Combustion chamber flameout detection method and device, electronic equipment and storage medium

Abstract

The invention discloses a combustion chamber flameout detection method and device, electronic equipment and a storage medium, and relates to the technical field of gas turbines. The method comprises the steps that the exhaust temperature dispersion degree of a turbine is calculated based on the exhaust temperatures of N temperature sensors arranged on the section of an outlet of the turbine; based on the first exhaust temperature moving average value of each of the N temperature sensors at the first time interval and the second exhaust temperature moving average value of each of the N temperature sensors at the second time interval, calculating the acceleration of each of the N exhaust temperatures; calculating a rotor acceleration of the turbine based on a first rotor speed average value of the turbine at the first time interval and a second rotor speed average value of the turbine at the second time interval; and determining a flameout detection result of the combustion chamber based on the exhaust temperature dispersion degree, the respective accelerations of the N exhaust temperatures and the rotor acceleration, so as to improve the accuracy of flameout detection of the combustion chamber and reduce the cost of flameout detection of the combustion chamber.

Description

Technical Field

[0001] The present application relates to the technical field of gas turbines, and in particular to a method, device, electronic equipment and storage medium for detecting flameout in a combustion chamber. Background Art

[0002] Gas turbines are mainly composed of three parts: compressor, combustion chamber and turbine. The compressor is responsible for sucking in air and compressing it. The compressed air enters the combustion chamber, mixes with the fuel and burns, producing high-temperature and high-pressure gas. These gases then enter the turbine to expand and do work, driving the turbine to rotate, and finally converting energy into mechanical energy or electrical energy. The heat release of fuel combustion in the combustion chamber is a prerequisite for the operation of the gas turbine. If the flame cannot be established during ignition, it is necessary to restart or even shut down for inspection; if the flame is turned off during normal operation, the unburned fuel may enter the turbine and burn, causing deflagration. Therefore, from the perspective of normal and safe operation, it is particularly important to always detect the flame condition in the combustion chamber of the gas turbine.

[0003] At present, one method of detecting flameout in a combustion chamber is based on a flame detector, that is, determining whether a flame exists by detecting the ultraviolet spectrum range in the combustion chamber or measuring the frequency intensity of ultraviolet rays. However, the use of flame detectors for flame detection generally requires multiple flame detectors to work together, and requires regular cleaning and maintenance, and its hardware and maintenance costs are relatively high.

[0004] The other is detection based on the rotor speed change rate, that is, when the gas turbine is running, the presence of flame is determined by comparing the turbine rotor speed change rate with the set threshold; however, flame detection based on the rotor speed change rate is prone to missed reports. For example, during the speed-up process of the gas turbine, if only one or a few burners in the combustion chamber are extinguished, the power generated by the remaining burners may still be sufficient to maintain the acceleration of the gas turbine, making the rotor speed change rate insufficient to trigger the set threshold.

[0005] Therefore, how to improve the accuracy of combustion chamber flameout detection and reduce the cost of combustion chamber flameout detection are issues that need to be urgently addressed. Summary of the invention

[0006] The present application provides a combustion chamber flameout detection method, device, electronic device and storage medium, which are used to improve the accuracy of combustion chamber flameout detection and reduce the cost of combustion chamber flameout detection.

[0007] In a first aspect, a method for detecting flameout in a combustion chamber is provided, comprising:

[0008] Calculating the exhaust temperature dispersion of the turbine based on the exhaust temperatures of each of N temperature sensors disposed on the turbine outlet cross section; wherein N is an integer greater than 2;

[0009] Calculating the acceleration of each of the N exhaust temperatures based on a first exhaust temperature moving average of each of the N temperature sensors in a first time interval and a second exhaust temperature moving average of each of the N temperature sensors in a second time interval; wherein the first time interval is adjacent to the second time interval;

[0010] calculating a rotor acceleration of the turbine based on a first rotor speed average value of the turbine in the first time interval and a second rotor speed average value in the second time interval;

[0011] A misfire detection result of the combustion chamber is determined based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration.

[0012] In an embodiment of the present application, based on the exhaust temperatures of each of the N temperature sensors configured on the turbine, the exhaust temperature dispersion of the turbine is calculated, which can reflect the range of change or degree of difference of the exhaust temperature at different positions; based on the moving average of the first exhaust temperature of each of the N temperature sensors in the first time interval, and the moving average of the second exhaust temperature of each of the N temperature sensors in the second time interval, the acceleration of each of the N exhaust temperatures is calculated, which can reflect how fast the exhaust temperature changes over time during the operation of the turbine; based on the average of the first rotor speed of the turbine in the first time interval, and the average of the second rotor speed in the second time interval, the rotor acceleration of the turbine is calculated, which can reflect how fast the rotor speed of the turbine is during operation; then, based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration, the flameout detection result of the combustion chamber is determined; since it is possible to comprehensively analyze whether the flame in the combustion chamber is extinguished from multiple dimensional features, and there is no need to rely on flame detectors for detection, the accuracy of the combustion chamber flameout detection is improved, and the cost of the combustion chamber flameout detection is reduced.

