CN-122014431-A - Method, device, equipment and medium for switching and controlling combustion mode of hydrogen turbine

CN122014431ACN 122014431 ACN122014431 ACN 122014431ACN-122014431-A

Abstract

Embodiments of the present disclosure disclose methods, apparatus, devices and media related to hydrogen turbine combustion mode switching and control. The method comprises the steps of responding to a collected rotating speed signal to reach a first rotating speed threshold value, executing ignition operation, responding to the rotating speed signal to reach a second rotating speed threshold value, controlling a primary fuel stop valve to introduce primary premixed fuel into a combustion chamber, adjusting a first adjusting valve based on a flame temperature signal, responding to the rotating speed signal to reach a third rotating speed threshold value, adjusting a secondary fuel stop valve and a second adjusting valve, responding to a confirmation signal for identifying stable operation conditions, controlling a duty acceleration stage fuel stop valve to be closed, responding to a flame temperature identification result to identify flame temperature stabilization, and generating a confirmation signal for a full premixed combustion mode. The embodiment realizes the switching of the combustion mode of the hydrogen gas turbine and provides a key technical support for the hydrogen gas turbine to realize low-emission and high-stability operation in a wide working condition range.

Inventors

WANG YONGZHI
JIANG YU
YANG WENKAI

Assignees

无锡明阳氢燃动力科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260401

Claims (9)

1. A method of switching and controlling combustion modes of a hydrogen turbine, comprising: Collecting a rotating speed signal of a rotor of the hydrogen gas turbine in real time; performing an ignition operation in response to the acquired rotational speed signal reaching a first rotational speed threshold; In response to the acquired rotational speed signal reaching a second rotational speed threshold, performing the steps of: Controlling a primary fuel stop valve to introduce primary premixed fuel into the combustion chamber; generating a flame temperature change rate signal based on the acquired flame temperature signal, and carrying out fluctuation identification on the generated flame temperature change rate signal to obtain a fluctuation identification result; Responding to the obtained fluctuation identification result to identify the characteristic fluctuation of the flame temperature which rises and then falls, and adjusting the first adjusting valve; in response to the acquired rotational speed signal reaching a third rotational speed threshold, performing the steps of: Regulating and controlling the secondary fuel stop valve and the second regulating valve; The control method comprises the steps that in response to a confirmation signal identifying a stable operation condition after the secondary fuel stop valve and the second regulating valve are regulated and controlled, the on-duty acceleration stage fuel stop valve is controlled to be closed; performing flame temperature identification on the acquired flame temperature reduction signals to obtain a flame temperature identification result; and responding to the obtained flame temperature identification result to identify that the flame temperature is stable, and generating a full premix combustion mode confirmation signal.
2. The method of claim 1, wherein the generating a flame temperature rate signal based on the acquired flame temperature signal and the wave-recognizing the generated flame temperature rate signal to obtain a wave-recognized result comprise: generating flame temperature time sequence data based on the acquired flame temperature signals; Performing differential processing on the flame temperature time sequence data to obtain flame temperature change rate time sequence data; performing extreme point identification processing on the flame temperature change rate time sequence data to obtain a positive extreme point and a negative extreme point; and generating a fluctuation recognition result based on the obtained positive extreme point and negative extreme point.
3. The method of claim 1, wherein adjusting the first regulator valve in response to the resulting fluctuation identification characterizing a characteristic fluctuation that identifies a rise-then-fall in flame temperature comprises: Generating a temperature deviation signal based on the acquired flame temperature signal and a preset target temperature; Proportional amplification processing is carried out on the temperature deviation signal to obtain a proportional control quantity; performing time integration processing on the temperature deviation signal to obtain an integral control quantity; Performing time differential processing on the temperature deviation signal to obtain differential control quantity; superposing the obtained proportional control quantity, integral control quantity and differential control quantity to obtain PID regulating quantity of the first regulating valve; generating an opening degree adjusting instruction of the first adjusting valve based on the PID adjusting quantity of the first adjusting valve; and controlling a first regulating valve to change the supply flow of the primary premix fuel based on the opening regulating instruction.
4. The method of claim 1, wherein the regulating the secondary fuel shut-off valve and the second regulator valve comprises: Controlling a secondary fuel stop valve to introduce secondary premixed fuel into the combustion chamber; generating pulsating pressure time sequence data of the amplitude of the pulsating pressure changing along with time based on the collected pulsating pressure signals of the combustion chamber; peak detection processing is carried out on the generated pulse pressure time sequence data to obtain a pulse pressure peak value sequence; in response to any of the resulting sequence of pulsating pressure peaks having a pulsating pressure peak exceeding a preset pulsating pressure threshold, performing the steps of: generating a first coordinated adjustment amount of the first adjustment valve and a second coordinated adjustment amount of the second adjustment valve; controlling a first regulating valve to change the supply flow rate of the primary premix fuel based on the first cooperative regulation amount; controlling a second regulating valve to change the supply flow rate of the secondary premix fuel based on the second cooperative regulating amount; generating a second regulating valve involute instruction in response to the collected pulse pressure amplitudes after regulation being lower than the preset pulse pressure threshold value in a first preset time window; generating a second regulating valve involute instruction in response to each pulsating pressure peak value in the obtained pulsating pressure peak value sequence not exceeding the preset pulsating pressure threshold value; and controlling the second regulating valve to be gradually opened based on the generated second regulating valve involute instruction until the corresponding target opening degree is reached.
5. The method of claim 1, wherein the method further comprises: In response to the second fuel shut-off valve and the second regulator valve being adjusted, the following steps are performed in parallel: based on the acquired rotational speed signal, the following steps are performed: Generating a first rotation speed judgment result; Responding to the generated first rotation speed judging result to represent that the rated rotation speed is reached, and collecting each rotation speed instantaneous value in a second preset time window; performing rotational speed instantaneous value processing on each acquired rotational speed instantaneous value to obtain a rotational speed standard deviation in a second preset time window; generating a first stable sub-signal in response to the obtained standard deviation of the rotational speed being less than a preset rotational speed fluctuation threshold; based on the collected fuel total flow signal, the following steps are performed: generating a first flow judgment result; Responding to the generated first flow judgment result to represent that the target flow value is reached, and collecting each flow instantaneous value in a third preset time window; Processing the acquired flow instantaneous values to obtain flow standard deviation in a third preset time window; Generating a second stable sub-signal in response to the obtained flow standard deviation being less than a preset flow fluctuation threshold; based on the collected exhaust gas temperature signal, the following steps are performed: Acquiring each exhaust temperature instantaneous value in a fourth preset time window; Carrying out exhaust temperature instantaneous value processing on each acquired exhaust temperature instantaneous value to obtain an exhaust temperature standard deviation in a fourth preset time window; Generating a third stable sub-signal in response to the obtained standard deviation of the exhaust temperature being less than a preset exhaust temperature fluctuation threshold; and generating a stable operation condition confirmation signal in response to the fact that the generation timestamps corresponding to the first stable sub-signal, the second stable sub-signal and the third stable sub-signal are in the same fifth preset time window.
6. The method of claim 1, wherein the performing flame temperature identification on the collected flame temperature drop signal to obtain a flame temperature identification result comprises: generating flame temperature drop time sequence data based on the collected flame temperature drop signals; Performing sliding window segmentation processing on the flame temperature descending time sequence data to obtain each descending time sequence data subsequence; Respectively carrying out flame temperature sampling point processing on each descending time sequence data subsequence to obtain a flame temperature average value and a flame temperature standard deviation corresponding to each descending time sequence data subsequence; Generating a first stability judgment signal in response to the fact that the average value of the flame temperatures corresponding to the plurality of descending time sequence data subsequences with the continuous first preset subsequence number is lower than a preset average value threshold value of the flame temperatures; generating a second stability judgment signal in response to the fact that the standard deviation of the flame temperature corresponding to the plurality of descending time sequence data subsequences with the continuous second preset subsequence number is lower than a preset flame temperature standard deviation threshold value; And generating a flame temperature identification result representing identification of flame temperature stabilization in response to both the first and second stabilization determination signals having been generated.
7. A hydrogen turbine combustion mode switching and control apparatus comprising: the acquisition unit is configured to acquire a rotating speed signal of the rotor of the hydrogen gas turbine in real time; An ignition unit configured to perform an ignition operation in response to the acquired rotational speed signal reaching a first rotational speed threshold; A first execution unit configured to execute the following steps in response to the acquired rotational speed signal reaching a second rotational speed threshold: Controlling a primary fuel stop valve to introduce primary premixed fuel into the combustion chamber; generating a flame temperature change rate signal based on the acquired flame temperature signal, and carrying out fluctuation identification on the generated flame temperature change rate signal to obtain a fluctuation identification result; Responding to the obtained fluctuation identification result to identify the characteristic fluctuation of the flame temperature which rises and then falls, and adjusting the first adjusting valve; a second execution unit configured to execute the following steps in response to the acquired rotational speed signal reaching a third rotational speed threshold: Regulating and controlling the secondary fuel stop valve and the second regulating valve; The control method comprises the steps that in response to a confirmation signal identifying a stable operation condition after the secondary fuel stop valve and the second regulating valve are regulated and controlled, the on-duty acceleration stage fuel stop valve is controlled to be closed; performing flame temperature identification on the acquired flame temperature reduction signals to obtain a flame temperature identification result; and responding to the obtained flame temperature identification result to identify that the flame temperature is stable, and generating a full premix combustion mode confirmation signal.
8. An electronic device, comprising: one or more processors; a storage device having one or more programs stored thereon; when executed by the one or more processors, causes the one or more processors to implement the method of any of claims 1 to 6.
9. A computer readable medium having stored thereon a computer program, wherein the program when executed by a processor implements the method of any of claims 1 to 6.

Description

Method, device, equipment and medium for switching and controlling combustion mode of hydrogen turbine Technical Field Embodiments of the present disclosure relate to the field of computer technology, and in particular, to a method, apparatus, device, and medium for switching and controlling a combustion mode of a hydrogen turbine. Background With the development of the hydrogen gas turbine towards high efficiency and low emission, the adoption of a staged combustion strategy has become a mainstream technical route for realizing stable combustion under wide working conditions and low emission of nitrogen oxides. In the starting, speed-up and low-load stages, ignition reliability and combustion stability are ensured by on-duty acceleration stage diffusion combustion, and in the medium-high load working condition, the premixed combustion mode is switched to reduce the emission of nitrogen oxides. Under the background, the prior art has developed a control method for triggering the fuel input of each stage based on a rotation speed threshold, and sequentially opening a primary fuel stop valve and a secondary fuel stop valve through preset rotation speed nodes to realize gradual transition from diffusion combustion to premixed combustion. However, when the above-mentioned method is adopted, there is a technical problem that, firstly, after the primary premixed fuel is put into, the flame characteristic in the combustion chamber is changed drastically, the prior art only relies on indirect parameters such as a rotation speed threshold value or an exhaust temperature to judge, and lacks a direct monitoring and identifying means for the transient process of switching the combustion mode, and it is not possible to accurately judge whether the primary premixed combustion is stably established, and if the switching process is not completed, the speed is continuously increased, so that combustion oscillation or even flameout may be caused. Secondly, after the on-duty acceleration grade fuel is closed, the prior art cannot timely confirm whether the combustion is completely converted into a full premix mode, and if the closing time is improper, the emission performance is affected, and the backfire risk is possibly caused. More importantly, in the prior art, the regulation and control of fuels at all levels are mainly open-loop control, and when abnormal fluctuation occurs in combustion, an effective closed-loop regulation mechanism is lacked, so that the characteristics of high flame propagation speed and high reactivity of hydrogen fuel are difficult to adapt. Therefore, there is a need for a combustion mode switching and control method that can identify the switching state in real time based on the directly measured parameters of the combustion chamber and actively adjust the fuel supply. The above information disclosed in this background section is only for enhancement of understanding of the background of the inventive concept and, therefore, may contain information that does not form the prior art that is already known to those of ordinary skill in the art in this country. Disclosure of Invention The disclosure is in part intended to introduce concepts in a simplified form that are further described below in the detailed description. The disclosure is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter. Some embodiments of the present disclosure provide hydrogen turbine combustion mode switching and control methods, apparatus, electronic devices, and computer readable media to address one or more of the technical problems mentioned in the background section above. In a first aspect, some embodiments of the present disclosure provide a method for switching and controlling a combustion mode of a hydrogen turbine, including collecting a rotational speed signal of a rotor of the hydrogen turbine in real time, performing an ignition operation in response to the collected rotational speed signal reaching a first rotational speed threshold, controlling a primary fuel cut-off valve to introduce primary premix fuel into a combustion chamber in response to the collected rotational speed signal reaching a second rotational speed threshold, generating a flame temperature change rate signal based on the collected flame temperature signal, and performing a fluctuation recognition on the generated flame temperature change rate signal to obtain a fluctuation recognition result, adjusting a first regulating valve in response to the obtained fluctuation recognition result to characterize a characteristic fluctuation in which a flame temperature is first raised and then lowered, regulating a secondary fuel cut-off valve and the second regulating valve in response to the collected rotational speed signal reaching a third rotational speed threshold, controlling a shift acceleration stage fuel cut-off valve to close in