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A Method of Fault Wave Recording

A technology of fault recording and frequency, which is applied in the field of power system, can solve the problems of complex threshold determination, inability to collect and store electrical quantity data, etc., and achieve the effects of easy analysis, ensuring density and accuracy, and power system optimization

Active Publication Date: 2018-06-01
BAODING YUXIN ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited to the large amount of collected data and hardware costs, fault recorders generally cannot collect and store electrical quantity data under normal conditions, but can only record various electrical quantity data in a short period of time before and after the threshold crossing time, but the threshold The determination itself is a very complicated problem. Sometimes even if the threshold does not exceed the limit, there is still a need to study the corresponding electrical quantity data. At this time, there is no data to study because no wave recording is performed.

Method used

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Embodiment Construction

[0011] The present invention will be further described below by specific embodiment:

[0012] The fault recording method includes the following steps: first, collect data with the first frequency f and store the collected data in the memory in a circular manner, and the storage time is the first time length t1; at the same time, the collected data is collected with the second frequency f / n Part of the data is cyclically stored in the hard disk, and n is a natural number greater than or equal to 2; when the threshold exceeds the limit, the memory data before the threshold is exceeded is stored in the hard disk, and at the same time, it is sampled at the first frequency f from the threshold. The first frequency f stores all the collected data into the hard disk for a second duration t2, and then repeats steps (a) and (b).

[0013] In specific practice, the first frequency f is generally 1~20kHz, such as 10kHz, n is generally greater than or equal to 2 and less than or equal to 2...

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Abstract

The present invention discloses a fault recording method. The method utilizes two different frequencies and combines a memory and hard disc recording mode to work, samples with the higher first frequency at work and stores in a memory instantly, at the same time, stores a part of data in a hard disc with the lower second frequency, and when a fault occurs, stores the memory data in the hard disc while samples with the higher frequency and also stores in the hard disc, so that the data denseness and accuracy can be guaranteed at fault, and the fault is convenient and intensive to analyze.

Description

technical field [0001] The invention relates to a power system, in particular to a fault recording method applied to a power system. Background technique [0002] The fault recorder is an important automatic device to improve the safe operation of the power system. When the power system fails or oscillates, it can record the fault and automatically record the changes of various electrical quantities during the entire fault process. Specifically, the fault recorder is used in the power system. When a fault occurs in the system, it can automatically and accurately record the changes of various electrical quantities in the process before and after the fault. Through the analysis and comparison of these electrical quantities, the analysis It plays an important role in handling accidents, judging whether the protection is operating correctly, and improving the safe operation level of the power system. Limited to the large amount of collected data and hardware costs, fault record...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 薛占钰邢进春杨贤
Owner BAODING YUXIN ELECTRICAL TECH