发明名称 |
Apparatus and system for locating thunderstruck point and faulty point of transmission line |
摘要 |
A plurality of current detectors are provided in a plurality of prescribed spots of a transmission line for locating a fault caused, e.g. by lightning. A plurality of discriminators are provided in correspondence to the plurality of current detectors. Each discriminator receives detected signals from an arbitrary pair of the plurality of current detectors for detecting a relative difference between arrival times of the detected signals while extracting low-frequency components from the detected signals respectively and for detecting a phase difference between the extracted low-frequency components. A locator receives relative time difference data and phase difference data from the plurality of discriminators, to locate a faulty point in the transmission line on the basis of the received data.
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申请公布号 |
US5138265(A) |
申请公布日期 |
1992.08.11 |
申请号 |
US19890444620 |
申请日期 |
1989.11.29 |
申请人 |
SUMITOMO ELECTRIC INDUSTRIES, LTD. |
发明人 |
KAWAMURA, TAKESHI;ITAKA, KOSHI |
分类号 |
G01K11/12;G01R31/08 |
主分类号 |
G01K11/12 |
代理机构 |
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