JP2005069088A - Combustion monitoring system and combustion monitoring method of gas turbine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustion monitoring system and a combustion monitoring method of a gas turbine, surely detecting which combuster causes abnormality. <P>SOLUTION: A combustion monitoring system provided on the gas turbine includes: combusters; a turbine blade rotated by combustion gas supplied from each combustor; an exhaust part in which combustion gas after working on the turbine blade is introduced; and a thermocouple provided on the exhaust part to measure the temperature of combustion gas. The system further includes: a database 1 storing the temperature of combustion gas detected by the thermocouple every one minute in association with the output of the gas turbine; and an operation part for classifying the temperature of combustion gas stored in the database over 24 hours by every IMW, calculating the maximum value and the minimum value in every output range, and comparing the maximum value and the minimum value with supervising data to determine that abnormality occurs in the combustor when the difference is a predetermined value or more. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a monitoring system and a monitoring method for monitoring a combustion state of a gas turbine.

  FIG. 13 is an example of a gas turbine conventionally installed in a power plant. As shown in the figure, the gas turbine includes a compression unit 51, a turbine unit 53, and an exhaust unit 55. The compression unit 51 is for compressing air and sending it to the turbine unit 53. The turbine part 53 is formed in a cylindrical shape, and a turbine blade 531 connected to a generator (not shown) is rotatably provided therein. In addition, a plurality of combustors 532 that generate high-temperature and high-pressure combustion gases are annularly arranged on the outer peripheral edge of the turbine portion 53. The air compressed by the compression unit 51 is introduced into the combustor 532 and mixed with a fuel such as natural gas, and the combustion gas is introduced from each combustor 532 into the turbine blade 531. The turbine blades 531 are rotated by the combustion gas, and power is generated in the generator. The combustion gas after working by rotating the turbine blade 531 is sent to the exhaust section 55.

By the way, since the combustor 531 of the gas turbine as described above operates under high temperature and high pressure, an operation with more sufficient monitoring is required. As one of such monitoring methods, a method of detecting the abnormality of the combustor 531 by measuring the temperature of the combustion gas is employed. More specifically, a plurality of thermocouples 551 are annularly arranged in the exhaust portion 55 so as to face the combustor 531 and the instantaneous fuel gas temperature detected by each thermocouple 551 is compared with a reference value. . And when the difference became more than predetermined value, it was judged that abnormality occurred in the combustor 532. In addition, examples of conventional combustion monitoring systems for gas turbines include those disclosed in Patent Document 1 and Patent Document 2.
JP-A-6-123239 Japanese Patent Laid-Open No. 10-231739

  However, since the temperature of the fuel gas varies greatly, it has been difficult to grasp the tendency of a subtle temperature change only by comparing the instantaneous temperature at each measurement point with a reference value as in the prior art. Therefore, even if an abnormality has occurred in the combustor 532, the abnormality cannot be grasped until a large temperature change due to an accident such as misfire is detected, and the combustor 532 can be sufficiently monitored. I could not say.

  There are also the following problems. The fuel gas after the work swirls under the influence of the rotation of the turbine blades, and then is sent to the exhaust section 55, where the temperature is detected by the thermocouple 551. In other words, the combustor 532 in which an abnormality has occurred is present at a shifted position rather than a position facing the thermocouple 551 that has detected an abnormal temperature change. Therefore, in order to identify the combustor 532 in which an abnormality has occurred, it is necessary to consider the swirl characteristics, but even if this is taken into account, the method for monitoring the instantaneous temperature as described above is a combustion in which an abnormality has occurred. It was not easy to accurately identify the vessel 532.

  Accordingly, the present invention has been made to solve the above problems, and provides a combustion monitoring system and combustion monitoring method for a gas turbine that can reliably detect that an abnormality has occurred in any of the combustors. This is the first purpose. It is a second object of the present invention to provide a combustion monitoring system and combustion monitoring method for a gas turbine that can accurately identify a combustor in which an abnormality has occurred when an abnormality occurs in any of the combustors.

