CN103150413A - Determining method and device for RB (Runback) project parameters in power system - Google Patents
Determining method and device for RB (Runback) project parameters in power system Download PDFInfo
- Publication number
- CN103150413A CN103150413A CN2011104048646A CN201110404864A CN103150413A CN 103150413 A CN103150413 A CN 103150413A CN 2011104048646 A CN2011104048646 A CN 2011104048646A CN 201110404864 A CN201110404864 A CN 201110404864A CN 103150413 A CN103150413 A CN 103150413A
- Authority
- CN
- China
- Prior art keywords
- test
- unit
- project
- dynamic perfromance
- simulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Feedback Control In General (AREA)
Abstract
The invention provides a determining method and device for RB (Runback) project parameters in a power system. The method comprises the following steps of: establishing dynamic characteristics among main parameters of a unit corresponding to an RB project according to a main parameter disturbance test; establishing a system simulation model corresponding to the RB project according to actual work; performing RB project simulation test in the system simulation model according to the dynamic characteristics among main parameters; and determining the RB project parameters according to an RB project simulation test result. Through the invention, the success rate and stability of the actual RB test can be improved.
Description
Technical field
The present invention relates to electric system, particularly, relate to definite method and the device of RB item argument in a kind of electric system.
Background technology
When fired power generating unit broke down tripping operation in Important Auxiliary equipment, moment lost part on-load ability, and quick response and stable operation that unit is controlled are stern challenges.The fast load shedding function (RUNBACK of unit, hereinafter to be referred as RB) purpose of design be exactly to guarantee under the fast transient operating mode that the unit major pant item breaks down, by the selection to the judgement of the logic under various different operating modes and the method for operation and control strategy, automatically complete the load of unit is down to current operational outfit and allow the corresponding target load of exerting oneself, guarantee that simultaneously main regulating system is working properly, keep the unit major parameter in allowed band.The design of large electric power plant unit RB function is automatic decision and a control systems engineering (CSE) with very high adaptability for working condition and automatic function integrity.RB tests as one of most important test after Power Plant debugging or overhaul, the once success rate of its pilot project and effective the input for guaranteeing that unit safety operation, the unplanned stoppage in transit number of times of minimizing unit have decisive meaning, all have very important effect to the unit safety of Power Plant Side and the power supply safety of grid side.
But; although existing RB plan design provides techniqueflow and the principle that has realized unit RB function; but the characteristic of the unit when actual RB not being occured is tested and is assessed; several the units that same factory often can occur according to existing scheme are in equipment homotype, same operating mode and when adopting identical RB steering logic to carry out the RB test, and test findings is inconsistent problem.For example, the drum boiler of the 600MW of certain 4 homotype of factory carries out the RB test after overhaul, wherein, all once successes of the RB test of 1# unit, but 2# unit, 3# unit, 4# unit all have once success of some projects in the design agents logic of RB on all four situation, and what have is even repeatedly unsuccessful and project is different.This is because the characteristic of homotype unit can be not in full accord, in the situation that the RB flow scheme design is consistent, determine RB whether successful key depend on unit principal parameter such as coal quantitative change rate, main vapour pressure rate of change, sliding pressure desired value, subtract the concrete setting of the dynamic similation amounts such as the limit value of coal desired value, Important Auxiliary equipment and restriction speed.Existing scheme does not provide and relates to the establishing method of above-mentioned key parameter and foundation is set, the setting of above-mentioned important parameter relies on the experience of testing crew self set fully, therefore caused the inconsistency of test findings and the uncertainty of success of the test rate, thereby the risk that has increased the weight of to test is unfavorable for the safe and stable operation of power plant.
Summary of the invention
The fundamental purpose of the embodiment of the present invention is to provide definite method and the device of RB item argument in a kind of electric system, to solve RB of the prior art test due to the RB item argument unsettled problem of RB success of the test rate that causes of value setting by rule of thumb only.
To achieve these goals, the embodiment of the present invention provides definite method of RB item argument in a kind of electric system, and the method comprises: set up dynamic perfromance between unit major parameter corresponding to RB project according to the principal parameter upset test; System simulation model corresponding to RB project according to the real work system made; Carry out the test of RB project simulation according to the dynamic perfromance between described unit major parameter in described system simulation model; Determine described RB item argument according to described RB project simulation test findings.
Before setting up dynamic perfromance between unit major parameter corresponding to RB project according to the principal parameter upset test, described method also comprises: obtain dynamic perfromance between single mill tripping operation and described unit major parameter according to single mill tripping operation upset test.
Particularly, above-mentioned RB project comprise following one of at least: feed pump RB, stove water pump RB, coal pulverizer RB, air preheater RB, primary air fan RB, send induced draft fan RB.
When above-mentioned RB project was primary air fan RB, described unit major parameter comprised: unit load, main vapour pressure, coal amount, steam turbine are transferred valve; Described RB item argument comprises: sliding pressure target and sliding pressure speed.
The described dynamic perfromance of setting up between unit major parameter corresponding to RB project according to the principal parameter upset test comprises: obtain main vapour pressure and unit load dynamic perfromance under the boiler different load according to coal amount upset test; Obtain main vapour pressure and unit load dynamic perfromance under the boiler different load according to the valve upset test.
When above-mentioned RB project was feed pump RB, described unit major parameter comprised: the water yield, steam water-level, quantity of steam; Described RB item argument comprises: feed pump scoop tube maximal value and feed pump scoop tube maximum rate.
The described dynamic perfromance of setting up between unit major parameter corresponding to RB project according to the principal parameter upset test comprises: obtain quantity of steam disturbance water drum water level dynamic characteristics according to the quantity of steam upset test; Obtain scoop tube disturbance water drum water level dynamic characteristics according to the scoop tube upset test.
The embodiment of the present invention also provides definite device of RB item argument in a kind of electric system, and described device comprises: the principal parameter dynamic perfromance is set up the unit, for the dynamic perfromance of setting up according to the principal parameter upset test between unit major parameter corresponding to RB project; System simulation model is set up the unit, is used for system simulation model corresponding to RB project according to the real work system made; The l-G simulation test performance element is used for carrying out the test of RB project simulation according to the dynamic perfromance between described unit major parameter at described system simulation model; RB item argument determining unit is used for determining described RB item argument according to described RB project simulation test findings.
