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Electric transmission line straight line angle tower lightning protection measure collocation method

A technology for straight-line corner towers and transmission lines, applied in the installation of electrical components, cables, installation of lighting conductors, etc., can solve the problems such as the lack of careful consideration of the protection range of lightning protection measures due to differences in the structure of towers, so as to reduce the difficulty of lightning protection construction and save money. cost, the effect of reducing the trip rate of lightning strikes

Inactive Publication Date: 2014-06-25
STATE GRID CORP OF CHINA +3
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Problems solved by technology

The differentiated lightning protection technology also lists the towers that need lightning protection transformation and the principles of the transformation plan, without careful consideration of the structure differences of towers and the protection range of lightning protection measures

Method used

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  • Electric transmission line straight line angle tower lightning protection measure collocation method
  • Electric transmission line straight line angle tower lightning protection measure collocation method
  • Electric transmission line straight line angle tower lightning protection measure collocation method

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Embodiment Construction

[0026] Next, taking a certain 500kV double-circuit transmission line on the same tower (hereinafter referred to as line K) as an example, the embodiments of the present invention will be further described in conjunction with the accompanying drawings.

[0027] refer to figure 1 , figure 1 The present invention configures the lightning protection measures of the straight corner tower based on the lightning strike risk assessment results of the transmission line, and the specific configuration method is as follows.

[0028] (1) Obtain the results of lightning strike risk assessment

[0029] Through the transmission line lightning risk assessment system, the shielding, counterattack and total lightning tripping rate of base towers are obtained, such as figure 2 ;According to the line historical lightning trip data and transmission line operation specifications, the lightning flashover risk classification index is obtained, as shown in Table 1. Among them, Pr, Pf and P represe...

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Abstract

The invention discloses an electric transmission line straight line angle tower lightning protection measure collocation method. The method comprises the steps that a line by-base tower is evaluated, and risk grades are divided; lightning protection modification m subgoals and weight coefficients of the subgoals are determined, and a goal weight column vector W is obtained; whether the tower lightning trip-out rate meets operating indexes or not is judged, and k alternative lightning protection measures are selected from common lightning protection measures; according to lightning protection modification actual investigation goals, the goal effect row vectors of the alternative lightning protection measures on the subgoals are determined one by one, k row vectors are combined to form a goal effect matrix F with dimensionality being k*m, and effect vectors of the alternative measures are obtained through calculation; the expected lightning trip-out rate after governance is calculated, and the lightning protection measure collocation process is conducted in an iteration mode. The electric transmission line straight line angle tower lightning protection measure collocation method is implemented based on lightning stroke risk evaluation results and combined with the lightning protection modification goals, optimizes lightning protection collocation, reduces the lightning trip-out rate, reduces the lightning protection engineering cost, lowers lightning protection construction difficulty and improves technology economy of the comprehensive lightning protection measures.

Description

technical field [0001] The invention relates to the field of lightning protection for power transmission lines, and in particular provides guidance for the selection and installation of lightning protection measures for straight-line corner towers, which is suitable for the configuration of lightning protection measures for ultra-high voltage overhead transmission lines in power systems, and improves the technical economy of lightning protection measures. Background technique [0002] China's existing power grid lightning protection system is mainly composed of the external defense of transmission lines and the core defense of substations. According to the statistics of the transmission line operation and maintenance department, because the transmission line is located in the wilderness and the transmission distance is long, it is most vulnerable to the threat of lightning strikes. Although the operation and maintenance unit has adopted a variety of lightning protection tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02G13/00
Inventor 路永玲马勇刘洋周志成高嵩陈杰陈光赵淳苏杰雷梦飞
Owner STATE GRID CORP OF CHINA
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