CN106227191A - A kind of thermal power generation unit Control platform alarming method by monitoring - Google Patents
A kind of thermal power generation unit Control platform alarming method by monitoring Download PDFInfo
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- CN106227191A CN106227191A CN201610669922.0A CN201610669922A CN106227191A CN 106227191 A CN106227191 A CN 106227191A CN 201610669922 A CN201610669922 A CN 201610669922A CN 106227191 A CN106227191 A CN 106227191A
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- regulated variable
- control system
- control
- value
- control platform
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
- G05B23/0264—Control of logging system, e.g. decision on which data to store; time-stamping measurements
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24065—Real time diagnostics
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Alarm Systems (AREA)
Abstract
The invention discloses a kind of thermal power generation unit Control platform alarming method by monitoring, determine regulated variable according to the type of control system, determine control system performance indications permissible value；Wherein, when disturbance occurs; real-time reception regulated variable generates step response curve; by calculating the positive and negative of regulated variable transient process attenuation rate, it is judged that determine that regulated variable is convergence or dissipates, when regulated variable is to dissipate; trigger protection is reported to the police; when system control be convergence time, calculate further and judge control system index whether beyond permissible value, if beyond permissible value, triggering quality is reported to the police.The present invention is relative to the Control platform salvo of traditional " setting value and actual value deviation switch to greatly manual control mode "; for Control platform itself; if Control platform transmitting case occurs, can report to the police with regard to trigger protection at the transient process initial stage, thus prevent Control platform from deteriorating further.
Description
Technical field
The invention belongs to industrial stokehold technical field, particularly to a kind of thermal power generation unit Control platform monitoring report
Alarm method, can be with real-time inspection and control system Control platform, calculating control system performance indications, by automatic system is controlled product
Matter real-time judge, once monitors Control platform transmitting case and alarm.
Background technology
The protective measure of the Control platform difference for automatically controlling in thermal power generation unit Thermal Control System at present, mainly
It is manually to solve by switching to setting value is big with actual value deviation when.It is not directed to automatic Control Quality originally
Body carries out direct analyzing and diagnosing, occurs that Control platform dissipates for some control system, and the most only these a kind of means, do not exist
Quality comparison trend is just judged by the control system transient process change initial stage, it is impossible to find that Control platform deteriorates in time.Existing
The protection having automatic control system is reported to the police, and is the most still conceived to the interlock protection of systematic parameter.And for the guarantor of Control platform
Protect, the most only the protective measure of " setting value and actual value deviation switch to greatly manual control mode ".In actual production, past
Toward due to the unsuitable too small restriction of deviation definite value, when Control platform occurs that deterioration, Control platform dissipate, easily occur that protection is cut
Except not in time, to be cut manual time regulated variable big ups and downs have occurred, bring adverse effect to system is properly functioning.
Additionally for the analog quantity automatic control system of unit, at present, power plant's aspect can only be by periodically carrying out disturbance examination
Test, the problem that Control platform exists could be found, find and optimization cycle is long.If control system is the best at regulation Control platform
In the case of run, performance driving economy and safety to unit will bring adverse effect and potential risk.
Summary of the invention
Object of the present invention is to provide a kind of thermal power generation unit Control platform alarming method by monitoring, by automatically
The real-time monitoring of control system Control platform, it can be determined that the setting value perturbation process occurred in actual moving process, by right
The real-time monitoring of process data, calculates Control platform performance indications in real time.And can be at the transient process initial stage, it is judged that Control platform is
No occur dissipating, and once finds that Control platform deteriorates, and timely trigger protection is reported to the police.By calculating attenuation rate, overshoot, tune in real time
The Control performance standards such as joint time, and combine actual index request Control platform is carried out Real-Time Evaluation, when Control platform is discontented with
During the foot related request such as code can and alarm, and provide control parameter adjustment foundation for thermal technology personnel, thus ensure control
The long-term Effec-tive Function of system processed.
To achieve these goals, the technical scheme is that
A kind of thermal power generation unit Control platform alarming method by monitoring, determines regulated variable according to the type of control system, determines control
System performance index permissible value processed；Wherein, when disturbance occurs, real-time reception regulated variable generates step response curve, by meter
Calculate the positive and negative of regulated variable transient process attenuation rate, it is judged that determine that regulated variable is convergence or dissipates, when regulated variable is to dissipate, touch
Send out protection report to the police, when system control be convergence time, calculate further and judge control system index whether beyond permissible value,
If beyond permissible value, triggering quality is reported to the police.
