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利用雷电定位系统进行电网雷击故障快速查询(英文) 总被引：1，自引：0，他引：1
At present, lightning is one of the 10 natural disasters, and it is also the top environmental factor of power interruption. It often causes huge losses to the electric system. The Wuhan High Voltage Institute of the State Grid Corporation of China and Huazhong University of Science and Technology have been researching and developing lightning location systems （LLSs） since the late 1980s. In the mid-1990s, a lightning detection network was created in 29 provinces and cities in China. It is primarily applied to rapidly find lightning accidents, which greatly reduces power interruption. Also, it ensures high efficiency and safe operation of the electricity system. Remarkable benefit is achieved. China＇s LLS went through an ＂orientation positioning - time difference positioning - integrated positioning＂ development process. The positioning precision, detection efficiency, degree of automation, practicability and applied range are improved. Also, a lightning information system plan of the national network has been implemented, which services the whole society. 相似文献
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数字图像监测系统应用于高压导线覆冰试验(英文) 总被引：1，自引：0，他引：1
A real-time system of numeral image manipulation technology is employed to inspect the dynamic displacement of an engineering
structure. First, the CCD vidicon aims at the fixed point. The image of the fixed point on the structure is gathered by a
picture gathering card. By processing pictures with a self-programmed software, the real-time space coordinate of the calibration
device can be obtained. Finally, the data is dealt with to get the movement curve, and the dynamic displacement is carried
out. The system is applied to the test of a high voltage icing conductor. The result indicates that the dynamic data of the
ice shedding conductor includes jumping amplitude, displacement-time curve and attenuation process.
Supported by the National Natural Science Foundation of China (No.50778077, No.50608036). 相似文献
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Based on digital image processing technique, a real-time system is developed to monitor and detect the dynamic displacement of engineering structures. By processing pictures with a self-programmed software, the real-time coordinate of an object in a certain coordinate system can be obtained, and further dynamic displacement data and curve of the object can also be achieved. That is, automatic gathering and real-time processing of data can be carried out by this system simultaneously. For this system, first, an untouched monitoring technique is adopted, which can monitor or detect objects several to hundreds of meters apart; second, it has flexible installation condition and good monitoring precision of sub-millimeter degree; third, it is fit for dynamic, quasi-dynamic and static monitoring of large engineering structures. Through several tests and applications in large bridges, good reliability and dominance of the system is proved. 相似文献
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