A method for reconfiguring the operating field of a gas turbine driven supercharging system

Abstract

The application provides a reconstruction method of a gas turbine driven supercharging system operation domain, in which firstly, through energy flow analysis on a constructed supercharging system-load steady-state matching energy flow analysis model, the energy flow characteristics of the supercharging system-load are obtained, and the constructed supercharging system-load transient matching point migration model is simulated to obtain the operation point migration law of the supercharging system-load under transient conditions; then, based on the energy flow characteristics of the supercharging system-load, the feasible operation domain of the supercharging system-load is reconstructed to obtain the steady-state operation domain of the supercharging system-load; and according to the operation point migration law under transient conditions, the feasible operation domain of the supercharging system-load is reconstructed to obtain the transient operation domain of the supercharging system-load. The application can accurately reconstruct the steady-state operation domain and the transient operation domain corresponding to the gas turbine driven supercharging system, and provide a decision basis for subsequent efficient operation and safe operation under full working conditions.

Description

Technical Field

[0001] This application relates to the field of fluid dynamics, and relates to, but is not limited to, a method for reconstructing the operating domain of a gas turbine-driven supercharging system. Background Technology

[0002] A gas turbine-driven turbocharging system consists of a gas turbine and a compressor unit, which, together with the load, air-cooling system, and valve chamber, constitute a gas pressurization and transportation system. The gas turbine drives the compressor unit, which in turn drives the load to achieve gas pressurization and transportation. During the pressurization process of this gas pressurization and transportation system, the operating characteristics of each component influence and constrain each other, exhibiting complex nonlinear dynamic characteristics. In actual operation, the gas turbine-driven turbocharging system needs to frequently handle high-dynamic processes such as start-up, shutdown, and rapid load changes, accompanied by significant energy fluctuations and transient response lags. Furthermore, the load parameters only respond after a considerable time interval between operating condition changes, resulting in a "small horse pulling a heavy load" phenomenon. Thus, the matching mechanism between the turbocharging system and the load, air-cooling system, etc., in a gas transportation system with high inertia and long time delays is unclear, easily causing the turbocharging system to enter an inefficient operating zone and exceeding safety limits during transient operation. Summary of the Invention

[0003] To address the problems of existing technologies, this application provides a method for reconstructing the operating domain of a gas turbine-driven turbocharger system. The method aims to accurately reconstruct the steady-state and transient operating domains of the gas turbine-driven turbocharger system, providing a basis for decision-making regarding efficient and safe operation under all operating conditions.

[0004] The technical solution of this application embodiment is implemented as follows:

[0005] This application provides a method for reconstructing the operating domain of a gas turbine-driven supercharging system, the method comprising:

[0006] The input characteristics, output characteristics, conversion characteristics, and dissipation characteristics of gas in the gas boosting and transport system of the gas turbine driven boosting system are analyzed to obtain the steady-state matching energy flow analysis model of the boosting system-load and the transient matching point migration model of the boosting system-load.

[0007] Energy flow analysis was performed on the steady-state matching energy flow analysis model of the booster system-load to obtain the steady-state energy flow characteristics of the booster system-load. Simulation was then performed on the transient matching point migration model of the booster system-load to obtain the migration law of the operating point of the booster system-load under transient conditions.

[0008] Based on the steady-state energy flow characteristics of the booster system-load, the feasible operating domain of the booster system-load is reconstructed to obtain the steady-state operating domain of the booster system-load.

[0009] Based on the operating point migration pattern under the transient operating conditions, the feasible operating domain of the booster system-load is reconstructed to obtain the transient operating domain of the booster system-load.

[0010] In some embodiments, the gas boosting and transport system includes: a gas turbine-driven boosting system, a gas transport pipeline, and an air-cooling system connected in sequence; the analysis of the input characteristics, output characteristics, conversion characteristics, and dissipation characteristics of the gas in the gas boosting and transport system where the gas turbine-driven boosting system is located, to obtain a boosting system-load steady-state matching energy flow analysis model and a boosting system-load transient matching point migration model, includes:

[0011] The input characteristics, output characteristics, conversion characteristics, and dissipation characteristics are respectively substituted into the gas thermodynamic equation and the gas dynamic equation for analysis, to obtain the load energy flow analysis equation of the gas transport pipeline, the air cooler energy flow analysis equation of the air-cooled system, and the booster system energy flow analysis equation of the gas turbine driven booster system.

[0012] Steady-state coupling is performed on the load energy flow analysis equation, the air cooler energy flow analysis equation, and the booster system energy flow analysis equation to obtain the booster system-load steady-state matching energy flow analysis model.

[0013] The load energy flow analysis equation, the air cooler energy flow analysis equation, and the booster system energy flow analysis equation are transiently coupled to obtain the booster system-load transient matching point migration model.

[0014] In some embodiments, the load energy flow analysis equation is:

[0015] ;

[0016] in, Inlet for gas transport pipelines Gas density at that location; For the outlet of gas transport pipelines Gas flow rate at the location; For the outlet of gas transport pipelines The entropy generated at that point It is a time variable; The control volume for gas input into the gas transport pipeline; This represents the pipeline distance increment for gas transport pipelines; For the outlet of gas transport pipelines Gas density at that location; This represents the increase in entropy generated by the gas in the gas transport pipeline; The coefficient of friction; This refers to the inner diameter of the gas transport pipeline; For the outlet of gas transport pipelines Local temperature at the location; The convective heat transfer coefficient between the gas and the ground within the gas transport pipeline; This is the inner circumference of the gas transport pipeline; The earth's temperature; Inlet for gas transport pipelines Gas flow rate at the location; For gas at the inlet of the gas transport pipeline enthalpy; For gas at the outlet of the gas transport pipeline Enthalpy at the location.

[0017] In some embodiments, the energy flow analysis equation for the air cooler is:

[0018] ;

[0019] in, For the air cooler inlet Gas density at that location; For the outlet of the air cooler Gas flow rate at the location; For the outlet of the air cooler The entropy generated at that point It is a time variable; This represents the increment in the piping distance of the air cooler; This represents the increase in entropy generated by the gas in the air cooler; air cooler outlet Gas density at that location; The overall heat transfer coefficient of the air cooler; This is the inner circumference of the air cooler; This refers to the local temperature at the outlet of the air cooler. The earth's temperature; The control volume for gas input to the air cooler; For the air cooler inlet Gas flow rate at the location; For the gas at the inlet of the air cooler Enthalpy at the point; Gas at the outlet of the air cooler Enthalpy at the location.

