Method for identifying lightning stroke fault and non-lightning stroke fault of transmission line
A lightning strike fault and transmission line technology, applied in the fault location, measuring electrical variables, measuring current/voltage, etc., can solve the problems of line load current, line length and transition resistance, which are not easy to implement, and affect the reliability of transmission lines. , to achieve the effect of simple and easy-to-implement waveform analysis and judgment process
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[0019] see figure 1 , figure 1 It is a flow chart of steps in an embodiment of a method for distinguishing lightning strike faults and non-lightning strike faults of transmission lines based on high-frequency traveling wave currents in the present invention.
[0020] The identification method includes the following steps:
[0021] S-1, Real-time sampling and recording: install high-speed acquisition equipment to conduct real-time sampling and recording of the three-phase transient current on the transmission line;
[0022] In this step, a high-speed sampling device with a sampling frequency of 10 MHz is used to sample and record the current on the transmission line in real time to obtain the three-phase transient current of the transmission line.
[0023] S-2, judge the fault phase;
[0024] In this step, compare the maximum magnitude of the three-phase transient current recorded at the same observation point ,and , the one with the largest amplitude is the fault phase;...
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