A method and apparatus for establishing a steam turbine model

Abstract

This invention provides a method and apparatus for establishing a steam turbine model. The method includes: determining a reference state of the steam turbine based on preset steam turbine unit parameter values; determining multiple integrated valve positions and multiple unit powers during the process of the steam turbine transitioning from multiple states to the reference state; and establishing a steam turbine model based on the multiple integrated valve positions and multiple unit powers. This invention obtains the functional relationship between the integrated valve positions and unit power during load increases and decreases by conducting flow characteristic tests on the unit, and integrates this function into the original steam turbine model. In this process, the influence of main steam pressure is considered to obtain a new model. This model considers the actual flow characteristics of the unit and the influence of main steam pressure on the steam turbine's steam intake, thus having wider adaptability and improving model accuracy and the accuracy of power system stability analysis.

Description

Technical Field

[0001] This invention relates to the field of power system simulation modeling and simulation technology, specifically to a method and apparatus for establishing a steam turbine model. Background Technology

[0002] In recent years, with the development of power systems, the scale of power grids has continued to expand. The importance of power grid safety and stable operation has become increasingly prominent. Power grid stability analysis plays a crucial role in studying the safety of power grid operation, simulating dynamic changes in the power grid under fault conditions, and ensuring the safe and stable operation of the power grid. Therefore, in recent years, relevant technical personnel have extensively carried out the establishment and parameter acquisition of generator, excitation system, speed control system, and load models. Steam turbine generator sets, as the mainstay of the power market, occupy a vital position in the entire power system, and the performance and dynamic characteristics of steam turbines and their regulating systems play an important role in regulating the frequency of the entire power grid, responding promptly to changes in power grid load, and ensuring power grid safety.

[0003] In recent years, the installed capacity and power generation of new energy grid-connected power plants have been increasing. However, the randomness and uncertainty of new energy power generation have made the characteristics of the power grid increasingly complex. The varied operating modes have brought difficulties to the frequency regulation and control of the power grid. At present, thermal power units are still the main source of power grid frequency regulation. In addition, in order to absorb new energy power generation, coal-fired power units have been undergoing flexibility transformation and participating in the deep peak shaving market. The current standard recommended turbine and its speed regulation system model has simplified the flow characteristics of the unit. However, this process ignores the fact that the turbine and its regulation system is a complex nonlinear system. In the wide load range of the unit, especially when comparing typical operating conditions and deep peak shaving conditions, the inadequacy of the existing turbine model under different loads is more prominent. There is an urgent need to establish a more refined model that can reflect the actual operating characteristics of the unit and has wider adaptability. Summary of the Invention

[0004] The turbine model establishment method and apparatus provided by this invention take into account the influence of the actual flow characteristics of the unit and the main steam pressure on the turbine steam inlet, thereby making it more adaptable and improving the model accuracy and the accuracy of power system stability analysis.

[0005] To achieve the above objectives, firstly, this invention provides a method for establishing a steam turbine model, including: The reference state of the steam turbine is determined based on the preset steam turbine unit parameter values; Determine the combined valve positions and power of multiple units during the process of the steam turbine transitioning from multiple states to the reference state; A turbine model was established based on the combined valve positions and power of multiple units.

[0006] In one embodiment, the reference state includes: the main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature corresponding to when the unit power reaches the rated power.

[0007] In one embodiment, determining the combined valve positions and power of multiple units during the process of the steam turbine transitioning from multiple states to the reference state includes: The integrated valve position of the unit is changed multiple times to generate the multiple states; Record the integrated valve position of the turbine unit and the power of multiple units when the turbine recovers from the multiple states to the reference state.

[0008] In one embodiment, establishing a turbine model based on the combined valve positions and power of multiple units includes: Based on the integrated valve positions and power of multiple units, turbine models are established for the turbine during load increase and load decrease processes, wherein the integrated valve positions of the units correspond one-to-one with the power of the units.

[0009] Secondly, the present invention provides a steam turbine model building device, the device comprising: The reference state determination module is used to determine the reference state of the steam turbine based on preset steam turbine unit parameter values; The valve position determination module is used to determine the combined valve positions and power of multiple units during the process of the steam turbine transitioning from multiple states to the reference state. The model building module is used to build a steam turbine model based on the combined valve positions and power of multiple units.

[0010] In one embodiment, the reference state includes: the main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature corresponding to when the unit power reaches the rated power.

