CN110309585A - A kind of implementation method of flexibility tuning controller - Google Patents
A kind of implementation method of flexibility tuning controller Download PDFInfo
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Abstract
The invention discloses a kind of implementation methods of flexible tuning controller, the present invention is based on drum wall metal temperatures, cylinder of steam turbine temperature, big machine enabling rate, Important Auxiliary equipment power output, the different load stage (deep to adjust), main steam temperature rate of change, pressure divergence is in allowed band, the optimization algorithm of the excessively low many unit parameters of exhaust gas temperature can be calculated dynamically in real time and fit the optimal variable load rate and transformation rate demand function model of unit, module is applied directly in the Changing load-acceleration of tuning controller and the control logic of pressure changeable rate by the signal issued, and then it is directly changed generating set varying duty intensity, act on unit fuel quantity, confluent, in the dynamically load of wind coal proportion, realize the safety of unit lifting load and the balance of regulation performance, realize that multi-parameter ginseng control calculates fuel.And by the algorithm of optimization, coal, water, wind and mutual relationship needed for calculating bottom are gone with controller parameter, disturbance between system is made to tend to balance.
Description
Technical field
The invention belongs to thermal power generation automated control technology, in particular to a kind of realization side of flexible tuning controller
Method.
Background technique
Coordinated control is the most important control loop in thermal power plant, is responsible for the most important control function of unit, real
Existing unit boiler side and steamer pusher side go out dynamic balance, the task of material balance and energy balance, while after being also set grid-connection
The basis of Automatic Generation Control (AGC) and primary frequency function.So the index of tuning controller (control loop) directly affects
The stabilization of mains frequency and the stability of unit, economy, the feature of environmental protection are even determined to a certain degree.
The Changing load-acceleration in the tuning controller of fired power generating unit and pressure changeable rate are all the settings of fixed number value at present, or
The hard handover circuit of different demands is the constant speed rate that operations staff sets according to operating standard or empirical value, by this behaviour
The control mode for making method is intended merely to meet the primary demand of varying duty, this is a kind of relatively rough and stiff control mode,
This numerical value is not optimal rate under many operating conditions, can safety to unit, flexibility, economy, the feature of environmental protection make
At certain sacrifice, whether rate is suitable, and can directly affect unit up to standard to power grid demand, also directly determines that unit is transported
Whether potential uses the economic performance of reasonable unit when row.So in the safety of generating set, flexibility, economy, ring
Guarantor property requires under higher and higher overall situation, and the technology of unit related performance indicators is promoted by transformation to unit and optimization
Realization just have important practical significance.
Center of the invention, which is intended that, designs a kind of elastic Changing load-acceleration based on coordinated control system and elastic transformation
The intelligent control setting device of power rate.The controller is based on drum wall metal temperature, cylinder of steam turbine temperature, big machine enabling speed
Rate, Important Auxiliary equipment power output, different load stage (deep to adjust), main steam temperature rate of change, pressure divergence are in allowed band, smoke evacuation
The algorithm of influence of the excessively low factor of temperature to unit Changing load-acceleration and pressure changeable rate is replaced original with the variable Rate of elasticity
Hard handover rate logic realizes the calculating of multi-parameter ginseng control fuel.The controller that the present invention designs can the current machine of effective solution
Group coordinated control mode manually sets variable load rate bring and controls rough problem, can also the current numerous power plant of effective solution
AGC examination, environmental protection are examined under problem and depth peak regulation operating condition not up to standard, as Changing load-acceleration setting it is bad caused by examine
Rewards and punishments problem, while can be improved the safety, flexibility, economy, the feature of environmental protection of unit.
State time generator group there is no setting for the Coordinated Control Scheme system based on elastic Changing load-acceleration and pressure changeable at present
Meter, the present invention are in the case where the great market demand to the wound in terms of the control strategy of unit cooperative characteristic dynamic adjustment
Newly.
