Circuit interphase fault single-terminal location method capable of preventing additional fault location influence
A technology of additional fault distance and phase-to-phase fault, applied in the fault location and other directions, can solve the problems that the measurement results deviate from the real fault distance, the sampling rate is very high, and the ranging accuracy is affected. It achieves easy program implementation, simple ranging principle, real-time effects
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[0015] The technical solution of the present invention will be further described in detail according to the accompanying drawings.
[0016] figure 1 It is a schematic diagram of the line transmission system applying the present invention. figure 1 Among them, PT is a voltage transformer, and CT is a current transformer. The protection device includes a data acquisition system and a data processing system. The data acquisition system samples the voltage waveform of the voltage transformer PT and the current waveform of the current transformer CT at the transmission line protection installation to obtain the instantaneous value of voltage and current, and samples it The obtained instantaneous values of voltage and current use Fourier algorithm to calculate the fault phase-to-phase voltage at the installation place of transmission line protection , fault current between phases and negative sequence current between fault phases ; Among them, φφ=AB, BC, CA phase.
[0017]...
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