Scheme is further: described judgement determines that regulated variable is convergence or the process that dissipates is: go out to open now from disturbance
Begin to determine the first peak value P1 and the second peak value P2 that first step response curve occurs, calculate attenuation rate S=(P1-P2) ÷ P1,
If S ＜ 0, for dissipating, trigger protection warning system, if S ＞ 0, for convergence.
Scheme is further: the sampling process of described first peak value and the second peak value is: change detection curve is adjusted in real time
Numerical quantity, " current time regulated variable subtracts a upper moment regulated variable > 0 " i.e. can determine whether that regulated variable constantly raises；When occurring " time current
Carve regulated variable subtract a upper moment regulated variable < 0 " the first peak value can be judged as, and record its numerical value and moment；
Continue " current time regulated variable subtract a upper moment regulated variable < 0 " and i.e. can determine whether that regulated variable constantly reduces；" current when occurring
Moment regulated variable subtracts a upper moment regulated variable > 0 " the first trough can be judged as, and record its numerical value and moment；
Continue " current time regulated variable subtracts a upper moment regulated variable > 0 " i.e. can determine whether that regulated variable constantly raises；" current when occurring
Moment regulated variable subtract a upper moment regulated variable < 0 " the second peak value can be judged as, and record its numerical value and moment.
Scheme is further: the described type according to control system determines that regulated variable includes: the drum of feed water control system
Water level, the main steam temperature of main steam temperature system, the reheat steam temperature of reheat steam temperature control system, combustion chamber draft control
The furnace pressure of system processed, the blast/differential pressure of air quantity control system, the primary air pressure of primary air pressure control system, coal pulverizer one
The coal pulverizer inlet First air flow of secondary air quantity control system, the pulverizer outlet temperature of pulverizer outlet temperature control system,
The coal pulverizer inlet blast of coal pulverizer inlet wind pressure control system；Described control system performance indications include: when overshoot, regulation
Between and attenuation rate.
Scheme is further: described protection warning is to trigger buzzer and will automatically control and switch to Non-follow control, described
It is to trigger alarm lamp output control system performance indications that quality is reported to the police, and described control system performance indications include the permission set
It is worth and beyond value.
The present invention passes through on-line monitoring calculating control system quality parameter index, on the one hand can find control product in time
Matter deteriorates, and changes the initial stage in control system transient process, it is judged that whether Control platform dissipates, and alarm switches to manual shape
State；On the other hand it is unsatisfactory for relevant regulatory requirements, to unit long-term safety warp when Control platform does not dissipate still performance indications
There is adverse effect in Ji operation, also can pass through the online meter of Control platform attenuation rate, regulating time, overshoot related performance indicators
Calculate and alarm reflects, and then instruct thermal technology personnel to adjust control parameter in time, and then guarantee that control system can be long-term
Effec-tive Function.By to automatic controlling system quality real-time judge, once monitor Control platform and dissipate or every property
Can index be unsatisfactory for setting requirement and alarm.Thermal technology personnel can find that Control platform deteriorates or Con trolling index is discontented with in time
Foot regulatory requirements, simultaneously Control platform performance indications also for thermal technology personnel to control parameter in time optimize and revise proposition data depend on
According to, and then Guarantee control system can Effec-tive Function for a long time.Compared with prior art, the invention have the advantages that
1) present invention protects relative to the Control platform of traditional " setting value and actual value deviation switch to greatly manual control mode "
Handguard section, for Control platform itself, if Control platform transmitting case occurs, can be at the transient process initial stage with regard to trigger protection report
Alert, thus prevent Control platform from deteriorating further.
2) by On-line Control index of quality calculation procedure, the process of setting value step disturbance each time can be calculated in real time,
Control performance standard: overshoot, regulating time, attenuation rate.In real time Control platform is carried out in conjunction with relevant code and production reality
Evaluate, trigger when being unsatisfactory for related request and report to the police, thus the timely further optimization for controller parameter, and join for relevant
Number adjusts provides performance indications data foundation.
With embodiment, invention is described in detail below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is the inventive method flow chart；
Fig. 2 is convergence type disturbance curve；
Fig. 3 is divergence form disturbance curve.