[0020] In some embodiments, the energy flow analysis equation of the booster system is:

[0021] ;

[0022] in, The density of the gas within the gas turbine-driven supercharging system; The angular velocity of the gas turbine-driven supercharging system; This refers to a portion of the volume of a gas turbine-driven supercharging system. The gas flow rate is driven by the gas turbine to boost the pressure system; The gas flow rate exiting the gas turbine-driven supercharging system; The moment of inertia of the gas turbine-driven supercharging system; The input torque is provided by the gas turbine-driven supercharging system; For efficiency; and For constant parameters; The flow rate of gas within the gas turbine-driven supercharging system; It is the enthalpy of the gas in the gas turbine-driven supercharging system.

[0023] In some embodiments, before reconstructing the feasible operating domain of the booster system-load based on the steady-state energy flow characteristics of the booster system-load to obtain the steady-state operating domain of the booster system-load, the method further includes:

[0024] Obtain the system characteristic curve of the gas turbine driven supercharging system, and the load characteristic curve of the gas supercharging and transport system that characterizes the safe operating boundary of the load;

[0025] By integrating the system characteristic curve and the load characteristic curve, the feasible operating domain of the booster system-load is obtained.

[0026] In some embodiments, the system characteristic curves include: surge boundary line, blockage boundary line, minimum speed boundary line, and maximum speed boundary line.

[0027] In some embodiments, integrating the system characteristic curve and the load characteristic curve to obtain the feasible operating domain of the booster system-load includes:

[0028] Obtain the system characteristic curve and load characteristic curve plotted on the same coordinate axis to obtain the characteristic diagram;

[0029] Based on the set load transport capacity and pressure level, adjust the load characteristic curve in the characteristic diagram to multiple load curves;

[0030] The region enclosed by the multiple load curves and the system characteristic curve in the characteristic diagram on the coordinate axis is determined as the feasible operating domain of the booster system-load.

[0031] In some embodiments, reconstructing the feasible operating domain of the booster system-load based on the steady-state energy flow characteristics of the booster system-load to obtain the steady-state operating domain of the booster system-load includes:

[0032] Based on the steady-state energy flow characteristics of the booster system-load, the feasible operating domain of the booster system-load is divided into efficiency levels to obtain multiple efficiency level regions;

[0033] The region corresponding to the highest efficiency level among the multiple efficiency level regions is determined as the steady-state operating domain of the booster system-load.

[0034] In some embodiments, reconstructing the feasible operating domain of the booster system-load based on the operating point migration pattern under the transient operating condition to obtain the transient operating domain of the booster system-load includes:

[0035] The migration pattern of the operating point under the transient condition is mapped to the feasible operating domain of the booster system-load, and the boundary distance is calculated to obtain the maximum offset of the operating point of the booster system-load under the transient condition.

[0036] By using the maximum offset of the operating point of the booster system-load under transient conditions, the boundary of the feasible operating domain of the booster system-load is translated in the opposite direction to obtain the transient operating domain of the booster system-load.

[0037] The beneficial effects of the technical solutions provided in this application include at least the following:

[0038] The method for reconstructing the operating domain of a gas turbine-driven supercharger system provided in this application first analyzes the input, output, conversion, and dissipation characteristics of the gas in the gas supercharger transport system where the gas turbine-driven supercharger system is located, obtaining a steady-state matching energy flow analysis model and a transient matching point migration model of the supercharger system-load. Energy flow analysis is then performed on the steady-state matching energy flow analysis model to obtain the steady-state energy flow characteristics of the supercharger system-load, and the transient matching point migration model of the supercharger system-load is simulated to obtain the operating point migration law of the supercharger system-load under transient conditions. Then, based on the steady-state energy flow characteristics of the supercharger system-load, the feasible operating domain of the supercharger system-load is reconstructed to obtain the steady-state operating domain of the supercharger system-load. Finally, according to the operating point migration law under transient conditions, the feasible operating domain of the supercharger system-load is reconstructed to obtain the transient matching point migration law of the supercharger system-load. The system operates within a specific operating domain. Firstly, by utilizing the established steady-state / transient matching energy flow analysis model of the booster system-load (i.e., the steady-state matching energy flow analysis model and the transient matching point migration model), steady-state energy flow characteristics accurately depicting the gas input, output, conversion, and dissipation characteristics of the gas booster system, as well as the operating point migration patterns under transient conditions, can be obtained through steady-state energy flow analysis and transient simulation. Then, by leveraging the steady-state energy flow characteristics, the steady-state matching characteristics of the booster system-load within the feasible operating domain can be explored, enabling the reconstruction of the steady-state operating range and providing a decision-making basis for efficient operation under all operating conditions. Simultaneously, by leveraging the operating point migration patterns under transient conditions, the transient matching characteristics of the booster system-load within the feasible operating domain can be explored, enabling the reconstruction of the transient operating range and providing a decision-making basis for safe operation under all operating conditions.

[0039] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the technical solutions provided in the embodiments of the present invention. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0041] Figure 1 A flowchart illustrating a method for reconstructing the operating domain of a gas turbine-driven supercharging system, provided in an embodiment of this application;

[0042] Figure 2A flowchart illustrating the practical application of a method for reconstructing the operating domain of a gas turbine-driven supercharging system, as provided in this application embodiment.

[0043] Figure 3 This is a schematic diagram of the steady-state energy flow characteristic analysis output from the steady-state matching energy flow analysis model of the booster system-load provided in the embodiments of this application;

[0044] Figure 4 A schematic diagram of the steady-state operating domain determined in the method for reconstructing the operating domain of a gas turbine-driven supercharging system provided in the embodiments of this application;

[0045] Figure 5 A schematic diagram of transient energy flow characteristic analysis output by the transient matching point migration model of the booster system-load provided in this application embodiment;

[0046] Figure 6 A schematic diagram of the transient operating domain determined in the reconstruction method of the operating domain of a gas turbine-driven supercharging system provided in the embodiments of this application;

[0047] Figure 7 A schematic diagram showing the comparison between the actual and simulated values ​​of the outlet pressure of the booster system over time;

[0048] Figure 8 This diagram illustrates the error between simulated and actual values ​​under transient conditions for reconstructing the operating domain of a gas turbine-driven supercharging system using the method provided in this application embodiment. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The following embodiments are used to illustrate this application, but are not intended to limit the scope of this application. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0050] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0051] It should be noted that the terms "first, second, and third" used in the embodiments of this application are merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first, second, and third" can be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0052] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application pertain. It should also be understood that terms such as those defined in general dictionaries should be understood to have a meaning consistent with their meaning in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0053] See Figure 1 The diagram shown is a flowchart illustrating a method for reconstructing the operating domain of a gas turbine-driven supercharging system according to an embodiment of this application. Figure 1 The method is described as follows:

[0054] Step 101: Analyze the input characteristics, output characteristics, conversion characteristics, and dissipation characteristics of the gas in the gas boosting and transport system of the gas turbine driven boosting system to obtain the boosting system-load steady-state matching energy flow analysis model and the boosting system-load transient matching point migration model.

