Improved method for calculating lightning trip-out rate of distribution line
A technology of power distribution lines and calculation methods, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as inaccurate calculations
Inactive Publication Date: 2016-01-13
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology
The calculation of the trip rate of this method is still in accordance with the original regulations, and it is also impossible to calculate accurately
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[0061] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.
[0062] The calculation method of the improved distribution line lightning tripping rate of the present embodiment includes the following steps:
[0063] (1) Number each base tower of the entire power distribution line, respectively 1, 2, ..., n. Obtain the latitude and longitude coordinates of each base tower through the GIS system, and then use the lightning positioning system to count the number of lightning strikes within the line corridor of each tower, and then conv...
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The invention proposes an improved method for calculating the lightning trip-out rate of a distribution line, and the method comprises the following steps: (1) obtaining the longitude and latitude coordinates of each base pole tower, counting the number of lightning times in a line corridor range of each base pole tower, and converting the density of lightning in the line corridor range of each base pole tower into a line direct lightning density; (2) collecting the basic parameter configuration of a line; (3) carrying out the fitting of a lightning current cumulative probability distribution formula and a probability density formula according to lightning current data in the line corridor range, and carrying out fitting to obtain alpha and beta through combining a line corridor lightning data of a lightning positioning system; (4) calculating the direct lightning trip-out rate of each base pole tower; (5) calculating the induced lightning trip-out rate of each base pole tower through a section combination statistical method; (6) calculating the lightning trip-out rate of the whole line, and analyzing the lightning disaster condition of the line. The invention has the beneficial effects that the method can obtain accurate lightning trip-out rate of a power distribution network, provides accurate data for the estimation of the lightning protection performance, and improves the effectiveness and scientificity of lightning protection measures.
Description
technical field [0001] The invention belongs to the field of lightning protection for power systems, and relates to the precise path of transmission line corridors based on lightning positioning data and GIS, and more specifically, relates to a calculation method for improving the lightning tripping rate of power distribution lines. Background technique [0002] As an important part of the power distribution system, the power distribution line undertakes the important task of distributing electric energy to the load, and its safe and stable operation is very important. Due to the low insulation level of distribution lines and weak protection against lightning, tripping accidents caused by lightning strikes account for a large proportion of distribution network faults. Both direct lightning strikes and induced lightning strikes may cause insulator flashovers and cause line trips. Some lightning flashover trips have no obvious traces afterwards, and it is difficult to confirm...
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IPC IPC(8): G01R31/00
Inventor 杨仲江刘健卢慧慧肖扬
Owner NANJING UNIV OF INFORMATION SCI & TECH