Pressure control method for hydrogen supply device of hydrogen turbine engine and storage medium

Abstract

The invention provides a pressure control method for a hydrogen supply device of a hydrogen turbine engine and a storage medium. The method comprises the following steps: calculating model parameters in a current control period according to equipment parameters of a hydrogen supply system in the current control period, and estimating unknown parameters and system state parameters in the current control period; calculating the control quantity of the hydrogen supply system in the next control period according to the model parameters, the unknown parameters and the system state parameters in the current control period; according to the estimated system state parameters of the hydrogen supply system in the current control period, the rotating speed correction amount of the hydrogen supply system in the next control period is calculated; and performing feedback control on the hydrogen supply system by utilizing the control quantity and the rotating speed correction quantity of the pump in the hydrogen supply system in the next control period. The pressure fluctuation caused by strong disturbance can be effectively inhibited, the control precision of the hydrogen supply pressure and the system stability are remarkably improved, and the strict requirement of a hydrogen turbine engine for a high-pressure hydrogen supply system is met.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a pressure control method and storage medium for a hydrogen supply device for a hydrogen turbine engine. Background Technology

[0002] The hydrogen supply system provides a precise flow of hydrogen to the hydrogen turbine engine, ensuring its safe and stable operation. The structure of the hydrogen supply system is as follows: Figure 1 As shown, a liquid hydrogen-hydrogen phase change process occurs inside the heat exchanger. Under unstable engine operating conditions, the unstable heat exchange in the heat exchanger will cause instability in the hydrogen phase change process, resulting in significant fluctuations in the hydrogen pressure in the pressure stabilization section pipeline, directly affecting the hydrogen flow rate regulated by the metering valve. Furthermore, the active adjustment of hydrogen flow rate by the metering valve will also interfere with the hydrogen pressure in the pressure stabilization section pipeline, making precise hydrogen flow rate regulation even more difficult. Therefore, achieving pressure control of the hydrogen supply system is crucial to ensuring its normal operation.

[0003] The hydrogen supply system controls the stability of hydrogen pressure within the stabilizing section of the pipeline by adjusting the pressure regulating valve. This requires rapidly suppressing pressure and temperature disturbances caused by unstable phase changes within the heat exchanger, as well as flow disturbances caused by the operation of the metering valve. However, the hydrogen gas inside the stabilizing section is highly compressible and exhibits strong nonlinearity and uncertainty. Due to these factors, traditional control methods such as PID control and pole placement are insufficient for precise control of the hydrogen pressure within the stabilizing section, and may even induce system oscillations.

[0004] Currently, the relevant technologies employ traditional composite control methods such as PID, feedforward + PID feedback, and pole placement. However, under external disturbances such as unstable heat exchange and changes in metering flow, the hydrogen supply system experiences large pressure fluctuations and low control accuracy. Summary of the Invention

[0005] This application provides a pressure control method and storage medium for a hydrogen supply device for a hydrogen turbine engine, which solves the pressure control problem of the hydrogen supply system under strong external disturbances such as unstable heat exchange and changes in metering flow rate, and achieves high pressure accuracy.

[0006] This application provides a pressure control method for a hydrogen supply device for a hydrogen turbine engine, including:

[0007] Obtain the equipment parameters of each device in the hydrogen supply system during the current control cycle;

[0008] Based on the equipment parameters of the hydrogen supply system in the current control cycle, calculate the model parameters of the control model of the hydrogen supply system in the current control cycle;

[0009] Based on the model parameters in the current control cycle, the unknown parameters and system state parameters of the hydrogen supply system in the current control cycle are estimated.

[0010] Based on the model parameters, the unknown parameters, and the system state parameters in the current control cycle, calculate the control quantity of the hydrogen supply system in the next control cycle;

[0011] Based on the system state parameters estimated by the hydrogen supply system in the current control cycle, calculate the speed correction amount of the hydrogen supply system in the next control cycle;

[0012] The hydrogen supply system is subjected to feedback control by utilizing the control amount and speed correction amount of the pump in the next control cycle.

[0013] Optionally, the equipment parameters include hydrogen temperature in the pressure stabilizing section pipeline, internal volume of the pressure stabilizing section pipeline, gain coefficient of the pressure stabilizing valve on the pressure before the valve, gain coefficient of the metering valve on the pressure before the valve, gain coefficient of the pressure stabilizing valve on the valve opening, specific heat and constant pressure specific heat capacity.

[0014] Optionally, the model parameters include system parameters and input gain.

[0015] Optionally, calculating the model parameters of the control model of the hydrogen supply system in the current control cycle based on the equipment parameters of the hydrogen supply system in the current control cycle includes:

[0016] The first difference is obtained by subtracting the specific heat from 1, and the second difference is obtained by subtracting the gain coefficient of the pressure stabilizing valve from the pressure before the valve from the gain coefficient of the metering valve from the pressure before the valve.

[0017] The first product is obtained by multiplying the first difference, the specific heat capacity at constant pressure, the hydrogen temperature in the pressure-stabilizing section pipeline, and the second difference, and the system parameters are obtained by dividing the first product by the internal volume of the pressure-stabilizing section pipeline.

[0018] The first difference, the constant pressure specific heat capacity, the hydrogen temperature in the pressure-stabilizing section pipeline, and the gain coefficient of the pressure-stabilizing valve on the valve opening are multiplied to obtain the second product. The second product is then divided by the internal volume of the pressure-stabilizing section pipeline to obtain the input gain.

[0019] Optionally, estimating the unknown parameters of the hydrogen supply system in the current control cycle and the system state parameters in the next control cycle based on the model parameters in the current control cycle includes:

[0020] The model parameters are input into the state predictor so that the state predictor, together with the state parameter prediction equation and the unknown parameter prediction equation, can predict the unknown parameters and system state parameters of the hydrogen supply system in the current control cycle.

[0021] Optionally, the system status parameters include the pressure value of hydrogen in the pressure stabilization section pipeline.

[0022] Optionally, the control quantity includes a baseline term, an adaptive term, and a fast correction term.

[0023] Optionally, calculating the control quantity of the hydrogen supply system in the next control cycle based on the model parameters, the unknown parameters, and the system state parameters in the current control cycle includes:

[0024] Calculate the baseline term using the model parameters of the current control cycle;

[0025] Using the unknown parameters in the current control cycle, calculate the adaptive term;

[0026] Calculate the fast correction term using the system parameter state in the next control cycle;

[0027] The baseline term, the adaptive term, and the fast correction term are summed to obtain the control quantity of the hydrogen supply system in the next control cycle.

[0028] Optionally, calculating the speed correction amount of the hydrogen supply system in the next control cycle based on the system state parameters estimated by the hydrogen supply system in the current control cycle includes:

[0029] Calculate the third difference between the system state parameters estimated by the hydrogen supply system in the current control cycle and the predetermined pressure difference required to maintain phase change stability, and determine the third difference as the constant pressure difference of the pump;

[0030] Based on the constant pressure difference of the pump and the actual downstream pressure, the speed correction amount of the hydrogen supply system in the next control cycle is calculated.

[0031] Optionally, the step of using the control amount and speed correction amount of the pump in the hydrogen supply system in the next control cycle to perform feedback control of the hydrogen supply system includes:

[0032] The control quantity is output to the pressure regulating valve in the hydrogen supply system to adjust the opening degree of the pressure regulating valve;

[0033] Based on the speed correction amount, a pump speed correction command is generated and output to the pump speed controller in the hydrogen supply system so that it calculates the sum of the speed correction amount and the base speed to obtain the corrected speed, and adjusts the pump speed based on the corrected speed.

[0034] This application provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the method described in any of the preceding claims.