[0055] In some embodiments of this application, the gas boosting and transport system in which the gas turbine-driven boosting system is located may include: a gas turbine-driven boosting system, a gas transport pipeline, and an air-cooling system connected in sequence; wherein, the gas transport pipeline may serve as the load of the entire gas boosting and transport system, and the air-cooling system may include multiple air coolers.

[0056] Here, gases (i.e., gases that can be transported by the gas pressurization and transportation system) include, but are not limited to: natural gas, hydrogen, high-purity gases (such as hydrogen, nitrogen, oxygen, etc.), and specialty gases (such as silane, phosphine, etc.).

[0057] In some embodiments of this application, when the gas boosting and transport system includes: the gas turbine-driven boosting system, the gas transport pipeline, and the air-cooling system connected in sequence, the above-mentioned step 101 can be implemented by the following steps 1011 to 1013. Figure 1 (not shown in the image)

[0058] Step 1011: Substitute the input features, output features, conversion features, and dissipation features into the gas thermodynamic equation and gas dynamic equation respectively for analysis to obtain the load energy flow analysis equation of the gas transport pipeline, the air cooler energy flow analysis equation of the air-cooled system, and the booster system energy flow analysis equation of the gas turbine driven booster system.

[0059] In some embodiments of this application, the input features may include: input feature 1 of gas input to the gas turbine-driven supercharging system, input feature 2 of gas input to the gas transport pipeline, and input feature 3 of gas input to the air-cooling system; correspondingly, the conversion features may include: conversion feature 1 of gas in the gas turbine-driven supercharging system, conversion feature 2 of gas in the gas transport pipeline, and conversion feature 3 of gas in the air-cooling system, and so on. The above-mentioned input features and dissipation features may include multiple corresponding features.

[0060] In some embodiments of this application, the gas thermodynamic equation mainly describes the relationships between the macroscopic properties of a gas in thermodynamic equilibrium (such as pressure, temperature, density, internal energy, enthalpy, and entropy), and the changes in these properties under energy interactions (work and heat transfer). Correspondingly, the gas dynamic equation mainly describes the laws governing gas motion, i.e., how the velocity field, pressure field, and density field change with space and time, based on conservation laws and considering transport effects such as viscosity and thermal conductivity.

[0061] It should be noted that for air coolers in air-cooled systems, heat transfer equations are also involved; for gas transport pipelines, flow resistance equations are also involved, etc.

[0062] In some embodiments of this application, the input characteristics, output characteristics, conversion characteristics, and dissipation characteristics of the gas in the gas transport pipeline can be substituted into the gas thermodynamic equation and the gas kinetic equation for analysis, respectively, to obtain the load energy flow analysis equation of the gas transport pipeline. Here, the gas transport pipeline is taken as the load, and based on the uniform distribution characteristics of the given pipeline cross-section, a one-dimensional conservation equation (including the continuity equation and the momentum equation) is derived. In addition, considering that temperature is also an important influencing factor of gas transport, its entropy equation includes entropy transfer and entropy generation. Here, in addition to the conservation equation describing the energy transfer process, the energy flow analysis also requires the description of the energy retention process, and the total energy in its control volume can be expressed as a function of the gas internal energy and kinetic energy. That is, the load energy flow analysis equation is finally established as shown in formula (1):

[0063] Formula (1);

[0064] in, Inlet for gas transport pipelines Gas density at that location; For the outlet of gas transport pipelines Gas flow rate at the location; For the outlet of gas transport pipelines The entropy generated at that point It is a time variable; The control volume for gas input into the gas transport pipeline; This represents the pipeline distance increment for gas transport pipelines; For the outlet of gas transport pipelines Gas density at that location; This represents the increase in entropy generated by the gas in the gas transport pipeline; The coefficient of friction; This refers to the inner diameter of the gas transport pipeline; For the outlet of gas transport pipelines Local temperature at the location; The convective heat transfer coefficient between the gas and the ground within the gas transport pipeline; This is the inner circumference of the gas transport pipeline; The earth's temperature; Inlet for gas transport pipelines Gas flow rate at the location; For gas at the inlet of the gas transport pipeline enthalpy; For gas at the outlet of the gas transport pipeline Enthalpy at the location.

[0065] In some embodiments of this application, the input characteristics, output characteristics, conversion characteristics, and dissipation characteristics of the air cooler in the air-cooling system can be substituted into the gas thermodynamic equation and the gas dynamic equation for analysis, respectively, to obtain the air cooler energy flow analysis equation. Here, in the gas turbine drive system, the air cooler usually adopts forced convection heat transfer, and the flow rate of the cooling air is approximately proportional to the input power. The total heat transfer coefficient can be obtained from the internal heat transfer coefficient and the external heat transfer coefficient. In the air cooler, due to its short length, friction loss can be ignored. Finally, the energy flow analysis equation of the air cooler shown in the following formula (2) can be obtained:

[0066] Formula (2);

[0067] in, For the air cooler inlet Gas density at that location; For the outlet of the air cooler Gas flow rate at the location; For the outlet of the air cooler The entropy generated at that point It is a time variable; This represents the increment in the piping distance of the air cooler; This represents the increase in entropy generated by the gas in the air cooler; air cooler outlet Gas density at that location; The overall heat transfer coefficient of the air cooler; This is the inner circumference of the air cooler; This refers to the local temperature at the outlet of the air cooler. The earth's temperature; The control volume for gas input to the air cooler; For the air cooler inlet Gas flow rate at the location; For the gas at the inlet of the air cooler Enthalpy at the point; Gas at the outlet of the air cooler Enthalpy at the location.

[0068] In some embodiments of this application, the input characteristics, output characteristics, conversion characteristics, and dissipation characteristics of the gas in the gas turbine-driven supercharging system can be substituted into the gas thermodynamic equation and the gas dynamic equation for analysis, respectively, to obtain the supercharging system energy flow analysis equation of the gas turbine-driven supercharging system. Here, in the gas turbine-driven supercharging system, the gas turbine output torque drives the compressor unit, which is simplified to the input torque. The relationship between the moment of inertia, the input torque, and the output torque can be established from the transient equation of the rotor. The output torque can be expressed as a function of gas flow rate, velocity, and inlet / outlet radius. Finally, the energy flow analysis equation of the air cooler shown in the following formula (3) can be obtained:

[0069] Formula (3);

[0070] in, The density of the gas within the gas turbine-driven supercharging system; The angular velocity of the gas turbine-driven supercharging system; This refers to a portion of the volume of a gas turbine-driven supercharging system. The gas flow rate is driven by the gas turbine to boost the pressure system; The gas flow rate exiting the gas turbine-driven supercharging system; The moment of inertia of the gas turbine-driven supercharging system; The input torque is provided by the gas turbine-driven supercharging system; For efficiency; and For constant parameters; The flow rate of gas within the gas turbine-driven supercharging system; It is the enthalpy of the gas in the gas turbine-driven supercharging system.

