CN113339840B - Self-starting control method of thermal power generating unit wind smoke system based on autonomous object - Google Patents
Self-starting control method of thermal power generating unit wind smoke system based on autonomous object Download PDFInfo
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- CN113339840B CN113339840B CN202110673696.4A CN202110673696A CN113339840B CN 113339840 B CN113339840 B CN 113339840B CN 202110673696 A CN202110673696 A CN 202110673696A CN 113339840 B CN113339840 B CN 113339840B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/002—Regulating air supply or draught using electronic means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention discloses a thermal power generating unit wind smoke system self-starting control method based on an autonomous object. The invention adapts various starting working conditions through the adaptive object, the starting path is flexible and changeable, the operator can realize the whole-course strategic starting only by confirming and selecting the fan starting mode, and in order to ensure the safety of the unit in the starting process, the manual intervention can be interrupted at any position and at any time in the process, and the operation can be continued after the intervention. The invention cancels the single operation function of the main and auxiliary devices of the wind and smoke system in the starting process, the operators only need to set the air quantity parameter, the negative pressure index of the hearth and the target, and the related operation of the device layer is automatically completed by the program control in the object system after the process node is preset, thereby reducing the operation burden of the operators, reducing the event cost of starting the machine and greatly improving the safety in the starting process.
Description
Technical Field
The invention belongs to the field of thermal technology and intelligent control, and relates to a thermal power generating unit wind smoke system self-starting control method based on an autonomous object.
Background
In the thermal power generating unit, the wind smoke system is the important auxiliary engine system that guarantees boiler burning, and it mainly undertakes the function and has: maintaining the negative pressure of the hearth in a normal and stable range; providing a certain air quantity to ensure that the pulverized coal is fully combusted in the hearth; and (4) treating the substances which are fully combusted in the hearth and then extracting the treated substances out of the hearth. Based on the above functions, the air and smoke system generally includes a draught fan body and an oil station thereof, a blower body and an oil station thereof, an air and smoke baffle, a secondary air door and other related devices.
In the traditional air and smoke system, due to the fact that a plurality of devices are arranged, the starting of the air and smoke system comprises a large number of operations, wherein a large number of auxiliary devices such as valves and oil pumps are involved, and therefore the operation personnel are difficult to take into consideration. The wind and smoke system is used as an independent important system of a thermal power generating unit, the unit automatic start-stop control method is more and more applied to the system due to the independence and the sequence of the wind and smoke system, but the traditional automatic start-stop control method has the problems that a start route is single and fixed, an operation mode is difficult to adjust, the variable working conditions cannot be autonomous and the like. Along with the increasing of the installed capacity of the unit, the equipment maintenance is more frequent, the energy conservation and emission reduction are more and more important, and the starting mode of the air-smoke system has more choices than before, and generally comprises starting a single-side fan at the early stage of starting the unit and starting the other-side fan at the later stage of starting the unit; and starting the fans at two sides in the early stage of starting the unit and starting the fans at the side of the shutdown after the RB working condition. And the control layer also has the difficult and difficult operations of parallel investment of fans, parallel exit of fans and the like. Starting equipment is more and more diversified, starting modes are more and more diverse, and control modes after starting are more and more complex. The method greatly improves the application requirements of the unit self-starting and stopping method in the air and smoke system and the familiarity of operators to relevant equipment, relevant working conditions of the unit and relevant control means of the air and smoke system.
Disclosure of Invention
In order to solve the problems, the invention provides a self-starting control method of a thermal power generating unit smoke system based on an autonomous object, which adapts various starting working conditions through a self-adaptive object, the starting path is flexible and changeable, operators can realize the whole-course strategic starting only by confirming and selecting a fan starting mode, and in order to ensure the safety of the thermal power generating unit in the starting process, the manual intervention can be interrupted at any position and any time in the process, and the operation can be continued after the intervention.