[0035] This application provides a pressure control method for a hydrogen supply device in a hydrogen turbine engine. The method includes: calculating model parameters for the current control cycle based on equipment parameters of the hydrogen supply system; estimating unknown parameters and system state parameters for the current control cycle; calculating the control quantity for the hydrogen supply system in the next control cycle based on the model parameters, unknown parameters, and system state parameters for the current control cycle; calculating the speed correction of the hydrogen supply system in the next control cycle based on the estimated system state parameters for the current control cycle; and performing feedback control of the hydrogen supply system using the control quantity and speed correction of the pump within the hydrogen supply system in the next control cycle. This application can effectively suppress pressure fluctuations caused by strong disturbances, significantly improve the control accuracy and system stability of the hydrogen supply pressure, and meet the stringent requirements of hydrogen turbine engines for high-pressure hydrogen supply systems. Attached Figure Description

[0036] Figure 1 The diagram shown is a simplified structural diagram of the hydrogen supply system.

[0037] Figure 2 The diagram shown is a schematic flow chart of a pressure control method for a hydrogen supply device for a hydrogen turbine engine provided in an embodiment of this application.

[0038] Figure 3 The diagram shown is a schematic representation of a pressure control method for a hydrogen supply device for a hydrogen turbine engine, provided in an embodiment of this application.

[0039] Figure 4 The diagram shown is a schematic representation of the metering valve opening change provided in an embodiment of this application.

[0040] Figure 5 The diagram shown is a schematic representation of the pressure response provided in an embodiment of this application.

[0041] Figure 6 The diagram shown is a schematic diagram of the opening degree change of the pressure regulating valve provided in the embodiment of this application. Detailed Implementation

[0042] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with one or more embodiments of this specification. Rather, they are merely examples of apparatuses and methods consistent with some aspects of one or more embodiments of this specification as detailed in the appended claims.

[0043] It should be noted that the steps of the corresponding methods are not necessarily performed in the order shown and described in this specification in other embodiments. In some other embodiments, the methods may include more or fewer steps than described in this specification. Furthermore, a single step described in this specification may be broken down into multiple steps in other embodiments; and multiple steps described in this specification may be combined into a single step in other embodiments.

[0044] Related technologies struggle to effectively address issues such as strong nonlinearity and uncertainty in hydrogen supply systems. Under external disturbances such as unstable heat exchange and changes in metering flow, hydrogen supply systems experience large pressure fluctuations and low control accuracy.

[0045] Some related technologies employ control methods such as model predictive control, but this approach requires high accuracy of the predictive model and involves a large computational load, making it unsuitable for existing hydrogen supply system controllers. Furthermore, various nonlinear control theories and methods face a combination of challenges, including strong nonlinearity, the speed of disturbance rejection in uncertain systems, and the phase transition stability of hydrogen supply systems, making direct application to hydrogen supply systems difficult.

[0046] To address the technical problem of low control precision in related technologies, this application proposes a pressure control method and storage medium for a hydrogen supply device for a hydrogen turbine engine. This method can effectively suppress pressure fluctuations caused by strong disturbances, significantly improve the control precision and system stability of the hydrogen supply pressure, and meet the stringent requirements of hydrogen turbine engines for high-pressure hydrogen supply systems.

[0047] Combination Figure 2 and Figure 3 , Figure 2 A flowchart illustrating a pressure control method for a hydrogen supply device for a hydrogen turbine engine, as provided in this application. Figure 3 This is a schematic diagram illustrating the process of a pressure control method for a hydrogen supply device for a hydrogen turbine engine provided in this application.

[0048] This application provides a pressure control method for a hydrogen supply device for a hydrogen turbine engine, including:

[0049] S100: Obtain the equipment parameters of each device in the hydrogen supply system during the current control cycle.

[0050] The equipment parameters include the hydrogen temperature T in the pressure-stabilizing section pipeline, the internal volume V of the pressure-stabilizing section pipeline, and the gain coefficient k of the pressure-stabilizing valve on the upstream pressure. p1 The gain coefficient k of the metering valve to the upstream pressure p2 The gain coefficient k of the pressure regulating valve on the valve opening. pa1 Specific heat γ and specific heat capacity at constant pressure C p .

