CN103680655A - Method and system for setting default value of nuclear power plant digital instrument and control system - Google Patents
Method and system for setting default value of nuclear power plant digital instrument and control system Download PDFInfo
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Abstract
The invention discloses a method for setting a default value of a nuclear power plant digital instrument and control system. The method includes the steps of receiving a DCS signal of the nuclear power plant digital instrument and control system, judging whether the DCS signal of the nuclear power plant digital instrument and control system is effective or not, and if the signal is judged to be ineffective, setting the default value of the DCS signal of the digital instrument and control system to be a value of the last effective signal. Compared with the prior art, the method for setting the default value of the nuclear power plant digital instrument and control system has the advantage that the default value of the nuclear power plant digital instrument and control system can be rapidly and effectively set. In addition, the invention further discloses a system for setting the default value of the nuclear power plant digital instrument and control system.
Description
Technical field
The invention belongs to nuclear power technology field, more particularly, the present invention relates to a kind of nuclear plant digital instrument control system default value method to set up and system.
Background technology
Digitizing instrument control system (Digital Control System, DCS) mainly comprise: scattered control system, programmable controller (Programmable Logic Controller, PLC) and three kinds of field bus control systems (Fieldbus Control System, FCS).Default value under contrast conventional instrument control system relay mode, the DCS that domestic nuclear power plant introduces completes the setting of default value conventionally by software module, increased the ineffectivity judgement of signal and automatically chosen function.Default value refers to after DCS decision signal lost efficacy; the substitution value that DCS inside adopts this disablement signal; adopt default value can reduce the impact of DCS Signal Fail on nuclear plant safety, availability, the selection of default value is directly connected to security of operation and the equipment protection of unit.Nuclear power station DCS has its singularity, be conventionally divided into safe level and two platforms of non-security level, but DCS supplier only provides system platform, can not provide solution to the analysis of default value and the work that arranges, and designer's Analysis deterrmination of nuclear power specialty is wanted in this work.
At present, HOLLIAS platform when DCS adopts the MELTAC of Mitsubishi and core profit more, the MELTAC of Mitsubishi platform is mainly realized safe level (1E) function that comprises reactor protection system, and safe correlation level (SR) function also realizes at this platform; During core profit, HOLLIAS platform is mainly used in realizing non-security level (NC) function.Use for reference the working experience that ridge Australia second phase nuclear power station DCS default value is analyzed, in engineering design process, carried out the default value analytical work of safe level DCS, by the software logic of revising in safe level DCS, realize default value setting, as shown in Figure 1.
Fig. 1 has provided the default value method to set up of network switching amount signal, after signal fault, DUE is output as " 1 " (bypass fault-signal), being finally output as after OR-gate " 1 ", and after this method can realize signal fault, default value is set to " 1 ".After signal fault, analog quantity status monitoring function piece AUE is output as " 1 ", selects module will select " SET " (setting value), is finally output as the setting value in " SET ".In research, find, DCS system platform to different vendor, the method to set up of default value is not quite similar, and does not form default value analytical approach a set of standard, standard and method to set up in prior art, and causing cannot timely and effective recovery running when DCS breaks down.Meanwhile, even if equipment component has provided the method to set up that default value is " setting value ", but in the practical operation, from the angle of unit operation, consider, when signal fault, " setting value " still cannot avoid signal fault unit to be controlled to the disturbance of introducing, and is unfavorable for the stable operation of unit.How to carry out quickly and efficiently default value setting, be problem demanding prompt solution.
Summary of the invention
The object of the invention is to: instructing the analysis of nuclear power station security level digitizing instrument control system DCS default value, arranging in work, a kind of nuclear plant digital instrument control system default value method to set up and system are provided, during by judgement DCS Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal, to avoid " setting value " because of the signal fault disturbance that control is introduced to unit, by carrying out quickly and efficiently default value setting, realize the stable operation of unit, obtained good practice effect.
In order to realize foregoing invention object, the invention provides a kind of nuclear plant digital instrument control system default value method to set up, it comprises:
Receive nuclear plant digital instrument control system DCS signal;
Judge that whether described digitizing instrument control system DCS signal is effective;
If during described Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal.
As a kind of improvement of nuclear plant digital instrument control of the present invention system default value method to set up, describedly judge that whether described digitizing instrument control system DCS signal is effective, comprising:
If the pad value of the hardwire analog signals receiving gathers the Lower Range threshold value setting in advance in fastener lower than receiving end DCS, judge that described hardwire analog signals is disablement signal.
As a kind of improvement of nuclear plant digital instrument control of the present invention system default value method to set up, describedly judge that whether described digitizing instrument control system DCS signal is effective, comprising:
If when receiving end monitoring is communication failure, judge that described network signal is disablement signal.
As a kind of improvement of nuclear plant digital instrument control of the present invention system default value method to set up, the default value of described digitizing instrument control system DCS signal is set to the value of last useful signal, comprising:
By the default value of time delay module digitizing instrument control system DCS signal, be set to the value of last useful signal.
As a kind of improvement of nuclear plant digital instrument control of the present invention system default value method to set up, the time interval of described time delay module is set to 4 collection period.
In order to realize foregoing invention object, the present invention also provides a kind of nuclear plant digital instrument control system default value that system is set, and it comprises:
Receiver module, for receiving nuclear plant digital instrument control system DCS signal;
Judge module, whether effective for judging described digitizing instrument control system DCS signal;
Module is set, if during for described Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal.
A kind of improvement of system is set as nuclear plant digital instrument control of the present invention system default value, and described judge module judges that whether described digitizing instrument control system DCS signal is effective, comprising:
If the pad value of the hardwire analog signals that described judge module judgement receiver module receives gathers the Lower Range threshold value setting in advance in fastener lower than receiving end DCS, judge that described hardwire analog signals is disablement signal.
A kind of improvement of system is set as nuclear plant digital instrument control of the present invention system default value, and described judge module judges that whether described digitizing instrument control system DCS signal is effective, comprising:
If when described judge module judges described receiver module receiving end monitoring for communication failure, judge that described network signal is disablement signal.
A kind of improvement of system is set as nuclear plant digital instrument control of the present invention system default value, and the described module that arranges comprises:
Time delay submodule, is set to the value of last useful signal for the default value of digitizing instrument control system DCS signal.
A kind of improvement of system is set as nuclear plant digital instrument control of the present invention system default value, and the time interval of described time delay module is set to 4 collection period.
Compared with prior art, nuclear plant digital instrument control of the present invention system default value method to set up and system have following useful technique effect: during judgement DCS Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal, can avoid " setting value " because of the signal fault disturbance that control is introduced to unit, by carrying out quickly and efficiently default value setting, realize the stable operation of unit.In addition, due to without hardware is changed, cost is less, obtains good technique effect.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, nuclear plant digital instrument control of the present invention system default value method to set up and system are elaborated, in accompanying drawing:
Fig. 1 provides the structural representation of the digitizing instrument control system DCS based on Siemens TXS and TXP platform.
Fig. 2 provides the process flow diagram of an embodiment of nuclear plant digital instrument control of the present invention system default value method to set up.
Fig. 3 provides the schematic diagram of an embodiment of nuclear plant digital instrument control of the present invention system default value method to set up.
Fig. 4 provides the schematic diagram of an embodiment of nuclear plant digital instrument control of the present invention system default value method to set up.
Fig. 5 provides nuclear plant digital instrument control of the present invention system default value that the schematic diagram of an embodiment of system is set.
Embodiment
In order to make goal of the invention of the present invention, technical scheme and useful technique effect thereof more clear, below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.Should be understood that, the embodiment of describing in this instructions is only used to explain the present invention, is not intended to limit the present invention.
Incorporated by reference to referring to Fig. 2, Fig. 2 provides a kind of nuclear plant digital instrument control system default value method to set up, specifically comprises:
Step 101, receives nuclear plant digital instrument control system DCS signal;
Obtain nuclear plant digital instrument control system DCS signal, nuclear plant digital instrument control system DCS signal can comprise in switching value signal and analog signals at least a kind of;
Step 103, judges that whether digitizing instrument control system DCS signal is effective.
Mode by malfunction monitoring can judge that whether digitizing instrument control system DCS signal is effective.If the pad value of the hardwire analog signals receiving gathers the Lower Range threshold value setting in advance in fastener lower than receiving end DCS, judge that described hardwire analog signals is disablement signal.If when receiving end monitoring is communication failure, judge that described network signal is disablement signal.
Concrete, no matter be hardwire signal (comprising analog quantity and switching value) or network signal (comprising analog quantity and switching value), the treatment mechanism of nuclear plant digital instrument control system DCS signal is consistent substantially: gather signal that fastener or communication module be sent to central processing unit CPU and exist with the form of signal structure body, this structure not only comprises the numerical information of signal, also the parameter information such as the upper limit, lower limit, threshold value, quality position that comprises this signal, partial parameters information also participates in data processing and the steering logic in CPU.Quality position is used to indicate the quality state of this signal, when the numerical value of signal surpasses its upper limit or lower limit or numerical value, no longer refreshes, and quality position parameter provides the indication that signal quality is " bad ", i.e. Signal Fail in time.CPU is according to the quality state of quality position judgement signal.Quality position is " 0 " under normal circumstances, and signal is effective.
For hardwire analog signals, voltage or the current signal continuous decrement after sensor disconnection fault or transmitting terminal DCS rack fault, exported, finally reach 0V or 0mA.In signal attenuation process, if signal attenuation is to the Lower Range threshold value (being generally-10% range) setting in advance in the collection fastener lower than receiving end DCS rack, the collection fastener of receiving end DCS rack will detect the fault that transfinites, detecting after the fault that transfinites is " 1 " by the quality position of putting in respective signal structure, represent that this signal quality is " bad ", i.e. Signal Fail.
Step 105, if during Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal.
According to the mode of malfunction monitoring, judge that whether digitizing instrument control system DCS signal is effective, if this Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal.
Concrete, gathering fastener to monitoring from the sensor signal quality of digitizing instrument control system DCS, CPU monitors gathering the running status of fastener, and the communication module of receiving end rack is monitored the communication state of rack room.When DCS configuration, utilize predefined analog quantity status monitoring function piece (AUE) or on-off state monitoring function piece (DUE), in conjunction with some simple logic function blocks, can realize the default value setting of requirement, the output valve of AUE and DUE functional block depends on the quality state of source data herein, and the quality position information of source data has determined the output of AUE and DUE.
In this embodiment, during by judgement DCS Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal, can avoid " setting value " because of the signal fault disturbance that control is introduced to unit, by carrying out quickly and efficiently default value setting, realize the stable operation of unit; In addition, due to without hardware is changed, by software mode, realize without system is carried out to larger change, cost is less.
Fig. 3 provides the schematic diagram of an embodiment of a kind of nuclear plant digital instrument control system default value method to set up.Concrete, comprise and gather fastener, analog quantity state monitoring module and time delay module.
Gather fastener and monitor from the sensor signal quality of digitizing instrument control system DCS, detect after signal fault, the output of analog quantity state monitoring module is set to " 1 ", after selecting module, is finally output as B.According to the die-away curve of hardwire analog quantity fault-signal, the value that a upper cycle collects not is " effective value last time " (value before fault), therefore be provided with time delay module, by time delay module interval, play time-lag action, guarantee the value that final output B is last useful signal.
Further, the time interval of time delay module is traditionally arranged to be 4 collection period.
When the present embodiment passes through judgement DCS Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal, can avoid " setting value " because of the signal fault disturbance that control is introduced to unit, by carrying out quickly and efficiently default value setting, realize the stable operation of unit.In addition, due to without hardware is changed, cost is less, obtains good technique effect.
Incorporated by reference to referring to Fig. 4, it is the schematic diagram of an embodiment of nuclear plant digital instrument control of the present invention system default value method to set up.The method to set up of aforementioned default value is equally applicable to network signal.For switching value signal, analog acquisition fastener in last embodiment can be replaced with to switch acquisition fastener, analog quantity state monitoring module replaces with on-off state monitoring modular, can realize the value that switching value signal default value is set to last useful signal.
Incorporated by reference to referring to Fig. 5, Fig. 5 provides nuclear plant digital instrument control of the present invention system default value that the schematic diagram of an embodiment of system is set, and it comprises: receiver module 501, judge module 503 and module 505 is set.Concrete,
Further, if the pad value of the hardwire analog signals that judge module 503 judgement receiver modules 501 receive gathers the Lower Range threshold value setting in advance in fastener lower than receiving end DCS, judge that hardwire analog signals is disablement signal.
Further, if when judge module 503 judgement receiver module 501 receiving end monitorings are communication failure, judgement network signal is disablement signal.
Further, module 505 is set and comprises: time delay submodule, time delay submodule is set to the value of last useful signal for the default value of digitizing instrument control system DCS signal.
Optionally, the time interval of time delay module is set to 4 collection period.
The implementation method of system and flow process can, referring to the embodiment of the method for introducing in previous embodiment, repeat no more herein.
In conjunction with above detailed description of the present invention, can find out, with respect to prior art, the present invention at least has following useful technique effect: during by judgement DCS Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal, can avoid " setting value " because of the signal fault disturbance that control is introduced to unit, by carrying out quickly and efficiently default value setting, realize the stable operation of unit.In addition, due to without hardware is changed, cost is less, obtains good technique effect.
According to above-mentioned principle, the present invention can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the present invention is not limited to embodiment disclosed and described above, to modifications and changes more of the present invention, also should fall in the protection domain of claim of the present invention.In addition,, although used some specific terms in this instructions, these terms just for convenience of description, do not form any restriction to the present invention.
Claims (10)
1. a nuclear plant digital instrument control system default value method to set up, is characterized in that, described method comprises:
Receive nuclear plant digital instrument control system DCS signal;
Judge that whether described digitizing instrument control system DCS signal is effective;
If during described Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal.
2. method according to claim 1, is characterized in that, describedly judges that whether described digitizing instrument control system DCS signal is effective, comprising:
If the pad value of the hardwire analog signals receiving gathers the Lower Range threshold value setting in advance in fastener lower than receiving end DCS, judge that described hardwire analog signals is disablement signal.
3. method according to claim 1, is characterized in that, describedly judges that whether described digitizing instrument control system DCS signal is effective, comprising:
If when receiving end monitoring is communication failure, judge that described network signal is disablement signal.
4. according to the method described in any one in claim 1-3, it is characterized in that, the default value of described digitizing instrument control system DCS signal is set to the value of last useful signal, comprising:
By the default value of time delay module digitizing instrument control system DCS signal, be set to the value of last useful signal.
5. method according to claim 4, is characterized in that, the time interval of described time delay module is set to 4 collection period.
6. nuclear plant digital instrument control system default value arranges a system, it is characterized in that, described system comprises:
Receiver module, for receiving nuclear plant digital instrument control system DCS signal;
Judge module, whether effective for judging described digitizing instrument control system DCS signal;
Module is set, if during for described Signal Fail, the default value of digitizing instrument control system DCS signal is set to the value of last useful signal.
7. system according to claim 6, is characterized in that, described judge module judges that whether described digitizing instrument control system DCS signal is effective, comprising:
If the pad value of the hardwire analog signals that described judge module judgement receiver module receives gathers the Lower Range threshold value setting in advance in fastener lower than receiving end DCS, judge that described hardwire analog signals is disablement signal.
8. system according to claim 6, is characterized in that, described judge module judges that whether described digitizing instrument control system DCS signal is effective, comprising:
If when described judge module judges described receiver module receiving end monitoring for communication failure, judge that described network signal is disablement signal.
9. according to the system described in any one in claim 6-8, it is characterized in that, the described module that arranges comprises:
Time delay submodule, is set to the value of last useful signal for the default value of digitizing instrument control system DCS signal.
10. system according to claim 9, is characterized in that, the time interval of described time delay module is set to 4 collection period.
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| CN105513659A (en) * | 2015-11-30 | 2016-04-20 | 中广核工程有限公司 | Output control method and system of nuclear power plant reactor protection system |
| CN106125721A (en) * | 2016-08-29 | 2016-11-16 | 许继集团有限公司 | DC control and protection system hardware switch amount input message processing method and device |
| CN106448776A (en) * | 2016-10-10 | 2017-02-22 | 中广核工程有限公司 | Nuclear power station default value setting system and method |
| CN108733021A (en) * | 2017-11-20 | 2018-11-02 | 江苏核电有限公司 | The method of the double AP failure risks dispersions of DCS system |
| CN109949645A (en) * | 2019-04-17 | 2019-06-28 | 广西防城港核电有限公司 | Nuclear power station DCS instrument control communication failure diagnostic method |
| CN111930006A (en) * | 2020-07-13 | 2020-11-13 | 中广核核电运营有限公司 | Method and computer equipment for determining default value of process quantity of control system |
| CN112468380A (en) * | 2020-11-30 | 2021-03-09 | 杭州和利时自动化有限公司 | Data screening method and device, electronic equipment and storage medium |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105513659A (en) * | 2015-11-30 | 2016-04-20 | 中广核工程有限公司 | Output control method and system of nuclear power plant reactor protection system |
| CN105513659B (en) * | 2015-11-30 | 2018-10-16 | 中广核工程有限公司 | A kind of output control method and system of nuclear power plant reactor protection system |
| CN106125721A (en) * | 2016-08-29 | 2016-11-16 | 许继集团有限公司 | DC control and protection system hardware switch amount input message processing method and device |
| CN106448776A (en) * | 2016-10-10 | 2017-02-22 | 中广核工程有限公司 | Nuclear power station default value setting system and method |
| CN106448776B (en) * | 2016-10-10 | 2018-06-15 | 中广核工程有限公司 | A kind of setting system and method for nuclear power station default value |
| CN108733021A (en) * | 2017-11-20 | 2018-11-02 | 江苏核电有限公司 | The method of the double AP failure risks dispersions of DCS system |
| CN109949645A (en) * | 2019-04-17 | 2019-06-28 | 广西防城港核电有限公司 | Nuclear power station DCS instrument control communication failure diagnostic method |
| CN111930006A (en) * | 2020-07-13 | 2020-11-13 | 中广核核电运营有限公司 | Method and computer equipment for determining default value of process quantity of control system |
| CN112468380A (en) * | 2020-11-30 | 2021-03-09 | 杭州和利时自动化有限公司 | Data screening method and device, electronic equipment and storage medium |
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