Hydrogen starting control method and system for turbine engine

Abstract

The invention relates to a hydrogen starting control method and system for a turbine engine, and belongs to the technical field of turbine engine starting. The starting control method comprises a hydrogen supply control method, the hydrogen supply control method comprises a motor driving stage, an open-loop control stage, an acceleration closed-loop control stage and a slow running stage, a sequence of ignition and hydrogen supply is used in the motor driving stage, and a sequence of ignition and hydrogen supply is used in the open-loop control stage and the acceleration closed-loop control stage. And the hydrogen flow is controlled according to the preset relation between the engine rotating speed and the hydrogen flow, and after the two stages are finished, a slow running stage is started, namely starting control is finished. According to the invention, sequential control of ignition and hydrogen supply is adopted, so that hydrogen explosion during ignition is prevented, and the safety during ignition is improved; and secondly, in the open-loop control stage and the acceleration closed-loop control stage, the hydrogen flow is controlled in stages, the flow can be corrected in real time, and the stability of the starting process is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of turbine engine starting, and particularly relates to a hydrogen starting control method and system for a turbine engine. Background Art

[0002] Hydrogen is a flammable and explosive gas with low density, strong diffusibility and high leakage tendency. After the electronic controller receives the starting instruction, the engine enters the ignition stage. In this stage, if the hydrogen flow rate is too large, hydrogen explosion is likely to occur, damaging the engine and posing great safety risks; if the hydrogen flow rate is too small, ignition will not succeed and starting will fail.

[0003] Currently, there is much research on automotive hydrogen fuel engines. For example, a hydrogen engine starting control method based on segmented control disclosed in CN102392744 A. After the engine starts, according to the camshaft signal and crankshaft signal, the engine speed is detected in real time, and segmented control is performed according to the engine speed. The hydrogen engine of this method is applicable to automotive engines, but there are significant differences in structure and performance between automotive engines and turbine engines, and this method cannot be fully applied to turbine engines.

[0004] In terms of turbine engine starting, most are liquid fuel starting. For example, a micro-turbine engine starting control system and method based on a kerosene igniter disclosed in CN112814788A, whose method completes starting control according to the speed and hydrogen supply amount. However, hydrogen is different from fuel. It has extremely low density, requires high pressure for large-scale storage, has a wide explosion range, and in addition, has a fast combustion speed and high temperature, and the temperature, pressure and density of hydrogen are extremely easy to change, making it very difficult to accurately control and measure. The starting control technology of fuel turbine engines cannot be fully applied to the starting control of hydrogen fuel turbine engines either.

[0005] Therefore, aiming at the hydrogen starting of turbine engines, it is urgent to solve the problems of ignition hydrogen explosion and difficult starting process control. Summary of the Invention

[0006] In view of the above problems, the present invention provides a hydrogen starting control method and system for a turbine engine.

[0007] The first object of the present invention is a hydrogen starting control method for a turbine engine, including a hydrogen supply control method, and the hydrogen supply control method includes: Motor-driven rotation stage: Start the starter, drive the engine to rotate through the starter; according to the engine speed reaching the first speed threshold signal, first turn on the ignition device for ignition, and then turn on the hydrogen supply pipeline; Open-loop control stage: Hydrogen supply starts and the open-loop control stage begins; according to the engine speed reaching the second speed threshold signal, the open-loop control stage stops; during the entire open-loop control stage, the hydrogen flow rate is controlled according to the pre-given relationship between the engine speed and the hydrogen flow rate. Acceleration closed-loop control stage: According to the engine speed reaching the second speed threshold signal, the acceleration closed-loop control stage begins; according to the engine speed reaching the fourth speed threshold signal, the acceleration closed-loop control stage stops; during the entire acceleration closed-loop control stage, the hydrogen flow rate is controlled according to the pre-given relationship between the engine speed and the hydrogen flow rate. Idle running stage: According to the engine speed reaching the fourth speed threshold signal, the starting motor is turned off and the engine enters the idle running state.

[0008] In a specific embodiment of the present invention, the first speed threshold is greater than 2000 rpm.

