Dynamic response solving method and device in frequency modulation process of photo-thermal power station and electronic equipment

Abstract

The invention provides a dynamic response solving method and device in the frequency modulation process of a photo-thermal power station and electronic equipment, and the method comprises the steps: calling a pre-constructed steam generator model of the photo-thermal power station, and enabling the steam generator model to be used for representing the representation relation of response parameters in different stages of the flowing process of a steam-water working medium, the response parameters at least comprise response parameters corresponding to the saturated water flow of the evaporator inlet; obtaining evaporator inlet saturated water flow of the photo-thermal power station; and based on the evaporator inlet saturated water flow and the steam generator model, main steam response parameters in the frequency modulation process of the photo-thermal power station are obtained, and the dynamic response in the frequency modulation process of the photo-thermal power station can be accurately quantified.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal system analysis, and in particular to a method, device and electronic equipment for solving dynamic responses during frequency modulation of a solar thermal power station. Background Art

[0002] With the accelerated transformation of the energy structure, the penetration of high-proportion renewable energy (such as wind power and photovoltaics) in the power system has increased significantly. However, their inherent intermittent and volatile characteristics pose a serious challenge to grid frequency stability. To address this challenge, flexible power sources with rapid adjustment capabilities have become a key supporting technology for the new power system. Concentrated solar power (CSP), as a clean and controllable power generation method, uses its built-in heat storage system to achieve flexible adjustment of power output, showing significant application potential in scenarios such as grid frequency regulation and peak load regulation.

[0003] However, evaluating the dynamic operating characteristics and frequency regulation performance of CSP plants still faces technical bottlenecks. Existing research has largely focused on steady-state modeling of CSP plants or dynamic analysis at the level of individual devices, lacking refined dynamic models that can fully reflect the energy conversion processes within the plant. This makes it difficult to accurately quantify the dynamic response characteristics of CSP plants when participating in grid frequency regulation, hindering their large-scale application in power systems.

[0004] Therefore, finding a dynamic response solution method that can accurately quantify the dynamic response during the frequency modulation process of a CSP plant has become a current research hotspot. Summary of the Invention

[0005] The present invention provides a method, device and electronic equipment for solving the dynamic response during the frequency modulation process of a solar thermal power station, which can accurately quantify the dynamic response during the frequency modulation process of a solar thermal power station.

[0006] The present invention provides a method for solving dynamic responses during a frequency modulation process of a solar thermal power station. The method comprises: calling a pre-constructed steam generator model of the solar thermal power station, wherein the steam generator model is used to characterize the relationship between response parameters at different stages of a steam-water working medium flow process, and the response parameters at least include a response parameter corresponding to a saturated water flow rate at an evaporator inlet; obtaining the saturated water flow rate at the evaporator inlet of the solar thermal power station; and obtaining a main steam response parameter during the frequency modulation process of the solar thermal power station based on the saturated water flow rate at the evaporator inlet and the steam generator model.

[0007] According to a method for solving dynamic responses in a frequency modulation process of a solar thermal power station provided by the present invention, the main steam response parameter includes a main steam temperature response parameter; the steam generator model includes a first temperature model in the phase change stage of the steam-water working medium flow process and a second temperature model in the superheating stage of the steam-water working medium flow process; the main steam response parameter in the frequency modulation process of the solar thermal power station is obtained based on the saturated water flow rate at the evaporator inlet and the steam generator model, specifically comprising: inputting the saturated water flow rate at the evaporator inlet into the first temperature model to obtain the steam-water working medium temperature output by the first temperature model; dividing the superheating stage of the steam-water working medium flow process into a preset number of sub-segments according to a preset step size, wherein the sub-segments include at least an initial sub-segment and a terminating sub-segment, the initial sub-segment being the starting sub-segment of the superheating stage of the steam-water working medium flow process; the terminating sub-segment being the terminating sub-segment of the superheating stage of the steam-water working medium flow process; and using the steam-water working medium temperature as the steam generator terminal temperature at the previous moment of the next sub-segment of the initial sub-segment. The steam-water working medium temperature at the end of the steam generator is inputted into the second temperature model at the previous moment of the next sub-segment of the initial sub-segment, and the steam-water working medium temperature at the starting end of the steam generator of the initial sub-segment at the current moment outputted by the second temperature model is obtained, and the steam-water working medium temperature at the starting end of the steam generator of the initial sub-segment at the current moment is used as the steam-water working medium temperature at the end of the steam generator of the next sub-segment at the previous moment of the next round, and the above process is repeated until the steam-water working medium temperature at the starting end of the steam generator of the terminating sub-segment at the current moment is obtained; based on the steam-water working medium temperature at the starting end of the steam generator of the terminating sub-segment at the current moment, the main steam temperature response parameter in the frequency modulation process of the solar thermal power station is obtained.

[0008] According to a method for solving dynamic responses during the frequency modulation process of a solar thermal power station provided by the present invention, the first temperature model is constructed in the following manner: based on the heat exchange parameters on the two-phase working medium side, the saturated water flow parameters at the evaporator inlet, the saturated steam flow parameters at the evaporator outlet, the specific enthalpy parameters of the saturated steam, the specific enthalpy parameters of the saturated water, and the saturated water volume parameters, a model for determining the saturation pressure of the steam-water two-phase working medium is constructed; based on the model for determining the saturation pressure of the steam-water two-phase working medium, the first temperature model is obtained.

[0009] According to a method for solving dynamic responses during the frequency modulation process of a solar thermal power station provided by the present invention, the second temperature model is constructed in the following manner: based on the metal wall temperature parameters of the steam generator at the previous moment, the steam-water working medium temperature parameters at the end of the steam generator at the previous moment, the heat transfer coefficient between the steam-water working medium and the metal wall, and the steam-water working medium flow rate heat capacity flow rate parameters of the steam generator at the previous moment, the second temperature model is constructed.

[0010] According to the method for solving dynamic response in the frequency modulation process of the photothermal power station, the main steam response parameter comprises a main steam pressure response parameter; the steam generator model comprises a first pressure model in a phase change stage of a steam-water working medium flow process and a second pressure model in a superheating stage of the steam-water working medium flow process; and the main steam response parameter in the frequency modulation process of the photothermal power station is obtained based on the evaporator inlet saturated water flow and the steam generator model, specifically comprising: inputting the evaporator inlet saturated water flow into the first pressure model to obtain saturated pressure of steam-water two-phase working medium output by the first pressure model; dividing the superheating stage of the steam-water working medium flow process into a preset number of subsegments according to a preset step, wherein the subsegments at least comprise an initial subsegment and a terminal subsegment, the initial subsegment is a starting subsegment of the superheating stage of the steam-water working medium flow process, and the terminal subsegment is a terminal subsegment of the superheating stage of the steam-water working medium flow process; taking the saturated pressure of the steam-water two-phase working medium as the steam generator initial-end steam-water working medium pressure at a current time of the initial subsegment; inputting the steam generator initial-end steam-water working medium pressure at the current time of the initial subsegment into the second pressure model to obtain steam generator terminal-end steam-water working medium pressure at a current time of a next subsegment of the initial subsegment, and taking the steam generator terminal-end steam-water working medium pressure at the current time of the next subsegment of the initial subsegment as steam generator initial-end steam-water working medium pressure at a previous time of a next subsegment of a next round, and repeating the foregoing process until the steam generator terminal-end steam-water working medium pressure at the current time of the terminal subsegment is obtained; and obtaining the main steam pressure response parameter in the frequency modulation process of the photothermal power station based on the steam generator terminal-end steam-water working medium pressure at the current time of the terminal subsegment.

[0011] According to the method for solving dynamic response in the frequency modulation process of the photothermal power station, the first pressure model is obtained by the following method: based on a heat exchange amount parameter of two-phase working medium, an evaporator inlet saturated water flow parameter, an evaporator outlet saturated steam flow parameter, a specific enthalpy parameter of saturated steam, a specific enthalpy parameter of saturated water, and a saturated water volume parameter, a model for determining saturated pressure of steam-water two-phase working medium is constructed, and the model for determining saturated pressure of steam-water two-phase working medium is taken as the first pressure model.

[0012] According to the method for solving dynamic response in the frequency modulation process of the photothermal power station, the second pressure model is obtained by the following method: based on a steam generator initial-end steam-water working medium pressure parameter at a current time, a steam generator terminal-end steam-water working medium pressure parameter at the current time, a water working medium resistance coefficient, a steam generator initial-end steam-water working medium flow parameter at the current time, and a steam generator steam-water working medium density at the current time, a second pressure model is constructed.

[0013] According to a method for solving the dynamic response during the frequency modulation process of a solar thermal power station provided by the present invention, the main steam response parameter includes a main steam flow response parameter; after obtaining the main steam pressure response parameter during the frequency modulation process of the solar thermal power station, the method further includes: obtaining the main steam valve opening and the valve flow coefficient; based on the main steam valve opening, the valve flow coefficient, and the main steam pressure response parameter during the frequency modulation process of the solar thermal power station, obtaining the main steam flow response parameter during the frequency modulation process of the solar thermal power station.

[0014] The present invention also provides a device for solving dynamic responses during the frequency modulation process of a solar thermal power station, the device comprising: a calling module for calling a pre-built steam generator model of a solar thermal power station, wherein the steam generator model is used to characterize the characterization relationship of response parameters at different stages of the steam-water working medium flow process, and the response parameters at least include response parameters corresponding to the saturated water flow rate at the evaporator inlet; an acquisition module for obtaining the saturated water flow rate at the evaporator inlet of the solar thermal power station; and a processing module for obtaining the main steam response parameters during the frequency modulation process of the solar thermal power station based on the saturated water flow rate at the evaporator inlet and the steam generator model.

[0015] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the method for solving the dynamic response during the frequency modulation of a solar thermal power station as described in any one of the above is implemented.

[0016] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for solving the dynamic response in the frequency modulation process of a solar thermal power station as described in any one of the above is implemented.

[0017] The present invention also provides a computer program product, comprising a computer program, which, when executed by a processor, implements any of the above-described methods for solving dynamic responses in the frequency modulation process of a solar thermal power station.

[0018] The present invention provides a method, device and electronic equipment for solving the dynamic response during the frequency modulation process of a solar thermal power station. The method calls a pre-built steam generator model of the solar thermal power station, wherein the steam generator model is used to characterize the characterization relationship of response parameters at different stages of the steam-water working medium flow process, and the response parameters at least include a response parameter corresponding to the saturated water flow rate at the evaporator inlet; the saturated water flow rate at the evaporator inlet of the solar thermal power station is obtained; based on the saturated water flow rate at the evaporator inlet and the steam generator model, the main steam response parameters during the frequency modulation process of the solar thermal power station are obtained. The present invention characterizes the characterization relationship of the response parameters at different stages of the steam-water working medium flow process based on the steam generator model, thereby meeting the power system's demand for refined frequency modulation simulation of the solar thermal power station. Based on the steam generator model, the method can accurately quantify the dynamic response during the frequency modulation process of the solar thermal power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is one of the flow charts of the method for solving the dynamic response in the frequency modulation process of a solar thermal power station provided by the present invention.

[0021] Figure 2 This is one of the flow charts provided by the present invention for obtaining the main steam response parameters during the frequency modulation process of the solar thermal power station based on the saturated water flow at the evaporator inlet and the steam generator model.

[0022] Figure 3 This is the second flow chart of the present invention for obtaining the main steam response parameters during the frequency modulation process of the solar thermal power station based on the saturated water flow at the evaporator inlet and the steam generator model.

[0023] Figure 4 This is the second flow chart of the method for solving the dynamic response in the frequency modulation process of a solar thermal power station provided by the present invention.

[0024] Figure 5 It is a structural schematic diagram of the dynamic response solving device during the frequency modulation process of the solar thermal power station provided by the present invention.

[0025] Figure 6 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0026] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0027] The method for solving the dynamic response during the frequency modulation process of a CSP power plant, provided by the present invention, uses a heat flow method based on mechanism analysis to establish a segmented steam generator model for the heat exchange process between molten salt and steam-water working fluids, focusing on the heat exchange and phase change processes of the steam-water working fluid. Given various thermodynamic coefficients and the initial thermodynamic state of the steam generator, the method uses input timing instructions such as the evaporator inlet saturated water flow rate and main steam valve opening to obtain dynamic results for the main steam pressure, flow rate, and temperature within that time period. This method provides an easily solved dynamic model for the steam generator of a tower CSP power plant, which can be used as a steam generator model in power simulations and accurately describes the dynamic response of the steam generator during the primary frequency modulation process of a tower CSP power plant.

[0028] Figure 1 This is one of the flow charts of the method for solving the dynamic response in the frequency modulation process of a solar thermal power station provided by the present invention.

[0029] The following will be combined Figure 1 The process of the method for solving the dynamic response during the frequency modulation process of a solar thermal power station provided by the present invention is described.

[0030] In an exemplary embodiment of the present invention, Figure 1 It can be seen that the method for solving the dynamic response during the frequency modulation process of a CSP power station may include steps 110 to 130, and each step will be described below.

[0031] In step 110, a pre-built steam generator model of a solar thermal power station is called, wherein the steam generator model is used to characterize the relationship between response parameters at different stages of the steam-water working medium flow process, and the response parameters at least include response parameters corresponding to the saturated water flow rate at the evaporator inlet.

[0032] In one embodiment, the CSP plant can be a tower-type CSP plant. During application, the steam generator of the tower-type CSP plant can be modeled. The main components of the model are the preheater, evaporator, and superheater, primarily considering the heat exchange, phase change, and flow processes of the steam-water working medium. In one example, the heat exchange and phase change processes of the steam-water working medium are divided into a preheating section, a phase change section, and a superheating section. Using the heat flow method, a segmented countercurrent heat exchanger model can be established to calculate the temperatures of the steam-water working medium, the metal wall, and the molten salt in each heat exchanger section.

[0033] In another embodiment, a steam generator model of a contemplated solar thermal power station may be called, wherein the steam generator model is used to characterize the relationship between response parameters at different stages of the steam-water working medium flow process, wherein the response parameters include at least response parameters corresponding to the saturated water flow rate at the evaporator inlet.

[0034] During the application process, the input model parameters include the specific heat capacity of molten salt, the heat transfer coefficient between molten salt and metal wall, the heat transfer coefficient between steam-water working fluid and metal wall, the steam-water working fluid resistance coefficient, and the valve flow coefficient; the input state quantity initial values ​​include the molten salt temperature, steam-water working fluid temperature, metal wall temperature, steam-water working fluid density, steam-water working fluid flow rate, and steam-water working fluid pressure of each section of the segmented heat exchanger model.

[0035] In step 120, the saturated water flow rate at the evaporator inlet of the CSP plant is obtained.

[0036] In step 130, based on the saturated water flow at the evaporator inlet and the steam generator model, the main steam response parameters during the frequency modulation process of the CSP power station are obtained.

[0037] In another embodiment, the saturated water flow rate at the evaporator inlet of a CSP plant can be obtained. Furthermore, this saturated water flow rate can be input into the corresponding parameters of the steam generator model to obtain the main steam response parameters during the CSP plant's frequency modulation process. Because the steam generator model accurately characterizes the response parameters at different stages of the steam-water working medium flow process, it can meet the power system's demand for refined frequency modulation simulation of CSP plants. Furthermore, the steam generator model can accurately quantify the dynamic response of the CSP plant during frequency modulation.

[0038] The present invention provides a method for solving the dynamic response during the frequency modulation process of a solar thermal power station. The method calls a pre-built steam generator model of the solar thermal power station, wherein the steam generator model is used to characterize the characterization relationship of response parameters at different stages of the steam-water working medium flow process, and the response parameters at least include a response parameter corresponding to the saturated water flow rate at the evaporator inlet; the saturated water flow rate at the evaporator inlet of the solar thermal power station is obtained; based on the saturated water flow rate at the evaporator inlet and the steam generator model, the main steam response parameters during the frequency modulation process of the solar thermal power station are obtained. The present invention characterizes the characterization relationship of the response parameters at different stages of the steam-water working medium flow process based on the steam generator model, thereby meeting the power system's demand for refined frequency modulation simulation of the solar thermal power station. Based on the steam generator model, the method can accurately quantify the dynamic response during the frequency modulation process of the solar thermal power station.

[0039] Figure 2 This is one of the flow charts provided by the present invention for obtaining the main steam response parameters during the frequency modulation process of the solar thermal power station based on the saturated water flow at the evaporator inlet and the steam generator model.

[0040] The application will be described in detail below Figure 2 The process of obtaining the main steam response parameter in the frequency modulation process of the solar thermal power station based on the evaporator inlet saturated water flow and the steam generator model will be described.

[0041] In an exemplary embodiment of the application, the main steam response parameter can include a main steam temperature response parameter; the steam generator model can include a first temperature model in the phase change stage of the steam-water flow process, a second temperature model in the superheating stage of the steam-water flow process; Wherein, obtaining the main steam response parameter in the frequency modulation process of the solar thermal power station based on the evaporator inlet saturated water flow and the steam generator model can include steps 210 to 250, which will be described below.

[0042] In step 210, the evaporator inlet saturated water flow is input into the first temperature model to obtain the steam-water temperature output by the first temperature model.

[0043] In an embodiment, the evaporator inlet saturated water flow can be input into the first temperature model, so that the steam-water temperature output by the first temperature model can be obtained. Wherein, the first temperature model can be considered as a temperature model involved in the phase change stage of the steam-water flow process.

[0044] The first temperature model can also be obtained by modeling, and the process of constructing the first temperature model will be described below in combination with the following embodiments.

[0045] In yet another exemplary embodiment of the application, the first temperature model can be constructed in the following way: Based on the heat transfer amount parameter of the two-phase working fluid side, the evaporator inlet saturated water flow parameter, the evaporator outlet saturated steam flow parameter, the specific enthalpy parameter of the saturated steam, the specific enthalpy parameter of the saturated water, and the saturated water volume parameter, a model for determining the saturated pressure of the steam-water two-phase working fluid is constructed; Based on the model for determining the saturated pressure of the steam-water two-phase working fluid, the first temperature model is obtained.

[0046] In an embodiment, the model for determining the saturated pressure of the steam-water two-phase working fluid can be determined by the following formula group (1): (1) Wherein, is the saturated pressure of the steam-water two-phase working fluid, and it can be understood that the model for determining the saturated pressure of the steam-water two-phase working fluid is a model for determining ; is the heat transfer amount transferred to the two-phase working fluid side (corresponding to the heat transfer amount parameter of the two-phase working fluid side); is saturated water flow rate at evaporator inlet (corresponding to saturated water flow rate at evaporator inlet parameter); is saturated vapor flow rate at evaporator outlet (corresponding to saturated vapor flow rate at evaporator outlet parameter); is specific enthalpy of saturated vapor (corresponding to specific enthalpy of saturated vapor parameter); is specific enthalpy of saturated water (corresponding to specific enthalpy of saturated water parameter); is saturated water volume (corresponding to saturated water volume parameter); is saturated vapor volume; is two-phase working medium volume; is saturated vapor density; is saturated water density; is saturated temperature of two-phase working medium; is effective metal coefficient; is specific heat capacity of metal; is metal mass; is approximate linear relationship of saturated water density with saturated pressure during primary frequency modulation; is approximate linear relationship of saturated water enthalpy value with saturated pressure during primary frequency modulation; is approximate linear relationship of saturated vapor density with saturated pressure during primary frequency modulation; is approximate linear relationship of saturated vapor enthalpy value with saturated pressure during primary frequency modulation; is approximate linear relationship of saturated temperature with saturated pressure during primary frequency modulation;D represents steam-water working medium flow rate;T s represents steam-water working medium temperature, and it can be understood that the first temperature model is a model for determining T s ; wherein subscript f in the parameter represents saturated water; subscript g in the parameter represents saturated vapor; subscript represents time; it should be noted that in the embodiment, the presence of subscript does not affect the physical meaning of the parameter; represents a functional relationship between saturated temperature of two-phase working medium and saturated pressure of two-phase working medium.