Summary of the invention
Of the invention is to overcome the above-mentioned prior art insufficient, provides a kind of realization of flexible tuning controller, specific real
Shown in existing process following steps:
Step 1, application machine set system signal is received, unit safety threshold calculation and performance threshold calculation are established.This
It includes that drum wall metal temperature, cylinder of steam turbine temperature, steam turbine pitch open rate, important auxiliary that controller, which receives unit signal,
Machine power output, different load stage (deep to adjust), main steam temperature rate of change, pressure divergence are too low in allowed band, exhaust gas temperature
Deng.By the marginal condition algorithm in threshold calculation area as shown in Fig. 2, unit variable load rate demand valves under this condition are calculated
Value, which is sent to next step optimizing intelligent screening device, is replaced original hard handover rate logic with the variable Rate of elasticity, is realized
The more marginal conditions ginseng controls of multi-parameter calculate Changing load-acceleration and pressure changeable rate；
Step 2, it establishes and editorial intelligence optimizing algorithm, using shown in on-line intelligence analyzer optimizing algorithm area, by right
The inner each algorithmic function of step 1 searches out in line computation, intelligent optimizing optimal parameter and reaches marginal condition in all algorithm devices
Domain bottom valve value specific algorithm rule is shown in that attached drawing 3, the optimal Changing load-acceleration and pressure changeable rate of generation send defeated to next step interface
Out, it sets to coordinated control system；
Step 3, control unit interface of the present invention is located at unit DCS (power plant dispersion centralized control) system coordination grade and sees attached drawing
2 elastic varying duties and the output of pressure changeable rate controller, interface 1 are that original load is added using newly-generated load limitation to limit
Molding block, interface 2 are to replace original Manual load rate setting module using newly-generated rate value, and interface 3 is online whole
Determine parameter interface.This step function is that excellent control instruction is issued in each control system.
Step 4, by the way that rate optimized algorithm is accessed coordination logic, unit operation curve is observed, verification step 1 is inner each
The reasonability of individual event algorithm and the inner intelligent optimizing algorithm of step 2, real-time online finely tune rate optimized algorithm parameter；
Step 5, unit, if the replacement of system heat power equipment causes machine unit characteristic to change, optimizes in later period operation maintenance
Algorithm is also required to according to unit new features real-time update.Threshold values optimization algorithm, intelligent optimizing algorithm in controller of the invention
All reserving can on-line tuning parameter interface.
A kind of tuning controller based on elastic Changing load-acceleration and elastic pressure changeable rate of brand-new design of the present invention, it is real
Existing Large-sized Coal-fired Power group or gas Combined Cycle Unit coordinated control system elasticity Changing load-acceleration and elastic pressure changeable rate
Control function.Controller is applied directly to the Changing load-acceleration of tuning controller and patrolling for pressure changeable rate by the signal issued
In volume, and then it is directly changed the inertia time of unit cooperative model, acts on fuel quantity, confluent, the wind of unit dynamic model
In coal proportion, the model of dynamic, real-time fitting unit is accomplished accurately to control, and realizes multi-parameter ginseng control calculating fuel, makes
Unit boiler-turbine coordinated match parameter dynamic is obtained to calculate, is optimal in real time.
The present invention is used for the tuning controller of Large-sized Coal-fired Power group and gas Combined Cycle Unit, is based on drum wall Metal Temperature
Degree, cylinder of steam turbine temperature, big machine enabling rate, Important Auxiliary equipment power output, different load stage (deep to adjust), main steam temperature variation
Rate, pressure divergence can be counted dynamically in real time in the optimization algorithm of the excessively low many unit parameters of allowed band, exhaust gas temperature
The optimal variable load rate and transformation rate demand function model of unit are calculated and fitted, and by the algorithm of optimization, improves and coordinates control
Device processed goes coal, water, wind and mutual relationship needed for calculating bottom with optimal controller parameter, so that Control platform
It is remarkably improved, disturbance more tends to balance between system.
Detailed description of the invention
Fig. 1 is a kind of present invention " tuning controller based on elastic Changing load-acceleration and elastic pressure changeable rate " structure
Figure.
Fig. 2 is the present invention " controller of elastic Changing load-acceleration and elastic pressure changeable rate " logic chart.
Fig. 3 is that the threshold values project of " controller of elastic Changing load-acceleration and elastic pressure changeable rate " in the present invention is constituted
Figure.
Fig. 4 is the intelligent optimizing algorithm knot of " controller of elastic Changing load-acceleration and elastic pressure changeable rate " in the present invention
Composition.
Specific embodiment
A kind of tuning controller based on elastic Changing load-acceleration and elastic pressure changeable rate is as shown in Fig. 1, including four
It is most of: to receive unit signal section, variable Rate component project is constituted, tuning controller core elasticity Changing load-acceleration and elasticity
The controller of pressure changeable rate, embedded interface, on-line tuning algorithm parameter interface module.
1, unit signal section, important parameter letter of the primary recipient from DCS (power plant disperses centralized control system) are received
Number, mainly include, it is drum wall temperature, exhaust gas temperature, NOx and SO2 concentration, cylinder of steam turbine temperature, unit load, main steam temperature, comprehensive
Close valve position, blower electric current, feed pump electric current etc..
