A method, apparatus, device, and medium for steam backpressure stabilization

Abstract

The application discloses a steam back pressure stabilizing method, device, equipment and medium, comprising: obtaining the outlet steam pressure and the inlet steam flow of a target steam turbine, and obtaining the standby steam flow of a target heat user; the target steam turbine provides required steam for the target heat user; determining the main adjustment parameter of the speed regulating valve of the target steam turbine according to the outlet steam pressure and the set outlet given pressure; determining the secondary adjustment parameter of the speed regulating valve according to the standby steam flow and the inlet steam flow; adjusting the opening of the speed regulating valve according to the main adjustment parameter and the secondary adjustment parameter. The application adjusts the opening of the speed regulating valve of the steam turbine based on the outlet steam pressure and the inlet steam flow of the target steam turbine, and the standby steam flow of the target heat user, so that the matching degree of the outlet steam pressure of the target steam turbine and the standby steam flow of the target heat user is improved, and the steam system pressure stability is improved in the case that the heat user consumption fluctuates greatly.

Description

Technical Field

[0001] This invention relates to the field of combined heat and power technology, and in particular to a method, apparatus, equipment and medium for stabilizing steam back pressure. Background Technology

[0002] Back-pressure heating units (hereinafter referred to as "back-pressure units") are units that operate in combined heat and power (CHP) mode, enabling the rational use of energy. Among various types of generator sets, back-pressure units are widely used because the exhaust steam from the turbine is directly used for heating, eliminating the cold source loss of the condenser, resulting in high thermodynamic cycle efficiency, thus saving energy and reducing pollutant emissions.

[0003] However, when back-pressure turbines supply steam to heat users, the matching degree between the steam supply from the back-pressure turbines and the steam demand of the heat users is low, resulting in poor stability in steam supply. Therefore, improving the stability of steam supply from back-pressure turbines is an urgent problem to be solved. Summary of the Invention

[0004] This application provides a steam back pressure stabilization method, apparatus, equipment, and medium, which solves the technical problem in the prior art where the matching degree between the steam supply of back pressure units and the steam demand of heat users is low, resulting in poor stability of the back pressure units when supplying steam. This achieves the technical effect of improving the stability of the steam supply from back pressure units.

[0005] In a first aspect, this application provides a method for stabilizing vapor back pressure, the method comprising:

[0006] Obtain the outlet steam pressure and inlet steam flow rate of the target steam turbine, as well as the standby steam flow rate of the target heat user; the target steam turbine provides the required steam to the target heat user;

[0007] Based on the outlet steam pressure and the set outlet pressure, determine the main adjustment parameters of the speed regulating valve of the target steam turbine;

[0008] Determine the secondary adjustment parameters of the speed regulating valve based on the standby steam flow rate and the inlet steam flow rate;

[0009] The opening of the speed regulating valve is adjusted according to the main and secondary adjustment parameters to stabilize the steam back pressure of the target steam turbine.

[0010] Furthermore, the inlet steam flow rate of the target steam turbine is obtained, including:

[0011] The inlet steam temperature, inlet steam pressure, and inlet steam volume of the target steam turbine are detected.

[0012] The inlet steam flow rate is determined based on the inlet steam temperature, inlet steam pressure, and inlet steam volume.

[0013] Furthermore, the inlet steam flow rate of the target steam turbine is obtained, including:

[0014] The first steam flow rate flowing into the target steam turbine and the second steam flow rate flowing into the desuperheater and pressure reducer, the desuperheater and pressure reducer being associated with the target steam turbine, are obtained.

[0015] The inlet steam flow rate of the target steam turbine is determined based on the first steam flow rate and the second steam flow rate.

[0016] Furthermore, based on the outlet steam pressure and the set outlet pressure, the main adjustment parameters of the speed regulating valve of the target steam turbine are determined, including:

[0017] Determine the pressure difference parameter based on the outlet steam pressure and the given outlet pressure;

[0018] The main adjustment parameters of the speed regulating valve are determined based on the pressure difference parameters and the set pressure threshold.