  According to a first aspect of the present invention, there is provided a combustor, a turbine blade that is rotated by combustion gas supplied from the combustor, an exhaust portion into which combustion gas after working on the turbine blade is introduced, and the exhaust A combustion monitoring system provided in a gas turbine having a measuring means for measuring the temperature of the combustion gas provided in a section, which is made in order to achieve the first object, at a predetermined time interval. Storage means for storing the temperature of the combustion gas detected by the measurement means in association with the output of the gas turbine at that time, and the temperature of the combustion gas stored in the storage means for a predetermined period of time And calculating the maximum value and the minimum value for each output range, comparing the maximum value and the minimum value with the teacher data, and if the difference is equal to or greater than a predetermined value, the combustion vessel Abnormality and a and determining operation means has occurred.

  According to this configuration, the temperature of the combustion gas measured within a predetermined period is averaged for each output of the gas turbine, and the maximum value and the minimum value of the average value are compared with the teacher data. In this way, since the average value of the temperature change of the combustion gas is used, the subtle temperature change of the combustion gas is compared with the case where the instantaneously measured temperature and the reference value are directly compared as in the conventional example. It becomes possible to grasp. Therefore, it is possible to detect an abnormality before the combustor fails and the flame misfires, and a maintenance plan can be made in advance. As a result, the combustor can be effectively maintained.

  As used herein, the “output of the gas turbine” may be, for example, the output of a generator connected to the gas turbine, but if it is equivalent to this, the output of the gas turbine Can be used. For example, a fuel command value for the gas turbine can be used.

  The above example is intended for a single can type gas turbine provided with only one combustor, for example, used in a cogeneration system or the like, but in a gas turbine provided with a plurality of combustors, Such a system can be proposed.

  That is, according to the second aspect of the present invention, a plurality of combustors arranged in an annular shape, a turbine blade rotating by combustion gas supplied from the combustor, and a combustion gas after working on the turbine blade are provided. A combustion monitoring system provided in a gas turbine comprising an exhaust section to be introduced and a plurality of measuring means arranged in an annular shape in the exhaust section so as to face the plurality of combustors and measuring the temperature of the combustion gas In order to achieve the second object, a memory for storing the temperature of the combustion gas detected by the measuring means at predetermined time intervals in association with the output of the gas turbine at that time. And the temperature of the combustion gas stored in the storage unit over a predetermined period is classified for each predetermined output range to obtain a maximum value and a minimum value for each measuring unit, and an average of these maximum values and minimum values And calculating means for comparing the average value with the teacher data and determining that an abnormality has occurred in any one of the combustors when the difference is equal to or greater than a predetermined value. When it is determined that an abnormality has occurred in the combustor, the calculation means specifies the measurement means that has detected the maximum value or minimum value of the temperature of the combustion gas in the measured output, and then For each output range, the specified measurement means determines a weight value according to the probability that the maximum or minimum value of the combustion gas temperature is detected, and corresponds to the circumference where the plurality of measurement means are arranged. And defining a calculation line in which the position of each measuring means is specified, deriving a turning angle corresponding to the output range based on a predetermined turning characteristic, and for each output range, the position of the specified measuring means The turning angle is opposite to the turning direction from The combustor corresponding to the position where the sum of the weight values is the highest is obtained by attaching the weight value to the specific position on the returned computation line, and further overlapping the computation lines for each output range to which the weight value is attached. It is determined that an abnormality has occurred.

  According to this configuration, first, the temperature of the combustion gas detected within a predetermined period is classified for each measurement means for each predetermined output range of the gas turbine, and the average value of the temperature of the combustion gas for each output range Then, the maximum value and the minimum value are compared with the teacher data. Therefore, even when a plurality of combustors are arranged, the subtle temperature change of the combustion gas can be accurately grasped as in the first aspect of the invention. Can be found in.

  In addition, when it is determined that an abnormality has occurred in any of the combustors, a weight value is set according to the probability of detecting that value for each measuring means that has detected the minimum value or maximum value of the measured temperature. In consideration of the turning characteristics, it is determined that an abnormality has occurred in the combustor corresponding to the position having the highest total weight value. As described above, since the combustor is specified based on the weight value based on the measurement probability, even when a plurality of measuring means measure the same temperature change, the combustor in which an abnormality has occurred is accurately identified. It can be carried out.

