CN108680783A - The method for monitoring the oscillation of reactor control rod driving mechanism coil current failing edge - Google Patents
The method for monitoring the oscillation of reactor control rod driving mechanism coil current failing edge Download PDFInfo
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- CN108680783A CN108680783A CN201810448216.2A CN201810448216A CN108680783A CN 108680783 A CN108680783 A CN 108680783A CN 201810448216 A CN201810448216 A CN 201810448216A CN 108680783 A CN108680783 A CN 108680783A
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- current
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- electric current
- failing edge
- oscillation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses the methods of monitoring reactor control rod driving mechanism coil current failing edge oscillation, include the following steps：Independent Hall sensor is set on driving mechanisms control device, acquires the running current signal of tri- coils of CRDM；Voltage signal is pre-processed and be converted into the current signal of CRDM operations, converted, filtered, current segmenting processing, isolated every section of electric current and decline segment data；Decline process in electric current, extract the extreme value of each electric current descending branch array, establishes electric current and decline extreme value array, it includes a maximum value or minimum value that each electric current, which declines in extreme value array,；Judge that each electric current declines and failing edge oscillation whether occurs in extreme value array；The number that record current vibrates during declining, when the number of oscillation is more than 3 alarms.It realizes to coil current failing edge analysis of the oscillation, realizes the monitoring to driving mechanism performance, reach failure judgement in advance, improve driving mechanism safety.
Description
Technical field
The present invention relates to reactor control rod driving mechanism coil current fault monitoring method fields, and in particular to Yi Zhongjian
The method for surveying the oscillation of reactor control rod driving mechanism coil current failing edge.
Background technology
Pressurized-water reactor nuclear power plant uses a kind of dependence moving coil electromagnetism hoist type driving mechanism, it relies on stick control stick position
Three groups of sequential current switchings that system RGL is provided realize electromagnet and hook action, to realize the stepwise operation of control rod.
Control rod promoted or decline a step need three groups of electric currents close fit, electric current slightly mistake i.e. be likely to occur pull, fall stick or
Failure.
The failure that coil current occurs mainly has current amplitude to transfinite, make-and-break time node mistake and current oscillation etc..Electricity
Stream amplitude transfinite may cause coil heating, make-and-break time chronologically break-make be driving mechanism normal operation guarantee.For electricity
Stream amplitude transfinites to exist with make-and-break time node mistake《A kind of side for monitoring reactor control rod driving mechanism current amplitude
Method》With《A method of for monitoring reactor control rod driving mechanism operating point》There is corresponding judgment method research.But
At present relevant method and research are there is no for the diagnosis of current oscillation.
Driving mechanism coil current is likely to occur current oscillation during declining, these oscillations may be due to mechanical structure
Wild effect caused by the reasons such as component or power-supply system such as has found that it is likely that and causes driving mechanism failure not in time.
Invention content
In order to solve the above-mentioned technical problem the present invention is provided under a kind of monitoring reactor control rod driving mechanism coil current
Method of the drop along oscillation.
The present invention is achieved through the following technical solutions：
The method for monitoring the oscillation of reactor control rod driving mechanism coil current failing edge, includes the following steps：
A, independent Hall sensor on driving mechanisms control device is set, the running current of tri- coils of CRDM is acquired
Signal；
B, voltage signal is pre-processed and is converted into the current signal of CRDM operations, converted, filtered, electricity
Segment processing is flowed, every section of electric current is isolated and declines segment data；
C, decline process in electric current, extract the extreme value of each electric current descending branch array, establish electric current and decline extreme value array, often
It includes a maximum value or minimum value that a electric current, which declines in extreme value array,；
D, judge that each electric current declines and failing edge oscillation whether occurs in extreme value array；
E, the number that record current vibrates during declining, when the number of oscillation is more than threshold value alarm.
It is realized to coil current failing edge analysis of the oscillation by this method, realizes the monitoring to driving mechanism performance, reach
Failure judgement in advance improves the purpose of driving mechanism safety.
