CN204731568U - Compressed water reactor nuclear power head of a station rod control data acquisition system - Google Patents
Compressed water reactor nuclear power head of a station rod control data acquisition system Download PDFInfo
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- CN204731568U CN204731568U CN201420867263.8U CN201420867263U CN204731568U CN 204731568 U CN204731568 U CN 204731568U CN 201420867263 U CN201420867263 U CN 201420867263U CN 204731568 U CN204731568 U CN 204731568U
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Abstract
The utility model is a kind of compressed water reactor nuclear power head of a station rod control data acquisition system, gather the current signal of presurized water reactor control rod drive mechanisms (CRD) coil, outside tested current signal is converted to standard voltage signal by current/voltage transition components, signal after conversion collects PXI controller by PXI high-speed data acquisition card, PXI controller carries out data acquisition and the monitoring in real time of measured signal, and all historical datas collected are stored into the disk array as web data server by network service UDP/FTP mode.The utility model solves the knotty problem of two Rod control and position indication systems, and one, the acquisition and recording analysis of fault moment feedback current shape information; Two, the main line time of water heater chiller unit before reactor startup is greatly reduced.The utility model can improve maintenance personal greatly for the accuracy of breakdown judge and rapidity, thus solves fault at short notice, and while providing guarantee to the long-term safety stable operation of pressurized-water reactor nuclear power plant, economic benefit is also clearly.
Description
Technical field
The utility model belongs to field of pressurized water reactor nuclear, is specifically related to the design of a novel data acquisition backup system of the long rod control system of a kind of pressurized water reactor nuclear power station control bar.
Background technology
As shown in Figure 1, presurized water reactor control rod drive mechanisms (CRD) (hereinafter referred to as CRDM) is one of critical component of reactor control system and protection system, decides runnability and the safety of reactor.It is movable member unique in nuclear reactor pressure container, and its fault or performance degradation may cause step-out, sliding rod, be unable to lift and rod seizure accident, will affect unit availability and security time serious.
Normal hoisting seven point operations, be followed successively by: 1. lift armature adhesive (fixing grapple band rod rises), 2. movable grapple grab into, 3. fix grapple to exit, 4. load is passed to movable grapple, 5. lift armature release (fixing grapple be not with rod decline), 6. fix grapple grab into, 7. movable grapple exits.Fuel rod is finally remained on by the position promoted by fixing grapple.
Normal insertion seven point operations, be followed successively by: 1. movable grapple grab into, 2. fix grapple to exit, 3. load transmission (falling movable grapple from fixing grapple), 4. lift armature adhesive (fixing grapple is not with rod to rise), 5. fix grapple grab into, 6. movable grapple exits, 7. lift armature release (fixing grapple band rod decline).The position that fuel rod finally remains on decline by fixing grapple and is inserted into;
A set of CRDM correspond to 3 cover current regulation loop (respectively corresponding lifting, maintenance and delivered current) in the long rod control system of control rod, just by the output current control CRDM two width grapple action of current regulation loop as shown in Figure 2, and then the elevating control realized control rod, regulate the reactivity of reactor.
The reason of CRDM action failure can be divided into two aspects.Be that driving mechanism electrical control equipment fault causes coil current waveform abnormal on the one hand, this can be confirmed by pilot wire loop current size, ripple, transient process.That driving mechanism mechanical component failures causes mechanism action abnormal on the other hand, this fault can by checking that the operating point on coil current waveform finds, also, after may needing to wait action failure to run up to and to a certain degree cause control rod position failure, could be found by Monitor and Control rod position.Therefore, in daily excellent controlling fault maintenance, fault moment coil current feedack is the important means of technician's analyzing failure cause.
The corresponding relation of concrete coil current feedback waveform and point operation as shown in Figure 3, Figure 4.
CRDM action failure pattern can be divided into following several.
(1) size of current fault
Refer to that CRDM current control loop fault causes output current and setting value to have deviation.The too large coil that may make of electric current is overheated, and the too little armature that may make of electric current cannot action.Standby current size must be carried out in conjunction with electrical instruction sequential, and electrical instruction checks after sending certain hour whether output current reaches required value, permissible variation ± 5%.
(2) current transition process is oversize
Refer to that rise-time of current, negative edge are too mild, consequence is that armature movement point is delayed, makes the transmission of grapple load go wrong time serious, pulls phenomenon or sliding excellent phenomenon, scratches driving shaft.
(3) attonity point
CRDM armature rises, and when magnetic gap closes, the instantaneous increase of inductance, makes the output current short time decline, and shows on coil current waveform it is that electric current rises to a certain degree an appearance pit afterwards.Then can confirm that corresponding grapple is not operating as monitored Current rising phase without pit.
(4) current oscillation
For accelerating CRDM current transition process, each coil has a closed loop current regulating loop being with output feedack.The improper output current that will make of regulating loop parameter produces vibration, and CRDM operating point is caused confusion.
(5) ripple large (phase shortage or each mutually unbalanced)
Output current ripple is large may mean that regulating loop has occurred a certainly in vibration or three phase half wave rectification having occurred fault mutually, and its consequence is that operating point is chaotic, or output current reaches not desired value, even occurs sliding excellent accident.
(6) operating point is connected problem
Move needs 7 actions that move a step, need mutually to be connected between fixing grapple, movable grapple, lift armature, close fit, slightly namely pullling, falling rod or lifting Its Failures may appear in mistake.Operating point is connected and is in a disguised form checked by coil current waveform.
Although so large effect is played in the analysis of current feedback waveform to fault, but not standing a kind of online current feedback information monitoring memory device in the long rod control system of traditional presurized water reactor, after fault occurs, only carry out alarm indication process by common error listing default in PLC control system, fault greatly, only leave alarm logging at that time, the most important coil current feedback information of fault moment but cannot reappear, and the data analyzed provided to maintainer are few.
Although we can using the data memory recorder of access as 8841 as auxiliary on-line monitoring, but such registering instrument does not often reach the demand of rod control system all far away on port number and on data storage capacity, and this means can only as after first-time fault produces, catch the use of fault recurrence data, the data recording function of fault moment primary scene cannot be accomplished.Bring very large trouble to the fault analysis of long rod control system maintenance, the stability and safety directly having had influence on nuclear power station is run.
Utility model content
The purpose of this utility model is for long rod control system adds a data acquisition backup system not participating in controlling, and is responsible for the collection of all current feedback waveforms, stores, judge, display, analyze.
The utility model is a kind of compressed water reactor nuclear power head of a station rod control data acquisition system, gathers the current signal of presurized water reactor control rod drive mechanisms (CRD) coil, wherein, comprising: current/voltage transition components, PXI platform, disk array;
PXI platform comprises: PXI high-speed data acquisition card, PXI controller;
Outside tested current signal is converted to standard voltage signal by current/voltage transition components, 0 ~ 5VDC, signal after conversion collects PXI controller by PXI high-speed data acquisition card, PXI controller carries out data acquisition and the monitoring in real time of measured signal, and all historical datas collected are stored into the disk array as web data server by network service UDP/FTP mode.
A kind of compressed water reactor nuclear power head of a station rod control data acquisition system as above, wherein: current/voltage transition components comprises the current sensor of Hall type, identical with the element measuring presurized water reactor control rod drive mechanisms (CRD) coil, and with measure the element measuring coil signal simultaneously of presurized water reactor control rod drive mechanisms (CRD) coil.
Advantageous Effects of the present utility model is:
Fundamentally solve the knotty problem of two Rod control and position indication systems, one, the acquisition and recording analysis of fault moment feedback current shape information; Two, the main line time of water heater chiller unit before reactor startup is greatly reduced.
By carrying out real-time round-the-clock monitoring to long rod control system major parameter, on-line monitoring is carried out to control rod drive mechanisms (CRD) ruuning situation, for timely tracing trouble, accumulation historical data analytical performance variation tendency etc. provide strong means, particularly in fault diagnosis, the real-time major parameter recording rod control system makes it possible to after fault occurs, there is the system state data in moment in playback fault at any time, greatly can improve maintenance personal for the accuracy of breakdown judge and rapidity, thus solve fault at short notice.Can enter provide auxiliary to water heater chiller unit such as Rod drop tests between overhaul time, avoid frequent wiring, save a large amount of main line time, decrease a large amount of economic losses because the delay main line time brings.So the long-term safety stable operation of the utility model to pressurized-water reactor nuclear power plant provide guarantee while economic benefit be also clearly.
Accompanying drawing explanation
Fig. 1 control rod drive mechanisms (CRD) partly cuts open schematic diagram;
Fig. 2 long rod control system current regulation loop schematic diagram;
Fig. 3 current feedback waveform schematic diagram (lifting) corresponding to driving mechanism point operation;
Fig. 4 current feedback waveform schematic diagram (decline) corresponding to driving mechanism point operation;
Fig. 5 rod control data acquisition system (DAS) hardware composition schematic diagram;
Fig. 6 rod control data acquisition system (DAS) Functional Design schematic diagram.
