| The development and general situation of the research in this field in China and in other countries is introduced in this paper. All the existing algorithms can be classified into 4 main methods those are traveling wave location, impedance location, fault analysis location and Intelligence location. Then the principle and application condition of each algorithm are presented and discussed. Based on the analysis and comparison of each algorithm, the corresponding merits and application limitation are concluded.In this article, a new design scheme of the fault locator for HV transmission lines is presented. By using high-speed data acquisitioning unit designed specially to capture traveling waves of transient current, using Global Positioning System (GPS) to supply high precise time tagging for both ends and using wavelet transform theories to identify the head of the traveling waves, the fault locator can realize high precise double-ended traveling waves location. At the same time, using two-terminal voltages and currents sampled by the medium-speed sampling and processing unit synchronized by the Pulse Per Second (1PPS) of GPS, can realize. accurate double ended steady state location.The digital signal process technology is applied in the project. It is a new technique that develops rapidly and be used widely. The TMS320C5410 data signal processor of TI Company is used to meet with the demands of digital processing. Effective and ordered control on every module can be implemented by the choosing logic selection of a programmable chip. If the transmission line occurs the fault, the fault locator starts system, measures the fault point location and transmits the acquired fault point data to PC by RS-232 serial port.In order to verifying the feasibility of the fault location method, which is presented in this thesis, the experiment is performed based on the locale condition. The result shows that the experimental scheme of this thesis is feasible. |
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