CN117452986A

CN117452986A - Steam temperature control method and device, storage medium and electronic equipment

Info

Publication number: CN117452986A
Application number: CN202311457038.7A
Authority: CN
Inventors: 赵伟杰
Original assignee: SHANGHAI XINHUA CONTROL TECHNOLOGY (GROUP) CO LTD
Current assignee: SHANGHAI XINHUA CONTROL TECHNOLOGY (GROUP) CO LTD
Priority date: 2023-11-02
Filing date: 2023-11-02
Publication date: 2024-01-26

Abstract

The application discloses a steam temperature control method and device, a storage medium and electronic equipment, and relates to the technical field of control, wherein the method comprises the following steps: acquiring the current steam flow of a boiler, the current swing angle of a burner and the current flue gas temperature of a superheater inlet in a steam temperature control system of a thermal power plant; acquiring an enthalpy gain model of an inlet and an outlet of the superheater; calculating the current steam flow, the current swing angle and the current flue gas temperature according to an inlet and outlet enthalpy increase model of the superheater to obtain a first inlet and outlet enthalpy increase of the superheater; and calculating according to the first inlet and outlet enthalpy improvement line to obtain a target temperature value of the superheater inlet, and controlling the steam temperature of the steam at the superheater inlet according to the target temperature value. Through this application, the problem that the accuracy to steam temperature control is comparatively low has been solved through PID controller regulation steam temperature among the correlation technique.

Description

Steam temperature control method and device, storage medium and electronic equipment

Technical Field

The present application relates to the field of control technologies, and in particular, to a steam temperature control method and apparatus, a storage medium, and an electronic device.

Background

The thermal power plant steam temperature control system has the object characteristics of large hysteresis, large inertia, nonlinearity, strong coupling and time variation, the influence of fuel and wind on steam temperature is very fast, and as control and regulation of steam temperature, the influence of disturbance-overcoming temperature reduction water on steam temperature is very slow, and fast disturbance is overcome by slow regulation means, so that the steam temperature is difficult to accurately control.

In order to reduce inertia and lag time of the steam temperature object, in the conventional steam temperature control, a PID (Proportional Integral Derivative) controller is generally adopted, and the amount of temperature-reduced water is controlled by adjusting the opening degree of a valve, so that the steam temperature is adjusted. However, in the nonlinear time-varying system of the thermal power plant, the conventional PID controller is difficult to meet the requirement of accurately controlling the steam temperature.

Aiming at the problem that the accuracy of steam temperature control is low due to the fact that the steam temperature is regulated through a PID controller in the related art, no effective solution is proposed at present.

Disclosure of Invention

The main object of the present application is to provide a steam temperature control method and apparatus, a storage medium and an electronic device, so as to solve the problem that in the related art, the accuracy of steam temperature control is relatively low due to the fact that the steam temperature is regulated by a PID controller.

In order to achieve the above object, according to one aspect of the present application, there is provided a steam temperature control method. The method comprises the following steps: acquiring the current steam flow of a boiler, the current swing angle of a burner and the current flue gas temperature of an inlet of a superheater; acquiring a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting on the basis of historical steam flow of the boiler, historical swing angles of the burner, historical flue gas temperatures of a superheater inlet and historical inlet and outlet enthalpy addition of the superheater; calculating the current steam flow, the current swing angle and the current flue gas temperature according to the superheater inlet and outlet enthalpy gain model to obtain a first inlet and outlet enthalpy gain of the superheater; and calculating according to the first inlet and outlet enthalpy improvement row to obtain a target temperature value of the superheater inlet, and taking the target temperature value as a feedforward signal to control the steam temperature of the superheater inlet.

Further, the obtaining of the superheater inlet and outlet enthalpy gain model comprises the following steps: acquiring historical steam flow of the boiler, historical swing angle of the burner, historical flue gas temperature of the superheater inlet and historical inlet and outlet enthalpy gain of the superheater; performing line fitting according to the historical steam flow, the historical swing angle, the historical flue gas temperature and the historical import and export enthalpy improvement, and obtaining an initial superheater import and export enthalpy increase model; and carrying out correction treatment on the initial superheater inlet and outlet enthalpy-increasing model to obtain the superheater inlet and outlet enthalpy-increasing model.

Further, performing correction processing on the initial superheater inlet and outlet enthalpy addition model to obtain the superheater inlet and outlet enthalpy addition model, wherein the method comprises the following steps of: obtaining a first enthalpy of an inlet of the superheater and obtaining a second enthalpy of an outlet of the superheater; calculating according to the first enthalpy and the second enthalpy to obtain second inlet and outlet enthalpy increase of the superheater; constructing a self-adaptive controller according to the second inlet and outlet enthalpy increase of the superheater and the initial superheater inlet and outlet enthalpy increase model; and carrying out correction treatment on the initial superheater inlet and outlet enthalpy-increasing model according to the self-adaptive controller to obtain the superheater inlet and outlet enthalpy-increasing model.

Further, obtaining the first enthalpy of the superheater inlet includes: acquiring a temperature value of water or water vapor at the inlet of the superheater; acquiring a pressure value of water or water vapor at the inlet of the superheater; and calculating according to the temperature value of the water or the water vapor and the pressure value of the water or the water vapor to obtain the first enthalpy.

Further, constructing an adaptive controller according to the second import-export enthalpy gain of the superheater and the initial superheater import-export enthalpy gain model includes: calculating the inlet and outlet enthalpy increment of the superheater through the initial superheater inlet and outlet enthalpy increment model to obtain a third inlet and outlet enthalpy increment; and constructing the self-adaptive controller according to the deviation between the second import and export enthalpy increase and the third import and export enthalpy increase.

Further, according to the first inlet and outlet enthalpy improvement row calculation, obtaining the target temperature value of the superheater inlet includes: acquiring a set third enthalpy of an outlet of the superheater; calculating according to the third enthalpy and the first inlet and outlet enthalpy increment to obtain fourth enthalpy of the superheater inlet; calculating according to the fourth enthalpy and the pressure value of the superheater inlet to obtain the steam entropy of the superheater inlet; and calculating according to the steam entropy and the pressure value of the superheater inlet to obtain the target temperature value.

Further, obtaining a set third enthalpy for an outlet of the superheater includes: acquiring a set steam temperature value of an outlet of the superheater; acquiring a steam pressure value of an outlet of the superheater; and calculating according to the steam temperature value and the steam pressure value to obtain the third enthalpy.