[0009] In a specific embodiment of the present invention, the second speed threshold is greater than 10000 rpm.

[0010] In a specific embodiment of the present invention, during the acceleration closed-loop control stage, according to the engine speed reaching the third speed threshold signal, the ignition device is stopped.

[0011] In a specific embodiment of the present invention, the third speed threshold is greater than 12000 rpm; the fourth speed threshold is greater than 16500 rpm.

[0012] In a specific embodiment of the present invention, the control method further includes a safety control method, and the safety control method includes a starting limit method. The starting limit method includes: During the starting process of the turbine engine, according to the signal that the engine speed exceeds the limit speed and / or the exhaust gas temperature exceeds the limit temperature, the given speed is locked.

[0013] In a specific embodiment of the present invention, the control method further includes a safety control method, and the safety control method includes a starting protection method. The starting protection method includes: According to any one of the signals in the starting protection conditions, start the protection shutdown. Among them, the starting protection conditions include: The exhaust gas temperature is greater than the safety temperature threshold; The exhaust gas temperature signal fails; During the closed-loop control stage, the engine speed signal fails; Within the first time after the engine starts, it is not detected that the ignition device ignites successfully.

[0014] In a specific embodiment of the present invention, the detection of whether the ignition device ignites successfully is determined by whether the exhaust gas temperature exceeds the ignition temperature threshold; If the exhaust gas temperature exceeds the ignition temperature threshold, it indicates that the ignition device ignites successfully; If the exhaust gas temperature does not exceed the ignition temperature threshold, it indicates that the ignition device fails to ignite.

[0015] In a specific embodiment of the present invention, the safety temperature threshold is 1010°C; the ignition temperature threshold is 50°C.

[0016] The second object of the present invention is to provide a hydrogen starting control system for a turbine engine, including a hydrogen supply control module, and the hydrogen supply control module is used to implement a hydrogen control method, including: Motor with rotor module: used to start the starter, drive the turbine rotor to rotate through the starter; according to the engine speed reaching the first speed threshold signal, first start the ignition device to ignite, and then open the hydrogen supply pipeline; Speed open-loop control sub-module: used to start hydrogen supply and enter the open-loop control stage; according to the engine speed reaching the second speed threshold signal, stop the open-loop control stage; during the whole process of the open-loop control stage, control the hydrogen flow rate according to the pre-given relationship between the engine speed and the hydrogen flow rate; Acceleration closed-loop control sub-module: used to enter the acceleration closed-loop control stage according to the engine speed reaching the second speed threshold signal; according to the engine speed reaching the fourth speed threshold signal, stop the acceleration closed-loop control stage; during the whole process of the acceleration closed-loop control stage, control the hydrogen flow rate according to the pre-given relationship between the engine speed and the hydrogen flow rate; Idle running sub-module: used to close the starting motor according to the engine speed reaching the fourth speed threshold signal and enter the engine idle running state.

[0017] In a specific embodiment of the present invention, the hydrogen starting control system for a turbine engine further includes a safety control module, and the safety control module is used to implement a safety control method, and the safety control module includes a starting limit sub-module; The starting limit sub-module is used to lock the given speed according to the signal that the engine speed exceeds the limit speed and / or the exhaust gas temperature exceeds the limit temperature during the starting process of the turbine engine.

[0018] In a specific embodiment of the present invention, the hydrogen starting control system for a turbine engine further includes a safety control module, and the safety control module is used to implement a safety control method, and the safety control module includes a starting protection sub-module; The starting protection sub-module is used to start the protection shutdown according to any signal in the starting protection conditions.

[0019] Advantages of the present invention: A hydrogen starting control method and system for a turbine engine according to the present invention. The starting control method of the present invention includes a hydrogen supply control method, and the hydrogen supply control method includes: a motor-driven rotation stage, an open-loop control stage, an acceleration closed-loop control stage, and a slow-speed operation stage. In the motor-driven rotation stage, the sequence of ignition first and then hydrogen supply is used. In the open-loop control stage and the acceleration closed-loop control stage, according to the pre-given relationship between the engine speed and the hydrogen flow rate, the hydrogen flow rate is controlled. After the end of these two stages, the slow-speed operation stage is entered, that is, the starting control is ended. First of all, considering the characteristics of hydrogen being flammable and explosive, the sequence control of ignition first and then hydrogen supply is used to prevent hydrogen explosion during ignition, improving the safety during ignition. Secondly, considering the characteristic that the hydrogen pressure fluctuates greatly during engine operation, the open-loop control stage and the acceleration closed-loop control stage are designed to control the hydrogen flow rate in stages, which can correct the flow rate in real time and accurately measure and deliver the hydrogen fuel to the engine combustion chamber, not only ensuring the engine to complete starting, but also ensuring the stability of the starting process, and solving the problem of difficult hydrogen starting control of turbine engines.

[0020] Moreover, the starting control method of the present invention further includes a safety control method, and the safety control method includes a starting limit method and a starting protection method. The two safety control methods further ensure the stability and safety of the hydrogen starting process; Furthermore, in the present invention, considering the characteristics that too small hydrogen flow rate may lead to ignition failure and too large flow rate may cause hydrogen explosion, the optimal hydrogen flow rate during ignition is calculated according to the engine performance in the sequence of ignition first and then hydrogen supply.

[0021] Other features and advantages of the present invention will be described in the subsequent specification, and, in part, will become apparent from the specification, or will be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures pointed out in the specification, claims, and drawings. Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 Shows a flowchart of a hydrogen starting control method for a turbine engine according to an embodiment of the present invention; Figure 2 Shows a schematic diagram of a hydrogen fuel engine control system according to an embodiment of the present invention; Figure 3 Shows a framework diagram of a hydrogen starting control system for a turbine engine according to an embodiment of the present invention; In the figure: 10, electronic controller; 11, first electrical signal; 12, second electrical signal; 20, ignition device; 21, third electrical signal; 30, engine; 31, fourth electrical signal; 32, fifth electrical signal; 40, hydrogen pipeline system; 41, gas source pipeline; 42, regulating pipeline; 43, regulated pipeline; 44, stop valve; 45, first pressure sensor; 46, regulating valve; 47, first pressure sensor; 50, hydrogen source; 60, starting motor; 61, sixth electrical signal; 100, hydrogen supply control module; 110, motor with rotor module; 120, open-loop control sub-module; 130, acceleration closed-loop control sub-module; 140, idle running sub-module; 200, safety control module; 210, starting limit sub-module; 220, starting protection sub-module. Specific embodiments

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figure 1 shown, a hydrogen starting control method for a turbine engine according to some embodiments of the present invention includes a hydrogen supply control method, and the hydrogen supply control method includes: The hydrogen supply control method includes: S1. Motor driving stage: Start the starter, drive the engine to rotate through the starter; according to the engine speed reaching the first speed threshold signal, first turn on the ignition device to ignite, and then turn on the hydrogen supply pipeline; S2. Open-loop control stage: Start hydrogen supply and enter the open-loop control stage; according to the engine speed reaching the second speed threshold signal, stop the open-loop control stage; during the entire process of the open-loop control stage, control the hydrogen flow according to the pre-given relationship between the engine speed and the hydrogen flow rate; S3. Acceleration closed-loop control stage: According to the engine speed reaching the second speed threshold signal, enter the acceleration closed-loop control stage; according to the engine speed reaching the fourth speed threshold signal, stop the acceleration closed-loop control stage; during the entire process of the acceleration closed-loop control stage, control the hydrogen flow according to the pre-given relationship between the engine speed and the hydrogen flow rate; S4. Slow running stage: According to the engine speed reaching the fourth speed threshold signal, the starting motor is turned off, and the engine enters the slow running state.

[0026] In some embodiments of the present invention, in step S1, the time interval between turning on the ignition device and turning on the hydrogen supply pipeline is 1 - 2 s.