[0011] In one embodiment, the valve position determination module includes: A state generation unit is used to change the integrated valve position of the unit multiple times to generate the multiple states; The data recording unit is used to record the integrated valve position of the turbine unit and the power of the multiple units when the turbine recovers from the multiple states to the reference state.

[0012] In one embodiment, the model building module includes: The model building unit is used to build turbine models of the turbine during load increase and load decrease processes based on the integrated valve positions and power of multiple units, wherein the integrated valve positions of the units correspond one-to-one with the power of the units.

[0013] Thirdly, the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of a method for establishing a steam turbine model.

[0014] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of a method for establishing a steam turbine model.

[0015] As described above, the turbine model establishment method and apparatus provided in this embodiment of the invention include: firstly, determining the reference state of the turbine based on preset turbine unit parameter values; then, determining multiple integrated valve positions and multiple unit powers during the process of the turbine transitioning from multiple states to the reference state; and finally, establishing a turbine model based on the multiple integrated valve positions and multiple unit powers. This invention obtains the functional relationship between the integrated valve position and unit power during load increase and decrease by conducting flow characteristic tests on the unit, and integrates this function into the original turbine model. In this process, the influence of main steam pressure is considered to obtain a new model. This model considers the actual flow characteristics of the unit and the influence of main steam pressure on the turbine's steam inlet flow, thus having wider adaptability and improving model accuracy and the accuracy of power system stability analysis. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart illustrating the method for establishing a steam turbine model provided in an embodiment of the present invention; Figure 2 This is a flowchart illustrating step 200 of the turbine model creation method in an embodiment of the present invention; Figure 3 This is a flowchart illustrating step 300 of the turbine model creation method in an embodiment of the present invention; Figure 4 This is a flowchart illustrating the method for establishing a steam turbine model in a specific application example of the present invention; Figure 5 This is a block diagram of the turbine model establishment method in a specific application example of the present invention; Figure 6 A block diagram of existing methods for establishing steam turbine models; Figure 7This is a comparative diagram of the load response process in a specific application example of the present invention; Figure 8 This is a comparative schematic diagram of the integrated valve position command response process in a specific application example of the present invention; Figure 9 This is a schematic diagram of the turbine model building device in an embodiment of the present invention; Figure 10 This is a schematic diagram of the valve position determination module 20 in an embodiment of the present invention; Figure 11 This is a schematic diagram of the structure of the model building module 30 in an embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0020] It should be noted that the terms "comprising" and "having" and any variations thereof in the specification, claims and accompanying drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] An embodiment of the present invention provides a specific implementation method for establishing a steam turbine model, see below. Figure 1 The method specifically includes the following: Step 100: Determine the reference state of the steam turbine based on the preset steam turbine unit parameter values; In this embodiment of the invention, the baseline state in step 100 refers to the overall valve position command reaching 100%, the high-pressure regulating valve being fully open, and the unit power reaching the rated power Q. e All parameters of the unit are stable. At this time, the main steam pressure in front of the turbine is the reference pressure P0, and the back pressure P of the unit is recorded. b The main steam temperature T0 and the reheat steam temperature T1.

[0023] Step 200: Determine the combined valve positions and power of multiple units during the process of the steam turbine transitioning from multiple states to the reference state.

[0024] Specifically, by adjusting the integrated valve position of the unit, the main steam pressure is changed. The integrated valve position of the unit and the power of multiple units are recorded when the steam turbine recovers from the current state to the reference state. This process is repeated multiple times to record the integrated valve position of multiple units and the power of multiple units.

[0025] Step 300: Establish a turbine model based on the combined valve positions and power of multiple units.

[0026] Using the integrated valve position command obtained in step 200 as the dependent variable and the unit power as the independent variable, a function is obtained. Then, the overview is integrated into the existing turbine model to generate the turbine model proposed in this application.

[0027] As described above, the turbine model establishment method provided in this embodiment of the invention includes: firstly, determining the reference state of the turbine based on preset turbine unit parameter values; then, determining multiple integrated valve positions and multiple unit powers during the process of the turbine transitioning from multiple states to the reference state; and finally, establishing a turbine model based on the multiple integrated valve positions and multiple unit powers. This invention obtains the functional relationship between the integrated valve position and unit power during load increase and decrease by conducting flow characteristic tests on the unit, and integrates this function into the original turbine model. In this process, the influence of main steam pressure is considered to obtain a new model. This model considers the actual flow characteristics of the unit and the influence of main steam pressure on the turbine's steam inlet flow, thus having wider adaptability and improving model accuracy and the accuracy of power system stability analysis.

