Gas turbine combustion mode switching method, device and computer equipment

Abstract

The present disclosure provides a method, apparatus, and computer device for switching the combustion mode of a gas turbine, relating to the technical field of gas turbines. The method comprises: upon receiving a combustion mode switching instruction, determining a target mode to be switched; based on the target mode, determining a first fuel valve and the opening of the first fuel valve corresponding to the target mode; and controlling the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine. Thus, upon receiving the combustion mode switching instruction, the target mode to be switched can be determined, and then the fuel valve ratio can be switched based on the opening of each fuel valve in the target mode to switch the combustion mode of the gas turbine, thereby improving the accuracy and efficiency of switching the combustion mode of the gas turbine.

Description

Technical Field

[0001] The present disclosure relates to the technical field of gas turbines, and in particular to a method, device, and computer equipment for switching combustion modes of a gas turbine. Background Art

[0002] Typically, major gas turbine manufacturers define different combustion modes for the unit, from ignition to base load and then to flameout, based on the technical characteristics of their engines. These modes use different fuel ratios in the fuel valve. Since the transition from one combustion mode to the next involves switching the fuel valve, nitrogen displacement, and air purge, and each of these actions has a strict logical relationship, the failure of any one of these actions can lead to unstable combustion, increased NOx emissions, or even a turbine trip. Based on this background, each engine manufacturer has developed a corresponding combustion mode switching control strategy for its own engines.

[0003] Conventional technologies typically switch combustion modes according to a specific sequence. If a particular sequence is not met, the combustion mode switch is interrupted. This rigid process is inflexible and lacks flexibility in switching between different combustion modes in gas turbines. Therefore, improving the efficiency of combustion mode switching in gas turbines is crucial. Summary of the Invention

[0004] The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] A first embodiment of the present disclosure provides a method for switching a combustion mode of a gas turbine, comprising:

[0006] Upon receiving a combustion mode switching instruction, determining a target mode to be switched;

[0007] determining, based on the target mode, a first fuel valve and an opening degree of the first fuel valve corresponding to the target mode;

[0008] Based on the opening degree of the first fuel valve, the first fuel valve is controlled to switch the combustion mode of the gas turbine.

[0009] Optionally, determining the target mode to be switched includes:

[0010] When the gas turbine is not connected to the grid, determining a target mode to be switched based on a rotation speed value of the gas turbine;

[0011] When the gas turbine is in a grid-connected state, determining a target mode to be switched based on a temperature value or a power value of the gas turbine;

[0012] Optionally, after receiving the combustion mode switching instruction, the method further includes:

[0013] The switching instruction is parsed to determine whether it includes a second fuel valve to be put into use and / or a third fuel valve to be closed, wherein the second fuel valve is a new fuel valve to be put into use in the target mode, and the third fuel valve is a fuel valve that is currently in use and not included in the target mode.

[0014] Optionally, the controlling the first fuel valve based on the opening of the first fuel valve includes:

[0015] In response to a situation in which a second fuel valve to be put into use is included, closing the air purge in the first pipeline corresponding to the second fuel valve;

[0016] Determining that the next process is nitrogen replacement, and performing nitrogen replacement on the first pipeline;

[0017] When nitrogen replacement is completed, determining whether the first pipeline needs to be pre-filled;

[0018] In case pre-filling is required, introducing natural gas into the first pipeline based on the filling amount corresponding to the target mode;

[0019] When pre-filling is completed, the first fuel valve and the second fuel valve are controlled based on the opening degrees of the first fuel valve and the second fuel valve.

[0020] Optionally, the controlling the first fuel valve based on the opening of the first fuel valve includes:

[0021] In response to not including the second fuel valve to be used, determining whether the first pipeline needs to be pre-filled;

[0022] In case pre-filling is required, introducing natural gas into the first pipeline based on the filling amount corresponding to the target mode;

[0023] The first fuel valve is controlled based on the opening degree of the first fuel valve.

[0024] Optionally, after nitrogen replacement is performed on the first pipeline, the method further includes:

[0025] determining whether the first pipeline needs to be pre-filled;

[0026] When the first pipe does not need to be pre-filled, the first fuel valve is controlled based on the opening degree of the first fuel valve.

[0027] Optionally, controlling the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine includes:

[0028] In response to a condition including a third fuel valve to be closed, controlling the third fuel valve to close;

[0029] When the third fuel valve is in a closed state, nitrogen is replaced in a second pipeline corresponding to the third fuel valve to discharge natural gas in the second pipeline;

[0030] When the nitrogen replacement in the second pipeline is completed, the second pipeline is purged with air.

[0031] Optionally, after controlling the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine, the method further includes:

[0032] Receiving a confirmation message returned within a preset time period, determining that the combustion mode switching is successful;

[0033] If no confirmation message is received within the preset time, it is determined that the combustion mode switching has failed, and the target mode is switched again.

[0034] A second embodiment of the present disclosure provides a gas turbine combustion mode switching device, comprising:

[0035] A first determining module is configured to determine a target mode to be switched upon receiving a combustion mode switching instruction;

[0036] a second determining module, configured to determine, based on the target mode, a first fuel valve and an opening degree of the first fuel valve corresponding to the target mode;

[0037] The control module is configured to control the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine.

[0038] Optionally, the first determining module is specifically configured to:

[0039] When the gas turbine is not connected to the grid, determining a target mode to be switched based on a rotation speed value of the gas turbine;

[0040] When the gas turbine is in a grid-connected state, determining a target mode to be switched based on a temperature value or a power value of the gas turbine;

[0041] Optionally, the first determining module is further configured to:

[0042] The switching instruction is parsed to determine whether it includes a second fuel valve to be put into use and / or a third fuel valve to be closed, wherein the second fuel valve is a new fuel valve to be put into use in the target mode, and the third fuel valve is a fuel valve that is currently in use and not included in the target mode.

[0043] Optionally, the control module is specifically configured to:

[0044] In response to a situation in which a second fuel valve to be put into use is included, closing the air purge in the first pipeline corresponding to the second fuel valve;

[0045] Determining that the next process is nitrogen replacement, and performing nitrogen replacement on the first pipeline;

[0046] When nitrogen replacement is completed, determining whether the first pipeline needs to be pre-filled;

[0047] In case pre-filling is required, introducing natural gas into the first pipeline based on the filling amount corresponding to the target mode;

[0048] When pre-filling is completed, the first fuel valve and the second fuel valve are controlled based on the opening degrees of the first fuel valve and the second fuel valve.

[0049] Optionally, the control module is further configured to:

[0050] In response to not including the second fuel valve to be used, determining whether the first pipeline needs to be pre-filled;

[0051] In case pre-filling is required, introducing natural gas into the first pipeline based on the filling amount corresponding to the target mode;

[0052] The first fuel valve is controlled based on the opening degree of the first fuel valve.

[0053] Optionally, the control module is further configured to:

[0054] determining whether the first pipeline needs to be pre-filled;

[0055] When the first pipe does not need to be pre-filled, the first fuel valve is controlled based on the opening degree of the first fuel valve.

[0056] Optionally, the control module is further configured to:

[0057] In response to a condition including a third fuel valve to be closed, controlling the third fuel valve to close;

[0058] When the third fuel valve is in a closed state, nitrogen is replaced in a second pipeline corresponding to the third fuel valve to discharge natural gas in the second pipeline;

[0059] When the nitrogen replacement in the second pipeline is completed, the second pipeline is purged with air.

[0060] Optionally, the control module is further configured to:

[0061] A confirmation message is received within a preset time period, confirming that the combustion mode switch is successful;

[0062] If no confirmation message is received within the preset time, it is determined that the combustion mode switching has failed, and the target mode switching is performed again.

[0063] The third embodiment of the present disclosure proposes a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for switching the combustion mode of a gas turbine proposed in the first embodiment of the present disclosure is implemented.

[0064] The fourth embodiment of the present disclosure proposes a non-temporary computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for switching the combustion mode of a gas turbine as proposed in the first embodiment of the present disclosure.

[0065] The fifth embodiment of the present disclosure proposes a computer program product. When the instruction processor in the computer program product executes, the method for switching the gas turbine combustion mode proposed in the first embodiment of the present disclosure is executed.

[0066] The gas turbine combustion mode switching method, apparatus, and computer device provided herein can, upon receiving a combustion mode switching instruction, determine a target mode to be switched, then, based on the target mode, determine a first fuel valve and the opening of the first fuel valve corresponding to the target mode, and then, based on the opening of the first fuel valve, control the first fuel valve to achieve switching of the gas turbine combustion mode. Thus, upon receiving a combustion mode switching instruction, the target mode to be switched can be determined, and then, the fuel valve ratios can be switched based on the openings of the fuel valves in the target mode to achieve switching of the gas turbine combustion mode, thereby improving the accuracy and efficiency of switching of the gas turbine combustion mode.

[0067] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0069] Figure 1 A schematic flow chart of a method for switching a combustion mode of a gas turbine provided in one embodiment of the present disclosure;

[0070] Figure 2 A schematic flow chart of a method for switching a combustion mode of a gas turbine provided by another embodiment of the present disclosure;

[0071] Figure 3 A schematic flow chart of a method for switching a combustion mode of a gas turbine provided in one embodiment of the present disclosure;

[0072] Figure 4 A schematic diagram of a switching process of a gas turbine combustion mode provided by an embodiment of the present disclosure;

[0073] Figure 5 A schematic diagram of switching between combustion modes of a gas turbine provided by an embodiment of the present disclosure;

[0074] Figure 6 A schematic structural diagram of a gas turbine combustion mode switching device provided by another embodiment of the present disclosure;

[0075] Figure 7 A block diagram of an exemplary computer device suitable for implementing embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0076] The following describes in detail embodiments of the present disclosure, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present disclosure, and should not be construed as limiting the present disclosure.

[0077] The following describes a method, apparatus, and computer device for switching a combustion mode of a gas turbine according to an embodiment of the present disclosure with reference to the accompanying drawings.

[0078] The embodiment of the present disclosure uses the example of the method for switching the gas turbine combustion mode being configured in a switching device for the gas turbine combustion mode. The switching device for the gas turbine combustion mode can be applied to any computer device so that the computer device can perform the switching function of the gas turbine combustion mode.

[0079] Among them, the computer device can be a personal computer (PC), a cloud device, a mobile device, etc., and the mobile device can be, for example, a mobile phone, a tablet computer, a personal digital assistant, a wearable device, a car-mounted device, and other hardware devices with various operating systems, touch screens and / or display screens.

[0080] Figure 1 A schematic flow chart of a method for switching the combustion mode of a gas turbine provided in an embodiment of the present disclosure.

[0081] like Figure 1 As shown, the method for switching the combustion mode of the gas turbine may include the following steps:

[0082] Step 101: upon receiving a combustion mode switching instruction, determining a target mode to be switched.

[0083] It's understandable that a gas turbine may have multiple combustion modes during operation. Switching between combustion modes may involve the switching of various fuel valves, nitrogen displacement, and air purges. Typically, combustion turbines must switch combustion modes in a specific sequence. If a particular sequence is incorrect, the combustion mode switch will be aborted, resulting in lower efficiency in the gas turbine's combustion mode switching.

[0084] Therefore, in the embodiment of the present disclosure, when a combustion mode switching instruction is received, the target mode to be switched can be determined, and then the corresponding mode switching can be performed based on the target mode to be switched, which is not limited by the present disclosure.

[0085] Optionally, the combustion mode switching instruction may also include a target mode to be switched, so that the target mode to be switched can be determined by parsing the combustion mode switching instruction.

[0086] Optionally, when the gas turbine is not in a grid-connected state, the target mode to be switched may also be determined based on the rotational speed value of the gas turbine.

[0087] It is understood that different combustion modes typically correspond to different speed ranges or speed values. For example, different correspondences between combustion modes and speed ranges can be set. Thus, in the disclosed embodiment, based on the speed value at the time the combustion mode switching command is received, the preset correspondences can be traversed to determine the target mode corresponding to the current speed value.

[0088] In addition, for example, the speed value of the gas turbine may be obtained through a speed sensor, or the speed value of the gas turbine may be determined through any other desirable method, etc., and the present disclosure does not limit this.

[0089] For example, the speed range corresponding to combustion mode 1 is: , the speed range corresponding to combustion mode 1 is: , the speed range corresponding to combustion mode three is: , The speed range corresponding to combustion mode 4 is: If the current gas turbine speed is: , which is between and , then it can be determined that the target mode to be switched is: combustion mode three.

[0090] It should be noted that the above examples are merely illustrative and cannot be used as limitations on the speed range, target mode, etc. corresponding to each combustion mode in the embodiments of the present disclosure.

[0091] Optionally, when the gas turbine is in a grid-connected state, the target mode to be switched may be determined based on a temperature value or a power value of the gas turbine.

[0092] The temperature value may be measured by a temperature sensor, or may be calculated by other formulas, etc., and the present disclosure does not limit this.

[0093] In addition, the power value can be measured by a power sensor, or can be obtained by calculating the voltage value, current value, etc., and the present disclosure does not limit this.

[0094] It is understood that a first correspondence table between different combustion modes and temperature ranges, and a second correspondence table between different combustion modes and temperature ranges, may also be pre-set. Thus, in the disclosed embodiment, based on the temperature value at the time the combustion mode switching command is received, the preset first correspondence table may be traversed to determine the target mode corresponding to the current temperature value. Alternatively, based on the power value at the time the combustion mode switching command is received, the preset second correspondence table may be traversed to determine the target mode corresponding to the current power value, and so on. This disclosure is not limited to this.

[0095] Step 102 : Based on the target mode, determine the first fuel valve and the opening degree of the first fuel valve corresponding to the target mode.

[0096] Among them, the fuel valves corresponding to different combustion modes may be the same or different; the fuel valve corresponding to any combustion mode may be one or more; the openings corresponding to different fuel valves in different combustion modes may be the same or different, etc., and the present disclosure does not limit this.

[0097] Optionally, a relationship table between the first fuel valves and the openings of the first fuel valves corresponding to different combustion modes can be set in advance. After determining the target mode, the relationship table can be traversed based on the target mode to determine the corresponding first fuel valves and the openings corresponding to each first fuel valve.

[0098] For example, if the relationship between the first fuel valve and the opening degree of the first fuel valve corresponding to different preset combustion modes is shown in Table 1 below, if the target mode is determined to be combustion mode 2, then the corresponding first fuel valve and opening degrees can be determined as: first fuel valve opening 1: 10%, first fuel valve opening 2: 70%, and first fuel valve opening 4: 20%, respectively.

[0099] Table 1

[0100]

[0101] It should be noted that the above examples are merely illustrative and cannot be used as limitations on the target mode, the first fuel valve, the opening degree, etc. in the embodiments of the present disclosure.

[0102] Step 103 : Based on the opening of the first fuel valve, the first fuel valve is controlled to switch the combustion mode of the gas turbine.

[0103] It is understandable that the first fuel valve can be controlled based on the opening degree of the first fuel valve to achieve switching of the first fuel valve ratio, thereby achieving switching of the gas turbine combustion mode.

[0104] For example, if the target mode corresponds to a first fuel valve opening of 20%, and the current first fuel valve opening is 10%, then the first fuel valve opening can be increased to 20%. Alternatively, if the target mode corresponds to a first fuel valve opening of 30%, and the current first fuel valve opening is 50%, then the first fuel valve opening can be decreased to 30%, and so on. This disclosure is not limited to this.

[0105] In an embodiment of the present disclosure, upon receiving a combustion mode switching instruction, a target mode to be switched to can be determined. Based on the target mode, a first fuel valve and the opening of the first fuel valve corresponding to the target mode can be determined. Based on the opening of the first fuel valve, the first fuel valve can be controlled to switch the combustion mode of the gas turbine. Thus, upon receiving a combustion mode switching instruction, the target mode to be switched to can be determined. The fuel valve ratios can then be switched based on the openings of the fuel valves in the target mode to switch the combustion mode of the gas turbine, thereby improving the accuracy and efficiency of switching the combustion modes of the gas turbine.

[0106] Figure 2A flow chart of a method for switching a combustion mode of a gas turbine provided in an embodiment of the present disclosure is shown as follows: Figure 2 As shown, the method for switching the combustion mode of the gas turbine may include the following steps:

[0107] Step 201: upon receiving a combustion mode switching instruction, determining a target mode to be switched.

[0108] Step 202: parse the switching instruction to determine whether it includes the second fuel valve to be put into use and / or the third fuel valve to be closed.

[0109] Among them, the second fuel valve may be a new fuel valve to be put into use in the target mode, the third fuel valve may be a fuel valve that is currently in use and not included in the target mode, and so on. This disclosure does not limit this.

[0110] It is understandable that the identification or presentation form of each fuel valve may be set in advance, such as X1, X2, G1, G3, etc., and the present disclosure does not limit this.

[0111] For example, if the switching instruction is parsed to determine that the fuel valves included therein are represented as X1 and G2, then the second fuel valve to be used can be determined to be X1, the third fuel valve to be closed can be determined to be G2, and so on, which is not limited in this disclosure.

[0112] Step 203 : In response to the second fuel valve to be put into use, closing the air purge in the first pipeline corresponding to the second fuel valve.

[0113] It is understandable that, in the target mode, when there is a new fuel valve to be put into use, that is, a second fuel valve to be put into use, the air in the first pipeline corresponding to the second fuel valve can usually be closed and blown gently.

[0114] It is understandable that there may be one or more second fuel valves, that is, there may be one or more new fuel valves to be put into use, and so on, which is not limited in the present disclosure.

[0115] For example, when the new fuel valves to be put into use are: the second fuel valve and the second fuel valve, the air purge in the first pipeline corresponding to the second fuel valve and the air purge in the first pipeline corresponding to the second fuel valve can be closed respectively, and the present disclosure does not limit this.

[0116] Step 204 , determining that the next process is nitrogen replacement, and performing nitrogen replacement on the first pipeline.

[0117] It can be understood that when the combustion mode switching instruction includes a second fuel valve to be put into use, the air purge in the first pipeline corresponding to the second fuel valve can be closed first, and then the next process can be further determined to be a nitrogen replacement process, and the first pipeline can be replaced with nitrogen to discharge the air in the first pipeline, so that the gas in the first pipeline is nitrogen, which provides conditions for the normal use of the subsequent gas turbine.

[0118] Step 205: When the nitrogen replacement is completed, determine whether the first pipeline needs to be pre-filled.

[0119] It is understandable that after closing the air purge in the first pipeline corresponding to the second fuel valve to be put into use and completing the nitrogen replacement, it is possible to further determine whether the first pipeline needs to be pre-filled, thereby providing conditions for the commissioning of the new fuel valve.

[0120] Step 206 : If pre-filling is required, natural gas is introduced into the first pipeline based on the filling amount corresponding to the target mode.

[0121] Among them, in different target modes, the filling amounts corresponding to different pipes may be the same, or may be different, etc., and this disclosure does not limit this.

[0122] Therefore, in the embodiment of the present disclosure, the relationship between each pipeline and the filling amount in each mode can be set in advance. When pre-filling is required, the corresponding filling amount can be determined based on the determined target mode and the corresponding pipeline. Then, natural gas can be introduced into the corresponding first pipeline according to the determined filling amount.

[0123] In addition, the filling amount can also be understood as the filling time, filling flow rate, etc., which is not limited in this disclosure.

[0124] For example, in combustion mode 1, the corresponding filling amount of the first pipe is: 2 minutes of filling required; in combustion mode 1, the corresponding filling amount of the first pipe is: 5 minutes of filling required; in combustion mode 2, the corresponding filling amount of the first pipe is: 3 minutes of filling required; in combustion mode 2, the corresponding filling amount of the first pipe is: 4 minutes of filling required, etc. If the current target mode is determined to be combustion mode 1 and the first pipe, then the corresponding filling amount can be determined to be: 5 minutes of filling required, after which natural gas can be introduced into the first pipe for 5 minutes, etc., and this disclosure is not limited to this.

[0125] In step 207 , when the pre-filling is completed, the first fuel valve and the second fuel valve are controlled based on the opening degrees of the first fuel valve and the second fuel valve.

[0126] For example, at the end of pre-filling, if the opening of the first fuel valve in the current mode is 10%, and the corresponding openings of the first fuel valve in the target mode are 20% and 30%, the opening of the first fuel valve can be controlled to increase to 20%, and the opening of the second fuel valve can be controlled to increase to 30%. Alternatively, at the end of pre-filling, if the opening of the first fuel valve in the current mode is 40%, and the corresponding openings of the first fuel valve in the target mode are 15% and 10%, the opening of the first fuel valve can be controlled to decrease to 15%, and the opening of the second fuel valve can be controlled to increase to 10%.

[0127] It should be noted that the above examples are merely illustrative and cannot be used as limitations on the opening degrees of the first fuel valve and the second fuel valve in the embodiments of the present disclosure.

[0128] In step 208 , when the first pipeline does not need to be pre-filled, the first fuel valve and the second fuel valve are controlled based on the openings of the first fuel valve and the second fuel valve.

[0129] It can be understood that when the first pipeline needs to be pre-filled, the first pipeline can be pre-filled according to the corresponding filling amount. After the pre-filling is completed, the first fuel valve and the second fuel valve can be controlled separately based on the opening of the first fuel valve and the second fuel valve; if the first pipeline does not need to be pre-filled, the pre-filling process can be skipped directly and the next operation can be carried out. For example, the first fuel valve and the second fuel valve can be controlled separately based on the opening of the first fuel valve and the second fuel valve, etc. The present disclosure does not limit this.

[0130] Alternatively, if it is determined that the combustion mode switching instruction does not include the second fuel valve to be put into use, it can be determined first whether the first pipeline needs to be pre-filled. If pre-filling is required, natural gas can be introduced into the first pipeline based on the filling amount corresponding to the target mode, and then the first fuel valve and the second fuel valve can be controlled separately based on the openings of the first fuel valve and the second fuel valve. Correspondingly, if the first pipeline does not need to be pre-filled, the first fuel valve and the second fuel valve can be directly controlled separately based on the openings of the first fuel valve and the second fuel valve. Thus, in the embodiment of the present disclosure, the combustion mode switching instruction can be parsed first to determine whether it includes a new fuel valve to be put into use. If it includes a new fuel valve to be put into use, the air in the first pipeline corresponding to the fuel valve can be closed and purged, and then nitrogen replacement can be performed, and it can be determined whether pre-filling is required. If pre-filling is required, it can be filled according to the corresponding filling amount. After filling is completed, control is performed based on the openings of each fuel valve. Alternatively, if, after parsing the combustion mode switching instruction, it is determined that the instruction does not include the second fuel valve to be used, the air purge closing step can be skipped, and a determination can be made as to whether nitrogen replacement is required. If nitrogen replacement is not required, a determination can be made as to whether pre-filling is required. If pre-filling is not required, each fuel valve can be controlled based on its opening degree. Thus, in the disclosed embodiment, a determination can be made for each operation, and if a particular operation is not required, that operation can be skipped and the next operation can be performed, thereby improving the flexibility and accuracy of switching the combustion mode of the gas turbine.

[0131] In an embodiment of the present disclosure, upon receiving a combustion mode switching instruction, a target mode to be switched to can be determined. The switching instruction can then be parsed to determine whether it includes a second fuel valve to be put into use and / or a third fuel valve to be closed. If the second fuel valve to be put into use is included, the air purge in the first pipeline corresponding to the second fuel valve is closed. The next process can then be determined to be nitrogen replacement, and nitrogen replacement is performed on the first pipeline. When the nitrogen replacement is completed, it is determined whether the first pipeline needs to be pre-filled. If pre-filling is required, natural gas is introduced into the first pipeline based on the filling amount corresponding to the target mode. When pre-filling is completed, the first fuel valve and the second fuel valve are controlled based on the openings of the first and second fuel valves. Thus, upon receiving a combustion mode switching instruction, the instruction can be parsed to determine whether it includes a second fuel valve to be put into use and / or a third fuel valve to be closed. Each step can then be judged and the next step to be performed can be determined based on the conditions of each step. If a step is not required, it can be skipped and the next operation can be performed, thereby improving the flexibility and accuracy of the combustion mode switching of the gas turbine.

[0132] Figure 3 A flow chart of a method for switching a combustion mode of a gas turbine provided in an embodiment of the present disclosure is shown as follows: Figure 3 As shown, the method for switching the combustion mode of the gas turbine may include the following steps:

[0133] Step 301: upon receiving a combustion mode switching instruction, determining a target mode to be switched.

[0134] Step 302: parse the switching instruction to determine whether it includes the second fuel valve to be put into use and / or the third fuel valve to be closed.

[0135] Among them, the second fuel valve is a new fuel valve to be put into use in the target mode, the third fuel valve is a fuel valve that is currently put into use and is not included in the target mode, and so on. This disclosure does not limit this.

[0136] Step 303: If a third fuel valve to be closed is included, control the third fuel valve to be closed.

[0137] It can be understood that when the combustion mode switching instruction is parsed and it is determined that the third fuel valve to be closed is included, that is, the third fuel valve is not needed in the target mode, the third fuel valve can be controlled to close to meet the combustion mode of the gas turbine.

[0138] Step 304 : When the third fuel valve is in a closed state, nitrogen is replaced in the second pipeline corresponding to the third fuel valve to discharge the natural gas in the second pipeline.

[0139] Optionally, when the third fuel valve is in a closed state, it can be determined whether nitrogen replacement is required in the second pipeline corresponding to the third fuel valve. If nitrogen replacement is required, nitrogen can be introduced into the second pipeline to discharge the natural gas in the second pipeline, etc. The present disclosure does not limit this.

[0140] Step 305: When the nitrogen replacement in the second pipeline is completed, the second pipeline is purged with air.

[0141] It can be understood that after the nitrogen replacement in the second pipe is completed, it can be further determined whether the second pipe needs to be purged with air. If air purging is required, the second pipe is purged with air; if air purging is not required, the air purging step can be skipped, and then it can be determined that the combustion mode switching is completed. The present disclosure does not limit this.

[0142] Optionally, when the third fuel valve is in the closed state, it can be determined whether nitrogen replacement is required in the second pipeline corresponding to the third fuel valve. If nitrogen replacement is not required, it can be further determined whether air purge is required in the second pipeline. If air purge is required, the second pipeline is purged with air. If air purge is not required, the air purge step can be skipped, and the combustion mode switching can be considered complete. This disclosure is not limited to this.

[0143] Optionally, if a confirmation message is received within a preset time after any step is executed, it can be determined that the step has been successfully executed; alternatively, if no confirmation message is received within a preset time after any step is executed, it can be determined that the step has failed to execute. In this case, it can be considered that the combustion mode switch has failed, and the target mode can be switched again.

[0144] The method for switching the combustion mode of a gas turbine provided in the present disclosure can be applied to any type of gas turbine, and the present disclosure does not limit this.

[0145] The following combination Figure 4 The flowchart shown illustrates the switching process of the gas turbine combustion mode provided by the present disclosure.

[0146] For example, the gas turbine is currently in combustion mode 1. After receiving the combustion mode switching instruction, the first step may be to determine whether it is necessary to turn off the air purge before switching. If it is necessary to turn off the air purge, the air purge can be turned off. Then, the second step may be performed to determine whether nitrogen replacement is required before switching. If it is not necessary to turn off the air purge in step 1, then the second step may be performed directly to determine whether nitrogen replacement is required before switching. If nitrogen replacement is required, nitrogen replacement can be performed first, and after the nitrogen replacement is completed, the third step may be performed to determine whether pre-filling is required before switching. If it is determined in step 2 that nitrogen replacement is not required, then the third step may be performed directly to determine whether pre-filling is required before switching. If it is determined in step 3 that pre-filling is required, pre-filling can be performed first, and after the pre-filling is completed, the fourth step may be performed to determine whether the fuel valve ratio needs to be switched. If pre-filling is not required in step 3, then the fourth step may be performed directly to determine whether the fuel valve ratio needs to be switched. If the fuel valve ratio does not need to be switched, or the fuel valve ratio has been switched, you can proceed to step 5 to determine whether nitrogen replacement is required after the switch. If nitrogen replacement is not required, you can directly proceed to step 6 to determine whether air purge is required after the switch. If nitrogen replacement is required, then nitrogen replacement should be performed first. After the nitrogen replacement is completed, proceed to step 6 to determine whether air purge is required after the switch. If air purge is not required, the combustion mode switch can be considered complete. If air purge is required, the combustion mode switch can be considered complete after the air purge is completed.

[0147] Optionally, if in step 1, it is determined that the air purge needs to be turned off before switching, then a command to turn off the air purge can be sent. If feedback that the air purge has been turned off is received within the preset time, then it can be considered that the air purge has been successfully turned off; if feedback that the air purge has been turned off is not received within the preset time, then it can be considered that the air purge has failed, and then an attempt to turn off the air purge can be made again. If it still fails, the combustion mode switch can be stopped.

[0148] Optionally, if in step 2, it is determined that nitrogen replacement is required before switching, then a nitrogen replacement instruction can be sent. If feedback indicating that the nitrogen replacement has been completed is received within the preset time, then the nitrogen replacement can be considered to have been successfully completed; if feedback indicating that the nitrogen replacement has been completed is not received within the preset time, then the nitrogen replacement can be considered to have failed, and then the nitrogen replacement attempt can be made again. If it is still unsuccessful, the combustion mode switch can be stopped.

[0149] Optionally, if in step 3 it is determined that pre-filling is required before switching, a pre-filling instruction can be sent. If feedback indicating that the pre-filling is completed is received within a preset time period, the pre-filling can be considered to have been successfully completed. If feedback indicating that the pre-filling is completed is not received within the preset time period, the pre-filling can be considered to have failed. Then, another pre-filling attempt can be made. If it still fails, the combustion mode switch can be stopped.

[0150] Optionally, if in step 4, it is determined that a fuel valve ratio switching is required, then a fuel valve ratio switching instruction can be sent. If feedback indicating that the fuel valve ratio switching is completed is received within the preset time, then the fuel valve ratio switching can be considered to have been successfully completed. If feedback indicating that the fuel valve ratio switching is completed is not received within the preset time, then the fuel valve ratio switching can be considered to have failed. Then, the fuel valve ratio switching attempt can be made again. If it still fails, the combustion mode switching can be stopped.

[0151] Optionally, if in step 5, it is determined that nitrogen replacement is required after switching, then a nitrogen replacement instruction can be sent. If feedback that the nitrogen replacement is completed is received within the preset time, then the nitrogen replacement can be considered to have been successfully completed; if feedback that the nitrogen replacement is completed is not received within the preset time, then the nitrogen replacement can be considered to have failed, and then the nitrogen replacement attempt can be made again. If it is still unsuccessful, the combustion mode switch can be stopped.

[0152] Optionally, if in step 6, it is determined that the air purge needs to be turned on after the switch, then an air purge turn-on instruction can be sent. If feedback that the air purge has been turned on is received within the preset time, then the air purge can be considered to have been successfully turned on; if feedback that the air purge has been turned on is not received within the preset time, then the air purge turn-on can be considered to have failed, and then the air purge turn-on attempt can be made again. If it still fails, the combustion mode switch can be stopped.

[0153] It is understandable that for different combustion modes, the switching instruction is triggered only when the conditions are met. Figure 5 In the schematic diagram shown, if the gas turbine is currently in the combustion mode initial state and the conditions for switching to combustion mode 1 are met, a switching instruction can be triggered, and the combustion mode switching can be achieved through the operations of steps 1-6 described above. Alternatively, if the gas turbine is currently in combustion mode 3 and the conditions for switching to combustion mode 2 are met, a switching instruction can be triggered, and the combustion mode switching can be achieved through the operations of steps 1-6 described above, and so on. This disclosure is not limited to this.

[0154] Optionally, in actual applications, different combustion mode switches can share the same combustion mode switching sequence control main program. The differences are reflected in the action scenarios of the sequence control instructions and the judgment scenarios of the sequence control feedback. When performing combustion mode switching, the main program can be called repeatedly. The main program is designed with 6 steps. The instructions of each step implement the control function of that step. The next step can be executed only after each step is completed. The status of each step can be judged. If the feedback does not return according to the design requirements, it will be judged as a fault.

[0155] For example, combining Figure 4 As can be seen, in step 1, the air purge is turned off before switching. If a fuel valve in a pipeline needs to be put into use when switching from combustion mode X to combustion mode X+1, the air purge of this fuel pipeline must be turned off before opening this fuel valve. The switch command from combustion mode X to combustion mode X+1 must be included in the judgment instruction for turning off the air purge. If no new fuel valve is put into use when switching from combustion mode Y to combustion mode Y+1, the air purge does not need to be turned off before switching, and this step is skipped directly.

[0156] Step 2: Perform nitrogen replacement before switching. If the air purge needs to be turned off in the first step, then nitrogen replacement is usually required before the fuel valve is added. In this case, the switching instruction from combustion mode X to combustion mode X+1 needs to be included in the judgment instruction for nitrogen replacement. If nitrogen replacement is not required before switching from combustion mode Y to combustion mode Y+1, this step is skipped directly.

[0157] Step 3: Pre-fill before switching. If pre-fill is required before switching from combustion mode X to combustion mode X+1, the pre-fill amount needs to be calculated based on the corresponding filling amount requirements under the target combustion mode X+1. If pre-fill is not required before switching from combustion mode Y to combustion mode Y+1, this step is skipped.

[0158] Step 4: Switch the fuel valve ratio. Under different combustion modes, the ratio requirements of each fuel control valve are different. When switching the fuel valve ratio, set the opening or flow of each fuel control valve according to the specific combustion mode.

[0159] Step 5: Perform nitrogen replacement after switching. If nitrogen replacement is required after switching from combustion mode X to combustion mode X+1, the switching instruction from combustion mode X to combustion mode X+1 must be included in the nitrogen replacement judgment instruction. If nitrogen replacement is not required after switching from combustion mode Y to combustion mode Y+1, this step is skipped.

[0160] Step 6: Perform air purge after switching. If air purge needs to be turned on after switching from combustion mode X to combustion mode X+1, the judgment instruction for turning on air purge needs to include the switching instruction from combustion mode X to combustion mode X+1. If air purge does not need to be turned on after switching from combustion mode Y to combustion mode Y+1, this step is skipped.

[0161] Therefore, in the embodiment of the present disclosure, a sequential control method can be used to judge each of the above steps 1-6 to achieve combustion mode switching, which is conducive to the standardized design of the combustion mode switching program, improves the integrity and reliability of the program design, and is also conducive to improving the maintainability of the program and improving debugging efficiency.

[0162] It should be noted that the above examples are merely illustrative and cannot be used as a limitation on the combustion mode switching process, etc. in the embodiments of the present disclosure.

[0163] The embodiment of the present disclosure can determine the target mode to be switched when receiving a combustion mode switching instruction, and then parse the switching instruction to determine whether it contains the second fuel valve to be put into use and / or the third fuel valve to be closed. Then, by parsing the switching instruction, it can be determined whether it contains the second fuel valve to be put into use and / or the third fuel valve to be closed. In the case where the third fuel valve to be closed is included, the third fuel valve is controlled to be closed. When the third fuel valve is in the closed state, the second pipeline corresponding to the third fuel valve is replaced with nitrogen to discharge the natural gas in the second pipeline. When the nitrogen replacement in the second pipeline is completed, the second pipeline is purged with air. Therefore, when receiving a combustion mode switching instruction, the combustion mode can be switched by judging each step in the switching process, thereby improving the flexibility of the combustion mode switching.

[0164] In order to implement the above embodiment, the present disclosure also proposes a switching device for a gas turbine combustion mode.

[0165] Figure 6 A schematic structural diagram of a gas turbine combustion mode switching device provided in an embodiment of the present disclosure.

[0166] like Figure 6 As shown, the gas turbine combustion mode switching device 100 may include: a first determination module 110 , a second determination module 120 and a control module 130 .

[0167] The first determining module 110 is configured to determine a target mode to be switched to upon receiving a combustion mode switching instruction.

[0168] The second determining module 120 is configured to determine, based on the target mode, a first fuel valve and an opening degree of the first fuel valve corresponding to the target mode.

[0169] The control module 130 is configured to control the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine.

[0170] Optionally, the first determining module 110 is specifically configured to:

[0171] When the gas turbine is not connected to the grid, determining a target mode to be switched based on a rotation speed value of the gas turbine;

[0172] When the gas turbine is in a grid-connected state, determining a target mode to be switched based on a temperature value or a power value of the gas turbine;

[0173] Optionally, the first determining module 110 is further configured to:

[0174] The switching instruction is parsed to determine whether it includes a second fuel valve to be put into use and / or a third fuel valve to be closed, wherein the second fuel valve is a new fuel valve to be put into use in the target mode, and the third fuel valve is a fuel valve that is currently in use and not included in the target mode.

[0175] Optionally, the control module 130 is specifically configured to:

[0176] In response to a situation in which a second fuel valve to be put into use is included, closing the air purge in the first pipeline corresponding to the second fuel valve;

[0177] Determining that the next process is nitrogen replacement, and performing nitrogen replacement on the first pipeline;

[0178] When nitrogen replacement is completed, determining whether the first pipeline needs to be pre-filled;

[0179] In case pre-filling is required, introducing natural gas into the first pipeline based on the filling amount corresponding to the target mode;

[0180] When pre-filling is completed, the first fuel valve and the second fuel valve are controlled based on the opening degrees of the first fuel valve and the second fuel valve.

[0181] Optionally, the control module 130 is further configured to:

[0182] In response to not including the second fuel valve to be used, determining whether the first pipeline needs to be pre-filled;

[0183] In case pre-filling is required, introducing natural gas into the first pipeline based on the filling amount corresponding to the target mode;

[0184] The first fuel valve is controlled based on the opening degree of the first fuel valve.

[0185] Optionally, the control module 130 is further configured to:

[0186] determining whether the first pipeline needs to be pre-filled;

[0187] When the first pipe does not need to be pre-filled, the first fuel valve is controlled based on the opening degree of the first fuel valve.

[0188] Optionally, the control module 130 is further configured to:

[0189] In response to a condition including a third fuel valve to be closed, controlling the third fuel valve to close;

[0190] When the third fuel valve is in a closed state, nitrogen is replaced in a second pipeline corresponding to the third fuel valve to discharge natural gas in the second pipeline;

[0191] When the nitrogen replacement in the second pipeline is completed, the second pipeline is purged with air.

[0192] Optionally, the control module 130 is further configured to:

[0193] A confirmation message is received within a preset time period, confirming that the combustion mode switch is successful;

[0194] If no confirmation message is received within the preset time, it is determined that the combustion mode switching has failed, and the target mode switching is performed again. The functions and specific implementation principles of the above modules in the embodiment of the present disclosure can refer to the above method embodiments and will not be repeated here.

[0195] The switching device for the combustion mode of a gas turbine according to an embodiment of the present disclosure can determine the target mode to be switched upon receiving a combustion mode switching instruction, and then determine the first fuel valve and the opening of the first fuel valve corresponding to the target mode based on the target mode, and then control the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine. Thus, after receiving the combustion mode switching instruction, the target mode to be switched can be determined, and then the fuel valve ratio can be switched based on the opening of each fuel valve under the target mode to switch the combustion mode of the gas turbine, thereby improving the accuracy and efficiency of switching the combustion mode of the gas turbine. To implement the above embodiment, the present disclosure also proposes a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for switching the combustion mode of the gas turbine according to the above embodiment of the present disclosure is implemented.

[0196] In order to implement the above embodiments, the present disclosure further proposes a non-transitory computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for switching the combustion mode of a gas turbine as proposed in the above embodiments of the present disclosure.

[0197] In order to implement the above embodiments, the present disclosure further proposes a computer program product. When the instruction processor in the computer program product executes, the method for switching the combustion mode of a gas turbine proposed in the above embodiments of the present disclosure is executed.

[0198] Figure 7 A block diagram of an exemplary computer device suitable for implementing embodiments of the present disclosure is shown. Figure 7 The computer device 12 shown is only an example and should not bring any limitation to the functionality and scope of use of the embodiments of the present disclosure.

[0199] like Figure 7 As shown, computer device 12 is implemented as a general-purpose computing device. Components of computer device 12 may include, but are not limited to, one or more processors or processing units 16, system memory 28, and a bus 18 that connects various system components (including system memory 28 and processing unit 16).

[0200] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor, or a local bus using any of a variety of bus architectures. Examples of these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnection (PCI) bus.

[0201] The computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0202] The memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be configured to read and write non-removable, non-volatile magnetic media ( Figure 7 Not shown, usually called a "hard drive"). Although Figure 7 Although not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a floppy disk) and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a Compact Disc Read Only Memory (CD-ROM), a Digital Video Disc Read Only Memory (DVD-ROM), or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of various embodiments of the present disclosure.

[0203] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may include an implementation of a network environment. Program modules 42 generally implement the functions and / or methodologies described in the embodiments of the present disclosure.

[0204] The computer device 12 can also communicate with one or more external devices 14 (e.g., a keyboard, pointing device, display 24, etc.), one or more devices that enable a user to interact with the computer device 12, and / or any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., a network card, a modem, etc.). This communication can occur via an input / output (I / O) interface 22. Furthermore, the computer device 12 can communicate with one or more networks (e.g., a local area network (LAN), a wide area network (WAN), and / or a public network such as the Internet) via a network adapter 20. As shown, the network adapter 20 communicates with the other modules of the computer device 12 via a bus 18. It should be understood that, although not shown, other hardware and / or software modules can be used in conjunction with the computer device 12, including but not limited to microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0205] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing the methods mentioned in the above embodiments.

[0206] According to the technical solutions of the embodiments of the present disclosure, upon receiving a combustion mode switching command, a target mode to be switched to can be determined. Based on the target mode, a first fuel valve and the opening of the first fuel valve corresponding to the target mode can be determined. Based on the opening of the first fuel valve, the first fuel valve can be controlled to switch the combustion mode of the gas turbine. Thus, upon receiving the combustion mode switching command, the target mode to be switched to can be determined. The fuel valve ratios can then be switched based on the openings of the fuel valves in the target mode to switch the combustion mode of the gas turbine, thereby improving the accuracy and efficiency of switching the combustion mode of the gas turbine. Throughout this specification, references to the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" indicate that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without mutual contradiction.

[0207] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the present disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0208] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present disclosure includes additional implementations in which functions may be performed out of the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0209] The logic and / or steps represented in a flowchart or otherwise described herein, for example, can be considered a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" is any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (not exhaustive) of computer-readable media include: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and a portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0210] It should be understood that various parts of the present disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having logic gate circuits for implementing logical functions on data signals, an application-specific integrated circuit having suitable combinational logic gate circuits, a programmable gate array (PGA), a field-programmable gate array (FPGA), etc.

[0211] Those skilled in the art will understand that all or part of the steps in the method of the above embodiment can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiment.

[0212] In addition, the functional units in the various embodiments of the present disclosure may be integrated into a single processing module, or each unit may exist physically separately, or two or more units may be integrated into a single module. The aforementioned integrated modules may be implemented in the form of hardware or in the form of software functional modules. If the integrated modules are implemented in the form of software functional modules and sold or used as independent products, they may also be stored in a computer-readable storage medium.

[0213] The storage medium mentioned above may be a read-only memory, a magnetic disk, or an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. A person of ordinary skill in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A method for switching a combustion mode of a gas turbine, characterized in that: include: Upon receiving a combustion mode switching instruction, determining a target mode to be switched; determining, based on the target mode, a first fuel valve and an opening degree of the first fuel valve corresponding to the target mode; controlling the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine; Determining the target mode to be switched includes: When the gas turbine is not connected to the grid, determining a target mode to be switched based on a rotation speed value of the gas turbine; When the gas turbine is in a grid-connected state, determining a target mode to be switched based on a temperature value or a power value of the gas turbine; After receiving the combustion mode switching instruction, the method further includes: parsing the switching instruction to determine whether it includes a second fuel valve to be put into use and / or a third fuel valve to be closed, wherein the second fuel valve is a new fuel valve to be put into use in the target mode, and the third fuel valve is a fuel valve that is currently put into use and is not included in the target mode; The controlling of the first fuel valve based on the opening of the first fuel valve includes: In response to a situation in which a second fuel valve to be put into use is included, closing the air purge in the first pipeline corresponding to the second fuel valve; Determining that the next process is nitrogen replacement, and performing nitrogen replacement on the first pipeline; When nitrogen replacement is completed, determining whether the first pipeline needs to be pre-filled; In case pre-filling is required, introducing natural gas into the first pipeline based on the filling amount corresponding to the target mode; When pre-filling is completed, the first fuel valve and the second fuel valve are controlled based on the opening degrees of the first fuel valve and the second fuel valve.

2. The method according to claim 1, wherein The controlling of the first fuel valve based on the opening of the first fuel valve includes: In response to not including the second fuel valve to be used, determining whether the first pipeline needs to be pre-filled; In case pre-filling is required, introducing natural gas into the first pipeline based on the filling amount corresponding to the target mode; The first fuel valve is controlled based on the opening degree of the first fuel valve.

3. The method according to claim 1, wherein After nitrogen replacement is performed on the first pipeline, the method further includes: determining whether the first pipeline needs to be pre-filled; When the first pipe does not need to be pre-filled, the first fuel valve is controlled based on the opening degree of the first fuel valve.

4. The method according to claim 1, wherein The controlling of the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine includes: In response to a condition including a third fuel valve to be closed, controlling the third fuel valve to close; When the third fuel valve is in a closed state, nitrogen is replaced in a second pipeline corresponding to the third fuel valve to discharge natural gas in the second pipeline; When the nitrogen replacement in the second pipeline is completed, the second pipeline is purged with air.

5. The method according to claim 1, wherein After controlling the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine, the method further includes: Receiving a confirmation message returned within a preset time period, determining that the combustion mode switching is successful; If no confirmation message is received within the preset time, it is determined that the combustion mode switching has failed, and the target mode is switched again.

6. A gas turbine combustion mode switching device, characterized in that: include: a first determining module, configured to determine a target mode to be switched upon receiving a combustion mode switching instruction; a second determining module, configured to determine, based on the target mode, a first fuel valve and an opening degree of the first fuel valve corresponding to the target mode; a control module, configured to control the first fuel valve based on the opening of the first fuel valve to switch the combustion mode of the gas turbine; Determining the target mode to be switched includes: When the gas turbine is not connected to the grid, determining a target mode to be switched based on a rotation speed value of the gas turbine; When the gas turbine is in a grid-connected state, determining a target mode to be switched based on a temperature value or a power value of the gas turbine; After receiving the combustion mode switching instruction, the method further includes: parsing the switching instruction to determine whether it includes a second fuel valve to be put into use and / or a third fuel valve to be closed, wherein the second fuel valve is a new fuel valve to be put into use in the target mode, and the third fuel valve is a fuel valve that is currently put into use and is not included in the target mode; The controlling of the first fuel valve based on the opening of the first fuel valve includes: In response to a situation in which a second fuel valve to be put into use is included, closing the air purge in the first pipeline corresponding to the second fuel valve; Determining that the next process is nitrogen replacement, and performing nitrogen replacement on the first pipeline; When nitrogen replacement is completed, determining whether the first pipeline needs to be pre-filled; In case pre-filling is required, introducing natural gas into the first pipeline based on the filling amount corresponding to the target mode; When pre-filling is completed, the first fuel valve and the second fuel valve are controlled based on the opening degrees of the first fuel valve and the second fuel valve.

7. A computer device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for switching the combustion mode of a gas turbine as claimed in any one of claims 1 to 5 is implemented.

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