Method for evaluating direct lightning strike protection effect of lightning arrester spacer configuration for overhead line
A technology for overhead lines and lightning arresters, which is applied in the field of direct lightning protection effect evaluation of overhead line lightning arrester configurations. It can solve the problems of difficult program execution of simulation and lightning resistance level errors, and achieve convenient program design, avoid calculation errors, and achieve better results. good effect
Active Publication Date: 2019-10-18
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
[0004] The embodiment of the present application provides a method for evaluating the protection effect of direct lightning strikes with an overhead line lightning arrester separated base configuration, in order to solve the problem that the simulation in the prior art is difficult to programmatically execute, and that only a certain point in the span can be used as the lightning strike point to calculate the lightning resistance level. Technical problems with large errors
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[0059] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0060] This application designs a method for evaluating the protection effect of direct lightning strikes with the configuration of overhead line arresters separated from the base. For ease of understanding, please refer to figure 1 , which specifically include:
[0061] 101. Classify the location of the lightning strike point into lightning strike conductors, lig...
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The embodiment of the invention discloses a method for evaluating a direct lightning strike protection effect of lightning arrester spacer configuration for an overhead line. The method comprises thesteps of classifying lightning strike conditions into a lightning strike on a wire, a lightning strike on one tower free of protection of a lightning arrester and a lightning strike on one tower underthe protection of the lightning arrester; building a lightning strike rate calculation model for the distance from a lightning strike point to the tower on which the lightning arrester is arranged; calculating line lightning withstand levels, probabilities of exceeding the line lightning withstand levels, lightning strike tripping rates and lightning strike tripping times of the lightning strikeon the wire, the lightning strike on the tower free of the protection of the lightning arrester and the lightning strike on the tower under the protection of the lightning arrester in sequence according to the lightning strike rate calculation model, wherein the lightning strike tripping times are obtained through a span integral calculation model; and finally obtaining the sum of the lightning strike tripping times of the lightning strike on the wire, the lightning strike on the tower free of the protection of the lightning arrester and the lightning strike on the tower under the protection of the lightning arrester. The method can be programmatically implemented and is convenient and fast, and the evaluation result is small in error.
Description
technical field [0001] The present application relates to the technical field of protection against direct lightning strikes for overhead lines, and in particular to a method for evaluating the protection effect of direct lightning strikes with lightning arresters for overhead lines separated from bases. Background technique [0002] Lightning is a serious natural disaster. Lightning directly hitting overhead lines will cause insulators to flashover under the action of lightning current, which will cause grounding short-circuit faults and seriously endanger the safe operation of power systems. In order to prevent lightning flashover on overhead lines, lightning arresters are usually installed at both ends of insulators; and in order to save line construction costs, the method of configuring lightning arresters separated from the base is often used to protect overhead lines. [0003] At present, it is difficult to calculate the tripping rate of direct lightning strikes for ov...
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Login to view more IPC IPC(8): G01R19/17
CPCG01R19/17
Inventor 汪进锋金杨刘致君
Owner GUANGDONG POWER GRID CO LTD
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