[0019] Furthermore, based on the pressure difference parameter and the set pressure threshold, the main adjustment parameters of the speed regulating valve are determined, including:

[0020] If the pressure difference parameter is greater than the pressure threshold, determine the main adjustment parameter used to reduce the opening of the speed regulating valve;

[0021] If the pressure difference parameter is less than the pressure threshold, determine the main adjustment parameter used to increase the opening of the speed regulating valve.

[0022] Furthermore, based on the standby steam flow rate and the inlet steam flow rate, the secondary adjustment parameters of the speed regulating valve are determined, including:

[0023] Determine the flow difference parameter based on the ready steam flow rate and the inlet steam flow rate;

[0024] Based on the flow difference parameters and the set flow threshold, the secondary adjustment parameters of the speed regulating valve are determined.

[0025] Furthermore, based on the flow difference parameter and the set flow threshold, the secondary adjustment parameters of the speed regulating valve are determined, including:

[0026] If the flow difference parameter is greater than the flow threshold, determine the secondary adjustment parameter used to reduce the opening of the speed regulating valve;

[0027] If the flow difference parameter is less than the flow threshold, determine the secondary adjustment parameter used to increase the opening of the speed regulating valve.

[0028] Secondly, this application provides a steam back pressure stabilizing device, the device comprising:

[0029] The acquisition module is used to acquire the outlet steam pressure and inlet steam flow rate of the target steam turbine, as well as the standby steam flow rate of the target heat user; the target steam turbine provides the required steam to the target heat user;

[0030] The main adjustment parameter determination module is used to determine the main adjustment parameters of the speed regulating valve of the target steam turbine based on the outlet steam pressure and the set outlet given pressure.

[0031] The secondary adjustment parameter determination module is used to determine the secondary adjustment parameters of the speed regulating valve based on the standby steam flow rate and the inlet steam flow rate.

[0032] The opening adjustment module is used to adjust the opening of the speed regulating valve according to the main adjustment parameters and the secondary adjustment parameters in order to stabilize the steam back pressure of the target steam turbine.

[0033] Thirdly, this application provides an electronic device, comprising:

[0034] processor;

[0035] Memory used to store processor-executable instructions;

[0036] The processor is configured to execute a vapor back pressure stabilization method as provided in the first aspect.

[0037] Fourthly, this application provides a non-transitory computer-readable storage medium that, when the instructions in the storage medium are executed by the processor of an electronic device, enables the electronic device to perform a vapor back pressure stabilization method as provided in the first aspect.

[0038] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0039] This embodiment determines the main and secondary adjustment parameters based on the outlet steam pressure and inlet steam flow of the target steam turbine, as well as the standby steam flow of the target heat user. The opening of the turbine's speed regulating valve is adjusted to improve the matching degree between the outlet steam pressure of the target steam turbine and the standby steam flow of the target heat user. This allows for rapid adjustment even when the heat user's (i.e., steam user) consumption fluctuates significantly, improving the pressure stability of the steam system and enhancing energy utilization efficiency. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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.

[0041] Figure 1 A schematic flowchart of a steam back pressure stabilization method provided in this application;

[0042] Figure 2 This application is based on Figure 1 The method shown provides a schematic diagram of a PID control structure;

[0043] Figure 3 A schematic diagram of a steam back pressure stabilizing device provided in this application;

[0044] Figure 4 This is a schematic diagram of the structure of an electronic device provided in this application. Detailed Implementation

[0045] This application provides a method for stabilizing steam back pressure, which solves the technical problem in the prior art where the matching degree between the steam supply of back pressure units and the steam demand of heat users is low, resulting in poor stability of back pressure units when supplying steam.

