CN102722156B - Method for displaying fault of control system and controlling fault tolerance in production process of metallurgy industry - Google Patents
Method for displaying fault of control system and controlling fault tolerance in production process of metallurgy industry Download PDFInfo
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- CN102722156B CN102722156B CN201210207017.5A CN201210207017A CN102722156B CN 102722156 B CN102722156 B CN 102722156B CN 201210207017 A CN201210207017 A CN 201210207017A CN 102722156 B CN102722156 B CN 102722156B
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Abstract
The invention discloses a method for displaying the fault of a control system and controlling the fault tolerance in a production process of a metallurgy industry. The method is characterized by comprising the following steps of: 1) analyzing an exception or fault signals in working state parameters obtained by the control system in the production process of the metallurgy industry, obtaining fault reasons, and forming a metallurgy system fault tree by using the system exception as a top event and various fault reasons as bottom events; 2) enabling the fault reasons obtained in the step 1 to be corresponding to the metallurgy system fault tree, dynamically displaying the fault reasons on the metallurgy system fault tree in a photon brand way, showing fault signals and the fault reasons on the metallurgy system fault tree, and displaying the working condition of the metallurgy system; and 3) establishing a control method corresponding to specific fault reasons, establishing an expert knowledge database, searching the expert knowledge database if a fault is diagnosed, finding out the control method corresponding to the specific fault reasons, and controlling the fault tolerance. The method disclosed by the invention has the advantages that the safety and the reliability of the control system in the metallurgy industry can be increased.
Description
Technical field
The present invention relates to a kind of metallurgy industry automatic control system fault and show and fault tolerant control method, particularly relate to working state of system monitoring, fault diagnosis and pattern-recognition and fault tolerant control method, belong to industrial control technology field.
Background technology
Metallurgical Industry is produced the 160kA-500kA direct current that rectifier need be provided and is passed into electrolytic tank, at 950 DEG C-970 DEG C, electrochemical reaction occurs.Therefore power-supply rectifying and electrolytic tank control are two large important system of metallurgical production, and the industries process control system of metallurgy industry is mainly divided into rectifier automated system, electrolysis cell control system, low pressure adapted electric system etc.These monitorings, supervisory system and the communication system that use are at present all the separate operations in each workshop that is dispersed in metallurgical works, and main or computer acquisition monitors, manually-operated production model.Particularly commutation supply voltage and the large link of electrolytic tank control two, still links up and operates on duty as main taking on-the-spot person to person's phone, fail truly to realize the unified management of production information, information island phenomenon ubiquity.In general, if metallurgical production run supervision and level of control can not get effective lifting, once because of forced outage or stop groove and will make manufacturing enterprise suffer huge economic loss and energy dissipation.
For the defect existing in current metallurgical production process, be accident for avoiding development of defects, fault spread is major accident, thereby reduces loss, the security that improves whole metallurgical system is particularly important.Therefore can carry out on-line identification and analysis, intelligent decision and alarm, volitional check control and processing, protect the processing procedures such as action parameter information and phenomenon in the urgent need to one; accident is effectively controlled and limits, at utmost realize zone isolation and the exploded of accident; each link and flow process form the fault-tolerant control system of closed loop; need in time system operation situation to be fed back to operator simultaneously, can extend efficient help for fault handling.
Summary of the invention
Technical matters to be solved by this invention is to provide condition monitoring, fault reasoning and the fault tolerant control method in a kind of accurate, safe and reliable metallurgy industry industries process control system.
For solving the problems of the technologies described above, the invention provides a kind of metallurgy industry industries process control system fault and show and fault tolerant control method, it is characterized in that, comprise the following steps:
1) the abnormal or fault-signal in working status parameter metallurgy industry industries process control system being obtained is analyzed, and obtains failure cause, and taking system exception as top event, various failure cause is that bottom event forms metallurgical system fault tree;
2) failure cause obtaining in step 1) is corresponding with metallurgical system fault tree, be dynamically presented on metallurgical system fault tree with the form of photon board, on metallurgical system fault tree, show fault-signal and failure cause, show metallurgical system working condition;
3) for concrete failure message, formulate the control method corresponding with concrete failure cause, and set up expert knowledge library, in step 2) if in diagnose out have fault occur, retrieve expert knowledge library, find out the control method corresponding with concrete failure cause, carry out fault-tolerant control, reduce fault the impact on system occurs, improve the reliability of system works.
Aforesaid metallurgy industry industries process control system fault shows and fault tolerant control method, it is characterized in that: in described step 1), whole metallurgy industry industries process control system is divided into: water-cooling system, pressure regulation become cooling system, rectification becomes cooling system, commutation system, unit group steady flow system and the total adjusting system of current stabilization, and taking this subsystem as intermediate event, progressively expand fault tree, finally form taking system exception as top event, various failure cause is the fault Tree of bottom event.
Aforesaid metallurgy industry industries process control system fault shows and fault tolerant control method, it is characterized in that: in described step 2) in, fault tree and fault diagnosis result are formed to corresponding relation, diagnostic result is presented on fault tree, be shown as dynamic interface with fault tree form, and on interface, point out fault handling measure, for fault diagnosis and dealing provides convenient.
Aforesaid metallurgy industry industries process control system fault shows and fault tolerant control method; it is characterized in that: in described step 3); under the prerequisite of the normal operation of guarantee equipment, adopt the control method of abnormal unit limited load, normal unit load up, and make total output load constant.
Aforesaid metallurgy industry industries process control system fault shows and fault tolerant control method, it is characterized in that: concrete control method is: concrete control method is: normally move under prerequisite at guarantee equipment, when after the abnormal generation of unit, the enable signal of selector switch puts 1, abnormal unit is switched to a point key joint pattern by total key joint pattern, separately abnormal unit is regulated by central control room, and the abnormal limit amount passage different according to different control word gatings, limit the electric current output of abnormal unit, operator inputs abnormal unit electric current by interface and exports to definite value Iref, if current value output exceedes this Indexes Abnormality upper control limit value Irefmax, electric current is exported to definite value and is set as abnormal upper control limit value Irefmax, otherwise unit rectification output valve is the electric current of interface input exports to definite value Iref, in the time that enable signal sets to 0, this unit participates in total key joint pattern, this unit electric current is exported given higher limit for total given value of current value of adjusting, and regulate and control the output of unit group electric current by the PID of little closed loop control mode.
The beneficial effect that the present invention reaches: metallurgy industry industries process control system fault of the present invention shows and fault tolerant control method, by parameter information and phenomenon are carried out to on-line identification and analysis, intelligent decision and alarm, volitional check control and processing, the processing procedures such as protection action, accident is effectively controlled and limits, at utmost realize zone isolation and the exploded of accident, each link and flow process form the fault-tolerant control system of closed loop, improve the security of metallurgy industry control system, reliability, and the result of inline diagnosis is passed through to fault tree Dynamic Display, for operator grasps working state of system and fault handling is offered help in time.
Brief description of the drawings
Fig. 1 is metallurgy industry industries process control system block diagram of the present invention;
Fig. 2 is water circulation abnormal failure tree of the present invention;
Fig. 3 is power fail exploded view of the present invention;
Fig. 4 is blower fan of the present invention, Pump Fault Diagnosis figure;
Fig. 5 is the wrong expert knowledge library of controlling of the total capacity transfer of current stabilization of the present invention;
Fig. 6 is the wrong expert knowledge library of controlling of the abnormal machine component of the present invention capacity transfer.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.
As seen from Figure 1, the demonstration of metallurgy industry industries process control system fault and fault tolerant control method are mainly divided into fault diagnosis, fault is shown and 3 steps of fault-tolerant control.The working state of system parameter that Central Control Room is obtained is analyzed, the fault diagnosis functions of completion system.The information if diagnosis is out of order, and by bright photon pip corresponding thereto, and show on fault tree, receive rope expert knowledge library for different failure messages, take different fault-tolerant control strategies, to fault report to the police, limited load, excision unit or series tripping operation process.
Water circulation abnormal failure tree from Fig. 2 can be found out, high taking hydraulic pressure in water circulation system, hydraulic pressure is low, current are low, water temperature is high, swelling water tank water level is low, water temperature is low and pure water conductivity is high progressively expands as intermediate event, searching causes abnormal reason, open fault, electric voltage exception etc. and analyze as bottom event taking electric power loop broken string, sky, finally obtain water circulation abnormal failure tree.
Fig. 3 dynamically shows failure message, after fault occurs, corresponding photon board is bright, just can show intuitively various malfunctions and failure cause, utilize input voltage value to judge and obtain electric voltage exception, after this situation occurs, can cause input power fault, blower and water pump power fail, and cause thus that water temperature is high and current are low, thereby cause that water circulation is abnormal, the photon board of relevant fault-signal and failure cause is lit, and can show the prompting of " please check general supply " at bottom event place, can handled easily person hold in time failure cause, effectively take measures to avoid causing heavy losses because of fault.
Fig. 4 is the fault diagnosis of blower and water pump system, eliminate impact and the erroneous judgement of external interference by time delay, first judge whether power down of power supply according to power supply signal, and then judge whether fault of body according to the duty of blower and water pump body, and take different fault-tolerant control according to failure message, as throw for subsequent use, report to the police and cut unit.
Metallurgical control system adopts the control model of " little closed loop+large closed loop ", and little closed loop realizes the given output of unit group, and the total output of the true existing system of large closed loop is constant.Can find out from the wrong expert knowledge library of controlling of the total capacity transfer of Fig. 5 current stabilization; the measured value that the total set-point of electric current deducts abnormal unit obtains total current value set-point of adjusting; and reduce error by a feedforward; always assign definite value to obtain normal unit group given value of current value divided by total unit number of adjusting; unit group regulates the output of bonding set steady by the PID of little closed loop control mode, and large closed-loop control pattern ensures that the total output of system is constant.