Above-mentioned device also comprises: single tripping operation-principal parameter dynamic perfromance acquiring unit that grinds, obtain single dynamic perfromance of grinding between tripping operation and described unit major parameter according to single mill tripping operation upset test.
The RB project simulation test that above-mentioned l-G simulation test performance element is carried out comprise following one of at least: feed pump RB l-G simulation test, stove water pump RB l-G simulation test, coal pulverizer RB l-G simulation test, air preheater RB l-G simulation test, primary air fan RB l-G simulation test, send induced draft fan RB l-G simulation test.
When the l-G simulation test performance element was carried out primary air fan RB l-G simulation test, described unit major parameter comprised: unit load, main vapour pressure, coal amount, mechanism of qi are transferred valve; Described RB item argument comprises: sliding pressure target and sliding pressure speed.
Above-mentioned principal parameter dynamic perfromance is set up the unit and comprised: the first principal parameter dynamic perfromance is set up module, is used for obtaining main vapour pressure and unit load dynamic perfromance under the boiler different load according to coal amount upset test; The second principal parameter dynamic perfromance is set up module, is used for obtaining main vapour pressure and unit load dynamic perfromance under the boiler different load according to the valve upset test.
When the l-G simulation test performance element was carried out feed pump RB l-G simulation test, described unit major parameter comprised: the water yield, steam water-level, quantity of steam; Described RB item argument comprises: feed pump scoop tube maximal value and feed pump scoop tube maximum rate.
Above-mentioned principal parameter dynamic perfromance is set up the unit and comprised: the 3rd principal parameter dynamic perfromance is set up module, is used for obtaining quantity of steam disturbance water drum water level dynamic characteristics according to the quantity of steam upset test; The 4th principal parameter dynamic perfromance is set up module, is used for obtaining scoop tube disturbance water drum water level dynamic characteristics according to the scoop tube upset test.
By means of above-mentioned difference technical characterictic one of at least, by first setting up the dynamic perfromance between RB project and principal parameter, then carry out the RB l-G simulation test, determine the RB item argument according to Simulation results more afterwards, can improve success ratio and the stability of actual RB test.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, during the below will describe embodiment, the accompanying drawing of required use is done to introduce simply, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 determines the process flow diagram of method according to RB item argument in the electric system of the embodiment of the present invention;
Fig. 2 is load and the pressure dynamics curve map from the direct coal amount upset test of deriving of DCS system;
The pressure load qualitative tendency figure of Fig. 3 coal amount disturbance that emulation obtains in Matlab.
Fig. 4 is the primary air fan RB test simulation model system schematic diagram according to the embodiment of the present invention;
Fig. 5 is the trend map of RB test simulation modeling actual tests dynamic change;
Fig. 6 is a new wind RB test action trend map;
Vapour, hydrodynamic(al) step response control program simulation model system schematic diagram when Fig. 7 is simulation RB generation;
Fig. 8 (a) is load water level settings value upset test SEA LEVEL VARIATION trend map when constant;
Fig. 8 (b) is steam water-level dynamic perfromance changing trend diagram when being normal varying load;
Main steam flow and steam water-level temporal variations trend map when Fig. 9 is simulation feedwater RB generation;
Figure 10 is that after adopting newly-installed parameter, actual feed pump RB tests carbonated drink dynamic change real-time tendency analysis chart;
Figure 11 is feed pump RB l-G simulation test action trend map after the newly-installed parameter of employing;
Figure 12 determines the structured flowchart of device according to RB item argument in the electric system of the embodiment of the present invention;
Figure 13 determines the concrete structure block diagram of device according to RB item argument in the electric system of the embodiment of the present invention;
Figure 14 sets up the structured flowchart of unit 1 according to the principal parameter dynamic perfromance of the embodiment of the present invention;
Figure 15 sets up the concrete structure block diagram of unit 1 according to the principal parameter dynamic perfromance of the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Because the RB item argument in existing scheme does not also have the establishing method of science and foundation is set, only rely on the experience of testing crew self set, therefore cause the inconsistency of RB test findings and the uncertainty of success ratio, thereby caused the security hidden trouble of power plant.Based on this, the embodiment of the present invention provides definite method and apparatus of RB item argument in a kind of electric system.The present invention is described in detail below in conjunction with accompanying drawing.
Embodiment one
The embodiment of the present invention provides definite method of RB item argument in a kind of electric system, and Fig. 1 is the process flow diagram of the method, and as shown in Figure 1, the method comprises:
Step 101 is set up dynamic perfromance between unit major parameter corresponding to RB project according to the principal parameter upset test;
Step 102 is according to system simulation model corresponding to real work system made RB project;
Step 103 is carried out the test of RB project simulation in system simulation model according to the dynamic perfromance between the unit major parameter;
Step 104 is determined the RB item argument according to RB project simulation test findings.
Can be found out by above description, by first setting up the dynamic perfromance between RB project and principal parameter, then carry out the RB l-G simulation test, determine the RB item argument according to Simulation results more afterwards, the RB item argument of determining by modeling is than empirical value of the prior art, has preferably on the success ratio of actual RB test and stability and improves.
Before the dynamic perfromance of setting up according to the principal parameter upset test between unit major parameter corresponding to RB project, said method also comprises: obtain single dynamic perfromance of grinding between tripping operation and unit major parameter according to single mill tripping operation upset test.Grind the tripping operation upset test by list, can improve for the variation of each principal parameter in the RB test and analyze foundation.
In the specific implementation, the RB project comprise following one of at least: feed pump RB, stove water pump RB, coal pulverizer RB, air preheater RB, primary air fan RB, send induced draft fan RB.
For example, when carrying out primary air fan RB test, above-mentioned unit major parameter comprises: unit load, main vapour pressure, coal amount, mechanism of qi are transferred valve; The RB item argument comprises: sliding pressure target and sliding pressure speed.The above-mentioned dynamic perfromance of setting up between unit major parameter corresponding to RB project according to the principal parameter upset test specifically comprises: obtain main vapour pressure and unit load dynamic perfromance under the boiler different load according to coal amount upset test; Obtain main vapour pressure and unit load dynamic perfromance under the boiler different load according to the valve upset test.
Again for example, when carrying out feed pump RB, above-mentioned unit major parameter comprises: the water yield, steam water-level, quantity of steam; Above-mentioned RB item argument comprises: feed pump scoop tube maximal value and feed pump scoop tube maximum rate.The above-mentioned dynamic perfromance of setting up between unit major parameter corresponding to RB project according to the principal parameter upset test comprises: obtain quantity of steam disturbance water drum water level dynamic characteristics according to the quantity of steam upset test; Obtain scoop tube disturbance water drum water level dynamic characteristics according to the scoop tube upset test.
Below take primary air fan RB test as example, describe the embodiment of the present invention in detail.
One, for setting up the RB system simulation model, need to whether can survey according to system architecture and signal, relevance is divided the identification link between signal, determines the transport function of each link by the dynamic process of derivation control system.
When needs were set up unit load, main vapour pressure, coal amount, steam turbine and transferred dynamic perfromance between the valve parameters, at first the unit operating mode should be stablized, and reduces the interference of other factors as far as possible.The dynamic characteristic test process is as follows particularly:
A) coal amount upset test
In unit load 50%MCR, two stages of 70%MCR, under the unit load steady working condition, the releasing boiler master is automatic, keep large machine valve seat opening constant, manually rapidly step increase fuel quantity 10t/h or more than, the variation tendency of test unit main vapour pressure and load obtains main vapour pressure and the transport function of load to the coal amount under the boiler different load, and the time (being pure delaying) of recording main vapour pressure of boiler and loading and produce.That is, first carry out the refuelling test, after end steady load to be tested, manually reduce fuel quantity 10t/h, boiler characteristics and modeling when testing respectively the ascending, descending load.
B) valve upset test
In unit load 50%MCR, two stages of 70%MCR, under the unit load steady working condition, the releasing boiler master is automatic, keep the coal amount constant, manually rapidly step increase large machine valve opening (comprehensive valve position) 5% or more than, the variation tendency of test unit main vapour pressure and load obtains main vapour pressure and the transport function of load to valve under the boiler different load, and the time (being pure delaying) of recording main vapour pressure of boiler and loading and produce.That is, first open the valve characteristic test, after end steady load to be tested, manually reduce large machine valve opening (comprehensive valve position) 5%, boiler characteristics and modeling when testing respectively the ascending, descending load.
C) level pressure load change test
Under the fixed pressure operation mode, drop into and coordinate, carry out the test of varying load rate.Trial stretch is in 50%～100% load section, and the varying load value is drafted 50～100MW, and the varying load rate progressively changes 9MW/min, 12MW/min into by 5MW/min, observes unit major parameter variation tendency and modeling.
D) constant load transformation test
Operations staff's manual pressure target value before the change machine under pressurization methods, unit major parameter variation tendency and modeling according to response curve, are observed in rate of pressure change 0.2MPa/min left and right before machine.
After completing above-mentioned test, derive the input/output argument as each identification link from the historical trend of the actual DCS of unit system, adopt transfer function method to set up the mathematical model structural drawing of regulating system, the application Recursive Least-square is determined the model parameter to be identified in model.Can pick out the dynamic perfromance of loading under the dynamic perfromance, pitch disturbance of the dynamic perfromance of loading under the dynamic perfromance, fuel disturbance of fuel disturbance downforce, pitch disturbance downforce, with parameter and the raw data curve comparison of identification model, carry out determining of identification precision.In like manner, can pick out the characteristic of all Dynamic modes relevant with pilot project for concrete RB pilot project, build model bank in simulation software, thus the state when simulating actual RB generation.
Two, be the RB ability of evaluation unit, all should have carried out single mill tripping operation upset test before the RB test.Obtain single mill tripping operation to the dynamic perfromance of unit principal parameter impact by test, specifically comprise: obtain single mill tripping operation to the dynamic perfromance of unit load, main steam temperature, main vapour pressure, steam water-level, primary air pressure, combustion chamber draft, total blast volume.Like this, can provide the analysis foundation for the variation of each principal parameter in the RB test by the dynamic characteristic information that obtains.
The RB project of three, carrying out for needs (comprise feed pump RB, stove water pump RB, air preheater RB, primary air fan RB, send induced draft fan RB), according to predetermined test sequence, build one by one realistic model and the platform of single RB test, generally test according to success ratio principle from high to low and carry out, be followed successively by and send induced draft fan RB, air preheater RB, primary air fan RB, stove water pump RB, feed pump RB to carry out.Build after individual event RB model according to dynamic perfromance and the parameter obtained in above-mentioned one, two the RB item argument that arranges in the RB test is carried out emulation, estimate the result of actual RB test and optimize accordingly.And constantly realistic model is improved and revises by the actual RB test of carrying out.
In embodiments of the present invention, adopt computer control system (as the DCS system) and the common realization of modeling simulation analysis software (for example Matlab) of Power Plant.Can sample by DCS and obtain each control signal, the configuration of logical scheme also realizes in DCS.In embodiment, PID used, adder block, filter block, subtraction block, multiplication block, unperturbed handover module, MA manual operator etc. are algorithms most in use piece in digital control system, and it is adjusted and calculates more convenient.Simulink module group in Matlab is as the software package that dynamic system is carried out modeling, emulation and analysis of a special use, it supports linearity and nonlinear system, can be continuously and modeling in discrete time-domain, be widely used in that signal is processed and the field such as automatic control.By the Simulink modeling and simulating, the control program of at first optimizing RB under each operating mode is that it is controlled substantially, selects under effective prerequisite in control program, further each is controlled parameter and adjusts targetedly, can realize best effect.
In practical operation, primary air fan RB is the highest RB project of mortality in blower fan RB, and send induced draft fan RB and air preheater RB one-time success rate relatively high, and the latter optimization method, step, modeling and simulating flow process all consistent with the former, be only that modeling object is different.