  In addition, the abnormality determination process in the said calculating means can also be performed as follows. That is, the temperature of the combustion gas stored in the storage unit over a predetermined period is classified for each predetermined output range for each measuring unit, an average value is calculated, and the maximum value of the average value for each output range In addition, the maximum value and the minimum value of the average value are compared with the teacher data, and when the difference is equal to or greater than the predetermined value, it is determined that an abnormality has occurred in any of the combustors. You can also

  Further, in the above system, when weight values are assigned on the calculation line, if the weight values corresponding to each specified measuring means are given on the calculation line over a predetermined range with the specific position as the center, variation in turning characteristics is caused. As a result, the combustor in which an abnormality has occurred can be identified more accurately.

  Further, the third aspect of the present invention is a combustor, a turbine blade that is rotated by combustion gas supplied from the combustor, and an exhaust unit into which combustion gas after working on the turbine blade is introduced, A combustion monitoring method for a gas turbine provided with a measuring means provided in the exhaust unit for measuring the temperature of the combustion gas, which is made to achieve the first object, and is performed at predetermined time intervals. Storing the temperature of the combustion gas detected by the measuring means in association with the output of the gas turbine at that time, and the temperature of the combustion gas stored in the storage means over a predetermined period of time The combustor is classified for each output range, the maximum value and the minimum value are calculated for each output range, the maximum value and the minimum value are compared with the teacher data, and the difference is equal to or greater than a predetermined value. Is abnormal And a and determining forms.

  According to this configuration, as in the first aspect of the invention, since the abnormality of the combustor can be detected before the combustor completely fails, effective maintenance can be performed.

  Further, according to a fourth aspect of the present invention, there are provided a plurality of combustors arranged in an annular shape, turbine blades rotated by combustion gas supplied from the combustors, and combustion gas after working on the turbine blades. A combustion monitoring method for a gas turbine, comprising: an exhaust section to be introduced; and a plurality of measurement means that are annularly arranged in the exhaust section so as to face the plurality of combustors and measure the temperature of the combustion gas. , Which is made to achieve the second object, and stores the temperature of the combustion gas detected by the measuring means every predetermined time in association with the output of the gas turbine at that time; The temperature of the combustion gas stored in the storage means over a predetermined period is classified for each predetermined output range to obtain a maximum value and a minimum value for each measurement means, and an average value of these maximum values and minimum values is obtained respectively. Calculation And comparing the average value with the teacher data, and determining that an abnormality has occurred in any of the combustors when the difference is equal to or greater than a predetermined value; When the measurement means that detects the maximum value or the minimum value of the temperature of the combustion gas at the measured output is identified, the identified measurement is performed for each of the output ranges. Determining a weight value according to the probability that the means has detected the maximum value or minimum value of the temperature of the combustion gas, and the position of each measurement means is identified corresponding to the circumference where the plurality of measurement means are arranged. A step of defining a calculation line, and a turning angle corresponding to the output range is derived based on a predetermined turning characteristic, and for each output range, the turning direction is opposite to the turning direction from the specified position of each measuring means. The performance returned by the turning angle The step of assigning the weight value to a specific position on the line and the calculation line for each output range to which the weight value is attached are overlapped, and an abnormality occurs in the combustor corresponding to the position having the highest sum of the weight values. And a step of determining that it is present.

  According to this configuration, similarly to the second aspect of the invention, it is possible to quickly detect an abnormality in the combustor and to accurately identify the combustor in which the abnormality has occurred. The abnormality determination process can also be performed as follows. That is, the temperature of the combustion gas stored in the storage unit over a predetermined period is classified for each predetermined output range for each measuring unit, an average value is calculated, and the maximum value of the average value for each output range In addition, the maximum value and the minimum value of the average value are compared with the teacher data, and when the difference is equal to or greater than the predetermined value, it is determined that an abnormality has occurred in any of the combustors. You can also Further, in the above method, when attaching the weight value on the operation line, if the weight value corresponding to each specified measuring means is applied on the operation line over a predetermined range centering on the specific position, Identification can be performed more accurately.

  According to the combustion monitoring system and the combustion monitoring method for a gas turbine according to the present invention, it is possible to reliably detect that an abnormality has occurred in any of the combustors. Further, when an abnormality occurs in any of the combustors, the combustor in which the abnormality has occurred can be accurately identified.

  Next, an embodiment of a gas turbine combustion monitoring system according to the present invention will be described. FIG. 1 is a block diagram showing a schematic configuration of a system according to the present invention.

