CN105180138A - Control method and system for power station boiler air and flue gas system - Google Patents
Control method and system for power station boiler air and flue gas system Download PDFInfo
- Publication number
- CN105180138A CN105180138A CN201510708518.5A CN201510708518A CN105180138A CN 105180138 A CN105180138 A CN 105180138A CN 201510708518 A CN201510708518 A CN 201510708518A CN 105180138 A CN105180138 A CN 105180138A
- Authority
- CN
- China
- Prior art keywords
- instruction
- executing agency
- equipment
- valve position
- value
- 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.)
- Granted
Links
Landscapes
- Feedback Control In General (AREA)
Abstract
The invention relates to a control method and system for a power station boiler air and flue gas system. The control method for the power station boiler air and flue gas system comprises the steps that set values and process variable values of controlled parameters of the automatic control system are obtained, and thus control deviation is obtained; actuator equipment valve position control instructions, actuator equipment valve position feedback values and actuator equipment manual/automatic state variables are obtained, and closed-lock increasing instructions and closed-lock decreasing instructions are generated according to preset positive number threshold values, preset negative number threshold values, the actuator equipment valve position control instructions, the actuator equipment valve position feedback values and the actuator equipment manual/automatic state variables; the control deviation is subjected to PID operation processing according to the closed-lock increasing instructions and the closed-lock decreasing instructions, and operation output is obtained; feedforward instructions are obtained, output instructions are generated according to the operation output and the feedforward instructions, and thus actuator equipment valve positions are controlled. Oscillations, caused by faults of an actuator, of the automatic control system can be restrained, and stability and safe operation are improved.
Description
Technical field
The present invention relates to fired power generating unit control technology field, particularly relate to a kind of control method and system of station boiler air and flue system.
Background technology
Station boiler air and flue system refers to supply boiler oil burning required air and combustion product (flue gas) is entered after each heat exchanger and pollutant handling arrangement the pipe-line system of air by chimney, can maintain the stable of furnace pressure and burning, normally the carrying out of heat transfer.
The automatic control of station boiler air and flue system is quite important to the safe operation of unit.Because station boiler air and flue system belongs to fast loop, the measure signal interference amount of boiler air-supply volume, combustion chamber draft and boiler desulfurization booster fan flue gas pressures etc. is more, measuring cell easily blocks, and executing agency's action is delayed and the factors such as rate limit, all can have influence on the stability of automatic control system.And also also exist between the internal system such as air blowing control, air output control, desulphurization devices inlet flue gas Stress control and intercouple and influence each other, more exacerbate the unstability of automatic control system.
The automatic control system of traditional station boiler air and flue system adopts single loop PID to combine the control method of feedforward mostly.But the event that station boiler causes fired power generating unit to trip because the problems such as air measuring, negative pressure measurement and actuator failure cause automatic control system to vibrate happens occasionally, and the control method stability of station boiler air and flue system traditional is as seen not high.And when after automatic control system bad stability, PID regulates and diffusivity vibration easily occurs, and jeopardizes the safe operation of fired power generating unit.
Summary of the invention
Based on this, be necessary for the problems referred to above, a kind of control method and the system that improve the station boiler air and flue system of stability and security are provided.
A control method for station boiler air and flue system, comprises the steps:
Obtain setting value and the process variable value of the controlled parameter of the automatic control system of station boiler air and flue system, and obtain control deviation according to described setting value and described process variable value;
Obtain executing agency's equipment control of valve position instruction of described automatic control system, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment, according to default positive-valued threshold, preset the manual/auto quantity of state generation block increase instruction of negative threshold value, the equipment control of valve position instruction of described executing agency, described executing agency equipment valve position feedback value and described executing agency equipment and block decrease instruction;
According to described block increase instruction and described block decrease instruction, PID arithmetic process is carried out to described control deviation, obtain computing and export;
Obtain the feedforward instruction of described automatic control system, export according to described computing and described feedforward instruction generation output order, and according to described output order, executing agency's equipment valve position is controlled.
A control system for station boiler air and flue system, comprising:
Control deviation acquisition module, for obtaining setting value and the process variable value of the controlled parameter of the automatic control system of station boiler air and flue system, and obtains control deviation according to described setting value and described process variable value;
Blocking order acquisition module, for obtaining executing agency's equipment control of valve position instruction of described automatic control system, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment, according to default positive-valued threshold, presetting the manual/auto quantity of state of negative threshold value, the equipment control of valve position instruction of described executing agency, described executing agency equipment valve position feedback value and described executing agency equipment and generate block increase instruction and block decrease instruction;
PID arithmetic module, for according to described block increase instruction and described block decrease instruction, carries out PID arithmetic process to described control deviation, obtains computing and exports;
Instruction control module, for obtaining the feedforward instruction of described automatic control system, exporting according to described computing and described feedforward instruction generation output order, and controlling executing agency's equipment valve position according to described output order.
The control method of above-mentioned station boiler air and flue system and system, according to the setting value of the automatic control system obtained, process variable value obtains control deviation, according to default positive-valued threshold, preset negative threshold value, the executing agency's equipment control of valve position instruction obtained, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment obtain block increase instruction and block decrease instruction, according to block increase instruction and block decrease instruction, obtain computing after control deviation being had to the PID arithmetic process of block increase and block decrease function to export, export according to computing again and feedforward instruction generation output order, executing agency's equipment valve position of automatic control system is controlled.When there is the change of equipment valve position feedback value trace Bu Shang executing agency of executing agency equipment control of valve position instruction, block increase instruction and block decrease instruction suspend the augment direction of control of valve position instruction respectively or reduce the change in direction.Therefore, export according to the computing obtained in conjunction with block increase instruction and block decrease instruction in PID arithmetic and feedforward instruction generation output order, process variable value can be realized to control near setting value, the automatic control system vibration caused due to actuator failure can be suppressed well, thus raising stability, ensure the safe operation of fired power generating unit simultaneously.
Accompanying drawing explanation
Fig. 1 is the flow chart of the control method of station boiler air and flue system in one embodiment of the invention;
Fig. 2 is the flow chart of the control method of station boiler air and flue system in another embodiment;
Fig. 3 is according to presetting positive-valued threshold, presetting the particular flow sheet that the manual/auto quantity of state of negative threshold value, executing agency's equipment control of valve position instruction, executing agency's equipment valve position feedback value and executing agency's equipment generates block increase instruction and block decrease instruction in an embodiment;
Fig. 4 is that the logic of block increase instruction and block decrease instruction in an embodiment generates schematic diagram;
Fig. 5 is the embodiment schematic diagram of the control method of station boiler air and flue system in an embodiment;
Fig. 6 is the module map of the control system of station boiler air and flue system in one embodiment of the invention;
Fig. 7 is the module map of the control system of station boiler air and flue system in another embodiment;
Fig. 8 is the concrete unit figure of blocking order acquisition module in an embodiment;
Fig. 9 is the specific embodiment conceptual scheme that the present invention is applied to hearth vacuum control system;
Figure 10 is the embodiment conceptual scheme that the present invention is applied to air output control system;
Figure 11 is the embodiment conceptual scheme that the present invention is applied to desulphurization devices inlet flue gas control pressurer system.
Detailed description of the invention
With reference to figure 1, the control method of the station boiler air and flue system in one embodiment of the invention, comprises the following steps.
S110: the setting value and the process variable value that obtain the controlled parameter of the automatic control system of station boiler air and flue system, and obtain control deviation according to setting value and process variable value.
Automatic control system mainly comprises air output control system, hearth vacuum control system, desulphurization devices inlet flue gas control pressurer system and First air main-piping pressure control system.
Controlled parameter is the parameter that automatic control system correspondence controls.The controlled parameter of such as air output control system is air quantity, and the controlled parameter of hearth vacuum control system is furnace pressure, and the controlled parameter of desulphurization devices inlet flue gas control pressurer system is desulphurization devices inlet flue gas pressure.The setting value of controlled parameter is the controlled parameter value pre-set, and process variable value is the controlled parameter value of detection.
S130: be obtained from executing agency's equipment control of valve position instruction of autocontrol system, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment, according to default positive-valued threshold, presets the manual/auto quantity of state acquisition block increase instruction of negative threshold value, executing agency's equipment control of valve position instruction, executing agency's equipment valve position feedback value and executing agency's equipment and block decrease instruction.
Particularly, automatic control system correspondence can have multiple executing agencies equipment, and each executing agency's equipment is respectively to the equipment control of valve position instruction of Ying Youyige executing agency, executing agency's equipment valve position feedback value and a manual/auto quantity of state of executing agency's equipment.In the present embodiment, step S130 obtains executing agency's equipment control of valve position instruction of multiple executing agencies equipment, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment respectively.
Block increase instruction and block decrease instruction are used for when there is the change of equipment valve position feedback value trace Bu Shang executing agency of executing agency equipment control of valve position instruction, suspend the augment direction of control of valve position instruction or reduce the change in direction, the automatic control system vibration caused due to executing agency's equipment fault can be suppressed well, thus ensure the safe operation of fired power generating unit.Meanwhile, blocking function can't affect feedforward amount, thus can not have influence on the response speed of automatic control system.
S150: according to block increase instruction and block decrease instruction, carry out PID arithmetic process to control deviation, obtains computing and exports.
S170: the feedforward instruction being obtained from autocontrol system, exports according to computing and feedforward instruction generates output order, and controls executing agency's equipment valve position according to output order.
Wherein in an embodiment, obtain control deviation according to setting value and process variable value in step S110, comprising:
When automatic control system is reaction,
E＝K*(SP-PV)；
When automatic control system is positive interaction,
E＝K*(PV-SP)；
Wherein, E is control deviation, and K is the dimension conversion coefficient of variable, and SP is setting value, and PV is process variable value.
Wherein, the input quantity of automatic control system can be converted to dimension identical with output quantity by dimension conversion coefficient K, the output dimension of general automatic control system is the dimension % of percentage, and input quantity is correspondingly converted to the dimension % of percentage according to the high/low limit value of input quantity.
The positive/negative effect of automatic control system is decided by the characteristic of control object.Such as when the process variable value PV of automatic control system raises due to disturbance, when the output if desired reducing automatic control system is to eliminate disturbance, then automatic control system is reaction; If desired when the output increasing automatic control system is to eliminate disturbance, then automatic control system is positive interaction.
Wherein in an embodiment, with reference to figure 2, after step S110, before step S150, also comprise step S120.
S120: according to default low threshold parameters and default ceiling value parameter, amplitude limiting processing is carried out to control deviation, upgrade control deviation after obtaining amplitude limit control deviation.Step S120 specifically before step S130, can after step s 130, also can carry out with step S130 simultaneously.
Wherein in an embodiment, step S120 comprises:
E
*＝E(L≤E≤H)；
E
*＝L(E<L)；
E
*＝H(E>H)；
Wherein, E
*for amplitude limit control deviation, E is control deviation, and L is for presetting low threshold parameters, and H is for presetting ceiling value parameter.
Preset ceiling value parameter and preset low threshold parameters and adjust according to the concrete actual conditions of automatic control system, such as setting principle is: after automatic control system is vibrated, and the safety that amplitude limit control deviation causes the instruction of automatic control system change can not endanger process system is as the criterion.Generally, when vibration occurs automatic control system, under the effect of pure ratio, the amplitude of valve fluctuation controls to be advisable ± 10 ~ 20%.
By carrying out amplitude limiting processing to control deviation, the diffusion that the automatic control system of station boiler air and flue system is vibrated can be suppressed well, thus ensure that the safe operation of fired power generating unit.
Wherein in an embodiment, with reference to figure 3, according to presetting positive-valued threshold, presetting the manual/auto quantity of state generation block increase instruction of negative threshold value, executing agency's equipment control of valve position instruction, executing agency's equipment valve position feedback value and executing agency's equipment and block decrease instruction in step S130, comprise step S131 to step S133.
S131: when executing agency's equipment that automatic control system is corresponding is in auto state, relatively whether executing agency's equipment control of valve position instruction is more than or equal to default positive-valued threshold with the difference of corresponding executing agency's equipment valve position feedback value, compares executing agency's equipment control of valve position instruction and whether is less than or equal to default negative threshold value with the difference of corresponding executing agency's equipment valve position feedback value.
Such as, in one embodiment, executing agency's equipment comprises device A and equipment B, and is all in auto state.Whether the difference of executing agency's equipment control of valve position instruction of compare facilities A and executing agency's equipment valve position feedback value of device A is more than or equal to default positive-valued threshold, whether is less than or equal to default negative threshold value; Whether the difference of executing agency's equipment control of valve position instruction of compare facilities B and executing agency's equipment valve position feedback value of equipment B is more than or equal to default positive-valued threshold, whether is less than or equal to default negative threshold value.S132: when executing agency's equipment control of valve position instruction is more than or equal to default positive-valued threshold with the difference of corresponding executing agency's equipment valve position feedback value, exports block increase instruction and is 1 and exports duration to be not more than Preset Time constant.
Such as, in the above-described embodiments, the difference of executing agency's equipment control of valve position instruction of device A and executing agency's equipment valve position feedback value of device A is more than or equal to default positive-valued threshold, then exporting block increase instruction is 1.The maintenance duration that the output duration of block increase instruction specifically can be greater than default positive-valued threshold according to executing agency's equipment control of valve position instruction and the difference of corresponding executing agency's equipment valve position feedback value decides.Such as, if the maintenance duration that executing agency's equipment control of valve position instruction is greater than default positive-valued threshold with the difference of corresponding executing agency's equipment valve position feedback value is greater than Preset Time constant, then the output duration of block increase instruction is Preset Time constant, otherwise it is equal that the output duration of block increase instruction is the maintenance duration that executing agency's equipment control of valve position instruction and the difference of corresponding executing agency's equipment valve position feedback value be greater than default positive-valued threshold.S133: when executing agency's equipment control of valve position instruction is less than or equal to default negative threshold value with the difference of corresponding executing agency's equipment valve position feedback value, exports block decrease instruction and is 1 and exports duration to be not more than Preset Time constant.
Such as, in the above-described embodiments, the difference of executing agency's equipment control of valve position instruction of equipment B and executing agency's equipment valve position feedback value of equipment B is less than or equal to default negative threshold value, then exporting block increase instruction is 1.The output duration obtaining value method of block decrease instruction and the output duration obtaining value method of block increase instruction similar, do not repeat at this.
Default positive-valued threshold can get 5 ~ 10%, namely open in large process in executing agency's equipment control of valve position instruction, when the change of equipment valve position feedback value trace Bu Shang executing agency of executing agency equipment control of valve position instruction and difference more than 5 ~ 10% time, export block increase instruction.
Preset negative threshold value and can get-5 ~-10%, namely in the process turned down in executing agency's equipment control of valve position instruction, when the change of equipment valve position feedback value trace Bu Shang executing agency of executing agency equipment control of valve position instruction and difference exceedes-5 ~-10% time, export block decrease instruction.
Preset Time constant can get 5 seconds, i.e. the output duration of block increase instruction or block decrease instruction is less than or equal to 5 seconds, suspends the augment direction of control of valve position instruction in 5 seconds or reduces the change in direction.By arranging Preset Time constant, the normal work having influence on automatic control system due to the signal chromic trouble of executing agency's equipment valve position can be prevented.
Wherein in an embodiment, step S150 carries out PID arithmetic according to block increase instruction and block decrease instruction to control deviation, pid algorithm adopts incremental computation method, is specially: when block increase instruction and block decrease instruction are 0, and computing output is carried out computing by normal pid algorithm and obtained.When block increase instruction or block decrease instruction are 1, be kept at the PID arithmetic Output rusults of the upper execution cycle computing occurring block increase command signal or block decrease command signal rising edge time, as block increase ceiling value or the low limit value of block decrease; Carry out computing by normal pid algorithm, if operation result is higher than block increase ceiling value or lower than the low limit value of block decrease, then final computing exports as block increase ceiling value or the low limit value of block decrease, otherwise computing exports as normal pid algorithm operation result.
Particularly, in the present embodiment, step S150 is specially:
When block increase instruction and block decrease instruction are 0,
u(kT)＝u(kT-T)+△u(kT)；
CO＝u(kT)；
When block increase instruction is 1,
HL
bI=u (kT-T) (BI (kT)=1 and BI (kT-T)=0);
HL
bI=HL (BI (kT)=0 and BI (kT-T)=1);
u(kT)＝u(kT-T)+△u(kT)(u(kT-T)+△u(kT)≤HL
BI)；
u(kT)＝HL
BI(u(kT-T)+△u(kT)>HL
BI)；
CO＝u(kT)；
When block decrease instruction is 1,
LL
bD=u (kT-T) (BD (kT)=1 and BD (kT-T)=0);
LL
bD=LL (BD (kT)=0 and BD (kT-T)=1);
u(kT)＝u(kT-T)+△u(kT)(u(kT-T)+△u(kT)≥LL
BD)；
u(kT)＝LL
BD(u(kT-T)+△u(kT)<LL
BD)；
CO＝u(kT)；
Wherein, k represents this execution cycle, and T is the execution cycle time of controlling of sampling, K
pfor the proportional gain parameter of PID arithmetic, the control deviation that e (kT) inputs for this execution cycle, the control deviation that e (kT-T) inputs for last execution cycle, T
ifor the parameter time of integration of PID arithmetic, T
dfor parameter derivative time of PID arithmetic, the control deviation that e (kT-2T) inputs for upper second time execution cycle, the increment size that △ u (kT) obtains for this execution cycle PID arithmetic, the operation result that u (kT) obtains for this execution cycle PID arithmetic, the operation result that u (kT-T) obtains for last execution cycle PID arithmetic, CO is that computing exports, HL
bIfor block increase ceiling value, HL is the ceiling value that PID arithmetic exports, the block increase command value that BI (kT) is this execution cycle, the block increase instruction that BI (kT-T) is last execution cycle, LL
bDfor the low limit value of block decrease, LL is the low limit value that PID arithmetic exports, the block decrease instruction that BD (kT) is this execution cycle, the block decrease instruction that BD (kT-T) is last execution cycle.
Wherein in an embodiment, export according to computing in step S170 and feedforward instruction generation output order, be specially:
OUT＝CO+FF；
Wherein, OUT is output order, and CO is that computing exports, and FF is feedforward instruction.
The control method of above-mentioned station boiler air and flue system, according to the setting value of the automatic control system obtained, process variable value obtains control deviation, according to default positive-valued threshold, preset negative threshold value, the executing agency's equipment control of valve position instruction obtained, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment obtain block increase instruction and block decrease instruction, according to block increase instruction and block decrease instruction, obtain computing after control deviation being had to the PID arithmetic process of block increase and block decrease function to export, export according to computing again and feedforward instruction generation output order, executing agency's equipment valve position of automatic control system is controlled.When there is the change of equipment valve position feedback value trace Bu Shang executing agency of executing agency equipment control of valve position instruction, block increase instruction and block decrease instruction suspend the augment direction of control of valve position instruction respectively or reduce the change in direction.Therefore, export according to the computing obtained in conjunction with block increase instruction and block decrease instruction in PID arithmetic and feedforward instruction generation output order, process variable value can be realized to control near setting value, the automatic control system vibration caused due to actuator failure can be suppressed well, thus raising stability, ensure the safe operation of fired power generating unit simultaneously.
With reference to figure 4, be the embodiment conceptual scheme adopting logical operation to generate block increase instruction, block decrease instruction, control same parameter by 2 complete equipments, wherein, 2 complete equipments are respectively No. 1 equipment and No. 2 equipment.
The block increase instruction BI of No. 1 equipment and the generation principle of block decrease instruction BD as follows: the executing agency control of valve position instruction SET1_C of No. 1 equipment deducts the executing agency valve position feedback value SET1_P of No. 1 equipment, obtains the control deviation SET_C of No. 1 equipment
e, i.e. SET_C
e=SET_C-SET_P.By positive-valued threshold comparison operation block H1/ (presetting positive-valued threshold is 5), negative threshold value comparison operation block/L1 (presetting negative threshold value is-5) the control deviation SET_C to No. 1 equipment
ecarry out computing.Result one tunnel of positive-valued threshold comparison operation block H1/ deliver to the 1st with the input of door operation blocks B, another road then after a pulse signal operation blocks A (Pulse-Time Parameters is 5 seconds), also deliver to the 1st with the input of door operation blocks B; The SET1_AUTO signal of executing agency's auto state amount of No. 1 equipment also deliver to the 1st with the input of door operation blocks B, 1st is exactly No. 1 equipment with the output of door operation blocks B block increase outputs signal, again after the 1st or an operation blocks OR, obtain block increase instruction BI.Result one tunnel of negative threshold value comparison operation block/L1 deliver to the 2nd with the input of door operation blocks B, another road then after another pulse signal operation blocks A (Pulse-Time Parameters is 5 seconds), also deliver to the 2nd with the input of door operation blocks B; The SET1_AUTO signal of executing agency's auto state amount of No. 1 equipment also deliver to the 2nd with the input of door operation blocks B, 2nd is exactly No. 1 equipment with the output of door operation blocks B block decrease outputs signal, again after the 2nd or an operation blocks OR, obtain block decrease instruction BD.
Block increase instruction BI and the generation principle of block decrease instruction BD and the similar of No. 1 equipment of No. 2 equipment, do not repeat at this.Wherein, SET2_C is executing agency's control of valve position instruction of No. 2 equipment, and SET2_P is executing agency's valve position feedback value of No. 2 equipment, and SET2_AUTO is executing agency's auto state amount of No. 2 equipment, SET2_C
eit is the control deviation of No. 2 equipment.
With reference to figure 5, locking type PID controller is used for PID arithmetic, block increase instruction BI and block decrease instruction BD is incorporated into BI input and the BD input of locking type PID controller.Control deviation E is obtained according to setting value SP, the process variable value PV of automatic control system and the dimension conversion coefficient K of variable.Then amplitude limiting processing is carried out to control deviation E and obtain amplitude limit control deviation E
*.Then in conjunction with block increase instruction BI and block decrease instruction BD, to amplitude limit control deviation E
*obtain computing after carrying out having the PID arithmetic process of block increase and block decrease function and export CO, after computing output CO is superimposed with feedforward instruction FF again, as the output order OUT of controller, executing agency's equipment valve position of boiler wind and smoke automatic control system is controlled, thus process variable value is controlled near setting value.
With reference to figure 6, the control system of the station boiler air and flue system in one embodiment of the invention, comprises control deviation acquisition module 110, blocking order acquisition module 130, PID arithmetic module 150 and instruction control module 170.
Control deviation acquisition module 110 for being obtained from setting value and the process variable value of the controlled parameter of autocontrol system, and obtains control deviation according to setting value and process variable value.
Automatic control system mainly comprises air output control system, hearth vacuum control system, desulphurization devices inlet flue gas control pressurer system and First air main-piping pressure control system.
Controlled parameter is the parameter that automatic control system correspondence controls.The controlled parameter of such as air output control system is air quantity, and the controlled parameter of hearth vacuum control system is furnace pressure, and the controlled parameter of desulphurization devices inlet flue gas control pressurer system is desulphurization devices inlet flue gas pressure.The setting value of controlled parameter is the controlled parameter value pre-set, and process variable value is the controlled parameter value of detection.
Blocking order acquisition module 130, for being obtained from executing agency's equipment control of valve position instruction of autocontrol system, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment, according to default positive-valued threshold, being preset the manual/auto quantity of state of negative threshold value, executing agency's equipment control of valve position instruction, executing agency's equipment valve position feedback value and executing agency's equipment and is generated block increase instruction and block decrease instruction.
Particularly, automatic control system correspondence can have multiple executing agencies equipment, and each executing agency's equipment is respectively to the equipment control of valve position instruction of Ying Youyige executing agency, executing agency's equipment valve position feedback value and a manual/auto quantity of state of executing agency's equipment.In the present embodiment, step S130 obtains executing agency's equipment control of valve position instruction of multiple executing agencies equipment, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment respectively.
Block increase instruction and block decrease instruction are used for when there is the change of equipment valve position feedback value trace Bu Shang executing agency of executing agency equipment control of valve position instruction, suspend the augment direction of control of valve position instruction or reduce the change in direction, the automatic control system vibration caused due to executing agency's equipment fault can be suppressed well, thus ensure the safe operation of fired power generating unit.Meanwhile, blocking function can't affect feedforward amount, thus can not have influence on the response speed of automatic control system.
PID arithmetic module 150, for according to block increase instruction and block decrease instruction, carries out PID arithmetic process to control deviation, obtains computing and exports.
Instruction control module 170, for being obtained from the feedforward instruction of autocontrol system, exporting according to computing and feedforward instruction generation output order, and controls executing agency's equipment valve position according to output order.
Wherein in an embodiment, when automatic control system is reaction, control deviation acquisition module 110 basis:
E＝K*(SP-PV)；
Obtain control deviation.
When automatic control system is positive interaction, control deviation acquisition module 110 basis:
E＝K*(PV-SP)；
Obtain control deviation.
Wherein, E is control deviation, and K is the dimension conversion coefficient of variable, and SP is setting value, and PV is process variable value.
Wherein, the input quantity of automatic control system can be converted to dimension identical with output quantity by dimension conversion coefficient K, the output dimension of general automatic control system is the dimension % of percentage, and input quantity is correspondingly converted to the dimension % of percentage according to the high/low limit value of input quantity.
The positive/negative effect of automatic control system is decided by the characteristic of control object.Such as when the process variable value PV of automatic control system raises due to disturbance, when the output if desired reducing automatic control system is to eliminate disturbance, then automatic control system is reaction; If desired when the output increasing automatic control system is to eliminate disturbance, then automatic control system is positive interaction.
Wherein in an embodiment, with reference to figure 7, the control system of station boiler air and flue system also comprises control deviation clipping module 120, for carrying out amplitude limiting processing according to default low threshold parameters and default ceiling value parameter to control deviation, upgrades control deviation after obtaining amplitude limit control deviation.
Particularly, in the present embodiment, control deviation clipping module 120 basis:
E
*＝E(L≤E≤H)；
E
*＝L(E<L)；
E
*＝H(E>H)；
Carry out amplitude limiting processing, after obtaining amplitude limit control deviation, upgrade control deviation.Wherein, E
*for amplitude limit control deviation, E is control deviation, and L is for presetting low threshold parameters, and H is for presetting ceiling value parameter.
Preset ceiling value parameter and preset low threshold parameters and adjust according to the concrete actual conditions of automatic control system, such as setting principle is: after automatic control system is vibrated, and the safety that amplitude limit control deviation causes the instruction of automatic control system change can not endanger process system is as the criterion.Generally, when vibration occurs automatic control system, under the effect of pure ratio, the amplitude of valve fluctuation controls to be advisable ± 10 ~ 20%.
By carrying out amplitude limiting processing to control deviation, the diffusion that the automatic control system of station boiler air and flue system is vibrated can be suppressed well, thus ensure that the safe operation of fired power generating unit.
Wherein in an embodiment, with reference to figure 8, blocking order acquisition module 130 comprises collecting unit 131, comparing unit 133, block increase instruction output unit 135 and block decrease instruction output unit 137.
Collecting unit 131 is for being obtained from executing agency's equipment control of valve position instruction of autocontrol system, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment.When comparing unit 133 is in auto state for executing agency's equipment corresponding in automatic control system, relatively whether executing agency's equipment control of valve position instruction is more than or equal to default positive-valued threshold with the difference of corresponding executing agency's equipment valve position feedback value, compares executing agency's equipment control of valve position instruction and whether is less than or equal to default negative threshold value with the difference of corresponding executing agency's equipment valve position feedback value.
Such as, in one embodiment, executing agency's equipment comprises device A and equipment B, and is all in auto state.Whether the difference of executing agency's equipment control of valve position instruction of compare facilities A and executing agency's equipment valve position feedback value of device A is more than or equal to default positive-valued threshold, whether is less than or equal to default negative threshold value; Whether the difference of executing agency's equipment control of valve position instruction of compare facilities B and executing agency's equipment valve position feedback value of equipment B is more than or equal to default positive-valued threshold, whether is less than or equal to default negative threshold value.
Block increase instruction output unit 135, for when executing agency's equipment control of valve position instruction is more than or equal to default positive-valued threshold with the difference of corresponding executing agency's equipment valve position feedback value, exports block increase instruction and is 1 and exports duration to be not more than Preset Time constant.
Such as, in the above-described embodiments, the difference of executing agency's equipment control of valve position instruction of device A and executing agency's equipment valve position feedback value of device A is more than or equal to default positive-valued threshold, then exporting block increase instruction is 1.The maintenance duration that the output duration of block increase instruction specifically can be greater than default positive-valued threshold according to executing agency's equipment control of valve position instruction and the difference of corresponding executing agency's equipment valve position feedback value decides.Such as, if the maintenance duration that executing agency's equipment control of valve position instruction is greater than default positive-valued threshold with the difference of corresponding executing agency's equipment valve position feedback value is greater than Preset Time constant, then the output duration of block increase instruction is Preset Time constant, otherwise it is equal that the output duration of block increase instruction is the maintenance duration that executing agency's equipment control of valve position instruction and the difference of corresponding executing agency's equipment valve position feedback value be greater than default positive-valued threshold.
Block decrease instruction output unit 137, for when executing agency's equipment control of valve position instruction is less than or equal to default negative threshold value with the difference of corresponding executing agency's equipment valve position feedback value, exports block decrease instruction and is 1 and exports duration to be not more than Preset Time constant.
Such as, in the above-described embodiments, the difference of executing agency's equipment control of valve position instruction of equipment B and executing agency's equipment valve position feedback value of equipment B is less than or equal to default negative threshold value, then exporting block increase instruction is 1.The output duration obtaining value method of block decrease instruction and the output duration obtaining value method of block increase instruction similar, do not repeat at this.
Default positive-valued threshold can get 5 ~ 10%, namely open in large process in executing agency's equipment control of valve position instruction, when the change of equipment valve position feedback value trace Bu Shang executing agency of executing agency equipment control of valve position instruction and difference more than 5 ~ 10% time, export block increase instruction.
Preset negative threshold value and can get-5 ~-10%, namely in the process turned down in executing agency's equipment control of valve position instruction, when the change of equipment valve position feedback value trace Bu Shang executing agency of executing agency equipment control of valve position instruction and difference exceedes-5 ~-10% time, export block decrease instruction.
Preset Time constant can get 5 seconds, i.e. the output duration of block increase instruction or block decrease instruction is less than or equal to 5 seconds, suspends the augment direction of control of valve position instruction in 5 seconds or reduces the change in direction.By arranging Preset Time constant, the normal work having influence on automatic control system due to the signal chromic trouble of executing agency's equipment valve position can be prevented.
Wherein in an embodiment, PID arithmetic module 150 carries out PID arithmetic according to block increase instruction and block decrease instruction to control deviation, pid algorithm adopts incremental computation method, be specially: when block increase instruction and block decrease instruction are 0, computing output is carried out computing by normal pid algorithm and is obtained.When block increase instruction or block decrease instruction are 1, be kept at the PID arithmetic Output rusults of the upper execution cycle computing occurring block increase command signal or block decrease command signal rising edge time, as block increase ceiling value or the low limit value of block decrease; Carry out computing by normal pid algorithm, if operation result is higher than block increase ceiling value or lower than the low limit value of block decrease, then final computing exports as block increase ceiling value or the low limit value of block decrease, otherwise computing exports as normal pid algorithm operation result.
In the present embodiment, PID arithmetic module 150 specifically can adopt following formula to carry out PID arithmetic.
When block increase instruction and block decrease instruction are 0,
u(kT)＝u(kT-T)+△u(kT)；
CO＝u(kT)；
When block increase instruction is 1,
HL
bI=u (kT-T) (BI (kT)=1 and BI (kT-T)=0);
HL
bI=HL (BI (kT)=0 and BI (kT-T)=1);
u(kT)＝u(kT-T)+△u(kT)(u(kT-T)+△u(kT)≤HL
BI)；
u(kT)＝HL
BI(u(kT-T)+△u(kT)>HL
BI)；
CO＝u(kT)；
When block decrease instruction is 1,
LL
bD=u (kT-T) (BD (kT)=1 and BD (kT-T)=0);
LL
bD=LL (BD (kT)=0 and BD (kT-T)=1);
u(kT)＝u(kT-T)+△u(kT)(u(kT-T)+△u(kT)≥LL
BD)；
u(kT)＝LL
BD(u(kT-T)+△u(kT)<LL
BD)；
CO＝u(kT)；
Wherein, k represents this execution cycle, and T is the execution cycle time of controlling of sampling, K
pfor the proportional gain parameter of PID arithmetic, the control deviation that e (kT) inputs for this execution cycle, the control deviation that e (kT-T) inputs for last execution cycle, T
ifor the parameter time of integration of PID arithmetic, T
dfor parameter derivative time of PID arithmetic, the control deviation that e (kT-2T) inputs for upper second time execution cycle, the increment size that △ u (kT) obtains for this execution cycle PID arithmetic, the operation result that u (kT) obtains for this execution cycle PID arithmetic, the operation result that u (kT-T) obtains for last execution cycle PID arithmetic, CO is that computing exports, HL
bIfor block increase ceiling value, HL is the ceiling value that PID arithmetic exports, the block increase command value that BI (kT) is this execution cycle, the block increase instruction that BI (kT-T) is last execution cycle, LL
bDfor the low limit value of block decrease, LL is the low limit value that PID arithmetic exports, the block decrease instruction that BD (kT) is this execution cycle, the block decrease instruction that BD (kT-T) is last execution cycle.
Wherein in an embodiment, export according to computing in instruction control module 170 and feedforward instruction generation output order, be specially:
OUT＝CO+FF；
Wherein, OUT is output order, and CO is that computing exports, and FF is feedforward instruction.
The control system of above-mentioned station boiler air and flue system, control deviation acquisition module 110 is according to the setting value of the automatic control system obtained, process variable value obtains control deviation, blocking order acquisition module 130 is according to default positive-valued threshold, preset negative threshold value, the executing agency's equipment control of valve position instruction obtained, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment obtain block increase instruction and block decrease instruction, PID arithmetic module 150 is according to block increase instruction and block decrease instruction, obtain computing after control deviation being had to the PID arithmetic process of block increase and block decrease function to export, instruction control module 170 exports according to computing and feedforward instruction generates output order, executing agency's equipment valve position of automatic control system is controlled.When there is the change of equipment valve position feedback value trace Bu Shang executing agency of executing agency equipment control of valve position instruction, block increase instruction and block decrease instruction suspend the augment direction of control of valve position instruction respectively or reduce the change in direction.Therefore, export according to the computing obtained in conjunction with block increase instruction and block decrease instruction in PID arithmetic and feedforward instruction generation output order, process variable value can be realized to control near setting value, the automatic control system vibration caused due to actuator failure can be suppressed well, thus raising stability, ensure the safe operation of fired power generating unit simultaneously.
The control method of station boiler air and flue system of the present invention can at DCS (DistributedControlSystem, dcs), programming realization on PLC (ProgrammableLogicController, programmable logic controller (PLC)), single-chip microcomputer or computer.
With reference to figure 9, for the present invention is applied to a specific embodiment conceptual scheme of hearth vacuum control system, wherein " air and flue system controller " is the grand algorithmic block (hereinafter referred to as No. 2 grand algorithmic blocks) after encapsulating according to the control method of station boiler air and flue system of the present invention; " blocking function judges " as block increase instruction according to the present invention and block decrease instruction generation method encapsulate after a grand algorithmic block (hereinafter referred to as No. 1 grand algorithmic block).Furnace pressure measured value FURNPRS being connected to the PV input of No. 2 grand algorithmic blocks, is process variable value; By furnace pressure setting value FURNPRS
sbeing connected to the SP input of No. 2 grand algorithmic blocks, is setting value; Pressure fan stator instruction mean value FDF, after one dimension polygronal function f (x), is connected to the FF input of No. 2 grand algorithmic blocks, is feedforward instruction.The output order OUT of No. 2 grand algorithmic blocks separates two-way, after the output BIAS that one tunnel is superimposed with " stator is biased arranges loop ", obtain the automatic control instruction IDA_C of A side air-introduced machine stator, after another road deducts the output BIAS of " stator arranges loop ", obtain the automatic control instruction IDB_C of B side air-introduced machine stator.The automatic control instruction IDA_C of A side air-introduced machine stator separates two-way, and the SET1_C input of No. 1 grand algorithmic block is delivered on a road, is executing agency's equipment control of valve position instruction, and air-introduced machine A stator hand behaviour station M/A is delivered on another road.The output order IDA_CO of air-introduced machine A stator hand behaviour station M/A outputs to scene by AO passage, controls air-introduced machine A inlet guide vane aperture; The auto state output quantity of air-introduced machine A stator hand behaviour station M/A is connected to the SET1_AUTO input of No. 1 grand algorithmic block, is executing agency's equipment auto state amount; The position feed back signal IDA_POSITION of air-introduced machine A inlet guide vane is connected to the SET1_P input of No. 1 grand algorithmic block, is executing agency's equipment valve position feedback value.The automatic control instruction IDB_C of B side air-introduced machine stator separates two-way, the SET2_C input of No. 1 grand algorithmic block is delivered on one tunnel, for executing agency's equipment control of valve position instruction, air-introduced machine B stator hand behaviour station M/A is delivered on another road, the output order IDB_CO of air-introduced machine B stator hand behaviour station M/A outputs to scene by AO passage, controls air-introduced machine B inlet guide vane aperture; The auto state output quantity of air-introduced machine B stator hand behaviour station M/A is connected to the SET2_AUTO input of No. 1 grand algorithmic block, is executing agency's equipment auto state amount; The position feed back signal IDB_POSITION of air-introduced machine B inlet guide vane is connected to the SET2_P input of No. 1 grand algorithmic block, is executing agency's equipment valve position feedback value.The BI output signal of No. 1 grand algorithmic block is connected to the BI input of No. 2 grand algorithmic blocks; The BD output signal of No. 1 grand algorithmic block is connected to the BD input of No. 2 grand algorithmic blocks.
With reference to Figure 10, for the present invention is applied to an embodiment conceptual scheme of air output control system, wherein, the setting value of controlled parameter is air quantity instruction AIR_FLOW_SET, the feedforward instruction of air output control system is produced after one dimension polygronal function f (x) by air quantity instruction, similar to Fig. 9 of all the other connected modes, does not repeat at this.Wherein, AIR_FLOW refers to total blast volume measured value, is process variable value; FDA_C is the automatic control instruction of A Lateral supply machine stator, FDB_C is the automatic control instruction of B Lateral supply machine stator, FDA_CO is the output order of pressure fan A stator hand behaviour station M/A, FDB_CO is the output order of air-introduced machine B stator hand behaviour station M/A, FDA_POSITION is the position feed back signal of pressure fan A inlet guide vane, and FDB_POSITION is the position feed back signal of pressure fan B inlet guide vane.Adopt the mode of air quantity instruction feedforward, the response speed of air quantity control system can be accelerated, thus the effect of PID control can be weakened, improve the stability of air output control system.
