CN115247802A - Prediction system and prediction method for power plant air pre-heater - Google Patents

Prediction system and prediction method for power plant air pre-heater Download PDF

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Publication number
CN115247802A
CN115247802A CN202210706534.0A CN202210706534A CN115247802A CN 115247802 A CN115247802 A CN 115247802A CN 202210706534 A CN202210706534 A CN 202210706534A CN 115247802 A CN115247802 A CN 115247802A
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message
power plant
controller
air preheater
messages
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方丹
潘嘉
时春
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Jiangsu Future Wisdom Information Technology Co ltd
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Jiangsu Future Wisdom Information Technology Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

A power plant air preheater prediction system and a prediction method comprise the following steps: the inlet of the power plant air preheater is provided with a first temperature sensor and a first pressure sensor, the outlet of the power plant air preheater is provided with a second temperature sensor and a second pressure sensor, and a current sensor is connected between a motor of the air preheater and a power supply of the air preheater in series; the temperature sensor I, the pressure sensor I, the temperature sensor II, the pressure sensor II, the current sensor, the wireless communication module and the liquid crystal screen are electrically connected with the controller; the defects that in the prior art, a centralized monitoring system aiming at the information of the power plant air pre-heater is not available, a prediction system aiming at the blockage of the power plant air pre-heater is not available, and the load of the controller for transmitting the information of the power plant air pre-heater to be stored is higher and higher, and finally the channel cannot be accessed are overcome.

Description

Prediction system and prediction method for power plant air pre-heater
Technical Field
The invention relates to the technical field of air preheater prediction, in particular to a prediction system and a prediction method for an air preheater of a power plant.
Background
An air preheater (also referred to as an air preheater) of a power plant is a preheating device for improving heat exchange performance of a boiler and reducing heat loss. The air preheater has the function of conducting heat carried in flue gas exhausted from a flue at the tail part of the boiler to air before entering the boiler through the radiating fins so as to preheat the air to a certain temperature.
Generally referred to as an air preheater. Is mainly used for coal-fired power station boilers. The rotary type air conditioner can be divided into a pipe box type and a rotary type, wherein the rotary type air conditioner is divided into a fan cover rotary type and a heating surface rotary type. Utility boilers more commonly employ heated surface rotary preheaters. The application in boilers is generally of the two-bin, three-bin, four-bin type, where four-bin is more commonly used in circulating fluidized bed boilers.
At present, a centralized monitoring system for the information of the power plant air pre-heater, such as the flue gas temperature at the inlet and the outlet of the power plant air pre-heater, the wind pressure at the inlet and the outlet of the power plant air pre-heater, the current signal of the motor of the air pre-heater and the flue gas temperature difference of the air pre-heater, does not exist, and a prediction system for the blockage of the power plant air pre-heater does not exist.
The prior art mainly applies an enhanced graph team detection mode to cut the power plant air pre-heater messages stored on the server, reduces the comparison frequency among the power plant air pre-heater messages, has good compatibility for a structure for storing huge power plant air pre-heater messages, and also improves the implementation efficiency of a privacy protection power plant air pre-heater message channel, so that the prior art ensures good reliability when more than three screening units for the power plant air pre-heater messages are matched and overlapped by applying the characteristics of a nonsingular square matrix and a critical quantity secret mode, and avoids the private messages of a controller for receiving the power plant air pre-heater messages from being acquired by hackers; however, the frequency of channels used by a controller to transmit the plant air pre-heater messages to store in the platform is increased, and the load of the controller to transmit the plant air pre-heater messages to store is higher and higher, and finally the channel cannot be accessed.
Disclosure of Invention
In order to solve the problems, the invention provides a power plant air preheater prediction system and a power plant air preheater prediction method, which effectively overcome the defects that in the prior art, no centralized monitoring system aiming at the information of the power plant air preheater, no prediction system aiming at the blockage of the power plant air preheater and the load of a controller for transmitting the information of the power plant air preheater to be stored are higher and higher, and finally, the channel cannot be accessed.
In order to overcome the defects in the prior art, the invention provides a solution for a power plant air preheater prediction system and method, which comprises the following specific steps:
a power plant air preheater prediction system comprising:
the inlet of the power plant air preheater is provided with a first temperature sensor and a first pressure sensor, the outlet of the power plant air preheater is provided with a second temperature sensor and a second pressure sensor, and a current sensor is connected between a motor of the air preheater and a power supply of the air preheater in series;
the temperature sensor I, the pressure sensor I, the temperature sensor II, the pressure sensor II, the current sensor, the wireless communication module and the liquid crystal screen are electrically connected with the controller;
the controller is connected with a server in a wireless network through a wireless communication module;
the components running on the controller comprise a first transmission component, a second transmission component and a prediction component;
the transmission assembly I is used for subtracting the collected flue gas temperature at the outlet of the power plant air preheater from the flue gas temperature at the inlet of the power plant air preheater to obtain a flue gas temperature difference value of the air preheater, then the controller transmits the power plant air preheater message to the liquid crystal display for display, and the power plant air preheater message is transmitted to the server through the wireless communication module for storage;
the second transmission component is used for transmitting a request instruction to the server;
the prediction component is used for predicting the blockage level of the power plant air preheater according to the power plant air preheater message;
the components running on the server comprise a return component, a message protection component, a message handling component and a task handling component, wherein the return component is used for returning the associated historical message to the controller according to the request instruction, and the controller then transmits the historical message to the touch screen for display; the message protection component is used for processing a set identification code of the controller to obtain an artificial identification code, the message processing component is used for performing cutting processing on the historical message, and the task processing component is used for registering a task given and obtained by the controller;
the controller giving the history message and obtaining the history message later is an interactive controller, the message handling component divides the history message transmitted by the interactive controller into R pieces of sub-messages which are respectively stored in message domains of S servers associated with the interactive controller, R is equal to S before reaching the highest critical amount, the highest critical amount is kept constant after the R reaches the highest critical amount, two pieces of sub-messages are stored in the message domain of a single server, a single piece of sub-message is stored in the message domains of more than two servers, when S is one, the whole history message is stored in the message domain of the controller giving the history message, and R and S are natural numbers;
when another controller obtains history messages of the interactive controller from the message handling component, the message handling component obtains R pieces of sub-messages from a message domain associated with the interactive controller and delivers the R pieces of sub-messages to the another controller, synchronously cuts the sub-messages with the highest message capacity in the whole sub-messages into a pair of new sub-messages according to a ratio of 0.65;
the message protection component protects the set identification code of the controller by constructing the simulation identification code, and the structural equation of the simulation identification code is as follows:
H(u)＝{u1*J(u)+u2*J(u+1)+u3*J(u+2)}％2 4 u is not less than one
And u is not higher than K;
here, H (u) is the content of the u-th bit of the newly constructed simulation identification code, J (u) is the character value of the u-th bit of the set identification code, u1, u2, and u3 are the first variation index, the second variation index, and the third variation index, which are randomly set, respectively, K is the capacity of the set identification code and the simulation identification code, and% is the remainder operator.
The task handling component constructs an attribute field when the controller gives or obtains the historical messages, wherein the attribute field comprises the simulation identification code of the controller, the storage instruction of the historical messages, the obtaining frequency of the historical messages and the message performance, and the derivation equation of the message performance L is as follows:
L＝{M1*S1-M2*S2+M3*S3}*X(S1+S2+S3-1)
here, S1 is the number of good message identifications, S2 is the number of bad message identifications, S3 is the number of no identifications, k1 is the index of good random setting, k2 is the index of bad random setting, k3 is the index of no identification, and X is the base ten logarithmic operator;
the message handling component constructs a detection identifier Y for a single interactive controller, wherein the detection identifier Y is a bit stream, the capacity of the detection identifier Y is consistent with the number R of the sub-messages, one bit of the detection identifier Y is associated with one sub-message, a bit value of the detection identifier Y indicates that the associated sub-message is stored in the message domain associated with the controller, a bit value of zero in the detection identifier Y indicates that the associated sub-message is not stored in the message domain, and the message handling component acquires a complete history message according to the detection of the detection identifier Y;
the flow of the message handling component obtaining the complete history message is as follows:
b-1: sending the entire detection identifier Y to a detection queue;
b-2: randomly selecting a detection identifier Y in the detection queue;
b-3: identifying a bit of the obtained detection identifier Y, wherein the bit is a target bit;
b-4: sending the obtained detection identifier Y to an output queue;
b-5: detecting and clearing the whole detection identifier Y with the destination bit value of one in the detection queue;
b-6: b-2 to B-5 are executed in a circulating way until the detection identifier Y is not in the detection queue;
b-7: acquiring sub-messages of a message domain of an associated controller according to a detection identifier Y in an output queue to combine into a complete history message;
the maximum critical quantity of the number R of the sub-messages is RR1, and the equation is:
RR1＝Z1÷Z2
here, Z1 is the capacity of all history messages, us is the capacity of a single history message;
the message protection component can construct more than two simulation identification codes according to the frequency of the controller related to the storage of historical messages, and the correlation equation of the number S of the simulation identification codes and the frequency R related to the storage is as follows:
S＝C(R÷10+2)
the simulation identification code constructed later is obtained according to the treatment of the previous simulation identification code, and C is a logarithm operator with a base of two.
A prediction method of a power plant air preheater prediction system comprises the following steps:
step 1: the temperature sensor I, the pressure sensor I, the temperature sensor II, the pressure sensor II and the current sensor respectively transmit the sampled smoke temperature of the inlet of the power plant air preheater, the sampled wind pressure value of the inlet of the power plant air preheater, the sampled smoke temperature of the outlet of the power plant air preheater, the sampled wind pressure value of the outlet of the power plant air preheater and the sampled current signal of the motor of the air preheater into the controller;
step 2: the controller subtracts the collected flue gas temperature at the outlet of the power plant air preheater from the flue gas temperature at the inlet of the power plant air preheater to obtain a flue gas temperature difference value of the air preheater, transmits a power plant air preheater message to a liquid crystal display for display, and transmits the power plant air preheater message to a server for storage through a wireless communication module;
the power plant air preheater message comprises a smoke temperature difference value of the air preheater, a smoke temperature of an inlet of the power plant air preheater, a wind pressure value of an inlet of the power plant air preheater, a smoke temperature of an outlet of the power plant air preheater, a wind pressure value of an outlet of the power plant air preheater and a current signal of a motor of the air preheater.
Step 3, if the historical information is to be acquired, the controller transmits a request instruction to the server, then the server transmits the associated historical information back to the controller according to the request instruction, and the controller transmits the historical information to the touch screen for display;
and 4, step 4: the controller also predicts the blockage level of the power plant air preheater according to the power plant air preheater message;
the step 4 specifically includes: the method comprises the steps that a controller adds an immediately-collected smoke temperature difference value of an air preheater of the power plant, a smoke temperature of an inlet of the air preheater of the power plant, a wind pressure value of an inlet of the air preheater of the power plant, a smoke temperature of an outlet of the air preheater of the power plant and a wind pressure value of an outlet of the air preheater of the power plant to obtain a first sum, and divides the first sum by a smoke temperature difference value of the air preheater of the power plant under the condition of complete blockage, a smoke temperature of the inlet of the air preheater of the power plant, a wind pressure value of the inlet of the air preheater of the power plant, a smoke temperature of the outlet of the air preheater of the power plant and a wind pressure value of the outlet of the air preheater of the power plant to obtain a second sum, so that an obtained quotient serves as a blockage grade of the air preheater of the power plant, and finally the blockage grade is transmitted to a touch screen to be displayed;
the plugging grade is as follows: under the condition that the quotient value is lower than 0.5, the air preheater of the power plant is determined to be in a normal condition, and no blockage occurs;
under the condition that the quotient value is between 0.5 and 0.7, the air preheater of the power plant is determined to be in a slight blockage condition;
under the condition that the quotient value is between 0.7 and 0.9, the air preheater of the power plant is determined to be in a moderate blockage condition;
and under the condition that the quotient value is higher than 0.9, the air preheater of the power plant is determined to be in a heavy blockage condition.
The step 2 and the step 3 specifically comprise:
step A-1: the controller transmits the own power plant air preheater message to a message handling component running on the server, and the message handling component transmits the power plant air preheater message to a message protection component running on the server;
step A-2: the method comprises the steps that a power plant air preheater message is stored, then a storage instruction in the message is taken out, the storage instruction is transmitted to a task processing component running on a server, the message protection component modulates the power plant air preheater message and then transmits the modulated power plant air preheater message to the task processing component, and the task processing component combines the storage instruction with the modulated power plant air preheater message and then registers the combined storage instruction and the modulated power plant air preheater message in an attribute domain;
step A-3: the controller reads the attribute field through a transmission request instruction to obtain a storage instruction, history information is obtained from the message handling component according to the storage instruction, the message handling component transmits the history information to the message protection component, the message protection component transmits the history information subjected to modulation processing to the task handling component, and the task handling component transmits the history information subjected to modulation processing back to the controller and transmits the demodulated history information to the touch screen for display after demodulation;
step A-4: the task handling component also registers the modulated processed history message with the request instruction serving as a get message task in the attribute domain.
The task processing component contains the acquisition frequency and the message performance of the historical messages in the attribute domain, when an initial acquirer of the historical messages registers the historical messages in the attribute domain for the first time, the acquisition frequency is one, then a controller acquires the historical messages and increases the acquisition frequency, the controller can identify the historical messages after acquiring the historical messages, the task processing component acquires the message performance of the historical messages according to identification deduction, and when the latter attribute domain is to be constructed, the acquisition frequency and the message performance of the historical messages are refreshed;
the derivation equation for the assumed message performance is:
L＝{M1*S1-M2*S2+M3*S3}*X(S1+S2+S3-1)
here, S1 is the number of good message recognitions, S2 is the number of bad message recognitions, S3 is the number of no recognitions, k1 is an index of good recognitions that is randomly set, k2 is an index of bad recognitions that is randomly set, k3 is an index of no recognitions, and X is a base-ten logarithmic operator.
After S controllers obtain a history message, the history message is divided into sub-messages, one sub-message is stored in an associated message domain of more than two controllers, R has a highest critical amount, R coincides with S before R reaches the highest critical amount, and R remains constant after R reaches the highest critical amount, the highest critical amount of R is RR1, the size of which is related to the size Suze of the entire history message, and the equation is:
RR1＝Z1÷Z2
here, Z1 is the capacity of the entire history message, and Us is the capacity of the single history message.
Before R reaches the maximum critical amount, when a further controller obtains history messages of the interactive controller towards the message handling component, the message handling component obtains R pieces of sub-messages to be transmitted to the further controller towards a message domain associated with the interactive controller, synchronously cuts the sub-message with the highest message capacity in the whole sub-messages into a pair of new sub-messages according to the ratio of 0.65;
when R reaches the highest critical amount, when a further controller obtains history messages towards the message handling component, the message handling component obtains R pieces of sub-messages at the message domain associated with the controller to form complete history messages to be transmitted to the further controller, and directly stores a pair of sub-messages with the lowest total message domain amount in the message domain associated with the further controller;
the message handling component sets a detection identifier Y to a controller related to storing the sub-messages, wherein the detection identifier Y is a bit stream, the detection identifier Y changes with other controllers after acquiring history messages, the capacity of the detection identifier Y is consistent with the number R of the sub-messages, the sub-messages are related to one bit in the detection identifier Y, a bit value in the detection identifier Y indicates that the related sub-messages are stored in the message domain related to the controller, and a bit value of zero in the detection identifier Y indicates that the related sub-messages are not stored in the message domain related to the controller;
before R reaches the maximum threshold amount, a message field is associated with a detection identifier Y;
after R reaches the maximum threshold amount, more than two controller message fields are associated with a detection identifier Y;
the message handling component constructs an association library of the detection identifier Y and the controller message domain;
the flow of the message handling component obtaining the complete history message is as follows:
b-1: sending the entire detection identifier Y to a detection queue;
b-2: randomly taking a detection identifier Y in the detection queue;
b-3: identifying a bit of the obtained detection identifier Y, wherein the bit is a target bit;
b-4: sending the obtained detection identifier Y to an output queue;
b-5: detecting and clearing the whole detection identifier Y with the destination bit value of one in the detection queue;
b-6: b-2 to B-5 are executed in a circulating mode until the detection identifier Y is not in the detection queue;
b-7: the sub-messages of the message domain of the associated controller are obtained according to the detection identifier Y in the output queue to be combined into a complete history message.
The method for detecting the change of the identifier Y comprises the following steps:
initially identifying the associated bit in the detection identifier Y of the highest capacity sub-message before R reaches the highest critical amount, the bit serving as the delimiting bit;
for the detection identifier Y with the message field, the detection identifier Y is cut into a head identifier, a transition identifier and a tail identifier according to the boundary position, if the bit value of the boundary position is zero, the transition identifier is changed into a pair of bits with the bit value of zero, the head identifier, the transition identifier and the tail identifier form a new detection identifier Y again, if the bit value of the boundary position is one, the transition identifier is changed into a pair of bits with the bit value of zero and the other bit value of one according to a new sub-message stored in the message field associated with the controller, and the head identifier, the transition identifier and the tail identifier form a new detection identifier Y again;
setting the transition identifier as a pair of bits with a bit value of one, setting the bit values of all the bits on the head identifier and the tail identifier as zero aiming at the detection identifier Y of the message field of the other controller, and sequentially combining the head identifier, the transition identifier and the tail identifier into a new detection identifier Y;
when R reaches the maximum critical amount, keeping the detection identifier Y with the message field constant, wherein the detection identifier Y of the other controller message field is obtained by setting the associated bit of the stored sub-message to one and setting the bit value of the other bit to zero;
the message handling component is provided with a sequence library of the sub-messages, and the sequence library is used for registering bit sequences of the sub-messages in the detection identifier Y;
when the controller transmits the identification of the history message to the message handling component, the pointer value of the message domain of the synchronized transmission controller is synchronously transmitted, the message handling component obtains the associated detection identifier according to the association library, obtains another detection identifier Y with one value at the same bit according to the bit with one value in the detection identifier Y, the other detection identifier Y is used as a proofreading detection identifier, the message handling component obtains the sub-message in the message domain of the associated controller through the proofreading detection identifier and carries out proofreading with the sub-message in the message domain of the transmission identification, when the proofreading is the same, the identification is correct, and the identification is transmitted to the message handling component for deriving the message performance of the history message;
the message protection component constructs a controller message protection library, a register in the protection library has a set identification code of a controller and two or more associated simulation identification codes, the simulation identification codes indicate that the power plant air preheater messages obtained by the controller are in an attribute domain, the frequency of the stored historical messages of the controller is higher, the number of the simulation identification codes is higher, and the number S of the simulation identification codes and the associated equation of the stored frequency R are as follows:
S＝C(R÷10+2)
c is a base two logarithm operator;
when the simulation identification code is constructed first, the simulation identification code is obtained according to the disposal of the set identification code, when the simulation identification code is constructed for more than two times, the newly constructed simulation identification code is obtained according to the disposal of the simulation identification code of the previous time, and the structural equation of the simulation identification code is as follows:
H(u)＝{u1*J(u)+u2*J(u+1)+u3*J(u+2)}％2 4 u is not less than one
And u is not higher than K;
here, H (u) is the content of the u-th bit of the newly structured pseudo identifier, J (u) is the character value of the u-th bit of the set identifier, u1, u2, and u3 are the first variation index, the second variation index, and the third variation index, which are randomly set, respectively, K is the capacity of the set identifier and the pseudo identifier, and% is the remainder operator.
The invention has the beneficial effects that:
the method combines the steps 1 to 4 to complete a centralized monitoring system aiming at the information of the power plant air pre-heater and a prediction system aiming at the blockage of the power plant air pre-heater; the invention also refreshes the set identification code by the simulation identification code and registers the identification code in the attribute domain to form primary privacy protection for the interactive controller, the information of the air preheater in the power plant is cut and stored in the information domain of the server, the associated controller information domain can change when the historical information is retrieved, secondary privacy protection for the interactive controller is formed, the information performance of the historical information is registered in the attribute domain, and the information performance can serve as the basis for judging whether the historical information is to be retrieved by another controller under the condition of privacy protection for the controller; the defects that in the prior art, a centralized monitoring system aiming at the information of the power plant air pre-heater is not available, a prediction system aiming at the blockage of the power plant air pre-heater is not available, and the load of the controller for transmitting the information of the power plant air pre-heater to be stored is higher and higher, and finally the channel cannot be accessed are overcome.
Drawings
FIG. 1 is a schematic diagram of the structure of the components of the present invention operating on a controller.
FIG. 2 is a block diagram of the components of the present invention operating on a server.
Fig. 3 is a flow chart of steps 1 through 4 of the present invention.
FIG. 4 is a flow chart of step A-1 through step A-4 of the present invention.
FIG. 5 is a flow chart of step B-1 through step B-7 of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
As shown in fig. 1-5, the power plant air preheater prediction system includes:
the inlet of the power plant air preheater is provided with a first temperature sensor and a first pressure sensor, the outlet of the power plant air preheater is provided with a second temperature sensor and a second pressure sensor, and a current sensor is connected between a motor of the air preheater and a power supply of the air preheater in series;
the temperature sensor I, the pressure sensor I, the temperature sensor II, the pressure sensor II, the current sensor, the wireless communication module and the liquid crystal screen are electrically connected with the controller;
the controller is connected with a server in a wireless network through a wireless communication module; the controller can be a single chip microcomputer or an ARM chip, the wireless communication module can be a WuFu module or a 4G module, and the wireless network can be a WKAN or 4G network.
The components running on the controller comprise a first transmission component, a second transmission component and a prediction component;
the transmission assembly I is used for subtracting the collected flue gas temperature at the outlet of the power plant air preheater from the flue gas temperature at the inlet of the power plant air preheater to obtain a flue gas temperature difference value of the air preheater, then the controller transmits the power plant air preheater message to the liquid crystal display for display, and the power plant air preheater message is transmitted to the server through the wireless communication module for storage;
the second transmission component is used for transmitting a request instruction to the server;
the prediction component is used for predicting the blockage level of the power plant air preheater according to the power plant air preheater message;
the components running on the server comprise a return component, a message protection component, a message processing component and a task processing component, wherein the return component is used for returning the associated historical messages to the controller according to the request instruction, and the controller transmits the historical messages to the touch screen for display; the message protection component is used for processing a set identification code of the controller to obtain an artificial identification code, the message processing component is used for performing cutting processing on the historical message, and the task processing component is used for registering a task given and obtained by the controller;
the controller giving the history messages and obtaining the history messages later is an interactive controller, the message handling component divides the history messages transmitted by the interactive controller into R pieces of sub-messages which are respectively stored in message domains of S servers associated with the interactive controller, R is equal to S before reaching the highest critical amount, the highest critical amount is kept constant after the R reaches the highest critical amount, two pieces of sub-messages are stored in the message domain of a single server, and a single piece of sub-message is stored in the message domains of more than two servers;
when another controller obtains history messages of the interactive controller from the message handling component, the message handling component obtains R pieces of sub-messages from a message domain associated with the interactive controller and delivers the R pieces of sub-messages to the another controller, synchronously cuts the sub-messages with the highest message capacity in the whole sub-messages into a pair of new sub-messages according to a ratio of 0.65; here the further controller is also an interactive controller.
The message protection component protects the set identification code of the controller by constructing the simulation identification code, and the structural equation of the simulation identification code is as follows:
H(u)＝{u1*J(u)+u2*J(u+1)+u3*J(u+2)}％2 4 u is not less than one and u is not more thanK；
Here, H (u) is the content of the u-th bit of the newly constructed simulation identification code, J (u) is the character value of the u-th bit of the set identification code, u1, u2, and u3 are respectively a change index one, a change index two, and a change index three that are randomly set, K is the capacity of the set identification code and the simulation identification code, and in particular, J (K + 1) = J (1), J (K + 2) = J (2), and% is the remainder operator; the set identification code of the controller is an identification code that uniquely identifies the controller.
The task handling component constructs an attribute field when the controller gives or obtains the historical messages, wherein the attribute field comprises the simulation identification code of the controller, the storage instruction of the historical messages, the obtaining frequency of the historical messages and the message performance, and the derivation equation of the message performance L is as follows:
L＝{M1*S1-M2*S2+M3*S3}*X(S1+S2+S3-1)
here, S1 is the number of good message identifications, S2 is the number of bad message identifications, S3 is the number of no identifications, k1 is the index of good random setting, k2 is the index of bad random setting, k3 is the index of no identification, and X is the base ten logarithmic operator; the message is preferably considered to be primarily a message delivered to the server via the message for a duration that is not less than a set duration, if less than, the message is preferably considered, and if not less than, the message is not preferably considered.
The server may confirm whether to retrieve the associated history message via the retrieval frequency and message performance in the attribute domain.
The message handling component constructs a detection identifier Y for a single interactive controller, wherein the detection identifier Y is a bit stream, the capacity of the detection identifier Y is consistent with the number R of the sub-messages, one bit of the detection identifier Y is associated with one sub-message, a bit value of the detection identifier Y indicates that the associated sub-message is stored in the message domain associated with the controller, a bit value of zero in the detection identifier Y indicates that the associated sub-message is not stored in the message domain, and the message handling component acquires a complete history message according to the detection of the detection identifier Y;
the flow of the message handling component obtaining the complete history message is as follows:
b-1: sending the entire detection identifier Y to a detection queue;
b-2: randomly taking a detection identifier Y in the detection queue;
b-3: identifying a bit of a bit value one in the detection identifier Y obtained in B-2, wherein the bit is a target bit;
b-4: sending the detection identifier Y obtained in B-2 to the output queue;
b-5: detecting and clearing the whole detection identifier Y with the destination bit value of one in the detection queue;
b-6: b-2 to B-5 are executed in a circulating mode until the detection identifier Y is not in the detection queue;
b-7: acquiring sub-messages of a message domain of an associated controller according to a detection identifier Y in an output queue to combine into a complete history message;
the maximum critical quantity of the number R of the sub-messages is RR1, and the equation is:
RR1＝Z1÷Z2
here, Z1 is the capacity of all history messages, us is the capacity of a single history message;
the message protection component can construct more than two simulation identification codes according to the frequency of the controller related to the storage of historical messages, and the correlation equation of the number S of the simulation identification codes and the frequency R related to the storage is as follows:
S＝C(R÷10+2)
the simulation identification code constructed later is obtained according to the treatment of the previous simulation identification code, and C is a logarithm operator with a base of two.
The prediction method of the power plant air preheater prediction system comprises the following steps:
step 1: the temperature sensor I, the pressure sensor I, the temperature sensor II, the pressure sensor II and the current sensor respectively transmit the sampled smoke temperature of the inlet of the power plant air preheater, the sampled wind pressure value of the inlet of the power plant air preheater, the sampled smoke temperature of the outlet of the power plant air preheater, the sampled wind pressure value of the outlet of the power plant air preheater and the sampled current signal of the motor of the air preheater into the controller;
step 2: the controller subtracts the flue gas temperature of the inlet of the power plant air preheater from the flue gas temperature of the outlet of the power plant air preheater to obtain a flue gas temperature difference value of the air preheater, transmits a power plant air preheater message to a liquid crystal display for display, and transmits the power plant air preheater message to a server for storage through a wireless communication module;
the power plant air preheater message comprises a smoke temperature difference value of the air preheater, a smoke temperature of an inlet of the power plant air preheater, a wind pressure value of an inlet of the power plant air preheater, a smoke temperature of an outlet of the power plant air preheater, a wind pressure value of an outlet of the power plant air preheater and a current signal of a motor of the air preheater.
Step 3, if the historical information is to be acquired, the controller transmits a request instruction to the server, then the server transmits the associated historical information back to the controller according to the request instruction, and the controller transmits the historical information to the touch screen for display; if the history message is to be retrieved, the controller may transmit the request instruction to the server by: the request instruction is input on the interactive interface of the touch screen, and then transmitted to the controller and transmitted to the server through the controller. The historical message is the historical plant air preheater message.
And 4, step 4: the controller also predicts the blockage level of the power plant air preheater according to the power plant air preheater message;
the step 4 specifically includes: the controller adds the immediately collected flue gas temperature difference value of the air pre-heater of the power plant, the flue gas temperature of the inlet of the air pre-heater of the power plant, the wind pressure value of the inlet of the air pre-heater of the power plant, the flue gas temperature of the outlet of the air pre-heater of the power plant and the wind pressure value of the outlet of the air pre-heater of the power plant to obtain a first sum, and divides the first sum by the flue gas temperature difference value of the air pre-heater of the power plant under the condition of complete blockage, the flue gas temperature of the inlet of the air pre-heater of the power plant, the wind pressure value of the inlet of the air pre-heater of the power plant, the flue gas temperature of the outlet of the air pre-heater of the power plant and the wind pressure value of the outlet of the air pre-heater of the power plant to obtain a second sum, so that the obtained quotient serves as the blockage level of the air pre-heater of the power plant, and finally transmits the blockage level to the touch screen for display;
the plugging grade is as follows: under the condition that the quotient value is lower than 0.5, the air preheater of the power plant is determined to be in a normal condition, and no blockage occurs;
under the condition that the quotient value is between 0.5 and 0.7, the air preheater of the power plant is determined to be in a slight blockage condition;
under the condition that the quotient value is between 0.7 and 0.9, the air preheater of the power plant is determined to be in a moderate blockage condition;
under the condition that the quotient value is higher than 0.9, the air preheater of the power plant is determined to be in a heavy blockage condition.
The step 2 and the step 3 specifically comprise:
step A-1: the controller transmits the own power plant air preheater message to a message handling component running on the server, and the message handling component transmits the power plant air preheater message to a message protection component running on the server;
step A-2: the method comprises the steps that a power plant air preheater message is stored, then a storage instruction in the message is taken out, the storage instruction is transmitted to a task processing component running on a server, the message protection component modulates the power plant air preheater message and then transmits the modulated power plant air preheater message to the task processing component, and the task processing component combines the storage instruction with the modulated power plant air preheater message and then registers the combined storage instruction and the modulated power plant air preheater message in an attribute domain; the modulation method can be an existing modulation method.
Step A-3: the controller reads the attribute field through a transmission request instruction to obtain a storage instruction, history information is obtained from the message handling component according to the storage instruction, the message handling component transmits the history information to the message protection component, the message protection component transmits the history information subjected to modulation processing to the task handling component, and the task handling component transmits the history information subjected to modulation processing back to the controller and transmits the demodulated history information to the touch screen for display after demodulation;
step A-4: the task handling component also registers the modulated processed history message with the request instruction serving as a get message task in the attribute domain.
The task processing component contains the acquisition frequency and the message performance of the historical messages in the attribute domain, when an initial acquirer of the historical messages registers the historical messages in the attribute domain for the first time, the acquisition frequency is one, then a controller acquires the historical messages and increases the acquisition frequency, the controller can identify the historical messages after acquiring the historical messages, the task processing component acquires the message performance of the historical messages according to identification deduction, and when the latter attribute domain is to be constructed, the acquisition frequency and the message performance of the historical messages are refreshed;
the derivation equation for the assumed message performance is:
L＝{M1*S1-M2*S2+M3*S3}*X(S1+S2+S3-1)
here, S1 is the number of good message identifications, S2 is the number of bad message identifications, S3 is the number of no identifications, k1 is the index of good identification set at random, k2 is the index of bad identification set at random, k3 is the index of no identification, and X is the base ten logarithmic operator. The message is preferably considered to be primarily a message delivered to the server via the message for a duration that is not less than a set duration, if less than, the message is preferably considered, and if not less than, the message is not preferably considered.
The controller confirms whether the associated historical message is acquired or not through the acquisition frequency and the message performance in the attribute domain;
the message handling component dispersedly stores the historical messages in the message domain associated with the controller which has obtained the historical messages, and particularly stores the historical messages in the message domain associated with the initial obtaining party when the historical messages are not obtained by other controllers;
after S controllers obtain a history message, the history message is divided into sub-messages, one sub-message is stored in an associated message domain of more than two controllers, R has a highest critical amount, R coincides with S before R reaches the highest critical amount, and R remains constant after R reaches the highest critical amount, the highest critical amount of R is RR1, the size of which is related to the size Suze of the entire history message, and the equation is:
RR1＝Z1÷Z2
here, Z1 is the capacity of the entire history message, and Us is the capacity of the single history message.
Before R reaches the maximum critical amount, when a further controller obtains history messages of the interactive controller towards the message handling component, the message handling component obtains R pieces of sub-messages to be transmitted to the further controller towards a message domain associated with the interactive controller, synchronously cuts the sub-message with the highest message capacity in the whole sub-messages into a pair of new sub-messages according to the ratio of 0.65; here the further controller is also an interactive controller.
When R reaches the highest critical amount, when a further controller obtains history messages towards the message handling component, the message handling component obtains R pieces of sub-messages at the message domain associated with the controller to form complete history messages to be transmitted to the further controller, and directly stores a pair of sub-messages with the lowest total message domain amount in the message domain associated with the further controller;
the message handling component sets a detection identifier Y to a controller related to storing the sub-messages, wherein the detection identifier Y is a bit stream, the detection identifier Y changes with other controllers after acquiring history messages, the capacity of the detection identifier Y is consistent with the number R of the sub-messages, the sub-messages are related to one bit in the detection identifier Y, a bit value one in the detection identifier Y indicates that the related sub-messages are stored in the message domain related to the controller, a bit value zero in the detection identifier Y indicates that the related sub-messages are not stored in the related message domain, and the detection identifier Y has a bit value one;
before R reaches the maximum threshold amount, a message field is associated with a detection identifier Y;
after R reaches the maximum threshold amount, more than two controller message fields are associated with a detection identifier Y;
the message handling component constructs an association library of the detection identifier Y and the controller message domain;
the flow of the message handling component obtaining the complete history message is as follows:
b-1: sending the entire detection identifier Y to a detection queue;
b-2: randomly taking a detection identifier Y in the detection queue;
b-3: identifying a bit of a bit value one in the detection identifier Y obtained in B-2, wherein the bit is a target bit;
b-4: sending the detection identifier Y obtained in B-2 to the output queue;
b-5: detecting and clearing the whole detection identifier Y with the destination bit value of one in the detection queue;
b-6: b-2 to B-5 are executed in a circulating mode until the detection identifier Y is not in the detection queue;
b-7: the sub-messages of the message domain of the associated controller are obtained according to the detection identifier Y in the output queue to be combined into a complete history message.
The method for detecting the change of the identifier Y comprises the following steps:
initially identifying the associated bit of the highest capacity sub-message within the detection identifier Y, which serves as a delimiting bit, before R reaches the highest critical amount;
for the detection identifier Y with the message field, the detection identifier Y is cut into a head identifier, a transition identifier and a tail identifier according to the boundary position, if the bit value of the boundary position is zero, the transition identifier is changed into a pair of bits with the bit value of zero, the head identifier, the transition identifier and the tail identifier form a new detection identifier Y again, if the bit value of the boundary position is one, the transition identifier is changed into a pair of bits with the bit value of zero and the other bit value of one according to a new sub-message stored in the message field associated with the controller, and the head identifier, the transition identifier and the tail identifier form a new detection identifier Y again;
aiming at the detection identifier Y of the message field of the other controller, setting the transition identifier as a pair of bits with one bit value, setting the bit values of all the bits on the head identifier and the tail identifier as zero, and sequentially combining the head identifier, the transition identifier and the tail identifier into a new detection identifier Y;
when R reaches the maximum critical amount, keeping the detection identifier Y with the message field constant, wherein the detection identifier Y of the other controller message field is obtained by setting the associated bit of the stored sub-message to one and setting the bit value of the other bit to zero;
the message handling component is provided with a sequence library of the sub-messages, the sequence library is used for registering bit sequences of the sub-messages in the detection identifier Y, when the sequence library of the sub-messages is changed, only the detection identifier Y in the association library of the detection identifier Y and the controller message domain needs to be changed in an association manner, in B-5, to improve detection efficiency, the sequence library of the sub-messages is changed, target bits are located at two tail bits of the detection identifier Y, and the message handling component only needs to distinguish and detect the detection identifier Y to be cleaned up from the two tail bits of the detection identifier Y;
when the controller transmits the identification of the history message to the message handling component, the pointer value of the message domain of the synchronized transmission controller is synchronously transmitted, the message handling component obtains the associated detection identifier according to the association library, obtains another detection identifier Y with one value at the same bit according to the bit with one value in the detection identifier Y, the other detection identifier Y is used as a proofreading detection identifier, the message handling component obtains the sub-message in the message domain of the associated controller through the proofreading detection identifier and carries out proofreading with the sub-message in the message domain of the transmission identification, when the proofreading is the same, the identification is correct, and the identification is transmitted to the message handling component for deriving the message performance of the history message;
the message protection component constructs a controller message protection library, a register in the protection library is used for registering a set identification code of a controller and two or more related simulation identification codes, the simulation identification codes indicate that the plant air preheater messages obtained by the controller are in an attribute domain, the controller relates to the stored historical messages more frequently and the simulation identification codes are higher in number, and the number S of the simulation identification codes and the correlation equation relating to the stored frequency R are as follows:
S＝C(R÷10+2)
c is a base two logarithm operator;
when the simulation identification code is constructed first, the simulation identification code is obtained according to the disposal of the set identification code, when the simulation identification code is constructed for more than two times, the newly constructed simulation identification code is obtained according to the disposal of the simulation identification code of the previous time, and the structural equation of the simulation identification code is as follows:
H(u)＝{u1*J(u)+u2*J(u+1)+u3*J(u+2)}％2 4 u is not less than one and u is not greater than K;
here, H (u) is the content of the u-th bit of the newly constructed simulation identification code, J (u) is the character value of the u-th bit of the set identification code, u1, u2, and u3 are respectively a change index one, a change index two, and a change index three that are randomly set, K is the capacity of the set identification code and the simulation identification code, and in particular, J (K + 1) = J (1), J (K + 2) = J (2), and% is the remainder operator; the set identification code of the controller is an identification code that uniquely identifies the controller.
Having thus described the present invention by way of example only, it will be apparent to those skilled in the art that the present disclosure is not limited to the embodiments described above, and that various changes, modifications and substitutions can be made without departing from the scope of the invention.

Claims (9)

1. A power plant air preheater prediction system, comprising:
the inlet of the power plant air preheater is provided with a first temperature sensor and a first pressure sensor, the outlet of the power plant air preheater is provided with a second temperature sensor and a second pressure sensor, and a current sensor is connected between a motor of the air preheater and a power supply of the air preheater in series;
the temperature sensor I, the pressure sensor I, the temperature sensor II, the pressure sensor II, the current sensor, the wireless communication module and the liquid crystal screen are electrically connected with the controller;
the controller is connected with a server in a wireless network through a wireless communication module;
the components running on the controller comprise a first transmission component, a second transmission component and a prediction component;
the transmission assembly I is used for subtracting the collected flue gas temperature at the outlet of the power plant air preheater from the flue gas temperature at the inlet of the power plant air preheater to obtain a flue gas temperature difference value of the air preheater, then the controller transmits the power plant air preheater message to the liquid crystal display for display, and the power plant air preheater message is transmitted to the server through the wireless communication module for storage;
the second transmission component is used for transmitting a request instruction to the server;
the prediction component is used for predicting the blockage level of the power plant air preheater according to the power plant air preheater message;
the components running on the server comprise a return component, a message protection component, a message handling component and a task handling component, wherein the return component is used for returning the associated historical message to the controller according to the request instruction, and the controller then transmits the historical message to the touch screen for display; the message protection component is used for processing the set identification code of the controller to obtain the simulation identification code, the message processing component is used for performing cutting processing on the historical message, and the task processing component is used for registering the task given and obtained by the controller.
2. The power plant air preheater prediction system of claim 1, wherein the controller giving the historical information and obtaining the historical information later is an interactive controller, the information processing component divides the historical information transmitted by the interactive controller into R pieces of sub-information, the R pieces of sub-information are respectively stored in information fields of S servers associated with the interactive controller, R is equal to S before reaching the highest critical amount, and after reaching the highest critical amount, the highest critical amount is kept constant;
when another controller obtains history messages of the interactive controller from the message handling component, the message handling component obtains R pieces of sub-messages from a message domain associated with the interactive controller and delivers the R pieces of sub-messages to the another controller, synchronously cuts the sub-messages with the highest message capacity in the whole sub-messages into a pair of new sub-messages according to a ratio of 0.65;
the message protection component protects the set identification code of the controller by constructing the simulation identification code, and the structural equation of the simulation identification code is as follows:
H(u)＝{u1*J(u)+u2*J(u+1)+u3*J(u+2)}％2 4 u is not less than one and u is not greater than K;
here, H (u) is the content of the u-th bit of the newly constructed simulation identification code, J (u) is the character value of the u-th bit of the set identification code, u1, u2, and u3 are the first variation index, the second variation index, and the third variation index, which are randomly set, respectively, K is the capacity of the set identification code and the simulation identification code, and% is the remainder operator.
3. The power plant air preheater prediction system of claim 1, wherein the task handling component constructs an attribute field when the historical messages are given or retrieved by the controller, the attribute field including simulation identification codes of the controller, storage instructions of the historical messages, and retrieval frequency and message performance of the historical messages, and the derivation equation of the message performance L is:
L＝{M1*S1-M2*S2+M3*S3}*X(S1+S2+S3-1)
here, S1 is the number of good message identifications, S2 is the number of bad message identifications, S3 is the number of no identifications, k1 is the index of good random setting, k2 is the index of bad random setting, k3 is the index of no identification, and X is the base ten logarithmic operator;
the message handling component constructs a detection identifier Y for a single interactive controller, wherein the detection identifier Y is a bit stream, the capacity of the detection identifier Y is consistent with the number R of the sub-messages, one bit of the detection identifier Y is associated with one sub-message, a bit value of the detection identifier Y indicates that the associated sub-message is stored in the message domain associated with the controller, a bit value of zero in the detection identifier Y indicates that the associated sub-message is not stored in the message domain, and the message handling component acquires a complete history message according to the detection of the detection identifier Y;
the flow of the message handling component obtaining the complete history message is as follows:
b-1: sending the entire detection identifier Y to a detection queue;
b-2: randomly taking a detection identifier Y in the detection queue;
b-3: identifying a bit in which a bit value one in the obtained detection identifier Y is located, wherein the bit is a target bit;
b-4: sending the obtained detection identifier Y to an output queue;
b-5: detecting and clearing the whole detection identifier Y with the destination bit value of one in the detection queue;
b-6: b-2 to B-5 are executed in a circulating mode until the detection identifier Y is not in the detection queue;
b-7: obtaining sub-messages of the message domain of the associated controller according to the detection identifier Y in the output queue to combine into a complete history message;
the highest critical quantity of the number R of the sub-messages is RR1, and the equation is as follows:
RR1＝Z1÷Z2
here, Z1 is the capacity of all history messages, us is the capacity of a single history message;
the message protection component can construct more than two simulation identification codes according to the frequency of the controller related to the storage of historical messages, and the correlation equation of the number S of the simulation identification codes and the frequency R related to the storage is as follows:
S＝C(R÷10+2)
the simulation identification code constructed later is obtained according to the treatment of the previous simulation identification code, and C is a logarithm operator with a base of two.
4. A prediction method of a power plant air preheater prediction system is characterized by comprising the following steps:
step 1: the temperature sensor I, the pressure sensor I, the temperature sensor II, the pressure sensor II and the current sensor respectively transmit the sampled smoke temperature of the inlet of the power plant air preheater, the sampled wind pressure value of the inlet of the power plant air preheater, the sampled smoke temperature of the outlet of the power plant air preheater, the sampled wind pressure value of the outlet of the power plant air preheater and the sampled current signal of the motor of the air preheater into the controller;
and 2, step: the controller subtracts the collected flue gas temperature at the outlet of the power plant air preheater from the flue gas temperature at the inlet of the power plant air preheater to obtain a flue gas temperature difference value of the air preheater, transmits a power plant air preheater message to a liquid crystal display for display, and transmits the power plant air preheater message to a server for storage through a wireless communication module;
step 3, if the historical information is to be acquired, the controller transmits a request instruction to the server, then the server transmits the associated historical information back to the controller according to the request instruction, and the controller transmits the historical information to the touch screen for display;
and 4, step 4: the controller also predicts the blockage level of the power plant air preheater according to the power plant air preheater message;
the step 2 and the step 3 specifically comprise:
step A-1: the controller transmits the own power plant air preheater message to a message handling component running on the server, and the message handling component transmits the power plant air preheater message to a message protection component running on the server;
step A-2: the method comprises the steps that a power plant air preheater message is stored, then a storage instruction in the message is taken out, the storage instruction is transmitted to a task processing component running on a server, the message protection component modulates the power plant air preheater message and then transmits the modulated power plant air preheater message to the task processing component, and the task processing component combines the storage instruction with the modulated power plant air preheater message and then registers the power plant air preheater message in an attribute domain;
step A-3: the controller reads the attribute field through a transmission request instruction to obtain a storage instruction, history information is obtained from the message handling component according to the storage instruction, the message handling component transmits the history information to the message protection component, the message protection component transmits the history information subjected to modulation processing to the task handling component, and the task handling component transmits the history information subjected to modulation processing back to the controller and transmits the demodulated history information to the touch screen for display after demodulation;
step A-4: the task handling component also registers the modulated processed history message with the request instruction serving as a get message task in the attribute domain.
5. The prediction method of the power plant air preheater prediction system of claim 4, wherein the power plant air preheater message comprises a flue gas temperature difference value of an air preheater, a flue gas temperature of an inlet of the power plant air preheater, a wind pressure value of the inlet of the power plant air preheater, a flue gas temperature of an outlet of the power plant air preheater, a wind pressure value of the outlet of the power plant air preheater and a current signal of a motor of the air preheater;
the step 4 specifically includes: the controller adds the immediately collected flue gas temperature difference value of the air pre-heater of the power plant, the flue gas temperature of the inlet of the air pre-heater of the power plant, the wind pressure value of the inlet of the air pre-heater of the power plant, the flue gas temperature of the outlet of the air pre-heater of the power plant and the wind pressure value of the outlet of the air pre-heater of the power plant to obtain a first sum, and divides the first sum by the flue gas temperature difference value of the air pre-heater of the power plant under the condition of complete blockage, the flue gas temperature of the inlet of the air pre-heater of the power plant, the wind pressure value of the inlet of the air pre-heater of the power plant, the flue gas temperature of the outlet of the air pre-heater of the power plant and the wind pressure value of the outlet of the air pre-heater of the power plant to obtain a second sum, so that the obtained quotient serves as the blockage level of the air pre-heater of the power plant, and finally transmits the blockage level to the touch screen for display;
the plugging grade is as follows: under the condition that the quotient value is lower than 0.5, the air preheater of the power plant is determined to be in a normal condition, and no blockage occurs;
under the condition that the quotient value is between 0.5 and 0.7, the air preheater of the power plant is determined to be in a slight blockage condition;
under the condition that the quotient value is between 0.7 and 0.9, the air preheater of the power plant is determined to be in a moderate blockage condition;
and under the condition that the quotient value is higher than 0.9, the air preheater of the power plant is determined to be in a heavy blockage condition.