[0028] In one embodiment, the reference state includes: the main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature corresponding to when the unit power reaches the rated power.

[0029] Specifically, adjust the unit parameters to achieve the following state: the overall valve position command reaches 100%, the high-pressure regulating valve is fully open, and the unit power reaches the rated power Q. eAll parameters of the unit are stable. At this time, the main steam pressure in front of the turbine is the reference pressure P0, and the back pressure P of the unit is recorded. b The main steam temperature T0 and reheat steam temperature T1, and the reference pressure P0 and unit back pressure P b The main steam temperature T0 and the reheat steam temperature T1 are used as adjustment reference values.

[0030] Furthermore, the baseline state refers to the main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature corresponding to the condition when the integrated valve position command reaches 100%, the high-pressure regulating valve is fully open, and the unit reaches its rated power. These parameters are used as the baseline values. Changing the integrated valve position to a stable value is equivalent to changing the valve opening, which causes changes in unit power, main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature. Then, other equipment in the unit is adjusted (while maintaining the changed integrated valve position value), such as the boiler's fuel quantity, to bring the aforementioned parameters such as main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature back to the baseline values. The unit power, which changes with these parameters, is not considered during adjustment. Once the main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature return to the baseline values ​​and stabilize, the integrated valve position and unit power at this point are recorded, representing a point (x, y) in the function. By sequentially closing or opening the overall valve position and repeating the above operation, a series of points are obtained, thereby generating a piecewise linear function.

[0031] In one embodiment, see Figure 2 Step 200 specifically includes: Step 201: Change the integrated valve position of the unit multiple times to generate the multiple states; Step 202: Record the integrated valve position of the turbine unit and the power of multiple units when the turbine recovers from the multiple states to the reference state.

[0032] In steps 201 and 202, it is preferable to gradually decrease the integrated valve position of the unit. After each command to decrease the integrated valve position, the main steam pressure is adjusted back and stabilized at the aforementioned reference pressure P0, while the unit back pressure, main steam temperature, and reheat steam temperature are adjusted and stabilized at the aforementioned recorded values. After the unit parameters stabilize again, the integrated valve position of the unit is recorded at this time. X down and unit power Q down After recording, continue to decrease the overall valve position command and repeat the above operation until the overall valve position command reaches the preset threshold.

[0033] Correspondingly, gradually increase the integrated valve position of the unit. After each increase in the integrated valve position command, adjust the main steam pressure to return and stabilize at the aforementioned reference pressure P0. Simultaneously, adjust the unit back pressure, main steam temperature, and reheat steam temperature to stabilize at the values ​​recorded in the first step. After the unit parameters stabilize again, record the integrated valve position of the unit at this time. X up and unit power Q up After recording is complete, continue adding integrated valve position commands and repeat the above operation until the integrated valve position commands reach the preset threshold.

[0034] In one embodiment, see Figure 3 Step 300 specifically includes: Step 301: Based on the integrated valve positions of multiple units and the power of multiple units, establish the turbine model of the turbine during the load increase and load decrease processes, wherein the integrated valve position of the unit corresponds one-to-one with the power of the unit.

[0035] Specifically, the integrated valve position command obtained in step 200 X down Dependent variable: Unit power Q down Using the independent variable, obtain the function f down ( x ). For functions f down ( x Differentiate to obtain the function f down ’ ( x ); the integrated valve position command obtained in step 3 X up Dependent variable: Unit power Q up Using the independent variable, obtain the function f up ( x ). For functions f up ( x Differentiate to obtain the function f up ’ ( x ).

[0036] Additionally, when using the new model, the function selection is performed when the unit is under increased load. f up ’ ( x When the unit is in a reduced load state, select... f down ’( x ).

[0037] As described above, the turbine model establishment method provided in this embodiment of the invention includes: firstly, determining the reference state of the turbine based on preset turbine unit parameter values; then, determining multiple integrated valve positions and multiple unit powers during the process of the turbine transitioning from multiple states to the reference state; and finally, establishing a turbine model based on the multiple integrated valve positions and multiple unit powers. This invention obtains the functional relationship between the integrated valve position and unit power during load increase and decrease by conducting flow characteristic tests on the unit, and integrates this function into the original turbine model. In this process, the influence of main steam pressure is considered to obtain a new model. This model considers the actual flow characteristics of the unit and the influence of main steam pressure on the turbine's steam inlet flow, thus having wider adaptability and improving model accuracy and the accuracy of power system stability analysis.