[0047] In step 220, the superheated stage of the steam-water working medium flow process is divided into a preset number of sub-stages according to a preset step size, wherein the sub-stages include at least an initial sub-stage and a terminal sub-stage, the initial sub-stage is the starting sub-stage of the superheated stage of the steam-water working medium flow process; and the terminal sub-stage is the terminal sub-stage of the superheated stage of the steam-water working medium flow process; In step 230, the steam-water working medium temperature is taken as the steam generator end steam-water working medium temperature at the previous time of the next sub-stage of the initial sub-stage; In step 240, the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the initial sub-segment is input into the second temperature model to obtain the steam-water working medium temperature at the beginning of the steam generator at the current moment of the initial sub-segment output by the second temperature model. The steam-water working medium temperature at the beginning of the steam generator at the current moment of the initial sub-segment is used as the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the next round. The above process is repeated until the steam-water working medium temperature at the beginning of the steam generator at the current moment of the terminating sub-segment is obtained. In step 250, based on the steam-water working medium temperature at the starting end of the steam generator at the current moment of the termination sub-segment, the main steam temperature response parameter during the frequency modulation process of the CSP power station is obtained.

[0048] In one embodiment, the superheating stage of the steam-water working medium flow process can be divided into a preset number of sub-segments according to a preset step size, wherein the sub-segments include at least an initial sub-segment and a terminal sub-segment, the initial sub-segment is the starting sub-segment of the superheating stage of the steam-water working medium flow process; the terminal sub-segment is the terminal sub-segment of the superheating stage of the steam-water working medium flow process.

[0049] Furthermore, the steam-water working medium temperature is used as the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the initial sub-segment. The steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the initial sub-segment is then input into the second temperature model to obtain the steam-water working medium temperature at the beginning of the steam generator at the current moment of the initial sub-segment output by the second temperature model. The steam-water working medium temperature at the beginning of the steam generator at the current moment of the initial sub-segment is then used as the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the next round. The aforementioned process is repeated until the steam-water working medium temperature at the beginning of the steam generator at the current moment of the terminating sub-segment is obtained.

[0050] In other words, the steam-water working medium temperature at the end of the steam generator of each sub-segment at the previous moment is calculated respectively, and based on the steam-water working medium temperature at the end of the steam generator of each sub-segment at the previous moment, the steam-water working medium temperature at the beginning of the steam generator of the previous sub-segment at the current moment is calculated, until the steam-water working medium temperature at the beginning of the steam generator of the terminating sub-segment at the current moment is obtained, and the steam-water working medium temperature at the beginning of the steam generator of the terminating sub-segment at the current moment is used as the main steam temperature response parameter in the frequency modulation process of the solar thermal power station.

[0051] The second temperature model can be considered as a temperature model involved in the superheating stage of the steam-water working medium flow process. The process of constructing the second temperature model will be described below.

[0052] In another exemplary embodiment of the present invention, the second temperature model can be constructed in the following manner: A second temperature model is constructed based on the steam generator metal wall temperature parameters at the previous moment, the steam-water working medium temperature parameters at the steam generator end at the previous moment, the heat transfer coefficient between the steam-water working medium and the metal wall, and the steam-water working medium flow heat capacity flow parameters of the steam generator at the previous moment.

[0053] In one embodiment, the second temperature model can be expressed using the following formula group (2): (2) in, is the steam-water working medium temperature at the beginning of the j-segment steam generator model at the current moment; is the metal wall temperature of the steam generator model of segment j at the previous moment (corresponding to the metal wall temperature parameter of the steam generator at the previous moment); is the steam-water working medium temperature at the end of the j+1-stage steam generator model at the previous moment (corresponding to the steam-water working medium temperature parameter at the end of the steam generator at the previous moment); is the heat transfer coefficient between steam-water medium and metal wall; is the steam-water working medium flow rate heat capacity flow rate of the steam generator model of segment j at the previous moment (corresponding to the steam-water working medium flow rate heat capacity flow rate parameter of the steam generator at the previous moment), and is numerically taken as the product of the steam-water working medium flow rate and the specific heat capacity; is the terminal molten salt temperature of the steam generator model at the current moment (j+1); is the molten salt temperature at the beginning of the j-segment steam generator model at the previous moment; is the heat transfer coefficient between molten salt and metal wall; It is the molten salt flow rate and heat capacity flow rate of the steam generator model at the previous moment, and the numerical value is the product of the molten salt flow rate and the specific heat capacity.

[0054] The j-segment steam generator model can be considered as dividing the superheating stage of the steam-water working medium flow process into the j-th segment of a preset number of sub-segments according to a preset step size. It can be understood that if the j-segment is the initial sub-segment, The steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment corresponding to the initial sub-segment; It can correspond to the steam-water working medium temperature at the beginning of the steam generator at the current moment of the initial sub-segment. It can be understood that the second temperature model is to determine model.

[0055] Figure 3 This is the second flow chart of the present invention for obtaining the main steam response parameters during the frequency modulation process of the solar thermal power station based on the saturated water flow at the evaporator inlet and the steam generator model.

[0056] The following will be combined Figure 3The process of obtaining the main steam response parameters during the frequency modulation of the CSP power station based on the saturated water flow at the evaporator inlet and the steam generator model is described.

[0057] In an exemplary embodiment of the present invention, the main steam response parameter may include a main steam pressure response parameter; the steam generator model may include a first pressure model in a phase change stage of a steam-water working medium flow process, and a second pressure model in a superheating stage of a steam-water working medium flow process; Among them, combined Figure 3 It can be seen that based on the saturated water flow at the evaporator inlet and the steam generator model, the main steam response parameters in the frequency modulation process of the CSP power station are obtained, which can include steps 310 to 350. Each step will be introduced below.