Below take primary air fan RB, feed pump RB as example, describe the embodiment of the embodiment of the present invention in detail.
One, certain 300MW drum boiler adopts two primary air fans, and the sliding pressure target should be followed slow release boiler heat when primary air fan RB, rather than economic sliding pressure curve.Because sliding pressure setting value and sliding pressure speed in existing RB scheme are set with deciding empirical value, the unreasonable primary air fan RB test failure that causes is set.Be set to example with sliding pressure setting value and sliding pressure speed, the optimizing process that arranges of this programme RB parameter be described:
1) transfer dynamic perfromance between the valve parameters by upset test scheme concrete in above-mentioned steps one to set up unit load, main vapour pressure, coal amount, steam turbine.
At first be coal amount upset test, to the characteristic test of load and pressure under Boiler Steam generation time and the disturbance of coal amount.That is, under unit load 210MW and unit load steady working condition, remove boiler master and owner and control automatically, manually step increases fuel quantity 10t/h rapidly, and the variation tendency of test unit main vapour pressure and load obtains the boiler target transfer function.Test figure and figure record and preserve by Power Plant DCS System historical data trend analysis function, can be directly derive from the DCS system and carry out models fitting.The data sampling cycle is 1s, and acquisition time is 1600s, obtains 1600 groups of data.Owing to there being the HFS that is unfavorable for identification in the data of on-the-spot actual measurement, in order to improve identification precision, bad point in the data group is rejected, and the filtering that the data group value of averaging is 1.5s is processed, then carry out trending and standardization and process, the load of the coal amount upset test of directly deriving from the DCS system and pressure dynamics curve are as shown in Figure 2.
For unit pulverized-coal system, changing to the process of main vapour pressure between beginning to change from combustion rate is that main vapour pressure is to the pure delay time delay τ of the response characteristic of combustion rate, be the t1 in Fig. 2,67.3% left and right that begins to change to final stable time (being the t2 Fig. 2) of pressure from main vapour pressure is inertia time delay Tc.The pure delay time delay τ that test records the main vapour pressure speed-rising characteristic is respectively 50s, and inertia time delay Tc is 406s, obtains organizing the coal amount to the transport function of main vapour pressure to be:
The overall dynamic perfromance of completing according to upset test scheme concrete in above-mentioned steps one is as follows:
Pressure is to the part throttle characteristics function:
The early investment universal time coordinated obtains pitch to the characteristic function of pressure;
The characteristic function of pitch to load
Above-mentioned characteristic function is applied in the Matlab realistic model, obtains the pressure load qualitative tendency figure of coal amount disturbance as shown in Figure 3.
2) carry out list mill tripping operation upset test before the RB test.
The major parameter that before test, unit load moves when 300MW is A mill, B mill, C mill, four layers of mill operation of D mill, total coal amount 123t/h, combustion chamber draft-111Pa, unit load 300MW, 491 ℃ of main steam temperatures.Operations staff's hand stops the D mill, large machine pitch and coal amount are controlled and all are in manual mode, the coal amount skips to 90t/h, unit load is by 300MW, be down to 252MW with the average velocity of 6.3MW/MIN, main vapour pressure is by 16.02MPa, be down to 14.06MPa with the average velocity of 0.38MPa/MIN, combustion chamber draft is minimum is down to-502Pa, and minimum 477 ℃ of main steam temperature tended towards stability after 9 minutes.According to coal pulverizer tripping operation upset test and dynamic perfromance result, build RB simulated environment as shown in Figure 4.
Respectively with above-mentioned 1) in the G that obtains
11(s), G
12(s), G
21(s), G
22(s) in characteristic function substitution model shown in Figure 4.Known scene is when 300MW, and total coal amount is 123t/h, and the D that primary air fan RB will trip, the coal amount of C layer mill at full capacity the time are respectively 30t/h and 33t/h.In the RB steering logic, target coal amount is to keep the 70t/h operation, therefore the setp1 in Fig. 4 (being the coal amount setting apparatus that the tripping operation of D mill will reduce) is-30t/h, after setp2 in Fig. 4 (being the coal amount setting apparatus that after C mill 10s, tripping operation will reduce) is set in 10s-33t/h, because target coal amount is to keep 70t/h, step3 in Fig. 4 (the coal amount setting apparatus of the master control of namely burning) is the anti-17t/h of adding coal amount after 15s, the situation of change of total coal amount when the superposed simulation RB by the three occurs.Construct the dynamic setting value of main vapour pressure in the RB test by step6 (being sliding pressure desired value setting apparatus) structure sliding pressure desired value and sliding pressure rate setting device simultaneously, when simulation RB occurs, the change procedure of the load of reality and pressure is by G
11(s), G
12(s), G
21(s), G
22(s) 4 dynamic perfromances build, and by the coal amount, pressure characteristic stack pitch are obtained actual pressure change procedure to pressure characteristic, in like manner by pitch, part throttle characteristics and pressure are obtained actual load alternation process to part throttle characteristics.By above-mentioned whole modeling, the actual change procedure parameter of comparable pseudopressure is guaranteeing under the prerequisite of steady load instead to have released the sliding pressure target that is fit to pressure set points and speed.Fig. 5 is the trend map of RB test simulation modeling actual tests dynamic change.
3) analyze simulation result, Optimal Parameters setting
By wind RB of above-mentioned emulation 300MW test, during current pressure decline 0.39MPa when being occured by RB, RB has reached the 160MW that loads, loads and has fallen 148MW in 4 minutes.Simulation results shows, desirable sliding pressure desired value is 14.8MPa, and during the RB action, sliding pressure speed is 0.15MPa, and when RB moves to 160MW, the RB signal should reset, and sliding pressure this moment can change into pressurization methods, and human intervention begins manual recovery operation.Test findings shows, emulation that curve shown in Figure 5 is comparatively accurate actual sliding pressure mode RB process, with reference to simulation result, reset sliding pressure setting value and sliding pressure speed and re-start the RB test of primary air fan, the RB test findings of new primary air fan is disposable success, Fig. 6 is a new wind RB action trend map, and table 1 is actual wind RB test major parameter value.