[0013] In some embodiments, the step of calculating the exhaust temperature dispersion of the turbine based on the exhaust temperatures of N temperature sensors disposed on the turbine outlet section includes:

[0014] Based on the exhaust temperatures of the N temperature sensors disposed on the turbine outlet cross section, M abnormal temperature sensors are determined from the N temperature sensors; wherein M is an integer greater than or equal to 0 and less than or equal to N;

[0015] Replacing the exhaust temperature of each of the M abnormal temperature sensors with the minimum exhaust temperature value among the N exhaust temperatures;

[0016] Based on the exhaust temperature minimum value of each of the M abnormal temperature sensors and the exhaust temperature of each of the NM normal temperature sensors, the exhaust temperature dispersion of the turbine is calculated.

[0017] Through the above method, based on the calculated exhaust temperature dispersion, the difference in exhaust temperature changes during the operation of the turbine can be reflected, providing a corresponding judgment basis for subsequent combustion chamber flameout detection.

[0018] In some embodiments, the calculating the acceleration of each of the N exhaust temperatures based on a first exhaust temperature moving average of each of the N temperature sensors at a first time interval and a second exhaust temperature moving average of each of the N temperature sensors at a second time interval comprises:

[0019] Calculate a moving average of the first exhaust temperature of the first temperature sensor in the first time interval based on the first exhaust temperature of the first temperature sensor at each moment in the first time interval; wherein the first temperature sensor is any one of the N temperature sensors;

[0020] Calculating a moving average of the second exhaust temperature of the first temperature sensor in the second time interval based on the second exhaust temperature of the first temperature sensor at each moment in the second time interval;

[0021] A first acceleration generated by the first temperature sensor is calculated based on the first exhaust temperature moving average value and the second exhaust temperature moving average value.

[0022] Through the above method, based on the calculated acceleration of each exhaust temperature, the change of exhaust temperature over time at different positions of the turbine can be reflected, thereby reflecting the performance of the turbine, whether the turbine working state is normal, and whether the turbine is overheated, and also provides a reference for the subsequent analysis of whether the flame in the combustion chamber is extinguished.

[0023] In some embodiments, calculating the rotor acceleration of the turbine based on a first average rotor speed of the turbine in the first time interval and a second average rotor speed of the turbine in the second time interval includes:

[0024] Calculating an average first rotor speed of the turbine in the first time interval based on the first rotor speed of the turbine at each moment in the first time interval;

[0025] Calculating an average second rotor speed of the turbine in the second time interval based on the second rotor speed of the turbine at each moment in the second time interval;

[0026] A rotor acceleration of the turbine is calculated based on the first rotor speed average value and the second rotor speed average value.

[0027] Through the above method, the rotor acceleration can be used to reflect the performance of the turbine, whether the turbine is working normally, etc., and it also provides another dimension of reference for the subsequent analysis of whether the combustion chamber flame is extinguished.

[0028] In some embodiments, when the turbine is in a speed-up and non-closing stage, determining a flameout detection result of the combustion chamber based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration includes:

[0029] If the exhaust temperature dispersion is greater than a first threshold value and the delay satisfies a first preset delay, determining that the flameout detection result of the combustion chamber is flameout; or

[0030] If the rotor speed of the turbine is greater than or equal to the ignition speed and less than or equal to the second threshold, P of the N accelerations are less than the third threshold, and the delay satisfies the second preset delay, then the flameout detection result of the combustion chamber is determined to be flameout; wherein P is an integer less than or equal to N; or

[0031] If the rotor speed is greater than or equal to the ignition speed and less than or equal to B times the rated rotor speed, the rotor acceleration is less than a fourth threshold, and the delay satisfies a third preset delay, then it is determined that the flameout detection result of the combustion chamber is flameout; wherein B is a set value; or

[0032] If the rotor speed is greater than or equal to the ignition speed and less than or equal to B times the rated rotor speed, the rotor acceleration is less than the fifth threshold, and the delay satisfies the fourth preset delay, then the flameout detection result of the combustion chamber is determined to be flameout; wherein the fifth threshold is less than the fourth threshold, and the fourth preset delay is less than the third preset delay.

[0033] In some embodiments, when the turbine is in the closing and load stage, determining the flameout detection result of the combustion chamber based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration includes:

[0034] If the exhaust temperature dispersion is greater than a sixth threshold value and the time delay satisfies a fifth preset time delay, it is determined that the flameout detection result of the combustion chamber is flameout.

[0035] In a second aspect, a combustion chamber flameout detection device is provided, comprising:

[0036] A first calculation module, configured to calculate the exhaust temperature dispersion of the turbine based on the exhaust temperatures of each of N temperature sensors disposed on the turbine outlet cross section; wherein N is an integer greater than 2;

[0037] A second calculation module, configured to calculate the acceleration of each of the N exhaust temperatures based on a first exhaust temperature moving average of each of the N temperature sensors in a first time interval and a second exhaust temperature moving average of each of the N temperature sensors in a second time interval; wherein the first time interval is adjacent to the second time interval;

[0038] a third calculation module, configured to calculate a rotor acceleration of the turbine based on a first rotor speed average value of the turbine in the first time interval and a second rotor speed average value in the second time interval;

[0039] The detection module is used to determine a flameout detection result of the combustion chamber based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration.

[0040] In some embodiments, the first computing module is specifically configured to:

[0041] Based on the exhaust temperatures of the N temperature sensors disposed on the turbine outlet cross section, M abnormal temperature sensors are determined from the N temperature sensors; wherein M is an integer greater than or equal to 0 and less than or equal to N;

[0042] Replacing the exhaust temperature of each of the M abnormal temperature sensors with the minimum exhaust temperature value among the N exhaust temperatures;

[0043] Based on the exhaust temperature minimum value of each of the M abnormal temperature sensors and the exhaust temperature of each of the NM normal temperature sensors, the exhaust temperature dispersion of the turbine is calculated.

[0044] According to a third aspect, an electronic device is provided, including:

[0045] A memory for storing a computer program; a processor for implementing any one of the method steps in the first aspect when executing the computer program stored in the memory.

[0046] According to a fourth aspect, a computer-readable storage medium is provided, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method steps described in any one of the first aspects are implemented.

[0047] For each aspect from the second to the fourth aspect and the technical effects that may be achieved by each aspect, please refer to the above description of the technical effects that can be achieved by the first aspect or various possible schemes in the first aspect, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A schematic diagram of an application scenario applicable to the embodiments of the present application;

[0049] Figure 2 A flow chart of a combustion chamber flameout detection method provided in an embodiment of the present application;

[0050] Figure 3 A flow chart for determining exhaust temperature dispersion of a turbine provided in an embodiment of the present application;

[0051] Figure 4 A schematic diagram of the structure of a combustion chamber flameout detection device provided in an embodiment of the present application;

[0052] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiment of the present application will be clearly and completely described below in conjunction with the drawings in the embodiment of the present application. Obviously, the described embodiment is only a part of the embodiment of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be arbitrarily combined with each other. In addition, although the logical order is shown in the flow chart, in some cases, the steps shown or described can be performed in an order different from that here.

[0054] The terms "first" and "second" in the specification and claims of the present application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the term "comprising" and any of their variations are intended to cover non-exclusive protection. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices. "Multiple" in the present application can mean at least two, for example, two, three or more, and the embodiments of the present application are not limited.

[0055] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description. It should be noted that in the embodiments of the present application, certain software, components, models and other existing solutions in the industry may be mentioned, which should be considered as exemplary, and their purpose is only to illustrate the feasibility of the implementation of the technical solution of the present application, but it does not mean that the applicant has or will necessarily use the solution.

[0056] The following is a brief introduction to the application scenarios to which the technical solutions of the embodiments of the present application can be applied. It should be noted that the application scenarios introduced below are only used to illustrate the embodiments of the present application and are not limited. In specific implementation, the technical solutions provided by the embodiments of the present application can be flexibly applied according to actual needs.

[0057] Figure 1 This is a schematic diagram of an application scenario applicable to the embodiment of the present application. As shown in the figure, the application scenario mainly includes: a compressor 100, a combustion chamber 101, and a turbine 102; wherein the air outlet of the compressor 100 is connected to the air inlet of the combustion chamber through an air pipe, the air outlet of the combustion chamber 101 is connected to the air inlet of the turbine 102, and the compressor 100 and the turbine 102 are connected through a transmission shaft. Each device will be introduced one by one below.

[0058] The compressor 100 includes an air inlet. After air enters the air inlet, the compressor 100 rotates at high speed to compress the air into high-pressure air, and then transmits the high-pressure air to the combustion chamber 101 through an air pipe. It should be noted that the compressor 100 can be an axial compressor or a centrifugal compressor. The structural type of the compressor is not limited in the embodiments of the present application.

[0059] The combustion chamber 101 may be equipped with a plurality of gas burners, which may be used to mix the high-pressure air from the air pipe with fuel (e.g., natural gas or gasoline, etc.) for combustion to generate high-temperature and high-pressure air. It should be noted that the combustion chamber 101 may be a cylindrical combustion chamber or a branched combustion chamber, an annular combustion chamber, or an annular combustion chamber. The embodiment of the present application does not limit the structural type of the combustion chamber.

[0060] The turbine 102 performs work by rotating the high-temperature and high-pressure air from the combustion chamber 101. A portion of the gas after the turbine performs work is used to drive the compressor 100 to rotate at high speed to perform work, and the excess portion is output from the exhaust port as the effective work of the gas turbine, converting the chemical energy of the fuel into mechanical work or electrical energy.

[0061] To further illustrate the technical solution provided by the embodiment of the present application, this is described in detail below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiment of the present application provides the method operation steps as shown in the following embodiments or drawings, more or fewer operation steps may be included in the method based on routine or no creative labor. In the steps where there is no necessary causal relationship logically, the execution order of these steps is not limited to the execution order provided by the embodiment of the present application. The method may be executed or executed in parallel in the actual processing process or when the device is executed in accordance with the method sequence shown in the embodiment or drawings.

[0062] Figure 2 A flow chart of a combustion chamber flameout detection method provided in an embodiment of the present application, which can be executed by a combustion chamber flameout detection device to improve the accuracy of combustion chamber flameout detection and reduce the cost of combustion chamber flameout detection. Figure 2 As shown, the process includes the following steps:

[0063] 201: Calculate the exhaust temperature dispersion of the turbine based on the exhaust temperatures of the N temperature sensors arranged on the turbine outlet cross section.

[0064] In this step, the turbine may refer to Figure 1 In the turbine 102 shown, N temperature sensors are arranged on the exhaust cross-section side of the turbine, and the N temperature sensors are located at different positions of the cross-section. It should be noted that the temperature sensor may refer to a thermocouple or other optical pyrometer, and the specific value of N may be reasonably configured according to actual needs, and the embodiment of the present application does not limit this.

[0065] In some embodiments, the exhaust temperature dispersion of the turbine can be calculated by referring to Figure 3 As shown, a flow chart for determining the exhaust temperature dispersion of a turbine provided by an embodiment of the present application is exemplarily shown. The flow chart may include the following steps:

[0066] 301: Based on the exhaust temperatures of the N temperature sensors disposed on the turbine outlet section, M abnormal temperature sensors are determined from the N temperature sensors.

[0067] In this step, M is an integer greater than or equal to 0 and less than or equal to N.

[0068] In some embodiments, based on the exhaust temperatures of the N temperature sensors configured on the turbine outlet section, M abnormal temperature sensors are determined from the N temperature sensors, which can be: comparing the exhaust temperatures of the N temperature sensors with a set temperature range (e.g., 0-1000°C); if the exhaust temperature of the first temperature sensor among the N temperature sensors is not within the temperature range, the first temperature sensor is determined to be an abnormal temperature sensor. Similarly, the remaining temperature sensors among the N temperature sensors are also judged according to the above logic, and the embodiments of the present application will not be described again here.

[0069] 302: Replace the exhaust temperature of each of the M abnormal temperature sensors with the minimum exhaust temperature value among the N exhaust temperatures.

[0070] For example, assuming that there are a total of 4 temperature sensors, and it is determined in 301 that there are 2 abnormal temperature sensors among the 4 temperature sensors; at this time, the exhaust temperature of each of the 2 abnormal temperature sensors can be replaced with the minimum exhaust temperature among the 4 exhaust temperatures. For example, the second temperature sensor among the 4 temperature sensors is an abnormal temperature sensor, and after comparing the exhaust temperatures of all temperature sensors, the exhaust temperature corresponding to the third temperature sensor is the minimum, then the exhaust temperature corresponding to the second temperature sensor is replaced with the exhaust temperature corresponding to the third temperature sensor.

[0071] 303: Calculate the exhaust temperature dispersion of the turbine based on the respective minimum exhaust temperature values ​​of the M abnormal temperature sensors and the respective exhaust temperatures of the NM normal temperature sensors.

[0072] In some embodiments, when NM is greater than or equal to 2, the exhaust temperature dispersion of the turbine is calculated based on the exhaust temperature minimum values ​​of each of the M abnormal temperature sensors and the exhaust temperature of each of the NM normal temperature sensors. The method may be as follows: based on the exhaust temperature minimum values ​​of each of the M abnormal temperature sensors and the exhaust temperature of each of the NM normal temperature sensors, they are sorted from large to small. After the sorting is completed, the exhaust temperature just below the maximum value and the exhaust temperature of the minimum value are calculated to obtain the exhaust temperature dispersion of the turbine. For example, assuming that there are 4 temperature sensors, the corresponding exhaust temperatures are N1, N2, N3, and N4 respectively; first, based on the respective exhaust temperatures, they are sorted from large to small to obtain N1, N2, N3, and N4; then the exhaust temperature dispersion is calculated as N2-N4, thereby reflecting the range of changes or differences in exhaust temperature at different locations and times during the operation of the turbine, so as to facilitate the subsequent evaluation of the flame conditions in the combustion chamber based on this.

[0073] In other embodiments, when NM is less than 2, the exhaust temperature dispersion is directly output as 0, indicating that there is an obvious fault in the gas turbine at this time, and an abnormal prompt message can be output to facilitate the user to take timely remedial measures.

[0074] In other embodiments, the sorting method may be a bubble sort method, a shell sort method, a heap sort method, or an insertion sort method, which is not limited in the embodiments of the present application.

[0075] 202 : Calculate accelerations of N exhaust temperatures based on first exhaust temperature moving averages of the N temperature sensors in the first time interval and second exhaust temperature moving averages of the N temperature sensors in the second time interval.

[0076] In the embodiment of the present application, taking any first temperature sensor among the N temperature sensors as an example, the acceleration generated by the first temperature sensor is calculated, specifically, it can be:

[0077] First, based on the first exhaust gas temperature of the first temperature sensor at each time point (for example, every 1 second) within the first time interval, a moving average value of the first exhaust gas temperature of the first temperature sensor in the first time interval is calculated.

[0078] In some embodiments, the time interval (Ts) can be flexibly set, for example, Ts=10*T0; wherein T0 is a set control period.

[0079] In some embodiments, the first exhaust temperature moving average value may satisfy the following expression:

[0080]

[0081] Among them, nm represents the number of first exhaust temperatures contained in the first time interval, and V[m+1]+V[m+2]+…+V[n] represents the first exhaust temperatures corresponding to different times in the first time interval.

[0082] Secondly, based on the second exhaust temperature of the first temperature sensor at each moment in the second time interval, a moving average value of the second exhaust temperature of the first temperature sensor in the second time interval is calculated;

[0083] In some embodiments, the second exhaust temperature moving average value may satisfy the following expression:

[0084]

[0085] Wherein, nm represents the number of second exhaust temperatures contained in the second time interval, and V[m]+V[m+1]+…+V[n-1] represents the second exhaust temperatures corresponding to different moments in the second time interval.

[0086] Then, a first acceleration generated by the first temperature sensor is calculated based on the first exhaust temperature moving average value and the second exhaust temperature moving average value.

[0087] In some embodiments, the first acceleration may satisfy the following expression:

[0088]

[0089] Similarly, the accelerations generated by other temperature sensors are also calculated in the above manner, which will not be described again here.

[0090] In this step, by calculating the acceleration of each of the N exhaust temperatures, the change of the exhaust temperature at different positions of the turbine over time can be reflected, thereby reflecting the performance of the turbine, whether the turbine is working normally, and whether the turbine is overheated, and also provides a reference for the subsequent analysis of whether the flame in the combustion chamber is extinguished.

[0091] 203 : Calculate the rotor acceleration of the turbine based on a first rotor speed average value of the turbine in a first time interval and a second rotor speed average value in a second time interval.

[0092] In some embodiments, calculating the rotor acceleration of the turbine may be as follows: based on the first rotor speed of the turbine at each moment in the first time interval, calculating an average first rotor speed of the turbine in the first time interval; based on the second rotor speed of the turbine at each moment in the second time interval, calculating an average second rotor speed of the turbine in the second time interval; and calculating the rotor acceleration of the turbine based on the average first rotor speed and the average second rotor speed. This allows the rotor acceleration to reflect turbine performance, whether the turbine is operating normally, etc., and also provides another dimension of reference for subsequent analysis of whether the combustion chamber flame is extinguished.

[0093] 204: Determine the flameout detection result of the combustion chamber based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration.

[0094] In some embodiments, based on the above-mentioned exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration, the flameout detection result of the combustion chamber is determined, which may include at least the following situations:

[0095] Case 1: When the turbine is in the speed-up and non-closing stage (which means the stage during the turbine startup process when the turbine speed gradually increases but has not yet been closed to the grid or load (i.e., has not yet started to output electricity)), if the exhaust temperature dispersion is greater than a first threshold value (e.g., 35C°), and the delay meets a first preset delay (e.g., 20 seconds (S)), then the flameout detection result of the combustion chamber is determined to be flameout.

[0096] Case 2: When the turbine is in the speed-up and non-closing stage, if the rotor speed of the turbine is greater than or equal to the ignition speed and less than or equal to the second threshold (for example, 0.4 rpm), P of the N accelerations are less than the third threshold (for example, -2°C / s), and the delay meets the second preset delay (for example, 1S), then the flameout detection result of the combustion chamber is determined to be flameout; wherein P is an integer less than or equal to N.

[0097] Case 3: When the turbine is in the speed-up and non-closing stage, if the rotor speed is greater than or equal to the ignition speed and less than or equal to B times the rated rotor speed, the rotor acceleration is less than the fourth threshold (for example, -0.01rpm / s), and the delay meets the third preset delay (for example, 300ms), then the flameout detection result of the combustion chamber is determined to be flameout; where B is the set value (for example, 1.1 times).

[0098] Case 4: When the turbine is in the speed-up and non-closing stage, if the rotor speed is greater than or equal to the ignition speed and less than or equal to B times the rated rotor speed, the rotor acceleration is less than the fifth threshold (for example, -0.02rpm / s), and the delay meets the fourth preset delay (for example, 100ms), then the flameout detection result of the combustion chamber is determined to be flameout; wherein, the fifth threshold is less than the fourth threshold, and the fourth preset delay is less than the third preset delay.

[0099] Case 5: When the turbine is in the closing and load stage (which means the stage in which the turbine is connected to the grid and starts to bear the load during operation), if the exhaust temperature dispersion is greater than the sixth threshold value (for example, 30C°) and the time delay satisfies the fifth preset time delay, the flameout detection result of the combustion chamber is determined to be flameout.

[0100] In this step, through the constraints of situations 1 to 5 listed above, as long as at least one of the above situations is met, it can be determined (evaluated) whether there is flameout in the combustion chamber, and the flameout situation of the combustion chamber can be detected from multiple dimensions of characteristics such as the exhaust temperature dispersion of the turbine, the acceleration of the exhaust temperature, and the rotor acceleration, so that the flameout detection result is more reliable.

[0101] In other embodiments, when it is determined that the flameout detection result of the combustion chamber is flameout, corresponding prompt information can be generated for the above different situations, so that the user can take timely measures to remedy the situation. It should be noted that the above-mentioned several situations are examples, and different constraints can be set according to actual scenarios and at different operating stages of the turbine to determine the flameout of the combustion chamber to ensure real-time monitoring of the flameout of the combustion chamber, and the embodiments of the present application are not limited here.

[0102] It should be noted that the above steps 201, 202, and 203 are not limited in sequence and may be executed simultaneously or at different times, and the implementation of this application is not limited thereto.

[0103] In an embodiment of the present application, based on the exhaust temperatures of each of the N temperature sensors configured on the turbine outlet cross-section, the exhaust temperature dispersion of the turbine is calculated, which can reflect the range of change or degree of difference of the exhaust temperature at different positions; based on the moving average of the first exhaust temperature of each of the N temperature sensors in the first time interval, and the moving average of the second exhaust temperature of each of the N temperature sensors in the second time interval, the acceleration of each of the N exhaust temperatures is calculated, which can reflect how fast the exhaust temperature changes with time during the operation of the turbine; based on the average of the first rotor speed of the turbine in the first time interval, and the average of the second rotor speed in the second time interval, the rotor acceleration of the turbine is calculated, which can reflect how fast the rotor speed is during the operation of the turbine; then, based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration, the flameout detection result of the combustion chamber is determined; since it is possible to comprehensively analyze whether the flame in the combustion chamber is extinguished from multiple dimensional features, and there is no need to rely on flame detectors for detection, the accuracy of the combustion chamber flameout detection is improved, and the cost of the combustion chamber flameout detection is reduced.

[0104] Based on the same technical concept, a combustion chamber flameout detection device is also provided in an embodiment of the present application, and the device can implement the above-mentioned combustion chamber flameout detection method process in the embodiment of the present application.

[0105] Figure 4 A schematic diagram of the structure of a combustion chamber flameout detection device provided in an embodiment of the present application. The device includes a first calculation module 401, a second calculation module 402, a third calculation module 403, and a detection module 404.

[0106] The first calculation module 401 is used to calculate the exhaust temperature dispersion of the turbine based on the exhaust temperatures of each of N temperature sensors configured on the turbine outlet section; wherein N is an integer greater than 2.

[0107] The second calculation module 402 is used to calculate the acceleration of each of the N exhaust temperatures based on the first exhaust temperature moving average of each of the N temperature sensors in a first time interval and the second exhaust temperature moving average of each of the N temperature sensors in a second time interval; wherein the first time interval is adjacent to the second time interval.

[0108] The third calculation module 403 is used to calculate the rotor acceleration of the turbine based on the first rotor speed average value of the turbine in the first time interval and the second rotor speed average value in the second time interval.

[0109] The detection module 404 is used to determine a flameout detection result of the combustion chamber based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration.

[0110] In some embodiments, the first calculation module 401 is specifically used to:

[0111] Based on the exhaust temperatures of the N temperature sensors disposed on the turbine, M abnormal temperature sensors are determined from the N temperature sensors; wherein M is an integer greater than or equal to 0 and less than or equal to N;

[0112] Replacing the exhaust temperature of each of the M abnormal temperature sensors with the minimum exhaust temperature value among the N exhaust temperatures;

[0113] Based on the exhaust temperature minimum value of each of the M abnormal temperature sensors and the exhaust temperature of each of the NM normal temperature sensors, the exhaust temperature dispersion of the turbine is calculated.

[0114] In some embodiments, the second calculation module 402 is specifically used to:

[0115] Calculate a moving average of the first exhaust temperature of the first temperature sensor in the first time interval based on the first exhaust temperature of the first temperature sensor at each moment in the first time interval; wherein the first temperature sensor is any one of the N temperature sensors;

[0116] Calculating a moving average of the second exhaust temperature of the first temperature sensor in the second time interval based on the second exhaust temperature of the first temperature sensor at each moment in the second time interval;

[0117] A first acceleration generated by the first temperature sensor is calculated based on the first exhaust temperature moving average value and the second exhaust temperature moving average value.

[0118] In some embodiments, the third calculation module 402 is specifically used to:

[0119] Calculating an average first rotor speed of the turbine in the first time interval based on the first rotor speed of the turbine at each moment in the first time interval;

[0120] Calculating an average second rotor speed of the turbine in the second time interval based on the second rotor speed of the turbine at each moment in the second time interval;

[0121] A rotor acceleration of the turbine is calculated based on the first rotor speed average value and the second rotor speed average value.

[0122] It should be noted here that the above-mentioned device provided in the embodiment of the present application can implement all the method steps in the above-mentioned method embodiment and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0123] Based on the same technical concept, an electronic device is also provided in an embodiment of the present application, and the electronic device can realize the functions of the aforementioned combustion chamber flameout detection device.

[0124] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0125] At least one processor 501, and a memory 502 connected to the at least one processor 501. The specific connection medium between the processor 501 and the memory 502 is not limited in the embodiment of the present application. Figure 5 In the example, the processor 501 and the memory 502 are connected via a bus 500. The bus 500 is Figure 5 The connections between other components are shown in bold lines, and are not intended to be limiting. The bus 500 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 Only one thick line is used in the figure, but it does not mean that there is only one bus or one type of bus. Alternatively, the processor 501 can also be called a controller, and there is no limitation on the name.

[0126] In the embodiment of the present application, the memory 502 stores instructions that can be executed by at least one processor 501. The at least one processor 501 can execute a combustion chamber flameout detection method discussed above by executing the instructions stored in the memory 502. The processor 501 can implement Figure 4 The functions of each module in the device shown.

[0127] Among them, the processor 501 is the control center of the device, and can use various interfaces and lines to connect the various parts of the entire control device. By running or executing instructions stored in the memory 502 and calling data stored in the memory 502, the various functions of the device and processing data, the device can be monitored as a whole.

[0128] In the embodiment of the present application, the processor 501 may include one or more processing units, and the processor 501 may integrate an application processor and a modem processor, wherein the application processor mainly processes an operating system, a user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the modem processor may not be integrated into the processor 501. In some embodiments, the processor 501 and the memory 502 may be implemented on the same chip, and in some embodiments, they may also be implemented separately on separate chips.

[0129] The processor 501 may be a general-purpose processor, such as a central processing unit (CPU), a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of the present application. A general-purpose processor may be a microprocessor or any conventional processor, etc. The steps of a combustion chamber flameout detection method disclosed in the embodiments of the present application may be directly embodied as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0130] The memory 502 is a non-volatile computer-readable storage medium that can be used to store non-volatile software programs, non-volatile computer executable programs and modules. The memory 502 may include at least one type of storage medium, such as a flash memory, a hard disk, a multimedia card, a card-type memory, a random access memory (Random Access Memory, RAM), a static random access memory (Static Random Access Memory, SRAM), a programmable read-only memory (Programmable Read Only Memory, PROM), a read-only memory (Read Only Memory, ROM), an electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), a magnetic memory, a disk, an optical disk, etc. The memory 502 is any other medium that can be used to carry or store a desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited thereto. The memory 502 in the embodiment of the present application can also be a circuit or any other device that can realize a storage function, for storing program instructions and / or data.

[0131] By programming the processor 501, the code corresponding to the combustion chamber flameout detection method described in the above embodiment can be fixed into the chip, so that the chip can execute the code when running. Figure 2The embodiment shown is a method for detecting flameout in a combustion chamber. How to design and program the processor 501 is a technique known to those skilled in the art and will not be described in detail here.

[0132] It should be noted here that the above-mentioned electronic device provided in the embodiment of the present application can implement all the method steps implemented in the above-mentioned method embodiment, and can achieve the same technical effect. The parts and beneficial effects of this embodiment that are the same as the method embodiment will not be described in detail here.

[0133] Based on the same technical concept, an embodiment of the present application provides a computer storage medium, the computer storage medium includes: a computer program code, when the computer program code is executed on a computer, the computer executes any one of the methods for detecting a flameout in a combustion chamber as discussed above. Since the principle of solving the problem by the above computer storage medium is similar to that of the method for detecting a flameout in a combustion chamber, the implementation of the above computer storage medium can refer to the implementation of the method, and the repeated parts will not be repeated.

[0134] In the specific implementation process, the computer storage medium may include: Universal Serial Bus Flash Drive (USB), mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and other storage media that can store program codes.

[0135] Based on the same technical concept, the embodiment of the present application also provides a computer program product, which includes: computer program code, when the computer program code is run on a computer, the computer executes any one of the methods for detecting flameout in a combustion chamber as discussed above. Since the principle of solving the problem by the above computer program product is similar to that of the method for detecting flameout in a combustion chamber, the implementation of the above computer program product can refer to the implementation of the method, and the repeated parts will not be repeated.

[0136] The computer program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more conductors, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0137] The method in the present application can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instruction is loaded and executed on a computer, the process or function described in the present application is executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, a core network device, an OAM or other programmable device.

[0138] The computer program or instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be transmitted from one website, computer, server or data center to another website, computer, server or data center by wired or wireless means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; it may also be a semiconductor medium, such as a solid-state drive. The computer-readable storage medium may be a volatile or non-volatile storage medium, or may include both volatile and non-volatile types of storage media.

[0139] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0140] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device, which implements the instructions in the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0141] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0142] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for detecting flameout in a combustion chamber, characterized in that: include: Calculating the exhaust temperature dispersion of the turbine based on the exhaust temperatures of each of N temperature sensors disposed on the turbine outlet cross section; wherein N is an integer greater than 2; Calculating the acceleration of each of the N exhaust temperatures based on a first exhaust temperature moving average of each of the N temperature sensors in a first time interval and a second exhaust temperature moving average of each of the N temperature sensors in a second time interval; wherein the first time interval is adjacent to the second time interval; calculating a rotor acceleration of the turbine based on a first rotor speed average value of the turbine in the first time interval and a second rotor speed average value in the second time interval; A misfire detection result of the combustion chamber is determined based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration.

2. The method according to claim 1, characterized in that The calculating of the exhaust temperature dispersion of the turbine based on the exhaust temperatures of the N temperature sensors disposed on the turbine outlet cross section includes: Based on the exhaust temperatures of the N temperature sensors disposed on the turbine outlet cross section, M abnormal temperature sensors are determined from the N temperature sensors; wherein M is an integer greater than or equal to 0 and less than or equal to N; Replacing the exhaust temperature of each of the M abnormal temperature sensors with the minimum exhaust temperature value among the N exhaust temperatures; Based on the exhaust temperature minimum value of each of the M abnormal temperature sensors and the exhaust temperature of each of the NM normal temperature sensors, the exhaust temperature dispersion of the turbine is calculated.

3. The method according to claim 1, characterized in that The calculating the acceleration of each of the N exhaust temperatures based on the first exhaust temperature moving average of each of the N temperature sensors at the first time interval and the second exhaust temperature moving average of each of the N temperature sensors at the second time interval comprises: Calculate a moving average of the first exhaust temperature of the first temperature sensor in the first time interval based on the first exhaust temperature of the first temperature sensor at each moment in the first time interval; wherein the first temperature sensor is any one of the N temperature sensors; Calculating a moving average of the second exhaust temperature of the first temperature sensor in the second time interval based on the second exhaust temperature of the first temperature sensor at each moment in the second time interval; A first acceleration generated by the first temperature sensor is calculated based on the first exhaust temperature moving average value and the second exhaust temperature moving average value.

4. The method according to claim 1, characterized in that The calculating the rotor acceleration of the turbine based on a first rotor speed average value of the turbine in the first time interval and a second rotor speed average value in the second time interval comprises: Calculating an average first rotor speed of the turbine in the first time interval based on the first rotor speed of the turbine at each moment in the first time interval; Calculating an average second rotor speed of the turbine in the second time interval based on the second rotor speed of the turbine at each moment in the second time interval; A rotor acceleration of the turbine is calculated based on the first rotor speed average value and the second rotor speed average value.

5. The method according to any one of claims 1 to 4, characterized in that: When the turbine is in a speed-up and non-closing stage, determining a flameout detection result of the combustion chamber based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration includes: If the exhaust temperature dispersion is greater than a first threshold value and the delay satisfies a first preset delay, determining that the flameout detection result of the combustion chamber is flameout; or If the rotor speed of the turbine is greater than or equal to the ignition speed and less than or equal to the second threshold, P of the N accelerations are less than the third threshold, and the delay satisfies the second preset delay, then the flameout detection result of the combustion chamber is determined to be flameout; wherein P is an integer less than or equal to N; or If the rotor speed is greater than or equal to the ignition speed and less than or equal to B times the rated rotor speed, the rotor acceleration is less than a fourth threshold, and the delay satisfies a third preset delay, then it is determined that the flameout detection result of the combustion chamber is flameout; wherein B is a set value; or If the rotor speed is greater than or equal to the ignition speed and less than or equal to B times the rated rotor speed, the rotor acceleration is less than the fifth threshold, and the delay satisfies the fourth preset delay, then the flameout detection result of the combustion chamber is determined to be flameout; wherein the fifth threshold is less than the fourth threshold, and the fourth preset delay is less than the third preset delay.

6. The method according to any one of claims 1 to 4, characterized in that: When the turbine is in the closing and loading stage, the flameout detection result of the combustion chamber is determined based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration, including: If the exhaust temperature dispersion is greater than a sixth threshold value and the time delay satisfies a fifth preset time delay, it is determined that the flameout detection result of the combustion chamber is flameout.

7. A combustion chamber flameout detection device, characterized in that: include: A first calculation module, configured to calculate the exhaust temperature dispersion of the turbine based on the exhaust temperatures of each of N temperature sensors disposed on the turbine outlet cross section; wherein N is an integer greater than 2; A second calculation module, configured to calculate the acceleration of each of the N exhaust temperatures based on a first exhaust temperature moving average of each of the N temperature sensors in a first time interval and a second exhaust temperature moving average of each of the N temperature sensors in a second time interval; wherein the first time interval is adjacent to the second time interval; a third calculation module, configured to calculate a rotor acceleration of the turbine based on a first rotor speed average value of the turbine in the first time interval and a second rotor speed average value in the second time interval; The detection module is used to determine a flameout detection result of the combustion chamber based on the exhaust temperature dispersion, the acceleration of each of the N exhaust temperatures, and the rotor acceleration.

8. The device according to claim 7, characterized in that The first calculation module is specifically used for: Based on the exhaust temperatures of the N temperature sensors disposed on the turbine outlet cross section, M abnormal temperature sensors are determined from the N temperature sensors; wherein M is an integer greater than or equal to 0 and less than or equal to N; Replacing the exhaust temperature of each of the M abnormal temperature sensors with the minimum exhaust temperature value among the N exhaust temperatures; Based on the exhaust temperature minimum value of each of the M abnormal temperature sensors and the exhaust temperature of each of the NM normal temperature sensors, the exhaust temperature dispersion of the turbine is calculated.

9. An electronic device, characterized in that: include: Memory, used to store computer programs; A processor, configured to implement the method according to any one of claims 1 to 6 when executing a computer program stored in the memory.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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