Damage control device for high-temperature steam turbine parts

Abstract

To provide a damage amount management device for a high-temperature component of a steam turbine, which can time-sequentially recognize damage amounts from past to present predicted on the basis of measured information and a future damage amount predicted on the basis of a future operation condition.SOLUTION: According to an embodiment, a damage amount management device 100 for a high-component of a steam turbine includes a display information generation part 128 for generating display information for displaying past damage amount related information showing information on damage amounts of the high-temperature component of the steam turbine from past to present calculated on the basis of measured information, and future damage amount related information showing information on a future damage amount of the high-temperature component in the future calculated on the basis of a future operation condition inputted in operation using an input screen of a user interface 140 and the past damage amount related information on the display screen of the user interface 140.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] An embodiment of the present invention relates to a damage amount management system for a high temperature component of a steam turbine. [Background technology]

[0002] High-temperature parts such as casings and rotors used in steam turbines gradually lose their lifespan over time due to creep and fatigue, and there is a risk that cracks and damage will eventually occur. For this reason, in the past, appropriate evaluation required measurements and non-destructive testing of the actual equipment.

[0003] In recent years, the introduction of renewable energy has been accelerating in power generation facilities as a measure to reduce carbon dioxide (CO2) emissions. When generating electricity using renewable energy, the amount of power generated varies depending on factors such as the weather. For this reason, in recent years, thermal power generation facilities have shifted to operations centered on regulating thermal power in order to compensate for the unstable power supply caused by power generation using renewable energy. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 9-26273 [Patent Document 2] Patent No. 4575176 [Patent Document 3] Japanese Patent Application Laid-Open No. 2002-297710 Summary of the Invention [Problem to be solved by the invention]

[0005] As described above, thermal power plants equipped with steam turbines are shifting from operation centered on rated load to operation centered on adjustable thermal power. The shift to adjustable thermal power operation increases the frequency of start-stops and load fluctuations. As a result, it becomes difficult to maintain a steady operating temperature for the high-temperature components of steam turbines, particularly the rotors and casings of the high-pressure and intermediate-pressure turbines, which are used in high-temperature environments. This increases the rate of crack propagation due to fatigue damage, creating severe conditions in terms of remaining life.

[0006] An object of the present invention is to provide a damage amount management device for high-temperature components of a steam turbine, which is capable of recognizing, in time series, the amount of damage from the past to the present predicted based on measured information and the amount of future damage predicted based on future operating conditions. [Means for solving the problem]

[0007] In order to achieve the above object, a damage amount management device for a high-temperature component of a steam turbine according to an embodiment includes: a display information generating unit that generates display information for displaying, on the input display screen of the user interface, past damage amount related information indicating information regarding damage amounts of high-temperature parts consisting of a turbine casing or a turbine rotating part of the steam turbine from the past to the present, calculated based on measured information, and future damage amount related information indicating information regarding future operating conditions input through an operation using the input display screen of the user interface and future damage amounts of the high-temperature parts in the future, calculated based on the past damage amount related information, wherein the future operating conditions include a ratio of the number of days in each of a plurality of operating patterns indicating temporal changes in the load of the steam turbine in one day to the number of days in a year; It is characterized by: [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a system diagram that schematically shows the configuration of a power plant that includes a steam turbine having a damage amount management device according to a first embodiment. [Figure 2] 1 is a block diagram showing a functional configuration of a damage amount management device according to a first embodiment. [Figure 3] FIG. 4 is a diagram showing an example of an input screen for chipping depth of a high-pressure outer compartment displayed on a user interface in the damage amount management device according to the first embodiment. [Figure 4] FIG. 3 is a diagram showing an example of an input screen for future operating conditions displayed on a user interface in the damage amount management device according to the first embodiment. [Figure 5] FIG. 3 is a flowchart showing the procedure of a crack growth evaluation step performed by the damage amount management device according to the first embodiment. [Figure 6] FIG. 3 is a flowchart showing the procedure of future prediction calculation by the damage amount management device according to the first embodiment. [Figure 7] 5A and 5B are diagrams showing an example of the results of periodic calculation and future prediction calculation of a high-pressure external compartment displayed on a user interface in the damage amount management device according to the first embodiment. [Figure 8] 4 is a diagram showing an example of the results of periodic calculation and future prediction calculation of the intermediate-pressure turbine rotating part displayed on the user interface of the damage amount management device according to the first embodiment. FIG. [Figure 9] FIG. 2 is a flowchart for explaining the steps of setting the basic environment in the damage amount management method by the damage amount management device according to the first embodiment. [Figure 10] FIG. 3 is a flowchart for explaining the procedure of periodic calculation processing in the damage amount management method by the damage amount management device according to the first embodiment. [Figure 11] FIG. 3 is a flowchart for explaining the procedure of future prediction calculation processing in the damage amount management method by the damage amount management device according to the first embodiment. [Figure 12] FIG. 10 is a first flowchart for explaining a future prediction calculation process in the damage amount management device according to the second embodiment. [Figure 13] FIG. 10 is a second flowchart illustrating the future prediction calculation process in the damage amount management device according to the second embodiment. [Figure 14] FIG. 10 is a diagram showing an example of a display screen in the damage amount management device according to the second embodiment. [Figure 15] FIG. 11 is a diagram showing an example of a selection screen for selecting a comparison calculation result to be displayed on a user interface in the damage amount management device according to the second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, a damage amount management system for a high-temperature component of a steam turbine (hereinafter referred to as a "damage amount management system") according to an embodiment of the present invention will be described with reference to the drawings. Hereinafter, identical or similar parts will be denoted by common reference numerals, and overlapping descriptions will be omitted.

[0010] FIG. 1 is a system diagram that schematically shows the configuration of a power plant 1 that includes a steam turbine 10 having a damage amount management device 100 according to a first embodiment.

[0011] The power plant 1 includes a steam turbine 10, a generator 20, and a heat source device 30. Here, the heat source device 30 includes a boiler 31 and a reheater 32.

[0012] As shown in FIG. 1, a steam turbine 10 includes a high-pressure turbine 11, an intermediate-pressure turbine 12, a low-pressure turbine 13, a condenser 16, a feedwater pump 17, and a damage amount management device 100. The high-pressure turbine 11 has a high-pressure turbine rotating section 11a, a high-pressure outer casing (high-pressure outer casing) 11b, and a high-pressure inner casing (high-pressure inner casing) 11c. The illustrated example includes two intermediate-pressure turbines 12. Each intermediate-pressure turbine 12 has an intermediate-pressure turbine rotating section 12a, an intermediate-pressure outer casing (intermediate-pressure outer casing) 12b, and an intermediate-pressure inner casing (intermediate-pressure inner casing) 12c. Here, the high-pressure turbine rotating section 11a and the intermediate-pressure turbine rotating section 12a are each a rotor shaft on which a plurality of moving blades (vanes) are implanted.

[0013] The boiler 31 generates steam by heating feedwater supplied from the steam turbine 10 side. The steam generated in the boiler 31 is guided to the high-pressure turbine 11 via the main steam pipe 33. The high-pressure turbine 11 converts the thermal energy of the steam introduced from the main steam pipe 33 into rotational energy of the high-pressure turbine rotating section 11a, etc., and discharges the steam that has done work in the high-pressure turbine 11 to a low-temperature reheat pipe 34. The steam discharged to the low-temperature reheat pipe 34 is introduced into the reheater 32. The reheater 32 reheats the introduced steam and outputs the steam to the high-temperature reheat pipe 35.

[0014] The intermediate-pressure turbine 12 converts the thermal energy of the steam introduced from the high-temperature reheat pipe 35 into rotational energy, and discharges the steam that has done work in the intermediate-pressure turbine 12 into the crossover pipe 14. The low-pressure turbine 13 converts the thermal energy of the steam introduced from the crossover pipe 14 into rotational energy for a low-pressure turbine rotating section (not shown), etc., and discharges the steam that has done work in the low-pressure turbine 13 into an exhaust pipe 15. The generator 20 is driven by the high-pressure turbine 11, the intermediate-pressure turbine 12, and the low-pressure turbine 13, and converts the rotational energy into electrical energy to generate electricity.

[0015] The condenser 16 condenses the steam introduced from the exhaust pipe 15 to produce condensed water. The feedwater pump 17 supplies the condensed water of the condenser 16 to the boiler 31 via the feedwater pipe 18 as feedwater.

[0016] The damage quantity management device 100 is a device for managing the soundness of the steam turbine 10 with respect to crack propagation due to fatigue damage and creep damage. Each state quantity related to the steam turbine 10 is measured by a respective detector (not shown), and these signals are input into a power plant control device 40, such as a DCS (Distributed Control System). The damage quantity management device 100 acquires measurement data necessary for damage quantity management from the power plant control device 40. Details of the damage quantity management device 100 will be described later. Note that, although the following description uses a high-temperature component of the steam turbine 10 as an example of an object managed by the damage quantity management device 100, the following content can also be applied to cracks caused by creep and fatigue, such as the casing of a steam valve.

[0017] In this embodiment, the high-temperature components of the steam turbine 10 targeted by the damage quantity management device 100 are the high-pressure turbine rotating section 11a, high-pressure outer casing 11b, and high-pressure inner casing 11c of the high-pressure turbine 11, and the intermediate-pressure turbine rotating section 12a, intermediate-pressure outer casing 12b, and intermediate-pressure inner casing 12c of the intermediate-pressure turbine 12. Hereinafter, the high-pressure turbine rotating section 11a and the intermediate-pressure turbine rotating section 12a will be collectively referred to as the turbine rotating section 10a. Also, the high-pressure outer casing 11b, high-pressure inner casing 11c, intermediate-pressure outer casing 12b, and intermediate-pressure inner casing 12c will be collectively referred to as the casing 10b. Also, the turbine rotating section 10a will be hereinafter referred to as the rotor.

[0018] <Configuration of the damage amount management device> Next, the damage amount management device 100 will be described.

[0019] FIG. 2 is a block diagram showing the functional configuration of the damage amount management device 100 according to the first embodiment.

[0020] The damage amount management device 100 is a device that manages the amount of damage by, for example, predicting the amount of crack growth, crack length, and damage from the past to the present based on information measured by an actual machine (hereinafter referred to as "measurement information" or "measured information"), and predicting the amount of crack growth, crack length, and damage in the future based on assumed future operating conditions. The damage amount management device 100 also generates display information for displaying the predicted results, such as the amount of damage, on a display unit. The measurement information includes time information when the measurement value was taken.

[0021] 2, the damage amount management device 100 includes a measurement information acquisition unit 110, a calculation unit 120, a storage unit 130, a user interface 140, and a progress control unit 150. The damage amount management device 100 is, for example, a computer system, but may also be a collection of individual devices or equipment that have the functions of each element.

[0022] The measurement information acquisition unit 110 is an interface that acquires measurement data necessary for damage amount management from the power plant control device 40. The measurement information acquisition unit 110 acquires measurement information (hereinafter also referred to as measurement data) related to the steam turbine 10 during operation that is necessary for damage amount management from the measurement data input into the power plant control device 40 at a predetermined time interval (measurement information acquisition period), such as one minute.

[0023] The measurement information includes, for example, steam conditions such as main steam pressure, main steam temperature, and reheat steam temperature, the rotation speed of the turbine rotating section 10a, and state quantities inside the turbine such as the inlet pressure or outlet pressure of the first stage nozzle of the high-pressure turbine 11, and state quantities such as the temperature of the casing 10b.

[0024] The measurement information acquisition unit 110 outputs the acquired measurement information to the measurement information storage unit 132 of the storage unit 130. The measurement information storage unit 132 stores and stores this measurement information.

[0025] The calculation unit 120 includes a state quantity calculation unit 121, a stress evaluation unit 122, an embrittlement calculation unit 123, a fatigue crack growth calculation unit 124, a creep crack growth calculation unit 125, a damage amount calculation unit 126, a future prediction unit 127, and a display information generation unit 128.

[0026] Of the calculation unit 120, the state quantity calculation unit 121, stress evaluation unit 122, embrittlement calculation unit 123, fatigue crack growth calculation unit 124, creep crack growth calculation unit 125, and damage amount calculation unit 126, which will be described below, are parts involved in periodic calculation processing, which is calculation processing related to the crack length a, crack depth d, and damage amount D from the past to the present.

[0027] The state quantity calculation unit 121 performs an estimation calculation of the state quantity used in the heat transfer calculation based on the measurement information acquired by the measurement information acquisition unit 110 at each measurement information acquisition period, such as one minute. Specifically, the measurement information acquisition period, such as one minute, is divided into state quantity calculation intervals (stress calculation periods), such as 10 seconds. Assuming that the change in the state quantity between each piece of measurement information acquired at each measurement information acquisition period is linear, the state quantity at each stress calculation period is calculated by interpolation.

[0028] The stress evaluation unit 122 calculates stress in the evaluation portion, specifically, stress due to external forces such as thermal stress and pressure and centrifugal force, based on the state quantity calculated by the state quantity calculation unit 121 for each stress calculation cycle.

[0029] The embrittlement calculation unit 123 calculates the embrittlement degree of the material of the evaluation area based on the material data stored in the program memory unit 133 that stores the program installed for the damage amount management device 100, and the temperature of the evaluation area calculated by the state quantity calculation unit 121, etc.

[0030] The fatigue crack growth calculation unit 124 calculates the fatigue crack growth rate of the evaluation portion at a damage amount calculation period, such as one day, based on the stress of the evaluation portion calculated by the stress evaluation unit 122 and the embrittlement degree of the material of the evaluation portion calculated by the embrittlement calculation unit 123. As a result, a new crack growth amount is obtained.

[0031] The creep crack growth rate is calculated based on the stress of the evaluation portion calculated by the creep crack growth calculation portion 125 and the stress evaluation portion 122, the embrittlement degree of the material of the evaluation portion calculated by the embrittlement calculation portion 123, and the material data stored in the program storage portion 133. As a result, a new crack growth amount is obtained.

[0032] In the following, fatigue crack growth and creep crack growth will be collectively referred to as crack growth, and the fatigue crack growth amount and creep crack growth amount will be collectively referred to as crack growth amount.

[0033] The damage amount calculation unit 126 multiplies the "crack length a" obtained from the fatigue crack growth rate calculated by the fatigue crack growth calculation unit 124 and the creep crack growth rate calculated by the creep crack growth calculation unit 125 by a conversion constant to convert it into a "crack depth d". This "crack depth d" is converted into a "critical crack depth d". th The damage amount D is calculated by dividing by the conversion constant and the critical crack depth d th " is stored in the program storage unit 133 of the storage unit 130, which will be described later, as data accompanying the program installed in the damage amount management device 100. th Specifically, " is the crack depth [mm] corresponding to the rotor inspection control value and the casing replacement control value, which will be described later.

[0034] The future prediction unit 127 performs future prediction calculation processing, which is a calculation processing related to the crack length a, crack depth d, and damage amount D for the future, i.e., a period after the present. The future prediction unit 127 does not perform calculations such as periodic calculation processing, but rather evaluates and stores in advance the stress generated for each operation pattern based on information input as a future operation plan (see FIG. 4) to the user interface 140 described below, reads the stress, calculates and integrates the amount of damage, and calculates the amount of damage for each year. Here, the information input as the operation plan is the condition for calculation, and therefore will hereinafter also be referred to as the operation condition. The future prediction unit 127 performs future prediction calculation processing based on two conditions: the start-up condition and the operation pattern.

[0035] The start-up conditions are based on the annual number of times each of three patterns: cold start, hot start, and rapid start. Here, a cold start refers to a start-up when the metal temperature inside the high-pressure turbine first stage is below a predetermined temperature (e.g., 180°C) when the steam turbine is started, and generally corresponds to a start-up after several days or more of shutdown. A hot start refers to a start-up when the metal temperature inside the high-pressure turbine first stage is within a predetermined range (e.g., 180 to 350°C) when the steam turbine is started, and generally corresponds to a start-up after about two to three days of shutdown. Furthermore, a rapid start refers to a start-up in as short a time as possible without exceeding the limit values ​​of various transient state values ​​that appear during start-up.

[0036] An operation pattern is the output [MW] at each time of day, in other words, the pattern of time change in output [MW] over the course of a day. The percentage (%) of the number of days for each of the multiple pre-set operation patterns relative to the number of days in a year is input. In the following, an operation pattern may also be referred to as a daily load condition, and a curve showing an operation pattern may also be referred to as a daily load curve.

[0037] A stress history is calculated in advance for each pattern of startup conditions and daily load conditions, and is stored in a pattern-specific stress storage unit 135 of the storage unit 130. These values ​​may be stored in the program storage unit 133 together with the program as data within the program that has been installed and stored in the program storage unit 133 of the storage unit 130.

[0038] The future prediction unit 127 calculates the operating time based on the availability rate of each pattern input as a future operation plan. The future prediction unit 127 also calculates the increase in crack length a, crack depth d, and damage amount D from the stress history stored in the pattern-specific stress storage unit 135 using a method similar to the fixed-period calculation. The future prediction unit 127 adds this increase in damage amount D to the damage amount D of the previous year to calculate it as the damage amount D of the current year. It is also assumed that the increase in damage amount for the current year is linear.

[0039] The display information generation unit 128 generates display information for the input screen and output screen to be displayed on the user interface 140. The input screen will be described later with reference to Figures 3 and 4, and the output screen will be described later with reference to Figures 7 and 8, respectively.

[0040] The storage unit 130 includes an input information storage unit 131, a measurement information storage unit 132, a program storage unit 133, a calculation result storage unit 134, a pattern-specific stress storage unit 135, a template storage unit 136, and a display information storage unit 137. The storage unit 130 is realized by, for example, a hard disk drive, a nonvolatile memory device, or the like. The storage unit 130 may not be physically integrated with the damage amount management device 100, but may be connected via a network (not shown).

[0041] The input information storage unit 131 stores information input via the user interface 140, such as periodic inspection information including records of mechanically removing cracks and defects in the vehicle interior to smooth the surface, i.e., records of chipping, future operating conditions, various setting conditions, and the like.

[0042] The measurement information storage unit 132 sequentially stores and stores the measurement information acquired by the measurement information acquisition unit 110 .

[0043] The program storage unit 133 stores the programs installed in the damage amount management device 100. At this time, calculation data attached to the programs is also stored.

[0044] The calculation result storage unit 134 sequentially stores and stores the results of calculations performed by the calculation unit 120. As information relating to the amount of crack growth from the past to the present (past crack growth amount), crack length (past crack length), crack depth (past crack depth), and damage amount (past damage amount), the calculation result storage unit 134 stores, for example, the calculation results of the amount of crack growth from the past to the present, crack length, crack depth, and damage amount in the periodic calculation process described later with reference to Fig. 10. This information functions as past damage amount related information.

[0045] The calculation result storage unit 134 also stores calculation results such as the future crack growth amount (future crack growth amount), crack length (future crack length), crack depth (future crack depth), damage amount (future damage amount), inspection threshold, recommended inspection timing, replacement threshold, recommended replacement timing, etc. as information related to the future damage amount, which will be described later with reference to Fig. 11. This information functions as future damage amount related information.

[0046] Here, the inspection threshold refers to a predetermined value at which an inspection is recommended when the index of interest reaches that value. The recommended inspection timing refers to the time at which the recommended inspection should be performed. Specifically, in the case of the turbine rotating portion 10a, the index of interest is the amount of damage, and the inspection threshold is a predetermined amount of damage. In the case of the casing 10b, the index of interest is the period since the casing 10b began to be used, and the inspection threshold is a predetermined period (for example, 10 years) since the casing 10b began to be used. This inspection threshold also functions as information related to the amount of past damage.

[0047] The replacement threshold is a threshold for the casing 10b. The index of interest for the replacement threshold is the amount of damage, and the replacement threshold is a predetermined amount of damage. The recommended replacement time is the point in time when the amount of damage to the casing 10b reaches the replacement threshold.

[0048] The pattern-specific stress storage unit 135 stores pre-calculated stress history, temperature history, etc. for each pattern of future operating conditions input via the user interface 140. The pattern-specific stress storage unit 135 may be part of the program storage unit 133. In other words, it may be stored in the program storage unit 133 as part of the calculation data attached to the program, and this part may be called the pattern-specific stress storage unit 135.

[0049] The template storage unit 136 stores templates that serve as common parts when generating images to be displayed on the user interface 140 .

[0050] The display information storage unit 137 stores the display information generated by the display information generation unit 128 .

[0051] The user interface 140 includes a display unit that displays various information to the user (administrator) and an input device through which the user inputs various information. The display unit is, for example, a display. The display unit may also be configured with a touch panel that functions as an input device that allows direct input to the screen as well as a display screen. The input device may also be, for example, a keyboard or a mouse. The input device has an information exchange terminal with a USB port or the like that allows input of periodic inspection information, including records of crack and defect removal in the vehicle interior, various setting conditions, and the like, in a predetermined format. As mentioned above, the input function of the display unit may also be used.

[0052] The user interface 140, particularly the input section, may be different for the manager of the power plant 1 and for the manager of the manufacturer of the steam turbine 10. That is, there may be cases where the manager of the power plant 1 cannot input data, such as the input of the chipping depth of the casing 10b, which will be described later.

[0053] The progress control unit 150 controls the progress of each flow in the damage amount management method by the damage amount management device 100. The progress control unit 150 also makes a judgment for each judgment step in these flows. Specifically, the progress control unit 150 makes a judgment in the flows shown in Figs. 9 to 11, which will be described later, and instructs a part of the damage amount management device 100 that is to perform a corresponding function to perform that function in each step. A programmable logic controller, for example, may be used as the progress control unit 150.

[0054] <Input screen> Referring to Figure 3, the following describes an example of a direct input screen of the user interface 140 for chipping the casing 10b during a periodic inspection, i.e., an input screen (chip diagram) for removing cracks and defects from the casing 10b, for the high-pressure outer casing 11b. In the case of the casing 10b, if a crack or defect is found during a periodic inspection, that portion is chipped, i.e., removed. The amount removed is recorded in the periodic inspection records. For each part of the casing 10b, the periodic inspection records can be read and input on the input screen. Input is performed by the manufacturer of the steam turbine 10.