6. The power plant air preheater prediction system of claim 4, wherein the task handling component includes a frequency of obtaining the historical messages and a message performance in an attribute domain, the frequency of obtaining is one when an initial obtaining person of the historical messages registers the historical messages in the attribute domain, a controller obtains the historical messages and increases the frequency of obtaining, the controller can identify the historical messages after obtaining the historical messages, the task handling component obtains the message performance of the historical messages according to identification derivation, and the frequency of obtaining the historical messages and the message performance are refreshed when a next attribute domain is to be constructed;
the derivation equation for the assumed message performance is:
L＝{M1*S1-M2*S2+M3*S3}*X(S1+S2+S3-1)
here, S1 is the number of good message identifications, S2 is the number of bad message identifications, S3 is the number of no identifications, k1 is the index of good identification set at random, k2 is the index of bad identification set at random, k3 is the index of no identification, and X is the base ten logarithmic operator.
7. The power plant air pre-heater prediction system prediction method of claim 6, characterized in that after S controllers obtain historical messages, the historical messages are cut into sub-messages, one sub-message is stored in an associated message domain of more than two controllers, R has a highest critical amount, R is consistent with S before R reaches the highest critical amount, and R remains constant after R reaches the highest critical amount, R' S highest critical amount is RR1, the size of which is related to the size Suze of the entire historical message, and the equation is:
RR1＝Z1÷Z2
here, Z1 is the capacity of the entire history message, and Us is the capacity of the single history message.
8. The power plant air preheater prediction system of claim 7, wherein before R reaches the highest critical amount, when a further controller obtains the historical messages of the interactive controller towards the message handling component, the message handling component obtains R pieces of sub-messages to be delivered to the further controller towards the message domain associated with the interactive controller, synchronously cuts the sub-message with the highest message capacity in the whole sub-messages into a pair of new sub-messages according to a ratio of 0.65;
when R reaches the highest critical amount, when a further controller obtains the historical messages towards the message handling component, the message handling component obtains R pieces of sub-messages from the message domain associated with the controller to form complete historical messages, and transmits the complete historical messages to the further controller, and directly stores a pair of sub-messages with the lowest total message domain amount in the message domain associated with the further controller;
the message handling component sets a detection identifier Y to a controller related to storing the sub-messages, wherein the detection identifier Y is a bit stream, the detection identifier Y changes with other controllers after acquiring history messages, the capacity of the detection identifier Y is consistent with the number R of the sub-messages, the sub-messages are related to one bit in the detection identifier Y, a bit value in the detection identifier Y indicates that the related sub-messages are stored in the message domain related to the controller, and a bit value of zero in the detection identifier Y indicates that the related sub-messages are not stored in the message domain related to the controller;
before R reaches the maximum threshold amount, a message field is associated with a detection identifier Y;
after R reaches the maximum threshold amount, more than two controller message fields are associated with a detection identifier Y;
the message handling component constructs an association library of the detection identifier Y and the controller message domain;
the flow of the message handling component obtaining the complete history message is as follows:
b-1: sending the entire detection identifier Y to a detection queue;
b-2: randomly selecting a detection identifier Y in the detection queue;
b-3: identifying a bit of the obtained detection identifier Y, wherein the bit is a target bit;
b-4: sending the obtained detection identifier Y to an output queue;
b-5: detecting and clearing all detection identifiers Y with the destination bit value of one in the detection queue;
b-6: b-2 to B-5 are executed in a circulating mode until the detection identifier Y is not in the detection queue;
b-7: the sub-messages of the message domain of the associated controller are obtained according to the detection identifier Y in the output queue to be combined into a complete history message.
9. The power plant air preheater prediction system of claim 8, wherein the means for detecting a change in the identifier Y comprises:
initially identifying the associated bit in the detection identifier Y of the highest capacity sub-message before R reaches the highest critical amount, the bit serving as the delimiting bit;
for the detection identifier Y which already has a message field, cutting the detection identifier Y into a head identifier, a transition identifier and a tail identifier according to the boundary bit, if the bit value of the boundary bit is zero, changing the transition identifier into a pair of bits with the bit value of zero, and forming the head identifier, the transition identifier and the tail identifier into a new detection identifier Y again;
aiming at the detection identifier Y of the message field of the other controller, setting the transition identifier as a pair of bits with one bit value, setting the bit values of all the bits on the head identifier and the tail identifier as zero, and sequentially combining the head identifier, the transition identifier and the tail identifier into a new detection identifier Y;
when R reaches the maximum critical amount, keeping the detection identifier Y with the message field constant, wherein the detection identifier Y of the other controller message field is obtained by setting the associated bit of the stored sub-message to one and setting the bit value of the other bit to zero;
the message handling component is provided with a sequence library of the sub-messages, and the sequence library is used for registering bit sequences of the sub-messages in the detection identifier Y;
when the controller transmits the identification of the historical message to the message handling component, the pointer value of the message domain of the synchronous transmission controller is synchronously transmitted, the message handling component obtains the associated detection identifier according to the association library, obtains another detection identifier Y with one value at the same bit according to the bit with one value in the detection identifier Y, the other detection identifier Y is used as a checking detection identifier, the message handling component obtains the sub-message in the message domain of the associated controller through checking the detection identifier and carries out checking with the sub-message in the message domain of the transmission identification, when the checking is the same, the identification is correct, and the identification is transmitted to the message handling component for deducing the message performance of the historical message;
the message protection component constructs a controller message protection library, a register in the protection library is used for registering a set identification code of a controller and two or more related simulation identification codes, the simulation identification codes indicate that the plant air preheater messages obtained by the controller are in an attribute domain, the controller relates to the stored historical messages more frequently and the simulation identification codes are higher in number, and the number S of the simulation identification codes and the correlation equation relating to the stored frequency R are as follows:
S＝C(R÷10+2)
c is a base two logarithm operator;
when the simulation identification code is constructed first, the simulation identification code is obtained according to the set identification code disposal, when the simulation identification code is constructed for more than two times, the newly constructed simulation identification code is obtained according to the simulation identification code disposal of the previous time, and the structural equation of the simulation identification code is as follows:
H(u)＝{u1*J(u)+u2*J(u+1)+u3*J(u+2)}％2 4 u is not less than one and u is not greater than K;
here, H (u) is the content of the u-th bit of the newly constructed simulation identification code, J (u) is the character value of the u-th bit of the set identification code, u1, u2, and u3 are the first variation index, the second variation index, and the third variation index, which are randomly set, respectively, K is the capacity of the set identification code and the simulation identification code, and% is the remainder operator.
CN202210706534.0A 2022-06-21 2022-06-21 Prediction system and prediction method for power plant air pre-heater Pending CN115247802A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117103122A (en) * 2023-10-08 2023-11-24 宜兴市科兴光电材料有限公司 Molybdenum sheet polishing detection conveying device and working method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117103122A (en) * 2023-10-08 2023-11-24 宜兴市科兴光电材料有限公司 Molybdenum sheet polishing detection conveying device and working method thereof
CN117103122B (en) * 2023-10-08 2024-02-23 宜兴市科兴光电材料有限公司 Molybdenum sheet polishing detection conveying device and working method thereof

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