[0038] To further illustrate this solution, taking a 660MW supercritical unit as an example, this invention provides a specific application example of the turbine model establishment method, which includes the following: (see details below) Figures 4 to 6 .

[0039] S1: Determine the reference pressure.

[0040] Adjust the unit parameters to achieve the following state: the overall valve position command reaches 100%, the high-pressure regulating valve is fully open, and the unit power reaches the rated power Q. e All parameters of the unit are stable. At this time, the main steam pressure in front of the turbine is the reference pressure P0, and the back pressure P of the unit is recorded. b The main steam temperature T0 and the reheat steam temperature T1.

[0041] S2: Decrease the unit's overall valve position and record the unit's overall valve position and unit power.

[0042] Specifically, the integrated valve position of the unit is gradually reduced from 100%, decreasing by 1% each time. After each reduction command, the main steam pressure is adjusted back to and stabilized at the aforementioned reference pressure P0. Simultaneously, the unit back pressure, main steam temperature, and reheat steam temperature are adjusted and stabilized at the aforementioned recorded values. After the unit parameters stabilize again, the integrated valve position of the unit is recorded at this time. X down and unit power Q down After recording, continue to decrease the overall valve position command and repeat the above operation until the overall valve position command reaches 40%.

[0043] S3: Add the integrated valve position of the unit and record the integrated valve position and the unit power.

[0044] Similar to step S2, gradually increase the unit's integrated valve position from 40%, increasing it by 1% each time. After each increase in the integrated valve position command, adjust the main steam pressure to return to and stabilize at the aforementioned reference pressure P0. Simultaneously, adjust the unit back pressure, main steam temperature, and reheat steam temperature to stabilize at the values ​​recorded in the first step. After the unit parameters stabilize again, record the unit's integrated valve position at this time. X up and unit power Q up After recording is complete, continue adding integrated valve position commands and repeat the above operation until the integrated valve position command reaches 100%.

[0045] S4: Establish a turbine model based on the combined valve positions and power data of multiple units.

[0046] The integrated valve position command obtained in steps S2 and S3 X down Dependent variable: Unit power Q down Using the independent variable, obtain the function f down ( x ). For functions f down ( x Differentiate to obtain the function f down ’ ( x ); the integrated valve position command obtained in step 3 X up Dependent variable: Unit power Q up Using the independent variable, obtain the function f up ( x ). For functions f up ( x Differentiate to obtain the function f up ’ ( x ).

[0047] When using the new model, the function is selected when the unit is under increased load. f up ’ ( x When the unit is in a reduced load state, select... f down ’ ( x The main difference between the turbine model establishment method provided in this invention and existing technologies lies in the addition of two functions. fup ’ ( x )and f down ’ ( x These two functions are used to correct the integrated valve position (flow command), so that the model can reflect the actual flow characteristics of the unit.

[0048] The new model was used to simulate the primary frequency regulation operation of the unit, and the simulation results were compared with those of the original model. Figure 7 and Figure 8 As can be seen, the simulation results of the new model are closer to the actual experimental process than those of the original model.

[0049] exist Figure 7 as well as Figure 8 In the middle, T d — Boiler drum heat storage time constant, Tsh — Superheater volume time constant, k — Flow coefficient, T CH —High-pressure cylinder volumetric time constant, T RH —Reheater volume time constant, T CO —Connecting pipe volume time constant, λ—High-pressure cylinder power overshoot coefficient, F HP —High-pressure cylinder work ratio coefficient, F IP —Medium-pressure cylinder work ratio coefficient, F LP —Low-pressure cylinder work ratio coefficient, P M —Mechanical power

[0050] As described above, embodiments of the present invention provide a steam turbine model and modeling method that considers the influence of unit flow characteristics and main steam pressure. By conducting flow characteristic tests on the unit, the functional relationship between the unit's comprehensive valve position and unit power during load increase and load decrease processes is obtained. f up ( x ), f down (x) For functions f up ( x ), f down ( x Differentiation yields the function f up ’(x) and f down ’ ( x ), will function f up ’(x) and f down’ ( x The model was integrated into the existing turbine model, the flow command was modified, and the influence of main steam pressure was considered to obtain a new model. This model takes into account the actual flow characteristics of the unit and the influence of main steam pressure on the turbine's steam inlet, making it more adaptable and improving the model accuracy and the accuracy of power system stability analysis.

