CN108646084A - The method for monitoring the oscillation of reactor control rod driving mechanism coil current rising edge - Google Patents
The method for monitoring the oscillation of reactor control rod driving mechanism coil current rising edge Download PDFInfo
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- CN108646084A CN108646084A CN201810449350.4A CN201810449350A CN108646084A CN 108646084 A CN108646084 A CN 108646084A CN 201810449350 A CN201810449350 A CN 201810449350A CN 108646084 A CN108646084 A CN 108646084A
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- current
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- rising edge
- oscillation
- driving mechanism
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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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- General Induction Heating (AREA)
Abstract
The invention discloses the methods of monitoring reactor control rod driving mechanism coil current rising 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, isolating every section of Current rising phase data；In electric current uphill process, the extreme value of each Current rising phase array is extracted, electric current is established and rises extreme value array, it includes a maximum value or minimum value that each electric current, which rises in extreme value array,；Judge that each electric current rises and rising edge oscillation whether occurs in extreme value array；The number vibrated in record current uphill process, when the number of oscillation is more than 3 alarms.It realizes to coil current rising 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 rising 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
Stick processed promotes or declines the close fit that a step needs three groups of electric currents, and electric current slightly mistake is likely to occur and pulls, falls stick or mistake
Spirit.
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 in uphill process, 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 on a kind of monitoring reactor control rod driving mechanism coil current
Rise the method 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 rising 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 Current rising phase data are isolated；
C, in electric current uphill process, the extreme value of each Current rising phase array is extracted, electric current is established and rises extreme value array, often
It includes a maximum value or minimum value that a electric current, which rises in extreme value array,；
D, judge that each electric current rises and rising edge oscillation whether occurs in extreme value array；
E, the number vibrated in record current uphill process, when the number of oscillation is more than threshold value alarm.
It is realized to coil current rising 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 rises extreme value array, adjacent maximum before and after each minimal point is searched；
The difference or more current falling value for calculating previous maximum and current minimum add N1 with next increasing degree, if preceding
The current minimum ＞ N2 or current falling values of one maximum-add N1 more than next increasing degree, then rising edge oscillation occur, wherein line
When circle is promotes coil, N1 1A, N2 7A；Coil is N1 0.2A, N2 1A when transmitting coil or hold-in winding.It is existing
The slope being fitted using ascending curve, actual numerical value are deviateed fit slope and think the value that transfinites.It is more embodied using this method
It is whole deviation, smaller is reacted to local Wave anomaly.
Preferably, the Hall sensor is separately mounted to promote coil, hold-in winding and transmit on coil.
Preferably, in order to be precisely separating out rising segment data, the average value of adjacent 5 numerical value is more than N4 as rising edge
Starting point, it is rising edge terminal that the average value of adjacent 5 numerical value, which is more than N5, and rising edge starting point to one section between rising edge terminal is
Rise segment data, wherein coil is N4 0.3A, N5 40A when promoting coil；When coil is transmission coil or hold-in winding,
N4 is 0.1A, N5 8A.Closer to reality from image, that is, the image isolated is exactly the data isolated using these values
Rise that section, accurate higher.
Compared with prior art, the present invention having the following advantages and advantages：
1, it is realized to coil current rising 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 obtained.
Fig. 2 is to current waveform figure after in Fig. 1 A, B sections.
Fig. 3 is the current waveform figure that rise-time of current oscillation occurs, wherein C points are previous maximum, and D is current minimum
Value.
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 rising 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 Current rising phase data are isolated；
C, in electric current uphill process, the extreme value of each Current rising phase array is extracted, electric current is established and rises extreme value array, often
It includes a maximum value or minimum value that a electric current, which rises in extreme value array,；
D, judge that each electric current rises and rising edge oscillation whether occurs in extreme value array；
E, the number vibrated in record current uphill process, 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 to obtain oscillogram as shown in Figure 1, then map of current shown in FIG. 1 is carried out at current segmenting
Reason；As shown in Fig. 2, in electric current uphill process, the average value of adjacent 5 numerical value is more than N4 as rising edge starting point, adjacent 5
It is rising edge terminal that the average value of numerical value, which is more than N5, and rising edge starting point to one section between rising edge terminal is to rise segment data,
A, B section i.e. in figure, facilitates the analysis of the oscillation of next step.Wherein, coil is N4 0.3A, N5 40A when promoting coil；Line
When circle is transmits coil or hold-in winding, N4 0.1A, N5 8A.