[0027] In some embodiments of the present invention, in steps S2 and S3, the relationship between the preset engine speed and the hydrogen flow rate is as follows: When the engine speed is 2000 - 5000 rpm, the hydrogen supply flow rate is less than or equal to 5.5 kg / h and greater than or equal to 0.5 kg / h; When the engine speed is 5000 - 10000 rpm, the hydrogen supply flow rate is less than or equal to 12.5 kg / h and greater than 5.5 kg / h; When the engine speed is 10000 - 18000 rpm, the hydrogen supply flow rate is less than or equal to 17 kg / h and greater than 12.5 kg / h.

[0028] In some embodiments of the present invention, in the acceleration closed - loop control stage, according to the engine speed reaching the third speed threshold signal, the ignition device is stopped.

[0029] In some embodiments of the present invention, in step S3, the acceleration closed - loop control stage, with the rotational speed acceleration as the closed - loop target value, by controlling the hydrogen flow rate, the rotational speed acceleration reaches the expected target value; The present invention does not specifically limit the expected target value of the rotational speed acceleration, and this value is set according to the performance of the specific engine.

[0030] In some embodiments of the present invention, by way of example: The first speed threshold is greater than 2000 rpm; The second speed threshold is greater than 10000 rpm; The third speed threshold is greater than 12000 rpm; The fourth speed threshold is greater than 16500 rpm; In this example, 2000 rpm, 10000 rpm, 12000 rpm, and 16500 rpm are determined through the overall machine experiment results of the turbo hydrogen engine.

[0031] In some embodiments of the present invention, the described starting control method further includes a safety control method, and the safety control method includes a starting limit method; The starting limit method includes: During the starting process of the turbo engine, according to the signal that the engine speed exceeds the limit speed and / or the exhaust gas temperature exceeds the limit temperature, the given speed is locked.

[0032] In certain embodiments of the present invention, the limited rotational speed and the limited temperature are flexibly set according to the comprehensive performance of the engine; Exemplarily, the limited rotational speed is 18000 rpm and the limited temperature is 600 °C.

[0033] In certain embodiments of the present invention, the locking of the given rotational speed is achieved by keeping the hydrogen flow rate and the total hydrogen flow rate unchanged during the acceleration closed-loop control stage; Or it is achieved by reducing the closed-loop hydrogen flow rate and the total hydrogen flow rate.

[0034] In certain embodiments of the present invention, the starting control method further includes a safety control method, and the safety control method includes a starting protection method; The starting protection method includes: Starting the protection stop according to any one of the signals in the starting protection conditions; Wherein, the starting protection conditions include: The exhaust temperature is greater than the safety temperature threshold; The exhaust temperature signal fails; During the closed-loop control stage, the engine speed signal fails; Within the first moment after the engine starts, the ignition of the ignition device is not detected to be successful.

[0035] In certain embodiments of the present invention, the detection of whether the ignition of the ignition device is successful is determined by whether the exhaust temperature exceeds the ignition temperature threshold; If the exhaust temperature exceeds the ignition temperature threshold, it indicates that the ignition of the ignition device is successful; If the exhaust temperature does not exceed the ignition temperature threshold, it indicates that the ignition of the ignition device is not successful.

[0036] In certain embodiments of the present invention, exemplarily, the safety temperature threshold is 1010 °C; the ignition temperature threshold is 50 °C; In this example, the safety temperature threshold of 1010 °C and the ignition temperature threshold of 50 °C are determined by the overall machine test results of the turbo hydrogen engine.

[0037] In certain embodiments of the present invention, exemplarily, the first moment is 30S; In this example, the setting of the 30S first moment is determined by the overall machine test results of the turbo hydrogen engine.

[0038] The hydrogen starting control method of a turbine engine in certain embodiments of the present invention is implemented based on a turbine hydrogen engine improved from a traditional turbine fuel engine. The turbine hydrogen engine: On the basis of the fuel engine, an electronic controller 10, an ignition device 20, a starting motor 60, and an engine 30 (accessories such as a rotational speed sensor and an exhaust gas temperature sensor are retained) are retained. The fuel system is changed to a hydrogen pipeline system 40. For details, see Figure 2 .