Preferably, step D specific methods are：
In electric current declines extreme value array, adjacent minimum before each maximal point is searched；
The difference of current maximum and previous minimum is calculated, if the previous minimum ＞ N1 of preceding maximum-, decline
Along oscillation, wherein coil is N1 5A when promoting coil；Coil is N1 1.5A when transmitting coil or hold-in winding.
Preferably, the Hall sensor is separately mounted to promote coil, hold-in winding and transmit on coil.
As failing edge starting point when the average value of adjacent 5 numerical value is less than N2, when the average value of adjacent 5 numerical value is less than N3
As failing edge terminal, failing edge starting point to one section between failing edge terminal is that every section of electric current declines segment data, wherein line
When circle is promotes coil, N2 39.5A, N3 0.1A；Coil is when transmitting coil or hold-in winding, and N2 7.9A, N3 are
0.2A.For the data isolated using these values closer to reality from image, that is, the image isolated exactly declines that
Section, accurate higher.
The data isolated using the above method are substantially similar, are all finally that hop count groups that electric current declines.
Compared with prior art, the present invention having the following advantages and advantages：
1, it is realized to coil current failing edge analysis of the oscillation by this method, realizes the monitoring to driving mechanism performance, reach
To failure judgement in advance, driving mechanism safety is improved.
Description of the drawings
Attached drawing described herein is used for providing further understanding the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.In the accompanying drawings：
Fig. 1 is the current waveform figure of generation electric current failing edge oscillation, wherein A points are previous maximum, and B is current very big
Value, C are previous minimum.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiment and attached drawing, to this
Invention is described in further detail, and exemplary embodiment of the invention and its explanation are only used for explaining the present invention, do not make
For limitation of the invention.
Embodiment 1
The method for monitoring the oscillation of reactor control rod driving mechanism coil current failing edge, includes the following steps：
A, independent Hall sensor on driving mechanisms control device is set, the running current of tri- coils of CRDM is acquired
Signal；
B, voltage signal is pre-processed and is converted into the current signal of CRDM operations, converted, filtered, electricity
Segment processing is flowed, every section of electric current is isolated and declines segment data；
C, decline process in electric current, extract the extreme value of each electric current descending branch array, establish electric current and decline extreme value array, often
It includes a maximum value or minimum value that a electric current, which declines in extreme value array,；
D, judge that each electric current declines and failing edge oscillation whether occurs in extreme value array；
E, the number that record current vibrates during declining, when the number of oscillation is more than threshold value alarm.
Embodiment 2
Principle based on above-described embodiment, the present embodiment disclose a specific implementation mode.
A, 3 independent Hall sensors are set on the power cabinet of driving mechanisms control device, Hall sensor can
The current signal of acquisition is converted into voltage signal, specifically, 3 Hall sensors are separately mounted to promote coil, are kept
On coil and transmission coil, to acquire the running current signal of tri- coils of CRDM.
B, it after monitoring device receives CRDM running current signals, is pre-processed, current signal is converted into voltage letter
Number, and converted, be filtered, current segmenting processing；It isolates every section of electric current and declines segment data, facilitate the oscillation of next step
Analysis.Specifically, the average value of adjacent 5 numerical value is less than when being less than N2 as failing edge starting point, the average value of adjacent 5 numerical value
As failing edge terminal when N3, failing edge starting point to one section between failing edge terminal is that every section of electric current declines segment data, wherein
Coil is N2 39.5A, N3 0.1A when promoting coil；Coil is when transmitting coil or hold-in winding, and N2 7.9A, N3 are
0.2A。
C, decline process in electric current, waveform extremum search is carried out to the discrete array of the electric current descending branch of extraction, establishes electric current
Decline extreme value array, it includes a maximum value or minimum value that each electric current, which declines in extreme value array value,.
D, in electric current declines extreme value array, adjacent minimum before each maximal point is searched；
The difference of current maximum and previous minimum is calculated, if the previous minimum ＞ N1 of preceding maximum-, decline
Along oscillation, as shown in Figure 1.Wherein, coil is N1 5A when promoting coil；Coil is N1 when transmitting coil or hold-in winding
For 1.5A.
E, the number that vibrates during record current declines, when the number of oscillation is more than threshold value alarm, threshold value herein
Preferably 3.