[0046] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0047] A method for stabilizing steam back pressure includes: acquiring the outlet steam pressure and inlet steam flow rate of a target steam turbine, and acquiring the standby steam flow rate of a target heat user; the target steam turbine providing the required steam to the target heat user; determining the main adjustment parameters of the speed regulating valve of the target steam turbine based on the outlet steam pressure and a set outlet pressure; determining the secondary adjustment parameters of the speed regulating valve based on the standby steam flow rate and the inlet steam flow rate; and adjusting the opening of the speed regulating valve based on the main and secondary adjustment parameters to stabilize the steam back pressure of the target steam turbine.

[0048] This embodiment determines the main and secondary adjustment parameters based on the outlet steam pressure and inlet steam flow of the target steam turbine, as well as the standby steam flow of the target heat user. The opening of the turbine's speed regulating valve is adjusted to improve the matching degree between the outlet steam pressure of the target steam turbine and the standby steam flow of the target heat user. This allows for rapid adjustment even when the heat user's (i.e., steam user) consumption fluctuates significantly, improving the pressure stability of the steam system and enhancing energy utilization efficiency.

[0049] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0050] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0051] Back-pressure turbine units are combined heat and power (CHP) units, which enable the rational use of energy. Among various types of generator sets, back-pressure turbine units are widely used because the exhaust steam from the turbine is directly used for heating, eliminating the cold source loss of the condenser, resulting in high thermodynamic cycle efficiency, thus saving energy and reducing pollutant emissions.

[0052] Heat users who receive steam generally require that the parameters of the heating steam be stable and that it reach a certain pressure and temperature. This requires the back pressure unit to have a certain steam parameter regulation function.

[0053] However, when back-pressure turbines supply steam to external steam networks such as those of large steel complexes, the steam consumption of these users usually changes with the production process and load. The back-pressure turbines cannot respond in time, resulting in a low match between the steam supply of the back-pressure turbines and the steam demand of the users, which can easily lead to overpressure in the steam network.

[0054] For example, if the steam demand of heat users changes, and the turbine unit cannot respond in time, it may cause overpressure in the steam pipeline network or require supplemental steam output through a desuperheater and pressure reducer. If the steam demand of heat users changes and the turbine unit is required to frequently adjust accordingly, this necessitates timely manual adjustments by personnel, which is labor-intensive and prone to operational errors, adversely affecting safe and stable operation. Furthermore, frequent changes in the steam output of the turbine unit can cause large fluctuations in external network pressure, overpressure or low pressure in the steam pipeline network, and other problems.

[0055] To address the aforementioned problems, this embodiment provides the following: Figure 1 The method shown includes steps S11-S14 for stabilizing vapor back pressure.

[0056] Step S11: Obtain the outlet steam pressure and inlet steam flow rate of the target steam turbine, and obtain the standby steam flow rate of the target heat user; the target steam turbine provides the required steam to the target heat user;

[0057] Step S12: Determine the main adjustment parameters of the speed regulating valve of the target steam turbine based on the outlet steam pressure and the set outlet pressure.

[0058] Step S13: Determine the secondary adjustment parameters of the speed regulating valve based on the standby steam flow rate and the inlet steam flow rate;

[0059] Step S14: Adjust the opening of the speed regulating valve according to the main adjustment parameters and the secondary adjustment parameters to stabilize the steam back pressure of the target steam turbine.

[0060] Regarding step S11, the outlet steam pressure and inlet steam flow rate of the target steam turbine are obtained, as well as the standby steam flow rate of the target heat user; the target steam turbine provides the required steam to the target heat user.

[0061] The outlet steam pressure of the target steam turbine can be obtained using detection equipment. This equipment can be a pressure sensor or similar device.

[0062] The inlet steam flow rate of the target steam turbine mainly consists of two parts: the first steam flow rate flowing into the target steam turbine and the second steam flow rate flowing into the desuperheater and pressure reducer. Therefore, the inlet steam flow rate of the target steam turbine can be determined according to the following steps S111-S112:

[0063] Step S111: Obtain the first steam flow rate flowing into the target steam turbine and the second steam flow rate flowing into the desuperheater and pressure reducer. The desuperheater and pressure reducer refers to the desuperheater and pressure reducer associated with the target steam turbine.