Table 1
| Minimum | The highest | Setting value | Unit | |
| Load | 146 | 203 | MW | |
| Main vapour pressure | 15.25 | 15.7 | Sliding pressure, sliding pressure speed 0.15MPa | MPa |
| Furnace pressure | -1104 | 880 | -50 | Pa |
| Primary air pressure | 6 | 8.05 | Sliding pressure 10.35-9 | kPa |
| Steam water-level | -119 | 1.7 | 0 | mm |
| Main stripping temperature | 452 | 473 | Slip 537-535 | ℃ |
| Air output | 630 | 799 | Slip 800-640 | t/h |
Two, certain 600MW drum boiler water supply system adopts three electric pumps, feed pump RB test is under the single feed pump trip accident, because feed pump scoop tube maximal value and maximum rate in existing RB scheme arrange unreasonable, cause water to be affected, the carbonated drink imbalance makes the too low triggering of steam water-level hang down 3 values simultaneously, the failure of MFT action test.Below arrange with feed pump topworks and be optimized for example, the setting up procedure of this programme RB parameter is described:
1) obtain dynamic perfromance between confluent, steam water-level, quantity of steam parameters, for example steam flow disturbance water drum water level dynamic characteristics
Electric pump scoop tube disturbance water drum water level dynamic characteristics
Integrated dynamic model simulation architecture and dynamic process that structure is completed, vapour, hydrodynamic(al) step response control program analogous diagram when Fig. 7 is simulation RB generation, as shown in Figure 7, deviation by steam water-level setting value and actual water level in Fig. 7 is transferred the effect of two PID pieces through homophony and pair, finally calculate the scoop tube opening value of feed pump, can simulate scoop tube aperture to the dynamic effects of water level to feedwater flow characteristic and feedwater flow to the water level characteristic by the pump scoop tube; Simultaneously in Fig. 7 after the triggering of RB trigger pip, after being triggered afterload and reduced the corresponding main steam flow that calculates and can simulate RB and trigger the characteristic of water level by quantity of steam by RB, steam reduces the dynamic change to water level, and in Fig. 7, model dynamic simulation goes out the amount of unbalance that RB triggers rear main steam flow and confluent flow, and carbonated drink amount of unbalance final influence value to steam water-level under the maximum limit definite value that scoop tube allows.
Fig. 8 (a) is load SEA LEVEL VARIATION trend map, 8 (b) steam water-level dynamic perfromance changing trend diagram when being normal varying load during constant only water level settings value upset test, and Fig. 9 is simulation feedwater RB main steam flow and steam water-level temporal variations trend map when occuring.
2) analyze simulation result, Optimal Parameters setting
The analysis Simulation results can calculate the subcritical drum boiler for 600MW, if ignore the impact of circulating ratio, according to the accident that 8.4s can occur under rated capacity " lack of water is done pot " that can be calculated of useful volume between the water level of drum up and down, so the carbonated drink imbalance is larger on the impact of water level.Simulation result shows, scoop tube changes 20% dynamic process can mend the 101t/H feedwater more, is the key that affects the water potential fast and stable.The rapid adjustment speed of scoop tube is the another one key factor, and when the maximal regulated speed of scoop tube reached 2.0%/s, water level can return to setting value and stable fast.The high limit of scoop tube is set 76% according to simulation result, the scoop tube regulations speed is 1.8%/s, and coordinates the boiler specialty to carry out separate unit electric pump maximum output testing experiment, guarantees that the rotating speed of electric pump under above-mentioned numerical value and electric current can be not excessive and trigger the electric protection action.
Re-start the RB test of feed pump according to the parameter of simulation result setting, the disposable success of RB test of new feed pump.Before test, the operating mode of unit is as follows:
Unit load: 579MW
Coordinated control mode: stove is coordinated with machine
Operation mill situation: A, B, C, E, F
Total coal-supplying amount: 226t/h
Pressure: 16.88MPa before machine
Steam water-level: 35.91mm
Combustion chamber draft :-160Pa
Main steam temperature: 540 ℃
Reheat steam temperature: 534 ℃
Scoop tube trace bit: 55%
The 00:37 operations staff stops the B pump on the spot, and after the B pump stopped, the unit cooperative control mode was coordinated automatically to cut to machine to follow mode with machine by stove, and unit load is down to 300MW by 579MW with the speed of 900MW/MIN, tends towards stability after 5 minutes.
Figure 10 is that after adopting newly-installed parameter, actual feed pump RB tests carbonated drink dynamic change real-time tendency analysis chart, and table 2 is newly-installed actual feedwater RB test major parameter value.As shown in figure 10, the Dynamic Matching process of steam and feedwater is to fill out the twill part in figure, and the area of twill part is the steam flow of output greater than the tonnage of the feedwater flow of input, is the unbalanced breach of carbonated drink.The maximal regulated speed of actual scoop tube reaches 2.8%/s, and average adjusted speed is also greater than 1.5%/s, and in this process, electric current and the rotating speed of pump all do not surpass the protection permissible value, in the scope of safety.
Table 2
| Minimum | The highest | Setting value | Unit | |
| Steam water-level | -173 | 35.91 | -- | mm |
| Furnace pressure | -1890 | 1980 | -120 | Pa |
| Primary air pressure | 8.04 | 10.78 | 10.45-8.95 | kPa |
| Pressure before machine | 16.24 | 17.16 | 16.20 | MPa |
| Main stripping temperature | 490 | 540 | -- | ℃ |
| Reheat steam temperature | 492 | 529 | -- | ℃ |
[0104]Figure 11 is feed pump RB l-G simulation test action trend map after the newly-installed parameter of employing, and according to Figure 10,11 as can be known, result and the Simulation results of actual RB test are comparatively approximate.
Embodiment two
The embodiment of the present invention also provides definite device of RB item argument in a kind of electric system, and as shown in figure 12, this device comprises:
The principal parameter dynamic perfromance is set up unit 1, for the dynamic perfromance of setting up according to the principal parameter upset test between unit major parameter corresponding to RB project;
System simulation model is set up unit 2, is used for according to system simulation model corresponding to real work system made RB project;
L-G simulation test performance element 3 is used for carrying out the test of RB project simulation according to the dynamic perfromance between the unit major parameter at system simulation model;
RB item argument determining unit 4 is used for determining the RB item argument according to RB project simulation test findings.
