Method for generating failure travelling wave simulation signals

Abstract

The invention discloses a method for generating failure travelling wave simulation signals and belongs to the technical field of power transmission detection. The method comprises the following steps: receiving and analyzing a waveform data downloading command and downloading waveform data into corresponding memory units by a main control unit, and respectively reading the waveform data from the memory units and outputting the data of the memory units to a digital-to-analog conversion unit through an auxiliary control unit; providing a playback address for the memory units and providing a playback clock for the digital-to-analog conversion unit through the auxiliary control unit; converting the quantity of the waveform data output by the memory units to an analog quantity by the digital-to-analog conversion unit; converting the analog quantity output by the digital-to-analog conversion unit to high-frequency current and outputting the high-frequency current by a current modular unit; inputting clock pulses into the main control unit by a global positioning system module. The method can solve the problems that true and effective failure travelling wave signals are difficult to obtain, the output travelling wave signals easily distort, and travelling wave signal sources are difficult to be synchronously triggered during double-terminal location.

Description

technical field [0001] The invention relates to the technical field of electric power transmission detection, in particular to a method for generating fault traveling wave simulation signals. Background technique [0002] In the power system, due to the long transmission line and the uncertainty of the fault point, the distance measurement of the fault point of the transmission line becomes particularly important. Accurate fault location can reduce the scope of line inspection, reduce power outage time, and improve line power supply reliability. After a fault occurs on a transmission line, under the action of an additional power source at the fault point, traveling waves of voltage and current that travel close to the speed of light will be generated on the line. Using traveling waves to measure the distance to the fault point is an effective method for fault detection of transmission lines. A double-terminal ranging method for transmission line faults, using current trave...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for generating a fault traveling wave simulation signal, which can solve the problem that it is difficult to obtain a true and effective fault traveling wave signal, the output traveling wave signal is easily distorted and The problem that the source traveling wave signal is difficult to trigger accurately and synchronously during double-ended ranging

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