2, a kind of core of the tuning controller based on elastic Changing load-acceleration and elastic pressure changeable rate is elasticity
The controller of Changing load-acceleration and elastic pressure changeable rate, internal structure are shown in attached drawing 2, mainly there is threshold calculation area and intelligent optimizing
Algorithm area.Threshold calculation area analyzes according to demand when main, process oriented object design based on unit important safety parameter,
Subsidiary engine goes out the rate optimized algorithm of marginal condition of force parameter, environmental protection parameters, a drum wall temperature algorithm of attached drawing 2, b smoke evacuation temperature
Algorithm, c different load algorithm, d subsidiary engine power output algorithm, e steam turbine cylinder temperature algorithm, f comprehensive valve position algorithm, g main steam temperature is spent to calculate.
(each algorithm flow chart is shown in Fig. 3)
As shown in Fig. 2, a algorithm is to generate different Changing load-accelerations and pressure changeable rate algorithms in the different load stage.This is calculated
Method is first by carrying out big data analysis, load, master when according to different load stage varying duty to unit longtime running operating condition
Situations such as steam pressure, Boiler Steam parameter, steam water-level fluctuation, the curve of flameholding situation is analyzed, it can be determined that is gone out
Under the constant speed rate operating condition that original operations staff gives, the flameholding situation of each different load stage unit, boiler
The case where accumulation of heat utilizes, and then on the basis of original constant speed rate in different load stage when, optimizes amendment, then again
Revised parameter is verified in observation in real time.So many suboptimization is corrected and is verified, and each optimal song of load section is ultimately generated
Line function F (Xa)；
The specific technical solution of F (Xa): Pe is set as rated load, Z is the minimum varying duty speed of unit that norm standard requires
Rate is that (for example, the direct-firing unit of 600MW is Pe*1.5%, 1.5%) Z is for the percentage of rated load；Ps main vapour pressure
Setting value, the practical main vapour pressure of Pv, Δ 1 are that (specific value can inquire the current maximum allowable numerical value of unit main steam pressure deviation
" thermal power plant analog control system Acceptance Test regulation ", the direct-firing unit of 600MW grade are ± 0.6MPa),
Then define
If P1For combustion chamber draft measured value, P2For combustion chamber draft actual value setting value, Δ 2 is current unit main furnace chamber pressure
(specific value can inquire " thermal power plant analog control system Acceptance Test regulation ", 600MW etc. to the maximum allowable numerical value of deviation
The direct-firing unit of grade is ± 200Pa), then it defines
It so can be at load point x1 according to algorithmic formula, F (x1)=A1*A2* Pe*Z, according to this formula, multiple
Corresponding F (x1), F (x2), F (x3), F (x4), F (x5), F are calculated at load point x2, x3, x4, x5, x6, x7, x8
(x6), F (x7), F (x8), ultimately generate curvilinear function F (Xa)=(x2, x3, x4, x5, x6, x7, x8；F (x1), F (x2), F
(x3), F (x4), F (x5), F (x6), F (x7), F (x8)).Unit is repaired in different load section in real time automatically according to algorithm F (Xa)
Positive Changing load-acceleration, it is ensured that the matching of machine capacity of furnace demand and burner hearth that each load section main steam pressure of unit is characterized are negative
Press characterized combustion fluctuation that all there is biggish security margin and the economic method of operation.
The invention has the advantages that
First: as shown in Fig. 2, a algorithm is to generate different Changing load-accelerations and pressure changeable rate algorithms in the different load stage
Design in view of underload when the low feature of combustion stability, can be effectively by the extension off the net of AGC minimum load lower limit, greatly
Raising unit flexibility, to power grid because the interval of generation of electricity by new energy and other cause power grid peak valley variation greatly due to there is an urgent need to
The requirement for the depth peak regulation that source side is deepened has very big facilitation.When this algorithm also can take into account the different load stage simultaneously
Required heat is different when the accumulation of heat difference of unit is with varying duty, can significantly improve the response speed of unit, better meet
Unit AGC examines demand, can also obtain net accordingly and adjust to unit about AGC examination reward.Finally, algorithm considers the same of accumulation of heat
When, unit operational limit is also just considered accordingly, can weaken accordingly varying duty speed in the slack-off load section of machine unit characteristic
Rate and pressure changeable, and then improve safety margin when unit operation.