As seen from the above description, set up the unit by the principal parameter dynamic perfromance and first set up dynamic perfromance between RB project and principal parameter, then system simulation model is set up the unit and is set up analogue system, carry out the RB l-G simulation test by the l-G simulation test performance element, determine the RB item argument by RB item argument determining unit according to Simulation results more afterwards, the RB item argument of determining by modeling is than empirical value of the prior art, has preferably on the success ratio of actual RB test and stability and improves.
As shown in figure 13, above-mentioned device also comprises:
Single tripping operation-principal parameter dynamic perfromance acquiring unit 5 that grinds obtains single dynamic perfromance of grinding between tripping operation and described unit major parameter according to single mill tripping operation upset test.
Particularly, the RB project simulation test carried out of above-mentioned l-G simulation test performance element comprise following one of at least: feed pump RB l-G simulation test, stove water pump RB l-G simulation test, coal pulverizer RB l-G simulation test, air preheater RB l-G simulation test, primary air fan RB l-G simulation test, send induced draft fan RB l-G simulation test.
When above-mentioned l-G simulation test performance element was carried out primary air fan RB l-G simulation test, above-mentioned unit major parameter comprised: unit load, main vapour pressure, coal amount, mechanism of qi are transferred valve; Above-mentioned RB item argument comprises: sliding pressure target and sliding pressure speed.As shown in figure 14, the principal parameter dynamic perfromance is set up unit 1 and is comprised:
The first principal parameter dynamic perfromance is set up module 11, is used for obtaining main vapour pressure and unit load dynamic perfromance under the boiler different load according to coal amount upset test;
The second principal parameter dynamic perfromance is set up module 12, is used for obtaining main vapour pressure and unit load dynamic perfromance under the boiler different load according to the valve upset test.
When above-mentioned l-G simulation test performance element was carried out feed pump RB l-G simulation test, above-mentioned unit major parameter comprised: the water yield, steam water-level, quantity of steam; Above-mentioned RB item argument comprises: feed pump scoop tube maximal value and feed pump scoop tube maximum rate.As shown in figure 15, the principal parameter dynamic perfromance is set up unit 1 and can also be comprised:
The 3rd principal parameter dynamic perfromance is set up module 13, is used for obtaining quantity of steam disturbance water drum water level dynamic characteristics according to the quantity of steam upset test;
The 4th principal parameter dynamic perfromance is set up module 14, is used for obtaining scoop tube disturbance water drum water level dynamic characteristics according to the scoop tube upset test.
Concrete above-mentioned each unit, the implementation of each module can with reference to the description in above-described embodiment one, repeat no more herein.And each unit, concrete the arranging of each module can be that unification arranges, also can be single setting, the invention is not restricted to this.
Can be found out by above description, in order to improve the once success rate of thermal power generation unit RB test, the embodiment of the present invention has proposed the optimization method that a kind of new RB tests, based on transient state and the stable state plant characteristic under the different operating modes of fired power generating unit, start with from dynamic modeling, the setting of the several crucial analog quantity of the direct RB of impact success (coal quantitative change rate, main vapour pressure rate of change, sliding pressure desired value, subtract the limit value of coal desired value, Important Auxiliary equipment and limit speed etc.) is optimized setting.Actual parameter change procedure when the prioritization scheme of new RB test occurs by Reality simulation RB is estimated subsequent affect, accurate parameters, thus realize the optimal selection of control program and parameter.By building the RB dynamic model, take full advantage of the advantage of emulation technology, the problem and the former parameter tuning that have solved parameters coupled interference in RB parameter tuning process lean on the difficult point of personnel's experience fully, have overcome the limitation of conventional Tuning; Utilize simultaneously this algorithm to make the optimization of being assessed in advance, deepen continuously of determined RB parameter optimization scheme, thereby realize the minimized optimal effectiveness of expected risk.
For the thermal power generation unit, optimization based on the RB control strategy of dynamic modeling, at the simulink software of using matlab, the dynamic perfromance of system is carried out on the basis of modeling simulation analysis, can improve and analyze and adjust efficient, shortening system adjustment cycle (dynamic process of actual 30-50 minute only needs 3-5 can realize second in matlab), and avoid the tremendous influence of RB unsuccessful test to unit safety stable operation under conventional method; Raising system control accuracy, and complete the complicated calculations that can't complete by manual type and control evaluation metrics; It calculates fast and revises parameter characteristics easily, can compare fully different design proposals and different parameter combinations, thereby realize the optimal selection of control program and parameter.In general, the embodiment of the present invention can allow the focus of site technology the loaded down with trivial details of parameter tuning of getting off quickly out, more energy is placed on the optimization of RB scheme, and simultaneously the modern control programs such as Based Intelligent Control being applied to power plant's robotization as early as possible also has positive effect.
One of ordinary skill in the art will appreciate that all or part of step that realizes in above-described embodiment method can come the relevant hardware of instruction complete by program, this program can be stored in a computer read/write memory medium, such as ROM/RAM, magnetic disc, CD etc.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above is only specific embodiments of the invention; the protection domain that is not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (14)
1. definite method of RB item argument in an electric system, is characterized in that, described method comprises:
Set up dynamic perfromance between unit major parameter corresponding to RB project according to the principal parameter upset test;
System simulation model corresponding to RB project according to the real work system made;
Carry out the test of RB project simulation according to the dynamic perfromance between described unit major parameter in described system simulation model;
Determine described RB item argument according to described RB project simulation test findings.
2. method according to claim 1, is characterized in that, before setting up dynamic perfromance between unit major parameter corresponding to RB project according to the principal parameter upset test, described method also comprises:
Obtain single dynamic perfromance of grinding between tripping operation and described unit major parameter according to single mill tripping operation upset test.
3. method according to claim 2, is characterized in that, described RB project comprise following one of at least:
Feed pump RB, stove water pump RB, coal pulverizer RB, air preheater RB, primary air fan RB, send induced draft fan RB.