[0058] In step 310, the saturated water flow rate at the evaporator inlet is input into the first pressure model to obtain the saturated pressure of the steam-water two-phase working medium output by the first pressure model.

[0059] In one embodiment, the saturated water flow rate at the evaporator inlet can be input into the first pressure model to obtain the saturated pressure of the steam-water two-phase working medium output by the first pressure model. The first pressure model can be considered as the pressure model involved in the phase change stage of the steam-water working medium flow process.

[0060] The first pressure model can also be constructed by modeling. The process of constructing the first pressure model will be described below in conjunction with the following embodiments.

[0061] In another exemplary embodiment of the present invention, the first pressure model can be constructed in the following manner: Based on the heat exchange parameters on the two-phase working medium side, the saturated water flow parameters of the evaporator inlet, the saturated steam flow parameters of the evaporator outlet, the specific enthalpy parameters of the saturated steam, the specific enthalpy parameters of the saturated water, and the saturated water volume parameters, a model for determining the saturation pressure of the steam-water two-phase working medium is constructed, and the model for determining the saturation pressure of the steam-water two-phase working medium is used as the first pressure model.

[0062] In one embodiment, the model for determining the saturation pressure of the steam-water two-phase working medium can be determined using the aforementioned formula group (1). Furthermore, the model for determining the saturation pressure of the steam-water two-phase working medium can be directly used as the first pressure model.

[0063] In step 320, the superheating stage of the steam-water working medium flow process is divided into a preset number of sub-segments according to a preset step size, wherein the sub-segments include at least an initial sub-segment and a terminal sub-segment, the initial sub-segment being the starting sub-segment of the superheating stage of the steam-water working medium flow process; and the terminal sub-segment being the terminal sub-segment of the superheating stage of the steam-water working medium flow process.

[0064] In step 330 , the saturated pressure of the steam-water two-phase working medium is used as the steam-water working medium pressure at the starting end of the steam generator at the current moment of the initial sub-segment.

[0065] In step 340, the steam-water working medium pressure at the starting end of the steam generator of the initial sub-segment at the current moment is input into the second pressure model to obtain the steam-water working medium pressure at the end of the steam generator of the next sub-segment of the initial sub-segment at the current moment output by the second pressure model, and the steam-water working medium pressure at the end of the steam generator of the next sub-segment of the initial sub-segment at the current moment is used as the steam-water working medium temperature at the starting end of the steam generator of the next sub-segment of the next round at the previous moment, and the above process is repeated until the steam-water working medium pressure at the end of the steam generator of the terminating sub-segment at the current moment is obtained.

[0066] In step 350, based on the steam-water working medium pressure at the end of the steam generator at the current moment of the termination sub-segment, the main steam pressure response parameter during the frequency modulation process of the CSP power station is obtained.

[0067] In one embodiment, the saturated water flow rate at the evaporator inlet can be input into the first pressure model to obtain the steam-water working medium temperature output by the first pressure model. The first temperature model can be considered as a temperature model involved in the phase change phase of the steam-water working medium flow process.

[0068] In one embodiment, the superheating stage of the steam-water working medium flow process can be divided into a preset number of sub-segments according to a preset step size, wherein the sub-segments include at least an initial sub-segment and a terminal sub-segment, the initial sub-segment is the starting sub-segment of the superheating stage of the steam-water working medium flow process; the terminal sub-segment is the terminal sub-segment of the superheating stage of the steam-water working medium flow process.

[0069] Furthermore, the saturated pressure of the steam-water two-phase working medium is used as the steam-water working medium pressure at the steam generator start point at the current moment of the initial sub-segment. The steam-water working medium pressure at the steam generator start point at the current moment of the initial sub-segment is then input into the second pressure model to obtain the steam-water working medium pressure at the steam generator end point at the current moment of the next sub-segment after the initial sub-segment, as output by the second pressure model. The steam-water working medium pressure at the steam generator end point at the current moment of the next sub-segment after the initial sub-segment is then used as the steam-water working medium temperature at the steam generator start point at the previous moment of the next sub-segment after the next round. The aforementioned process is repeated until the steam-water working medium pressure at the steam generator end point at the current moment of the final sub-segment is obtained.

[0070] In other words, the steam-water working fluid pressure at the starting end of the steam generator of each sub-segment at the current moment is calculated respectively, and based on the steam-water working fluid pressure at the starting end of the steam generator of each sub-segment at the current moment, the steam-water working fluid pressure at the end of the steam generator of the next sub-segment at the current moment is calculated, until the steam-water working fluid pressure at the end of the steam generator of the terminating sub-segment at the current moment is obtained, and the steam-water working fluid pressure at the end of the steam generator of the terminating sub-segment at the current moment is used as the main steam pressure response parameter in the frequency modulation process of the solar thermal power station.

[0071] The second pressure model can be considered as the pressure model involved in the superheating stage of the steam-water working medium flow process. The process of constructing the second pressure model will be introduced below.

[0072] In another exemplary embodiment of the present invention, the second pressure model can be constructed in the following manner: A second pressure model is constructed based on the steam-water working medium pressure parameters at the starting end of the steam generator at the previous moment, the steam-water working medium pressure parameters at the end of the steam generator at the current moment, the water working medium resistance coefficient, the steam-water working medium flow parameters at the starting end of the steam generator at the current moment, and the steam-water working medium density of the steam generator at the current moment.

[0073] In one embodiment, the second pressure model can be expressed using the following formulas (3)-(4): (3) (4) in, is the steam-water working medium pressure at the beginning of the j-segment steam generator model at the current moment (corresponding to the steam-water working medium pressure parameter at the beginning of the steam generator at the current moment); is the steam-water working medium pressure at the end of the j-segment steam generator model at the current moment (corresponding to the steam-water working medium pressure parameter at the end of the steam generator at the current moment); is the resistance coefficient of steam-water working medium; is the steam-water working medium flow rate at the beginning of the j-segment steam generator model at the current moment (corresponding to the steam-water working medium flow rate parameter at the beginning of the steam generator at the current moment); is the steam-water working medium density of the j-segment steam generator model at the current moment (corresponding to the steam-water working medium density of the steam generator at the current moment).

[0074] in, is the steam-water working medium density of the j-segment steam generator model at the current moment, which can be understood as ; is the steam-water working medium density of the j-segment steam generator model at the previous moment; is the steam-water working medium flow rate at the end of the j-segment steam generator model at the current moment; is the steam-water working medium flow rate at the beginning of the j-segment steam generator model at the current moment; is the internal volume of each steam generator model; The time interval between the previous moment and the current moment.

