Analysis and Check of ThreeDimensional CloudtoGround Lightning Monitoring Data
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Abstract:
A comparative analysis is made of the spatial and temporal distribution characteristics of the cloudtoground (CG) lightning data of Fujian Province in 2015 by means of the threedimensional monitoring and ADTD data for the same period. Using the peak values of lightning current, the detection efficiency and location error check in these two systems are conducted, and at the same time, the cumulative probability distribution of lightning current is analyzed in combination with the probability formula of the IEEE standards and the power industry standards. The results show that the distributions of CG lightning density from two lightning location systems are consistent in Fujian. The distribution of CG lightning density from ADTD is higher than that of the threedimensional system in the southwestern Sanming and some areas of Fuzhou. The monthly and hourly changes of CG lightning frequency are the singlepeak type. The frequency of CG lightning strokes from the threedimensional monitoring system is less than that from ADTD from 09:00 to 12:00 in diurnal variation, and from October to December in annual variation. The detection efficiency of the threedimensional monitoring system is 40%, and the average location error of 275 km is estimated. In the range of 0 to 50 kA, compared with the negative cloudtoground lightning, the current amplitudes of positive cloudtoground lightning from the threedimensional monitoring system are distributed more concentrically, and in the range of 26 to 84 kA, the amplitudes of lightning current are higher than the recommended values of IEEE and the related electricity regulations.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.