4. method according to claim 3, is characterized in that, when described RB project is primary air fan RB,
Described unit major parameter comprises: unit load, main vapour pressure, coal amount, mechanism of qi are transferred valve;
Described RB item argument comprises: sliding pressure target and sliding pressure speed.
5. method according to claim 4, is characterized in that, the described dynamic perfromance of setting up between unit major parameter corresponding to RB project according to the principal parameter upset test comprises:
Obtain main vapour pressure and unit load dynamic perfromance under the boiler different load according to coal amount upset test;
Obtain main vapour pressure and unit load dynamic perfromance under the boiler different load according to the valve upset test.
6. method according to claim 3, is characterized in that, when described RB project is feed pump RB,
Described unit major parameter comprises: the water yield, steam water-level, quantity of steam;
Described RB item argument comprises: feed pump scoop tube maximal value and feed pump scoop tube maximum rate.
7. method according to claim 6, is characterized in that, the described dynamic perfromance of setting up between unit major parameter corresponding to RB project according to the principal parameter upset test comprises:
Obtain quantity of steam disturbance water drum water level dynamic characteristics according to the quantity of steam upset test;
Obtain scoop tube disturbance water drum water level dynamic characteristics according to the scoop tube upset test.
8. definite device of RB item argument in an electric system, is characterized in that, described device comprises:
The principal parameter dynamic perfromance is set up the unit, for the dynamic perfromance of setting up according to the principal parameter upset test between unit major parameter corresponding to RB project;
System simulation model is set up the unit, is used for system simulation model corresponding to RB project according to the real work system made;
The l-G simulation test performance element is used for carrying out the test of RB project simulation according to the dynamic perfromance between described unit major parameter at described system simulation model;
RB item argument determining unit is used for determining described RB item argument according to described RB project simulation test findings.
9. device according to claim 8, is characterized in that, described device also comprises:
Single tripping operation-principal parameter dynamic perfromance acquiring unit that grinds obtains single dynamic perfromance of grinding between tripping operation and described unit major parameter according to single mill tripping operation upset test.
10. device according to claim 9, is characterized in that, the RB project simulation test that described l-G simulation test performance element is carried out comprise following one of at least:
Feed pump RB l-G simulation test, stove water pump RB l-G simulation test, coal pulverizer RB l-G simulation test, air preheater RB l-G simulation test, primary air fan RB l-G simulation test, send induced draft fan RB l-G simulation test.
11. device according to claim 10 is characterized in that, when described l-G simulation test performance element is carried out primary air fan RB l-G simulation test,
Described unit major parameter comprises: unit load, main vapour pressure, coal amount, mechanism of qi are transferred valve;
Described RB item argument comprises: sliding pressure target and sliding pressure speed.
12. device according to claim 11 is characterized in that, described principal parameter dynamic perfromance is set up the unit and is comprised:
The first principal parameter dynamic perfromance is set up module, is used for obtaining main vapour pressure and unit load dynamic perfromance under the boiler different load according to coal amount upset test;
The second principal parameter dynamic perfromance is set up module, is used for obtaining main vapour pressure and unit load dynamic perfromance under the boiler different load according to the valve upset test.
13. device according to claim 10 is characterized in that, when described l-G simulation test performance element is carried out feed pump RB l-G simulation test,
Described unit major parameter comprises: the water yield, steam water-level, quantity of steam;
Described RB item argument comprises: feed pump scoop tube maximal value and feed pump scoop tube maximum rate.
14. device according to claim 13 is characterized in that, described principal parameter dynamic perfromance is set up the unit and is comprised:
The 3rd principal parameter dynamic perfromance is set up module, is used for obtaining quantity of steam disturbance water drum water level dynamic characteristics according to the quantity of steam upset test;
The 4th principal parameter dynamic perfromance is set up module, is used for obtaining scoop tube disturbance water drum water level dynamic characteristics according to the scoop tube upset test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104048646A CN103150413A (en) | 2011-12-07 | 2011-12-07 | Determining method and device for RB (Runback) project parameters in power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104048646A CN103150413A (en) | 2011-12-07 | 2011-12-07 | Determining method and device for RB (Runback) project parameters in power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103150413A true CN103150413A (en) | 2013-06-12 |
Family
ID=48548490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104048646A Pending CN103150413A (en) | 2011-12-07 | 2011-12-07 | Determining method and device for RB (Runback) project parameters in power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103150413A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513640A (en) * | 2013-10-11 | 2014-01-15 | 国家电网公司 | Integral optimization method and system for automatic power generation system of coal-fired unit |
| CN103791485A (en) * | 2014-02-28 | 2014-05-14 | 国家电网公司 | Optimal control method of water supply system of thermal power generating unit |
| CN104091623A (en) * | 2014-07-18 | 2014-10-08 | 中广核工程有限公司 | Nuclear plant unit analog control parameter tuning method, device and system |
| CN104898619A (en) * | 2015-05-15 | 2015-09-09 | 国家电网公司 | Method for automatically adjusting combustion of thermal power generating unit based on DCS and MATLAB |
| CN104914735A (en) * | 2015-05-08 | 2015-09-16 | 华北电力科学研究院有限责任公司 | Fan decoupling control method and fan decoupling control device |