[0071] Thus, the above three energy flow analysis equations can effectively describe the input characteristics, output characteristics, conversion characteristics, and dissipation characteristics of the gas in the booster system and the load, thereby providing data support for the subsequent construction of a steady-state / transient matching energy flow analysis model of the booster system and the load.

[0072] Step 1012: Steady-state coupling is performed on the load energy flow analysis equation, the air cooler energy flow analysis equation, and the booster system energy flow analysis equation to obtain the booster system-load steady-state matching energy flow analysis model.

[0073] Step 1013: Transiently couple the load energy flow analysis equation, the air cooler energy flow analysis equation, and the booster system energy flow analysis equation to obtain the booster system-load transient matching point migration model.

[0074] In some embodiments of this application, the load energy flow analysis equation, the air cooler energy flow analysis equation, and the booster system energy flow analysis equation can be combined and coupled in a steady state (eliminating the time derivative term and establishing a set of algebraic equations). Furthermore, based on the mass / energy conservation constraints, the combined equations can be solved to obtain a booster system-load steady-state matching energy flow analysis model that characterizes the pressure-flow distribution and efficiency characteristics of the system under equilibrium conditions.

[0075] Correspondingly, the load energy flow analysis equation, the air cooler energy flow analysis equation, and the booster system energy flow analysis equation can be combined and transiently coupled (retaining the time derivative term and constructing a differential-algebraic system). Using the steady-state solution as the initial condition, a booster system-load transient matching point migration model that characterizes the dynamic response under load changes or control commands (such as pressure fluctuations and speed transients) can be simulated.

[0076] In some embodiments of this application, in the process of constructing the transient matching point migration model of the booster system-load, that is, in terms of the transient matching of the booster system-load, it may include: a power turbine rotor module, a compressor module, a volumetric module, and a load module, etc. Among them, in the gas turbine driven booster system, the power turbine rotor module provides driving torque for the compressor. When the power of the gas turbine (power turbine rotor module) and the power of the compressor module are equal, the rotor of the gas turbine is in a balanced state with a constant speed. When there is a power difference between the two (power of the power turbine rotor module and power of the compressor module), the rotor speed of the gas turbine will change, that is, the acceleration and deceleration motion of the rotor of the gas turbine will continue until the power of the two is equal. Here, considering the flow characteristics and volumetric characteristics of the compressor module in the transient process, the inlet and outlet flow rates of the compressor module are not equal in the non-equilibrium state. An abstract volume is taken from the compressor module, and it is assumed that its inlet and outlet pressures and enthalpy values ​​are the same. Correspondingly, the load transient characteristic analysis model (booster system-load transient matching point migration model) can be referred to as the following formula (4):

[0077] Formula (4);

[0078] in, The cross-sectional area of ​​the gas transport pipeline in the gas pressurization and transport system where the gas turbine-driven supercharging system is located; This represents the density of the gas in the gas transport pipeline. It is a time variable; This refers to the distance from the compressor outlet in the gas turbine-driven supercharging system. The velocity of the gas in the gas transport pipeline; The angular velocity of the gas turbine-driven supercharging system; This refers to the compressor outlet pressure in a gas turbine-driven booster system. It is the acceleration due to gravity; The coefficient of hydraulic friction; This refers to the inner diameter of the gas transport pipeline; This represents the flow rate of gas in the gas transport pipeline. This refers to the internal energy of the gas in the gas transport pipeline; The entropy of the gas in the gas transport pipeline; This refers to the enthalpy of the gas in the gas transport pipeline.

[0079] Step 102: Perform energy flow analysis on the steady-state matching energy flow analysis model of the booster system-load to obtain the steady-state energy flow characteristics of the booster system-load, and simulate the transient matching point migration model of the booster system-load to obtain the migration law of the operating point of the booster system-load under transient conditions.

[0080] In some embodiments of this application, the steady-state energy flow characteristics of the booster system-load can refer to a series of observable and quantifiable macroscopic physical characteristics and performance indicators exhibited by the energy flow when the entire system (i.e., the gas booster transport system in which the gas turbine-driven booster system is located) is in stable operating conditions. Here, steady state means that the parameters involved in the gas booster transport system, such as pressure, temperature, flow rate, and rotational speed, do not change with time; in other words, the gas booster transport system has reached an equilibrium state.

[0081] It should be noted that the steady-state energy flow characteristics of the pressurization system-load can be used to characterize the properties of gas in the entire process of input, conversion, transmission, dissipation and output in a gas pressurization and transport system.

[0082] In some embodiments of this application, the operating point migration law of the booster system-load under transient conditions refers to the trajectory of the operating parameters (such as flow rate and pressure ratio) of the gas booster transport system on the compressor characteristic diagram corresponding to the gas turbine-driven booster system as the gas booster transport system is disturbed (such as sudden changes in load demand, fuel increase or decrease, or changes in control commands).

[0083] Step 103: Based on the steady-state energy flow characteristics of the booster system-load, reconstruct the feasible operating domain of the booster system-load to obtain the steady-state operating domain of the booster system-load.

[0084] In some embodiments of this application, based on the steady-state energy flow characteristics of the booster system-load, a partial region screening, i.e. region reconstruction, can be performed on the known feasible operating domain of the booster system-load to obtain the steady-state operating domain of the booster system-load.

[0085] In some embodiments of this application, the steady-state matching characteristics of the booster system-load can be explored based on the steady-state energy flow characteristics of the booster system-load, that is, the steady-state operating domain can be reconstructed to obtain the steady-state operating domain of the booster system-load.

[0086] In some embodiments of this application, based on the known or determined feasible operating domain of the booster system-load, and combined with the energy flow analysis results, i.e. the steady-state energy flow characteristics of the booster system-load, the efficiency distribution of the operating point (coordinates of the flow rate-energy head in the feasible operating domain of the booster system-load) can be obtained (which may include: high efficiency, medium efficiency, low efficiency, etc.). According to the efficiency distribution, the high, medium and low efficiency regions in the feasible operating domain of the booster system-load are divided, thereby correcting the operating point based on the division structure to keep it as close as possible to the high efficiency operating range.

[0087] In some embodiments of this application, step 103 can be implemented by steps 1031 and 1032. Figure 1 (not shown in the image)

[0088] Step 1031: Based on the steady-state energy flow characteristics of the booster system-load, the feasible operating domain of the booster system-load is divided into efficiency levels to obtain multiple efficiency level regions.

[0089] For example, based on the steady-state energy flow characteristics of the booster system-load, the feasible operating domain of the booster system-load can be divided into efficiency levels to obtain three regions corresponding to high efficiency, namely: high efficiency region, medium efficiency region and low efficiency region.

[0090] Step 1032: Determine the region corresponding to the highest efficiency level among the multiple efficiency level regions as the steady-state operating domain of the booster system-load.