  In the following, in order to describe the case where this system is applied to the gas turbine of FIG. 13 shown in the conventional example, this figure is also referred to as appropriate. In this gas turbine, 14 combustors are arranged in an annular shape, and 27 thermocouples (measuring means) are arranged in an annular shape at a predetermined position in the exhaust part facing the combustor.

  As shown in FIG. 1, the system of the present embodiment includes a database 1 (storage means) and a calculation unit 3 (calculation means). The database 1 is connected to a temperature measuring device 551 (measuring means) composed of each thermocouple disposed in the exhaust section 55 of the gas turbine, and an output measuring device 57 that measures the output of the generator, and the thermocouple 551. Is stored in association with the temperature of the combustion gas detected in step 1 and the output of the generator at that time. In this embodiment, as an example, the temperature detected by each thermocouple 551 every other minute is stored. The database 1 also stores teacher data to be described later and turning characteristics of the target gas turbine. In the present embodiment, the output of the generator is regarded as equivalent to the output of the gas turbine. Hereinafter, unless otherwise specified, the “output of the gas turbine” represents the output of the generator.

  The calculation unit 3 has two functions. The first function reads out the temperature of the combustion gas over a predetermined period from the database 1 and the output corresponding thereto, and compares them with the teacher data, so that any one of the combustors 532 has an abnormality. It is to determine whether or not. On the other hand, the second function is to identify the combustor 532 in which an abnormality has occurred when it is determined that an abnormality has occurred in the combustor 532.

  First, the first function will be described with reference to the drawings. FIG. 2 is a flowchart showing abnormality determination processing for the combustor. In this combustion monitoring system, first, as described above, the combustion gas temperature is measured by each thermocouple 551 every minute, and the output at that time and the combustion gas temperature are associated with each other and stored in the database 1 (step S1). ). These data are stored in the database 1 in the format shown in FIG. 3, for example. That is, the output of the gas turbine at a certain time and the temperature of the combustion gas detected by each thermocouple (No. 1 to 27) at this time are stored every other minute. Next, data for a predetermined period to be inspected, for example, 24 hours of a day is read from the database 1 (step S2). The data read at this time is 1440 pieces (= 60 (minutes) × 24 (hours)) for each thermocouple 551. The data read out in this way is rearranged in the order of the smaller output in the calculation unit 3 (step S3). FIG. 4 shows the rearranged data.

  Subsequently, in the calculation unit, as shown in FIG. 5A, after reading the maximum value and the minimum value of the measured temperature in each thermocouple 551 within a predetermined output range, for example, 1 MW, An average value of the minimum values is calculated (step S4). In FIG. 5B, as an example, the maximum value and the minimum value of the temperature detected by each thermocouple at the output of 61.0 to 61.9 MW are shown, and the average value of the maximum value and the minimum value is derived. doing. Subsequently, the average value of the minimum value or the maximum value calculated in this way is arranged from the smallest output and compared with the teacher data. FIG. 6 is a graph showing the relationship between the average of the minimum values of the combustion gas temperature and the output. Here, the teacher data uses the relationship between the average of the minimum value or the maximum value derived in the same manner as described above and the output when the soundness of the gas turbine to be monitored after the periodic inspection is estimated. The standard value common to all gas turbines is not used. This is because gas turbines vary greatly from one individual to another, and combustion characteristics may change each time when disassembled and assembled by periodic inspection.

  Then, as shown in FIG. 6, the calculation unit 3 compares the derived minimum value with the teacher data, and if there is a predetermined value or more, for example, if the temperature difference for each output is 8 ° C. or more on average, It is determined that an abnormality has occurred in the combustor 532 (step S5). Although the minimum value is shown in the above example, the comparison between the maximum value and the teacher data is performed in the same manner. That is, if there is a temperature difference equal to or greater than a predetermined value between the teacher data and the maximum value or the minimum value, it is determined that an abnormality has occurred. If it is determined that no abnormality has occurred, the process ends (NO in step S5).

  When it is determined that an abnormality has occurred in any of the combustors 532 through the above steps, it is necessary to identify which combustor has an abnormality. Hereinafter, identification of the combustor in which an abnormality has occurred will be described.