[0051] To accurately characterize the steady-state and dynamic properties of the hydrogen supply system, a control model is established as shown in equation (1):

[0052]

[0053] In the formula, a0 and b are model parameters to be solved, where a0 represents the system parameter and b represents the input gain. p is the hydrogen pressure in the stabilizing section of the pipeline, which is an unknown quantity. θ and σ are unknown parameters, p a This refers to the inlet pressure of the pressure regulating valve; the subscript 'a' stands for the first letter of 'ahead', and 'u' represents the inlet pressure. p1 u p2 The opening degree of pressure regulating valves and metering valves is distinguished by the subscripts p1 and p2, where p stands for pressure. γ represents the specific heat ratio, C. p The specific heat capacity at constant pressure is given by subscript p, where p stands for pressure; T represents the hydrogen temperature within the pressure-stabilizing section of the pipeline; and V represents the internal volume of the pressure-stabilizing section. u1 k u2 These are the gain coefficients for the pressure regulating valve and the metering valve on the valve opening, respectively. The subscript u is a common symbol for control inputs in control systems, and k... pa1 These parameters, representing the gain coefficient of the pressure regulating valve on the upstream pressure, can be obtained from the valve's flow characteristics. When insufficient information about the valve's flow characteristics is available, setting k is permissible. pa1 =0, k u2 =0.

[0054] Traditional methods model the control model as Equation (2):

[0055]

[0056] Given the input gain b, the unknown nonlinear terms g1 and g2 in equation (2) are then solved. Equation (2), with the unknown nonlinear terms g1 and g2 solved, is used to control the hydrogen supply system. However, this simple modeling of equation (2) does not fully identify the steady-state and dynamic characteristics of the system, making it very difficult for the subsequently designed controller to handle uncertainties and failing to achieve high-precision pressure control. This application adopts the control model shown in equation (1), which fully utilizes the known steady-state and dynamic information of the hydrogen supply system and can achieve accurate control.

[0057] S200, based on the equipment parameters of the hydrogen supply system in the current control cycle, calculate the model parameters of the control model of the hydrogen supply system in the current control cycle.

[0058] The model parameters include system parameters and input gain.

[0059] This application can use equipment parameters to calculate the control model of the hydrogen supply system, namely the model parameters in equation (1), namely a0 and b.

[0060] In one specific embodiment of this application, step S200 includes:

[0061] S210, the first difference is obtained by subtracting the specific heat from 1, and the second difference is obtained by subtracting the gain coefficient of the pressure stabilizing valve from the pressure before the valve and the gain coefficient of the metering valve from the pressure before the valve.

[0062] S220, multiply the first difference, the constant pressure specific heat capacity, the hydrogen temperature in the pressure stabilizing section pipeline and the second difference to obtain the first product, and divide the first product by the internal volume of the pressure stabilizing section pipeline to obtain the system parameters;

[0063] The specific formula for calculating the system parameters is shown in formula (3) below:

[0064]

[0065] In the formula, γ-1 is the first difference, and k p1 -k p2 This is the second difference. k p1 k p2 These are the gain coefficients of the pressure regulating valve and the metering valve on the upstream pressure, respectively.

[0066] S230, multiply the first difference, the constant pressure specific heat capacity, the hydrogen temperature in the pressure stabilizing section pipeline, and the gain coefficient of the pressure stabilizing valve to the valve opening to obtain a second product, and divide the second product by the internal volume of the pressure stabilizing section pipeline to obtain the input gain.

[0067] The specific formula for calculating the input gain is shown in formula (4) below:

[0068]

[0069] S300, based on the model parameters in the current control cycle, estimate the unknown parameters and system state parameters of the hydrogen supply system in the current control cycle; wherein, the system state parameters include the pressure value of hydrogen in the pressure stabilization section pipeline.

[0070] In this application, after calculating the model parameters, the unknown parameters in equation (1) need to be solved. During the solution process, this application uses a state predictor to complete the state prediction and unknown parameter estimation of the hydrogen supply system.