[0091] In some embodiments of this application, firstly, based on the known feasible operating domain of the booster system-load, and combined with the steady-state energy flow characteristics of the booster system-load, the steady-state matching characteristics of the booster system-load (i.e., the operating efficiency distribution of the feasible operating domain) can be obtained; then, based on the operating efficiency distribution of the feasible operating domain, a high-efficiency interval can be selected as the final steady-state operating domain; in this way, the reconstructing of the steady-state high-efficiency and safe operating domain can be achieved, thereby controlling the gas booster transport system to operate within the final steady-state operating domain, so as to ensure the efficient operation of the gas booster transport system.

[0092] In some embodiments of this application, the feasible operating domain of the booster system-load can be obtained by following steps A1 and A2. That is, before performing step 103 (i.e., steps 1031 and 1032) above, steps A1 and A2 can also be performed:

[0093] Step A1: Obtain the system characteristic curve of the gas turbine driven supercharging system and the load characteristic curve of the gas supercharging and transportation system that characterizes the safe operating boundary of the load.

[0094] In some embodiments of this application, the system characteristic curves include: surge boundary line (the lowest flow limit of the compressor in the gas turbine driven supercharger system), blockage boundary line (the highest flow limit of the compressor in the gas turbine driven supercharger system), minimum speed boundary line, and maximum speed boundary line.

[0095] Here, the system characteristic curves can further include: overspeed boundary curve, maximum temperature boundary line, load limit, and efficiency no-go zone, etc.

[0096] In some embodiments of this application, existing technical means can be used to obtain the load characteristic curve that characterizes the safe operating boundary of the load in a gas pressurized transport system, and this application does not impose specific limitations on this.

[0097] Step A2: Integrate the system characteristic curve and the load characteristic curve to obtain the steady-state safe operating domain of the booster system-load.

[0098] In some embodiments of this application, step A2 above can be implemented through the following process:

[0099] The first step is to obtain the system characteristic curve and load characteristic curve plotted on the same coordinate axis to obtain the characteristic diagram.

[0100] The second step is to adjust the load characteristic curve in the characteristic diagram to multiple load curves based on the set load transport volume and pressure level.

[0101] The third step is to determine the region enclosed by the multiple load curves and the system characteristic curves in the characteristic diagram on the coordinate axis as the feasible operating domain of the booster system-load.

[0102] In some embodiments of this application, firstly, the system characteristic curve and the load characteristic curve are plotted on the same coordinate axis to form a characteristic diagram. Secondly, once the load's transport capacity and pressure level are determined, the load characteristic curve on the characteristic diagram becomes an infinite number of curves (multiple load curves) between two quadratic curves. Then, the area enclosed by the multiple load curves on the characteristic diagram is matched with the system characteristic curve, and the overlapping area is determined as the feasible operating region of the booster system-load (i.e., the preliminary steady-state safe operating region). Here, the shape corresponding to the feasible operating region of the booster system-load obtained after matching is a curved polygon, whose boundaries are, in order: the maximum speed limit line of the gas turbine-driven booster system, the blockage limit line of the gas turbine-driven booster system, the minimum pressure limit line of the load pipeline outlet, the minimum speed limit line of the gas turbine-driven booster system, and the compressor surge limit line.

[0103] It should be noted that in special matching cases, such as when the load characteristic curve and the system characteristic curve do not intersect, it can be considered that the gas turbine-driven turbocharger system and the load cannot be matched, or when the load characteristic curve completely covers the system characteristic curve, meaning that the steady-state safe matching domain of the load and the gas turbine-driven turbocharger system is the entire operating domain of the gas turbine-driven turbocharger system. Other situations include when the feasible operating domain is located in the near-surge region, near-blockage region, or entirely within the high-efficiency operating region of the gas turbine-driven turbocharger system. Evaluating the matching between the gas turbine-driven turbocharger system and the load requires considering not only the area of ​​the matched operating domain but also the location of the feasible matching operating domain, avoiding matching into the near-surge and near-blockage regions as much as possible, and maximizing the area of ​​the high-efficiency operating region of the gas turbine-driven turbocharger system within the matched domain.

[0104] In some embodiments of this application, before integrating the system characteristic curve and the load characteristic curve to obtain the feasible operating domain of the booster system-load, the correction of gas volume flow rate, energy head and gas velocity can be further considered. That is, the feasible operating domain of the booster system-load can be obtained by combining the correction results, the system characteristic curve and the load characteristic curve. In this way, the accuracy of the obtained feasible operating domain of the booster system-load can be further improved.

[0105] In this way, by integrating the system characteristic curves of the gas turbine-driven supercharging system and the load characteristic curves of the gas supercharging and transport system that characterize the safe operating boundary of the load, the feasible operating domain of the supercharging system-load can be obtained efficiently and accurately.

[0106] Step 104: Based on the operating point migration law under the transient operating conditions, reconstruct the feasible operating domain of the booster system-load to obtain the transient operating domain of the booster system-load.

[0107] In some embodiments of this application, the feasible operating domain of the booster system-load can be modified or shifted as a whole according to the operating point migration law under transient operating conditions, so as to obtain the transient operating domain of the booster system-load.

[0108] In some embodiments of this application, the transient matching characteristics of the booster system-load can be explored based on the operating point migration law under transient operating conditions, that is, the transient operating domain can be reconstructed to obtain the transient operating domain of the booster system-load.

[0109] In some embodiments of this application, step 104 can be implemented by steps 1041 and 1042. Figure 1 (not shown in the image)

[0110] Step 1041: Map the migration pattern of the operating point under transient conditions to the feasible operating domain of the booster system-load and calculate the boundary distance to obtain the maximum offset of the operating point of the booster system-load under transient conditions.

[0111] Step 1042: Using the maximum offset of the operating point of the booster system-load under transient conditions, the boundary of the feasible operating domain of the booster system-load is translated in the opposite direction to obtain the transient operating domain of the booster system-load.

[0112] In some embodiments of this application, specifically in the stage of determining the transient operating domain of the booster system-load, the migration law of the operating point under transient conditions obtained from simulation (the operating point is the position of the current operating state in the flow-pressure diagram; wherein, the migration law is the relationship between the degree of offset of the operating point towards the safe operating boundary and the rate of change of the rotational speed) can be mapped to the feasible operating domain of the booster system-load for boundary distance calculation, thereby obtaining the maximum offset of the operating point of the booster system-load under transient conditions. Furthermore, based on the obtained maximum offset of the operating point of the booster system-load under transient conditions, the safe operating boundary of the feasible operating domain of the booster system-load is shifted in the opposite direction by a corresponding distance, thereby obtaining the corrected safe operating range under transient conditions, that is, realizing the reconstruction of the transient operating domain (obtaining the transient operating range of the booster system-load), and subsequently, the gas booster transport system can be controlled to operate within this transient operating range to ensure the safe operation of the gas booster transport system.