Second: as shown in Fig. 2, b is that drum wall temperature difference is big and to generate the algorithm of varying duty and pressure changeable rate be based on vapour
The optimization algorithm of the containment wall temperature difference and drum rate temperature change, the safety of drum wall temperature when can effectively increase stable operation of unit
Stability margin also will increase service life of equipment accordingly to the fine of drum equipment and materials stress consideration, further to improve
The economy of unit；As shown in Fig. 2, the algorithm that c is the optimization varying duty and pressure changeable rate that go out power limit based on subsidiary engine is based on
Each Important Auxiliary equipment goes out the varying duty of power limit and the rate of pressure changeable, makes each subsidiary engine have bigger peace in unit operation
Full nargin has also accordingly increased the service life of subsidiary engine and then has improved economy；As shown in Fig. 2, d algorithm is based on steam turbine
The cylinder temperature temperature difference and the algorithm for generating varying duty and pressure changeable rate is based on the cylinder of steam turbine temperature temperature difference and cylinder of steam turbine temperature variation speed
The optimization algorithm of rate, Turbine Safety stability margin when will increase unit operation, will increase service life of equipment, into one accordingly
The economy of the raising unit of step.
Third: as shown in Fig. 2, e algorithm is based on the comprehensive valve position optimization varying duty of steam turbine and pressure changeable rate
Algorithm considers the power of real-time steam turbine acting ability, can more accurately calculate machine unit characteristic, and then it is negative to match optimal change
Lotus rate improves unit operation efficiency, promotes the economic performance of unit；As shown in Fig. 2, f algorithm is inclined based on main steam pressure
The optimization varying duty and pressure changeable rate algorithms of difference flexibly match the boiler and steam turbine power output situation of any operating condition, can be more smart
It is really effective to improve unit response speed and safety margin, and then improve unit economy and safety.
4th: as shown in Fig. 2, g is that the algorithm based on exhaust gas temperature optimization varying duty and pressure changeable rate is directly logical
Exhaust gas temperature and every environmentally friendly parameter when crossing previous unit longtime running, to optimize the unit Changing load-acceleration when operating condition
It can be very good to solve unit dirt in varying duty since algorithm is the optimisation strategy based on environmentally friendly parameter with pressure changeable rate
The discharge fluctuation for contaminating object, can effectively reduce environmental pollution, while can also improve the economic performance of unit.
Further, guarantee unit under any operating condition, can in many restraining factors of operating unit most
A big ring, real-time tracking Parameters variation, by the control algolithm of the invention device, so that the short slab of unit operation at any one time is all
It in varying duty and main vapour pressure can be become obtains elastic embodiment, more existing control equipment slightly mad setting control range, comparing makes
With the hard handover approach of defencive function, device of the present invention can more accurately protect unit operational safety and more efficient flexible excavation
The efficiency potential of unit.
Further, improve unit operation stability margin, safety margin simultaneously, reduce the operation of operations staff,
Reduce misoperation probability；In terms of relating to net, also enable the more flexible participation depth peak regulation of unit, preferably responds wanting for AGC
It asks, improves unit and relate to net performance indicator, improve the flexibility that unit load is adjusted；
Further, perfect domestic unit has filled up domestic unit for coordinating in dynamic coordinate Model Calculating Method
Nonlinear model control elastic variable Rate control strategy blank.
As shown in Fig. 2, b algorithm is that drum wall temperature difference is big and generate the algorithm of varying duty and pressure changeable rate.This algorithm is first
The extreme value of drum wall temperature rate of change and drum up-draft gasifier is directly first observed by the long-term running parameter of previous unit,
Requirement standard comparing by metal material when this extreme value and drum safe and stable operation etc. to the temperature difference, judges safety margin, and root
Come the original Changing load-acceleration of adjusting and optimizing and pressure changeable rate according to safety margin, adjustment is then repeated several times and verifies new change and bears
Lotus rate and pressure changeable rate, to generate final suitable Changing load-acceleration and pressure changeable rate algorithms function F (Xb)；
Power plant's operating standard regulation drum up-draft gasifier may not exceed 50 DEG C, wall temperature ramp rate should be less than 1.5 DEG C/
min.According to unit longtime running and start and stop parameter, the extreme value B1 of unit drum wall temperature difference can be searched out, if Δ B is on drum
Portion's wall temperature difference real value, the i.e. maximum value of drum wall temperature difference DELTA B during B1 is operation, defines security interval [0,40], alarm
Traffic coverage [40,45] defines temperature difference function curve F (Δ B), corrects Changing load-acceleration in alarm security section equal proportion.
If B1 < 40,
If B1 >=40,
If Δ R is practical drum wall temperature rate of change, B2 is rate temperature change extreme value, is defined security interval [0,0.8],
It alarms traffic coverage [0.8,1.2], corrects Changing load-acceleration in alarm security section equal proportion.