[0071] In one specific embodiment of this application, this step inputs the model parameters into the state predictor so that the state predictor, in conjunction with the state parameter prediction equation and the unknown parameter prediction equation, can predict the unknown parameters and system state parameters of the hydrogen supply system in the current control cycle.

[0072] The state parameter prediction equation is shown in equation (5):

[0073]

[0074] in, This is the estimated hydrogen pressure in the pressure-stabilizing section of the pipeline at time k+1. This represents the estimated hydrogen pressure in the pressure-stabilizing section of the pipeline at time k. Let θ be the estimated value of the unknown parameter at time k. Let be the estimated value of the unknown parameter σ at time k. Let a0(k) be the system parameter at time k, and b(k) be the input gain at time k. a (k) represents the inlet pressure of the pressure regulating valve at time k. p1 (k), u p2 (k) represents the opening degree of the pressure regulating valve and the metering valve at time k. k represents the current time, T s Let k be the control period (subscript represents Sample), and k be the actual time. Each increment of k by 1 indicates a shift from the current control period to the next. k = 1, 2, 3… In equation (5) The pressure value measured at system startup can be used.

[0075] The equation for predicting the unknown parameters is shown in equation (6):

[0076]

[0077] In the formula, Γ is a positive real number, representing the adaptive gain. p(k-1) represents the actual hydrogen pressure in the pressure-stabilizing section of the pipeline at time k-1. This is the estimated value of the hydrogen pressure in the pressure stabilization section pipeline at time k+1. This represents the estimated value of the unknown parameter θ at time k. b(k-1) represents the estimated value of the unknown parameter θ at time k-1, and b(k-1) represents the input gain at time k-1. This represents the estimated value of the unknown parameter σ at time k. This represents the estimated value of the unknown parameter σ at time k-1. p(0) is the value at the initial moment, and both can be taken as the pressure value measured when the system starts.

[0078] The combination of formulas (5) and (6) in this application can predict the unknown parameters of the hydrogen supply system in the current control cycle. and system status parameters

[0079] This application possesses the ability to estimate unknown parameters, eliminating the need for users to precisely calculate the parameters of the control model, thus significantly reducing the limitations of the method. The control method proposed in this application requires minimal computation and can be easily applied to existing controllers, thereby improving its applicability.

[0080] S400, calculate the control quantity of the hydrogen supply system in the next control cycle based on the model parameters, the unknown parameters, and the system state parameters in the current control cycle.

[0081] The control quantity may include, but is not limited to, the reference term u. bas Adaptive term u fil and quick correction item u rev .

[0082] In one specific embodiment of this application, S400 may include, but is not limited to:

[0083] S410, using the model parameters of the current control cycle, calculate the reference term;

[0084] The calculation method for the benchmark term is shown in equation (7):

[0085]

[0086] The reference term is used to offset known disturbances (i.e. and ), and through By introducing a pressure control instruction r, the state p(k) is made to track the instruction r, thereby achieving good dynamic performance.

[0087] S420, using the unknown parameters in the current control cycle, calculate the adaptive term;

[0088] The adaptive term is calculated as shown in equation (8):

[0089]

[0090] In the formula, x fil (k) represents the state of the filter at time k, x fil (k+1) represents the state of the filter at time k+1, the subscript fil indicates filtering, and A fil B fil Let be the system matrix and input matrix of the filter. est(k) represents the total estimate of the unknown uncertainty and external disturbances of the system at time k, and the subscript est represents estimate. In the above equation (8), the first expression indicates that the total estimate is low-pass filtered to prevent the high-frequency estimate from directly entering the control system and causing system instability. The second expression uses the negative value of the filtered total estimate as the control input to cancel the unknown uncertainty and external disturbances in the system. Select parameter A fil B fil The following conditions should be met: The filter is stable with a steady-state gain of 1, s is a complex variable, and C(s) is the filter's transfer function. For example, in this application, C(s) is taken as a first-order transfer function. Where τ is the time constant.