[0113] The method for reconstructing the operating domain of a gas turbine-driven supercharger system provided in this application first analyzes the input, output, conversion, and dissipation characteristics of the gas in the gas supercharger transport system where the gas turbine-driven supercharger system is located, obtaining a steady-state matching energy flow analysis model and a transient matching point migration model of the supercharger system-load. Energy flow analysis is then performed on the steady-state matching energy flow analysis model to obtain the steady-state energy flow characteristics of the supercharger system-load, and the transient matching point migration model of the supercharger system-load is simulated to obtain the operating point migration law of the supercharger system-load under transient operating conditions. Then, based on the steady-state energy flow characteristics of the supercharger system-load, the feasible operating domain of the supercharger system-load is reconstructed to obtain the steady-state operating domain of the supercharger system-load. Finally, based on the operating point migration law under transient operating conditions, the feasible operating domain of the supercharger system-load is reconstructed to obtain the transient operating domain of the supercharger system-load. Thus, firstly, using the established steady-state / transient matching energy flow analysis model of the supercharger system-load, Specifically, this application presents a steady-state matching energy flow analysis model for the booster system-load and a transient matching point migration model for the booster system-load. Through steady-state energy flow analysis and transient simulation, it can obtain steady-state energy flow characteristics that accurately characterize the gas input, output, conversion, and dissipation characteristics of the gas booster system within the gas booster system, as well as the operating point migration patterns under transient conditions. Then, by leveraging the steady-state energy flow characteristics, the steady-state matching characteristics of the booster system-load within the feasible operating domain can be identified, enabling the reconstruction of the steady-state operating range and providing a decision-making basis for efficient operation under all operating conditions. Simultaneously, by leveraging the operating point migration patterns under transient conditions, the transient matching characteristics of the booster system-load within the feasible operating domain can be identified, enabling the reconstruction of the transient operating range and providing a decision-making basis for safe operation under all operating conditions. In other words, this application can accurately reconstruct the steady-state and transient operating domains corresponding to the gas turbine-driven booster system, providing a decision-making basis for subsequent efficient and safe operation under all operating conditions.

[0114] Following the description above, refer to... Figure 2 The diagram shown is a flowchart illustrating the practical application of a method for reconstructing the operating domain of a gas turbine-driven supercharging system according to an embodiment of this application; wherein:

[0115] 201. Obtain the input characteristics, output characteristics, conversion characteristics, and dissipation characteristics of the gas in the gas boosting and transport system of the gas turbine driven boosting system.

[0116] 202. By inputting the multiple feature data obtained in 201 into the existing gas thermodynamic equations and gas dynamic equations for analysis, the following can be obtained in the gas pressurization and transportation system: the pressurization system energy flow analysis equation of the gas turbine driven pressurization system, the air cooler energy flow analysis equation of the air-cooled system, and the load energy flow analysis equation of the gas transportation pipeline.

[0117] Here, steady-state coupling and transient coupling are performed on the three energy flow analysis equations obtained in 202 to obtain the steady-state matching energy flow analysis model of the booster system-load in 203 and the transient matching point migration model of the booster system-load in 208, respectively.

[0118] Correspondingly, subsequent execution procedures can be performed based on the booster system-load steady-state matching energy flow analysis model (steady-state side) of 203 and the booster system-load transient matching point migration model (transient side) of 208, respectively, where:

[0119] Steady-state side: First, energy flow analysis is performed on the steady-state matching energy flow analysis model of the booster system-load obtained in 203 to obtain the steady-state energy flow characteristics of the booster system-load; second, the system characteristics of the booster system and the safe operating boundary of the load in 204 are obtained; then, with the obtained steady-state energy flow characteristics of the booster system-load, the feasible operating domain of the booster system-load constructed through the system characteristics of the booster system and the safe operating boundary of the load in 204 is mined for the steady-state matching characteristics of the booster system-load in 205 to obtain the reconstructed steady-state operating domain, that is, to realize the reconstruction of the steady-state operating range in 206, so that efficient operation can be achieved in this steady-state operating region, that is, 207.

[0120] Transient side: First, the transient matching point migration model of the booster system-load obtained in 208 is simulated to obtain the migration law of the booster system-load operating point under transient conditions, i.e., 209; Second, with the help of the migration law of the operating point under transient conditions in 209, the transient matching characteristics of the booster system-load in 210 are mined in the feasible operating domain of the constructed booster system-load to obtain the reconstructed transient operating domain, i.e., the reconstruction of the transient operating interval in 211, so that safe operation can be achieved in the subsequent transient operating region, i.e., 212.

[0121] As those skilled in the art should know, for compressor units in gas turbine-driven turbocharger systems, traditional analysis methods require discretizing the compressor unit's gas path, using partial differential dynamics equations to describe the interactions and influences between spatial parameters, and thermodynamic equations to describe the relationships between different parameters within each control volume. For steady-state processes, characteristic diagrams are used to simplify the partial differential and thermodynamic equations; for transient processes, steady-state characteristic diagrams are still used to approximate the partial differential equations, while inertia is concentrated and described using transient thermodynamic equations. This method typically has high accuracy for steady-state processes, but introduces errors in transient processes. Furthermore, traditional modeling methods are not intuitive enough for transient processes, especially in high-dynamic processes such as rapid start-stop of gas turbine-driven turbocharger systems, making it difficult to concisely reflect their energy exchange characteristics.

[0122] Based on this, the gas turbine-driven turbocharger system operation domain reconstruction method provided in this application can analyze the energy characteristics of each module in the gas turbocharger and transport system from the perspective of high dynamic energy flow analysis. It effectively describes the energy (gas) input characteristics, output characteristics, conversion characteristics, and dissipation characteristics of the gas turbine-driven turbocharger system and the load, and establishes a turbocharger system-load steady-state / transient matching energy flow analysis model, namely, a turbocharger system-load steady-state matching energy flow analysis model and a turbocharger system-load transient matching point migration model. Furthermore, considering the characteristics of the gas turbine-driven turbocharger system and the load's safe operating boundary, it deeply explores the turbocharger system-load steady-state matching characteristics, realizing steady-state operation range reconstruction and providing a decision-making basis for efficient operation under all operating conditions. Simultaneously, for transient scheduling actions, it summarizes the migration rules of operating points under various typical transient operating conditions, deeply explores the turbocharger system-load transient matching characteristics, realizing transient operation range reconstruction and providing a decision-making basis for safe operation under all operating conditions. This can be referred to here. Figures 3 to 6 As shown.

