Transient process detection method, apparatus and system for railway power system

Abstract

The invention provides a transient process detection method, apparatus and system for a railway power system. The method comprises the steps of sampling a current waveform in a recent preset time period, and calculating an intensity change quantity of a current; if the intensity change quantity is greater than a first preset threshold, judging that a transient process of the current waveform begins, separately recording a transient waveform, and triggering a transient completion judgment algorithm; starting to calculate the intensity change quantity of the current by the transient completion judgment algorithm, and if the intensity change quantity in a preset number of continuous cycles is smaller than a second preset threshold, judging that the transient process is ended, and stopping recording the transient waveform separately; and outputting the recorded transient waveform. The technical problem that the anti-interference capability of singular points is poor, namely, the singular points, spikes or glitches and the like of the waveform are easily mistaken for the transient process in the prior art is solved.

Description

Technical field [0001] The invention relates to the field of electric power, and in particular to a method, device and system for detecting a transient process of a railway electric power system. Background technique [0002] The shock transient state of freight railway power system is the transition process of the system from one steady state to another steady state. There are many reasons for the transient process, mainly including moving load passing, failure, load switching, and change of operating state. The detection of transient process means that when a transient process occurs in the system, it can detect the occurrence of the transient process and record the transient waveform; [0003] At present, the commonly used transient process detection methods include edge detection and sliding window detection. The existing detection methods are not strong against singular points, that is, it is easy to misjudge the singular points and spikes of the waveform as transient process...

AI Technical Summary

Problems solved by technology

[0005] Based on the above problems, the present invention proposes a transient process detection method, device and system of a railway power system, which solves the problem that the anti-interference ability of the singular point in the prior art is not strong, that is, the singular point of the waveform, the peak glitch, etc. Misjudged as a technical problem of a transient process

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