[0091] S430, using the system parameter state in the next control cycle, calculate the fast correction term;

[0092] The calculation method for the fast correction term is shown in equation (9):

[0093]

[0094] In the formula, e(k) = rp(k), representing the tracking error. α1, β1, k rev k is a positive real number rev The subscript indicates filtering; all three are adjustable gain parameters, 0 < γ. 10 <1, γ 20 >1.

[0095] S440, the baseline term, the adaptive term, and the fast correction term are summed to obtain the control quantity of the hydrogen supply system in the next control cycle.

[0096] In the next control cycle, the control quantity u p1 The calculation method for (k+1) is shown in equation (10):

[0097] u p1 (k+1)=u bas (k)+u fil (k)+u rev (k)(10);

[0098] S500, based on the system state parameters estimated by the hydrogen supply system in the current control cycle, calculate the speed correction amount of the hydrogen supply system in the next control cycle.

[0099] In one specific embodiment of this application, S500 may include, but is not limited to:

[0100] S510, calculate the third difference between the system state parameters estimated by the hydrogen supply system in the current control cycle and the predetermined pressure difference value required to maintain phase change stability, and determine the third difference value as the constant pressure difference of the pump;

[0101] Unstable heat transfer leads to phase change instability, significantly interfering with pressure stabilization control, which needs to be suppressed. The pump outlet pressure condition for maintaining phase change stability is obtained based on the phase change characteristics of the heat exchanger, expressed as:

[0102] p ap (k)=f(Φ(k))(11);

[0103] In the formula, Φ represents the set of parameters related to phase change stability, and is taken as the estimated value of hydrogen pressure in the stabilizing section of the pipeline. This application does not impose specific restrictions on parameters such as the external ambient temperature and hydrogen flow rate of the heat exchanger. ap (k) represents the desired post-pump pressure, with the subscript ap indicating "after the pump". f(·) represents the parameters Φ and p when the phase transition is stable. ap The relationship, f(·), can take various forms such as mathematical expressions, neural networks, and interpolation tables, and this application does not impose any restrictions. For example, to ensure the rapid flow and stable phase change of hydrogen fuel, a method for setting a constant pressure difference is as follows: Δp is the pressure difference required to maintain phase transition stability.

[0104] The pump speed regulation scheme for maintaining phase change stability proposed in this application allows users to determine the appropriate phase change stability relationship f(·) using various different methods. Furthermore, for A... fil B fil k pa1 k u2 The design of many parameters is not subject to mandatory requirements, which increases the flexibility of the design. Therefore, this application has advantages in application.

[0105] S520, based on the constant pressure difference of the pump and the actual downstream pressure, calculate the speed correction amount of the hydrogen supply system in the next control cycle.

[0106] Based on p ap (k) and the actual post-pump pressure p act (k) (subscript indicates actual) Calculate the corrected speed adjustment for the next time step, as shown in equation (12):

[0107]

[0108] In the formula, k pump The subscript ΔN is used to adjust the pump speed. pump This is the speed correction amount used to correct the pump speed command.

[0109] This embodiment establishes a controller that integrates a reference term, a compensation term, and a fast correction term. The reference term cancels out known disturbance terms and provides good dynamic performance. The compensation term compensates for unknown uncertainties and external disturbances within a limited bandwidth, ensuring that the transient tracking error of the system is bounded. The fast correction term quickly corrects the dynamic response of the system, ensuring the fast convergence of the system and improving control accuracy.

[0110] S600 utilizes the control amount and speed correction amount of the pump in the hydrogen supply system in the next control cycle to perform feedback control on the hydrogen supply system.

[0111] In this embodiment, based on the equipment parameters of the hydrogen supply system in the current control cycle, the model parameters for the current control cycle are calculated, and then the unknown parameters and system state parameters for the current control cycle are estimated. Based on the model parameters, unknown parameters, and system state parameters in the current control cycle, the control quantity of the hydrogen supply system in the next control cycle is calculated. Based on the system state parameters estimated in the current control cycle, the speed correction of the hydrogen supply system in the next control cycle is calculated. Feedback control of the hydrogen supply system is performed using the control quantity and speed correction of the pump within the hydrogen supply system in the next control cycle. This application can effectively suppress pressure fluctuations caused by strong disturbances, significantly improve the control accuracy and system stability of the hydrogen supply pressure, and meet the stringent requirements of hydrogen turbine engines for high-pressure hydrogen supply systems.