[0039] As Figure 2 shown, the hydrogen pipeline system 40 is connected to a hydrogen source 50 through a gas source pipeline 41. The hydrogen pipeline system 40 includes a regulating pipeline 42, a shut-off valve 44, the first pressure sensor 45, a regulating valve 46, and a first pressure sensor 47. The shut-off valve 44, the first pressure sensor 45, the regulating valve 46, and the first pressure sensor 47 are sequentially arranged on the regulating pipeline 42. One end of the regulating pipeline 42 is connected to the gas source pipeline 41, and the other end is connected to a regulated pipeline 43. The regulated pipeline 43 is connected to the engine 30; There are a first electrical signal 11 and a second electrical signal 12 between the electronic controller 10 and the hydrogen pipeline system 40. Among them, the second electrical signal 12 exists between the electronic controller 10 and the shut-off valve 44, and the first electrical signal 12 exists between the electronic controller 10 and the regulating valve 46; There is a third electrical signal 21 between the electronic controller 10 and the ignition device 20; There are a fourth electrical signal 31 and a fifth electrical signal 32 between the electronic controller 10 and the engine 30; There is a sixth electrical signal 61 between the electronic controller 10 and the starting motor 60.

[0040] The shut-off valve 44 is used to open the hydrogen pipeline system 40 to supply hydrogen to the engine 30; The regulating valve 46 is used to regulate the hydrogen flow rate in the hydrogen pipeline system 40; The first electrical signal 11 is an opening hydrogen supply pipeline signal sent by the electronic controller 10 to the shut-off valve 44; The second electrical signal 12 is a regulating hydrogen flow rate signal sent by the electronic controller 10 to the regulating valve 46, and / or a hydrogen flow rate signal sent by the regulating valve 46 to the electronic controller 10; The third electrical signal 21 is an ignition signal sent by the electronic controller 10 to the ignition device 20; The fourth electrical signal 31 is a rotational speed signal sent by the engine 30 (the rotational speed sensor therein) to the electronic controller 10; The fifth electrical signal 32 is an exhaust temperature signal sent by the engine 30 (the exhaust temperature sensor therein) to the electronic controller 10; The sixth electrical signal 61 is a motor control signal (motor on or off signal) sent by the electronic controller 10 to the starting motor 60.

[0041] The following combines Figure 2 the shown device to specifically implement the method in the above embodiment: The hydrogen supply control method includes: S1. Motor driving stage: The electronic controller 10 sends an on signal to the starting motor 60, the starting motor 60 drives the engine 30 to rotate, according to the engine 30 speed reaching the first speed threshold signal, the electronic controller 10 sends an ignition signal to the ignition device 20, turns on the ignition device 20, and then, through the ignition device 20, turns on the hydrogen supply pipeline (that is, the electronic controller 10 sends a hydrogen supply pipeline signal to the stop valve 44, and supplies hydrogen to the engine 30 through the stop valve 44); S2. Open-loop control stage: Start hydrogen supply, and the electronic controller 10 enters the open-loop control stage; the electronic controller 10 stops the open-loop control stage according to the engine speed reaching the second speed threshold signal; during the whole process of the open-loop control stage, the electronic controller 10 controls the hydrogen flow rate according to the pre-given relationship between the engine speed and the hydrogen flow rate (that is, the electronic controller 10 controls the hydrogen flow rate by sending an adjustment signal to the regulating valve 46); S3. Acceleration closed-loop control stage: The electronic controller 10 enters the acceleration closed-loop control stage according to the engine 30 speed reaching the second speed threshold signal (sent by the engine 30), controls the hydrogen flow rate according to the closed-loop stage conditions, the electronic controller 10 stops the ignition device 20 according to the engine 30 speed reaching the third speed threshold signal (sent by the engine 30) (that is, the electronic controller 10 sends a stop ignition signal to the ignition device 20 to turn off the ignition device 20), and continues to control the hydrogen flow rate according to the closed-loop stage conditions, and the electronic controller 10 stops the acceleration closed-loop control stage according to the engine 30 speed reaching the fourth speed threshold signal; S4. Idle running stage: The electronic controller 10 closes the starting motor 60 according to the engine 30 speed reaching the fourth speed threshold signal (sent by the engine 30) (that is, the electronic controller 10 sends a motor off signal to the starting motor 60 to turn off the starting motor 60), and enters the idle running state of the engine 30.

