Measured lightning data-based transmission line failure probability evaluation method

A technology of transmission lines and actual measurement data, which is applied in the direction of fault location, measuring electricity, measuring devices, etc., can solve the problems of fixed fault sets and unrecognizable fault lines, etc., to improve the ability to defend against lightning disasters and high reliability , The effect of convenient information collection

Active Publication Date: 2012-07-18
NARI TECH CO LTD +1
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  • Description
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  • Application Information

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Problems solved by technology

However, this system is aimed at general sequential faults, and its fault set is fixed, so it cannot dynamically identify possible faulty lines as the natural environment changes.

Method used

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  • Measured lightning data-based transmission line failure probability evaluation method
  • Measured lightning data-based transmission line failure probability evaluation method
  • Measured lightning data-based transmission line failure probability evaluation method

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Experimental program
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Embodiment Construction

[0014] Below in conjunction with accompanying drawing 1, the method of the present invention is described in detail.

[0015] Step 1 in Figure 1 realizes that the control center summarizes the lightning measured data (including time, longitude and latitude) within the specified time range according to the unified time scale, and the grid points of the geographical range studied (by default, the side length is 9km grid), divide it into grid points of equal area, and the size of the grid points is adjustable.

[0016] Step 2 in Figure 1 realizes the identification of lightning occurrence range. For a given time period, first count the number of lightning strikes on each grid point, set the distance thresholds to 1, 2, ..., 5 grid point side lengths, and make the longitude difference and latitude difference less than or equal to the threshold The grid points of are grouped into the same group, and the group whose number of lightning strikes is less than a certain value is elimin...

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Abstract

The invention discloses a measured lightning data-based transmission line failure probability evaluation method, and belongs to the technical field of power systems and automation thereof. The method comprises the following two steps of: (1) identifying a lightning occurrence range within a certain time period according to the measured lightning data of lightning occurrence time, occurrence positions, strength and the like which are measured, and predicting a lightning occurrence region in the next time step length and credibility thereof; and (2) calculating the lightning failure probability of each line by using a lightning failure probability formula according to real-time parameters of a line length in the predicted lightning occurrence region, the area of the predicted lighting occurrence region, thunderbolt density and the like. By the method, the line failure probability can be dynamically and adaptively evaluated according to changes in external weather conditions, so that the risks of lightning disasters can be early warned for the system; and the method is combined with a wide-area measurement analysis protection control system, so that the capability of the power system in withstanding the lightning disasters can be improved.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof. More precisely, the invention relates to a method for evaluating the probability of a lightning strike failure of a power transmission line. Background technique [0002] China's economic development and energy distribution are uneven, and the electricity from the central and western regions needs to be transmitted over long distances to reach the eastern coastal areas where there is a large demand for electricity. The increase of power transmission distance in power transmission has greatly challenged the safety and stability of the power system. In order to defend against accidental faults causing power system blackouts, academician Xue Yusheng proposed a space-time coordinated blackout defense framework and developed a wide-area monitoring analysis protection control system (WARMAP). However, this system is aimed at general sequential faults, and its faul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R31/08
Inventor 薛禹胜谢云云王昊昊薛峰李碧君徐泰山万芳茹汪马翔张劲中陈家宏王海涛金学成刘镭郭玉金姚诸香邹根华
Owner NARI TECH CO LTD
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