| CN105159250A (en) * | 2015-08-14 | 2015-12-16 | 中国神华能源股份有限公司 | Air quantity and drum water level calculation method/device of power plant DCS |
| CN105929710A (en) * | 2016-04-18 | 2016-09-07 | 中国神华能源股份有限公司 | RB overall working condition simulation test device and method |
| CN106563537A (en) * | 2016-11-07 | 2017-04-19 | 西安交通大学 | Mill load detection method based on vibration signals of throwing-down area and sliding area of surface of barrel |
| WO2017071548A1 (en) * | 2015-10-28 | 2017-05-04 | 广东电网有限责任公司电力科学研究院 | Balance control method and system for abrupt change in device output |
| CN113107832A (en) * | 2021-04-25 | 2021-07-13 | 西安热工研究院有限公司 | Method for testing characteristics of electric feed pump with spoon pipe for adjustment |
-
2011
- 2011-12-07 CN CN2011104048646A patent/CN103150413A/en active Pending
Non-Patent Citations (8)
| Title |
|---|
| 周亮: "2060t/h锅炉建模及运行特性仿真分析", 《中国优秀博硕士学位论文全文数据库 (硕士) 工程科技Ⅱ辑（月刊）》 * |
| 尹峰 等: "火电机组全工况自动RB控制策略的研究与应用", 《浙江电力》 * |
| 张新颖 等: "350MW火电仿真机RB仿真试验研究", 《仪器仪表用户》 * |
| 施海平 等: "300MW机组主要控制对象的动态特性", 《华东电力》 * |
| 李斌 等: "300MW火电机组仿真机的快速减负荷(RB)工况仿真", 《计算机仿真》 * |
| 王玉山 等: "火力发电机组RUNBACK试验研究", 《华北电力技术》 * |
| 祝建飞 等: "1000MW超超临界机组DCS控制系统仿真调试技术研究", 《华东电力》 * |
| 黄卫剑 等: "百万千瓦机组一次风机RB过程汽温控制策略研究", 《现代电力》 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103513640A (en) * | 2013-10-11 | 2014-01-15 | 国家电网公司 | Integral optimization method and system for automatic power generation system of coal-fired unit |
| CN103513640B (en) * | 2013-10-11 | 2015-10-07 | 国家电网公司 | A kind of coal unit automatic electricity generation control system global optimization method and system |
| CN103791485B (en) * | 2014-02-28 | 2015-04-22 | 国家电网公司 | Optimal control method of water supply system of thermal power generating unit |
| CN103791485A (en) * | 2014-02-28 | 2014-05-14 | 国家电网公司 | Optimal control method of water supply system of thermal power generating unit |
| CN104091623A (en) * | 2014-07-18 | 2014-10-08 | 中广核工程有限公司 | Nuclear plant unit analog control parameter tuning method, device and system |
| CN104091623B (en) * | 2014-07-18 | 2017-08-04 | 中广核工程有限公司 | Nuclear power station unit station Analog control parameter tuning method, apparatus and system |
| CN104914735A (en) * | 2015-05-08 | 2015-09-16 | 华北电力科学研究院有限责任公司 | Fan decoupling control method and fan decoupling control device |
| CN104898619A (en) * | 2015-05-15 | 2015-09-09 | 国家电网公司 | Method for automatically adjusting combustion of thermal power generating unit based on DCS and MATLAB |
| CN105159250A (en) * | 2015-08-14 | 2015-12-16 | 中国神华能源股份有限公司 | Air quantity and drum water level calculation method/device of power plant DCS |
| CN105159250B (en) * | 2015-08-14 | 2017-11-07 | 中国神华能源股份有限公司 | The air quantity and steam water-level computational methods and device of a kind of Power Plant DCS System |
| WO2017071548A1 (en) * | 2015-10-28 | 2017-05-04 | 广东电网有限责任公司电力科学研究院 | Balance control method and system for abrupt change in device output |
| CN105929710A (en) * | 2016-04-18 | 2016-09-07 | 中国神华能源股份有限公司 | RB overall working condition simulation test device and method |
| CN106563537A (en) * | 2016-11-07 | 2017-04-19 | 西安交通大学 | Mill load detection method based on vibration signals of throwing-down area and sliding area of surface of barrel |
| CN113107832A (en) * | 2021-04-25 | 2021-07-13 | 西安热工研究院有限公司 | Method for testing characteristics of electric feed pump with spoon pipe for adjustment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103150413A (en) | Determining method and device for RB (Runback) project parameters in power system | |
| CN106382615B (en) | The multiple Switching Logic Control of Reheat Steam Temperature policy validation system and method for extra-supercritical unit | |
| CN109543222B (en) | Load shedding protection simulation method for pressurized water reactor nuclear power unit under different power levels | |
| CN104793610B (en) | Coordination system feedforward controller determination method for parameter and device | |
| CN102193532B (en) | Automatic start-up and shut-down optimization control system of heat-engine plant unit plant | |
| CN103513640A (en) | Integral optimization method and system for automatic power generation system of coal-fired unit | |
| CN104865830A (en) | Dual-intelligent-optimization control method for unit load | |
| CN103853052A (en) | Design method for nuclear power station reactor control system | |
| CN106326534A (en) | Construction method for boiler-steam turbine control model of variable working condition subcritical thermal power generating unit | |
| CN106958465B (en) | A method of for fast and stable rotating speed after Turbo-generator Set removal of load | |
| CN106622620A (en) | Medium-speed coal mill model building method based on system dynamics | |
| CN108469745A (en) | Operating condition in-circuit emulation method and on-line simulation system for gas-fired station | |
| CN113031565A (en) | Method and system for predicting primary frequency modulation power response performance of thermal power generating unit | |
| CN104091623B (en) | Nuclear power station unit station Analog control parameter tuning method, apparatus and system | |
| CN104696944A (en) | Dynamic optimization and parameter estimation integrated method based on load prediction | |
| Jayanthi et al. | Simulation and integrated testing of process models of PFBR operator training simulator | |
| CN105114931A (en) | Control method for modifying overheated steam temperature of boiler | |
| CN102298321A (en) | Energy conservation optimizing method of heat-engine plant ball mill pulverizing system based on sequential pattern mining | |
| CN107084011A (en) | A kind of nuclear steam turbine method for rapid cooling | |
| CN105867349A (en) | Automatic check device, method and system for thermal control logic | |
| Da-hai et al. | Modeling and parameter measurement research pressurized water reactor nuclear power generator's prime mover and governor | |
| CN113094976A (en) | Method and system for data assimilation of steam generator of pressurized water reactor nuclear power plant | |
| US20100298996A1 (en) | Method for operating a power station | |
| Tsai et al. | On study of steam bypass and pressure control system for Lungmen nuclear power plant | |
| Wang et al. | Study of Supercritical Coal Fired Power Plant Dynamic Responses and Control for Grid Code Compliance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130612 |
|
| RJ01 | Rejection of invention patent application after publication |