Further, taking the target temperature value as a feedforward signal to control the steam temperature of the superheater inlet includes: and taking the target temperature value as the feedforward signal, and inputting the feedforward signal to a feedforward input end of a steam temperature control system of the thermal power plant so as to perform feedforward feedback control on the steam temperature of the superheater inlet through the steam temperature control system of the thermal power plant, wherein the steam temperature control system of the thermal power plant is the steam temperature control system of the boiler, the burner and the superheater.

In order to achieve the above object, according to another aspect of the present application, there is provided a steam temperature control device. The device comprises: the first acquisition unit is used for acquiring the current steam flow of the boiler, the current swing angle of the burner and the current flue gas temperature of the superheater inlet in the steam temperature control system of the thermal power plant; the second acquisition unit is used for acquiring a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting on the basis of historical steam flow of the boiler, historical swing angles of the burner, historical flue gas temperature of a superheater inlet and historical inlet and outlet enthalpy addition of the superheater; the first calculation unit is used for calculating the current steam flow, the current swing angle and the current flue gas temperature according to the superheater inlet and outlet enthalpy increase model to obtain a first inlet and outlet enthalpy increase of the superheater; and the second calculation unit is used for calculating according to the enthalpy increment of the first inlet and outlet to obtain a target temperature value of the inlet of the superheater, and taking the target temperature value as a feedforward signal to control the steam temperature of the inlet of the superheater.

Further, the second acquisition unit includes: the first acquisition subunit is used for acquiring the historical steam flow of the boiler, the historical swing angle of the burner, the historical flue gas temperature at the inlet of the superheater and the historical inlet and outlet enthalpy increase of the superheater; the fitting subunit is used for performing line fitting according to the historical steam flow, the historical swing angle, the historical flue gas temperature and the historical import and export enthalpy, so as to obtain an initial superheater import and export enthalpy increase model; and the processing subunit is used for carrying out correction processing on the initial superheater inlet and outlet enthalpy addition model to obtain the superheater inlet and outlet enthalpy addition model.

Further, the processing subunit includes: a first acquisition module for acquiring a first enthalpy of an inlet of the superheater and acquiring a second enthalpy of an outlet of the superheater; the first calculation module is used for calculating according to the first enthalpy and the second enthalpy to obtain second inlet and outlet enthalpy increase of the superheater; the construction module is used for constructing a self-adaptive controller according to the second import and export enthalpy increase of the superheater and the initial superheater import and export enthalpy increase model; and the processing module is used for carrying out correction processing on the initial superheater inlet and outlet enthalpy gain model according to the self-adaptive controller to obtain the superheater inlet and outlet enthalpy gain model.

Further, the first acquisition module includes: the first acquisition submodule is used for acquiring the temperature value of water or water vapor at the inlet of the superheater; the second acquisition submodule is used for acquiring the pressure value of water or water vapor at the inlet of the superheater; and the first calculation submodule is used for calculating according to the temperature value of the water or the water vapor and the pressure value of the water or the water vapor to obtain the first enthalpy.

Further, the building module includes: the second calculation submodule is used for calculating the inlet and outlet enthalpy increment of the superheater through the initial superheater inlet and outlet enthalpy increment model to obtain a third inlet and outlet enthalpy increment; and the construction submodule is used for constructing the self-adaptive controller according to the deviation between the second import and export enthalpy gain and the third import and export enthalpy gain.

Further, the second calculation unit includes: a first acquisition subunit for acquiring a set third enthalpy of an outlet of the superheater; the third calculation unit is used for calculating according to the third enthalpy and the first inlet and outlet enthalpy increment row to obtain fourth enthalpy of the superheater inlet; the fourth calculation unit is used for calculating according to the fourth enthalpy and the pressure value of the superheater inlet to obtain the steam entropy of the superheater inlet; and a fifth calculation unit, configured to calculate according to the steam entropy and the pressure value of the superheater inlet, to obtain the target temperature value.

Further, the first acquisition subunit includes: the second acquisition module is used for acquiring a set steam temperature value of an outlet of the superheater; a third acquisition module for acquiring a steam pressure value of an outlet of the superheater; and the second calculation module is used for calculating according to the steam temperature value and the steam pressure value to obtain the third enthalpy.

Further, the second calculation unit includes: and the input subunit is used for taking the target temperature value as the feedforward signal and inputting the feedforward signal into a feedforward input end of a steam temperature control system of the thermal power plant so as to perform feedforward feedback control on the steam temperature of the superheater inlet through the steam temperature control system of the thermal power plant, wherein the steam temperature control system of the thermal power plant is the steam temperature control system of the boiler, the burner and the superheater.

In order to achieve the above object, according to an aspect of the present application, there is provided a computer-readable storage medium storing a program, wherein the program, when run, controls an apparatus in which the storage medium is located to execute the steam temperature control method of any one of the above.

In order to achieve the above object, according to another aspect of the present application, there is also provided an electronic device including one or more processors and a memory for storing the one or more processors to implement the steam temperature control method according to any one of the above.

Through the application, the following steps are adopted: acquiring the current steam flow of a boiler, the current swing angle of a burner and the current flue gas temperature of an inlet of a superheater; acquiring a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting on the basis of historical steam flow of a boiler, historical swing angle of a combustor, historical flue gas temperature of a superheater inlet and historical inlet and outlet enthalpy addition of the superheater; calculating the current steam flow, the current swing angle and the current flue gas temperature according to an inlet and outlet enthalpy increase model of the superheater to obtain a first inlet and outlet enthalpy increase of the superheater; according to the first inlet and outlet enthalpy improvement row calculation, a target temperature value of the superheater inlet is obtained, and the steam temperature of the superheater inlet is controlled according to the target temperature value, so that the problem that the accuracy of controlling the steam temperature is low due to the fact that the steam temperature is regulated through a PID controller in the related art is solved. According to the scheme, the superheater inlet and outlet enthalpy gain model calculates the current steam flow of the boiler, the current swing angle of the combustor and the current flue gas temperature of the superheater inlet, then a target temperature value of the superheater inlet is obtained according to the first inlet and outlet enthalpy gain, finally the purpose of steam temperature control on the steam temperature of the superheater inlet is achieved through the target temperature value, the current boiler change can be responded quickly through the superheater inlet and outlet enthalpy gain model, the current enthalpy gain is calculated accurately, and the effect of improving the accuracy of steam temperature control is achieved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application. In the drawings:

FIG. 1 is a flow chart of a method of controlling steam temperature provided in accordance with an embodiment of the present application;

FIG. 2 is a schematic diagram of superheater inlet and outlet enthalpy gain calculation provided in accordance with an embodiment of the present application;

FIG. 3 is a schematic diagram illustrating correction of a superheater inlet and outlet enthalpy gain model provided in accordance with an embodiment of the present application;

FIG. 4 is a schematic diagram of a steam temperature control system provided in accordance with an embodiment of the present application;

FIG. 5 is a schematic illustration of a steam temperature control device provided in accordance with an embodiment of the present application;

fig. 6 is a schematic diagram of an electronic device provided according to an embodiment of the present application.

Detailed Description

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that, related information (including, but not limited to, user equipment information, user personal information, etc.) and data (including, but not limited to, data for presentation, analyzed data, etc.) related to the present disclosure are information and data authorized by a user or sufficiently authorized by each party. For example, an interface is provided between the system and the relevant user or institution, before acquiring the relevant information, the system needs to send an acquisition request to the user or institution through the interface, and acquire the relevant information after receiving the consent information fed back by the user or institution.

The invention will be described with reference to preferred embodiments, and FIG. 1 is a flow chart of a method for controlling steam temperature according to an embodiment of the present application, as shown in FIG. 1, comprising the steps of:

step S101, acquiring the current steam flow of a boiler, the current swing angle of a combustor and the current flue gas temperature of a superheater inlet.

Optionally, a current steam flow of a boiler in a steam temperature control system of the thermal power plant at a current moment, a current swing angle value of a burner and a current flue gas temperature of a superheater inlet are obtained. The steam flow rate generally refers to the flow rate of steam. The current inlet and outlet enthalpy increase of the superheater can be accurately calculated through the current steam flow, the current swing angle and the current flue gas temperature.

Step S102, obtaining a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting on the basis of historical steam flow of a boiler, historical swing angles of a combustor, historical flue gas temperatures of a superheater inlet and outlet enthalpy addition model.

Optionally, the superheater inlet and outlet enthalpy gain model is obtained through historical steam flow of the boiler, historical swing angle of the burner, historical flue gas temperature of the superheater inlet and the superheater inlet enthalpy gain fitting. The steam flow, the swing angle and the flue gas temperature can accurately model the enthalpy gain characteristics of the inlet and outlet of the superheater.

And step S103, calculating the current steam flow, the current swing angle and the current flue gas temperature according to the superheater inlet and outlet enthalpy increase model to obtain a first inlet and outlet enthalpy increase of the superheater.

Optionally, calculating the current steam flow, the current swing angle and the current flue gas temperature through a superheater inlet and outlet enthalpy increase model to obtain the first inlet and outlet enthalpy increase.

In an alternative embodiment, the superheater inlet and outlet enthalpy gain model may be shown in the following equation (1):

Δh _m ＝h(D,B _t ,f _t )(1)

wherein Δh _m The inlet and outlet enthalpy gain (kJ/kg) of the superheater is the model; d is steam flow (t/h); b (B) _t Is combustor swing angle (%); f (f) _t Is the superheater inlet flue gas temperature (deg.c).

In an alternative embodiment, the regression may be performed by some data processing means (e.g., MATLAB) to obtain a multiple pure quadratic equation, as shown in equation (2):

Δh _m ＝a ₀ +a ₁ D+a ₂ B _t +a ₃ f _t +a ₄ D ² +a ₅ B _t ² +a ₆ f _t ² (2)

wherein: a, a ₀ ，a ₁ ，a ₂ ，a ₃ ，a ₄ ，a ₅ ，a ₆ The weight coefficients of the respective items are respectively.

The first import and export enthalpy gain can be rapidly and accurately calculated through the superheater import and export enthalpy gain model.

Step S104, calculating according to the first inlet and outlet enthalpy improvement row to obtain a target temperature value of the inlet of the superheater, and taking the target temperature value as a feedforward signal to control the steam temperature of the inlet of the superheater.

Optionally, calculating by using the first inlet and outlet enthalpy gain calculated by the superheater inlet and outlet enthalpy gain model, so as to accurately obtain a target temperature value of the superheater inlet, and finally, controlling the steam temperature of the steam at the superheater inlet according to the target temperature value.

In summary, the superheater inlet and outlet enthalpy addition model calculates the current steam flow of the boiler, the current swing angle of the burner and the current flue gas temperature of the superheater inlet for the enthalpy addition of the superheater, then obtains a target temperature value of the superheater inlet according to the first inlet and outlet enthalpy addition, finally achieves the purpose of steam temperature control on the steam temperature of the superheater inlet through the target temperature value, can quickly respond to the change of the current boiler through the superheater inlet and outlet enthalpy addition model, accurately calculates the current enthalpy addition, and further achieves the effect of improving the accuracy of steam temperature control.

Optionally, in the steam temperature control method provided in the embodiment of the present application, acquiring the superheater inlet and outlet enthalpy gain model includes: acquiring historical steam flow of a boiler, historical swing angle of a combustor, historical flue gas temperature at an inlet of a superheater and historical inlet and outlet enthalpy gain of the superheater; the method comprises the steps of performing line fitting according to historical steam flow, historical swing angle, historical flue gas temperature and historical import and export enthalpy, and obtaining an initial superheater import and export enthalpy addition model; and carrying out correction treatment on the initial superheater inlet and outlet enthalpy-increasing model to obtain the superheater inlet and outlet enthalpy-increasing model.

Optionally, some historical production data of the boiler, namely, data such as historical enthalpy increase of the superheater, historical steam load of the boiler (namely, the historical steam flow), combustor swing angle (or flue baffle position), superheater inlet flue gas temperature and the like are collected, and an enthalpy increase model under data driving is built, namely, the initial superheater inlet and outlet enthalpy increase model is built. In order to improve the accuracy of calculating the enthalpy increase of the initial superheater import and export enthalpy increase model, the initial superheater import and export enthalpy increase model is subjected to correction treatment, and then the superheater import and export enthalpy increase model is obtained.

By accurately modeling the enthalpy gain characteristic of the superheater, the accuracy and stability of steam temperature control can be improved, and the temperature overshoot and deviation can be reduced.

Optionally, in the steam temperature control method provided in the embodiment of the present application, performing correction processing on an initial superheater inlet and outlet enthalpy gain model, and obtaining the superheater inlet and outlet enthalpy gain model includes: obtaining a first enthalpy of a superheater inlet and a second enthalpy of a superheater outlet; calculating according to the first enthalpy and the second enthalpy to obtain a second inlet and outlet enthalpy increase of the superheater; constructing a self-adaptive controller according to a second inlet and outlet enthalpy increase of the superheater and an initial inlet and outlet enthalpy increase model of the superheater; and carrying out correction treatment on the initial superheater inlet and outlet enthalpy-increasing model according to the self-adaptive controller to obtain the superheater inlet and outlet enthalpy-increasing model.

Obtaining a first enthalpy of a superheater inlet includes: acquiring a temperature value of water or water vapor at an inlet of the superheater; acquiring a pressure value of water or water vapor at an inlet of the superheater; and calculating according to the temperature value of the water or the water vapor and the pressure value of the water or the water vapor to obtain the first enthalpy.

Optionally, in order to improve the accuracy of calculating the enthalpy of the superheater inlet and outlet enthalpy addition model, the initial superheater inlet and outlet enthalpy addition model is subjected to correction processing through actual enthalpy addition of the superheater. Firstly, obtaining the first enthalpy of an inlet of the superheater and the second enthalpy of an outlet of the superheater, and calculating the second inlet and outlet enthalpy of the superheater according to the inlet enthalpy and the outlet enthalpy, namely obtaining the actual inlet and outlet enthalpy of the superheater. And then, constructing a self-adaptive controller by using a second import and export enthalpy increase model of the superheater and an initial import and export enthalpy increase model of the superheater, and finally, carrying out correction treatment on the import and export enthalpy increase model of the initial superheater by using the self-adaptive controller to obtain the import and export enthalpy increase model of the superheater.

In an alternative embodiment, the superheater inlet enthalpy is calculated from the temperature value of the water or steam at the superheater inlet and the pressure value of the water or steam at the superheater inlet, and the superheater outlet enthalpy is calculated from the temperature value of the water or steam at the superheater outlet and the pressure value of the water or steam at the superheater outlet.

In an alternative embodiment, the actual inlet and outlet enthalpy gain of the superheater described above may be calculated using the following equation, and the enthalpy of the superheater is calculated using equation (3).

h＝h(p,t)(3)

Wherein: h is the enthalpy of water or water vapor (kJ/kg), p is the pressure of water or water vapor (MPa), t is the temperature of water or water vapor (DEG C);

the inlet and outlet enthalpy gain of the superheater is calculated by adopting the following formula (4):

Δh＝h ₀ (p,t)-h _i (p,t)(4)

wherein: Δh is enthalpy increase (kJ/kg) of water or steam at the inlet and outlet of the superheater, h ₀ (p, t) is the enthalpy (kJ/kg) of the superheater outlet water or steam, h _i (p, t) is the enthalpy (kJ/kg) of the superheater inlet water or steam.

In an alternative embodiment, the inlet and outlet enthalpy increases of the superheater described above can be calculated using a schematic diagram as shown in FIG. 2, by superheater outlet temperature and outlet pressure and h ₀ (p, t) calculating to obtain the outlet enthalpy of the superheater, and obtaining the inlet enthalpy and the inlet pressure of the superheater and h _i (p, t) calculating to obtain the inlet enthalpy of the superheater, and finally calculating to obtain the superheat through the outlet enthalpy of the superheater and the inlet enthalpy of the superheaterThe enthalpy of the inlet and outlet of the device is increased.

In conclusion, the initial superheater import and export enthalpy addition model is corrected on line according to actual running conditions, manual intervention is not needed through mode of readjusting model parameters and the like, and accuracy of calculating enthalpy of the superheater import and export enthalpy addition model is improved.

Optionally, in the method for controlling a steam temperature provided in the embodiment of the present application, constructing the adaptive controller according to the second inlet and outlet enthalpy gain of the superheater and the initial superheater inlet and outlet enthalpy gain model includes: calculating the inlet and outlet enthalpy increment of the superheater through an initial superheater inlet and outlet enthalpy increment model to obtain a third inlet and outlet enthalpy increment; and constructing the self-adaptive controller according to the deviation between the second import and export enthalpy increase and the third import and export enthalpy increase.

Optionally, the adaptive controller is constructed as shown in equation (5):

wherein: u (t) is the output of the adaptive control; k (K) _p 、K _i And K _d Is a controller parameter; e (t) is the deviation of the model (namely the deviation between the second import and export enthalpy gain and the third import and export enthalpy gain);is the derivative of the model bias.

In an alternative embodiment, the on-line correction of the initial superheater inlet and outlet enthalpy gain model can be achieved by a schematic diagram as shown in FIG. 3, by superheater outlet temperature and outlet pressure and h ₀ (p, t) calculating to obtain the outlet enthalpy of the superheater, and obtaining the inlet enthalpy and the inlet pressure of the superheater and h _i And (p, t) calculating to obtain the inlet enthalpy of the superheater, and finally calculating to obtain the actual inlet and outlet enthalpy increase of the superheater through the outlet enthalpy of the superheater and the inlet enthalpy of the superheater. By steam flow, burner tilt angle, flue gas temperature, and h (D, B _t ,f _t ) Calculating to obtain the corresponding import and export enthalpy increase of the model, and then adding the actual import and export enthalpy increase to the modelAnd correcting the corresponding import and export enthalpy increase by the self-adaptive controller to obtain the import and export enthalpy increase of the corrected model.

And the self-adaptive controller is used for correcting the initial superheater inlet and outlet enthalpy addition model, so that the accuracy of calculating inlet and outlet enthalpy addition of the superheater inlet and outlet enthalpy addition model is improved.

Optionally, in the method for controlling a steam temperature provided in the embodiment of the present application, calculating according to the first inlet and outlet enthalpy increasing row, obtaining the target temperature value of the superheater inlet includes: acquiring a set third enthalpy of an outlet of the superheater; calculating according to the third enthalpy and the first inlet and outlet enthalpy increment to obtain fourth enthalpy of the superheater inlet; calculating according to the fourth enthalpy and the pressure value of the superheater inlet to obtain the steam entropy of the superheater inlet; and calculating according to the steam entropy to obtain a target temperature value.

Obtaining a set third enthalpy for an outlet of the superheater includes: acquiring a set steam temperature value of an outlet of the superheater; acquiring a steam pressure value of an outlet of the superheater; and calculating according to the steam temperature value and the steam pressure value to obtain the third enthalpy.

Optionally, a set steam temperature value and a set steam pressure value of an outlet of the superheater are obtained, a set third enthalpy of the outlet of the superheater is obtained through calculation by the set steam temperature value and the set steam pressure value, and then the enthalpy of the inlet of the superheater (namely the fourth enthalpy) is obtained through calculation by the third enthalpy and a first inlet-outlet enthalpy increment row calculated by a superheater inlet-outlet enthalpy increment model, namely the enthalpy of the steam at the inlet of the superheater = the enthalpy increase of the inlet of the superheater calculated by a superheater inlet-outlet enthalpy-model is obtained based on the set steam temperature and the steam pressure of the outlet of the superheater.

Then, calculating the steam entropy of the superheater inlet through the enthalpy of the steam at the superheater inlet and the pressure value of the superheater inlet, and finally, reversely pushing according to the steam entropy and the pressure to obtain the steam temperature (namely the target temperature value) of the superheater inlet.

In an alternative embodiment, the target temperature value described above may be calculated using equation (6) and equation (7):

calculating the steam entropy set by the superheater inlet according to the enthalpy and the pressure of the superheater inlet

s＝s(h,p)(6)

Wherein: h is the enthalpy (kJ/kg) of water or water vapor, p is the pressure (MPa) of water or water vapor, and s is the entropy (Kj/K) of water or water vapor.

And according to the steam entropy and the pressure set by the superheater inlet, reversely pushing to obtain the calculated steam temperature of the superheater inlet.

T＝T(s,p)(7)

The steam temperature of the inlet of the superheater can be accurately calculated through enthalpy increase of the inlet and the outlet of the superheater, and further the technical effect of accurately controlling the steam temperature of the inlet of the superheater is achieved.

Optionally, in the steam temperature control method provided in the embodiment of the present application, controlling the steam temperature of the superheater inlet according to the target temperature value includes: and taking the target temperature value as a feedforward signal, and inputting the feedforward signal into a feedforward input end of a steam temperature control system of the thermal power plant so as to perform feedforward feedback control on the steam temperature at the inlet of the superheater through the steam temperature control system of the thermal power plant, wherein the steam temperature control system of the thermal power plant is a steam temperature control system of a boiler, a burner and the superheater.

Optionally, after the steam temperature of the superheater inlet is calculated, the steam temperature of the superheater inlet is used as a feedforward signal and is introduced into a feedforward input end of the main regulator, so that feedforward feedback control is realized, namely, the steam temperature of the superheater inlet is subjected to feedforward feedback control.

According to the steam temperature control method, the current steam flow of the boiler, the current swing angle of the combustor and the current flue gas temperature of the superheater inlet are obtained; acquiring a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting on the basis of historical steam flow of a boiler, historical swing angle of a combustor, historical flue gas temperature of a superheater inlet and historical inlet and outlet enthalpy addition of the superheater; calculating the current steam flow, the current swing angle and the current flue gas temperature according to an inlet and outlet enthalpy increase model of the superheater to obtain a first inlet and outlet enthalpy increase of the superheater; according to the first inlet and outlet enthalpy improvement row calculation, a target temperature value of the superheater inlet is obtained, and the steam temperature of the superheater inlet is controlled according to the target temperature value, so that the problem that the accuracy of controlling the steam temperature is low due to the fact that the steam temperature is regulated through a PID controller in the related art is solved. According to the scheme, the superheater inlet and outlet enthalpy increase model calculates the enthalpy increase of the superheater based on the current steam flow of the boiler, the current swing angle of the combustor and the current flue gas temperature of the superheater inlet, then a target temperature value of the superheater inlet is obtained according to the first inlet and outlet enthalpy increase, finally the purpose of steam temperature control on the steam temperature of the superheater inlet is achieved through the target temperature value, the current boiler change can be responded quickly through the superheater inlet and outlet enthalpy increase model, the current enthalpy increase is calculated accurately, and the effect of improving the accuracy of steam temperature control is achieved.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is illustrated in the flowcharts, in some cases the steps illustrated or described may be performed in an order other than that illustrated herein.

The embodiment of the application also provides a steam temperature control system, as shown in fig. 4, the working principle of which is described as follows:

(1) EPID is used as a main regulator and an auxiliary regulator of the steam temperature control system respectively;

(2) STMTC is a master pre-processing module, which mainly realizes the following functions

PID control of variable parameters (VAPID), optimization control based on steam temperature rising rate, constraint technology for preventing low temperature and wall temperature from exceeding temperature, optimization control based on deviation (EBOC), multi-step advanced steam temperature control technology based on disturbance prediction, locking and tracking integration-resistant saturation technology, and optimization control based on valve characteristics (VCBOC).

The control parameters of the master control, such as the upper output limit YH, the lower output limit YL, the tracking signal TR, the tracking state TS, the increment lock LI, the visible lock LD, the proportion Kp, the integral Ti and the like, are all from a pre-processing module of the STMTC master control.

(3) DHEST2 is a preconditioning module, which mainly realizes the following functions: optimized control based on valve characteristics (VCBOC).

(4) CSTT steam enthalpy and superheater inlet temperature calculation module

(5) The QUAEQC is an enthalpy increase model of an inlet and an outlet of the superheater, the enthalpy increase of the superheater is calculated according to the load, the swing angle (flue baffle) of the burner and the temperature of the flue gas, and the model is corrected by matching with an enthalpy of CSTT steam and an inlet temperature calculation module of the superheater.

(6) The steam temperature dynamic decoupling module is designed for solving the defect of a static model (a superheater inlet and outlet enthalpy increasing model) in a dynamic process. The static model generally only considers the relationship between each variable and enthalpy increase in steady state operating conditions, and cannot accurately reflect the relationship between these changes and time in the dynamic process. Therefore, in order to more accurately predict the output variation of the model of the boiler in the dynamic process, it is necessary to use a dynamic decoupling function.

The embodiment of the application also provides a steam temperature control device, and the steam temperature control device can be used for executing the steam temperature control method provided by the embodiment of the application. The following describes a steam temperature control device provided in an embodiment of the present application.

Fig. 5 is a schematic view of a steam temperature control device according to an embodiment of the present application. As shown in fig. 5, the apparatus includes: a first acquisition unit 501, a second acquisition unit 502, a first calculation unit 503 and a second calculation unit 504.

A first obtaining unit 501, configured to obtain a current steam flow of a boiler, a current swing angle of a burner, and a current flue gas temperature of a superheater inlet;

the second obtaining unit 502 is configured to obtain a superheater inlet and outlet enthalpy addition model, where the superheater inlet and outlet enthalpy addition model is obtained by performing improved fitting based on a historical steam flow of the boiler, a historical swing angle of the burner, a historical flue gas temperature at a superheater inlet, and a historical inlet and outlet enthalpy of the superheater;

a first calculating unit 503, configured to calculate a current steam flow, a current swing angle, and a current flue gas temperature according to a superheater inlet and outlet enthalpy gain model, so as to obtain a first inlet and outlet enthalpy gain of the superheater;

the second calculating unit 504 is configured to calculate according to the first inlet and outlet enthalpy gain, obtain a target temperature value of the superheater inlet, and use the target temperature value as a feedforward signal to control the steam temperature of the superheater inlet.

According to the steam temperature control device provided by the embodiment of the application, the current steam flow of the boiler, the current swing angle of the burner and the current flue gas temperature of the superheater inlet in the steam temperature control system of the thermal power plant are obtained through the first obtaining unit 501; the second obtaining unit 502 obtains a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting based on historical steam flow of a boiler, historical swing angles of a combustor, historical flue gas temperatures of a superheater inlet and outlet enthalpy addition model; the first calculation unit 503 calculates the current steam flow, the current swing angle and the current flue gas temperature according to the superheater inlet and outlet enthalpy increase model to obtain a first inlet and outlet enthalpy increase of the superheater; the second calculating unit 504 calculates according to the first inlet and outlet enthalpy gain line to obtain a target temperature value of the superheater inlet, and uses the target temperature value as a feedforward signal to control the steam temperature of the superheater inlet, so that the problem that the accuracy of controlling the steam temperature is low due to the fact that the steam temperature is regulated by the PID controller in the related art is solved. According to the scheme, the superheater inlet and outlet enthalpy increase model calculates the enthalpy increase of the superheater based on the current steam flow of the boiler, the current swing angle of the combustor and the current flue gas temperature of the superheater inlet, then a target temperature value of the superheater inlet is obtained according to the first inlet and outlet enthalpy increase, finally the purpose of steam temperature control on the steam temperature of the superheater inlet is achieved through the target temperature value, the current boiler change can be responded quickly through the superheater inlet and outlet enthalpy increase model, the current inlet and outlet enthalpy increase is calculated accurately, and the effect of improving the accuracy of steam temperature control is achieved.

Optionally, in the steam temperature control device provided in the embodiment of the present application, the second obtaining unit includes: the first acquisition subunit is used for acquiring the historical steam flow of the boiler, the historical swing angle of the burner, the historical flue gas temperature at the inlet of the superheater and the historical inlet and outlet enthalpy increase of the superheater; the fitting subunit is used for promoting line fitting according to the historical steam flow, the historical swing angle, the historical flue gas temperature and the historical import and export enthalpy to obtain an initial superheater import and export enthalpy addition model; and the processing subunit is used for carrying out correction processing on the initial superheater inlet and outlet enthalpy addition model to obtain the superheater inlet and outlet enthalpy addition model.

Optionally, in the steam temperature control device provided in the embodiment of the present application, the processing subunit includes: a first acquisition module for acquiring a first enthalpy of an inlet of the superheater and acquiring a second enthalpy of an outlet of the superheater; the first calculation module is used for calculating according to the first enthalpy and the second enthalpy to obtain the second inlet and outlet enthalpy increase of the superheater; the construction module is used for constructing the self-adaptive controller according to the second import and export enthalpy increase of the superheater and the initial import and export enthalpy increase model of the superheater; and the processing module is used for carrying out correction processing on the initial superheater inlet and outlet enthalpy addition model according to the self-adaptive controller to obtain the superheater inlet and outlet enthalpy addition model.

Optionally, in the steam temperature control device provided in the embodiment of the present application, the first obtaining module includes: the first acquisition submodule is used for acquiring the temperature value of water or water vapor at the inlet of the superheater; the second acquisition submodule is used for acquiring the pressure value of water or water vapor at the inlet of the superheater; the first calculation sub-module is used for calculating according to the temperature value of the water or the water vapor and the pressure value of the water or the water vapor to obtain first enthalpy.

Optionally, in the steam temperature control device provided in the embodiment of the present application, the building module includes: the second calculation sub-module is used for calculating the inlet and outlet enthalpy increment of the superheater through an initial superheater inlet and outlet enthalpy increment model to obtain a third inlet and outlet enthalpy increment; and the construction submodule is used for constructing the self-adaptive controller according to the deviation between the second import and export enthalpy gain and the third import and export enthalpy gain.

Optionally, in the steam temperature control device provided in the embodiment of the present application, the second calculation unit includes: a first acquisition subunit for acquiring a set third enthalpy of an outlet of the superheater; the third calculation unit is used for performing calculation according to the third enthalpy and the first inlet and outlet enthalpy enhancement to obtain fourth enthalpy of the superheater inlet; the fourth calculation unit is used for calculating according to the fourth enthalpy and the pressure value of the superheater inlet to obtain the steam entropy of the superheater inlet; and a fifth calculation unit for calculating according to the steam entropy to obtain a target temperature value.

Optionally, in the steam temperature control device provided in the embodiment of the present application, the first obtaining subunit includes: the second acquisition module is used for acquiring a set steam temperature value of an outlet of the superheater; the third acquisition module is used for acquiring a steam pressure value of an outlet of the superheater; and the second calculation module is used for calculating according to the steam temperature value and the steam pressure value to obtain third enthalpy.