[0064] Step S112: Determine the inlet steam flow rate of the target steam turbine based on the first steam flow rate and the second steam flow rate.

[0065] The initial steam flow rate into the target turbine is typically measured using a flow meter. However, flow meters can only measure the volume of fluid flowing under current operating conditions. Since the density of a fluid varies significantly under different pressures and temperatures, calculating the flow rate solely based on fluid volume is inaccurate. Therefore, in practical applications, if the required flow accuracy for the target turbine is not high, a flow meter can be used directly to measure the initial steam flow rate.

[0066] If the accuracy of the flow rate of the target steam turbine is required to be high, the first steam flow rate flowing into the target steam turbine can be determined by steps S1111-S1112.

[0067] Step S1111: Detect the inlet steam temperature, inlet steam pressure, and inlet steam volume of the steam flowing into the target steam turbine;

[0068] Step S1112: Determine the first steam flow rate based on the inlet steam temperature, inlet steam pressure, and inlet steam volume of the steam flowing into the target steam turbine.

[0069] Temperature, pressure, and volume are measured at the inlet of the target steam turbine using temperature, pressure, and volume measuring equipment. Based on these measurements, the initial steam flow rate into the target steam turbine is determined. This calculation of the initial steam flow rate takes into account the effects of temperature and pressure on fluid density, resulting in higher accuracy.

[0070] Similarly, when the accuracy requirement is not high, the second steam flow rate flowing into the desuperheater and pressure reducer can be directly measured by a flow meter. When the accuracy requirement is high, the second steam flow rate can be determined by steps S1113-S1114.

[0071] Step S1113: Detect the inlet steam temperature, inlet steam pressure, and inlet steam volume of the desuperheater and pressure reducer associated with the target steam turbine;

[0072] Step S1114: Determine the second steam flow rate based on the steam inlet temperature, steam inlet pressure, and steam inlet volume flowing into the desuperheater and pressure reducer.

[0073] The principles of steps S1111-S1112 and steps S1113-S1114 are similar. Combining the two, we can obtain the following steps:

[0074] The inlet steam temperature, inlet steam pressure, and inlet steam volume of the target steam turbine are detected.

[0075] The inlet steam flow rate is determined based on the inlet steam temperature, inlet steam pressure, and inlet steam volume.

[0076] The target steam turbine can provide the required steam to the target heat user. The target heat user can refer to any equipment that can receive the steam generated by the target steam turbine, such as a deaerator.

[0077] Target heat users typically have specific requirements for the required steam flow rate, so the available steam flow rate can be determined directly based on their actual steam demand. For example, if there are 10 target heat users, the total steam demand of these 10 users can be used as the available steam flow rate.

[0078] In a better scenario, the standby steam flow rate of the target heat user and the inlet steam flow rate of the target steam turbine should refer to the flow rate at the same pressure and temperature, in order to reduce the difference between the actual demand and the actual supply of steam.

[0079] After executing step S11, steps S12 and S13 can be executed. It should be noted that steps S12 and S13 can be executed simultaneously, or step S12 can be executed first, or step S13 can be executed first. The specific choice can be made according to the actual situation, and this embodiment does not impose any restrictions on this.

[0080] Regarding step S12, the main adjustment parameters of the speed regulating valve of the target steam turbine are determined based on the outlet steam pressure and the set outlet given pressure.

[0081] The outlet pressure can be set according to the turbine model or parameters.

[0082] The obtained outlet steam pressure is compared with the set outlet pressure to determine whether the current opening of the turbine's speed regulating valve is appropriate. If it is not appropriate, the corresponding main adjustment parameters are determined. The opening of the speed regulating valve can then be adjusted according to the main adjustment parameters to adjust the outlet steam pressure so that the outlet steam pressure matches the outlet pressure.

[0083] Specifically, the pressure difference parameter can be determined based on the outlet steam pressure and the given outlet pressure; then, the main adjustment parameter of the speed regulating valve can be determined based on the pressure difference parameter and the set pressure threshold.

[0084] The pressure difference parameter can be the difference between the outlet steam pressure and the set outlet pressure, or other parameters associated with that difference. The pressure threshold can be set according to the turbine model or other parameters. The pressure threshold defines a reasonable range for the difference between the outlet steam pressure and the set outlet pressure.

[0085] Compare the pressure difference parameter with the pressure threshold, and determine the main adjustment parameter based on the comparison results.

[0086] If the pressure difference parameter is greater than the pressure threshold, determine the main adjustment parameter used to reduce the opening of the speed regulating valve.

[0087] If the pressure difference parameter is less than the pressure threshold, determine the main adjustment parameter used to increase the opening of the speed regulating valve.

[0088] If the pressure difference parameter equals the pressure threshold, the opening of the speed regulating valve remains unchanged. It should be noted that "the opening of the speed regulating valve remains unchanged" is only based on the pressure difference parameter being equal to the pressure threshold, and does not mean that the speed regulating valve will not change its opening due to other factors (such as the secondary adjustment parameter involved in step S13).

[0089] The speed regulating valve can be controlled using PID control (Proportional-Integral-Derivative Control), meaning the main adjustment parameters determined above include proportional control parameters, integral control parameters, and derivative control parameters. Of course, other control methods can also be selected; this embodiment does not impose any restrictions on this.

[0090] The outlet steam pressure has a direct impact on the stability of the steam back pressure provided by the turbine to heat users. Therefore, the outlet steam pressure can be adjusted by using the outlet given pressure and pressure threshold, thereby realizing closed-loop control of the outlet steam pressure and improving the stability of the turbine output steam.

[0091] Regarding step S13, the auxiliary adjustment parameters of the speed regulating valve are determined based on the standby steam flow rate and the inlet steam flow rate.

[0092] Fluctuations in the standby steam flow rate are a significant factor causing fluctuations in the turbine outlet steam pressure. This embodiment compares the acquired standby steam flow rate with the inlet steam flow rate to determine if the current opening of the turbine's speed regulating valve is appropriate. If not, corresponding secondary adjustment parameters are determined, and the opening of the speed regulating valve can be adjusted based on these parameters to regulate the outlet steam pressure, ensuring that the outlet steam pressure matches the given outlet pressure.

[0093] Specifically, the flow difference parameter can be determined based on the standby steam flow rate and the inlet steam flow rate; and the auxiliary adjustment parameter of the speed regulating valve can be determined based on the flow difference parameter and the set flow threshold.

[0094] The flow difference parameter can be the difference between the standby steam flow rate and the inlet steam flow rate, or other parameters associated with that difference. The flow threshold can be set according to the turbine model or other parameters. The flow threshold defines a reasonable range for the difference between the standby steam flow rate and the inlet steam flow rate.

[0095] Compare the flow difference parameter with the set flow threshold, and determine the secondary adjustment parameter based on the comparison result.

[0096] If the flow difference parameter is greater than the flow threshold, determine the secondary adjustment parameter used to reduce the opening of the speed regulating valve.

[0097] If the flow difference parameter is less than the flow threshold, determine the secondary adjustment parameter used to increase the opening of the speed regulating valve.

[0098] If the flow difference parameter equals the flow threshold, the opening of the speed regulating valve remains unchanged. It should be noted that "the opening of the speed regulating valve remains unchanged" is only based on the assumption that the flow difference parameter equals the flow threshold, and does not mean that the speed regulating valve will not change its opening due to other factors (such as the main adjustment parameter involved in step S12).

[0099] The speed regulating valve can be controlled using PID control (Proportional-Integral-Derivative Control), meaning the determined secondary adjustment parameters include proportional control parameters, integral control parameters, and derivative control parameters. Of course, other control methods can also be chosen; this embodiment does not impose any restrictions on this.

[0100] The standby steam flow rate can interfere with the stability of the steam back pressure provided by the turbine to the heat user. Therefore, the outlet steam pressure can be adjusted by using the standby steam flow rate, the inlet steam flow rate, and the flow threshold, thereby achieving closed-loop control of the outlet steam pressure and improving the stability of the turbine's output steam.

[0101] Regarding step S14, the opening of the speed regulating valve is adjusted according to the main adjustment parameters and the secondary adjustment parameters to stabilize the steam back pressure of the target steam turbine.

[0102] By adjusting the opening of the speed regulating valve by combining the main and auxiliary adjustment parameters, the matching degree between the standby steam flow of the heat user and the outlet steam pressure of the steam turbine can be improved, thereby improving the stability of the steam back pressure of the target steam turbine, effectively improving energy utilization efficiency, and at the same time ensuring the stable operation of the steam turbine and related equipment to a certain extent, and extending the service life of the steam turbine and related equipment.

[0103] It is important to note that the primary and secondary adjustment parameters may be generated at different times. When the primary adjustment parameter is generated alone, the speed regulating valve opening is adjusted directly in response to the primary adjustment parameter. Similarly, when the secondary adjustment parameter is generated alone, the speed regulating valve opening is adjusted directly in response to the secondary adjustment parameter. When both primary and secondary adjustment parameters are generated simultaneously, the speed regulating valve opening can be adjusted by combining both primary and secondary adjustment parameters.

[0104] In summary, this embodiment adjusts the opening of the turbine's speed regulating valve based on the target turbine's outlet steam pressure and inlet steam flow rate, as well as the target heat user's standby steam flow rate. This improves the matching degree between the target turbine's outlet steam pressure and the target heat user's standby steam flow rate, enabling rapid adjustment even when the heat user's (i.e., steam user's) consumption fluctuates significantly. This enhances the steam system's pressure stability and improves energy utilization efficiency.

[0105] like Figure 2 The diagram shown illustrates the PID control structure of a steam back pressure stabilization method provided in this application. By introducing the standby steam flow rate, inlet steam flow rate, and outlet steam pressure, a three-impulse control strategy is implemented. The standby steam flow rate and inlet steam flow rate are used as feedforwards for back pressure control, forming a control structure as follows: Figure 2 The cascade control system shown is described. In this system, the outlet steam pressure is the primary variable, controlled by feedback regulation via the main controller; the inlet steam flow is the secondary variable, its introduction effectively suppressing fluctuations in inlet pressure; fluctuations in the standby steam flow cause changes in outlet pressure, interfering with the system's steam pressure stability. This embodiment utilizes changes in the inlet steam flow based on the standby steam flow to adjust the turbine speed control valve opening, restoring the heat user pressure to a given value and ensuring relatively stable user steam pressure. When using the solution provided in this embodiment for commissioning, the inventors can ensure that external steam pressure fluctuations are controlled within ±0.15 MPa, significantly improving the stability of the steam system pressure.

[0106] Based on the same inventive concept, this embodiment provides as follows: Figure 3 The steam back pressure stabilizing device shown includes:

[0107] The acquisition module 31 is used to acquire the outlet steam pressure and inlet steam flow of the target steam turbine, as well as the standby steam flow of the target heat user; the target steam turbine provides the required steam to the target heat user;

[0108] The main adjustment parameter determination module 32 is used to determine the main adjustment parameters of the speed regulating valve of the target steam turbine based on the outlet steam pressure and the set outlet given pressure.

[0109] The secondary adjustment parameter determination module 33 is used to determine the secondary adjustment parameters of the speed regulating valve based on the standby steam flow rate and the inlet steam flow rate;

[0110] The opening adjustment module 34 is used to adjust the opening of the speed regulating valve according to the main adjustment parameters and the auxiliary adjustment parameters in order to stabilize the steam back pressure of the target steam turbine.

[0111] Furthermore, the acquisition module 31 includes:

[0112] The detection submodule is used to detect the inlet steam temperature, inlet steam pressure, and inlet steam volume of the target steam turbine.

[0113] The determination submodule is used to determine the inlet steam flow rate based on the inlet steam temperature, inlet steam pressure, and inlet steam volume.

[0114] Furthermore, the acquisition module 31 includes:

[0115] The acquisition submodule is used to acquire the first steam flow rate flowing into the target steam turbine and the second steam flow rate flowing into the desuperheater and pressure reducer, which refers to the desuperheater and pressure reducer associated with the target steam turbine.

[0116] The determination submodule is used to determine the inlet steam flow rate of the target steam turbine based on the first steam flow rate and the second steam flow rate.

[0117] Furthermore, the main adjustment parameter determination module 32 includes:

[0118] The pressure difference parameter determination submodule is used to determine the pressure difference parameter based on the outlet steam pressure and the given outlet pressure.

[0119] The main adjustment parameter determination submodule is used to determine the main adjustment parameters of the speed regulating valve based on the pressure difference parameter and the set pressure threshold.

[0120] Furthermore, the main adjustment parameter determination submodule is specifically used for:

[0121] If the pressure difference parameter is greater than the pressure threshold, determine the main adjustment parameter used to reduce the opening of the speed regulating valve;

[0122] If the pressure difference parameter is less than the pressure threshold, determine the main adjustment parameter used to increase the opening of the speed regulating valve.

[0123] Furthermore, the secondary adjustment parameter determination module 33 includes:

[0124] The flow difference parameter determination submodule is used to determine the flow difference parameter based on the steam flow rate to be used and the inlet steam flow rate.

[0125] The secondary adjustment parameter determination submodule is used to determine the secondary adjustment parameters of the speed regulating valve based on the flow difference parameter and the set flow threshold.

[0126] Furthermore, the sub-adjustment parameter determination submodule is specifically used for:

[0127] If the flow difference parameter is greater than the flow threshold, determine the secondary adjustment parameter used to reduce the opening of the speed regulating valve;

[0128] If the flow difference parameter is less than the flow threshold, determine the secondary adjustment parameter used to increase the opening of the speed regulating valve.

[0129] Based on the same inventive concept, this embodiment provides as follows: Figure 4 An electronic device shown is characterized in that it comprises:

[0130] Processor 41;

[0131] Memory 42 is used to store executable instructions of processor 41;

[0132] The processor 41 is configured to execute a vapor back pressure stabilization method as described above.

[0133] Based on the same inventive concept, this embodiment provides a non-transitory computer-readable storage medium that, when the instructions in the storage medium are executed by the processor 41 of an electronic device, enables the electronic device to perform a steam back pressure stabilization method as described above.

[0134] Since the electronic device described in this embodiment is an electronic device used to implement the information processing method in the embodiments of this application, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the information processing method described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the information processing method in the embodiments of this application falls within the scope of protection of this application.

[0135] 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.

[0136] 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.

[0137] 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 1The function specified in one or more boxes.

[0138] 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.

[0139] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0140] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A method for stabilizing steam back pressure, characterized in that, The method includes: The outlet steam pressure and inlet steam flow rate of the target steam turbine are obtained, as well as the standby steam flow rate of the target heat user; the target steam turbine provides the required steam to the target heat user; Based on the outlet steam pressure and the set outlet pressure, determine the main adjustment parameters of the speed regulating valve of the target steam turbine; Based on the standby steam flow rate and the inlet steam flow rate, determine the secondary adjustment parameters of the speed regulating valve; The opening of the speed regulating valve is adjusted according to the main adjustment parameter and the secondary adjustment parameter to stabilize the steam back pressure of the target steam turbine. Obtaining the inlet steam flow rate of the target steam turbine includes: Obtain a first steam flow rate flowing into the target steam turbine, and obtain a second steam flow rate flowing into a desuperheater and pressure reducer, wherein the desuperheater and pressure reducer refers to a desuperheater and pressure reducer associated with the target steam turbine; The inlet steam flow rate of the target steam turbine is determined based on the first steam flow rate and the second steam flow rate. The step of determining the secondary adjustment parameters of the speed regulating valve based on the standby steam flow rate and the inlet steam flow rate includes: Determine the flow difference parameter based on the required steam flow rate and the inlet steam flow rate; The auxiliary adjustment parameters of the speed regulating valve are determined based on the flow difference parameter and the set flow threshold.