If B2 < 0.8,
If B2 >=0.8,
Elastic load rate algorithms function F (Xb)=F (Δ B) * F (Δ R) * Pe*Z for generating final b algorithm, (in formula
Pe is rated load, and Z is that the minimum Changing load-acceleration of unit of norm standard requirement is the percentage of rated load)
As shown in Fig. 2, c algorithm is to go out the optimization varying duty of power limit and the algorithm of pressure changeable rate based on subsidiary engine.This is calculated
Method contributed under each operating condition according to each subsidiary engine situation reach nominal output and accordingly to varying duty and pressure changeable rate into
Row adjustment, so that subsidiary engine has bigger safety margin.For example, boiler side subsidiary engine primary air fan, in high load capacity, fuel quantity demand
Larger, blower power output is also larger, at this time can according to running current compared with rated current, fan outlet pressure and blower maximum go out
Power compares, while it is also contemplated that the parameters such as blower motor bearing temperature, vibration, to judge safety allowance that blower is run this moment,
Unit varying duty and pressure changeable rate are reduced according to this nargin, to enable the more stable safe operation of blower.Other are heavy
It wants subsidiary engine such as pressure fan, air-introduced machine, feed pump etc. to generate optimization algorithm in this way, ultimately forms based on each important auxiliary
Machine goes out the varying duty of power limit and the algorithmic function F (Xc) of pressure changeable rate；
If K1 is primary air fan real-time current, K2 is primary air fan rated current, and K3 is average current when operating normally
Value then defines safe operation section [0.85*K3,1.15*K3], and alarm traffic coverage is [1.15*K3,0.9*K2], works as blower
Real-time operating current is in security interval, then defined function F (K)
If M1 pressure fan real-time operating current, M2 is pressure fan rated current, and M3 is being averaged when pressure fan operates normally
Electric current,
Safe operation section [0.85*M3,1.15*M3] is then defined, alarm traffic coverage is [1.15*M3,0.9*M2], when
Blower real-time operating current is in security interval, then defined function F (M)
If N1 pressure fan real-time operating current, N2 is pressure fan rated current, and N3 is being averaged when pressure fan operates normally
Electric current,
Safe operation section [0.85*N3,1.15*N3] is then defined, alarm traffic coverage is [1.15*N3,0.9*N2], when
Blower real-time operating current is in security interval, then defined function F (N)
Ultimately generate elastic load rate algorithms function F (Xc)=F (K) * F (M) * F (N) * Pe*Z；(Pe is specified in formula
Load, Z are that the minimum Changing load-acceleration of unit of norm standard requirement is the percentage of rated load).This algorithm is according to live real
Border situation can also expand out other subsidiary engines such as feed pump etc. similar to F (K), the algorithm of F (M) and F (N).
As shown in Fig. 2, d algorithm is the algorithm for generating varying duty and pressure changeable rate based on the cylinder of steam turbine temperature temperature difference.This
Algorithm directly by the long-term running parameter of previous unit, observes cylinder of steam turbine temperature rate of change and the cylinder of steam turbine temperature temperature difference first
Extreme value requirement standard comparing when this extreme value and the full stable operation of steam turbine to the temperature difference is judged into safety margin, and according to peace
Full nargin comes the original Changing load-acceleration of adjusting and optimizing and pressure changeable rate, is then repeated several times and adjusts and verify new varying duty speed
Rate and pressure changeable rate, to generate the final Changing load-acceleration F (Xd1) and pressure changeable rate based on the cylinder of steam turbine temperature temperature difference
Algorithmic function F (Xd2)；
Generally 50 DEG C of the big protection of temperature difference of the cylinder up and down of the steam turbine of steam turbine plant design, according to unit longtime running trend,
The value D1 of power generator turbine temperature difference of the cylinder can be searched out, is defined security interval [0,35], is alarmed traffic coverage [35,40], definition
Temperature difference function curve F (Δ D) corrects Changing load-acceleration and pressure changeable rate in alarm security section, sets Y as net and adjust requirement
Minimum unit pressure changeable rate, then
Then elastic load rate algorithms function F (Xd1)=F (Δ D) * Pe*Z；(Pe is rated load in formula, and Z is regulation mark
The minimum Changing load-acceleration of the unit of alignment request is the percentage of rated load).
Elastic pressure changeable rate algorithms function F (Xd2)=F (Δ D) * Y；(Y is the Changing load-acceleration that net adjusts minimum requirements).
As shown in Fig. 2, e algorithm is the algorithm based on steam turbine comprehensive valve position optimization varying duty and pressure changeable rate.
This algorithm is that the synthesis valve position command provided according to turbine main control device when unit varying duty and instruction change rate calculating are worked as
The power of preceding steam turbine acting potential, and then optimize Changing load-acceleration.When the sub-loop turbine controller of coordination refers to according to load
Enable the calculated comprehensive valve bit instruction of closed loop open big and change rate it is bigger when, illustrate that Changing load-acceleration is relatively fast at this time, pot
Furnace side power output is kept up with not in time, and steam turbine pitch is caused to need to open rapidly greatly, corresponding just to need to weaken Changing load-acceleration at this time；Instead
It, increases Changing load-acceleration.It is comparable to obtain current composite valve seat opening simultaneously referring also to the same flow curve of each valve of steam turbine
The power of Steam Turhine Adjustment ability, based on this generation according to the curvilinear function F of the Changing load-acceleration of the comprehensive valve position of steam turbine
(Xe1) and elasticity transformation force function F (Xe2)；Δ E is set as current composite valve position, unit %, then to the modified calculation of load rate
Letter of law number F (Δ E1) and as follows to rate of pressure change correction algorithm function F (Δ E2):
Then elastic load rate algorithms function F (Xe1)=F (Δ E1) * Pe*Z；(Pe is rated load in formula, and Z is regulation
The minimum Changing load-acceleration of the unit of standard requirements is the percentage of rated load).
Elastic pressure changeable rate algorithms function F (Xd2)=F (Δ E2) * Y；(Y is the varying duty speed that net adjusts minimum requirements
Rate).
As shown in Fig. 2, f algorithm is optimization varying duty and pressure changeable rate algorithms based on main steam pressure deviation.This is calculated
Method is to judge that can boiler output keep up with steam turbine according to the deviation of main steam pressure when unit varying duty and pressure given value
The demand of side load, and then optimize varying duty and pressure changeable rate.When main steam pressure setting value and actual pressure deviation are larger
When, illustrate that boiler side power output is mismatched with steam turbine side energy requirement at this time, and then need to adjust pressure changeable rate, coordinates steamer
The energy requirement and boiler side heat of pusher side export.When rise load when, main steam pressure setting value be greater than actual pressure and deviation
It is larger, illustrate that boiler side power output is not caught up at this time, when other parameters are suitable, needed to reduce pressure changeable rate, is worked as to match
Preceding power producing characteristics, according to current unit output characteristic, can respond negative faster conversely, can accelerate pressure changeable rate
Lotus demand.Elasticity is generated according to the influence relationship to varying duty and pressure changeable rate of main steam pressure deviation during actual motion
Changing load-acceleration algorithmic function F (Xf)；If Δ F is current pressure setting value in the deviation of actual value, Q is " thermal power plant mould
Analog quantity control system Acceptance Test regulation " in require unit maximum dynamic pressure deviation, then to load rate correction factor letter
Number F (Δ F):
Then F (Xf)=F (Δ F) * Pe*Z；(Pe is rated load in formula, and Z is that minimum become of unit that norm standard requires is born
Lotus rate is the percentage of rated load).
As shown in Fig. 2, g algorithm is the algorithm for optimizing varying duty and pressure changeable rate based on exhaust gas temperature.This algorithm
Directly by exhaust gas temperature when previous unit longtime running and every environmentally friendly parameter, i.e. influence of the exhaust gas temperature to denitration,
The algorithmic function of the variation limitation unit ramp rate of environmentally friendly parameter is generated according to the relationship of exhaust gas temperature and NOx concentration etc.
F(Xg)；50ppm should be lower than according to the concentration of emission of environmental requirement fire coal thermal power generation unit NOx.If Δ G is outlet NOx emission
Concentration, then to Changing load-acceleration correction factor function F (Δ G) such as following formula:
The g algorithm ultimately generated is F (Xg)=F (Δ G) * Pe*Z；(Pe is rated load in formula, and Z is norm standard requirement
The minimum Changing load-acceleration of unit be rated load percentage).
Every threshold calculation calculates the rate requirement of different threshold values according to respective marginal condition in real time, and output is to intelligence
Optimizing algorithm.I.e. by big data analysis, fuzzy weighted values ratio is set using empirical method, then device is completed preferentially eventually by small choosing choosing
It calculates.
Intelligent optimizing algorithm is shown in intelligent optimizing algorithm module section in attached drawing 1 in intelligent optimizing algorithm area, for realizing right
Every threshold calculation output result carries out intelligent optimizing, and specific core algorithm is shown in attached drawing 4.
As shown in figure 3, including the threshold values group that 8 project essential condition algorithms generate, intelligent setting module selection is collectively formed
Entry.The entry enumerated is the Patent project group field test the selection result (including drum wall temperature, cylinder temperature, buck/Wen Su
Rate, main vapour pressure deviation, load dividing, comprehensive valve position, subsidiary engine power output, exhaust gas temperature), such as the controller internal algorithm examines
Influence of the main steam temperature rate of change to unit varying duty and pressure changeable is considered, control target improves the operation peace of unit
Quan Xing, while having benign facilitation to the service life of boiler tube, improve the economy of unit operation；Such as controller again
Internal algorithm considers influence of the variation of subsidiary engine power output to unit varying duty and pressure changeable, as subsidiary engine reaches rated current phase
That answers slows down the response speed of subsidiary engine, it is therefore an objective to protect the subsidiary engine safe by the patent controller, increase corresponding subsidiary engine
The safety of service life and unit；For example described controller internal algorithm considers different load stage entire machine unit characteristic again
The different influences to unit varying duty and pressure changeable, such as in low load stage, the poor combustion stability of boiler, accumulation of heat is small,
So the characteristic of unit at this time is bigger than the different from those of other load section, and it is non-linear stronger, correspondingly to Changing load-acceleration and change
Pressure rates correct certain coefficient, are that boiler combustion fluctuation is small more steady, to the depth peak-regulating low-load tune of current electric grid
Degree is extremely helpful, while also improving the security and stability of unit.
The controller includes the intelligent screening module to each marginal condition (8), and the module is fixed by matching to each condition
Fuzzy weighted values ratio, eventually by small choosing choosing then device complete intelligence preferentially calculate.The final lifting load rate generated and lifting master
The setting of vapour pressure power rate passes through the coordination system regulation equipment of next step, acts on each equipment of power generation link.
3, embedded interface
Embedded interface is shown in interface area in attached drawing 1, and for detailed construction as shown in the embedded interface 1,2,3 of attached drawing 1, being used for will
The result of the rate optimized algorithm of intelligence is linked into original coordination logic, forms new tuning controller.Comprehensively consider original coordination
The logical algorithms such as rate limit, the block increase of load and pressure, block decrease and rate optimized algorithm of the invention is excellent in logic
First grade, according to safe and stable operation highest priority, operations staff intervene second, environmental-protecting performance third, economic performance and flexibly
The minimum principle of performance, the embedded interface of design speed optimization algorithm.
4, on-line tuning algorithm parameter module
On-line tuning module is as shown in Figure 1, on-line tuning and later period operation and maintenance after putting into operation for above-mentioned each algorithm.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
The manufacture of device is enabled, which realizes in one box of one or more flows of the flowchart and/or block diagram or multiple
The function of being specified in box.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Specific embodiment is applied in the present invention, and principle and implementation of the present invention are described, above embodiments
Explanation be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art,
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion in this specification
Appearance should not be construed as limiting the invention.
Claims (1)
1. a kind of implementation method of flexibility tuning controller, which is characterized in that step that the specific method is as follows:
Step 1, application machine set system signal is received, unit safety threshold calculation and performance threshold calculation, this control are established
Device reception unit signal includes drum wall metal temperature, cylinder of steam turbine temperature, steam turbine pitch opens rate, Important Auxiliary equipment goes out
Power, different load stage deep tune, main steam temperature rate of change, pressure divergence are too low in allowed band, exhaust gas temperature, and threshold values is calculated
Marginal condition algorithm in method area calculates unit variable load rate demand threshold values under this condition, including 8 projects it is characterized in that, packet
Include drum wall temperature condition F (Xa), exhaust gas temperature condition F (Xb), load dividing condition F (Xc), subsidiary engine power output condition F (Xd), vapour
Turbine cylinder temperature condition F (Xe), comprehensive valve position condition F (Xf), main steam temperature condition F (Xg)；
F (Xa) algorithm of 1.1 designs includes its margin of safety condition and performance evaluating threshold values, if Pe is rated load, Z is regulation
The minimum Changing load-acceleration of the unit of standard requirements is the percentage of rated load, and the direct-firing unit of 600MW is Pe*1.5%, Z
As 1.5%；Ps main vapour pressure setting value, the practical main vapour pressure of Pv, Δ 1 are that current unit main steam pressure deviation is maximum allowable
Numerical value, specific value can inquire " thermal power plant analog control system Acceptance Test regulation ", the direct-firing unit of 600MW grade
For ± 0.6MPa,
Then define
If P1For combustion chamber draft measured value, P2For combustion chamber draft actual value setting value, Δ 2 is current unit main furnace chamber pressure divergence
(specific value can inquire " thermal power plant analog control system Acceptance Test regulation " to maximum allowable numerical value, and 600MW grade is straight
Blowing formula unit is ± 200Pa), then it defines
According to algorithmic formula, F (x1)=A at foundation load point x11*A2* Pe*Z, according to this formula, multiple load point x2, x3,
Corresponding F (x1), F (x2), F (x3), F (x4), F (x5), F (x6), F (x7), F are calculated at x4, x5, x6, x7, x8
(x8), it calculates and generates characteristic function F (Xa)=(x2, x3, x4, x5, x6, x7, x8；F (x1), F (x2), F (x3), F (x4), F
(x5), F (x6), F (x7), F (x8)), unit corrects varying duty speed in different load section automatically according to algorithm F (Xa) in real time
Rate, it is ensured that the matching of machine capacity of furnace demand and combustion chamber draft that each load section main steam pressure of unit is characterized were characterized
Combustion fluctuation all has biggish security margin and the economic method of operation.