C, in electric current uphill process, waveform extremum search is carried out to the discrete array of the Current rising phase of extraction, seeks part
The maximin of steamed bun wave, the specific judgment method of maximum：If any point ax, if ax is more than ax-1 and ax is more than ax+1,
Then mono- maximum points of ax；Similarly minimum bx is less than bx-1 and bx is less than bx+1, then bx is minimum point, wherein x indicates the time
Point；It establishes electric current and rises extreme value array, it includes a maximum value or minimum value that each electric current, which rises in extreme value array value,.
D, in electric current rises extreme value array, adjacent maximum before and after each minimal point is searched；
The difference or more current falling value for calculating previous maximum and current minimum add N1 with next increasing degree, if preceding
The current minimum ＞ N2 or current falling values of one maximum-add N1 more than next increasing degree, then rising edge oscillation occur, such as Fig. 3 institutes
Show.Wherein, coil is N1 1A, N2 7A when promoting coil；Coil is N1 0.2A, N2 when transmitting coil or hold-in winding
For 1A.
E, the number vibrated in record current uphill process, when the number of oscillation is more than threshold value alarm, threshold herein
Value preferably 3.
The rising 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 rising 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 intended to limit the present invention
Protection domain, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (4)
1. the method for monitoring the oscillation of reactor control rod driving mechanism coil current rising 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 Current rising phase data；
C, in electric current uphill process, the extreme value of each Current rising phase array is extracted, electric current is established and rises extreme value array, Mei Ge electricity
It includes a maximum value or minimum value that stream, which rises in extreme value array,；
D, judge that each electric current rises and rising edge oscillation whether occurs in extreme value array；
E, the number vibrated in record current uphill process, when the number of oscillation is more than threshold value alarm.
2. the method for monitoring reactor control rod driving mechanism coil current rising edge oscillation according to claim 1,
It is characterized in that, step D specific methods are：
In electric current rises extreme value array, adjacent maximum before and after each minimal point is searched；
The difference or more current falling value for calculating previous maximum and current minimum add N1 with next increasing degree, if previous pole
The current minimum ＞ N2 or current falling values of big value-add N1 more than next increasing degree, then rising edge occurs and vibrates, wherein coil is
When promoting coil, N1 1A, N2 7A；Coil is N1 0.2A, N2 1A when transmitting coil or hold-in winding.
3. the method for monitoring reactor control rod driving mechanism coil current rising 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 rising edge oscillation according to claim 1,
It is characterized in that, the average value of adjacent 5 numerical value is more than N4 as rising edge starting point, and the average value of adjacent 5 numerical value is more than N5
Rising edge terminal, rising edge starting point to one section between rising edge terminal are every section of Current rising phase data, wherein coil is to carry
When rising coil, N4 0.3A, N5 40A；Coil is N4 0.1A, N5 8A when transmitting coil or hold-in winding.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599255A (en) * | 2020-12-05 | 2021-04-02 | 核电运行研究(上海)有限公司 | Control rod drop reference signal generating device and method thereof |
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| CN104330611A (en) * | 2013-07-22 | 2015-02-04 | 中国核动力研究设计院 | Method for monitoring reactor control rod drive mechanism coil current amplitude |
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| JPS61117487A (en) * | 1984-11-13 | 1986-06-04 | 三菱電機株式会社 | Controller for driving mechanism of control rod |
| JPH08105992A (en) * | 1994-10-03 | 1996-04-23 | Mitsubishi Electric Corp | Operation monitor device for nuclear reactor control rod drive mechanism |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112599255A (en) * | 2020-12-05 | 2021-04-02 | 核电运行研究(上海)有限公司 | Control rod drop reference signal generating device and method thereof |
| CN112599255B (en) * | 2020-12-05 | 2023-02-10 | 核电运行研究(上海)有限公司 | Control rod drop reference signal generating device and method thereof |
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Application publication date: 20181012 |