[0075] Figure 4 This is the second flow chart of the method for solving the dynamic response in the frequency modulation process of a solar thermal power station provided by the present invention.

[0076] The following will be combined Figure 4 The process of solving another method for dynamic response in the frequency modulation process of a CSP power station is explained.

[0077] In an exemplary embodiment of the present invention, the main steam response parameter may include a main steam flow response parameter; Figure 4 It can be seen that after obtaining the main steam pressure response parameters during the frequency regulation process of the CSP plant, the method for solving the dynamic response during the frequency regulation process of the CSP plant can further include steps 410 and 420. Each step will be described below: In step 410, the main steam valve opening and valve flow coefficient are obtained; In step 420, based on the main steam valve opening, the valve flow coefficient, and the main steam pressure response parameter during the frequency modulation of the CSP plant, the main steam flow response parameter during the frequency modulation of the CSP plant is obtained.

[0078] In one embodiment, the main steam flow response parameter during the frequency regulation process of the thermal power station can be realized using the following formula (5): (5) in, is the steam-water working medium flow rate at the beginning of the steam generator model at the current moment; is the valve flow coefficient; is the main steam valve opening of the steam generator model at the current moment (corresponding to the main steam valve opening); is the steam-water working medium pressure at the beginning of the steam generator model at the current moment, where This corresponds to the main steam pressure response parameter determined in the frequency regulation process of the CSP plant previously.

[0079] According to the foregoing description, the present invention provides a method for solving the dynamic response during the frequency modulation process of a solar thermal power station, calling a pre-built steam generator model of a solar thermal power station, wherein the steam generator model is used to characterize the characterization relationship of response parameters at different stages of the steam-water working medium flow process, and the response parameters at least include a response parameter corresponding to the saturated water flow rate at the evaporator inlet; the saturated water flow rate at the evaporator inlet of the solar thermal power station is obtained; based on the saturated water flow rate at the evaporator inlet and the steam generator model, the main steam response parameters during the frequency modulation process of the solar thermal power station are obtained. The present invention characterizes the characterization relationship of response parameters at different stages of the steam-water working medium flow process based on the steam generator model, thereby meeting the power system's demand for refined frequency modulation simulation of solar thermal power stations, and based on the steam generator model, the dynamic response during the frequency modulation process of the solar thermal power station can be accurately quantified.

[0080] The following describes the dynamic response solving device during the frequency modulation process of a solar thermal power station provided by the present invention. The dynamic response solving device during the frequency modulation process of a solar thermal power station described below and the dynamic response solving method during the frequency modulation process of a solar thermal power station described above can be referred to each other.

[0081] Figure 5 It is a structural schematic diagram of the dynamic response solving device during the frequency modulation process of the solar thermal power station provided by the present invention.

[0082] The following will be combined Figure 5 The structure of the dynamic response solving device during the frequency modulation process of a solar thermal power station provided by the present invention is described.

[0083] In an exemplary embodiment of the present invention, Figure 5 It can be seen that the dynamic response solving device during the frequency modulation process of the CSP power station may include a calling module 510, an acquisition module 520, and a processing module 530. Each module will be introduced below.

[0084] The calling module 510 may be configured to call a pre-built steam generator model of a CSP plant, wherein the steam generator model is used to characterize the relationship between response parameters at different stages of a steam-water working medium flow process, wherein the response parameters include at least a response parameter corresponding to a saturated water flow rate at an evaporator inlet; The acquisition module 520 may be configured to acquire the saturated water flow rate at the evaporator inlet of the CSP plant; The processing module 530 may be configured to obtain main steam response parameters during the frequency modulation process of the CSP plant based on the saturated water flow at the evaporator inlet and the steam generator model.

[0085] In an exemplary embodiment of the present invention, the main steam response parameter includes a main steam temperature response parameter; the steam generator model includes a first temperature model in a phase change stage of a steam-water working medium flow process, and a second temperature model in a superheating stage of a steam-water working medium flow process; The processing module 530 can obtain the main steam response parameters during the frequency modulation process of the CSP plant based on the saturated water flow at the evaporator inlet and the steam generator model in the following manner: Inputting the saturated water flow rate at the evaporator inlet into the first temperature model to obtain the steam-water working medium temperature output by the first temperature model; Dividing the superheating stage of the steam-water working medium flow process into a preset number of sub-segments according to a preset step size, wherein the sub-segments include at least an initial sub-segment and a terminal sub-segment, the initial sub-segment being the starting sub-segment of the superheating stage of the steam-water working medium flow process; and the terminal sub-segment being the terminal sub-segment of the superheating stage of the steam-water working medium flow process; The steam-water working medium temperature is used as the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the initial sub-segment; Inputting the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the initial sub-segment into the second temperature model, obtaining the steam-water working medium temperature at the starting end of the steam generator at the current moment of the initial sub-segment output by the second temperature model, and using the steam-water working medium temperature at the starting end of the steam generator at the current moment of the initial sub-segment as the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the next round, and repeating the above process until the steam-water working medium temperature at the starting end of the steam generator at the current moment of the terminating sub-segment is obtained; Based on the steam-water working medium temperature at the starting end of the steam generator at the current moment of the terminator segment, the main steam temperature response parameter in the frequency modulation process of the solar thermal power station is obtained.

[0086] In an exemplary embodiment of the present invention, the processing module 530 may construct the first temperature model in the following manner: Based on the heat exchange parameters of the two-phase working medium, the saturated water flow rate parameters at the evaporator inlet, the saturated steam flow rate parameters at the evaporator outlet, the specific enthalpy parameters of the saturated steam, the specific enthalpy parameters of the saturated water, and the saturated water volume parameters, a model for determining the saturation pressure of the steam-water two-phase working medium is constructed. The first temperature model is obtained based on the model for determining the saturation pressure of the steam-water two-phase working medium.

[0087] In an exemplary embodiment of the present invention, the processing module 530 may construct the second temperature model in the following manner: The second temperature model is constructed based on the steam generator metal wall temperature parameters at the previous moment, the steam-water working medium temperature parameters at the end of the steam generator at the previous moment, the heat transfer coefficient between the steam-water working medium and the metal wall, and the steam-water working medium flow heat capacity flow parameters of the steam generator at the previous moment.