Optionally, in the steam temperature control device provided in the embodiment of the present application, the second calculation unit includes: and the input subunit is used for taking the target temperature value as a feedforward signal and inputting the feedforward signal into a feedforward input end of a steam temperature control system of the thermal power plant so as to perform feedforward feedback control on the steam temperature of the superheater inlet through the steam temperature control system of the thermal power plant, wherein the steam temperature control system of the thermal power plant is a steam temperature control system of a boiler, a burner and a superheater.

The steam temperature control device comprises a processor and a memory, wherein the first acquisition unit 501, the second acquisition unit 502, the first calculation unit 503, the second calculation unit 504 and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.

The processor includes a kernel, and the kernel fetches the corresponding program unit from the memory. The kernel can be provided with one or more than one, and the accurate control of the steam temperature of the desuperheater is realized by adjusting the parameters of the kernel.

The memory may include volatile memory, random Access Memory (RAM), and/or nonvolatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM), among other forms in computer readable media, the memory including at least one memory chip.

Embodiments of the present invention provide a computer-readable storage medium having a program stored thereon, which when executed by a processor, implements a steam temperature control method.

The embodiment of the invention provides a processor, which is used for running a program, wherein the steam temperature control method is executed when the program runs.

As shown in fig. 6, an embodiment of the present invention provides an electronic device, where the device includes a processor, a memory, and a program stored in the memory and executable on the processor, and when the processor executes the program, the following steps are implemented: acquiring the current steam flow of a boiler, the current swing angle of a burner and the current flue gas temperature of an inlet of a superheater; acquiring a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting on the basis of historical steam flow of a boiler, historical swing angle of a combustor, historical flue gas temperature of a superheater inlet and historical inlet and outlet enthalpy addition of the superheater; calculating the current steam flow, the current swing angle and the current flue gas temperature according to an inlet and outlet enthalpy increase model of the superheater to obtain a first inlet and outlet enthalpy increase of the superheater; and calculating according to the first inlet and outlet enthalpy improvement row to obtain a target temperature value of the superheater inlet, and taking the target temperature value as a feedforward signal to control the steam temperature of the superheater inlet.

Optionally, acquiring the superheater inlet and outlet enthalpy gain model includes: acquiring historical steam flow of a boiler, historical swing angle of a combustor, historical flue gas temperature at an inlet of a superheater and historical inlet and outlet enthalpy gain of the superheater; the method comprises the steps of performing line fitting according to historical steam flow, historical swing angle, historical flue gas temperature and historical import and export enthalpy, and obtaining an initial superheater import and export enthalpy addition model; and carrying out correction treatment on the initial superheater inlet and outlet enthalpy-increasing model to obtain the superheater inlet and outlet enthalpy-increasing model.

Optionally, performing correction processing on the initial superheater inlet and outlet enthalpy addition model to obtain a superheater inlet and outlet enthalpy addition model includes: obtaining a first enthalpy of an inlet of the superheater and obtaining a second enthalpy of an outlet of the superheater; calculating according to the first enthalpy and the second enthalpy to obtain a second inlet and outlet enthalpy increase of the superheater; constructing a self-adaptive controller according to a second inlet and outlet enthalpy increase of the superheater and an initial inlet and outlet enthalpy increase model of the superheater; and carrying out correction treatment on the initial superheater inlet and outlet enthalpy-increasing model according to the self-adaptive controller to obtain the superheater inlet and outlet enthalpy-increasing model.

Optionally, obtaining the first enthalpy of the superheater inlet includes: acquiring a temperature value of water or water vapor at an inlet of the superheater; acquiring a pressure value of water or water vapor at an inlet of the superheater; and calculating according to the temperature value of the water or the water vapor and the pressure value of the water or the water vapor to obtain the first enthalpy.

Optionally, constructing the adaptive controller according to the second inlet and outlet enthalpy gain of the superheater and the initial superheater inlet and outlet enthalpy gain model includes: calculating the inlet and outlet enthalpy increment of the superheater through an initial superheater inlet and outlet enthalpy increment model to obtain a third inlet and outlet enthalpy increment; and constructing the self-adaptive controller according to the deviation between the second import and export enthalpy increase and the third import and export enthalpy increase.

Optionally, calculating according to the first inlet and outlet enthalpy boost row, obtaining the target temperature value of the superheater inlet includes: acquiring a set third enthalpy of an outlet of the superheater; calculating according to the third enthalpy and the first inlet and outlet enthalpy increment to obtain fourth enthalpy of the superheater inlet; calculating according to the fourth enthalpy and the pressure value of the superheater inlet to obtain the steam entropy of the superheater inlet; and calculating according to the steam entropy to obtain a target temperature value.

Optionally, obtaining the set third enthalpy of the outlet of the superheater comprises: acquiring a set steam temperature value of an outlet of the superheater; acquiring a steam pressure value of an outlet of the superheater; and calculating according to the steam temperature value and the steam pressure value to obtain the third enthalpy.

Optionally, controlling the steam temperature of the superheater inlet in accordance with the target temperature value includes: and inputting the target temperature value to a feedforward input end of a steam temperature control system of the thermal power plant so as to perform feedforward feedback control on the steam temperature of the superheater inlet through the steam temperature control system of the thermal power plant, wherein the steam temperature control system of the thermal power plant is a steam temperature control system of a boiler, a burner and a superheater.

The device herein may be a server, PC, PAD, cell phone, etc.

The present application also provides a computer program product adapted to perform, when executed on a data processing device, a program initialized with the method steps of: acquiring the current steam flow of a boiler, the current swing angle of a burner and the current flue gas temperature of an inlet of a superheater; acquiring a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting on the basis of historical steam flow of a boiler, historical swing angle of a combustor, historical flue gas temperature of a superheater inlet and historical inlet and outlet enthalpy addition of the superheater; calculating the current steam flow, the current swing angle and the current flue gas temperature according to an inlet and outlet enthalpy increase model of the superheater to obtain a first inlet and outlet enthalpy increase of the superheater; and calculating according to the first inlet and outlet enthalpy improvement row to obtain a target temperature value of the superheater inlet, and taking the target temperature value as a feedforward signal to control the steam temperature of the superheater inlet.

Optionally, constructing the adaptive controller according to the second inlet and outlet enthalpy gain of the superheater and the initial superheater inlet and outlet enthalpy gain model includes: calculating the enthalpy of the superheater through an initial superheater inlet and outlet enthalpy adding model to obtain third enthalpy; and constructing the self-adaptive controller according to the deviation between the second import and export enthalpy increase and the third enthalpy.

Optionally, taking the target temperature value as a feed forward signal to control the steam temperature of the superheater inlet includes: and taking the target temperature value as a feedforward signal, and inputting the feedforward signal into a feedforward input end of a steam temperature control system of the thermal power plant so as to perform feedforward feedback control on the steam temperature at the inlet of the superheater through the steam temperature control system of the thermal power plant, wherein the steam temperature control system of the thermal power plant is a steam temperature control system of a boiler, a burner and the superheater.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In one typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include volatile memory in a computer-readable medium, random Access Memory (RAM) and/or nonvolatile memory, etc., such as Read Only Memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.

It should also be noted that 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 one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises an element.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.

Claims

1. A steam temperature control method, characterized by comprising:

acquiring the current steam flow of a boiler, the current swing angle of a burner and the current flue gas temperature of an inlet of a superheater;

acquiring a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting on the basis of historical steam flow of the boiler, historical swing angles of the burner, historical flue gas temperatures of a superheater inlet and historical inlet and outlet enthalpy addition of the superheater;

Calculating the current steam flow, the current swing angle and the current flue gas temperature according to the superheater inlet and outlet enthalpy gain model to obtain a first inlet and outlet enthalpy gain of the superheater;

and calculating according to the first inlet and outlet enthalpy increasing row to obtain a target temperature value of the inlet of the superheater, and taking the target temperature value as a feedforward signal to control the steam temperature of the inlet of the superheater.

2. The method of claim 1, wherein obtaining a superheater import-export enthalpy gain model comprises:

acquiring historical steam flow of the boiler, historical swing angle of the burner, historical flue gas temperature of the superheater inlet and historical inlet and outlet enthalpy gain of the superheater;

performing line fitting according to the historical steam flow, the historical swing angle, the historical flue gas temperature and the historical import and export enthalpy improvement, and obtaining an initial superheater import and export enthalpy increase model;

and carrying out correction treatment on the initial superheater inlet and outlet enthalpy-increasing model to obtain the superheater inlet and outlet enthalpy-increasing model.

3. The method of claim 2, wherein modifying the initial superheater import-export enthalpy gain model to obtain the superheater import-export enthalpy gain model comprises:

Obtaining a first enthalpy of the superheater inlet and obtaining a second enthalpy of the superheater outlet;

calculating according to the first enthalpy and the second enthalpy to obtain second inlet and outlet enthalpy increase of the superheater;

constructing a self-adaptive controller according to the second inlet and outlet enthalpy increase of the superheater and the initial superheater inlet and outlet enthalpy increase model;

and carrying out correction treatment on the initial superheater inlet and outlet enthalpy-increasing model according to the self-adaptive controller to obtain the superheater inlet and outlet enthalpy-increasing model.

4. A method according to claim 3, wherein obtaining the first enthalpy of the superheater inlet comprises:

acquiring a temperature value of water or water vapor at the inlet of the superheater;

acquiring a pressure value of water or water vapor at the inlet of the superheater;

and calculating according to the temperature value of the water or the water vapor and the pressure value of the water or the water vapor to obtain the first enthalpy.

5. The method of claim 3, wherein constructing an adaptive controller based on the second inlet and outlet enthalpy gain of the superheater and the initial superheater inlet and outlet enthalpy gain model comprises:

calculating the inlet and outlet enthalpy increment of the superheater through the initial superheater inlet and outlet enthalpy increment model to obtain a third inlet and outlet enthalpy increment;

And constructing the self-adaptive controller according to the deviation between the second import and export enthalpy increase and the third import and export enthalpy increase.

6. The method of claim 1, wherein calculating from the first inlet and outlet enthalpy boost row, obtaining a target temperature value for a superheater inlet comprises:

acquiring a set third enthalpy of the superheater outlet;

calculating according to the third enthalpy and the first inlet and outlet enthalpy increment to obtain fourth enthalpy of the superheater inlet;

calculating according to the fourth enthalpy and the pressure value of the superheater inlet to obtain the steam entropy of the superheater inlet;

and calculating according to the steam entropy and the pressure value of the superheater inlet to obtain the target temperature value.

7. The method of claim 6, wherein obtaining a set third enthalpy for the superheater outlet comprises:

acquiring a set steam temperature value of the superheater outlet;

acquiring a steam pressure value of the outlet of the superheater;

and calculating according to the steam temperature value and the steam pressure value to obtain the third enthalpy.

8. The method of claim 1, wherein using the target temperature value as a feed forward signal to control the steam temperature of the superheater inlet comprises:

And taking the target temperature value as the feedforward signal, and inputting the feedforward signal to a feedforward input end of a steam temperature control system of the thermal power plant so as to perform feedforward feedback control on the steam temperature of the superheater inlet through the steam temperature control system of the thermal power plant, wherein the steam temperature control system of the thermal power plant is the steam temperature control system of the boiler, the burner and the superheater.

9. A steam temperature control apparatus, characterized by comprising:

the first acquisition unit is used for acquiring the current steam flow of the boiler, the current swing angle of the burner and the current flue gas temperature of the superheater inlet;

the second acquisition unit is used for acquiring a superheater inlet and outlet enthalpy addition model, wherein the superheater inlet and outlet enthalpy addition model is obtained by fitting on the basis of the historical steam flow of the boiler, the historical swing angle of the burner, the historical flue gas temperature of the superheater inlet and the historical inlet and outlet enthalpy addition of the superheater;

the first calculation unit is used for calculating the current steam flow, the current swing angle and the current flue gas temperature according to the superheater inlet and outlet enthalpy increase model to obtain a first inlet and outlet enthalpy increase of the superheater;

And the second calculation unit is used for calculating according to the first inlet and outlet enthalpy improvement line to obtain a target temperature value of the superheater inlet, and taking the target temperature value as a feedforward signal to control the steam temperature of the superheater inlet.

10. A computer-readable storage medium, characterized in that the computer-readable storage medium includes a stored program, wherein the storage medium is controlled to perform the steam temperature control method according to any one of claims 1 to 8 at a device when the program is run.

11. An electronic device comprising one or more processors and a memory for storing one or more programs, wherein the one or more programs, when executed by the one or more processors, cause the one or more processors to implement the steam temperature control method of any of claims 1-8.