1.2 algorithmic function F (Xb)；Power plant's operating standard regulation drum up-draft gasifier may not exceed 50 DEG C, wall temperature ramp rate
It should be less than 1.5 DEG C/min.According to unit longtime running and start and stop parameter, the extreme value B1 of unit drum wall temperature difference can be searched out,
If Δ B is drum top wall temperature difference real value, i.e. the maximum value of drum wall temperature difference DELTA B during B1 is operation defines safety zone
Between [0,40], alarm traffic coverage [40,45], define temperature difference function curve F (Δ B), alarm security section equal proportion correct
Changing load-acceleration；
If B1 < 40,
If B1 >=40,
If Δ R is practical drum wall temperature rate of change, B2 is rate temperature change extreme value, is defined security interval [0,0.8], alarm
Traffic coverage [0.8,1.2] corrects Changing load-acceleration in alarm security section equal proportion；
If B2 < 0.8,
If B2 >=0.8,
Elastic load rate algorithms function F (Xb)=F (Δ B) * F (Δ R) * Pe*Z of final b algorithm is generated, (Pe is in formula
Rated load, Z are that the minimum Changing load-acceleration of unit of norm standard requirement is the percentage of rated load)
The algorithm threshold values is sent to next step optimizing intelligent screening device, replaces original hard handover rate to patrol with the variable Rate of elasticity
Volume, it realizes the more marginal condition ginseng controls of multi-parameter and calculates Changing load-acceleration and pressure changeable rate, realize that each parameter of firepower unit is soft
Property coordinate configuration；
Step 2, foundation and editorial intelligence optimizing algorithm, using on-line intelligence screening module, by the inner each algorithm valve of step 1
It is worth online optimizing, intelligent optimizing optimal parameter searches out and reaches the domain bottom valve value of marginal condition in all algorithm devices and specifically calculate
Method rule, the optimal Changing load-acceleration and pressure changeable rate of generation send to next step interface and export, setting to coordinated control system；
On-line intelligence analyzer optimizing algorithm area algorithmic function are as follows: MIN [Fuzzy Sets(F (Xa), F (Xb), F (Xc), F (Xd), F (Xe),
F (Xf), F (Xg), F (Xh)]
Intelligent screening module is by matching fixed fuzzy weighted values ratio to each condition, and eventually by small choosing choosing, then device completion intelligence is preferentially counted
It calculates.The final lifting load rate and lifting main vapour pressure rate setting that generate pass through the coordination system regulation equipment of next step, effect
In each equipment of power generation link；
Step 3, control unit interface is located at unit DCS power plant dispersion centralized control, system coordination grade elasticity varying duty and transformation
The output of power rate controller takes small interface to enter original using the original load limitation module of newly-generated load limitation addition
Coordinated control system is considered as system interface；Replace original Manual load rate setting module using newly-generated rate value, this
Step function is that excellent control instruction is issued to each control system, including the control of Fuel Control System, wind and smoke by system interface
System, in the controls of substate system such as water management；
Step 4, unit is in later period operation maintenance, if the replacement of system heat power equipment causes machine unit characteristic to change, optimization algorithm
It is also required to according to unit new features real-time update, threshold values optimization algorithm, intelligent optimizing algorithm are all reserved in the controller can be online
Setting parameter interface；
Step 5, based on the intelligent behaviour setting module on heating power automation coordinated control system, setting module passes through sending
Signal is applied directly in the Changing load-acceleration of tuning controller and the control logic of pressure changeable rate, and then is directly changed power generation
Unit varying duty intensity, acts in the dynamically load of unit fuel quantity, confluent, wind coal proportion, realizes unit lifting load
Safety and regulation performance balance, realize multi-parameter ginseng control calculate fuel, the controller eventually by connection coordinate control
The amplitude limitation of system processed and rate limit blocks act on each equipment of power generation link, and operations staff, which manually sets, equally to be had
Effect, but a condition item of its only system self judgment, when the amplitude lower bound and rate lower bound that have triggering intelligent selection open
When dynamic, system will be set automatically, complete the adjustment of unit dynamic operation.
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