CN114753892A - Main steam pressure control method and device for steam turbine and electronic equipment - Google Patents
Main steam pressure control method and device for steam turbine and electronic equipment Download PDFInfo
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- CN114753892A CN114753892A CN202210417974.4A CN202210417974A CN114753892A CN 114753892 A CN114753892 A CN 114753892A CN 202210417974 A CN202210417974 A CN 202210417974A CN 114753892 A CN114753892 A CN 114753892A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/10—Final actuators
- F01D17/12—Final actuators arranged in stator parts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2270/00—Control
- F05D2270/30—Control parameters, e.g. input parameters
- F05D2270/301—Pressure
Abstract
The application provides a method, a device and electronic equipment for controlling main steam pressure of a steam turbine, wherein the method comprises the following steps: acquiring the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows; determining a linear relation between the optimal main steam pressure and the adjusting stage pressure of the steam turbine to be controlled according to the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows to obtain an optimal main steam pressure determining function of the steam turbine to be controlled; and determining the target main steam pressure of the turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the turbine to be controlled. The optimal main steam pressure determining function of the steam turbine to be controlled is obtained by determining the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage, so that the flexibility of the optimal main steam pressure determining function is improved, and a foundation is laid for improving the main steam pressure control efficiency of the steam turbine.
Description
Technical Field
The application relates to the technical field of energy conservation of steam turbines, in particular to a method and a device for controlling main steam pressure of a steam turbine and electronic equipment.
Background
Under the condition that energy constraint and economic development are more severe, open source and throttling research developed in the power industry is an effective choice for adjusting and optimizing an energy structure, and the optimization of main steam pressure of a steam turbine is one of common optimization means of the steam turbine of a power station.
In the prior art, an optimal main steam pressure matching the current electric power of the turbine is usually determined from the current electric power of the turbine based on a linear function between the optimal main steam pressure and the electric power.
However, because the optimal main steam pressure of the steam turbine is affected by multi-parameter coupling of the electrical load, the thermal load and the exhaust steam pressure, when any one of the electrical load, the thermal load or the exhaust steam pressure of the steam turbine changes, a linear function between the optimal main steam pressure and the electric power needs to be updated according to the current actual working condition, and the flexibility is low.
Disclosure of Invention
The application provides a method and a device for controlling main steam pressure of a steam turbine and electronic equipment, and aims to overcome the defects of low flexibility and the like in the prior art.
In a first aspect, the present application provides a method for controlling main steam pressure of a steam turbine, comprising:
acquiring the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
determining a linear relation between the optimal main steam pressure of the steam turbine to be controlled and the adjusting stage pressure according to the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows to obtain an optimal main steam pressure determining function of the steam turbine to be controlled;
and determining the target main steam pressure of the turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the turbine to be controlled.
Optionally, the determining, according to the regulation stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam admission flows, a linear relationship between the optimal main steam pressure of the steam turbine to be controlled and the regulation stage pressure includes:
determining a linear relation between the regulation stage pressure and the steam inlet flow according to the regulation stage pressure of the steam turbine to be controlled under different preset steam inlet flows;
determining the linear relation between the optimal main steam pressure and the steam inlet flow according to the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
and combining the linear relation between the pressure of the adjusting stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the adjusting stage.
Optionally, the method further includes:
when the nozzle group of the steam turbine to be controlled is adjusted, re-determining the linear relation between the regulating stage pressure and the steam inlet flow to obtain the latest linear relation between the regulating stage pressure and the steam inlet flow;
and combining the latest linear relation between the pressure of the regulating stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the latest linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage.
Optionally, the method further includes:
when the steam turbine to be controlled operates under the target main steam pressure and the electric load, the thermal load or the exhaust steam pressure of the steam turbine to be controlled changes, acquiring the latest regulating stage pressure of the steam turbine to be controlled;
and determining a new target main steam pressure according to the latest regulating stage pressure of the steam turbine to be controlled.
Optionally, the determining a new target main steam pressure according to the latest regulation stage pressure of the steam turbine to be controlled includes:
determining the optimal main steam pressure variation of the steam turbine to be controlled according to the adjustment stage pressure variation represented by the latest adjustment stage pressure of the steam turbine to be controlled based on the optimal main steam pressure determination function;
and determining the new target main steam pressure according to the target main steam pressure and the optimal main steam pressure variation.
Optionally, the obtaining of the optimal main steam pressure of the steam turbine to be controlled under different preset steam admission flow rates includes:
aiming at any preset steam inlet flow, acquiring various main steam pressures of the steam turbine to be controlled under the preset steam inlet flow;
detecting the high-pressure cylinder efficiency and the cycle efficiency of the steam turbine to be controlled under each main steam pressure;
and selecting the optimal main steam pressure from the various main steam pressures according to the comprehensive efficiency represented by the high-pressure cylinder efficiency and the circulation efficiency of the steam turbine to be controlled under each main steam pressure.
A second aspect of the present application provides a steam turbine main steam pressure control apparatus, comprising:
the acquisition module is used for acquiring the regulation stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
the determining module is used for determining a linear relation between the optimal main steam pressure of the steam turbine to be controlled and the adjusting stage pressure according to the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows to obtain an optimal main steam pressure determining function of the steam turbine to be controlled;
and the control module is used for determining the target main steam pressure of the steam turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the steam turbine to be controlled.
Optionally, the determining module includes:
the first determining unit is used for determining the linear relation between the regulating stage pressure and the steam inlet flow according to the regulating stage pressure of the steam turbine to be controlled under different preset steam inlet flows;
the second determining unit is used for determining the linear relation between the optimal main steam pressure and the steam inlet flow according to the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
and the third determining unit is used for combining the linear relation between the pressure of the regulating stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage.
Optionally, the apparatus further comprises:
the updating module is used for re-determining the linear relation between the regulating stage pressure and the steam inlet flow when the nozzle group of the steam turbine to be controlled is adjusted, so as to obtain the latest linear relation between the regulating stage pressure and the steam inlet flow; and combining the latest linear relation between the pressure of the regulating stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the latest linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage.
Optionally, the control module is further configured to:
when the steam turbine to be controlled operates under the target main steam pressure and the electric load, the thermal load or the exhaust steam pressure of the steam turbine to be controlled changes, acquiring the latest regulating stage pressure of the steam turbine to be controlled;
and determining a new target main steam pressure according to the latest regulating stage pressure of the steam turbine to be controlled.
Optionally, the control module is specifically configured to:
determining the optimal main steam pressure variation of the steam turbine to be controlled according to the adjustment stage pressure variation represented by the latest adjustment stage pressure of the steam turbine to be controlled based on the optimal main steam pressure determination function;
and determining the new target main steam pressure according to the target main steam pressure and the optimal main steam pressure variation.
Optionally, the obtaining module is specifically configured to:
aiming at any preset steam inlet flow, acquiring various main steam pressures of the steam turbine to be controlled under the preset steam inlet flow;
detecting the high-pressure cylinder efficiency and the cycle efficiency of the steam turbine to be controlled under each main steam pressure;
and selecting the optimal main steam pressure from the various main steam pressures according to the comprehensive efficiency represented by the high-pressure cylinder efficiency and the circulation efficiency of the steam turbine to be controlled under each main steam pressure.
A third aspect of the present application provides an electronic device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
execution of the computer-executable instructions stored by the memory by the at least one processor causes the at least one processor to perform the method as set forth in the first aspect above and in various possible designs of the first aspect.
A fourth aspect of the present application provides a computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, implement a method as set forth in the first aspect and various possible designs of the first aspect.
This application technical scheme has following advantage:
the application provides a method, a device and electronic equipment for controlling main steam pressure of a steam turbine, wherein the method comprises the following steps: acquiring the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows; determining a linear relation between the optimal main steam pressure and the adjusting stage pressure of the steam turbine to be controlled according to the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows to obtain an optimal main steam pressure determining function of the steam turbine to be controlled; and determining the target main steam pressure of the turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the turbine to be controlled. According to the method provided by the scheme, the optimal main steam pressure determining function of the steam turbine to be controlled is obtained by determining the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage, and even if the electrical load, the thermal load or the exhaust steam pressure of the steam turbine to be controlled changes, the optimal main steam pressure determining function does not need to be determined again, so that the flexibility of the optimal main steam pressure determining function is improved, and a foundation is laid for improving the main steam pressure control efficiency of the steam turbine.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to these drawings.
FIG. 1 is a schematic structural diagram of a main steam pressure control system of a steam turbine according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of a method for controlling main steam pressure of a steam turbine according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a main steam pressure control device of a steam turbine provided in an embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. The drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the following examples, "plurality" means two or more unless specifically limited otherwise.
In the prior art, an optimal main steam pressure matched with the current electric power of the turbine is determined according to the current electric power of the turbine based on a linear function between the optimal main steam pressure and the electric power. However, because the optimal main steam pressure of the steam turbine is affected by multi-parameter coupling of the electrical load, the thermal load and the exhaust steam pressure, when any one of the electrical load, the thermal load or the exhaust steam pressure of the steam turbine changes, a linear function between the optimal main steam pressure and the electric power needs to be updated according to the current actual working condition, and the flexibility is low.
In order to solve the above problems, according to the method, the device, and the electronic device for controlling main steam pressure of the steam turbine provided in the embodiment of the present application, the regulation stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inflow rates are obtained; determining a linear relation between the optimal main steam pressure and the adjusting stage pressure of the steam turbine to be controlled according to the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows to obtain an optimal main steam pressure determining function of the steam turbine to be controlled; and determining the target main steam pressure of the turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the turbine to be controlled. According to the method provided by the scheme, the optimal main steam pressure determining function of the steam turbine to be controlled is obtained by determining the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage, and even if the electrical load, the thermal load or the exhaust steam pressure of the steam turbine to be controlled changes, the optimal main steam pressure determining function does not need to be determined again, so that the flexibility of the optimal main steam pressure determining function is improved, and a foundation is laid for improving the main steam pressure control efficiency of the steam turbine.
The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, a structure of a turbine main steam pressure control system based on the present application will be explained:
the method, the device and the electronic equipment for controlling the main steam pressure of the steam turbine are suitable for determining the optimal main steam pressure of the steam turbine. As shown in fig. 1, the schematic structural diagram of a main steam pressure control system of a steam turbine according to an embodiment of the present application mainly includes a steam turbine to be controlled, a data acquisition device, and a main steam pressure control device of the steam turbine for determining an optimal main steam pressure of the steam turbine to be controlled. Specifically, the data acquisition device is used for acquiring the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows, and sending the acquired data to the main steam pressure control device of the steam turbine, and the device determines the optimal main steam pressure determining function of the steam turbine to be controlled according to the acquired data, and further realizes the optimal main steam pressure control of the steam turbine to be controlled based on the optimal main steam pressure determining function.
The embodiment of the application provides a main steam pressure control method for a steam turbine, which is used for determining the optimal main steam pressure of the steam turbine. The execution main body of the embodiment of the application is electronic equipment, such as a server, a desktop computer, a notebook computer, a tablet personal computer and other electronic equipment which can be used for realizing automatic control on the steam turbine, and can also be directly executed by a microprocessor in a power plant steam turbine set control system DCS.
As shown in fig. 2, a schematic flow chart of a method for controlling main steam pressure of a steam turbine provided in an embodiment of the present application is shown, where the method includes:
Specifically, firstly, determining the steam inlet flow of the steam turbine under the heat rate acceptance condition, marking as the THA flow, then defining 100% THA flow, 80% THA flow, 70% THA flow, 60% THA flow, 50% THA flow and 40% THA flow as preset steam inlet flow, and further acquiring the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under 100% THA flow, 80% THA flow, 70% THA flow, 60% THA flow, 50% THA flow and 40% THA flow.
It should be noted that the pressure of the regulation stage of the steam turbine is linearly related to the steam inlet flow.
Specifically, the linear relationship between the optimal main steam pressure and the adjusting stage pressure of the steam turbine to be controlled can be determined by analyzing the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows and combining the linear relationship between the adjusting stage pressure and the steam inlet flow of the steam turbine, so that the optimal main steam pressure determining function of the steam turbine to be controlled is obtained.
And step 203, determining a target main steam pressure of the turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the turbine to be controlled.
Specifically, the current regulation stage pressure of the turbine to be controlled may be obtained based on the data acquisition device, and the current regulation stage pressure is substituted into the optimal main steam pressure determination function to determine the corresponding target main steam pressure.
On the basis of the foregoing embodiment, as an implementable manner, in an embodiment, determining a linear relationship between the optimal main steam pressure and the regulation stage pressure of the steam turbine to be controlled according to the regulation stage pressure and the optimal main steam pressure of the steam turbine to be controlled at different preset steam inlet flows includes:
2021, determining a linear relation between the regulation stage pressure and the steam inlet flow according to the regulation stage pressure of the steam turbine to be controlled under different preset steam inlet flows;
step 2022, determining a linear relation between the optimal main steam pressure and the steam inlet flow according to the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
step 2023, obtaining a linear relationship between the optimal main steam pressure and the adjusting stage pressure of the steam turbine to be controlled by combining the linear relationship between the adjusting stage pressure and the steam inlet flow and the linear relationship between the optimal main steam pressure and the steam inlet flow.
Specifically, a linear function corresponding to a linear relationship between the regulation stage pressure and the steam inlet flow rate may be fitted according to the regulation stage pressure of the steam turbine to be controlled at different preset steam inlet flow rates:
p1＝mQ0+n
wherein p is1Indicating the regulated stage pressure, Q0Representing the flow of the inlet steam, and m and n are constant terms.
Further, a linear function corresponding to a linear relation between the optimal main steam pressure and the steam inlet flow rate can be fitted according to the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flow rates:
p0＝aQ0+b
wherein p is0Indicating the optimum main steam pressure, Q0Representing the steam inlet flow, and a and b are constant terms.
Specifically, an optimal main steam pressure determining function corresponding to a linear relationship between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage is obtained by fusing the two linear functions:
p0＝kp1+t
where k and t are constant terms.
Specifically, in an embodiment, when the nozzle group of the steam turbine to be controlled is adjusted, the linear relationship between the pressure of the regulation stage and the steam inlet flow rate may be re-determined, so as to obtain the latest linear relationship between the pressure of the regulation stage and the steam inlet flow rate; and combining the latest linear relation between the pressure of the regulating stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the latest linear relation between the optimal main steam pressure and the pressure of the regulating stage of the steam turbine to be controlled.
In particular, when the nozzle group of the steam turbine to be controlled is adjusted, the linear relationship between the pressure of the regulating stage and the steam admission flow changes, so that the linear relationship between the pressure of the regulating stage and the steam admission flow can be redetermined based on the above step 2021 to update the linear function p1＝mQ0+ n with m and nThe body value and, based on step 2022 above, the constant term in the optimal main steam pressure determination function is re-determined to update the optimal main steam pressure determination function.