2. The method as described in claim 1, characterized in that, Obtaining the inlet steam flow rate of the target steam turbine includes: The inlet steam temperature, inlet steam pressure, and inlet steam volume of the target steam turbine are detected. The inlet steam flow rate is determined based on the inlet steam temperature, the inlet steam pressure, and the inlet steam volume.

3. The method as described in claim 1, characterized in that, The step of determining the main adjustment parameters of the speed regulating valve of the target steam turbine based on the outlet steam pressure and the set outlet pressure includes: The pressure difference parameter is determined based on the outlet steam pressure and the outlet given pressure; The main adjustment parameters of the speed regulating valve are determined based on the pressure difference parameters and the set pressure threshold.

4. The method as described in claim 3, characterized in that, The step of determining the main adjustment parameter of the speed regulating valve based on the pressure difference parameter and the set pressure threshold includes: If the pressure difference parameter is greater than the pressure threshold, determine the main adjustment parameter for reducing the opening of the speed regulating valve; If the pressure difference parameter is less than the pressure threshold, determine the main adjustment parameter for increasing the opening of the speed regulating valve.

5. The method as described in claim 1, characterized in that, Determining the secondary adjustment parameter of the speed regulating valve based on the flow difference parameter and the set flow threshold includes: If the flow difference parameter is greater than the flow threshold, determine the secondary adjustment parameter for reducing the opening of the speed regulating valve; If the flow difference parameter is less than the flow threshold, determine the secondary adjustment parameter for increasing the opening of the speed regulating valve.

6. A steam back pressure stabilizing device, characterized in that, The device includes: The acquisition module is used to acquire the outlet steam pressure and inlet steam flow rate of the target steam turbine, as well as the standby steam flow rate of the target heat user; the target steam turbine provides the required steam to the target heat user; The main adjustment parameter determination module is used to determine the main adjustment parameters of the speed regulating valve of the target steam turbine based on the outlet steam pressure and the set outlet given pressure. The secondary adjustment parameter determination module is used to determine the secondary adjustment parameters of the speed regulating valve based on the standby steam flow rate and the inlet steam flow rate; The opening adjustment module is used to adjust the opening of the speed regulating valve according to the main adjustment parameter and the secondary adjustment parameter in order to stabilize the steam back pressure of the target steam turbine. The acquisition module includes: The acquisition submodule is used to acquire the first steam flow rate flowing into the target steam turbine and the second steam flow rate flowing into the desuperheater and pressure reducer, which refers to the desuperheater and pressure reducer associated with the target steam turbine. The determination submodule is used to determine the inlet steam flow rate of the target steam turbine based on the first steam flow rate and the second steam flow rate; The secondary adjustment parameter determination module includes: The flow difference parameter determination submodule is used to determine the flow difference parameter based on the steam flow rate to be used and the inlet steam flow rate. The secondary adjustment parameter determination submodule is used to determine the secondary adjustment parameters of the speed regulating valve based on the flow difference parameter and the set flow threshold.

7. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute a vapor back pressure stabilization method as described in any one of claims 1 to 5.

8. A non-transitory computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of an electronic device, enable the electronic device to perform a method for stabilizing vapor back pressure as claimed in any one of claims 1 to 5.

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