line design method for heavily icing region
  • No-lightning-conductor power transmission line design method for heavily icing region

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Embodiment Construction

[0026] Such as figure 1 Shown is the flow chart of the method of the present invention: the design method of the power transmission line without lightning protection line in this overlapping ice area provided by the present invention includes the following steps:

[0027] S1. Reconstruction of towers and lightning protection lines in heavy ice-covered areas, specifically including removing lightning protection lines and steel frame structures above cross-arms of conductor insulators on the basis of existing towers; for lines under construction, Under the condition of lightning protection line, the line design should be carried out according to the design standard; the design standard can refer to GB 50545-2010 "Code for Design of 110kV~750kV Overhead Transmission Line";

[0028] S2. Obtain electrical parameters, line icing parameters and historical data, line area lightning parameters and historical data of the transmission line after transformation in step S1; specifically in...

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Abstract

The invention discloses a no-lightning-conductor power transmission line design method for a heavily icing region, and the method comprises the steps: reconstructing a pole and a lightning conductor; obtaining the parameters and historical data of a reconstructed line; replacing a common insulator of the reconstructed line with an icing flashover resistant composite insulator with an anti-thunder function; carrying out the simulation analysis of the icing flashover resistant composite insulator with the anti-thunder function, and determining an external structure of the icing flashover resistant composite insulator and the parameters of a zinc oxide valve block of the insulator; carrying out testing; and completing the no-lightning-conductor power transmission line design for the heavily icing region. The method prevents the breakage of an icing lightning conductor from causing a line outage accident, greatly reduces the construction cost of a power transmission line, and facilitates the construction and installation of a line and a pole. The icing flashover resistant composite insulator with the anti-thunder function is employed in the method, and the insulator can be resistant to thunder and icing flashover, thereby improving the capability of resisting ice disasters and thunder disasters of the power transmission line, and guaranteeing the stable operation of the line. Moreover, the installation is simple and convenient, and the original structure of the pole does not need to be changed, thereby saving the cost in equipment selection and power grid construction.

Description

technical field [0001] The invention specifically relates to a method for designing a power transmission line without a lightning protection line in a region covered with ice. Background technique [0002] With the development of economy and technology and the improvement of people's living standards, electric energy has become an indispensable secondary energy source in people's production and life. Therefore, the safe and stable operation of the power system has become the top priority of my country's economic development. [0003] Affected by factors such as weather and topography in the south, transmission lines are prone to icing. There are insulators between the line wire and the ground, and the ice can be melted by increasing the current after a power outage; while the lightning protection line is directly connected to the tower and has no operating current. At present, manual deicing is mostly used, and there is no effective ice melting method. Due to the thermal e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G1/02
CPCH02G1/02
Inventor 陆佳政王博闻方针胡建平吴伟蒋正龙徐勋建
Owner STATE GRID HUNAN ELECTRIC POWER
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