[0051] Based on the same inventive concept, this application also provides a turbine model building apparatus, which can be used to implement the method described in the above embodiments, as shown in the following embodiments. Since the principle of the turbine model building apparatus in solving the problem is similar to that of the turbine model building method, the implementation of the turbine model building apparatus can refer to the implementation of the turbine model building method, and repeated details will not be elaborated further. As used below, the terms "unit" or "module" can refer to a combination of software and / or hardware that implements a predetermined function. Although the system described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0052] The embodiments of the present invention provide a specific implementation of a turbine model building device capable of realizing a turbine model building method, see below. Figure 9 The turbine model building device specifically includes the following components: The reference state determination module 10 is used to determine the reference state of the steam turbine based on the preset steam turbine unit parameter values; Valve position determination module 20 is used to determine the combined valve position and power of multiple units during the process of the steam turbine from multiple states to the reference state; Model building module 30 is used to build a steam turbine model based on the combined valve positions of multiple units and the power of multiple units.

[0053] In one embodiment, the reference state includes: the main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature corresponding to when the unit power reaches the rated power.

[0054] In one embodiment, see Figure 10 The valve position determination module 20 includes: The state generation unit 201 is used to change the integrated valve position of the unit multiple times to generate the multiple states; The data recording unit 202 is used to record the integrated valve position of the turbine unit and the power of the multiple units when the turbine recovers from the multiple states to the reference state.

[0055] In one embodiment, see Figure 11 The model building module 30 includes: The model building unit 301 is used to build a turbine model of the turbine during the load increase and load decrease processes based on the integrated valve positions of multiple units and the power of multiple units, wherein the integrated valve positions of the units correspond one-to-one with the power of the units.

[0056] As described above, the turbine model building device provided in this embodiment of the invention includes: first, determining the reference state of the turbine based on preset turbine unit parameter values; then, determining multiple integrated valve positions and multiple unit powers during the process of the turbine transitioning from multiple states to the reference state; and finally, establishing a turbine model based on the multiple integrated valve positions and multiple unit powers. This invention obtains the functional relationship between the integrated valve position and unit power during load increase and decrease by conducting flow characteristic tests on the unit, and integrates this function into the original turbine model. In this process, the influence of main steam pressure is considered to obtain a new model. This model considers the actual flow characteristics of the unit and the influence of main steam pressure on the turbine's steam inlet flow, thus having wider adaptability and improving model accuracy and the accuracy of power system stability analysis.

[0057] The embodiments of this application also provide a specific implementation of an electronic device capable of implementing all the steps in the turbine model establishment method described in the above embodiments, see [link to implementation details]. Figure 12 The electronic devices specifically include the following: Processor 1201, memory 1202, communications interface 1203, and bus 1204; The processor 1201, memory 1202, and communication interface 1203 communicate with each other via bus 1204; the communication interface 1203 is used to realize information transmission between server-side devices, power measurement devices, and user-side devices and other related devices.

[0058] The processor 1201 is used to call the computer program in the memory 1202. When the processor executes the computer program, it implements all the steps in the turbine model building method in the above embodiment. For example, when the processor executes the computer program, it implements the following steps: Step 100: Determine the reference state of the steam turbine based on the preset steam turbine unit parameter values; Step 200: Determine the combined valve positions and power of multiple units during the process of the steam turbine transitioning from multiple states to the reference state; Step 300: Establish a turbine model based on the combined valve positions and power of multiple units.

[0059] Embodiments of this application also provide a computer-readable storage medium capable of implementing all steps of the turbine model building method in the above embodiments. The computer-readable storage medium stores a computer program that, when executed by a processor, implements all steps of the turbine model building method in the above embodiments. For example, when the processor executes the computer program, it implements the following steps: Step 100: Determine the reference state of the steam turbine based on the preset steam turbine unit parameter values; Step 200: Determine the combined valve positions and power of multiple units during the process of the steam turbine transitioning from multiple states to the reference state; Step 300: Establish a turbine model based on the combined valve positions and power of multiple units.

[0060] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, hardware + program embodiments are relatively simple in description because they are fundamentally similar to method embodiments; relevant parts can be referred to the descriptions in the method embodiments.

[0061] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0062] While this application provides method operation steps as shown in the embodiments or flowcharts, more or fewer operation steps may be included based on conventional or non-inventive labor. The order of steps listed in the embodiments is merely one possible execution order among many and does not represent the only execution order. In actual device or client product execution, the method can be executed in the order shown in the embodiments or drawings or in parallel (e.g., in a parallel processor or multi-threaded processing environment).