[0112] In one specific embodiment of this application, S600 includes:

[0113] S610, the control quantity is output to the pressure regulating valve in the hydrogen supply system to adjust the opening degree of the pressure regulating valve;

[0114] like Figure 3 As shown, the control quantity u p1 The pressure is supplied to the pressure regulating valve, and its opening value is adjusted.

[0115] S620, a pump rotation correction command is generated based on the rotation speed correction amount, and the pump rotation correction command is output to the pump rotation controller in the hydrogen supply system so that it calculates the sum of the rotation speed correction amount and the base rotation speed to obtain the corrected rotation speed, and the pump rotation speed is adjusted based on the corrected rotation speed.

[0116] like Figure 3 As shown, a pump speed correction command is synchronously generated and sent to the pump speed controller, causing it to adjust the speed correction amount ΔN. pump With respect to the base pump speed N bas (The subscript bas indicates basic) The corrected rotational speed is calculated by superposition as N = N bas +ΔN pump This allows for adjustment of the pump's rotational speed, ultimately achieving high-precision control of the hydrogen pressure within the pressure-stabilizing section of the hydrogen supply system.

[0117] Traditional methods only consider pressure control, which fails when hydrogen fuel phase change becomes unstable. This application provides a pump speed regulation scheme to maintain phase change stability. The provided "pressure control + pump speed regulation" overall architecture can effectively ensure the pressure stability of the hydrogen supply system under complex heat exchange conditions. Therefore, this application is technically more advanced.

[0118] For interference caused by changes in metering valve opening, see Figure 4 The method described in this application was compared with traditional PID control in a simulation, showing the pressure change of the hydrogen supply system as follows: Figure 5 As shown in the figure, it can be seen that after adopting the method of this application, the pressure regulation time is shortened by about 0.43s, significantly accelerating the pressure response speed and improving the control accuracy. The change in the opening degree of the pressure regulating valve is as follows: Figure 6 As shown, the method of this application improves the smoothness of valve operation while accelerating the adjustment speed of the pressure regulating valve. Therefore, the method proposed in this application can effectively handle the problem of high-precision pressure control in hydrogen supply systems with strong nonlinearity and uncertainty.

[0119] This application provides a computer-readable storage medium having a program stored thereon that, when executed by a processor, implements the method described in any of the preceding claims.

[0120] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

[0121] It should also be noted that 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 process, method, article, or apparatus. Without further limitation, an element qualified by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A pressure control method for a hydrogen supply device for a hydrogen turbine engine, characterized in that, include: Obtain the equipment parameters of each device in the hydrogen supply system during the current control cycle; Based on the equipment parameters of the hydrogen supply system in the current control cycle, calculate the model parameters of the control model of the hydrogen supply system in the current control cycle; Based on the model parameters in the current control cycle, the unknown parameters and system state parameters of the hydrogen supply system in the current control cycle are estimated. Based on the model parameters, the unknown parameters, and the system state parameters in the current control cycle, calculate the control quantity of the hydrogen supply system in the next control cycle; Based on the system state parameters estimated by the hydrogen supply system in the current control cycle, calculate the speed correction amount of the hydrogen supply system in the next control cycle; The hydrogen supply system is subjected to feedback control by utilizing the control amount and speed correction amount of the pump in the next control cycle.

2. The pressure control method for the hydrogen supply device of the hydrogen turbine engine as described in claim 1, characterized in that, The equipment parameters include hydrogen temperature in the pressure stabilizing section pipeline, internal volume of the pressure stabilizing section pipeline, gain coefficient of the pressure stabilizing valve on the pressure before the valve, gain coefficient of the metering valve on the pressure before the valve, gain coefficient of the pressure stabilizing valve on the valve opening, specific heat and constant pressure specific heat capacity.

3. The pressure control method for the hydrogen supply device of the hydrogen turbine engine as described in claim 2, characterized in that, The model parameters include system parameters and input gain.

4. The pressure control method for the hydrogen supply device of the hydrogen turbine engine as described in claim 3, characterized in that, The step of calculating the model parameters of the control model of the hydrogen supply system in the current control cycle based on the equipment parameters of the hydrogen supply system in the current control cycle includes: The first difference is obtained by subtracting the specific heat from 1, and the second difference is obtained by subtracting the gain coefficient of the pressure stabilizing valve from the pressure before the valve from the gain coefficient of the metering valve from the pressure before the valve. The first product is obtained by multiplying the first difference, the specific heat capacity at constant pressure, the hydrogen temperature in the pressure-stabilizing section pipeline, and the second difference, and the system parameters are obtained by dividing the first product by the internal volume of the pressure-stabilizing section pipeline. The first difference, the constant pressure specific heat capacity, the hydrogen temperature in the pressure-stabilizing section pipeline, and the gain coefficient of the pressure-stabilizing valve on the valve opening are multiplied to obtain the second product. The second product is then divided by the internal volume of the pressure-stabilizing section pipeline to obtain the input gain.

5. The pressure control method for the hydrogen supply device of the hydrogen turbine engine as described in claim 1, characterized in that, The step of estimating the unknown parameters of the hydrogen supply system in the current control cycle and the system state parameters in the next control cycle based on the model parameters in the current control cycle includes: The model parameters are input into the state predictor so that the state predictor, together with the state parameter prediction equation and the unknown parameter prediction equation, can predict the unknown parameters and system state parameters of the hydrogen supply system in the current control cycle. And / or, The system status parameters include the pressure value of hydrogen in the pressure stabilization section pipeline.

6. The pressure control method for the hydrogen supply device of the hydrogen turbine engine as described in claim 1, characterized in that, The control variables include a baseline term, an adaptive term, and a fast correction term.

7. The pressure control method for the hydrogen supply device of the hydrogen turbine engine as described in claim 6, characterized in that, The step of calculating the control quantity of the hydrogen supply system in the next control cycle based on the model parameters, the unknown parameters, and the system state parameters in the current control cycle includes: Calculate the baseline term using the model parameters of the current control cycle; Calculate the adaptive term using the unknown parameters in the current control cycle; Calculate the fast correction term using the system parameter state in the next control cycle; The baseline term, the adaptive term, and the fast correction term are summed to obtain the control quantity of the hydrogen supply system in the next control cycle.

8. The pressure control method for the hydrogen supply device of the hydrogen turbine engine as described in claim 1, characterized in that, The step of calculating the speed correction amount of the hydrogen supply system in the next control cycle based on the system state parameters estimated by the hydrogen supply system in the current control cycle includes: Calculate the third difference between the system state parameters estimated by the hydrogen supply system in the current control cycle and the predetermined pressure difference required to maintain phase change stability, and determine the third difference as the constant pressure difference of the pump; Based on the constant pressure difference of the pump and the actual downstream pressure, the speed correction amount of the hydrogen supply system in the next control cycle is calculated.

9. The pressure control method for the hydrogen supply device of a hydrogen turbine engine as described in claim 1, characterized in that, The step of using the control quantity and speed correction quantity of the pump in the hydrogen supply system in the next control cycle to perform feedback control of the hydrogen supply system includes: The control quantity is output to the pressure regulating valve in the hydrogen supply system to adjust the opening degree of the pressure regulating valve; Based on the speed correction amount, a pump speed correction command is generated and output to the pump speed controller in the hydrogen supply system so that it can calculate the sum of the speed correction amount and the base speed to obtain the corrected speed, and adjust the pump speed based on the corrected speed.

10. A computer-readable storage medium, characterized in that, It stores a program that, when executed by a processor, implements the pressure control method for the hydrogen supply device of the hydrogen turbine engine as described in any one of claims 1 to 9.

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