| Summary: | 碩士 === 國立高雄應用科技大學 === 電機工程系 === 97 === 69kV transmission line due to lightning and line voltage dip caused by the accident beyond. To reduce the occurrence of mine-affected, although Taipower positive measures to improve the implementation of mine hard to achieve a reasonable improvement targets. From 1993 to 2007 to choose off mine, high-density wiring eight regional ground-coupled, after 14 years at the scene to assess the effectiveness of anti-lightning. By statistical coupling in the ground not to install a total of 91 times before the lightning strike accident, after the installation of ground-coupled to 20 times, reduce accidents is about 82% of lightning strikes. Apparent coupling ground mining methods can also be installed to improve the level of mine-resistant, and less investment costs, the effect of good results from the actual installation. Studies in this paper refer to IEEE std. 1243-1997 of the framework to Taipower 69kV to Pingtung Dapeng # 44 to # 50 tower tower of the second interval to the target line. Tower for a total of two of the tower height, type, span and earth guide specifications, as well as the source of lightning surge, the system power supply, tower, transmission lines, such as the establishment of ground-coupled transient model. Through the ATP-EMTP simulation results and the actual installation of mutual authentication in order to explore the installation of the coupling to the line with model number and the effectiveness of lightning protection measures. The results obtained can be used as Taipower to strengthen the economic point of view to assess the effectiveness of lightning protection measures of reference, and improving the quality of electricity supply, as well as the development of China's industries have a lot of help.
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