[0063] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0064] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0065] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0066] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0067] Specific embodiments have been used to illustrate the principles and implementation methods of this invention. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A method for establishing a steam turbine model, characterized in that, include: The reference state of the steam turbine is determined based on the preset steam turbine unit parameter values; Determine the combined valve positions and power of multiple units during the process of the steam turbine transitioning from multiple states to the reference state; A steam turbine model was established based on the combined valve positions and power of multiple units. The reference conditions include: the main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature corresponding to when the unit power reaches the rated power. Determining the combined valve positions and power of multiple units during the process of the steam turbine transitioning from multiple states to the reference state includes: The integrated valve position of the unit is changed multiple times to generate the multiple states; Record the integrated valve position of the turbine unit and the power of multiple units when the turbine recovers from the multiple states to the reference state, specifically: Gradually decrease the integrated valve position of the unit; after each decrease command, adjust the main steam pressure back to and stabilize it at the main steam pressure, and simultaneously adjust the unit back pressure, main steam temperature, and reheat steam temperature to the levels corresponding to when the unit power reaches rated power; after the unit parameters stabilize again, record the integrated valve position of the unit at this time. X down and unit power Q down After recording, continue to decrease the integrated valve position command and repeat the above operation until the integrated valve position command reaches the preset threshold. Correspondingly, the integrated valve position of the unit is gradually increased. After each increase in the integrated valve position command, the main steam pressure is adjusted back and stabilized to the main steam pressure. At the same time, the unit back pressure, main steam temperature, and reheat steam temperature are adjusted and stabilized to the unit back pressure, main steam temperature, and reheat steam temperature corresponding to the unit power reaching the rated power, respectively. After the unit parameters stabilize again, the integrated valve position of the unit is recorded. X up and unit power Q up After recording, continue to add integrated valve position commands and repeat the above operation until the integrated valve position commands reach the preset threshold.

2. The method for establishing a steam turbine model according to claim 1, characterized in that, The process of establishing a steam turbine model based on the combined valve positions and power of multiple units includes: Based on the integrated valve positions and power of multiple units, turbine models are established for the turbine during load increase and load decrease processes, wherein the integrated valve positions of the units correspond one-to-one with the power of the units.

3. A steam turbine model building device, characterized in that, include: The reference state determination module is used to determine the reference state of the steam turbine based on preset steam turbine unit parameter values; The valve position determination module is used to determine the combined valve positions and power of multiple units during the process of the steam turbine transitioning from multiple states to the reference state. The model building module is used to build a steam turbine model based on the combined valve positions and power of multiple units. The reference conditions include: the main steam pressure, unit back pressure, main steam temperature, and reheat steam temperature corresponding to when the unit power reaches the rated power. The valve position determination module includes: A state generation unit is used to change the integrated valve position of the unit multiple times to generate the multiple states; The data recording unit is used to record the integrated valve position of the turbine unit and the power of multiple units when the turbine recovers from the multiple states to the reference state. Specifically: Gradually decrease the integrated valve position of the unit; after each decrease command, adjust the main steam pressure back to and stabilize it at the main steam pressure, and simultaneously adjust the unit back pressure, main steam temperature, and reheat steam temperature to the levels corresponding to when the unit power reaches rated power; after the unit parameters stabilize again, record the integrated valve position of the unit at this time. X down and unit power Q down After recording, continue to decrease the integrated valve position command and repeat the above operation until the integrated valve position command reaches the preset threshold. Correspondingly, the integrated valve position of the unit is gradually increased. After each increase in the integrated valve position command, the main steam pressure is adjusted back and stabilized to the main steam pressure. At the same time, the unit back pressure, main steam temperature, and reheat steam temperature are adjusted and stabilized to the unit back pressure, main steam temperature, and reheat steam temperature corresponding to the unit power reaching the rated power, respectively. After the unit parameters stabilize again, the integrated valve position of the unit is recorded. X up and unit power Q up After recording, continue to add integrated valve position commands and repeat the above operation until the integrated valve position commands reach the preset threshold.

4. The turbine model building device according to claim 3, characterized in that, The model building module includes: The model building unit is used to build turbine models of the turbine during load increase and load decrease processes based on the integrated valve positions and power of multiple units, wherein the integrated valve positions of the units correspond one-to-one with the power of the units.

5. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the turbine model establishment method according to any one of claims 1 to 2.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the turbine model building method according to any one of claims 1 to 2.

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