Detailed description of the invention
A kind of Control platform alarming method by monitoring, determines regulated variable according to the type of control system, determines that control system performance refers to
Mark permissible value；Wherein, when disturbance occurs, real-time reception regulated variable generates step response curve (regulated variable change curve), makees
Judge for control system convergence or the volume that dissipates, generally calculate the change between two continuous peak values and be assured that becoming of entirety
Gesture.The most in the method, with two the continuous peak values first occurred, decline by calculating regulated variable transient process (change curve)
Lapse rate positive and negative, it is judged that determining that regulated variable is convergence or dissipates, when regulated variable is to dissipate, trigger protection is reported to the police, when system control
System be convergence time, calculate further and judge control system index whether beyond permissible value, if beyond permissible value,
Triggering quality is reported to the police；
Described judgement determines that regulated variable is that the process restraining or dissipating is: go out to start now from disturbance to determine step response curve
The the first peak value P1 occurred and the second peak value P2, calculates attenuation rate S=(P1-P2) ÷ P1, if S ＜ 0, for dissipating, trigger protection
Warning system, if S ＞ 0, for convergence, if S=0, continues to take off a peak value and carries out calculating as P2 and compare.Fig. 2 illustrates that
Convergence type disturbance curve, Fig. 3 illustrates that divergence form disturbance curve.
In embodiment: the sampling process of described first peak value and the second peak value is: change detection curve regulated variable number in real time
Value, " current time regulated variable subtracts a upper moment regulated variable > 0 " i.e. can determine whether that regulated variable constantly raises；When " current time quilt occurs
Tune amount subtract a upper moment regulated variable < 0 " the first peak value can be judged as, and record its numerical value and moment；
Continue " current time regulated variable subtract a upper moment regulated variable < 0 " and i.e. can determine whether that regulated variable constantly reduces；" current when occurring
Moment regulated variable subtracts a upper moment regulated variable > 0 " the first trough can be judged as, and record its numerical value and moment；
Continue " current time regulated variable subtracts a upper moment regulated variable > 0 " i.e. can determine whether that regulated variable constantly raises；" current when occurring
Moment regulated variable subtract a upper moment regulated variable < 0 " the second peak value can be judged as, and record its numerical value and moment.
In embodiment: the described type according to control system determines that regulated variable includes: the steam water-level of feed water control system,
The main steam temperature of main steam temperature system, the reheat steam temperature of reheat steam temperature control system, hearth vacuum control system
The furnace pressure of system, the blast/differential pressure of air quantity control system, the primary air pressure of primary air pressure control system, coal pulverizer First air
The coal pulverizer inlet First air flow of amount control system, the pulverizer outlet temperature of pulverizer outlet temperature control system, coal-grinding
The coal pulverizer inlet blast of machine entrance wind pressure control system；Described control system performance indications include: overshoot, regulating time and
Attenuation rate.
Concrete permissible value sets as shown in the table:
Meaning that as a example by hearth vacuum control system in upper table, needing the control parameter gathered, namely regulated variable is stove
Gun pressure power, when disturbance occurs, more than 300MW grade, when disturbance quantity be ± 150Pa time, overshoot permissible value is ＜ 30Pa, surely
Determining the ＜ 1min that regulating time permissible value is, attenuation rate scope permissible value is 0.75-0.9；Other is by that analogy.
Attenuation rate described in embodiment is to weigh the index of attenuation degree of an oscillatory process, and it is adjacent equal to two
The ratio of crest value in the same direction.
Overshoot described in embodiment refers in setting value step response, and transient process starts rear first crest and exceedes it
The amplitude of new steady-state value, is the measurement index of the dynamic accuracy of control system.
Regulating time described in embodiment is the time needed for transient process start to finish, it is considered that work as regulated variable
In the range of having been enter into the 5% of its steady-state value, even if transient process is over.It it is the index of measurement system rapidity.
Upper table be according to " DL/T 657-2006 thermal power plant analog control system Acceptance Test code " for
More than 300MW fired power generating unit analog quantity automatic control system performance indications requirement.In scene, thermal technology personnel can basis
Relevant code and unit practical operation situation arrange reference value to automatic control system.
In embodiment: described protection warning is to trigger buzzer and will automatically control and switch to Non-follow control, described quality
Warning is to trigger alarm lamp output control system performance indications (regulated variable parameter value), and described control system performance indications include
Permissible value and beyond value.
Accompanying drawing 1 illustrates the flow process of this method, wherein:
The first step, thermal technology personnel are according to relevant code and produce actual set control system performance indications reference value；
Second step: the setting value step disturbance that monitor control system occurs；
3rd step: once detect that transient process proceeds by Control platform and monitors in real time；
4th step: judge and calculate first peak value that regulated variable occurs, first valley and second peak value；
5th step: calculate step disturbance process attenuation rate；Attenuation rate ＜ 0 Control platform dissipates the convergence of attenuation rate ＞ 0 Control platform；
6th step: if dissipating triggering alarm and protection signal；If convergence continues ask for overshoot, regulating time and preserve collection；
7th step: performance indications compare with the reference value of thermal technology's personnel setting, and then Control platform is evaluated, if being unsatisfactory for
Require to trigger and report to the police.