With reference to Figure 11, for the present invention is applied to an embodiment conceptual scheme of desulphurization devices inlet flue gas control pressurer system.Only have a booster fan to control desulphurization devices inlet flue gas pressure in Figure 11, SET2_C, SET2_AUTO, SET2_P signal of No. 1 grand algorithmic block is connected to constant 0.Wherein, the feedforward instruction of desulphurization devices inlet flue gas control pressurer system is produced after one dimension polygronal function f (x) by air output control averaging instruction IDF_FF.PRESS desulphurization devices inlet flue gas pressure measuring value, for the process variable value of desulphurization devices inlet flue gas control pressurer system, PRESS_SET is desulphurization devices inlet flue gas pressure set points, for the setting value of desulphurization devices inlet flue gas control pressurer system, FFD_CO is the output order of desulphurization devices stator hand behaviour station M/A, and FFD_POSITION is the position feed back signal of desulphurization devices inlet guide vane.Similar to Fig. 9 of all the other connected modes, does not repeat at this.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this description is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a control method for station boiler air and flue system, is characterized in that, comprises the steps:
Obtain setting value and the process variable value of the controlled parameter of the automatic control system of station boiler air and flue system, and obtain control deviation according to described setting value and described process variable value;
Obtain executing agency's equipment control of valve position instruction of described automatic control system, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment, according to default positive-valued threshold, preset the manual/auto quantity of state generation block increase instruction of negative threshold value, the equipment control of valve position instruction of described executing agency, described executing agency equipment valve position feedback value and described executing agency equipment and block decrease instruction;
According to described block increase instruction and described block decrease instruction, PID arithmetic process is carried out to described control deviation, obtain computing and export;
Obtain the feedforward instruction of described automatic control system, export according to described computing and described feedforward instruction generation output order, and according to described output order, executing agency's equipment valve position is controlled.
2. the control method of station boiler air and flue system according to claim 1, is characterized in that, described according to described setting value and described process variable value acquisition control deviation, comprising:
When described automatic control system is reaction,
E＝K*(SP-PV)；
When described automatic control system is positive interaction,
E＝K*(PV-SP)；
Wherein, E is described control deviation, and K is the dimension conversion coefficient of variable, and SP is described setting value, and PV is described process variable value.
3. the control method of station boiler air and flue system according to claim 1, it is characterized in that, the setting value of the controlled parameter of the automatic control system of described acquisition station boiler air and flue system and process variable value, and after obtaining control deviation according to described setting value and described process variable value, described according to described block increase instruction and described block decrease instruction, PID arithmetic process is carried out to described control deviation, before obtaining computing output, also comprises:
According to default low threshold parameters and default ceiling value parameter, amplitude limiting processing is carried out to described control deviation, after obtaining amplitude limit control deviation, upgrade described control deviation.
4. the control method of station boiler air and flue system according to claim 3, it is characterized in that, described basis presets low threshold parameters and default ceiling value parameter carries out amplitude limiting processing to described control deviation, upgrades described control deviation, be specially after obtaining amplitude limit control deviation:
E
*＝E(L≤E≤H)；
E
*＝L(E<L)；
E
*＝H(E>H)；
Wherein, E
*for described amplitude limit control deviation, E is described control deviation, and L is described default low threshold parameters, and H is described default ceiling value parameter.
5. the control method of station boiler air and flue system according to claim 1, it is characterized in that, described basis is preset positive-valued threshold, is preset the manual/auto quantity of state generation block increase instruction of negative threshold value, the equipment control of valve position instruction of described executing agency, described executing agency equipment valve position feedback value and described executing agency equipment and block decrease instruction, comprising:
When executing agency's equipment that described automatic control system is corresponding is in auto state, whether the equipment control of valve position instruction of more described executing agency is more than or equal to described default positive-valued threshold with the difference of corresponding executing agency's equipment valve position feedback value, and whether the equipment control of valve position instruction of more described executing agency is less than or equal to described default negative threshold value with the difference of corresponding executing agency's equipment valve position feedback value;
When the equipment control of valve position instruction of described executing agency is more than or equal to described default positive-valued threshold with the difference of corresponding executing agency's equipment valve position feedback value, exports described block increase instruction and be 1 and export duration to be not more than Preset Time constant;
When the equipment control of valve position instruction of described executing agency is less than or equal to described default negative threshold value with the difference of corresponding executing agency's equipment valve position feedback value, exports described block decrease instruction and be 1 and export duration to be not more than described Preset Time constant.
6. the control method of station boiler air and flue system according to claim 1, is characterized in that, describedly carries out PID arithmetic process according to described block increase instruction and described block decrease instruction to described control deviation, obtains computing and exports, be specially:
When described block increase instruction and described block decrease instruction are 0,
u(kT)＝u(kT-T)+△u(kT)；
CO＝u(kT)；
When described block increase instruction is 1,
HL
bI=u (kT-T) (BI (kT)=1 and BI (kT-T)=0);
HL
bI=HL (BI (kT)=0 and BI (kT-T)=1);
u(kT)＝u(kT-T)+△u(kT)(u(kT-T)+△u(kT)≤HL
BI)；
u(kT)＝HL
BI(u(kT-T)+△u(kT)>HL
BI)；
CO＝u(kT)；
When described block decrease instruction is 1,
LL
bD=u (kT-T) (BD (kT)=1 and BD (kT-T)=0);
LL
bD=LL (BD (kT)=0 and BD (kT-T)=1);
u(kT)＝u(kT-T)+△u(kT)(u(kT-T)+△u(kT)≥LL
BD)；
u(kT)＝LL
BD(u(kT-T)+△u(kT)<LL
BD)；
CO＝u(kT)；
Wherein, k represents this execution cycle, and T is the execution cycle time of controlling of sampling, K
pfor the proportional gain parameter of PID arithmetic, the described control deviation that e (kT) inputs for this execution cycle, the described control deviation that e (kT-T) inputs for last execution cycle, T
ifor the parameter time of integration of PID arithmetic, T
dfor parameter derivative time of PID arithmetic, the described control deviation that e (kT-2T) inputs for upper second time execution cycle, the increment size that △ u (kT) obtains for this execution cycle PID arithmetic, the operation result that u (kT) obtains for this execution cycle PID arithmetic, the operation result that u (kT-T) obtains for last execution cycle PID arithmetic, CO is that described computing exports, HL
bIfor block increase ceiling value, HL is the ceiling value that PID arithmetic exports, the block increase instruction that BI (kT) is this execution cycle, the block increase instruction that BI (kT-T) is last execution cycle, LL
bDfor the low limit value of block decrease, LL is the low limit value that PID arithmetic exports, the block decrease instruction that BD (kT) is this execution cycle, the block decrease instruction that BD (kT-T) is last execution cycle.
7. the control method of station boiler air and flue system according to claim 1, is characterized in that, described according to described computing output and described feedforward instruction generation output order, is specially:
OUT＝CO+FF；
Wherein, OUT is described output order, and CO is that described computing exports, and FF is described feedforward instruction.