Wherein, 1 promotes coil, 2 movable grapple coils, 3 fixing grapple coils, 4 driving stems (fuel rod), 5 promote magnetic pole, 6 lift armatures, 7 movable grapple armature (closure state), 8 fixing grapple magnetic poles, 9 fixing grapple armature (open mode).
Embodiment
Below in conjunction with drawings and Examples, the utility model is described further.
Realize scheme of the present utility model and be the increase in a data gather computer cabinet, this rack introduces the coil current feedback signal of all clusters up to a hundred passages; Rod control system alerting signal, excellent action, the signals such as excellent direction; Stick location probe coil sensor current signal; All signals are converted to the voltage signal required for acquisition platform by isolation conversion fastener, are illustrated in figure 5 the graph of a relation of data acquisition cabinet and Rod control and position indication system.
Nucleus equipment adopts the PXI acquisition platform of NI company, coordinates LABVIEW Virtual Instrument Development external member, the special big data quantity disk array of NI, have developed a set of collection waveform and detect in real time, show, store; Online the inquiry of historical data, extraction, analysis; The backup system that the special Row control of water heater chiller unit is integrated.
Hardware system of the present utility model is primarily of PXI platform, current/voltage transition components, disk array forms, it is that real-time is high that worry has to data acquisition, sampling rate is fast, store analyze the features such as data capacity is large, for ensureing runnability and the reliability of acquisition controller, by signals collecting, data store and off line data analysis three zones separates, PXI acquisition controller primary responsibility signals collecting and in real time monitoring (data query, analytic function retains), history data store is on external disk array, off line data analysis function can be undertaken by external special notebook computer.
Outside tested current signal is converted to standard voltage signal (0 ~ 5VDC) by the current/voltage transition components of customization, signal after conversion collects PXI controller by PXI high-speed data acquisition card, PXI controller is responsible for data acquisition and the monitoring in real time of all measured signals, the all historical datas collected are stored into (disk array) in web data server by network service (UDP/FTP) mode, and off line data analysis function can use notebook computer to be undertaken by the data on network service access data services device.Schematic diagram is as Fig. 5.
The utility model requires that whole acquisition system can run smoothness, and CPU usage is low, and waveform monitoring function will run through the whole system cycle of operation, and the data query carried out on this basis can quick position.Major function process flow diagram is Fig. 6.Below describe in detail.
1. man-machine interface
Rod control data acquisition system (DAS) will by operator on acquisition platform, start rod control data acquisition system program, enter operation key frame by dialog boxes for login, the function menu that key frame will pass through containing function menu operator needed for selection, corresponding function can be entered.
2. center is set
User is arranged:
For guaranteeing handling safety, system should be provided with secondary password, is respectively user class and supervisor level.
Monitoring parameter is arranged:
Can following important adjustable parameter be modified, be preserved in this is arranged:
The sampling rate of capture card: provide an acquisition rate adjustable extent according to capture card performance.
Dynamic excellent reference parameter: judge whether certain section of waveform is excellent waveform according to the parameter provided.
Store and arrange:
The path of preserving data in waveform monitoring and Rod drop test can be modified, preserved in this is arranged.
The file division mode that data in waveform monitoring and Rod drop test store can be modified, preserved in this is arranged.(because the data volume stored is very large, an independently binary file can not be saved as, need the segmentation carrying out file)
Parameter can be deleted to stale data in waveform monitoring to arrange in this is arranged.
3. data collection and display module
Functional overview:
Coil current signal is converted to the acceptable voltage signal of capture card through signal conversion part, voltage signal is collected by capture card, and be plotted as oscillogram and show in real time, and the data collected are stored, memory requirement is the data of current time within first 72 hours.Stale data will be deleted in time.To gather the carrying out of the digital signal that 5 logic cabinets are sent here and show in addition.
In observation process, to dynamic excellent waveform, warning waveform carries out judgement and independent persistence.
Gather display section:
According to the set of frequency sampling period parameter of CRDM coil current, this parameter can be modified in the heart in arranging.
4. data store stale data removing module
After monitoring display starts, activate and store operation, will carry out record to the data collected simultaneously, the pattern of stored record wants reasonable, simple, is convenient to inquire about fast in the future, extracts.Can ensure that the current time data of first 72 hours can be queried after storage operation starts, expired data can be deleted timely.Provide the real-time display of storage size, remind operating personnel to delete work and whether carrying out.