[0042] In step S3, enter the speed open-loop control, take the current actual speed as the target speed, and convert it into the control current of the regulating valve for output.

[0043] Starting limit method, including: During the starting process of the turbine engine, the electronic controller 10 locks the given speed according to the engine speed (sent to the engine 30) exceeding the limit speed and / or the exhaust gas temperature (sent to the engine 30) exceeding the limit temperature signal (that is, the electronic controller 10 sends a signal to lock the given speed to the engine 30, so that the engine speed of the engine 30 does not continue to increase).

[0044] Starting protection method, including: The electronic controller 10 starts the protection shutdown according to any signal in the starting protection conditions; Among them, the starting protection conditions include: The exhaust gas temperature is greater than the safety temperature threshold (sent by the exhaust gas temperature sensor in the engine 30); The exhaust gas temperature signal fails; During the closed-loop control stage, the engine speed signal fails; Within the first moment after the engine starts, the ignition of the ignition device is not detected to be successful.

[0045] Performed Figure 2 The overall machine experiment of the turbine hydrogen engine in

[0046] As Figure 3 shown, a hydrogen starting control system for a turbine engine according to some embodiments of the present invention includes a hydrogen supply control module 100, and the hydrogen supply control module 100 is used to implement a hydrogen control method, including: Motor with rotor module 110: used to start the starter, drive the turbine rotor to rotate through the starter; according to the engine speed reaching the first speed threshold signal, first start the ignition device to ignite, and then open the hydrogen supply pipeline; Speed open-loop control sub-module 120: used to start hydrogen supply and enter the open-loop control stage; according to the engine speed reaching the second speed threshold signal, stop the open-loop control stage; during the entire process of the open-loop control stage, control the hydrogen flow according to the pre-given relationship between the engine speed and the hydrogen flow; Acceleration closed-loop control sub-module 130: used to enter the acceleration closed-loop control stage according to the engine speed reaching the second speed threshold signal; according to the engine speed reaching the fourth speed threshold signal, stop the acceleration closed-loop control stage; during the entire process of the acceleration closed-loop control stage, control the hydrogen flow according to the pre-given relationship between the engine speed and the hydrogen flow; Slow-speed operation sub-module 140: configured to enter the open-loop control phase based on the engine speed to the second speed threshold signal, and control the hydrogen flow rate according to the pre-given relationship between the engine speed and the hydrogen flow rate.

[0047] In some embodiments of the present invention, the hydrogen starting control system further includes a safety control module 200, and the safety control module 200 is configured to implement a safety control method. The safety control module 200 includes a starting limit sub-module 210; The starting limit sub-module 210 is configured to lock the given speed during the starting process of the turbofan engine based on the signal that the engine speed exceeds the limit speed and / or the exhaust gas temperature exceeds the limit temperature.

[0048] In some embodiments of the present invention, for the hydrogen starting control system, the safety control module 200 further includes a starting protection sub-module 220; The starting protection sub-module 220 is configured to initiate a protection shutdown according to any one of the signals in the starting protection conditions.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydrogen starting control method for a turbine engine, characterized in that, It includes a hydrogen supply control method, and the hydrogen supply control method includes: Motor driving stage: Start the starter, and drive the engine to rotate through the starter; According to the engine speed reaching the first speed threshold signal, first turn on the ignition device for ignition, and then turn on the hydrogen supply pipeline; Open-loop control stage: Start hydrogen supply and enter the open-loop control stage; According to the engine speed reaching the second speed threshold signal, stop the open-loop control stage; During the entire process of the open-loop control stage, control the hydrogen flow rate according to the pre-given relationship between the engine speed and the hydrogen flow rate; Acceleration closed-loop control stage: According to the engine speed reaching the second speed threshold signal, enter the acceleration closed-loop control stage; According to the engine speed reaching the fourth speed threshold signal, stop the acceleration closed-loop control stage; During the entire process of the acceleration closed-loop control stage, control the hydrogen flow rate according to the pre-given relationship between the engine speed and the hydrogen flow rate; Idle running stage: According to the engine speed reaching the fourth speed threshold signal, turn off the starting motor and enter the engine idle running state.

2. A hydrogen starting control method for a turbine engine according to claim 1, characterized in that The first speed threshold is greater than 2000 rpm.

3. A hydrogen starting control method for a turbine engine according to claim 1, characterized in that, The second speed threshold is greater than 10000 rpm.

4. A hydrogen start control method for a turbine engine according to claim 1, wherein During the acceleration closed-loop control stage, according to the engine speed reaching the third speed threshold signal, stop the ignition device.

5. A hydrogen starting control method for a turbine engine according to claim 4, characterized in that, The third speed threshold is greater than 12000 rpm; The fourth speed threshold is greater than 16500 rpm.

6. A hydrogen starting control method for a turbine engine according to claim 1, wherein It also includes a safety control method, and the safety control method includes a starting limit method; The starting limit method includes: During the starting process of the turbofan engine, lock the given speed according to the signal that the engine speed exceeds the limit speed and / or the exhaust gas temperature exceeds the limit temperature.

7. A hydrogen starting control method for a turbine engine according to any one of claims 1-6, characterized in that, It also includes a safety control method, and the safety control method includes a starting protection method; The starting protection method includes: Start the protection shutdown according to any signal in the starting protection conditions; Among them, the starting protection conditions include: The exhaust gas temperature is greater than the safety temperature threshold; The exhaust gas temperature signal fails; During the closed-loop control stage, the engine speed signal fails; Within the first period of time after the engine starts, it is not detected that the ignition device ignites successfully.

8. A hydrogen starting control method for a turbine engine according to claim 7, characterized in that, The detection of whether the ignition device ignites successfully is judged by whether the exhaust gas temperature exceeds the ignition temperature threshold; If the exhaust gas temperature exceeds the ignition temperature threshold, it indicates that the ignition device ignites successfully; If the exhaust gas temperature does not exceed the ignition temperature threshold, it indicates that the ignition device does not ignite successfully.

9. A hydrogen starting control method for a turbine engine according to claim 8, characterized in that, The safety temperature threshold is 1010 °C; The ignition temperature threshold is 50 °C.

10. A hydrogen starting control system for a turbine engine, characterized in that, It includes a hydrogen supply control module, and the hydrogen supply control module is used to implement the hydrogen control method, including: Motor driving rotor module: Used to start the starter and drive the turbine rotor to rotate through the starter; According to the engine speed reaching the first speed threshold signal, first turn on the ignition device for ignition, and then turn on the hydrogen supply pipeline; Speed open-loop control sub-module: Used to start hydrogen supply and enter the open-loop control stage; According to the engine speed reaching the second speed threshold signal, stop the open-loop control stage; During the entire process of the open-loop control stage, control the hydrogen flow rate according to the pre-given relationship between the engine speed and the hydrogen flow rate; Acceleration closed-loop control sub-module: It is used to enter the acceleration closed-loop control stage according to the engine speed to the second speed threshold signal; stop the acceleration closed-loop control stage according to the engine speed to the fourth speed threshold signal; during the whole process of the acceleration closed-loop control stage, control the hydrogen flow according to the pre-given relationship between the engine speed and the hydrogen flow rate. Idle running sub-module: It is used to turn off the starting motor according to the engine speed to the fourth speed threshold signal and enter the engine idle running state.

11. A hydrogen starting control system for a turbine engine according to claim 10, characterized in that, It further includes a safety control module, and the safety control module is used to implement a safety control method. The safety control module includes a starting limit sub-module. The starting limit sub-module is used to lock the given speed according to the signal that the engine speed exceeds the limit speed and / or the exhaust gas temperature exceeds the limit temperature during the starting process of the turbine engine.

12. A hydrogen starting control system for a turbine engine according to claim 10 or 11, characterized in that, It further includes a safety control module, and the safety control module is used to implement a safety control method. The safety control module includes a starting protection sub-module. The starting protection sub-module is used to start the protection shutdown according to any one of the signals in the starting protection conditions.

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