8. a control system for station boiler air and flue system, is characterized in that, comprising:
Control deviation acquisition module, for obtaining setting value and the process variable value of the controlled parameter of the automatic control system of station boiler air and flue system, and obtains control deviation according to described setting value and described process variable value;
Blocking order acquisition module, for obtaining executing agency's equipment control of valve position instruction of described automatic control system, executing agency's equipment valve position feedback value and the manual/auto quantity of state of executing agency's equipment, according to default positive-valued threshold, presetting the manual/auto quantity of state of negative threshold value, the equipment control of valve position instruction of described executing agency, described executing agency equipment valve position feedback value and described executing agency equipment and generate block increase instruction and block decrease instruction;
PID arithmetic module, for according to described block increase instruction and described block decrease instruction, carries out PID arithmetic process to described control deviation, obtains computing and exports;
Instruction control module, for obtaining the feedforward instruction of described automatic control system, exporting according to described computing and described feedforward instruction generation output order, and controlling executing agency's equipment valve position according to described output order.
9. the control system of station boiler air and flue system according to claim 8, is characterized in that, when described automatic control system is reaction, described control deviation acquisition module according to:
E＝K*(SP-PV)；
Obtain described control deviation;
When described automatic control system is positive interaction, described control deviation acquisition module according to:
E＝K*(PV-SP)；
Obtain described control deviation;
Wherein, E is described control deviation, and K is the dimension conversion coefficient of variable, and SP is described setting value, and PV is described process variable value.
10. the control system of station boiler air and flue system according to claim 8, it is characterized in that, also comprise control deviation clipping module, for carrying out amplitude limiting processing according to default low threshold parameters and default ceiling value parameter to described control deviation, after obtaining amplitude limit control deviation, upgrade described control deviation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510708518.5A CN105180138B (en) | 2015-10-26 | 2015-10-26 | The control method and system of station boiler air and flue system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510708518.5A CN105180138B (en) | 2015-10-26 | 2015-10-26 | The control method and system of station boiler air and flue system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105180138A true CN105180138A (en) | 2015-12-23 |
| CN105180138B CN105180138B (en) | 2017-08-08 |
Family
ID=54902411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510708518.5A Active CN105180138B (en) | 2015-10-26 | 2015-10-26 | The control method and system of station boiler air and flue system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105180138B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253376A (en) * | 2016-08-04 | 2016-12-21 | 广东欧珀移动通信有限公司 | A kind of PID electric current method of calibration and terminal |
| CN111459118A (en) * | 2020-05-12 | 2020-07-28 | 东方电气自动控制工程有限公司 | Closed-loop control method based on stepping superposition |
| CN111917120A (en) * | 2020-07-23 | 2020-11-10 | 天津国电津能滨海热电有限公司 | Generator set control method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235658A (en) * | 2011-04-20 | 2011-11-09 | 华能国际电力股份有限公司海门电厂 | Hearth negative pressure control method and system for coal-fired generating unit draught fan driven by small steam turbine |
| CN104296120A (en) * | 2014-10-09 | 2015-01-21 | 阳城国际发电有限责任公司 | Hearth pressure control method and hearth pressure control system |
-
2015
- 2015-10-26 CN CN201510708518.5A patent/CN105180138B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235658A (en) * | 2011-04-20 | 2011-11-09 | 华能国际电力股份有限公司海门电厂 | Hearth negative pressure control method and system for coal-fired generating unit draught fan driven by small steam turbine |
| CN104296120A (en) * | 2014-10-09 | 2015-01-21 | 阳城国际发电有限责任公司 | Hearth pressure control method and hearth pressure control system |
Non-Patent Citations (2)
| Title |
|---|
| 毕贞福等: "《火力发电厂热工自动控制实用技术》", 28 February 2008, 中国电力出版社 * |
| 潘凤萍等: "《火力发电机组自启停控制技术及应用》", 31 January 2011, 科学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253376A (en) * | 2016-08-04 | 2016-12-21 | 广东欧珀移动通信有限公司 | A kind of PID electric current method of calibration and terminal |
| CN111459118A (en) * | 2020-05-12 | 2020-07-28 | 东方电气自动控制工程有限公司 | Closed-loop control method based on stepping superposition |
| CN111917120A (en) * | 2020-07-23 | 2020-11-10 | 天津国电津能滨海热电有限公司 | Generator set control method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105180138B (en) | 2017-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105797576B (en) | Denitration ammonia injection control method for coal-fired unit | |
| CN105700570B (en) | SCR denitration control method for thermal power plant | |
| CN105180138A (en) | Control method and system for power station boiler air and flue gas system | |
| CN105180135A (en) | Unit plant coordination control method and system | |
| CN106861407B (en) | It is a kind of for avoiding the blower of paired running from tacking the control method of phenomenon | |
| US20130133594A1 (en) | Steam generation systems and methods for controlling operation of same | |
| CN111968708B (en) | SCR denitration ammonia injection amount prediction method based on random forest and LSTM neural network | |
| CN103791482A (en) | Thermal power generating unit hearth pressure segmentation control method | |
| CN107166361A (en) | Pressure fan automatic control system and method during fired power generating unit air-introduced machine failure load shedding | |
| CN106090872B (en) | A kind of overcritical coal-fired level pressure unit RB optimal control methods | |
| CN109631007A (en) | A kind of generating set boiler master system fuel feedback signal optimized treatment method | |
| CN101504135B (en) | Steam pressure equalization controller for boiler-turbine unit | |
| CN100491548C (en) | Method of controlling temperature of high-temperature ring annealing furnace | |
| CN106337966A (en) | Realization method for detection controller for valve position adjustment abnormity of industrial pulverized coal boiler | |
| CN105276561A (en) | Self-adaption predictive control method for main steam pressure of boiler | |
| CN111664460B (en) | Automatic control operation control method for sludge incineration | |
| JP5037529B2 (en) | How to operate a combustion facility | |
| CN111505940A (en) | Has future NOXFlue gas denitration control method with discharge amount prediction function | |
| CN201507945U (en) | Control, regulation and remote monitoring system for fuel/gas boilers | |
| CN106642072A (en) | Linearity correction and control method for flow characteristic of temperature-reducing water regulating valve of thermal power generating unit | |
| JP5320037B2 (en) | Boiler automatic control device and boiler system | |
| US5960624A (en) | Process for regulating gas pressures of catalyst regenerator expansion turbines | |
| US20110036279A1 (en) | NOx reduction control system for boilers | |
| CN109708104B (en) | Efficient SNCR denitration method and system for circulating fluidized bed boiler | |
| CN111765477A (en) | Secondary air control method for garbage incinerator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |