CN114753892B - Method and device for controlling main steam pressure of steam turbine and electronic equipment - Google Patents
Method and device for controlling main steam pressure of steam turbine and electronic equipment Download PDFInfo
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- CN114753892B CN114753892B CN202210417974.4A CN202210417974A CN114753892B CN 114753892 B CN114753892 B CN 114753892B CN 202210417974 A CN202210417974 A CN 202210417974A CN 114753892 B CN114753892 B CN 114753892B
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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
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Abstract
The application provides a method and a device for controlling main steam pressure of a steam turbine and electronic equipment, wherein the method comprises the following steps: acquiring the regulating stage pressure and the optimal main steam pressure of a steam turbine to be controlled under different preset steam inlet flows; according to the regulating stage pressure and the optimal main steam 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 regulating stage pressure of the steam turbine to be controlled, and obtaining an optimal main steam pressure determining function of the steam turbine to be controlled; and determining the target main steam pressure of the steam turbine to be controlled under the current regulating stage pressure based on the optimal main steam pressure determining function of the steam turbine to be controlled. The linear relation between the optimal main steam pressure and the regulating stage pressure of the steam turbine to be controlled is determined, so that the optimal main steam pressure determining function of the steam turbine to be controlled is obtained, 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 throttle research developed in the power industry is an effective choice for adjusting and optimizing energy structures, and optimizing the main steam pressure of a steam turbine is one of the common optimization means of a power station steam turbine.
In the prior art, the optimal main steam pressure matching the current electric power is typically determined from the current electric power of the steam 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 influenced by multi-parameter coupling of the electric load, the heat load and the exhaust steam pressure, when any parameter of the electric load, the heat load or the exhaust steam pressure of the steam turbine changes, the 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.
A first aspect of the present application provides a method for controlling main steam pressure of a steam turbine, including:
acquiring the regulating stage pressure and the optimal main steam pressure of a steam turbine to be controlled under different preset steam inlet flows;
according to the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows, determining the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the regulating stage pressure, and obtaining an optimal main steam pressure determining function of the steam turbine to be controlled;
and determining the target main steam pressure of the steam turbine to be controlled under the current regulating stage pressure based on the optimal main steam pressure determining function of the steam turbine to be controlled.
Optionally, the determining, according to the adjusting stage pressure and the optimal main steam pressure of the turbine to be controlled under different preset inlet steam flows, a linear relationship between the optimal main steam pressure of the turbine to be controlled and the adjusting stage pressure includes:
determining a 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;
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;
and combining the linear relation between the regulating stage pressure 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 and the regulating stage pressure of the steam turbine to be controlled.
Optionally, the method further comprises:
when the nozzle group of the steam turbine to be controlled is adjusted, the linear relation between the pressure of the regulating stage and the steam inlet flow is redetermined, and the latest linear relation between the pressure of the regulating stage and the steam inlet flow is obtained;
and combining the latest linear relation between the regulating stage pressure 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 regulating stage pressure.
Optionally, the method further comprises:
when the to-be-controlled steam turbine operates under the target main steam pressure and the electric load, the thermal load or the exhaust steam pressure of the to-be-controlled steam turbine changes, the latest regulating stage pressure of the to-be-controlled steam turbine is obtained;
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 regulating 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 regulating stage pressure variation represented by the latest regulating stage pressure of the steam turbine to be controlled based on the optimal main steam pressure determining 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 the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows 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 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 plurality of 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 main steam pressure control device for a steam turbine, comprising:
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 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, so as 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 determining 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 flow;
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 regulating stage pressure 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 and the regulating stage pressure of the steam turbine to be controlled.
Optionally, the apparatus further includes:
the updating module is used for redefining the linear relation between the regulating stage pressure and the steam inlet flow rate 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 rate; and combining the latest linear relation between the regulating stage pressure 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 regulating stage pressure.
Optionally, the control module is further configured to:
when the to-be-controlled steam turbine operates under the target main steam pressure and the electric load, the thermal load or the exhaust steam pressure of the to-be-controlled steam turbine changes, the latest regulating stage pressure of the to-be-controlled steam turbine is obtained;
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 regulating stage pressure variation represented by the latest regulating stage pressure of the steam turbine to be controlled based on the optimal main steam pressure determining 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 acquiring 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 plurality of 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, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executes the computer-executable instructions stored by the memory such that the at least one processor performs the method as described above in the first aspect and the various possible designs of the first aspect.
A fourth aspect of the present application provides a computer-readable storage medium having stored therein computer-executable instructions which, when executed by a processor, implement the method as described above in the first aspect and the various possible designs of the first aspect.
The technical scheme of the application has the following advantages:
the application provides a method and a device for controlling main steam pressure of a steam turbine and electronic equipment, wherein the method comprises the following steps: acquiring the regulating stage pressure and the optimal main steam pressure of a steam turbine to be controlled under different preset steam inlet flows; according to the regulating stage pressure and the optimal main steam 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 regulating stage pressure of the steam turbine to be controlled, and obtaining an optimal main steam pressure determining function of the steam turbine to be controlled; and determining the target main steam pressure of the steam turbine to be controlled under the current regulating stage pressure based on the optimal main steam pressure determining function of the steam turbine to be controlled. According to the method provided by the scheme, the linear relation between the optimal main steam pressure and the regulating stage pressure of the steam turbine to be controlled is determined, so that the optimal main steam pressure determining function of the steam turbine to be controlled is obtained, and even if the electric 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, a brief description will be given below of the drawings required for the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.
FIG. 1 is a schematic structural diagram of a turbine main steam pressure control system 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 view of a main steam pressure control device of a steam turbine according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the disclosed concepts in any way, but to illustrate the concepts of the present application to those skilled in the art with reference to the specific embodiments.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of 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 apparent that the described embodiments are some embodiments of the present application, but 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, are intended to be within the scope of the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the following description of the embodiments, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the prior art, the optimal main steam pressure matching the current electric power is determined from the current electric power of the steam turbine, typically 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 influenced by multi-parameter coupling of the electric load, the heat load and the exhaust steam pressure, when any parameter of the electric load, the heat load or the exhaust steam pressure of the steam turbine changes, the 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.
Aiming at the problems, the method, the device and the electronic equipment for controlling the main steam pressure of the steam turbine are provided, and the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows are obtained; according to the regulating stage pressure and the optimal main steam 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 regulating stage pressure of the steam turbine to be controlled, and obtaining an optimal main steam pressure determining function of the steam turbine to be controlled; and determining the target main steam pressure of the steam turbine to be controlled under the current regulating stage pressure based on the optimal main steam pressure determining function of the steam turbine to be controlled. According to the method provided by the scheme, the linear relation between the optimal main steam pressure and the regulating stage pressure of the steam turbine to be controlled is determined, so that the optimal main steam pressure determining function of the steam turbine to be controlled is obtained, and even if the electric 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 embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. Embodiments of the present invention will be described below with reference to the accompanying drawings.
First, a structure of a main steam pressure control system of a steam turbine according to the present application will be described:
the method and the device for controlling the main steam pressure of the steam turbine and the electronic equipment are suitable for determining the optimal main steam pressure of the steam turbine. 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, which 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. 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 transmitting acquired data to the main steam pressure control device of the steam turbine.
The embodiment of the application provides a main steam pressure control method of 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 computer and other electronic equipment which can be used for realizing automatic control of the steam turbine, and can also be directly executed by a microprocessor in a control system DCS of the power plant steam turbine unit.
As shown in fig. 2, a flow chart of a method for controlling main steam pressure of a steam turbine according to an embodiment of the present application is shown, where the method includes:
step 201, obtaining the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows.
Specifically, firstly, determining the inlet steam flow of the steam turbine to be controlled under the heat rate acceptance working condition, recording as THA flow, and then defining 100% THA flow, 80% THA flow, 70% THA flow, 60% THA flow, 50% THA flow and 40% THA flow as preset inlet steam flow, so as to obtain the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under the conditions of 100% THA flow, 80% THA flow, 70% THA flow, 60% THA flow, 50% THA flow and 40% THA flow.
Step 202, 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, and obtaining an optimal main steam pressure determining function of the steam turbine to be controlled.
The regulating stage pressure of the steam turbine is in linear relation with the inlet steam flow.
Specifically, the linear relation 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 relation 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.
Step 203, determining the target main steam pressure of the steam turbine to be controlled under the current regulating stage pressure based on the optimal main steam pressure determining function of the steam turbine to be controlled.
Specifically, the current regulation stage pressure of the steam turbine to be controlled can be obtained based on the data acquisition device, and the current regulation stage pressure is substituted into the optimal main steam pressure determining function to determine the corresponding target main steam pressure.
On the basis of the above embodiment, as an implementation manner, in an embodiment, according to the adjusting stage pressure and the optimal main steam pressure of the turbine to be controlled under different preset inlet steam flows, determining the linear relationship between the optimal main steam pressure and the adjusting stage pressure of the turbine to be controlled includes:
step 2021, determining a linear relationship 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;
step 2022, determining a linear relationship 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, combining the linear relationship between the regulating stage pressure and the steam inlet flow and the linear relationship between the optimal main steam pressure and the steam inlet flow, to obtain the linear relationship between the optimal main steam pressure and the regulating stage pressure of the steam turbine to be controlled.
Specifically, according to the regulating stage pressure of the steam turbine to be controlled under different preset steam inflow rates, a linear function corresponding to the linear relation between the regulating stage pressure and the steam inflow rate can be fitted:
p 1 ＝Q 0 +
wherein p is 1 Represents the regulating stage pressure, Q 0 And represents the steam inlet flow, and m and n are constant items.
Further, according to the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows, a linear function corresponding to the linear relation between the optimal main steam pressure and the steam inlet flows can be fitted:
p 0 ＝Q 0 +
wherein p is 0 Represents the optimal main vapor pressure, Q 0 And the inlet flow is represented, and a and b are constant items.
Specifically, by combining the two linear functions, an optimal main steam pressure determining function corresponding to the linear relation between the optimal main steam pressure and the regulating stage pressure of the steam turbine to be controlled is obtained:
p 0 ＝p 1 +
where k and t are constant terms.
Specifically, in an embodiment, when the nozzle set of the steam turbine to be controlled is adjusted, the linear relationship between the regulating stage pressure and the steam inlet flow rate can be redetermined, so as to obtain the latest linear relationship between the regulating stage pressure and the steam inlet flow rate; and combining the latest linear relation between the regulating stage pressure 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 regulating stage pressure of the steam turbine to be controlled.
Specifically, when the nozzle group of the turbine to be controlled is adjusted, the linear relationship between the regulating stage pressure and the inlet steam flow will change, so that the linear relationship between the regulating stage pressure and the inlet steam flow can be redetermined based on the step 2021 to update the linear function p 1 ＝Q 0 Specific values of m and n in + and based on step 2022 described above, the constant terms in the optimal main steam pressure determination function are redetermined to update the optimal main steam pressure determination function.
On the basis of the above embodiment, as a practical implementation, in an embodiment, the method further includes:
step 301, when the turbine to be controlled operates under the target main steam pressure and the electric load, the heat load or the exhaust steam pressure of the turbine to be controlled changes, acquiring the latest regulating stage pressure of the turbine to be controlled;
step 302, determining a new target main steam pressure according to the latest regulating stage pressure of the steam turbine to be controlled.
Specifically, when the electric load, the thermal load or the exhaust pressure of the turbine to be controlled changes, the latest regulating stage pressure of the turbine to be controlled can be acquired based on the data acquisition deviceThen will->The optimal main steam pressure determining function obtains 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 regulating 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 of the steam turbine to be controlled may be determined according to the regulating stage pressure change represented by the latest regulating stage pressure of the steam turbine to be controlled based on an optimal main steam pressure determining 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 functionWherein->The pressure change of the regulating stage, which is characterized by the latest regulating stage pressure, is obtained. Further, a new target main steam pressure +.>
On the basis of the above embodiment, as an implementation manner, in an embodiment, obtaining the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows includes:
step 2011, obtaining multiple main steam pressures of a steam turbine to be controlled under the preset steam inlet flow according to any preset steam inlet flow;
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 step 2013, selecting the optimal main steam pressure from a plurality of 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.
Under a certain steam inlet flow, if the main steam pressure is increased, the efficiency of the high-pressure cylinder is reduced (heating steam extraction is generally taken from the medium-pressure cylinder and does not affect the high-pressure cylinder), and the circulation efficiency is improved; otherwise, the efficiency of the high-pressure cylinder is improved, and the circulation efficiency is reduced. Therefore, under any steam inlet flow, the optimal main pressure of the steam inlet with highest comprehensive efficiency, which is characterized by high-pressure cylinder efficiency and circulation efficiency, exists.
Specifically, in the test process, various main steam pressures of the steam turbine to be controlled at preset steam inlet flow can be tested, so that the high-pressure cylinder efficiency and the circulation efficiency of the steam turbine to be controlled under each main steam pressure are 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.
According to the method for controlling the main steam pressure of the steam turbine, the adjusting stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows are obtained; according to the regulating stage pressure and the optimal main steam 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 regulating stage pressure of the steam turbine to be controlled, and obtaining an optimal main steam pressure determining function of the steam turbine to be controlled; and determining the target main steam pressure of the steam turbine to be controlled under the current regulating stage pressure based on the optimal main steam pressure determining function of the steam turbine to be controlled. According to the method provided by the scheme, the linear relation between the optimal main steam pressure and the regulating stage pressure of the steam turbine to be controlled is determined, so that the optimal main steam pressure determining function of the steam turbine to be controlled is obtained, and even if the electric 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, on one hand, the operation heat consumption of the power plant is reduced, the heat economy of the whole plant is always in an optimal state, on the other hand, the logic control is easy to edit, and 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.
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 application. The 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 a 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, and obtaining 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 determining function of the steam turbine to be controlled.
Specifically, in an 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 flow;
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 regulating stage pressure 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 and the regulating stage pressure of the steam turbine to be controlled.
Specifically, in an embodiment, the apparatus further comprises:
the updating module is used for determining the linear relation between the regulating stage pressure and the steam inlet flow again 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 regulating stage pressure 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 regulating stage pressure of the steam turbine to be controlled.
Specifically, in an embodiment, the control module is further configured to:
when the to-be-controlled turbine operates under the target main steam pressure and the electric load, the heat load or the exhaust steam pressure of the to-be-controlled turbine changes, the latest regulating stage pressure of the to-be-controlled turbine is obtained;
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 the optimal main steam pressure variation of the steam turbine to be controlled according to the regulating stage pressure variation represented by the latest regulating stage pressure of the steam turbine to be controlled based on the optimal main steam pressure determining 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 a plurality of 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.
The specific manner in which the respective modules perform the operations in relation to the main steam pressure control device of the steam turbine in the present embodiment has been described in detail in the embodiments concerning the method, and will not be explained in detail here.
The main steam pressure control device of the steam turbine provided in the embodiment of the present application is configured to execute the main steam pressure control method of the steam turbine provided in the foregoing embodiment, and its implementation manner is the same as the principle, and is not repeated.
The embodiment of the application provides an electronic device for executing the main steam pressure control method of the steam turbine.
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-executable instructions; the at least one processor executes the computer-executable instructions stored in the memory, so that the at least one processor executes the main steam pressure control method of the steam turbine as provided in the above embodiment.
The embodiment of the application provides an electronic device, which is configured to execute the method for controlling the main steam pressure of the steam turbine provided in the embodiment, and its implementation manner and principle are the same and are not repeated.
The embodiment of the application provides a computer readable storage medium, wherein computer execution instructions are stored in the computer readable storage medium, and when a processor executes the computer execution instructions, the method for controlling the main steam pressure of the steam turbine provided by any embodiment is realized.
The storage medium containing computer executable instructions in the embodiments of the present application may be used to store the computer executable instructions of the main steam pressure control method of the steam turbine provided in the foregoing embodiments, and the implementation manner and principle of the computer executable instructions are the same and are not repeated.
In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown 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 may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to perform all or part of the functions described above. The specific working process of the above-described device may refer 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 for illustrating the technical solution 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (8)
1. A method of controlling main steam pressure in a steam turbine, comprising:
acquiring the regulating stage pressure and the optimal main steam pressure of a steam turbine to be controlled under different preset steam inlet flows;
according to the regulating stage pressure and the optimal main steam pressure of the steam turbine to be controlled under different preset steam inlet flows, determining the linear relation between the optimal main steam pressure of the steam turbine to be controlled and the regulating stage pressure, and obtaining an optimal main steam pressure determining function of the steam turbine to be controlled;
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 determining function of the steam turbine to be controlled;
the determining the linear relation between the optimal main steam pressure of the turbine to be controlled and the adjusting stage pressure according to the adjusting stage pressure and the optimal main steam pressure of the turbine to be controlled under different preset steam inlet flows comprises the following steps:
determining a 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;
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;
combining the linear relation between the regulating stage pressure 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 and the regulating stage pressure of the steam turbine to be controlled;
the optimal main steam pressure determining function of the steam turbine to be controlled is as follows:
p 0 ＝p 1 +
wherein p is 0 Indicating the optimum main vapour pressure, p 1 Represents the regulating stage pressure, p 1 ＝Q 0 +，Q 0 Representing the inlet flow, m, n, k and t are constant terms.
2. The method as recited in claim 1, further comprising:
when the nozzle group of the steam turbine to be controlled is adjusted, the linear relation between the pressure of the regulating stage and the steam inlet flow is redetermined, and the latest linear relation between the pressure of the regulating stage and the steam inlet flow is obtained;
and combining the latest linear relation between the regulating stage pressure 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 regulating stage pressure.
3. The method as recited in claim 1, further comprising:
when the to-be-controlled steam turbine operates under the target main steam pressure and the electric load, the thermal load or the exhaust steam pressure of the to-be-controlled steam turbine changes, the latest regulating stage pressure of the to-be-controlled steam turbine is obtained;
and determining a new target main steam pressure according to the latest regulating stage pressure of the steam turbine to be controlled.
4. A method according to claim 3, wherein said determining a new target main steam pressure based on the latest regulation stage pressure of said turbine to be controlled comprises:
determining the optimal main steam pressure variation of the steam turbine to be controlled according to the regulating stage pressure variation represented by the latest regulating stage pressure of the steam turbine to be controlled based on the optimal main steam pressure determining function;
and determining the new target main steam pressure according to the target main steam pressure and the optimal main steam pressure variation.
5. The method according to claim 1, wherein the obtaining the optimal main steam pressure of the steam turbine to be controlled at different preset inlet steam 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 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 plurality of 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.
6. A main steam pressure control device for a steam turbine, comprising:
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 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, so as to obtain an optimal main steam pressure determining function of the steam turbine to be controlled;
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 determining function of the steam turbine to be controlled;
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 flow;
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;
the third determining unit is used for combining the linear relation between the regulating stage pressure 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 and the regulating stage pressure of the steam turbine to be controlled;
the optimal main steam pressure determining function of the steam turbine to be controlled is as follows:
p 0 ＝p 1 +
wherein p is 0 Indicating the optimum main vapour pressure, p 1 Represents the regulating stage pressure, p 1 ＝Q 0 +，Q 0 Representing the inlet flow, m, n, k and t are constant terms.
7. An electronic device, comprising: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing computer-executable instructions stored in the memory causes the at least one processor to perform the method of any one of claims 1 to 5.
8. A computer readable storage medium having stored therein computer executable instructions which when executed by a processor implement the method of any one of claims 1 to 5.
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| SU1087676A1 (en) * | 1983-02-04 | 1984-04-23 | Предприятие "Донтехэнерго" Производственного Объединения По Наладке,Совершенствованию Технологии И Эксплуатации Электростанций И Сетей "Союзтехэнерго" | System for adjusting steam pressure in power unit |
| JP2007046504A (en) * | 2005-08-08 | 2007-02-22 | Hitachi Ltd | Steam turbine control system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201330622Y (en) * | 2008-12-31 | 2009-10-21 | 山东齐鲁电机制造有限公司 | High-pressure fuel oil resistant full electronic tuning system for steam turbine |
| CN110318824B (en) * | 2019-07-05 | 2021-09-24 | 山东中实易通集团有限公司 | Backpressure correction function setting method and system related to steam turbine valve management |
| CN110705042A (en) * | 2019-09-12 | 2020-01-17 | 国网湖南省电力有限公司 | Steam turbine valve flow characteristic identification method, system and medium based on T-S fuzzy model |
| CN112523816B (en) * | 2020-11-27 | 2022-04-19 | 广西电网有限责任公司电力科学研究院 | Steam turbine steam distribution function curve optimization control method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1087676A1 (en) * | 1983-02-04 | 1984-04-23 | Предприятие "Донтехэнерго" Производственного Объединения По Наладке,Совершенствованию Технологии И Эксплуатации Электростанций И Сетей "Союзтехэнерго" | System for adjusting steam pressure in power unit |
| JP2007046504A (en) * | 2005-08-08 | 2007-02-22 | Hitachi Ltd | Steam turbine control system |
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