  If it is determined that an abnormality has occurred (YES in step S5), the calculation unit 3 causes the combustor 532 to use the data determined to be abnormal, that is, the average of the maximum value or the average of the minimum value. Identify. For example, when an abnormality is recognized in the minimum value, it is determined for each output range which thermocouple 551 the minimum value was measured, and based on the probability that the minimum value was measured by the specified thermocouple. The weight value is determined (step S6). An example is shown in FIG.

  In the figure, the temperature of the combustion gas detected in an output range of 62.0 to 62.9 MW is shown. Here, first, the minimum value in each output is specified. In this example, 615 ° C. is measured twice as the minimum value at the output of 62.2 MW in the first row. In addition, at the output of 62.9 MW in the fourth column, 616 ° C. is observed once as the minimum value. Thus, the minimum value is measured 6 times in the range of output from 62.0 to 62.9 MW. From this, the detection probability for each thermocouple is calculated. For example, in the thermocouple No. 21, since the minimum value is measured once, the detection probability of this thermocouple is 1/6 = 0.17, and this value becomes the weight value. Further, in the thermocouple No. 26, since the minimum value is measured three times, the detection probability, that is, the weight value is 3/6 = 0.5. Similarly, the thermocouple No. 27 has a weight value of 0.33. Thus, FIG. 8 is a graph in which the detection probability of the minimum temperature of each thermocouple is weighted for each output range and is graphed. In this graph, a high weight value is represented by a dark color.

  In addition, while the minimum temperature of 615 ° C. is measured twice with the thermocouples No. 26 and No. 27 at an output of 62.5 MW (third column in the table), in the above description, this is the No. 26 and No. 27 In each of the above, the number of measurements is counted once, but the following may be used. That is, the measurement at 615 ° C. may be considered as one measurement, and may be assigned 0.5 times to 26th and 27th. As a result, the number of times of measurement of the minimum temperature at No. 26 is 2.5, and the number of times of measurement at No. 27 is 1.5, and the weight value can be determined based on this.

  Next, an abnormal combustor is identified in consideration of the turning characteristics. In the gas turbine, since the turbine blade 531 is rotating, the combustion gas emitted from the combustor 532 does not flow straight into the exhaust part 55 in the axial direction as it is, but turns to the exhaust part 55 while turning. Flows in. FIG. 9 is a graph showing an example of a turning characteristic showing a relationship between the turning angle and output of the combustion gas. This turning characteristic makes it possible to derive the turning angle at a certain output. This turning characteristic is stored in the database 1.

  Subsequently, the combustor in which an abnormality has occurred is specified for each output range based on the turning characteristics. Taking the range of the output of 62.0 to 62.9 MW shown in FIG. 7 as an example, first, the turning angle in this range is derived based on the turning characteristics. When the derived turning angle is θ, an angle within a predetermined range (± α), for example, θ ± 15 °, is used as the calculated turning angle in consideration of variation. Also, corresponding to the circumference where the thermocouple 551 is arranged, a calculation line in which the position of each thermocouple 551 is specified is specified, and the calculated turning angle is opposite to the turning direction from each thermocouple for which the lowest temperature is measured. Returning to the direction, a weight value is assigned to the operation line (step S7). For example, as shown in FIG. 10, a weight value of 0.50 is assigned to a range returned by θ ± 15 ° from the position where the 26th thermocouple on the operation line 21 is arranged. Similarly, a weight value of 0.33 is assigned to a range returned by θ ± 15 ° from the position where the No. 27 thermocouple is disposed. Furthermore, a weight value of 0.17 is assigned to the 21st thermocouple.

  Thus, after assigning a weight value on the calculation line 21 for each output range, as shown in FIG. 11, these calculation lines 21 are overlapped to identify a position having the highest weight value (step S8). There are various methods for specifying the position in this case. For example, a block 22 having a height corresponding to each weight value and a width corresponding to the range α is stacked, and a distribution 23 of weight values is obtained. Create and identify the highest height in this distribution. Then, the calculation line 21 and the line segment 24 where the combustor is arranged are associated with each other, and the combustor in the portion where the height of the distribution 23 is the highest is specified as the combustor in which the abnormality has occurred (step) S9). In this example, it can be recognized that an abnormality has occurred in the number 10 combustor.