[0088] In an exemplary embodiment of the present invention, the main steam response parameter includes a main steam pressure response parameter; the steam generator model includes a first pressure model in a phase change stage of a steam-water working medium flow process, and a second pressure model in a superheating stage of a steam-water working medium flow process; The processing module 530 can obtain the main steam response parameters during the frequency modulation process of the CSP plant based on the saturated water flow at the evaporator inlet and the steam generator model in the following manner: Inputting the saturated water flow rate of the evaporator inlet into the first pressure model to obtain the saturated pressure of the steam-water two-phase working medium output by the first pressure model; Dividing the superheating stage of the steam-water working medium flow process into a preset number of sub-segments according to a preset step size, wherein the sub-segments include at least an initial sub-segment and a terminal sub-segment, the initial sub-segment being the starting sub-segment of the superheating stage of the steam-water working medium flow process; and the terminal sub-segment being the terminal sub-segment of the superheating stage of the steam-water working medium flow process; The saturated pressure of the steam-water two-phase working medium is used as the steam-water working medium pressure at the starting end of the steam generator at the current moment of the initial sub-segment; Inputting the steam-water working medium pressure at the starting end of the steam generator of the initial sub-segment at the current moment into the second pressure model, obtaining the steam-water working medium pressure at the ending end of the steam generator of the next sub-segment of the initial sub-segment at the current moment output by the second pressure model, and using the steam-water working medium pressure at the ending end of the steam generator of the next sub-segment of the initial sub-segment at the current moment as the steam-water working medium temperature at the starting end of the steam generator of the next sub-segment at the previous moment in the next round, and repeating the aforementioned process until obtaining the steam-water working medium pressure at the ending end of the steam generator of the terminating sub-segment at the current moment; Based on the steam-water working medium pressure at the end of the steam generator at the current moment of the terminator segment, the main steam pressure response parameter in the frequency modulation process of the solar thermal power station is obtained.

[0089] In an exemplary embodiment of the present invention, the processing module 530 may construct the first pressure model in the following manner: Based on the heat exchange parameters on the two-phase working medium side, the saturated water flow parameters of the evaporator inlet, the saturated steam flow parameters of the evaporator outlet, the specific enthalpy parameters of the saturated steam, the specific enthalpy parameters of the saturated water, and the saturated water volume parameters, a model for determining the saturation pressure of the steam-water two-phase working medium is constructed, and the model for determining the saturation pressure of the steam-water two-phase working medium is used as the first pressure model.

[0090] In an exemplary embodiment of the present invention, the processing module 530 may construct the second pressure model in the following manner: A second pressure model is constructed based on the steam-water working medium pressure parameters at the starting end of the steam generator at the current moment, the steam-water working medium pressure parameters at the end of the steam generator at the current moment, the water working medium resistance coefficient, the steam-water working medium flow parameters at the starting end of the steam generator at the current moment, and the steam-water working medium density of the steam generator at the current moment.

[0091] In an exemplary embodiment of the present invention, the main steam response parameter includes a main steam flow response parameter; the processing module 530 may also be configured to: Obtain the main steam valve opening and valve flow coefficient; Based on the main steam valve opening, the valve flow coefficient, and the main steam pressure response parameter during the frequency modulation process of the solar thermal power station, the main steam flow response parameter during the frequency modulation process of the solar thermal power station is obtained.

[0092] Figure 6 An example of a physical structure diagram of an electronic device is shown below. Figure 6 As shown, the electronic device may include: a processor 610, a communications interface 620, a memory 630, and a communications bus 640, wherein the processor 610, the communications interface 620, and the memory 630 communicate with each other via the communications bus 640. The processor 610 may call logic instructions in the memory 630 to execute a dynamic response solution method during the frequency modulation process of a CSP plant. The method includes: calling a pre-built steam generator model of a CSP plant, wherein the steam generator model is used to characterize the relationship between response parameters at different stages of the steam-water working medium flow process, wherein the response parameters include at least a response parameter corresponding to the saturated water flow rate at the evaporator inlet; obtaining the saturated water flow rate at the evaporator inlet of the CSP plant; and obtaining the main steam response parameter during the frequency modulation process of the CSP plant based on the saturated water flow rate at the evaporator inlet and the steam generator model.

[0093] Furthermore, the logic instructions in the aforementioned memory 630 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0094] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the dynamic response solution method during the frequency modulation process of the solar thermal power station provided by the above-mentioned methods. The method includes: calling a pre-built steam generator model of the solar thermal power station, wherein the steam generator model is used to characterize the characterization relationship of response parameters at different stages of the steam-water working medium flow process, and the response parameters at least include response parameters corresponding to the saturated water flow rate at the evaporator inlet; obtaining the saturated water flow rate at the evaporator inlet of the solar thermal power station; based on the saturated water flow rate at the evaporator inlet and the steam generator model, obtaining the main steam response parameters during the frequency modulation process of the solar thermal power station.

[0095] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the dynamic response solution method during the frequency modulation process of a solar thermal power station provided by the above-mentioned methods, the method comprising: calling a pre-built steam generator model of a solar thermal power station, wherein the steam generator model is used to characterize the characterization relationship of response parameters at different stages of the steam-water working medium flow process, and the response parameters at least include response parameters corresponding to the saturated water flow rate at the evaporator inlet; obtaining the saturated water flow rate at the evaporator inlet of the solar thermal power station; and obtaining the main steam response parameters during the frequency modulation process of the solar thermal power station based on the saturated water flow rate at the evaporator inlet and the steam generator model.

[0096] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0097] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0098] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for solving dynamic response in the frequency modulation process of a solar thermal power station, characterized in that: The method comprises: Invoking a pre-built steam generator model of a CSP plant, wherein the steam generator model is used to characterize the relationship between response parameters at different stages of a steam-water working medium flow process, wherein the response parameters at least include a response parameter corresponding to a saturated water flow rate at an evaporator inlet; Obtaining the saturated water flow rate at the evaporator inlet of the solar thermal power station; Based on the saturated water flow rate at the evaporator inlet and the steam generator model, main steam response parameters during the frequency modulation process of the solar thermal power station are obtained.