[0123] in, Figure 3 This diagram illustrates the steady-state energy flow characteristics output by the steady-state matching energy flow analysis model of the booster system-load provided in this embodiment. The steady-state energy flow characteristics involve the following aspects: unit energy input (corresponding energy flow component value: 6.2%), incoming energy transfer (corresponding energy flow component value: 93.8%), total energy input (corresponding energy flow component value: 100%), air cooler energy dissipation (corresponding energy flow component value: 2.3%), unit energy dissipation (corresponding energy flow component value: 0.9%), outgoing energy transfer (corresponding energy flow component value: 96.8%), transport steady-state dissipation (corresponding energy flow component value: 9.6%), and total energy output (corresponding energy flow component value: 87.2%), etc. Figure 3The energy flow component values ​​obtained from the energy flow analysis shown in the figure represent the system's energy input, output, and dissipation; where the length of the dark square represents the magnitude of the energy flow component, the light-colored connection represents the transmission relationship between energy flows, and the final conversion efficiency is the ratio between the total energy output and the total energy input.

[0124] Correspondingly, Figure 4 This diagram illustrates the steady-state operating domain determined using the reconstructing method for the operating domain of a gas turbine-driven supercharger system provided in this application embodiment. The steady-state operating domain is illustrated using the extracted supercharger system-load steady-state matching characteristics as an example, and the relationship between energy head and flow rate is a quadratic curve. The diagram uses energy head (m) and compressor flow rate (cubic meters / hour) as the horizontal and vertical axes to characterize this steady-state operating domain. Further reference is also provided. Figure 4 As shown, the upper and lower lines of this load characteristic represent the highest and lowest load outlet pressure curves, respectively. The line shown represents the difference between the upper pressure limit and 1 when the safety margin is 15% and the highest and lowest load outlet pressures are used. The line shown represents the difference between the lower pressure limit and 1 when the safety margin is 10% and the highest and lowest load outlet pressures are used.

[0125] at the same time, Figure 5 This diagram illustrates the transient energy flow characteristic analysis output by the transient matching point migration model of the booster system-load provided in this application embodiment. The transient energy flow characteristics (the migration law of the operating point under transient conditions) involve the following aspects: unit energy input (corresponding energy flow component value of 7.4%), inbound energy transfer (corresponding energy flow component value of 92.6%), total energy input (corresponding energy flow component value of 100%), air cooler energy dissipation (corresponding energy flow component value of 2.2%), unit steady-state dissipation (corresponding energy flow component value of 0.71%), delivery steady-state dissipation (corresponding energy flow component value of 7.1%), outbound energy transfer (corresponding energy flow component value of 96.5%), total energy output (corresponding energy flow component value of 88.0%), unit dynamic dissipation (corresponding energy flow component value of 0.59%), and delivery dynamic dissipation (corresponding energy flow component value of 1.4%), etc. It is relative to... Figure 3 In this regard, the increase includes: dynamic dissipation, such as: transmission dynamic dissipation and unit dynamic dissipation, etc. Similarly, Figure 5 The energy flow component values ​​obtained from the energy flow analysis shown in the figure represent the system's energy input, output, and dissipation; where the length of the dark square represents the magnitude of the energy flow component, the light-colored connection represents the transmission relationship between energy flows, and the final conversion efficiency is the ratio between the total energy output and the total energy input.

[0126] Correspondingly, Figure 6This is a schematic diagram of the transient operating domain determined in the reconstruction method of the operating domain of the gas turbine driven supercharging system provided in the embodiments of this application; wherein, the determination of the transient operating domain is shown by means of the supercharging system operating condition switching process under load constraints. Similarly, the energy head (m) and compressor flow rate (cubic meters / hour) are used as the horizontal and vertical axes of the schematic diagram to characterize the transient operating domain, that is, the time series value of the operating point (flow rate, energy head) under transient conditions is connected on the energy head-flow rate diagram. Figure 6 During the load increase process, the operating point shifts to the lower right. Therefore, in order to dynamically reserve margin, the steady-state matching boundary needs to shift to the upper left; the opposite is true during the load decrease process.

[0127] In summary, this application, building upon the shortcomings of traditional analytical methods for the efficient and safe operation of gas turbine-driven turbocharged systems, establishes a high-dynamic energy flow analysis model for steady-state / transient matching of the turbocharged system and its load by analyzing the energy input, output, conversion, and dissipation characteristics of the gas in the gas turbocharged transport system. This model enables the safe and efficient operation of the gas turbine-driven turbocharged system. Furthermore, by integrating the characteristics of the turbocharged system with the safe operating boundary of the load, the steady-state matching characteristics of the turbocharged system and its load are deeply explored, thereby reconstructing the steady-state operating range (domain) and providing a decision-making basis for efficient operation under all operating conditions. Simultaneously, for transient scheduling actions, especially high-dynamic processes such as start-up, shutdown, and rapid load changes, the migration patterns of operating points under various typical transient operating conditions are summarized, thereby deeply exploring the transient matching characteristics of the turbocharged system and its load, and reconstructing the transient operating range (domain) and providing a decision-making basis for safe operation under all operating conditions.

[0128] The following describes the method for reconstructing the operating domain of a gas turbine-driven supercharging system provided in the above-described embodiments of this application with reference to a specific example. However, it is worth noting that this specific example is only for better illustration of this application and does not constitute an improper limitation of this application.

[0129] Actual operating data from the West-East Gas Pipeline can be used to validate the steady-state and transient models of the booster system. The inlet flow rate, inlet temperature, inlet pressure, and speed of the units in the booster system are used as inputs to the models (booster system-load steady-state matching energy flow analysis model and booster system-load transient matching point migration model). The outlet pressure of the booster system is calculated and compared with the measured outlet pressure to verify the accuracy of the steady-state and transient models of the booster system. See also... Figure 7 The diagram shown illustrates the curve of the outlet pressure of the booster system changing over time. Figure 7The two lines in the figure represent the curve corresponding to the actual value and the curve corresponding to the simulated value, respectively. The curve corresponding to the simulated value is the dynamic change trajectory constructed by the reconstruction method of the operating domain of the gas turbine driven supercharging system provided in the embodiments of this application, and the pressure change over time curve formed by the proposed energy flow equation. See also... Figure 8 As shown, Figure 7 The diagram shows the relative error between the simulated and actual values. Figure 7 and Figure 8 It can be seen that the transient model matches the actual data trend very well and can adapt to the transient switching process of the booster system's operating point.

[0130] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0131] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0132] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods, such as: multiple units or components can be combined, or integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the various components shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be electrical, mechanical, or other forms.

[0133] The units described above as separate components may or may not be physically separate. The components shown as units may or may not be physical units. They may be located in one place or distributed across multiple network units. Some or all of the units may be selected to achieve the purpose of the embodiments of this application, depending on actual needs.

[0134] In addition, each functional unit in the various embodiments of this application can be integrated into one processing unit, or each unit can be a separate unit, or two or more units can be integrated into one unit; the integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0135] Alternatively, if the integrated units described above are implemented as software functional modules and sold or used as independent products, they can also be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the embodiments of this application, or the parts that contribute to related technologies, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause the device automatic test line to execute all or part of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as mobile storage devices, ROMs, magnetic disks, or optical disks.