  As described above, according to the present embodiment, the temperature of the combustion gas measured over 24 hours is read for each thermocouple for each output of the gas turbine, and the maximum value and the minimum value are read. Comparison with data. In this way, since the average value of the temperature change of the combustion gas is used, the subtle temperature change of the combustion gas is grasped compared to the case where the instantaneous temperature measured as in the conventional example is directly compared with the reference value. It becomes possible to do. Therefore, it is possible to detect an abnormality in the combustor at an early stage. As a result, a maintenance plan can be prepared in advance simultaneously with the discovery of the abnormality of the combustor, so that the combustor can be effectively maintained.

  In addition, when it is determined that an abnormality has occurred in any of the combustors, the weight value corresponding to the probability of detecting the value of each thermocouple 551 that has detected the minimum value or maximum value of the measured temperature. In consideration of the turning characteristics, it is determined that an abnormality has occurred in the combustor corresponding to the position having the highest total weight value. Thus, since the combustor is specified based on the weight value based on the measurement probability, for example, even when a plurality of thermocouples 551 measure the same temperature change, the combustor in which an abnormality has occurred is specified. Can be done accurately.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to this, A various change is possible unless it deviates from the meaning. For example, in the above embodiment, in the process of determining the abnormality of the combustor 532, the maximum value and the minimum value of the measured temperature for each thermocouple 551 are read and then averaged for all the thermocouples. You can also do the following: That is, as shown in FIG. 12A, the average value of the combustion gas temperature detected by each thermocouple 551 within a predetermined output range, for example, every 1 MW is calculated, and as shown in FIG. The maximum value and the minimum value of the average value calculated within each output range for each thermocouple 551 can also be derived. As described above, the method shown in FIGS. 5 and 13 is shown as a method for deriving the maximum value and the minimum value. However, these methods may be used to derive the average value after reading the maximum value and the minimum value, or It is only the difference in the calculation order of calculating the average value and then deriving the maximum value and the minimum value, and there is no big difference in the finally obtained value regardless of which method is used. The effects of the present invention can be sufficiently obtained.

  In the above embodiment, the calculated turning angle θ ± α obtained by adding a predetermined range α to the turning angle θ based on the turning characteristics is used for weighting, but the calculated turning angle θ ± α is not used. The turning angle θ can be used as it is. However, it is preferable to use the calculated turning angle in order to specify the combustor more accurately.

  Furthermore, in the said embodiment, although the gas turbine provided with the several combustor is made into object, it is applicable also to the gas turbine provided with only one combustor. In this case, since it is not necessary to specify the combustor in which the abnormality has occurred, the abnormality may be detected by comparing the minimum value and the maximum value of the measured values of the combustion gas with the teacher data.

  In the said embodiment, although the thermocouple is used as a measurement means, if the temperature of combustion gas can be measured, other measuring apparatuses can also be used.

It is a block diagram which shows schematic structure of the combustion monitoring system of the gas turbine which concerns on this invention. It is a flowchart which shows the combustion monitoring process of a gas turbine. It is an example of the measurement temperature of the combustion gas memorize | stored in the database of FIG. It is the example which rearranged the measured temperature of FIG. 3 for every output. It is a figure explaining the example which derives | leads-out the minimum value and the maximum value compared with teacher data from the measured temperature shown in FIG. 6 is a graph comparing the minimum value derived in FIG. 5 with teacher data. It is explanatory drawing which derives | leads-out the measurement frequency of the minimum value. It is the graph which showed the measurement probability of the minimum value for every thermocouple. It is the graph which showed an example of turning characteristics. It is a figure which shows the outline of a calculation line. It is a figure explaining the identification of the combustor in which the abnormality has occurred due to the superposition of operation lines. It is a figure explaining the other example which derives | leads-out the minimum value and maximum value compared with teacher data from the measured temperature shown in FIG. It is a partially cutaway perspective view showing an example of a gas turbine.

Explanation of symbols

1 Database 3 Calculation unit (calculation means)
531 Turbine Blade 532 Combustor 55 Exhaust Portion 551 Thermocouple (Measuring Means)

Claims (8)

A combustor, a turbine blade rotated by combustion gas supplied from the combustor, an exhaust part into which combustion gas after working on the turbine blade is introduced, and the combustion gas provided in the exhaust part A combustion monitoring system provided in a gas turbine comprising a measuring means for measuring the temperature of
Storage means for storing the temperature of the combustion gas detected by the measurement means every predetermined time in association with the output of the gas turbine at that time;
The temperature of the combustion gas stored in the storage means over a predetermined period is classified for each predetermined output range, the maximum value and the minimum value are calculated for each output range, and the maximum value, the minimum value, and the teacher are calculated. A combustion monitoring system for a gas turbine, comprising: calculating means for comparing data and determining that an abnormality has occurred in the combustor when the difference is equal to or greater than a predetermined value. A plurality of combustors arranged in an annular shape, a turbine blade rotated by combustion gas supplied from the combustor, an exhaust section into which combustion gas after working on the turbine blade is introduced, and the plurality A combustion monitoring system provided in a gas turbine comprising a plurality of measuring means arranged in a ring shape in the exhaust part so as to face the combustor of the gas and measuring the temperature of the combustion gas,
Storage means for storing the temperature of the combustion gas detected by the measurement means every predetermined time in association with the output of the gas turbine at that time;
The temperature of the combustion gas stored in the storage means over a predetermined period is classified for each predetermined output range to obtain a maximum value and a minimum value for each measurement means, and an average value of these maximum values and minimum values is obtained respectively. Computation means that, after calculating, compares this average value with the teacher data and determines that an abnormality has occurred in any of the combustors when the difference is equal to or greater than a predetermined value,
When it is determined that an abnormality has occurred in any of the combustors, the calculation means
After specifying the measurement means that has detected the maximum value or minimum value of the temperature of the combustion gas at each measured output, for each output range, each of the specified measurement means has the maximum value of the temperature of the combustion gas or Determine the weight value according to the probability of detecting the minimum value,
Corresponding to the circumference where the plurality of measuring means are arranged, the calculation line in which the position of each measuring means is specified is defined,
Deriving a turning angle in accordance with the output range based on a predetermined turning characteristic, and calculating for each output range a return of the turning angle from the position of each specified measuring means in a direction opposite to the turning direction. Attaching the weight value to a specific position on the line,
Furthermore, a combustion monitoring system for a gas turbine that determines that an abnormality has occurred in a combustor corresponding to a position where the sum of the weight values is highest by superimposing operation lines for each of the output ranges to which the weight values are attached. . A plurality of combustors arranged in an annular shape, a turbine blade rotated by combustion gas supplied from the combustor, an exhaust section into which combustion gas after working on the turbine blade is introduced, and the plurality A combustion monitoring system provided in a gas turbine comprising a plurality of measuring means arranged in a ring shape in the exhaust part so as to face the combustor of the gas and measuring the temperature of the combustion gas,
Storage means for storing the temperature of the combustion gas detected by the measurement means every predetermined time in association with the output of the gas turbine at that time;
The temperature of the combustion gas stored in the storage means over a predetermined period is classified for each predetermined output range for each measurement means, and an average value is calculated. The maximum value and the minimum value of the average value are calculated for each output range. An operation for deriving a value and comparing the maximum value and the minimum value of the average value with teacher data and determining that an abnormality has occurred in any of the combustors when the difference is equal to or greater than a predetermined value Means and
When it is determined that an abnormality has occurred in any of the combustors, the calculation means
After specifying the measurement means that has detected the maximum value or minimum value of the temperature of the combustion gas at each measured output, for each output range, each of the specified measurement means has the maximum value of the temperature of the combustion gas or Determine the weight value according to the probability of detecting the minimum value,
A calculation line in which the position of each measuring means is specified corresponding to the circumference where the plurality of measuring means are arranged,
Deriving a turning angle in accordance with the output range based on a predetermined turning characteristic, and calculating for each output range a return of the turning angle from the position of each specified measuring means in a direction opposite to the turning direction. Attaching the weight value to a specific position on the line,
Furthermore, a combustion monitoring system for a gas turbine that determines that an abnormality has occurred in a combustor corresponding to a position where the sum of the weight values is highest by superimposing operation lines for each of the output ranges to which the weight values are attached. .   The weight value corresponding to each of the specified measurement means is attached to the calculation line over a predetermined range centering on the specific position when the weight value is attached to the calculation line. A gas turbine combustion monitoring system as described. A combustor, a turbine blade rotated by combustion gas supplied from the combustor, an exhaust part into which combustion gas after working on the turbine blade is introduced, and the combustion gas provided in the exhaust part A combustion monitoring method for a gas turbine comprising a measuring means for measuring the temperature of
Storing the temperature of the combustion gas detected by the measuring means every predetermined time in association with the output of the gas turbine at that time;
The temperature of the combustion gas stored in the storage means over a predetermined period is classified for each predetermined output range, the maximum value and the minimum value are calculated for each output range, and the maximum value, the minimum value, and the teacher are calculated. A combustion monitoring method for a gas turbine comprising: comparing data and determining that an abnormality has occurred in the combustor when the difference is equal to or greater than a predetermined value. A plurality of combustors arranged in an annular shape, a turbine blade rotated by combustion gas supplied from the combustor, an exhaust section into which combustion gas after working on the turbine blade is introduced, and the plurality A gas turbine combustion monitoring method comprising: a plurality of measuring means arranged in a ring shape in the exhaust portion so as to face the combustor of the gas generator, and measuring the temperature of the combustion gas;
Storing the temperature of the combustion gas detected by the measuring means every predetermined time in association with the output of the gas turbine at that time;
The temperature of the combustion gas stored in the storage means over a predetermined period is classified for each predetermined output range to obtain a maximum value and a minimum value for each measurement means, and an average value of these maximum values and minimum values is obtained respectively. After calculating, comparing the average value with the teacher data, and determining that an abnormality has occurred in any of the combustors when the difference is equal to or greater than a predetermined value;
When it is determined that an abnormality has occurred in any of the combustors, the measurement means that detects the maximum or minimum value of the temperature of the combustion gas in the measured output is identified, and then the output range is determined for each output range. Determining a weight value corresponding to the probability that each of the specified measuring means has detected the maximum value or the minimum value of the temperature of the combustion gas;
Defining a calculation line in which the position of each measuring means is specified corresponding to the circumference where the plurality of measuring means are arranged;
Deriving a turning angle in accordance with the output range based on a predetermined turning characteristic, and calculating for each output range a return of the turning angle from the position of each specified measuring means in a direction opposite to the turning direction. Attaching the weight value to a specific position on the line;
A gas turbine comprising: superimposing calculation lines for each of the output ranges to which the weight values are attached, and determining that an abnormality has occurred in a combustor corresponding to a position having the highest sum of the weight values. Combustion monitoring method. A plurality of combustors arranged in an annular shape, a turbine blade rotated by combustion gas supplied from the combustor, an exhaust section into which combustion gas after working on the turbine blade is introduced, and the plurality A gas turbine combustion monitoring method comprising: a plurality of measuring means arranged in a ring shape in the exhaust portion so as to face the combustor of the gas generator, and measuring the temperature of the combustion gas;
Storing the temperature of the combustion gas detected by the measuring means every predetermined time in association with the output of the gas turbine at that time;
The temperature of the combustion gas stored in the storage means over a predetermined period is classified for each predetermined output range for each measurement means, and an average value is calculated. The maximum value and the minimum value of the average value are calculated for each output range. A step of deriving a value and comparing the maximum value and the minimum value of the average value with teacher data, and determining that an abnormality has occurred in any of the combustors when the difference is equal to or greater than a predetermined value When,
When it is determined that an abnormality has occurred in any of the combustors, the measurement means that detects the maximum or minimum value of the temperature of the combustion gas in the measured output is identified, and then the output range is determined for each output range. Determining a weight value corresponding to the probability that each of the specified measuring means has detected the maximum value or the minimum value of the temperature of the combustion gas;
Defining a calculation line in which the position of each measuring means is specified corresponding to the circumference where the plurality of measuring means are arranged;
Deriving a turning angle in accordance with the output range based on a predetermined turning characteristic, and calculating for each output range a return of the turning angle from the position of each specified measuring means in a direction opposite to the turning direction. Attaching the weight value to a specific position on the line;
A gas turbine comprising: superimposing calculation lines for each of the output ranges to which the weight values are attached, and determining that an abnormality has occurred in a combustor corresponding to a position having the highest sum of the weight values. Combustion monitoring method. The weight value corresponding to each of the specified measurement means is attached to the calculation line over a predetermined range centering on the specific position when the weight value is attached to the calculation line. The gas turbine combustion monitoring method described.

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