The failing edge oscillation monitoring table and corresponding along waveform figure of CRDM operations can be also formed based on the above method；
Monitoring report is generated, and test report can be printed out immediately；Monitoring data are stored, the CRDM operation history datas are formed
Library facilitates tracking and grasps CRDM performance change trend.
This method realizes the automatic monitoring vibrated to CRDM coil current failing edges, is conducive to the event of discovery CRDM as early as possible
Hinder the symptom of a trend.
Above-described specific implementation mode has carried out further the purpose of the present invention, technical solution and advantageous effect
It is described in detail, it should be understood that the foregoing is merely the specific implementation mode of the present invention, is not used to limit this hair
Bright protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all
It is included within protection scope of the present invention.
Claims (4)
1. the method for monitoring the oscillation of reactor control rod driving mechanism coil current failing edge, which is characterized in that including following step
Suddenly：
A, independent Hall sensor, the running current letter of acquisition tri- coils of CRDM are set on driving mechanisms control device
Number；
B, voltage signal is pre-processed and is converted into the current signal of CRDM operations, converted, filtered, electric current point
Section processing isolates every section of electric current and declines segment data；
C, decline process in electric current, extract the extreme value of each electric current descending branch array, establish electric current and decline extreme value array, Mei Ge electricity
It includes a maximum value or minimum value to flow down in drop extreme value array；
D, judge that each electric current declines and failing edge oscillation whether occurs in extreme value array；
E, the number that record current vibrates during declining, when the number of oscillation is more than threshold value alarm.
2. the method for monitoring reactor control rod driving mechanism coil current failing edge oscillation according to claim 1,
It is characterized in that, step D specific methods are：
In electric current declines extreme value array, adjacent minimum before each maximal point is searched；
The difference of current maximum and previous minimum is calculated, if the previous minimum ＞ N1 of preceding maximum-, occur failing edge and shake
It swings, wherein coil is N1 5A when promoting coil；Coil is N1 1.5A when transmitting coil or hold-in winding.
3. the method for monitoring reactor control rod driving mechanism coil current failing edge oscillation according to claim 1,
It is characterized in that, the Hall sensor is separately mounted to promote coil, hold-in winding and transmit on coil.
4. the method for monitoring reactor control rod driving mechanism coil current failing edge oscillation according to claim 1,
It is characterized in that, is less than N3 as failing edge starting point, the average value of adjacent 5 numerical value when the average value of adjacent 5 numerical value is less than N2
Shi Zuowei failing edge terminals, failing edge starting point to one section between failing edge terminal are that every section of electric current declines segment data, wherein line
When circle is promotes coil, N2 39.5A, N3 0.1A；Coil is when transmitting coil or hold-in winding, and N2 7.9A, N3 are
0.2A。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810448216.2A CN108680783A (en) | 2018-05-11 | 2018-05-11 | The method for monitoring the oscillation of reactor control rod driving mechanism coil current failing edge |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110415844A (en) * | 2019-06-21 | 2019-11-05 | 杭州安脉盛智能技术有限公司 | Control rod drive mechanism performance estimating method and system based on movement crucial sequential of fault |
| CN110503069A (en) * | 2019-08-28 | 2019-11-26 | 中广核研究院有限公司 | Current waveform fluctuates starting point recognition methods and electronic equipment, readable storage medium storing program for executing |
-
2018
- 2018-05-11 CN CN201810448216.2A patent/CN108680783A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110415844A (en) * | 2019-06-21 | 2019-11-05 | 杭州安脉盛智能技术有限公司 | Control rod drive mechanism performance estimating method and system based on movement crucial sequential of fault |
| CN110503069A (en) * | 2019-08-28 | 2019-11-26 | 中广核研究院有限公司 | Current waveform fluctuates starting point recognition methods and electronic equipment, readable storage medium storing program for executing |
| CN110503069B (en) * | 2019-08-28 | 2022-10-18 | 中广核研究院有限公司 | Current waveform fluctuation starting point identification method, electronic device and readable storage medium |
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Application publication date: 20181019 |