On the basis of the foregoing embodiment, as an implementable manner, in an embodiment, the method further includes:
Specifically, the latest regulation stage pressure of the steam turbine to be controlled can be acquired based on the data acquisition device when the electrical load, the thermal load or the exhaust pressure of the steam turbine to be controlled changes
Then will be
The optimal main steam pressure determining function obtains a new target main steam pressure
Specifically, in an embodiment, in order to obtain the change of the optimal main steam pressure and the corresponding value through the change of the regulation stage pressure as soon as possible so as to improve the main steam pressure control efficiency of the steam turbine, the optimal main steam pressure change amount of the steam turbine to be controlled can be determined according to the regulation stage pressure change amount represented by the latest regulation stage pressure of the steam turbine to be controlled based on the optimal main steam pressure determination function; and determining a new target main steam pressure according to the target main steam pressure and the optimal main steam pressure variation.
Specifically, the optimum main steam pressure variation amount may be determined based on the above-described optimum main steam pressure determination function
Wherein
I.e., the amount of change in the regulator stage pressure that is characteristic of the most recent regulator stage pressure. Further, a new target main steam pressure is determined
On the basis of the foregoing embodiment, as an implementable manner, in an embodiment, obtaining an optimal main steam pressure of the steam turbine to be controlled at different preset steam inlet flows includes:
step 2011, aiming at any preset steam inflow, acquiring various main steam pressures of the steam turbine to be controlled under the preset steam inflow;
step 2012, detecting the high-pressure cylinder efficiency and the circulation efficiency of the steam turbine to be controlled under each main steam pressure;
and 2013, selecting the optimal main steam pressure from the various main steam pressures according to the comprehensive efficiency represented by the high-pressure cylinder efficiency and the circulation efficiency of the steam turbine to be controlled under each main steam pressure.
It should be noted that, at a certain steam inlet flow, if the main steam pressure rises, the efficiency of the high-pressure cylinder decreases (the heating steam extraction is generally taken from the intermediate pressure cylinder, and does not affect the high-pressure cylinder), and the cycle efficiency increases; otherwise, the efficiency of the high-pressure cylinder is improved, and the circulation efficiency is reduced. Therefore, at any steam inlet flow, the optimal main steam inlet pressure with the highest comprehensive efficiency represented by the high-pressure cylinder efficiency and the cycle efficiency exists.
Specifically, in the test process, various main steam pressures of the steam turbine to be controlled at the preset steam inlet flow rate can be tested, the high-pressure cylinder efficiency and the circulation efficiency of the steam turbine to be controlled under each main steam pressure are further detected, and finally, the optimal main steam pressure is selected from the main steam pressures and is used as the optimal main steam pressure under the preset steam inlet flow rate.
According to the method for controlling the main steam pressure of the steam turbine, the regulation stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inflow rates are obtained; determining a linear relation between the optimal main steam pressure and the adjusting stage pressure of the steam turbine to be controlled according to the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows to obtain an optimal main steam pressure determining function of the steam turbine to be controlled; and determining the target main steam pressure of the turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the turbine to be controlled. According to the method provided by the scheme, the optimal main steam pressure determining function of the steam turbine to be controlled is obtained by determining the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage, and even if the electrical load, the thermal load or the exhaust steam pressure of the steam turbine to be controlled changes, the optimal main steam pressure determining function does not need to be determined again, so that the flexibility of the optimal main steam pressure determining function is improved, and a foundation is laid for improving the main steam pressure control efficiency of the steam turbine. The method is easy to implement and easy to control and edit in thermal engineering, reduces the operation heat consumption of the power plant and enables the heat economy of the whole plant to be always in the optimal state on one hand, and is easy to edit logic control on the other hand, so that the automation level of the power plant is improved.
The embodiment of the application provides a main steam pressure control device of a steam turbine, which is used for executing the main steam pressure control method of the steam turbine provided by the embodiment.
Fig. 3 is a schematic structural diagram of a main steam pressure control device of a steam turbine according to an embodiment of the present disclosure. The steam turbine main steam pressure control device 30 includes: an acquisition module 301, a determination module 302, and a control module 303.
The system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows; the determining module is used for determining the linear relation between the optimal main steam pressure and the adjusting stage pressure of the steam turbine to be controlled according to the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows to obtain an optimal main steam pressure determining function of the steam turbine to be controlled; and the control module is used for determining the target main steam pressure of the steam turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the steam turbine to be controlled.
Specifically, in one embodiment, the determining module includes:
the first determining unit is used for determining the linear relation between the regulating stage pressure and the steam inlet flow according to the regulating stage pressure of the steam turbine to be controlled under different preset steam inlet flows;
the second determining unit is used for determining the linear relation between the optimal main steam pressure and the steam inlet flow according to the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
and the third determining unit is used for combining the linear relation between the pressure of the regulating stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage.
Specifically, in one embodiment, the apparatus further comprises:
the updating module is used for re-determining the linear relation between the regulating stage pressure and the steam inlet flow when the nozzle group of the steam turbine to be controlled is adjusted to obtain the latest linear relation between the regulating stage pressure and the steam inlet flow; and combining the latest linear relation between the pressure of the regulating stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the latest linear relation between the optimal main steam pressure and the pressure of the regulating stage of the steam turbine to be controlled.
Specifically, in an embodiment, the control module is further configured to:
when the steam turbine to be controlled operates under the target main steam pressure and the electric load, the thermal load or the steam exhaust pressure of the steam turbine to be controlled changes, acquiring the latest regulating stage pressure of the steam turbine to be controlled;
and determining a new target main steam pressure according to the latest regulating stage pressure of the steam turbine to be controlled.
Specifically, in an embodiment, the control module is specifically configured to:
determining an optimal main steam pressure variation of the steam turbine to be controlled according to the regulation stage pressure variation represented by the latest regulation stage pressure of the steam turbine to be controlled on the basis of the optimal main steam pressure determination function;
and determining a new target main steam pressure according to the target main steam pressure and the optimal main steam pressure variation.
Specifically, in an embodiment, the obtaining module is specifically configured to:
aiming at any preset steam inlet flow, acquiring various main steam pressures of the steam turbine to be controlled under the preset steam inlet flow;
detecting the high-pressure cylinder efficiency and the circulation efficiency of the steam turbine to be controlled under the pressure of each main steam;
and selecting the optimal main steam pressure from the various main steam pressures according to the comprehensive efficiency represented by the high-pressure cylinder efficiency and the circulation efficiency of the steam turbine to be controlled under each main steam pressure.
With regard to the main steam pressure control device of the steam turbine in the present embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be described in detail here.
The embodiment of the application provides a steam turbine main steam pressure control device for executing the steam turbine main steam pressure control method provided by the embodiment, and the implementation manner and the principle are the same, and are not repeated.
The embodiment of the application provides electronic equipment for executing the main steam pressure control method of the steam turbine provided by the embodiment.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application. The electronic device 40 includes: at least one processor 41 and a memory 42.
The memory stores computer execution instructions; the at least one processor executes the computer-executable instructions stored in the memory to cause the at least one processor to perform the method for turbine main steam pressure control as provided in the above embodiments.
The electronic device provided by the embodiment of the application is used for executing the main steam pressure control method of the steam turbine provided by the embodiment, the implementation mode and the principle of the electronic device are the same, and repeated description is omitted.
The embodiment of the application provides a computer-readable storage medium, wherein a computer executing instruction is stored in the computer-readable storage medium, and when a processor executes the computer executing instruction, the method for controlling main steam pressure of a steam turbine provided by any one of the above embodiments is implemented.
The storage medium containing the computer executable instructions according to the embodiment of the present application may be used to store the computer executable instructions of the steam turbine main steam pressure control method provided in the foregoing embodiment, and the implementation manner and the principle thereof are the same and are not described again.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
It is obvious to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to perform all or part of the above described functions. For the specific working process of the device described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A method for controlling the main steam pressure of a steam turbine is characterized by comprising the following steps:
acquiring the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
determining a linear relation between the optimal main steam pressure of the steam turbine to be controlled and the adjusting stage pressure according to the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows to obtain an optimal main steam pressure determining function of the steam turbine to be controlled;
and determining the target main steam pressure of the turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the turbine to be controlled.
2. The method according to claim 1, wherein the determining a linear relationship between the optimal main steam pressure of the turbine to be controlled and the pressure of the regulation stage according to the pressure of the regulation stage and the optimal main steam pressure of the turbine to be controlled at different preset steam inlet flows comprises:
determining a linear relation between the regulation stage pressure and the steam inlet flow according to the regulation stage pressure of the steam turbine to be controlled under different preset steam inlet flows;
determining the linear relation between the optimal main steam pressure and the steam inlet flow according to the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
and combining the linear relation between the pressure of the adjusting stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the adjusting stage.
3. The method of claim 2, further comprising:
when the nozzle group of the steam turbine to be controlled is adjusted, re-determining the linear relation between the regulating stage pressure and the steam inlet flow to obtain the latest linear relation between the regulating stage pressure and the steam inlet flow;
and combining the latest linear relation between the pressure of the regulating stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the latest linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the regulating stage.
4. The method of claim 1, further comprising:
when the steam turbine to be controlled operates under the target main steam pressure and the electric load, the thermal load or the exhaust steam pressure of the steam turbine to be controlled changes, acquiring the latest regulating stage pressure of the steam turbine to be controlled;
and determining a new target main steam pressure according to the latest regulating stage pressure of the steam turbine to be controlled.
5. The method according to claim 4, wherein said determining a new target main steam pressure based on the latest regulated stage pressure of the steam turbine to be controlled comprises:
determining the optimal main steam pressure variation of the steam turbine to be controlled according to the adjustment stage pressure variation represented by the latest adjustment stage pressure of the steam turbine to be controlled based on the optimal main steam pressure determination function;
and determining the new target main steam pressure according to the target main steam pressure and the optimal main steam pressure variation.
6. The method according to claim 1, wherein the obtaining of the optimal main steam pressure of the steam turbine to be controlled at different preset steam inlet flows comprises:
aiming at any preset steam inlet flow, acquiring various main steam pressures of the steam turbine to be controlled under the preset steam inlet flow;
detecting the high-pressure cylinder efficiency and the cycle efficiency of the steam turbine to be controlled under each main steam pressure;
and selecting the optimal main steam pressure from the various main steam pressures according to the comprehensive efficiency represented by the high-pressure cylinder efficiency and the circulation efficiency of the steam turbine to be controlled under each main steam pressure.
7. A main steam pressure control device of a steam turbine, comprising:
the acquisition module is used for acquiring the regulation stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
the determining module is used for determining a linear relation between the optimal main steam pressure of the steam turbine to be controlled and the adjusting stage pressure according to the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows to obtain an optimal main steam pressure determining function of the steam turbine to be controlled;
and the control module is used for determining the target main steam pressure of the steam turbine to be controlled under the current regulation stage pressure based on the optimal main steam pressure determination function of the steam turbine to be controlled.
8. The apparatus of claim 7, wherein the determining module comprises:
the first determining unit is used for determining the linear relation between the regulating stage pressure and the steam inlet flow according to the regulating stage pressure of the steam turbine to be controlled under different preset steam inlet flows;
the second determining unit is used for determining the linear relation between the optimal main steam pressure and the steam inlet flow according to the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows;
and the third determining unit is used for combining the linear relation between the pressure of the adjusting stage and the steam inlet flow and the linear relation between the optimal main steam pressure and the steam inlet flow to obtain the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the pressure of the adjusting stage.
9. An electronic device, comprising: at least one processor and a memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method of any of claims 1-6.
10. A computer-readable storage medium having stored thereon computer-executable instructions which, when executed by a processor, implement the method of any one of claims 1 to 6.
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| CN202210417974.4A CN114753892B (en) | 2022-04-20 | 2022-04-20 | Method and device for controlling main steam pressure of steam turbine and electronic equipment |
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