5. water heater chiller unit module
Functional overview:
Water heater chiller unit needs the step function integrality, logic function integrality, rod drop time etc. of measuring all clusters, and metering system can be divided into Dan Shu, subgroup and overall measurement.Measure the holding coil current waveform and electromagnetic induction voltage waveform that need monitoring and record cluster.
Special rod drop time is the important performance assessment criteria being related to safe shutdown, and it refers to that control rod is from the time that arrival guide pipe in stroke peak whereabouts is blurted out and from buffer mouth to the time of stroke minimum point.Performance assessment criteria as driving mechanism Drop performance aspect is total travel rod drop time (being generally 2s).Being current cluster scram with holding coil when small area analysis becomes 0, be tending towards the smooth end for scram with induced voltage vibration, the time is between the two exactly rod drop time.Rack needs provide rod drop time relay power switch.
In water heater chiller unit subsidiary function, this project combing flow process of all tests, has worked out a large amount of automatic business processing routines, has thoroughly abandoned memory recorder, made whole process of the test procedure, planningization, simplifies.
6. historical data online query
Playback can be carried out to the Wave data of systematic conservation in the impregnable situation of guarantee waveform monitoring function, provide simple and effective wave form analysis to contrast instrument, such as amplify, reduce, translation, the time difference calculates automatically, amplitude calculates automatically, hides the means such as display waveform.(as the graphical control carried with Labview, need expand its function and optimize, ensure the convenient effective of operation)
Can be read by given querying condition, the shape information of each cluster required for display, provides similar page-turning function, and convenient operation personnel carry out fault moment waveform fast finding.Querying condition enriches, and comprises time range, cluster title etc., can carry out query display contrast to the waveform of multi beam rod.To setting out excellent shape information list, each time crawl rod waveform can be checked one by one.Provide warning time list, for operating personnel's reference.
For fault moment judgement aspect, this project does not stick to only carries out judging rear storage failure information according to criterion, but novelty add one-period without criterion memory function, the appearance of any fault all will be gone on record, there will not be the possibility of error of omission.Because port number is many, store data volume very huge, also can not there is no need the data recording every day, system limits the data retention period collected, and this restriction can freely be arranged, and determines its maximal value by the size of storage medium capacity.The data exceeding this time limit will be recycled deletion.
Above embodiment of the present utility model is explained in detail, above-mentioned embodiment is only optimum embodiment of the present utility model, but the utility model is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, can also make a variety of changes under the prerequisite not departing from the utility model aim.
Claims (2)
1. a compressed water reactor nuclear power head of a station rod control data acquisition system, gathers the current signal of presurized water reactor control rod drive mechanisms (CRD) coil, it is characterized in that, comprising: current/voltage transition components, PXI platform, disk array;
PXI platform comprises: PXI high-speed data acquisition card, PXI controller;
Outside tested current signal is converted to standard voltage signal by current/voltage transition components, 0 ~ 5VDC, signal after conversion collects PXI controller by PXI high-speed data acquisition card, PXI controller carries out data acquisition and the monitoring in real time of measured signal, and all historical datas collected are stored into the disk array as web data server by network service UDP/FTP mode.
2. a kind of compressed water reactor nuclear power head of a station rod control data acquisition system as claimed in claim 1, it is characterized in that: current/voltage transition components comprises the current sensor of Hall type, identical with the element measuring presurized water reactor control rod drive mechanisms (CRD) coil, and with measure the element measuring coil signal simultaneously of presurized water reactor control rod drive mechanisms (CRD) coil.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677963A (en) * | 2017-08-09 | 2018-02-09 | 江西山水光电科技股份有限公司 | A kind of computer room battery pack early warning system |
| CN110689982A (en) * | 2019-11-01 | 2020-01-14 | 中核核电运行管理有限公司 | Emergent grabbing device of cobalt isotope rod cluster snap ring retainer ring |
| CN113734535A (en) * | 2021-08-06 | 2021-12-03 | 阳春新钢铁有限责任公司 | Control method for section crease falling of double-altitude line rod collection |
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2014
- 2014-12-30 CN CN201420867263.8U patent/CN204731568U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677963A (en) * | 2017-08-09 | 2018-02-09 | 江西山水光电科技股份有限公司 | A kind of computer room battery pack early warning system |
| CN110689982A (en) * | 2019-11-01 | 2020-01-14 | 中核核电运行管理有限公司 | Emergent grabbing device of cobalt isotope rod cluster snap ring retainer ring |
| CN113734535A (en) * | 2021-08-06 | 2021-12-03 | 阳春新钢铁有限责任公司 | Control method for section crease falling of double-altitude line rod collection |
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