A Method for Filling Missing Data Due to Lightning Strikes on Transmission Lines
A missing data, transmission line technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problem of inaccurate analysis of lightning strike faults of transmission line shielding lightning resistance performance, incorrect calculation of ground flash density, affecting transmission lines. Safe and reliable operation, etc.
Active Publication Date: 2018-08-24
SUZHOU POWER SUPPLY COMPANY OF STATE GRID ANHUI PROVINCE ELECTRIC POWER +1
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Problems solved by technology
The lack of lightning strike times will inevitably lead to incorrect calculation of ground flash density, which will lead to inaccurate evaluation of transmission line shielding lightning resistance performance and lightning fault analysis, which will affect the safe and reliable operation of transmission lines
Method used
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Embodiment Construction
[0025] The present invention will be further described below in conjunction with the accompanying drawings.
[0026] Such as figure 1 As shown in the present invention, a method for filling missing data due to lightning strikes on transmission lines comprises the following steps:
[0027] Step 1, determine the meteorological impact factor
[0028] Meteorological impact factor is a factor determined according to the influence of meteorological information on the number of lightning strikes. According to the statistical relationship between the weather conditions and the frequency and number of lightning strikes, the meteorological information is mapped to an integer set {1,2,...,m} in the number field, and the elements in this set are the values of the meteorological impact factors. The mapping relationship between the meteorological information and the meteorological impact factors established by the example of the present invention is shown in Table 1.
[0029] Table 1 M...
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The invention discloses a filling method for lightning stroke missing data of a transmission line. The filling method is used for solving the problem of lightning stroke frequency data missing of the transmission line. The method includes the steps that firstly, weather information is mapped on a number field, mapped numerical values serve as weather impact factors to be added into lightning stroke panorama data, a lightning stroke data set is divided into multiple data sub-sets through the weather impact factors, the mapping relation between the weather impact factors and the lighting stroke frequency is established, and the missing lightning stroke frequency data is estimated through the missing data filling method based on a regression equation according to the cross correlation and mean values of sub-set elements where the missing lighting stroke data is located. The estimated result error of the missing lightning stroke frequency data is small, the problem of lightning stroke frequency data missing is effectively solved, and the powerful data support is provided for lightning stroke fault analysis and lightning-shielding design of the transmission line.
Description
technical field [0001] The invention relates to a method for repairing transmission line data, in particular to a method for filling missing data due to lightning strikes on transmission lines, and belongs to the field of analysis methods for lightning strike faults on transmission lines. Background technique [0002] At present, lightning strikes are still the main hazard of transmission lines, and are the main cause of line tripping and blackout accidents. The lightning overvoltage wave formed by lightning strikes propagates along the lines and invades substations, which will also endanger the safe operation of substation equipment. In the UHV transmission line projects under construction in my country, shielding protection is taken as the main work of line lightning protection. Therefore, it is particularly important to accurately calculate and evaluate the shielding lightning resistance level and shielding trip rate of transmission lines to ensure the safe and stable ope...
Claims
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IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 夏华东李亚东别长报吴翔叶辉李德波于启万李庆兴郑浩廖志斌吴伟李强祝家大张大车邵雪敏
Owner SUZHOU POWER SUPPLY COMPANY OF STATE GRID ANHUI PROVINCE ELECTRIC POWER