The invention adopts the following technical scheme: a thermal power generating unit wind smoke system self-starting control method based on an autonomous object comprises the following implementation steps:
step 1), judging whether a fan is selected and the fan inspection is finished, opening an inlet contact baffle of a draught fan, and opening an outlet contact baffle of a blower;
step 2), if the fan on the side A is selected to be started, starting a function subgroup of the induced draft fan A, and if the fan on the side A is not selected to be started, executing the step 6);
step 3), judging whether the induced draft fans operate, if a single induced draft fan operates, putting the induced draft fan into automation, setting the negative pressure to be-90 to-110 Pa, and if two induced draft fans operate and meet the fan parallel condition, executing the fan parallel function;
step 4), if the side A blower is selected to be started, starting the side A blower function sub-group, otherwise, executing the step 6);
step 5), after the operation of the blower A is judged, 14-16% opening of the movable blades of the blower is set at a corresponding speed if a single blower is operated, and the next operation is skipped to execute if the two blowers are judged to be started and the opening of the movable blades of the blower B is larger than the opening of the blower (the opening of the blower is generally larger than 20%);
step 6), if the fan on the side B is selected to be started, starting the functional subgroup of the induced draft fan B, and otherwise, executing the step 10);
step 7), after judging that the induced draft fan B operates, if a single induced draft fan operates, the induced draft fan is automatically switched in, the negative pressure set value is-90 Pa to-110 Pa, and if two induced draft fans operate and meet the fan parallel condition, the fan parallel function is executed;
step 8), if the blower on the side B is selected to start, starting the blower function sub-group B, otherwise, executing step 10);
step 9), after the blower B is judged to be operated, if a single blower is operated, 14-16% of opening degree of the movable blades of the blower is set at a corresponding speed, and if the two blowers are judged to be started and the opening degree of the movable blades of the blower A is larger than the opening degree of the starting machine (the opening degree of the starting machine is generally larger than 20%), skipping to execute the next operation;
step 10), if the starting process is carried out (two sides or one side), on the basis of 14-16% opening degree of the movable blades of the air blower, the movable blades of the air blower are arranged at corresponding speed to achieve blowing air volume, and the movable blades of the air blower are put into operation automatically; if the working condition is loaded, the automatic leveling function of the air feeder is called, the movable blades are automatically put in, and the set value of the air volume is kept unchanged.
Further, in the step 2), the detailed step of starting the induced draft fan function subgroup a includes:
2.1 starting a pre-selection sealing fan of the induced draft fan A;
2.2A, putting the induced draft fan into standby in a non-working position;
2.3 if the induced draft fan B does not operate, establish side A wind cigarette passageway: the secondary air baffle is arranged at a blowing position (the blowing position is about 50% of the opening degree generally); the reheating flue gas baffle is arranged at a purging position (the purging position is about 50% of the opening degree generally); opening an inlet flue gas baffle of the air preheater A and the air preheater B; opening secondary air baffles at outlets of the air pre-heaters A and B; opening an electric baffle plate at the outlet of the air feeder A and the air feeder B; placing the opening of the movable blades of the air blower A and the air blower B at 85-95%; opening a baffle plate at the inlet of the induced draft fan B; opening an outlet baffle of the induced draft fan B; b, arranging an induced draft fan with the opening of a movable blade of 85-95%;
2.4 closing an inlet electric door of the induced draft fan A; closing the movable blade of the induced draft fan A;
2.5 opening an outlet electric door of the induced draft fan A;
2.6 starting the induced draft fan A.
Further, in step 3), the parallel function of the induced draft fans is composed of pure integral incremental PID modules, parallel loops can automatically judge induced draft fans a and B or induced draft fans B and a, undisturbed switching is performed on the moving blade instructions of the induced draft fans B or a, wherein the PID integral time is set to 60s (pure integral incremental PID, which is used for per minute change rate adjustment), the input deviation of the PID modules is automatically generated by an adaptive rate generation loop, and the principle is as follows: dividing the process of the draught fans on two sides into three stages according to the current deviation of the draught fans on two sides, wherein the current deviation is more than or equal to 20A as a first stage; the current deviation is more than or equal to 10 and less than 20A, and the second stage is carried out; the third stage is that the current deviation is less than 10A; the method comprises the steps of operating the movable blades at a reference speed of 30%/min, controlling the operation amount of the movable blades at each time according to a duration (i =1,2, 3), controlling a break time (i =1,2, 3) of operating the movable blades at each time according to the break time, and adaptively changing the break time according to the fluctuation situation of the negative pressure of the hearth.
Further, in step 4), the detailed steps of activating the blower function sub-group a include:
4.1 if the B blower is not operated, establishing a smoke channel: opening an outlet communication baffle of the air feeder; b, arranging a movable blade of a blower at 85-95% opening; opening an outlet baffle of a blower B;
4.2 fully opening the A blower movable blades;
4.3 closing an A air feeder outlet baffle;
4.4 start the A blower.
Further, in step 5), the parallel function of the blowers is composed of pure integral incremental PID modules, the parallel loop can automatically judge that the blowers are a and B or B and a, and perform undisturbed switching on the moving blade instructions of the blowers B or a, wherein the PID integral time is set to 60s (pure integral incremental PID, which is used for per minute rate of change adjustment), the input deviation of the PID module is automatically generated by the adaptive rate generating loop, and the principle is as follows: dividing the process of combining the blowers into three stages based on the current deviation of the blowers at two sides, wherein the current deviation is more than or equal to 20A as a first stage; the current deviation is more than or equal to 10 and less than 20A, and the second stage is carried out; the third stage is that the current deviation is less than 10A; the method comprises the steps of operating the movable blades at a reference speed of 30%/min, controlling the operation amount of the movable blades each time according to the duration (i =1,2, 3), controlling the discontinuous time of operating the movable blades each time according to the discontinuous time (i =1,2, 3), and adaptively changing the discontinuous time according to the deviation condition of the total air volume.
Further, in step 6), the detailed step of starting the induced draft fan function subgroup B includes:
6.1 starting a preselection sealing fan of the induced draft fan B;
6.2B, putting the induced draft fan into standby use in a non-working position of the induced draft fan;
6.3 if the induced draft fan A does not operate, establish B side wind cigarette passageway: the secondary air baffle is arranged at a blowing position (the blowing position is about 50% of the opening degree generally); the over-reheating flue gas baffle is arranged at a purging position (the purging position is about 50% of the opening degree generally); opening inlet flue gas baffles of the air pre-heaters A and B; opening secondary air baffles at outlets of the air pre-heaters A and B; opening electric baffles at the outlets of the air blowers A and B; placing the opening of the movable blades of the air blower A and the air blower B at 85-95%; opening an inlet baffle of an induced draft fan A; opening an outlet baffle of an induced draft fan A; arranging an induced draft fan with the opening of a movable blade of 85-95%;
6.4 closing an inlet electric door of the induced draft fan B; b, turning off a movable vane of the induced draft fan;
6.5 opening an outlet electric door of a draught fan B;
6.6 starting the induced draft fan B.
Further, in step 8, the detailed step of activating the blower function sub-group B includes:
8.1 if the A blower is not operated, establishing a smoke channel: opening an outlet communication baffle of the air feeder; a, arranging a movable blade of a blower at 85-95% opening; opening an outlet baffle of an A blower;
8.2 fully opening the movable blades of the B blower;
8.3 closing the outlet baffle of the B blower;
8.4 start the B blower.
Compared with the prior art, the invention has the following beneficial effects: the self-starting control of the air-smoke system facing the autonomous object can flexibly operate the air-smoke sending machine, an operator only needs to select according to requirements, clicks to start after inputting a target, a starting function group automatically completes path selection according to time optimization, energy-saving optimization, running data or manual selection, the judgment is that a single-side fan is started in the early stage of starting the machine, and the other side fan is started and the fans are automatically parallel in the later stage of starting the machine set; or the fans on the two sides are started and the fans are parallel in the early stage of starting the unit; and working conditions such as starting of the fans at the shutdown side and automatic parallel arrangement of the fans after the RB working condition. The single operation function of main and auxiliary equipment of the air and smoke system is cancelled in the starting process, operators only need to set air quantity parameters, negative pressure indexes of a hearth and targets, and after the process node is preset, the related operation of the equipment layer is automatically completed under the control of a program in an object system, so that the operation burden of the operators is reduced, the event cost of starting the machine is reduced, and the safety in the starting process is greatly improved.
Drawings
FIG. 1 is a diagram of an autonomous planned path in accordance with an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a self-start control method of a smoking system according to an embodiment of the invention;
fig. 3 is a parallel schematic view of fans in the embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the drawings of the specification and a 660MW coal-fired unit by using the autonomous object-based automatic control method of the air-smoke system of the present invention as an example.
As shown in fig. 1, the self-starting path block diagram of the autonomous object-based smoking system provided by the present invention mainly includes:
the unilateral fan is started autonomously: the starting instruction of the unilateral fan is automatically completed according to time optimization, economic optimization, operation data or manual selection, and operators do not need manual intervention, so that the whole-process intelligent control of the unilateral fan, an oil station and a valve of the unilateral fan is realized. And after the air and smoke system operates, starting the fan on the other side through the starting state of the unit, the operation data of the unit or manual selection. After the fans on the two sides are started, automatically judging parallel targets according to the current deviation value and the movable blade deviation value between the running fans, generating parallel speed loops in a self-adaptive mode, correcting parallel time according to the deviation conditions of controlled parameters such as negative pressure and total air volume of a hearth, and realizing the whole-process autonomous implementation.
The fans on the two sides are started automatically: and the fan starting instructions on the two sides are automatically completed according to time optimization, economic optimization, operation data or manual selection, target set values are adaptively embedded through equipment states, fault-tolerant selection and historical data, the fans on the two sides are started without interference in the whole process, and after the parallel conditions of the fans are met, parallel targets are adaptively judged and parallel loops are activated to realize the whole-process autonomous control.
The unilateral fan is started automatically after RB: the auxiliary machine fault rapid load Reduction (RB) is a measure taken when a main auxiliary machine of a machine set is in fault, so that the machine set can keep running under a single-side auxiliary machine without tripping. When the induced draft fan RB is sent, the state of the unit is different from the start state, the unit is loaded, the running side fan keeps the opening state of the high movable blades, and therefore the starting mode of the shutdown side fan is different from the starting mode. The intelligent control method comprises the steps that a starting instruction of a single-side fan after RB is automatically judged through unit state and running data or manual selection based on an autonomous object, the whole-process self-adaption starting of the fan after RB is achieved, and after parallel conditions of the fan are met, controlled parameters such as fan current, movable blade opening, hearth negative pressure and total air volume are used as boundary conditions to achieve whole-process self-adaption and strategy in a staged and layered mode.
As shown in fig. 1, the whole-course autonomous starting path of the wind and smoke system is not solidified, and when the set path is separated due to deviation generated by equipment or operation in the starting process, the system can adaptively adjust the autonomous object according to duration data, time optimization and manual selection so as to achieve a whole-course autonomous control strategy facing requirements, objects and systems.
As shown in fig. 2, this embodiment provides a thermal power generating unit self-starting control method based on an autonomous object, and the related detailed steps are as follows:
1) And judging whether the fan is selected and the fan inspection is finished, opening an inlet contact baffle of the induced draft fan, and opening an outlet contact baffle of the air feeder.
2) And if the side fan A is selected to start, starting the functional subgroup of the draught fan A, and otherwise, skipping to execute the operation of the step 6).
3) And after the operation of the induced draft fans is judged, if a single induced draft fan operates, the induced draft fan is automatically switched, the negative pressure is set to be-100 Pa, and if two induced draft fans operate and meet the parallel condition of the fans, the parallel function of the fans is executed.
4) If the A side blower is selected to start, starting the A blower function subgroup, otherwise, skipping to execute the step 6).
5) And after judging that the A blower operates, if a single blower operates, 15% opening degree of the blower movable blades is set at a corresponding speed, and if two blowers start and the opening degree of the blower movable blades of the B blower is larger than the starting opening degree, the next operation is executed by skipping.
6) And if the fan on the side B is selected to be started, starting the functional subgroup of the induced draft fan B, and otherwise, skipping to execute the operation of the step 10).
7) And after judging that the induced draft fans B operate, if a single induced draft fan operates, the induced draft fan is automatically switched in, the negative pressure is set to be-100 Pa, and if two induced draft fans operate and meet the fan parallel condition, the parallel function of the fans is executed.
8) If the B side blower is selected to start, starting the functional subgroup of the B blower, otherwise, skipping to execute the operation of the step 10).
9) And after judging that the blower B operates, if a single blower operates, setting 15% opening degree of the blower movable blades at a corresponding speed, and if two blowers start and the opening degree of the blower movable blades of the blower A is larger than the starting opening degree, skipping to execute the next operation.
10 If the starting process is (two-sided or single-sided), on the basis of 15% of the movable blades of the blower, the movable blades of the blower are arranged at corresponding speed to achieve the blowing air volume, and the movable blades of the blower are put into operation automatically; if the working condition is loaded, the automatic leveling function of the air feeder is called, the movable blades are automatically thrown in, and the set value of the air volume is kept unchanged.
As shown in fig. 3, this embodiment further provides an automatic parallel means for the induced draft fans, taking the induced draft fans as an example, the specific method is as follows:
in the automatic leveling function of the induced draft fan, an operator starts a function group through a wind and smoke system to call, in addition, for flexible management, an automatic leveling button of the induced draft fan is further arranged, the automatic leveling button of the induced draft fan is switched on by the operator to realize the functions of the induced draft fan, an automatic parallel control loop can automatically judge whether an induced draft fan A and an induced draft fan B or an induced draft fan B and an induced draft fan A according to unit operation data and then operate movable blades of the induced draft fan A and the induced draft fan B according to unit operation data, the operator can intervene at any time according to the unit output condition and the unit state when the induced draft fans on two sides are leveled, the induced draft fan quit and operate the movable blades of the induced draft fan automatically through quitting and the function button of the induced draft fan, the function button of the induced draft fan is switched on again after the normal state is recovered, and the fan process is continuously executed at the current state.
Judging that A draught fan and B draught fan then generate A and B sign and A draught fan parallel instruction by the automatic parallel control circuit that pure integral incremental PID module is constituteed, do not have the disturbance to A draught fan movable vane instruction and switch over, if judge that B draught fan and A draught fan then generate B and A sign and B draught fan parallel instruction, do not have the disturbance to B draught fan movable vane instruction and switch over, wherein PID integration time sets up 60s, PID's input deviation is produced the return circuit by adaptive rate and is automatic generation, the principle is as follows: the fan current completion signal is based on current balance at two sides, namely the fan merging process is divided into three stages based on current deviation of draught fans at two sides, and the first stage is that the current deviation is more than or equal to 20A; the current deviation is more than or equal to 10 and less than 20A, and the second stage is carried out; the third stage is current deviation < 10A. Bucket operation at a reference rate of 30%/min, according to duration t i1 (i =1,2, 3) controlling the operation amount to the bucket at each time according to the intermittent time t i2 (i =1,2, 3) controlling the break time of operating the movable blade at each time, and adaptively changing the break time according to the fluctuation condition of the negative pressure of the hearth, wherein the break time and the duration time are adaptively changed along with different stages. In the first stage, the time is 10s and 20s, namely, the operation is performed on the movable blade for 5% every time, and the interruption is performed for 20s until the current deviation is less than 20A; in the second stage, the time is 5s and 30s, namely 2.5 percent of operation is carried out on the movable blade each time, and the operation is interrupted for 30s until the current is biasedThe difference is less than 10A; and in the third stage, the time is 1s and 40s, namely, the movable blades are operated for 0.5 percent each time, the operation is interrupted for 40s until the current deviation is less than 2A, when the current deviation of the induced draft fans on the two sides is less than 2A, the induced draft fan movable blades are automatically thrown into the induced draft fan A, and the fan process is completed. The parallel control method of the air blowers is like that of the induced draft fans.
The embodiments described herein are intended to explain only a few embodiments of the invention rather than all embodiments, and other embodiments within the scope of the invention will be apparent to those skilled in the art without the benefit of the teachings herein.
Claims (6)
1. A thermal power generating unit wind smoke system self-starting control method based on an autonomous object is characterized by comprising the following steps:
step 1), judging whether a fan is selected and the fan inspection is finished, opening an inlet contact baffle of the induced draft fan, and opening an outlet contact baffle of the air feeder;
step 2), if the side A fan is selected to be started, starting a function subgroup of the induced draft fan A, and otherwise, executing the step 6);
step 3), after the induced draft fan A is judged to operate, if a single induced draft fan operates, the induced draft fan is automatically switched in, the negative pressure set value is-90 Pa to-110 Pa, and if two induced draft fans operate and meet the fan parallel condition, the fan parallel function is executed;
step 4), if the blower on the side A is selected to be started, starting the blower function sub-group A, and if not, executing the step 6);
step 5), after the operation of the blower A is judged, 14-16% opening of the movable blades of the blower is set at a corresponding speed if a single blower is operated, and the next operation is skipped to be executed if the two blowers are judged to be started and the opening of the movable blades of the blower B is larger than the opening of the blower;
step 6), if the fan on the side B is selected to be started, starting the functional subgroup of the induced draft fan B, and otherwise, executing the step 10);
step 7), after judging that the induced draft fan B operates, if a single induced draft fan operates, the induced draft fan is put into operation automatically, the negative pressure is set to be-90 to-110 Pa, and if two induced draft fans operate and meet the fan parallel condition, the fan parallel function is executed;
step 8), if the B side blower is selected to be started, starting the B blower function sub-set, otherwise, executing the step 10);
step 9), after the blower B is judged to be operated, 14-16% opening of the movable blades of the blower is set at a corresponding speed if a single blower is operated, and the next operation is skipped to be executed if the two blowers are judged to be started and the opening of the movable blades of the blower A is larger than the opening of the blower;
step 10), if the starting process is carried out, on the basis of 14-16% opening of the movable blades of the blower, the movable blades of the blower are arranged at a corresponding speed to achieve blowing air volume, and the movable blades of the blower are put into operation automatically; if the working condition is loaded, the automatic leveling function of the air feeder is called, the movable blades are automatically put in, and the set value of the air volume is kept unchanged;
in step 3), the parallel function of the induced draft fans is composed of a pure integral incremental PID module, a parallel loop can automatically judge whether induced draft fans A and B or induced draft fans B and A are combined, undisturbed switching is carried out on movable vane instructions of the induced draft fans B or A, the PID integral time is set to 60s, the input deviation of the PID module is automatically generated by a self-adaptive rate generation loop, and the principle is as follows: dividing the process of merging the induced draft fans into three stages according to the current deviation of the induced draft fans on the two sides, wherein the current deviation is more than or equal to 20A and is taken as a first stage; the current deviation is more than or equal to 10 and less than 20A, and the second stage is carried out; the third stage is that the current deviation is less than 10A; the method comprises the steps of carrying out movable blade operation at a reference speed of 30%/min, controlling the operation amount of the movable blade every time according to the duration, controlling the interruption time of operating the movable blade every time according to the interruption time, and changing the interruption time in a self-adaptive mode according to the fluctuation condition of the negative pressure of the hearth.
2. The self-starting control method for the thermal power generating unit smoke system based on the autonomous object according to claim 1, wherein in the step 2), the detailed step of starting the induced draft fan function sub-group A comprises the following steps:
2.1 starting a preselection sealing fan of the induced draft fan A;
2.2A, putting the induced draft fan into standby in a non-working position;
2.3 if the induced draft fan B does not operate, establish side A wind cigarette passageway: the secondary air baffle is arranged at a blowing position; the overheating flue gas baffle is arranged at a blowing position; opening an inlet flue gas baffle of the air preheater A and the air preheater B; opening secondary air baffles at outlets of the air pre-heaters A and B; opening an electric baffle plate at the outlet of the air feeder A and the air feeder B; placing the opening of the movable blades of the air blower A and the air blower B at 85-95%; opening a baffle plate at the inlet of the induced draft fan B; opening an outlet baffle of a draught fan B; b, arranging an induced draft fan with the opening of a movable blade of 85-95%;
2.4 closing an inlet electric door of the induced draft fan A; closing the movable blade of the induced draft fan A;
2.5 opening an outlet electric door of the induced draft fan A;
2.6 starting the induced draft fan A.
3. The self-starting control method for the thermal power generating unit smoke system based on the autonomous object as claimed in claim 1, wherein in the step 4), the detailed step of starting the A blower function sub-group comprises the following steps:
4.1 if the blower B is not operated, establishing a smoke channel: opening an outlet communication baffle of the air feeder; b, arranging a movable blade of a blower at 85-95% opening; opening an outlet baffle of a blower B;
4.2 fully opening the A blower movable blades;
4.3 closing an A air feeder outlet baffle;
4.4 starting the A blower.
4. The self-starting control method of the thermal power generating unit smoke system based on the autonomous object as claimed in claim 1, wherein in step 5), the parallel function of the blowers is composed of a pure integral incremental PID module, a parallel loop can automatically judge blower A and blower B or blower B and blower A, and undisturbed switching is performed on the moving blade instruction of the blower B or blower A, wherein the PID integral time is set to 60s, and the input deviation of the PID module is automatically generated by an adaptive rate generation loop, and the principle is as follows: dividing the process of combining the blowers into three stages based on the current deviation of the blowers at two sides, wherein the current deviation is more than or equal to 20A as a first stage; the current deviation is more than or equal to 10 and less than 20A, and the second stage is carried out; the third stage is that the current deviation is less than 10A; the method comprises the steps of carrying out movable blade operation at a reference speed of 30%/min, controlling the operation amount of the movable blade every time according to the duration, controlling the discontinuous time for operating the movable blade every time according to the discontinuous time, and changing the discontinuous time in a self-adaptive mode according to the deviation condition of the total air volume.
5. The self-starting control method for the thermal power generating unit smoke system based on the autonomous object according to claim 1, wherein in step 6), the detailed step of starting the induced draft fan function subgroup B comprises the following steps:
6.1 starting a preselection sealing fan of the induced draft fan B;
6.2B, putting the induced draft fan into standby use in a non-working position of the induced draft fan;
6.3 if the induced draft fan A does not operate, establishing a side B air flue channel: the secondary air baffle is arranged at a blowing position; the overheating flue gas baffle is arranged at a blowing position; opening an inlet flue gas baffle of the air preheater A and the air preheater B; opening secondary air baffles at outlets of the air pre-heaters A and B; opening electric baffles at the outlets of the air blowers A and B; placing the opening of the movable blades of the air blower A and the air blower B at 85-95%; opening an inlet baffle of an induced draft fan A; opening an outlet baffle of an induced draft fan A; arranging an induced draft fan with the opening of a movable blade of 85-95%;
6.4 closing an inlet electric door of the induced draft fan B; b, turning off a movable blade of an induced draft fan;
6.5 opening an outlet electric door of the induced draft fan B;
6.6 starting the induced draft fan B.
6. The self-starting control method for the thermal power generating unit smoke system based on the autonomous object as claimed in claim 1, wherein in the step 8, the detailed step of starting the B blower function sub-group comprises the following steps:
8.1 if the A blower is not operated, establishing a smoke channel: opening an outlet communication baffle of the air feeder; a, arranging a movable blade of a blower at 85-95% opening; opening an outlet baffle of an A blower;
8.2 full-open B blower blade;
8.3 closing an outlet baffle of the B blower;
8.4 start the B blower.
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