Fig. 6 is the abnormal fault-tolerant control strategy of unit group, when unit occurs that water temperature is high, element busbar temperature is high, when fast molten bad 1 and low power overload etc. are abnormal, according to different situations, normally move under prerequisite at guarantee equipment, when after the abnormal generation of unit, the enable signal of selector switch puts 1, and the passage different according to different control word gatings, limit the electric current output of abnormal unit, can input abnormal unit given value of current value by interface, if exceed higher limit, export to and be decided to be higher limit, otherwise be output as input current set-point, in the time enabling to be 0, this unit participates in total tune, export-restriction value is for always assigning definite value, and regulate the output of bonding unit current stabilization by little closed loop control mode PID.
Claims (3)
1. metallurgy industry industries process control system fault is shown and a fault tolerant control method, it is characterized in that, comprises the following steps:
1) the abnormal or fault-signal in working status parameter metallurgy industry industries process control system being obtained is analyzed, and obtains failure cause, and taking system exception as top event, various failure cause is that bottom event forms metallurgical system fault tree;
2) failure cause obtaining in step 1) is corresponding with metallurgical system fault tree, be dynamically presented on metallurgical system fault tree with the form of photon board, on metallurgical system fault tree, show fault-signal and failure cause, show metallurgical system working condition;
3) for concrete failure message, formulate the control method corresponding with concrete failure cause, and set up expert knowledge library, in step 2) if in diagnose out have fault occur, retrieve expert knowledge library, find out the control method corresponding with concrete failure cause, carry out fault-tolerant control, under the prerequisite of the normal operation of guarantee equipment, adopt abnormal unit limited load, the control method of normal unit load up, and make total output load constant, concrete control method is: normally move under prerequisite at guarantee equipment, when after the abnormal generation of unit, the enable signal of selector switch puts 1, abnormal unit is switched to a point key joint pattern by total key joint pattern, separately abnormal unit is regulated by central control room, and the abnormal limit amount passage different according to different control word gatings, limit the electric current output of abnormal unit, operator inputs abnormal unit electric current by interface and exports to definite value Iref, if actual current output valve exceedes this Indexes Abnormality upper control limit value Irefmax, electric current is exported to definite value and is set as abnormal upper control limit value Irefmax, otherwise unit rectification output valve is the electric current of interface input exports to definite value Iref, in the time that enable signal sets to 0, this unit participates in total key joint pattern, this unit electric current is exported given higher limit for total given value of current value of adjusting, and regulate and control the output of unit group electric current by the PID of little closed loop control mode.
2. metallurgy industry industries process control system fault according to claim 1 shows and fault tolerant control method, it is characterized in that: in described step 1), whole metallurgy industry industries process control system is divided into: water-cooling system, pressure regulation become cooling system, rectification becomes cooling system, commutation system, unit group steady flow system and the total adjusting system of current stabilization, and taking this subsystem as intermediate event, progressively expand fault tree, finally form taking system exception as top event, various failure cause is the metallurgical system fault tree of bottom event.
3. metallurgy industry industries process control system fault according to claim 1 shows and fault tolerant control method, it is characterized in that: in described step 2) in, fault tree and fault diagnosis result are formed to corresponding relation, diagnostic result is presented on fault tree, be shown as dynamic interface with fault tree form, and on interface, point out fault handling measure.
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| CN102968113A (en) * | 2012-11-16 | 2013-03-13 | 国电南瑞科技股份有限公司 | Failure analysis and exhibition method of power generator excitation system |
| CN103678929A (en) * | 2013-12-23 | 2014-03-26 | 中国能源建设集团广东省电力设计研究院 | Method and system for detecting reliability of submarine power cable |
| CN107037802B (en) * | 2016-10-28 | 2018-01-26 | 华中科技大学 | A kind of method for detecting abnormality of Process Control System protecting information safety |
| CN107563639B (en) * | 2017-08-31 | 2021-03-12 | 中国农业银行股份有限公司 | Information system risk assessment device and method based on fault tree |
| EP3579074B1 (en) * | 2018-06-07 | 2021-01-06 | Siemens Aktiengesellschaft | Computer-implemented method and device for resolving closed loops in automatic fault tree analysis of a multi-component system |
| CN114593104B (en) * | 2022-02-17 | 2023-03-14 | 成都飞机工业（集团）有限责任公司 | Method for decomposing and checking problem of abnormal pressure output by servo valve |
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Owner name: NARI NANJING CONTROL SYSTEM LTD. Effective date: 20141205 |
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Effective date of registration: 20141205 Address after: High road high tech Development Zone Nanjing city Jiangsu province 210061 No. 20 Patentee after: NARI Technology Development Co., Ltd. Patentee after: SGCC NARI Nanjing Control System Co., Ltd. Address before: High road high tech Development Zone Nanjing city Jiangsu province 210061 No. 20 Patentee before: NARI Technology Development Co., Ltd. |