[0055] Fig. 3 is a diagram showing an example of an input screen 141 for inputting the chipping depth of the high-pressure outer casing 11b displayed on the user interface 140 of the damage amount management device 100 according to the first embodiment. Fig. 3 illustrates the case of the high-pressure outer casing 11b in the casing 10b. As described above, the input is performed by the manufacturer of the steam turbine 10, and therefore, this input screen 141 is displayed only on the manufacturer's side.

[0056] In addition, since "chipping" means removing cracks or defects on the surface of a component to make the surface smooth, it is also called "crack and defect removal."

[0057] In the input screen 141, in the portion A surrounded by a dashed line in the upper left, "Casing crack excavation depth record" is displayed as the title of the record of crack excavation depth in the vehicle compartment.

[0058] In the dashed-lined section B below the title, touching the "R" on the right will display a pull-down menu of target equipment options. Input screen 141 shows the case where "High-Pressure Outer Casing" is selected, and the selected target equipment, "HP Outer Casing," is displayed.

[0059] A diagram corresponding to the selected target equipment is displayed in the area indicated by arrow C below the display of the target equipment on input screen 141. Since "high-pressure external casing" has been selected on input screen 141, a diagram of high-pressure external casing 11b is displayed.

[0060] In part C of the input screen 141, an example of the location of the damage amount evaluation area (chipping depth input area) is displayed with a hollow circle C1. Similar circles are also displayed in the diagrams displayed for each target device, including other target devices, and these hollow circles are displayed as a set with the target device. If there are other circles in addition to circle C1, they may be displayed with a different line type or color, for example.

[0061] In the input screen 141, part E enclosed by a dashed line under the heading "Crack Evaluation Part" is a diagram of the chipping part, and is common to all chipping diagrams.

[0062] In the input screen 141, the section F on the right side is the area for inputting the chipping amount. The number and the name of the part are displayed. The chipping amount can be input in mm in the square frame shown in section G to the right of the part name.

[0063] On the input screen 141, "Back" in part H and "Upload" in part J are displayed side by side at the bottom right. Clicking "Back" in part H cancels the input contents and returns to the previous screen. Clicking "Upload" in part J uploads the input contents to the damage amount management device 100. In other words, the chipping amount data for the part stored in the input information storage unit 131 is overwritten with the chipping amount input this time.

[0064] In the input screen 141 described above, the title of section A, the explanatory diagram of the chipping section of section E, the title of section D, sections H and J are common to each chipping diagram and are stored in the template storage section 136 as common diagram data.

[0065] FIG. 4 is a diagram showing an example of an input screen 142 for inputting future operating conditions to be displayed on the user interface 140 of the damage amount management device 100 according to the first embodiment.

[0066] In part A at the top left of the input screen 142, the heading "Future operation plan setting" is displayed.

[0067] In part B below the title, the subtitle "Select Start Up Pattern" is displayed, and below that, table C for inputting "Select Start Up Pattern" is displayed.

[0068] Table C, for inputting "Start-up pattern selection," is a table for entering the number of times each startup mode will occur in each year. From top to bottom, they are "Start-up mode: Cold," "Start-up mode: Warm," and "Start-up mode: Hot." The horizontal axis is a frame for the years following the current year.

[0069] In section D below table C for inputting "Startup pattern selection", the title "Select Oparaion Pattern" is displayed.

[0070] Further below that, in section E, a subtitle "Daily Load Curve" is displayed, and below that, in the example of FIG. 4, graph F is displayed, in which curves (daily load curves) showing the temporal changes in load over three days are plotted as operation patterns. The horizontal axis of graph F is the time of day, and the vertical axis is the load ("Load [MW]"). Here, the load may be the output [MW] of the generator 20.

[0071] Below graph F, table G for inputting operation patterns is displayed. Each horizontal column of table G is a field for inputting the operation pattern, unit, and each year from the current year onwards. Each vertical row of table G is pattern 1 to 3 and the availability rate [%] for each year. The input fields for patterns 1 to 3 are the percentage [%] of days when operation of that pattern occurs relative to the number of days in a year. The availability rate [%] value is the sum of the percentages [%] of patterns 1 to 3. In this way, future operating conditions, i.e., the startup pattern and operation pattern for each year, can be set as desired.

[0072] In the upper right portion of input screen 142, a "Back" selection indicator H and a "Save" selection indicator K are displayed. When "Save" is pressed, the information entered in Table C and Table G is stored and stored in display information storage unit 137. When "Back" is pressed without pressing "Save", the display of the information entered in Table C and Table G returns to the display before input.

[0073] Here, when the selection display is expressed as "pressing," it is a general term for the action of touching on a touch screen, clicking with a cursor, or other actions that act externally on a part to identify or select that part. The same applies hereinafter.

[0074] <Crack growth evaluation> Here, the crack growth evaluation in the fixed-period calculation process will be described.

[0075] FIG. 5 is a flowchart showing the procedure of the crack growth evaluation step S100 performed by the damage amount management device 100 according to the first embodiment.

[0076] Prior to the crack growth evaluation step S100, the measurement information acquisition unit 110 acquires measurement information from the power plant control device 40 (step S22).

[0077] Here, the target locations for the crack propagation evaluation are locations selected based on the results of a previous evaluation of the turbine rotating portion 10a and the casing 10b.

[0078] The crack growth evaluation step S100 includes a state quantity / stress evaluation step S110 and a damage amount evaluation step S120.

[0079] In the state quantity / stress evaluation step S110, first, the state quantity calculation unit 121 performs an estimation calculation of the state quantity to be used in the heat transfer calculation based on the acquired measurement information (measured information) (step S111). Specifically, first, a measurement information acquisition cycle of, for example, one minute is divided into state quantity calculation intervals (stress calculation cycles) of, for example, 10 seconds. Assuming that there is a linear change between each piece of measurement information acquired in each measurement information acquisition cycle, the state quantity for each stress calculation cycle of, for example, 10 seconds is calculated by interpolation.

[0080] The state quantity calculation unit 121 calculates the steam temperature, pressure, and heat transfer coefficient of each part used in the heat transfer calculation based on the state quantity for each stress calculation cycle.

[0081] Next, the stress evaluation unit 122 performs temperature and thermal stress evaluation (step S112). In detail, the stress evaluation unit 122 first performs heat transfer calculation based on the steam temperature and heat transfer coefficient of each part obtained for each stress calculation cycle, and calculates an estimated value of the temperature of the evaluation part. Note that the shape (heat transfer area) of the evaluation part and physical property values ​​such as specific heat and thermal conductivity required for this calculation are stored in the program storage unit 133 as data accompanying the program. The stress evaluation unit 122 then calculates the thermal stress of the evaluation part based on these temperature distributions.

[0082] In parallel with step S112, the stress evaluation unit 122 evaluates stress due to pressure and centrifugal force (step S113). Specifically, it calculates the stress distribution in the turbine casing due to steam pressure. It also calculates the stress due to centrifugal force in the turbine rotating part. As a result, the stress due to pressure and centrifugal force in the evaluation area is obtained.

[0083] In the next damage amount evaluation step S120, the calculation unit 120 calculates the amount of crack growth using the calculation results from steps S112 and S113, and performs damage amount and remaining life calculations. The detailed steps are described below.

[0084] First, the stress evaluation unit 122 evaluates the stress amplitude for each evaluation location (step S121). Specifically, the stress evaluation unit 122 first calculates a total stress value, which is the sum of thermal stress and stress due to pressure and centrifugal force. The stress evaluation unit 122 then derives the stress amplitude from the change in the total stress value over a predetermined time interval, for example, using the rainflow method. Here, the predetermined time interval is the calculation period (damage amount calculation period) for the evaluation of the damage amount, etc., performed in the damage amount evaluation step S120. The damage amount calculation period is, for example, one day.

[0085] In parallel with step S121, the embrittlement calculation unit 123 performs embrittlement evaluation (step S122). Embrittlement, as a decrease in absorbed energy of a metallic material, is usually expressed by the ductile-brittle transition temperature (FATT), which is the test temperature at which the proportions of ductile fracture and brittle fracture become equal in a Charpy impact test. In the embrittlement amount evaluation by the embrittlement calculation unit 123, first, the saturated embrittlement amount ΔFATT∞ of the material of the evaluation portion is calculated based on the material data stored in the program storage unit 133 that stores the program installed for the damage amount management device 100, and the temperature of the evaluation portion calculated in step S112. Next, the embrittlement calculation unit 123 calculates the embrittlement ratio R of the material of the evaluation portion to the saturated embrittlement amount ΔFATT∞ of the embrittlement amount FATT based on the amount of impurity elements in the material of the evaluation portion according to the material data in the initial setting data, the use temperature (holding temperature) and the use time (holding time) according to the operating state. F Next, the embrittlement calculation unit 123 calculates the embrittlement amount ΔFATT as (saturated embrittlement amount ΔFATT∞×embrittlement ratio R FThe embrittlement amount ΔFATT is stored and stored in the calculation result storage unit 134. The embrittlement amount ΔFATT calculated for each damage amount calculation cycle is added to the integrated embrittlement amount ΔFATT read out from the calculation result storage unit 134, and a new integrated embrittlement amount ΔFATT is calculated and stored in the calculation result storage unit 134.

[0086] Next, the fatigue crack growth amount evaluation by the fatigue crack growth calculation unit 124 (step S123) and the creep crack growth amount evaluation by the creep crack growth calculation unit 125 (step S124) will be described, but before that, the initial crack will be described.

[0087] When evaluating the amount of crack growth, the value of the initial crack (crack length or depth), i.e., the crack value at time zero, is required as an analysis condition, and therefore a very small value is set. The initial crack value of each evaluation portion is stored in a program storage unit 133 that stores the program as data attached to the program installed for the damage amount management device 100. This attached data is stored as initial data in a calculation result storage unit 134. Furthermore, for the passenger compartment 10b, if crack / defect removal (chipping) is performed during a periodic inspection, the initial crack information stored in the input information storage unit 131 is rewritten with a value input via the user interface 140 on an input screen for the evaluation target device, as shown by the example of input screen 141 in FIG. 3.

[0088] In the fatigue crack growth amount evaluation by the fatigue crack growth calculation unit 124 (step S123) and the creep crack growth amount evaluation by the creep crack growth calculation unit 125 (step S124), the increment of the crack growth amount for each damage amount calculation cycle is calculated, and a new crack growth amount is calculated by adding the increment to the crack growth amount stored in the calculation result storage unit 134. The crack growth amount stored in the calculation result storage unit 134 is rewritten with this new crack growth amount.

[0089] First, the fatigue crack growth calculation unit 124 performs a fatigue crack growth amount evaluation based on the results of the stress amplitude evaluation in step S121 and the embrittlement evaluation in step S122 (step S123).

[0090] The fatigue crack growth calculation unit 124 calculates the fatigue crack growth rate (da / dN), reads the value of the crack length a stored in the calculation result storage unit 134, and calculates a new crack length a by adding an increment due to the fatigue crack growth rate to this value. The crack length a stored in the calculation result storage unit 134 is rewritten with this new crack length a.

[0091] The fatigue crack growth calculation unit 124 calculates the difference ΔK in the stress intensity factor for this period from the results of the stress amplitude evaluation (S121), and calculates the fatigue crack growth rate (da / dN). The fatigue crack growth calculation unit 124 calculates the coefficients of the equation for the fatigue crack growth rate (da / dN) based on the embrittlement amount ΔFATT calculated by the embrittlement calculation unit 123.

[0092] Next, the creep crack growth calculation unit 125 evaluates the amount of creep crack growth based on the thermal stress calculated in step S112, the stress calculated in step S113, and material data such as yield strength stored in the program storage unit 133 (step S124). The creep crack growth calculation unit 125 calculates the creep crack growth rate (da / dt) using, for example, an equation that depends on the stress intensity factor K and temperature. The creep crack growth calculation unit 125 calculates the coefficients of the equation for the creep crack growth rate based on the amount of embrittlement FATT calculated by the embrittlement calculation unit 123. In addition to the evaluation using the stress intensity factor K, the creep crack growth calculation unit 125 may also use, as necessary, C * , J * Alternatively, evaluation may be performed using a modified J integral.

[0093] The creep crack growth calculation unit 125 calculates the creep crack growth rate (da / dt), reads the value of the crack length a stored in the calculation result storage unit 134, and adds an increment due to the creep crack growth rate to this to calculate a new crack length a. The crack length a stored in the calculation result storage unit 134 is rewritten with this new crack length a. As a result, the crack length a calculated by the creep crack growth calculation unit 125 becomes the initial value for the calculation of the crack growth amount by the fatigue crack growth calculation unit 124 in the next step. Furthermore, if crack / defect removal (chipping) is performed on the casing 10b during a periodic inspection, the initial value immediately thereafter will be the value input via the user interface 140 on the input screen for the equipment to be evaluated, as described above.

[0094] In this way, when crack / defect removal (chipping) is performed during a periodic inspection and the information on the initial crack stored in the input information storage unit 131 is rewritten, the initial conditions for calculating the amount of crack growth in the fixed-period calculation and future prediction calculation process are changed, so the display of the display curve L1 for the fixed-period calculation on the output screen 143 is erased and replaced with the display of the new fixed-period calculation. Also, the display curve L2 for the future prediction calculation process is changed to the curve L2 after the initial conditions have been changed.

[0095] Next, the damage amount calculation unit 126 performs damage amount and remaining life calculation (step S125). The damage amount calculation unit 126 reads out the newly rewritten "crack length a" in the calculation result storage unit 134, converts the "crack length a" into a "crack depth d", and then calculates the "critical crack depth d" stored in the program storage unit 133. th The damage amount D is calculated by dividing the "crack depth d" by "

[0096] <Calculation of future damage amount> 6 is a flow diagram showing the procedure of the step of future prediction calculation (future prediction step) S200 by the future prediction unit 127 of the damage amount management device 100 according to the first embodiment. FIG. 6 shows details of the procedure of the future prediction step S200 following the future operation plan reading step S42, which will be described later with reference to FIG. 11. In the future prediction step S200, the crack growth amount is calculated based on the stress history calculated in advance for each pattern and stored in the pattern-specific stress storage unit 135. The calculated crack growth amount for each pattern is converted into a crack depth based on the integrated crack length, and the damage amount D per year, i.e., the critical crack depth d for the crack growth amount, is calculated. th Calculate the ratio to

[0097] First, the future prediction unit 127 sets m=1 and D1=D0 (step S201). Here, m indicates a year, such as 2045. D0 is the initial value for calculating the amount of damage for the first year of the future calculation (for example, the year to which the present belongs or the following year). For example, if m=1 is the year to which the present belongs, D0 is the current amount of damage, i.e., the current value calculated at regular intervals. The value of D0 is stored in the calculation result storage unit 134. The calculation result storage unit 134 also stores the latest amount of damage calculated in the following steps.

[0098] Next, the future prediction unit 127 calculates D m =D m―1 , ΔD m = 0, j = 1 (step S202). That is, the initial value of the crack length for the calculation year is set to the crack length at the end of the previous year. Here, j (j = 1 to J) is the number of the future operation pattern on the input screen 142 of FIG. 4. Each start-up mode related to the "start-up pattern" in Table C and each pattern related to the "operation pattern" in Table G are arranged by consistent number, and the total number is set to J. For example, in the case of the input screen 142 shown in FIG. 4, J is 6 (= 3 + 3).

[0099] Next, the future prediction unit 127 derives the operating time of the jth pattern (step D203). Specifically, the operating time of the jth pattern is calculated by multiplying the operating rate of the jth pattern in the mth year, which is input from the user interface 140 and stored in the input information storage unit 131, by the total time for one year.

[0100] Next, the future prediction unit 127 reads out the pre-calculated stress for each pattern from the pattern-specific stress storage unit 135 (step S204). Next, the future prediction unit 127 calculates the hourly contribution Δdj to the damage amount based on the stress of the jth pattern, and then multiplies the hourly contribution Δdj to the damage amount by the operating time of the jth pattern to obtain the incremental damage amount ΔD mj is derived (step S205).

[0101] Next, the future prediction unit 127 calculates the incremental damage amount ΔD of the jth pattern derived in step S205. mj are added sequentially to obtain the damage progression ΔD in the mth year. m (Step S206). Next, the future prediction unit 127 determines whether j has reached J (Step S207), and if j has not reached J (NO in Step S207), it adds 1 to j (Step S208) and repeats Steps S203 to S207.

[0102] If it is determined that j has reached J (YES in step S207), the future prediction unit 127 calculates the damage amount D in the (m-1)th year stored in the calculation result storage unit 134. m-1 is read out, and the incremental damage amount ΔD in the mth year calculated in step S206 is added to it. m Adding this, the new damage amount D in the mth year is m (Step S209). The calculation result storage unit 134 stores the damage amount D m is the new damage amount D m (i.e., the critical crack depth d th The ratio of the

[0103] Next, the future prediction unit 127 determines whether m has reached M (step S210), and if m has not reached M (NO in step S210), it adds 1 to m (step S211) and repeats steps S202 to S210. If m has reached M (NO in step S210), the future prediction step S200 ends. <Output screen>

[0104] Figure 7 is an output screen 143 showing an example of the results of periodic calculations and future prediction calculations for a high-pressure external compartment 11b as an example of a compartment 10b to be displayed on the user interface 140 in the damage quantity management device 100 of the first embodiment.