[0136] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0137] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method or device embodiments.

[0138] The above description is merely an embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of reconfiguring an operating domain of a gas turbine driven supercharging system, characterized in that The method comprises: analyzing input characteristics, output characteristics, conversion characteristics and dissipation characteristics of gas in a gas pressurization transport system in which the gas turbine driven pressurization system is located, to obtain a pressurization system-load steady state matching energy flow analysis model and a pressurization system-load transient matching point migration model; wherein the gas pressurization transport system comprises: the gas turbine driven pressurization system, a gas transport pipeline and an air cooling system connected in sequence; the analyzing input characteristics, output characteristics, conversion characteristics and dissipation characteristics of gas in a gas pressurization transport system in which the gas turbine driven pressurization system is located, to obtain a pressurization system-load steady state matching energy flow analysis model and a pressurization system-load transient matching point migration model, comprises: substituting the input characteristics, the output characteristics, the conversion characteristics and the dissipation characteristics into gas thermodynamic equations and gas kinetic equations respectively for analysis, to obtain a load energy flow analysis equation of the gas transport pipeline, an air cooler energy flow analysis equation of the air cooling system and a pressurization system energy flow analysis equation of the gas turbine driven pressurization system; stably coupling the load energy flow analysis equation, the air cooler energy flow analysis equation and the pressurization system energy flow analysis equation to obtain the pressurization system-load steady state matching energy flow analysis model; transiently coupling the load energy flow analysis equation, the air cooler energy flow analysis equation and the pressurization system energy flow analysis equation to obtain the pressurization system-load transient matching point migration model; performing energy flow analysis on the pressurization system-load steady state matching energy flow analysis model to obtain pressurization system-load steady state energy flow characteristics, and performing simulation operation on the pressurization system-load transient matching point migration model to obtain a pressurization system-load operating point migration law under transient operating conditions; based on the pressurization system-load steady state energy flow characteristics, reconstructing a feasible operating domain of the pressurization system-load to obtain a steady state operating domain of the pressurization system-load; based on the pressurization system-load operating point migration law under transient operating conditions, reconstructing a feasible operating domain of the pressurization system-load to obtain a transient operating domain of the pressurization system-load.

2. The method of claim 1, wherein, The load energy flow analysis equation is: ； in, Inlet for gas transport pipelines Gas density at that location; For the outlet of gas transport pipelines Gas flow rate at the location; For the outlet of gas transport pipelines The entropy generated at that point It is a time variable; The control volume for gas input into the gas transport pipeline; This represents the pipeline distance increment for gas transport pipelines; For the outlet of gas transport pipelines Gas density at that location; This represents the increase in entropy generated by the gas in the gas transport pipeline; The coefficient of friction; This refers to the inner diameter of the gas transport pipeline; For the outlet of gas transport pipelines Local temperature at the location; The convective heat transfer coefficient between the gas and the ground within the gas transport pipeline; This is the inner circumference of the gas transport pipeline; The earth's temperature; Inlet for gas transport pipelines Gas flow rate at the location; For gas at the inlet of the gas transport pipeline enthalpy; For gas at the outlet of the gas transport pipeline Enthalpy at the location.

3. The method of claim 1, wherein, The air cooler energy flow analysis equation is: ； in, For the air cooler inlet Gas density at that location; For the outlet of the air cooler Gas flow rate at the location; For the outlet of the air cooler The entropy generated at that point It is a time variable; This represents the increment in the piping distance of the air cooler; This represents the increase in entropy generated by the gas in the air cooler; For the outlet of the air cooler Gas density at that location; The overall heat transfer coefficient of the air cooler; This is the inner circumference of the air cooler; This refers to the local temperature at the outlet of the air cooler. The earth's temperature; The control volume for gas input to the air cooler; For the air cooler inlet Gas flow rate at the location; For the gas at the inlet of the air cooler Enthalpy at the point; For the gas at the outlet of the air cooler Enthalpy at the location.

4. The method of claim 1, wherein, The pressurization system energy flow analysis equation is: ； wherein, is the density of the gas within the gas turbine driven supercharging system; is the angular velocity of the gas turbine driven supercharging system; is the local volume of the gas turbine driven supercharging system; is the gas flow through the gas turbine driven supercharging system; is the gas flow out of the gas turbine driven supercharging system; is the moment of inertia of the gas turbine driven supercharging system; is the input torque provided by the gas turbine driven supercharging system; is the efficiency; and is a constant parameter; is the flow velocity of the gas within the gas turbine driven supercharging system; is the enthalpy of the gas within the gas turbine driven supercharging system.

5. The method of claim 1, wherein, Before the reconstructing a feasible operating domain of the pressurization system-load based on the pressurization system-load steady state energy flow characteristics to obtain a steady state operating domain of the pressurization system-load, the method further comprises: obtaining a system characteristic curve of the gas turbine driven pressurization system and a load characteristic curve representing a load safe operating boundary in the gas pressurization transport system; integrating the system characteristic curve and the load characteristic curve to obtain a feasible operating domain of the pressurization system-load.

6. The method of claim 5, wherein, The system characteristic curve comprises: a surge boundary line, a choke boundary line, a minimum speed boundary line and a maximum speed boundary line.

7. The method according to claim 5 or 6, characterized in that, The integrating the system characteristic curve and the load characteristic curve to obtain a feasible operating domain of the pressurization system-load comprises: Obtaining the system characteristic curve and the load characteristic curve plotted on the same coordinate axis to obtain a characteristic diagram; According to the set load transport capacity and pressure level, adjusting the load characteristic curve in the characteristic diagram to a plurality of load curves; The area surrounded by the plurality of load curves and the system characteristic curve in the coordinate axis in the characteristic diagram is determined as the feasible operation domain of the supercharging system-load.

8. The method of claim 1, wherein, The feasible operation domain of the supercharging system-load is reconstructed based on the steady-state energy flow characteristics of the supercharging system-load to obtain the steady-state operation domain of the supercharging system-load, including: The feasible operation domain of the supercharging system-load is divided into efficiency level areas based on the steady-state energy flow characteristics of the supercharging system-load to obtain a plurality of efficiency level areas; The area corresponding to the highest efficiency level in the plurality of efficiency level areas is determined as the steady-state operation domain of the supercharging system-load.

9. The method of claim 1, wherein, The feasible operation domain of the supercharging system-load is reconstructed according to the operation point migration law under the transient working condition to obtain the transient operation domain of the supercharging system-load, including: The operation point migration law under the transient working condition is mapped to the feasible operation domain of the supercharging system-load to perform boundary distance calculation to obtain the maximum displacement of the operation point of the supercharging system-load under the transient working condition; The boundary of the feasible operation domain of the supercharging system-load is translated in the opposite direction by using the maximum displacement of the operation point of the supercharging system-load under the transient working condition to obtain the transient operation domain of the supercharging system-load.

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