The present embodiment is by calculating the Control performance standards such as mark attenuation rate, overshoot, regulating time in real time, and combines reality
Index request carries out Real-Time Evaluation to Control platform, be unsatisfactory for when Control platform the related requests such as code can and alarm, and
And provide control parameter adjustment foundation, thus the long-term Effec-tive Function of Guarantee control system for thermal technology personnel.
Claims (5)
1. a thermal power generation unit Control platform alarming method by monitoring, determines regulated variable according to the type of control system, determines
Control system performance indications permissible value；It is characterized in that, when disturbance occurs, it is bent that real-time reception regulated variable generates step response
Line, by calculating the positive and negative of regulated variable transient process attenuation rate, it is judged that determines that regulated variable is convergence or dissipates, when regulated variable is
When dissipating, trigger protection is reported to the police, and when system control is convergence, calculates further and judges whether control system index exceeds
Permissible value, if beyond permissible value, triggering quality is reported to the police.
Control platform alarming method by monitoring the most according to claim 1, it is characterised in that described judgement determines that regulated variable is
Convergence or the process that dissipates be: go out to start now to determine the first peak value P1 that first step response curve occurs and the from disturbance
Two peak value P2, calculate attenuation rate S=(P1-P2) ÷ P1, if S ＜ 0, for dissipating, trigger protection warning system, if S ＞ 0, be
Convergence.
Control platform alarming method by monitoring the most according to claim 2, it is characterised in that described first peak value and the second peak
The sampling process of value is: change detection curve regulated variable numerical value in real time, " current time regulated variable subtracts a upper moment regulated variable > 0 "
I.e. can determine whether that regulated variable constantly raises；When occurring that " current time regulated variable subtract a upper moment regulated variable < 0 " can be judged as first
Peak value, and record its numerical value and moment；
Continue " current time regulated variable subtract a upper moment regulated variable < 0 " and i.e. can determine whether that regulated variable constantly reduces；" current when occurring
Moment regulated variable subtracts a upper moment regulated variable > 0 " the first trough can be judged as, and record its numerical value and moment；
Continue " current time regulated variable subtracts a upper moment regulated variable > 0 " i.e. can determine whether that regulated variable constantly raises；" current when occurring
Moment regulated variable subtract a upper moment regulated variable < 0 " the second peak value can be judged as, and record its numerical value and moment.
Control platform alarming method by monitoring the most according to claim 1, it is characterised in that the described class according to control system
Type determines that regulated variable includes: the steam water-level of feed water control system, the main steam temperature of main steam temperature system, reheated steam temperature
Degree the reheat steam temperature of control system, the furnace pressure of hearth vacuum control system, the blast/differential pressure of air quantity control system,
The primary air pressure of primary air pressure control system, the coal pulverizer inlet First air flow of pulverizer' s primary air flow control system, coal-grinding
The pulverizer outlet temperature of machine outlet temperature control system, the coal pulverizer inlet blast of coal pulverizer inlet wind pressure control system；Institute
State control system performance indications to include: overshoot, regulating time and attenuation rate.
Control platform alarming method by monitoring the most according to claim 1, it is characterised in that it is to trigger honeybee that described protection is reported to the police
Ring device also will automatically control and switch to Non-follow control, and the warning of described quality is triggering alarm lamp and output control system performance refers to
Mark, described control system performance indications include the permissible value set and beyond value.
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| CN201610669922.0A CN106227191A (en) | 2016-08-15 | 2016-08-15 | A kind of thermal power generation unit Control platform alarming method by monitoring |
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| CN201610669922.0A CN106227191A (en) | 2016-08-15 | 2016-08-15 | A kind of thermal power generation unit Control platform alarming method by monitoring |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108073160A (en) * | 2017-12-27 | 2018-05-25 | 中国大唐集团科学技术研究院有限公司西北分公司 | Thermoelectricity factory owner, the method for early warning of reheat steam temperature rapid decrease |
| CN111308989A (en) * | 2020-03-12 | 2020-06-19 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Automatic regulating quality testing system and method for analog quantity control system |
| CN113902246A (en) * | 2021-08-31 | 2022-01-07 | 华电电力科学研究院有限公司 | Coal-fired unit thermal process control online intelligent analysis and diagnosis method |
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| CN108073160A (en) * | 2017-12-27 | 2018-05-25 | 中国大唐集团科学技术研究院有限公司西北分公司 | Thermoelectricity factory owner, the method for early warning of reheat steam temperature rapid decrease |
| CN111308989A (en) * | 2020-03-12 | 2020-06-19 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Automatic regulating quality testing system and method for analog quantity control system |
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