Characteristics analysis on lightning waveforms at 115 MHz frequency band

被引：0

作者：

Du, Haiming ^{[1
]}

Ma, Hong ^{[1
]}

Su, Hongchao ^{[1
]}

Tan, Ping ^{[1
]}

机构：

[1] Wuhan National Laboratory for Optoelectoincs, Huazhong University of Science and Technology, Wuhan 430074, Hubei Province, China

来源：

Dianwang Jishu/Power System Technology | 2010年 / 34卷 / 10期

关键词：

Electromagnetic radiation signals - High detection probability - Lightning location systems - Short-time energy - Statistical characterization - Storage systems - Time domain characteristics - Very high frequency;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

In cloud-lightning location system it is of crucial importance to design a lightning detection algorithm with high detection probability and low false alarm rate according to time-domain characteristics of lightning signals. A lightning signal acquisition and real-time streaming storage system operating at very high frequency (VHF) frequency with an 115 MHz center frequency and a 10 MHz bandwidth is developed, and by use of short-time energy method the statistical analysis on lots of acquired real-time data is performed, thus the time-domain distribution law of electromagnetic radiation signals in VHF frequency band from the beginning to the end of the whole lightning discharge process is preliminarily obtained. Taking the duration of lightning pulse, interval between lightning pulses and the magnitude of short-time energy as statistical characterization, lightning signals can be divided into single-peak energy pulse and the multi-peak energy pulse cluster. Above-mentioned conclusion is available for reference in the determination of the detection threshold, the data cache depth and the throughput rate of lightning signals of real-time lightning signal processing system.

引用

页码：60 / 64