2. The method for solving dynamic response in the frequency modulation process of a CSP plant according to claim 1, characterized in that: The main steam response parameter includes a main steam temperature response parameter; the steam generator model includes a first temperature model in the phase change stage of the steam-water working medium flow process and a second temperature model in the superheat stage of the steam-water working medium flow process; The main steam response parameters during the frequency modulation process of the CSP power station are obtained based on the saturated water flow at the evaporator inlet and the steam generator model, specifically including: Inputting the saturated water flow rate at the evaporator inlet into the first temperature model to obtain the steam-water working medium temperature output by the first temperature model; Dividing the superheating stage of the steam-water working medium flow process into a preset number of sub-segments according to a preset step size, wherein the sub-segments include at least an initial sub-segment and a terminal sub-segment, the initial sub-segment being the starting sub-segment of the superheating stage of the steam-water working medium flow process; and the terminal sub-segment being the terminal sub-segment of the superheating stage of the steam-water working medium flow process; The steam-water working medium temperature is used as the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the initial sub-segment; Inputting the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the initial sub-segment into the second temperature model, obtaining the steam-water working medium temperature at the starting end of the steam generator at the current moment of the initial sub-segment output by the second temperature model, and using the steam-water working medium temperature at the starting end of the steam generator at the current moment of the initial sub-segment as the steam-water working medium temperature at the end of the steam generator at the previous moment of the next sub-segment of the next round, and repeating the above process until the steam-water working medium temperature at the starting end of the steam generator at the current moment of the terminating sub-segment is obtained; Based on the steam-water working medium temperature at the starting end of the steam generator at the current moment of the terminator segment, the main steam temperature response parameter in the frequency modulation process of the solar thermal power station is obtained.

3. The method for solving dynamic response in the frequency modulation process of a CSP plant according to claim 2, characterized in that: The first temperature model is constructed in the following way: Based on the heat exchange parameters of the two-phase working medium, the saturated water flow rate parameters at the evaporator inlet, the saturated steam flow rate parameters at the evaporator outlet, the specific enthalpy parameters of the saturated steam, the specific enthalpy parameters of the saturated water, and the saturated water volume parameters, a model for determining the saturation pressure of the steam-water two-phase working medium is constructed. The first temperature model is obtained based on the model for determining the saturation pressure of the steam-water two-phase working medium.

4. The method for solving dynamic response in the frequency modulation process of a CSP plant according to claim 2, characterized in that: The second temperature model is constructed in the following way: The second temperature model is constructed based on the steam generator metal wall temperature parameters at the previous moment, the steam-water working medium temperature parameters at the end of the steam generator at the previous moment, the heat transfer coefficient between the steam-water working medium and the metal wall, and the steam-water working medium flow heat capacity flow parameters of the steam generator at the previous moment.

5. The method for solving dynamic response in the frequency modulation process of a CSP plant according to claim 1, characterized in that: The main steam response parameter includes a main steam pressure response parameter; the steam generator model includes a first pressure model in the phase change stage of the steam-water working medium flow process and a second pressure model in the superheat stage of the steam-water working medium flow process; The main steam response parameters during the frequency modulation process of the CSP power station are obtained based on the saturated water flow at the evaporator inlet and the steam generator model, specifically including: Inputting the saturated water flow rate of the evaporator inlet into the first pressure model to obtain the saturated pressure of the steam-water two-phase working medium output by the first pressure model; Dividing the superheating stage of the steam-water working medium flow process into a preset number of sub-segments according to a preset step size, wherein the sub-segments include at least an initial sub-segment and a terminal sub-segment, the initial sub-segment being the starting sub-segment of the superheating stage of the steam-water working medium flow process; and the terminal sub-segment being the terminal sub-segment of the superheating stage of the steam-water working medium flow process; The saturated pressure of the steam-water two-phase working medium is used as the steam-water working medium pressure at the starting end of the steam generator at the current moment of the initial sub-segment; Inputting the steam-water working medium pressure at the starting end of the steam generator of the initial sub-segment at the current moment into the second pressure model, obtaining the steam-water working medium pressure at the ending end of the steam generator of the next sub-segment of the initial sub-segment at the current moment output by the second pressure model, and using the steam-water working medium pressure at the ending end of the steam generator of the next sub-segment of the initial sub-segment at the current moment as the steam-water working medium temperature at the starting end of the steam generator of the next sub-segment at the previous moment in the next round, and repeating the aforementioned process until obtaining the steam-water working medium pressure at the ending end of the steam generator of the terminating sub-segment at the current moment; Based on the steam-water working medium pressure at the end of the steam generator at the current moment of the terminator segment, the main steam pressure response parameter in the frequency modulation process of the solar thermal power station is obtained.

6. The method for solving dynamic response in the frequency modulation process of a CSP plant according to claim 5, characterized in that: The first pressure model is constructed in the following way: Based on the heat exchange parameters on the two-phase working medium side, the saturated water flow parameters of the evaporator inlet, the saturated steam flow parameters of the evaporator outlet, the specific enthalpy parameters of the saturated steam, the specific enthalpy parameters of the saturated water, and the saturated water volume parameters, a model for determining the saturation pressure of the steam-water two-phase working medium is constructed, and the model for determining the saturation pressure of the steam-water two-phase working medium is used as the first pressure model.

7. The method for solving dynamic response in the frequency modulation process of a CSP plant according to claim 5, characterized in that: The second pressure model is constructed in the following way: A second pressure model is constructed based on the steam-water working medium pressure parameters at the starting end of the steam generator at the current moment, the steam-water working medium pressure parameters at the end of the steam generator at the current moment, the water working medium resistance coefficient, the steam-water working medium flow parameters at the starting end of the steam generator at the current moment, and the steam-water working medium density of the steam generator at the current moment.

8. The method for solving dynamic response in the frequency modulation process of a CSP plant according to claim 5, characterized in that: The main steam response parameter includes a main steam flow response parameter; After obtaining the main steam pressure response parameter during the frequency modulation process of the CSP power station, the method further includes: Obtain the main steam valve opening and valve flow coefficient; Based on the main steam valve opening, the valve flow coefficient, and the main steam pressure response parameter during the frequency modulation process of the solar thermal power station, the main steam flow response parameter during the frequency modulation process of the solar thermal power station is obtained.

9. A device for solving dynamic response in the frequency modulation process of a solar thermal power station, characterized in that: The device comprises: A calling module is used to call a pre-built steam generator model of a solar thermal power station, wherein the steam generator model is used to characterize the relationship between response parameters at different stages of the steam-water working medium flow process, and the response parameters at least include a response parameter corresponding to the saturated water flow rate at the evaporator inlet; An acquisition module, configured to acquire the saturated water flow rate at the evaporator inlet of the solar thermal power station; A processing module is used to obtain the main steam response parameters during the frequency modulation process of the solar thermal power station based on the saturated water flow at the evaporator inlet and the steam generator model.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method for solving the dynamic response in the frequency modulation process of a solar thermal power station according to any one of claims 1 to 8 is implemented.

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