Method and device for evaluating induction lightning protection range of low-voltage distribution line arrester
A line arrester and protection range technology, which is applied in the field of risk assessment of the induction lightning protection range of low-voltage distribution line arresters, can solve the problem of the reduction of the tripping rate of line induction lightning strikes, etc.
Inactive Publication Date: 2012-09-19
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID +1
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Therefore, as long as the installation density of lightning arresters for low-voltage distribution lines is appropriate, the tripping rate of line-induced lightning strikes will be greatly reduced.
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[0019] The method and device for evaluating the induction lightning protection range of the lightning arrester for low-voltage distribution lines of the present invention obtain the protection range of the lightning arrester through a specific calculation method, thereby providing data support for the installation of the lightning arrester. The present invention will be explained in detail below by taking a 10kV power distribution line as an example and in conjunction with the accompanying drawings.
[0020] Providing lightning current discharge channels in time on the conductors near the lightning strike point plays an important role in reducing the induced lightning overvoltage and preventing the insulator string from flashover and tripping. figure 1 Shown is a schematic diagram of the action point of the arrester, O in the figure is the lightning strike point, O 1 It is the coordinate point of the tower and the horizontal distance from the lightning strike point is the clos...
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The invention discloses a method for evaluating risk of an induction lightning protection range of a low-voltage distribution line arrester. The method comprises the following steps of: acquiring related parameters of a low-voltage distribution line, substituting the acquired parameters into a specific formula, calculating a farthest mounting distance of the arrester capable of preventing the line from being subjected to induction lightning, and mounting the arrester within the farthest mounting distance, so that the low-voltage distribution line can be protected; and therefore, reference is provided for an arrester arrangement scheme of the low-voltage distribution line. By the evaluation method, the data required to be acquired is easily obtained, and complex operation is not involved in the whole process. The invention also discloses a device for evaluating the induction lightning protection range of the low-voltage distribution line arrester which corresponds to the evaluation method. The evaluation method and the evaluation device are combined, so that an aim of evaluating the protection range can be fulfilled.
Description
technical field [0001] The invention relates to the technical field of lightning protection for distribution lines, in particular to a method and device for assessing the risk of an induced lightning protection range of an arrester for a low-voltage distribution line. Background technique [0002] The lightning protection measures for low-voltage distribution lines mainly include: installation of lightning arresters, protection gaps, reinforced insulation, and erection of lightning protection lines. Due to the constraints of cost and feasibility factors, strengthening insulation and erecting lightning protection lines cannot achieve a good lightning protection effect on low-voltage distribution lines. The lightning arrester can discharge the lightning current and shut off the power frequency continuous current in time, which is an effective means to reduce the lightning tripping rate of the line, thereby improving the reliability of the system. Judging from the operation of...
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IPC IPC(8): G01R31/00
Inventor 邹俊英林伟坚唐军刘刚李恒真席宇刘晓庭吴裕生许海林高伟峰
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID