CN114172419A - Automatic power generation control method and device for generator set - Google Patents
Automatic power generation control method and device for generator set Download PDFInfo
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- CN114172419A CN114172419A CN202111389442.6A CN202111389442A CN114172419A CN 114172419 A CN114172419 A CN 114172419A CN 202111389442 A CN202111389442 A CN 202111389442A CN 114172419 A CN114172419 A CN 114172419A
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- 238000010248 power generation Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000003245 coal Substances 0.000 claims abstract description 192
- 238000002485 combustion reaction Methods 0.000 claims abstract description 69
- 238000010298 pulverizing process Methods 0.000 claims abstract description 50
- 230000008859 change Effects 0.000 claims abstract description 49
- 239000002817 coal dust Substances 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 28
- 238000007664 blowing Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000004044 response Effects 0.000 abstract description 20
- 230000001276 controlling effect Effects 0.000 description 12
- 230000008569 process Effects 0.000 description 12
- 238000004590 computer program Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 238000010304 firing Methods 0.000 description 7
- 238000003860 storage Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000002411 adverse Effects 0.000 description 4
- 238000000227 grinding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000012432 intermediate storage Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
- F23N1/02—Regulating fuel supply conjointly with air supply
- F23N1/025—Regulating fuel supply conjointly with air supply using electrical or electromechanical means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/04—Control effected upon non-electric prime mover and dependent upon electric output value of the generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/25—Special adaptation of control arrangements for generators for combustion engines
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Abstract
The invention discloses a method and a device for controlling the automatic power generation of a generator set, and the method for controlling the automatic power generation of the generator set is characterized by comprising the following steps: under the condition of receiving the change of the generating load instruction of the unit, outputting a variable, wherein the variable is used for controlling the variable quantity of the air quantity of the pulverizing system; and sending the variable to a coal mill so that the coal mill controls the amount of coal dust entering the combustion chamber according to the variable. The technical scheme can solve the problems of low response rate and insufficient load change amplitude of the existing coal-fired power generation unit to AGC and primary frequency modulation performance in the prior art.
Description
Technical Field
The invention relates to the field of automation, in particular to an automatic power generation control method and device for a generator set.
Background
The automatic power generation control (AGC) and primary frequency modulation performance of the coal-fired generator set are a cascade system consisting of boiler load response characteristics, steam turbine load response characteristics and excitation system load response characteristics, the main factor determining the automatic power generation control response performance is the boiler load response characteristics, and the cascade system mainly consists of four links of response characteristics of a combustion rate to a boiler instruction, response characteristics of a boiler heat load to a combustion rate, response characteristics of a steam heat load to a boiler heat load and response characteristics of unit power generation power to steam quantity.
In the four links of the boiler load response characteristic, the combustion rate has higher adjustability on the response characteristic of a boiler instruction, and the function of the boiler load response characteristic is realized by the charge of a boiler pulverizing system. The high-capacity and high-efficiency coal-fired generating set is generally provided with two types of pulverizing systems, namely a positive pressure direct-blowing type pulverizing system and an intermediate storage type pulverizing system, and the intermediate storage type pulverizing system is rarely adopted for a supercritical or ultra-supercritical unit. However, when the direct-blowing pulverizing system operates in the AGC mode or the primary frequency modulation command acts, a large delay exists due to delay and inertia between increase of the boiler combustion rate and the power generation load demand of the unit, but the control system thereof designs an adjustment link for limiting change in order to keep energy balance in the unit operation from fluctuating violently, so that the AGC and primary frequency modulation performance response rate is low and the load change amplitude is insufficient.
Disclosure of Invention
The embodiment of the invention provides a method and a device for controlling automatic power generation of a generator set, which aim to solve the problems of low response rate of the existing coal-fired generator set to AGC (automatic gain control) and primary frequency modulation performance and insufficient load change amplitude in the prior art.
In order to solve the technical problem, the invention is realized as follows:
in a first aspect, an automatic power generation control method for a generator set is provided, which includes:
under the condition of receiving the change of the generating load instruction of the unit, outputting a variable, wherein the variable is used for controlling the variable quantity of the air quantity of the pulverizing system;
and sending the variable to a coal mill so that the coal mill controls the amount of coal dust entering the combustion chamber according to the variable.
In a second aspect, an automatic power generation control device for a generator set is provided, which is characterized by comprising:
the output module is used for outputting a variable under the condition of receiving the change of the generating load instruction of the unit, wherein the variable is used for controlling the variable quantity of the air quantity of the pulverizing system;
and the control module is used for sending the variable to the coal mill so that the coal mill can control the amount of the pulverized coal entering the combustion chamber according to the variable.
In a third aspect, an electronic device is provided, comprising a processor, a memory and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the method according to the first aspect.
In a fourth aspect, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, when being executed by a processor, realizes the steps of the method according to the first aspect.
The embodiment of the application discloses an automatic power generation control method of a generator set, which can pre-adjust the working states of a powder making system and a coal mill before the parameters of the powder making system and the coal mill are changed according to the feedback adjustment of each component in the generator set under the condition of receiving the change of a power generation load instruction of the generator set by superposing a pulse step opening disturbance on a primary wind shield of the powder making system and the coal mill, and control the variation of the air quantity of the powder making system by utilizing the variable corresponding to the change of the power generation load instruction of the generator set, so that the coal mill can control the quantity of pulverized coal sent into a combustion chamber by the coal mill based on the variation, pre-change the combustion condition of the combustion chamber, increase or reduce the power generation power of the generator set, and further before the time point of the generator set for normally adjusting the powder making system and the coal mill based on the change of the power generation load instruction, the working state of the coal mill is adjusted in advance, and the influence degree of the combustion rate of the combustion chamber on the delay and inertia of the load requirement of the generator set is reduced, so that the response rate of AGC (automatic gain control) and primary frequency modulation performance of the generator set is improved, and the stability of the generated charge of the generator set is higher.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a flowchart of an automatic power generation control method for a generator set according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an automatic power generation control device of a generator set according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following describes in detail the method and apparatus for controlling automatic power generation of a generator set according to the embodiments of the present application with reference to the accompanying drawings.
As shown in fig. 1, which is a flowchart of an automatic power generation control method for a generator set according to an embodiment of the present invention, as shown in fig. 1, the automatic power generation control method for a generator set may include contents shown in S101 and S102.
In S101, when a change in the power generation load command of the unit is received, a variable for controlling the amount of change in the airflow of the pulverizing system is output.
In the power generation process, the power generation frequency needs to be kept stable, the power generation frequency is influenced by the power generation power and the power load, the power generation power is dynamically adjusted based on the power load, and when the power load changes, the generator set needs to be correspondingly adjusted according to the specific change condition of the power load and sends a power generation load instruction to change. Further, when a change in the unit power generation load command is received, it is described that the generated power needs to be adjusted. In this way, in the embodiment of the present application, a variable capable of controlling the amount of change in the airflow of the pulverizing system is output based on the change in the power generation load command. Specifically, the variable may be generated by inputting the power generation load command into a function generator, and the amount of change in the air flow of the pulverizing system may be controlled by using the specific magnitude and direction of the variable, where the amount of change in the air flow includes the case where the pulverizing system increases or decreases the air flow, and the magnitude of the value of the amount of change in the air flow.
In detail, in S102, the above variables are transmitted to the coal mill so that the coal mill controls the amount of pulverized coal entering the combustion chamber according to the variables. As described above, the variable can control the change of the air flow of the pulverizing system, that is, the variable amount, and when the air flow of the pulverizing system changes, the amount of pulverized coal fed into the combustion furnace by the coal mill can be adaptively changed, and the power generation capacity of the power generator set can be changed.
In the process of the technical scheme, a pulse step opening disturbance can be superposed on a primary windshield plate of the coal pulverizing system and the coal mill, under the action of the step opening disturbance, under the condition that the generator set receives the change of the power generation load instruction, and after feedback adjustment of each device in the generator set, the working state of the coal mill is adjusted in advance before the coal pulverizing system and the coal mill are controlled to adaptively change the amount of the coal dust fed into the combustion chamber based on the power generation load instruction, so that the air volume change of the coal pulverizing system can be changed in advance at a certain time point (the length of the coal pulverizing system is according to the set time of the pulse) before the time point of normal adjustment, and then the primary air volume of the coal mill is increased or reduced instantly, the amount of the pulverized coal entering the combustion chamber is adjusted rapidly, and after the inertial delay of the set time (namely the duration represented by the pulse), the adjustment of the primary air volume is automatically recovered to the output value of the control instruction of the generator. The pulse step opening disturbance is open-loop adjustment, and the set change of any parameter on the generator set is not influenced, so that the opening disturbance is prevented from generating adverse influence on the combustion command change of the combustion chamber.
By adopting the technical scheme, when the generator set sends an AGC control mode or a primary frequency modulation instruction, the primary air quantity of the pulverizing system corresponding to the coal mill can be directly changed, and the quantity of the fuel sent into the combustion chamber can be quickly changed. Besides, the functions are arranged in a primary air volume adjusting link of the coal mill, and do not participate in setting and correcting other parameters in the generator set.
The embodiment of the application discloses an automatic power generation control method of a generator set, which can pre-adjust the working states of a powder making system and a coal mill before the parameters of the powder making system and the coal mill are changed according to the feedback adjustment of each component in the generator set under the condition of receiving the change of a power generation load instruction of the generator set by superposing a pulse step opening disturbance on a primary wind shield of the powder making system and the coal mill, and control the variation of the air quantity of the powder making system by utilizing the variable corresponding to the change of the power generation load instruction of the generator set, so that the coal mill can control the quantity of pulverized coal sent into a combustion chamber by the coal mill based on the variation, pre-change the combustion condition of the combustion chamber, increase or reduce the power generation power of the generator set, and further before the time point of the generator set for normally adjusting the powder making system and the coal mill based on the change of the power generation load instruction, the working state of the coal mill is adjusted in advance, and the influence degree of the combustion rate of the combustion chamber on the delay and inertia of the load requirement of the generator set is reduced, so that the response rate of AGC (automatic gain control) and primary frequency modulation performance of the generator set is improved, and the stability of the power generation load of the generator set is higher.
In the technical scheme, the power generation load instruction of the generator set can be judged, specifically, the judgment can be carried out through the control mode, if the generator set is in the automatic coordination control mode of the operator, the power generation load instruction of the generator set is set by the operator, and under the condition, the adjustment link of the pulverizing system is not started, so that the interference on the process of adjusting the parameters of the generator set by the operator is avoided.
Correspondingly, under the condition that the generator set has the AGC adjusting condition, namely the generator set is in an automatic power generation control mode at present, whether the load factor of the coal pulverizing system is in the optimal buffering capacity range of the coal mill or not can be determined, and specifically, the rated output of the coal mill can be positioned between 70% and 90% of the maximum output of the coal mill, so that coal blockage of the coal mill or great change of the coal powder concentration caused by adjustment of the primary air quantity of the coal mill can be prevented, and further, adverse effects on normal operation of the coal mill can be generated.
Correspondingly, if the result of the judging process is that the output of the coal mill may exceed 90% of the rated output, a regulating function for locking the reduction of the primary air volume can be set, so that the abnormal event of coal blockage of the coal mill caused by too large fluctuation of the primary air volume is prevented, and the working reliability of the generator set is improved.
Further, in S102, the method specifically includes the following steps:
under the condition that the power generation load instruction of the unit is increased, outputting a first variable; outputting the first variable to a primary air quantity adjusting plate baffle actuator of the coal mill so as to increase the quantity of the coal dust entering a combustion chamber;
under the condition that the power generation load instruction of the unit is reduced, outputting a second variable; and sending the second variable to a baffle actuator of a primary air volume adjusting plate of the coal mill so as to reduce the coal powder entering the combustion chamber.
Specifically, the direction of the power generation load command includes an increase and a decrease, and in the case that the power load is greater than the power generation power, the power generation load is an increase command; correspondingly, when the electrical load is smaller than the generated power, the generated load is the reduction command.
Under the condition, when the power generation load instruction of the unit is increased, the power generation power needs to be increased, and then a first variable is output, and under the action of the first variable, the corresponding opening degree of a baffle actuator of a primary air quantity adjusting plate of the coal mill can be adjusted to increase the quantity of the coal powder entering the combustion. Specifically, the output of the coal mill can be increased by increasing the air volume of the coal pulverizing system so as to increase the coal grinding amount of the coal mill; or partial coal powder stored in the coal mill can be fed into the combustion chamber, so that the amount of the coal powder fed into the combustion chamber can be increased, and the purpose of increasing the power generation power of the generator set is achieved.
Correspondingly, when the power generation load instruction of the unit is reduced, the power generation power needs to be reduced, and then a second variable is output, and under the action of the second variable, the corresponding opening degree can be executed by adjusting a primary air quantity adjusting plate baffle actuator of the coal mill so as to reduce the quantity of the pulverized coal entering the combustion. Specifically, the output of the coal mill can be reduced by reducing the air volume of the pulverizing system so as to reduce the coal grinding amount of the coal mill; or the pulverized coal ground by the coal grinding machine can be used as buffer storage, so that the amount of the pulverized coal fed into the combustion chamber can be reduced, and the purpose of reducing the generating power of the generator set is achieved.
Optionally, in the control method disclosed in the embodiment of the present application, after receiving a change of the unit power generation load instruction, the control method further includes:
and setting control instructions in different sequences according to the positions of the burners corresponding to the pulverizing system.
That is to say, when adjusting the operating condition of powder process system and coal pulverizer, under the different circumstances of the concrete structure of the combustor that the powder process system corresponds, can set up different control sequence to make the response efficiency of instruction higher, promote the ability of generating set power of stabilizing.
Based on the above embodiment, further, the step of setting different sequences of control commands according to the burner position corresponding to the pulverizing system may specifically include:
and under the condition that the burners are arranged in a tangential firing mode, setting the sequence of the pulverizing systems corresponding to the burners on the second layer, the third layer and the fourth layer in sequence. That is, in the case where the burners corresponding to the pulverizing systems are arranged in the tangential firing manner, the order of the manner in which the burners corresponding to the third and fourth layers are fired in sequence with the second layer as the starting position may be controlled, so that both the combustion stability and the combustion economy of the burners arranged in the tangential firing manner are relatively high.
And under the condition that the burners are arranged in a hedging mode, setting the sequence of the pulverizing systems corresponding to the burners on the front wall of the middle layer, the rear wall of the middle layer and the front wall of the upper layer in sequence. That is, in the case where the burners corresponding to the pulverizing system are arranged in the opposed firing manner, the order of the manner in which the intermediate layer front wall is used as the starting position and the pulverizing systems corresponding to the intermediate layer rear wall and the upper layer front wall burners are fired in sequence may be controlled, so that both the combustion stability and the combustion economy of the burners arranged in the opposed firing manner are relatively high.
In the above embodiment, the number of the coal mills may be one, and in this embodiment, the number of the coal mills may be multiple, so that on one hand, the response rate of the generator set may be improved, and on the other hand, the reliability of the generator set may also be improved.
Based on the above, the plurality of coal mills may include a first coal mill and a second coal mill, and optionally, the S102 may include:
and after the primary air volume of the first coal mill is adjusted and the preset delay pulse is carried out, controlling the primary air volume of the second coal mill. That is, in the case where the number of coal mills is plural, different coal mills are controlled to operate in sequence, and a preset time interval is set between the starting time points of the coal mills that are started adjacent in time. Of course, when the plurality of coal mills includes the third coal mill, the third coal mill may control the primary air volume of the third coal mill after the primary air volume of the second coal mill is adjusted and the preset delay pulse is passed.
Under the condition of adopting above-mentioned technical scheme, can prevent that the sudden change of once amount of wind from causing the change of buggy fineness, and then produces adverse effect to the combustion conditions in the combustion chamber. More specifically, the number of coal mills in operation and the size of the preset delay pulses between the coal mills can be adaptively configured according to the AGC settling performance of the job site.
As mentioned above, the number of the coal mills may be multiple, and in this embodiment, optionally, the step S102 may also include:
the primary air volume of a plurality of coal mills is controlled to be adjusted simultaneously. That is to say, in this embodiment, under the condition that the generated power needs the parameter to adjust simultaneously of a plurality of coal mills, can adjust the amount of wind of many coal mills simultaneously, and then can change the combustion rate of combustion chamber more fast effectively, reach the purpose of quick adjustment combustion chamber heat load to promote the ability that power generation system maintains the generated power stability.
As mentioned above, the number of the coal mills may be multiple, in this embodiment, there are optionally multiple kinds of the multiple coal mills, in this case, the step S102 may include:
and under the condition that the coal mill is a normal-pressure direct-blowing medium-speed coal mill, adjusting the opening degree of the hot primary air baffle according to the variable. That is, when the positive pressure direct-fired medium speed coal mill is adopted, the opening degree of the hot primary air baffle of the coal mill is adjusted based on the variation of the air quantity of the pulverizing system, so that the corresponding amount of pulverized coal in the coal mill can be blown out and sent into the combustion chamber to participate in combustion, and the generated power of the generator set is further changed in advance.
And under the condition that the coal mill is a positive pressure direct blowing type steel ball coal mill, adjusting the opening degree of the hot primary air baffle and the opening degree of an outlet rotary graduator of the coal mill according to the variable. That is, when the positive pressure direct-fired steel ball coal mill is adopted, the opening degree of the hot primary air baffle of the coal mill can be adjusted based on the variable quantity of the air quantity of the pulverizing system, and the opening degree of the coal mill outlet rotary separator is correspondingly adjusted, so that the opening degree of the coal mill outlet rotary separator and the opening degree of the hot primary air baffle are mutually matched. Under the condition, the coal powder with the corresponding amount in the coal mill can be blown out and sent to the combustion chamber to participate in combustion, so that the power generation power of the generator set is changed in advance.
More specifically, when the coal mill is a positive pressure direct-blowing steel ball coal mill, the opening degree of the rotary separator of the coal mill can be synchronously adjusted when the primary air volume corresponding to the coal mill is adjusted. In detail, when the hot primary air baffle is opened, the rotating speed of the outlet rotating separator of the coal mill can be correspondingly increased, and when the opening degree of the hot primary air baffle is gradually restored, the rotating speed of the outlet rotating separator of the coal mill is also restored to the original set value, so that the working performance of the coal mill is improved.
In the power generation control method disclosed in any of the above embodiments, the type of the combustion chamber of the boiler, etc., and the type of the pulverizing system may be adaptively changed. The boiler with single-hearth tangential firing can set primary air adjusting function in the pulverizing system corresponding to the middle three-layer or middle four-layer burners according to the arrangement mode of the burners. The opposed combustion single-hearth boiler is configured, and a primary air adjusting function can be arranged on the pulverizing systems corresponding to the two groups of burners on the front wall and the rear wall of the middle layer. For a dual hearth boiler, reference may be made to a opposed firing boiler arrangement.
Based on the method for controlling the automatic power generation of the generator set disclosed in any of the above embodiments, as shown in fig. 2, the embodiment of the present application further discloses a device for controlling the automatic power generation of the generator set, which includes:
the output module 201 is configured to output a variable when a change of a power generation load instruction of a unit is received, where the variable is used to control a variation of an air volume of a pulverizing system;
the control module 202 sends the variable to the coal mill to cause the coal mill to control the amount of coal fines entering the combustion chamber based on the variable.
In the process of the technical scheme, a pulse step opening disturbance can be superposed on a primary windshield plate of the coal pulverizing system and the coal mill, under the action of the step opening disturbance, under the condition that the generator set receives the change of the power generation load instruction, and after feedback adjustment of each device in the generator set, the working state of the coal mill is adjusted in advance before the coal pulverizing system and the coal mill are controlled to adaptively change the amount of the coal dust fed into the combustion chamber based on the power generation load instruction, so that the air volume change of the coal pulverizing system can be changed in advance at a certain time point (the length of the coal pulverizing system is according to the set time of the pulse) before the time point of normal adjustment, and then the primary air volume of the coal mill is increased or reduced instantly, the amount of the pulverized coal entering the combustion chamber is adjusted rapidly, and after the inertial delay of the set time (namely the duration represented by the pulse), the adjustment of the primary air volume is automatically recovered to the output value of the control instruction of the generator. The pulse step opening disturbance is open-loop adjustment, and the set change of any parameter on the generator set is not influenced, so that the opening disturbance is prevented from generating adverse influence on the combustion command change of the combustion chamber.
By adopting the technical scheme, when the generator set sends an AGC control mode or a primary frequency modulation instruction, the primary air quantity of the pulverizing system corresponding to the coal mill can be directly changed, and the quantity of the fuel sent into the combustion chamber can be quickly changed. Besides, the functions are arranged in a primary air volume adjusting link of the coal mill, and do not participate in setting and correcting other parameters in the generator set.
The embodiment of the application discloses an automatic power generation control method of a generator set, which can pre-adjust the working states of a powder making system and a coal mill before the parameters of the powder making system and the coal mill are changed according to the feedback adjustment of each component in the generator set under the condition of receiving the change of a power generation load instruction of the generator set by superposing a pulse step opening disturbance on a primary wind shield of the powder making system and the coal mill, and control the variation of the air quantity of the powder making system by utilizing a variable corresponding to the change of the power generation load instruction of the generator set, so that the coal mill can control the quantity of pulverized coal sent into a combustion chamber by the coal mill based on the variable, pre-change the combustion condition of the combustion chamber, increase or reduce the power generation power of the generator set, and further before the time point of the generator set for normally adjusting the powder making system and the coal mill based on the change of the power generation load instruction, the working state of the coal mill is adjusted in advance, and the influence degree of the combustion rate of the combustion chamber on the delay and inertia of the load requirement of the generator set is reduced, so that the response rate of AGC (automatic gain control) and primary frequency modulation performance of the generator set is improved, and the stability of the generated charge of the generator set is higher.
Further, the control module 202 is further configured to:
under the condition that the power generation load instruction of the unit is increased, outputting a first variable;
outputting the first variable to a primary air quantity adjusting plate baffle actuator of the coal mill so as to increase the quantity of the coal dust entering a combustion chamber;
under the condition that the power generation load instruction of the unit is reduced, outputting a second variable;
and sending the second variable to a baffle actuator of a primary air volume adjusting plate of the coal mill so as to reduce the coal powder entering the combustion chamber.
Further, the number of coal mills may be multiple, the multiple coal mills may include a first coal mill and a second coal mill, and the control module 202 is configured to:
and after the primary air volume of the first coal mill is adjusted and the preset delay pulse is carried out, controlling the primary air volume of the second coal mill.
In the case where the number of coal mills is multiple, the control module 202 is configured to:
and controlling the primary air volume of the coal mills to be adjusted simultaneously.
In the case where the number of coal mills is plural and the types of the plural coal mills include plural, the control module is configured to:
under the condition that the coal mill is a normal-pressure direct-blowing medium-speed coal mill, adjusting the opening degree of the hot primary air baffle according to a variable;
and under the condition that the coal mill is a positive-pressure direct-blowing steel ball coal mill, adjusting the opening degree of the hot primary air baffle and the opening degree of an outlet rotary graduator of the coal mill according to variables.
Optionally, the automatic power generation control device for a generator set disclosed in the embodiment of the present application may further include:
and the setting module is used for setting control instructions in different sequences according to the position of the burner corresponding to the powder making system.
Further, the setting module is further configured to:
setting the sequence of the pulverizing systems corresponding to the burners of the second layer, the third layer and the fourth layer in sequence under the condition that the burners are arranged in a tangential circle;
and under the condition that the burners are arranged in a hedging mode, setting the sequence of the pulverizing systems corresponding to the burners on the front wall of the middle layer, the rear wall of the middle layer and the front wall of the upper layer in sequence.
The automatic power generation control device for a generator set provided in this embodiment may refer to a flowchart for executing the method shown in fig. 1, and each unit/module and the other operations and/or functions in the device are respectively for implementing a corresponding flowchart in the automatic power generation control method for a generator set shown in fig. 1, and may achieve the same or equivalent technical effects, and for brevity, no further description is provided herein.
Preferably, an embodiment of the present invention further provides an electronic device, which includes a processor, a memory, and a computer program stored in the memory and capable of running on the processor, where the computer program, when executed by the processor, implements each process of the above-mentioned method for controlling automatic power generation of a generator set, and can achieve the same technical effect, and details are not repeated here to avoid repetition.
The embodiment of the invention also provides a computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and when being executed by a processor, the computer program realizes each process of the above-mentioned automatic power generation control method for a generator set, and can achieve the same technical effect, and in order to avoid repetition, the details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. An automatic power generation control method for a generator set is characterized by comprising the following steps:
under the condition of receiving the change of the generating load instruction of the unit, outputting a variable, wherein the variable is used for controlling the variable quantity of the air quantity of the pulverizing system;
and sending the variable to a coal mill so that the coal mill controls the amount of coal dust entering the combustion chamber according to the variable.
2. The method of claim 1, wherein sending the variable to a coal pulverizer to cause the coal pulverizer to control an amount of coal fines entering a combustion chamber based on the variable comprises:
under the condition that the unit power generation load instruction is increased, outputting a first variable;
outputting the first variable to a primary air volume adjusting plate baffle actuator of the coal mill so as to increase the amount of coal dust entering the combustion chamber;
under the condition that the unit power generation load instruction is reduced, outputting a second variable;
and sending the second variable to a baffle actuator of a primary air volume adjusting plate of the coal mill so as to reduce the coal powder entering the combustion chamber.
3. The method of claim 1, wherein after receiving a change in a unit power generation load command, the method further comprises:
and setting control instructions in different sequences according to the positions of the burners corresponding to the pulverizing system.
4. The method of claim 3, wherein setting different sequences of control commands according to the burner positions corresponding to the pulverizing system comprises:
setting the sequence of the pulverizing systems corresponding to the burners of the second layer, the third layer and the fourth layer in sequence under the condition that the burners are arranged in a tangential circle mode;
and under the condition that the burners are arranged in a hedging mode, setting the sequence of the pulverizing systems corresponding to the burners on the front wall of the middle layer, the rear wall of the middle layer and the front wall of the upper layer in sequence.
5. The method of claim 1, wherein the coal pulverizer is plural in number; the sending the variable to a coal mill to enable the coal mill to control the amount of pulverized coal entering a combustion chamber according to the variable comprises:
and after the primary air volume of the first coal mill is adjusted and the preset delay pulse is carried out, controlling the primary air volume of the second coal mill.
6. The method of claim 1, wherein the coal pulverizer is plural in number; the sending the variable to a coal mill to enable the coal mill to control the amount of pulverized coal entering a combustion chamber according to the variable comprises:
and controlling the primary air volume of the coal mills to be adjusted simultaneously.
7. The method of claim 1, wherein said coal pulverizer is plural in number, and wherein a plurality of said coal pulverizer types comprises plural; the sending the variable to a coal mill to enable the coal mill to control the amount of pulverized coal entering a combustion chamber according to the variable comprises:
under the condition that the coal mill is a normal-pressure direct-blowing medium-speed coal mill, adjusting the opening degree of the hot primary air baffle according to the variable;
and under the condition that the coal mill is a positive pressure direct blowing type steel ball coal mill, adjusting the opening degree of the hot primary air baffle and the opening degree of an outlet rotary graduator of the coal mill according to the variable.
8. An automatic power generation control device of a generator set is characterized by comprising:
the output module is used for outputting a variable under the condition of receiving the change of the generating load instruction of the unit, wherein the variable is used for controlling the variable quantity of the air quantity of the pulverizing system;
and the control module is used for sending the variable to the coal mill so that the coal mill can control the amount of the pulverized coal entering the combustion chamber according to the variable.
9. The apparatus of claim 8, wherein the control module is configured to:
under the condition that the unit power generation load instruction is increased, outputting a first variable;
outputting the first variable to a primary air volume adjusting plate baffle actuator of the coal mill so as to increase the amount of coal dust entering the combustion chamber;
under the condition that the unit power generation load instruction is reduced, outputting a second variable;
and sending the second variable to a baffle actuator of a primary air volume adjusting plate of the coal mill so as to reduce the coal powder entering the combustion chamber.
10. The apparatus of claim 8, further comprising:
and the setting module is used for setting control instructions in different sequences according to the position of the burner corresponding to the powder making system.
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| CN202111389442.6A CN114172419B (en) | 2021-11-22 | 2021-11-22 | Automatic power generation control method and device for generator set |
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