| Summary: | 碩士 === 臺灣大學 === 電機工程學研究所 === 98 === Because of the influence of compound and three-terminal power transmission lines in 161kV transmission line system of Taipower Company, the theme of this thesis aims at providing the following algorithms and methods in order to raise the accuracy of fault location.
By the combination of FIR window filter and discrete Fourier transform, we propose a new type of filtering algorithm in order to accurate estimated fundamental component of fault signals. We also propose a modified fault phase classification method and two different fault location algorithms to deal with two-terminal and three-terminal compound lines faults, respectively. Moreover, we introduce an unsynchronized angle correction method and a weighting correction method to enhance the performance of the proposed fault location algorithms.
All of the above research efforts have been implemented on a 161kV transmission line fault location platform. When a fault occurred in a 161kV transmission line system, maintenance engineers can easily input the fault record files into this platform to verify the waveform of fault signals, to check the parameters of transmission lines, and to execute the fault location program. The computational result of faults location would be shown by a diagram to help maintenance engineers figure out the fault location. This platform has been verified by not only simulator generated fault data but also field measurements to show the practicality of this platform.
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