CN105738737A

CN105738737A - Fault recording method

Info

Publication number: CN105738737A
Application number: CN201610095153.8A
Authority: CN
Inventors: 薛占钰; 邢进春; 杨贤
Original assignee: Baoding Yuxin Electrical Technology Co ltd
Current assignee: Baoding Yuxin Electrical Technology Co ltd
Priority date: 2016-02-22
Filing date: 2016-02-22
Publication date: 2016-07-06
Anticipated expiration: 2036-02-22
Also published as: CN105738737B

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

A kind of failure wave-recording method

Technical field

The present invention relates to power system, in particular to a kind of failure wave-recording method being applied to power system.

Background technology

Fault oscillograph is the important automaton improving safe operation of power system, and when power system is broken down or vibrates, it can carry out failure wave-recording, automatically records the change of various electric parameters in whole failure process.Specifically; fault oscillograph is used for power system; can when system jam; automatically, the situation of change of the various electric parameters of the forward and backward process of record trouble exactly; by these electric quantitative analyses, compare, to analyzing and processing accident, judge to protect whether correct operation, improve the equal important role of safe operation of power system level.It is limited to the huge of gathered data volume and hardware cost, electrical data under normal circumstances generally can not be acquired storage by fault oscillograph, and the various electrical data that can only record before and after the threshold value out-of-limit moment in the of short duration time, but the determination of threshold value itself is an extremely complex problem, even if sometimes not occurring threshold value out-of-limit, there is also the needs of research respective electric amount data, now because not carrying out recording ripple and no data can be studied.

Summary of the invention

It is an object of the invention to provide a kind of failure wave-recording method, the method can the electrical data of accurate recording threshold value more in limited time system, simultaneously also can with the electrical data of rational memory space record usual period, thus providing objective reliable data basis for carrying out comprehensive system analysis.

To achieve these goals, the present invention adopts the following technical scheme that:

A kind of failure wave-recording method, it is characterised in that comprise the steps:

A () gathers data with first frequency f and is stored in internal memory by the datacycle gathered, storage duration is the first duration t1；

B the part datacycle gathered with step (a) simultaneously, is stored in hard disk with second frequency f/n by (), n is the natural number be more than or equal to 2；

C () is when occurring that threshold value is out-of-limit, internal storage data before out-of-limit for the threshold value moment is stored in hard disk, starting, with first frequency f sampling and with first frequency f, the total data gathered is stored in hard disk from the threshold value out-of-limit moment, storage duration is the second duration t2, then repeats step (a) (b) simultaneously.

Preferably, described first frequency f is 1 ~ 20kHz, and described n is be more than or equal to 2 and less than or equal to 20, and described first duration t1 is 50 ~ 500 milliseconds, and the second duration t2 is 50 ~ 500 milliseconds.

The present invention utilize two different frequencies and and internal memory, the pattern that hard disk combines is operated, sample with higher first frequency and be immediately stored in internal memory, with relatively low second frequency, part data are stored in hard disk simultaneously, sample with upper frequency while then internal storage data being stored in hard disk when breaking down and be also stored in hard disk, this intensive not only contributing to ensure data during fault and accuracy, it is easy to fault is carried out intensive analysis, this method also maintains the usual period data that data volume is less simultaneously, these data data as a setting contribute to the understanding to fault data, but also the information of the safe operation outside being provided that fault data.Therefore this Wave record method contributes to the overall picture that run by data exposing system, is conducive to analysis personnel quickly to analyze and fixes a breakdown, it helps power system is optimized.

Detailed description of the invention

Below by specific embodiment, the present invention will be further described:

This failure wave-recording method comprises the steps, first gathers data with first frequency f and is stored in internal memory by the datacycle gathered, and storage duration is the first duration t1；Meanwhile with second frequency f/n, the part datacycle gathered being stored in hard disk, n is the natural number be more than or equal to 2；When occurring that threshold value is out-of-limit, internal storage data before out-of-limit for the threshold value moment is stored in hard disk, starting, with first frequency f sampling and with first frequency f, the total data gathered is stored in hard disk from the threshold value out-of-limit moment, storage duration is the second duration t2, then repeats step (a) (b) simultaneously.

In concrete practice, first frequency f is generally 1 ~ 20kHz, as 10kHz, n are generally higher than equal to 2 and less than or equal to 20, if n is 10, now second frequency is 1kHz etc., and the first duration t1 is 50 ~ 500 milliseconds, such as 400 milliseconds, the second duration t2 is 50 ~ 500 milliseconds, such as 300 milliseconds.

Following Wave record method can be realized: when sampling at ordinary times by wave recording device, sample with the sampling rate of 10kHZ, and circulate 400 milliseconds of data of storage in internal memory, and (data being stored in after hard disc data district is filled with take the space storing data at first with the memory rate of 1kHZ, above-mentioned part data to be stored in hard disk in real time, circulate storage successively), once occur the threshold value set out-of-limit, then the 10kHZ data of 300 milliseconds after the 10kHZ sampled data of out-of-limit for threshold value first 100 milliseconds (can certainly be the data of all of 400 milliseconds) and fault are preserved by fault recorder data as failure wave-recording file.When carrying out data analysis, failure wave-recording file provides intensive and the accurate fault period of right time the various electrical data of system, there is also the data (1kHz storage) that before and after fault generation, the closeness at ordinary times of long duration is less simultaneously, these data data as a setting, analyze fault data for deep understanding and provide powerful support.In addition, this method had not only been taken into account the gradual data of record system and simultaneously but also accurately have recorded fault data, once owing to a variety of causes device when a failure occurs it does not have startup separator record wave-path sequence, the real-time recorded data of 1kHZ during its generation disturbance can also bring the use as brief analysis.

The present embodiment is an explanation to present inventive concept and realization, is not limited, and under present inventive concept, remains in protection domain without the technical scheme of essence conversion.

Claims

1. a failure wave-recording method, it is characterised in that comprise the steps:

Gathering data with first frequency f and be stored in internal memory by the datacycle gathered, storage duration is the first duration t1；

With step (a) simultaneously, with second frequency f/n, the part datacycle gathered being stored in hard disk, n is the natural number be more than or equal to 2；

When occurring that threshold value is out-of-limit, internal storage data before out-of-limit for the threshold value moment is stored in hard disk, starting, with first frequency f sampling and with first frequency f, the total data gathered is stored in hard disk from the threshold value out-of-limit moment, storage duration is the second duration t2, then repeats step (a) (b) simultaneously.

2. failure wave-recording method as claimed in claim 1, it is characterised in that described first frequency f is 1 ~ 20kHz, and described n is be more than or equal to 2 and less than or equal to 20, and described first duration t1 is 50 ~ 500 milliseconds, and the second duration t2 is 50 ~ 500 milliseconds.