[0105] The top section A has the title "Remaining Life Prediction for High Temperature Steam Turbine Components."

[0106] Below that, in section B, the name of the plant in question is displayed.

[0107] The name of the target device is displayed in section C below section B. In section C, the name of the target device is displayed in a pull-down display using the check box on the right, and the selected device is displayed. In the case of output screen 143, "HP Outer Casing" is selected and displayed as the target device.

[0108] In part D below the title of part C, an overall diagram of the high-pressure turbine 11 including the target equipment selected in part C is displayed. A box D1 also indicates which part of the overall diagram the selected target equipment is in.

[0109] A diagram of the selected target equipment is displayed in section E to the right of the overall view in section D. In the example of output screen 143, a diagram of the high-pressure external compartment is displayed. In addition, the evaluation location is displayed as a hollow circle E1 in the diagram of the target equipment in section E. Although output screen 143 shows an example in which there is one evaluation location, multiple evaluation locations may be displayed. In this case, they may be identified by changing the line type or by color, etc.

[0110] The lower part of the output screen 143 displays a graph K showing the results of the periodic calculation and the future prediction calculation. The horizontal axis of the graph is the calendar year, and the year is displayed at the midpoint of the calendar year (for example, June 30th). The vertical axis is "Crack depth [%] vs. Criteria," that is, the amount of damage. Here, "criteria" means "critical crack depth d th " means.

[0111] The options "5 years", "10 years", "15 years", and "20 years" are displayed in section G above graph K. In the case of output screen 143, "5 years" has been selected, so the calendar year on the horizontal axis of graph K is shown with the solid line H1 indicating the present in the center of the horizontal axis, with the past five years displayed to the left of the solid line H1 and the future five years displayed to the right.

[0112] In graph K, dashed line H2 indicating the inspection threshold at 10 years after the start of use of the equipment, i.e., the high-pressure outer compartment, is plotted on the horizontal axis, and dashed line H3 indicating the replacement threshold is plotted on the vertical axis.

[0113] Curve L1 in graph K is a curve that shows the results of periodic calculations up to the present. Curve L2 is a curve that shows the results of future calculations. The evaluation area indicated by the curve is displayed in part H in the upper right corner of graph K. The display of curves L1 and L2 is identified (by line type, color, etc.) in a way that corresponds to part E1, which indicates the inspection object displayed in part E.

[0114] As will be described later, the future prediction calculation process for creating the future curve L2 is performed only when it is determined that a future operation plan has been input. The initial value of the pitting corrosion at this time is the final value when it is determined that a future operation plan has been input. On the other hand, the periodic calculation of the damage amount for creating the past curve L1 is performed at each damage amount calculation cycle (for example, every hour). Therefore, for example, every hour, the past curve L1 changes, and the final value of the past curve L1, i.e., the intersection point with the solid line H1, continues to increase. For this reason, the difference between the final value of the past curve L1, i.e., the intersection point with the solid line H1, and the starting point of the future curve L2, i.e., the intersection point with the solid line H1, increases every hour.

[0115] Graph K in Figure 7 shows the time when the final value of the past curve L1, i.e., the intersection with the solid line H1, and the starting point of the future curve L2, i.e., the intersection with the solid line H1, coincide, that is, within one hour after the future prediction calculation process is performed and the result is displayed as the future curve L2.

[0116] The evaluation area indicated by the curve is displayed in part H at the top right of graph K. The display of curves L1 and L2 should be identified (by line type, color, etc.) in a way that corresponds to part E1, which indicates the inspection target displayed in part E.

[0117] In the upper right portion of the output screen 143, Table M is displayed as an alarm display showing the recommended inspection and replacement times. The vertical rows of Table M are "Detail Inspection" and "Casing Replace." The horizontal columns of the table are "Recommendation" and "Remaining Period." Table M displays the time corresponding to the contents of Graph K and the remaining period based on that. Note that Table M may or may not be displayed depending on the determination results described below with reference to Figures 10 and 11.

[0118] On the output screen 143, a pull-down selection field N having a selection indicator (the "R" part) is displayed above the table M. When the selection indicator is pressed, a selection candidate screen such as a future operation plan input screen 142 or a chipping depth input screen 141 is displayed in a pull-down, and the screen to transition to can be selected.

[0119] Of the items displayed on the output screen 143, the A, B, G, and N sections are common to all the output screens.

[0120] 8 is an output screen 144 showing an example of the results of periodic calculations and future prediction calculations for the intermediate-pressure turbine rotating unit 12a, which is an example of the turbine rotating unit 10a, displayed on the user interface 140 of the damage amount management device 100 according to the first embodiment. Only the parts that differ from the output screen 143 of the high-pressure outer casing 11b will be described below.

[0121] Instead of the C section of the output screen 143, the "IP Rotor" selected in the pull-down menu is displayed in the Ca section of the output screen 144. Accordingly, an overall view of the intermediate pressure turbine 12 is displayed in the Da section, with the target equipment surrounded by D1a. Furthermore, a view Ea of the target equipment is displayed to the right of the overall view Da. In the view Ea, the evaluation areas Ea1 to Ea4 are displayed with open circles. The displays are displayed with different line types for identification, but they may also be distinguished by color, etc.

[0122] Graph K shows curves L11 and L21 through L14 and L24 that indicate the periodic calculation results and future calculation results for each of the evaluation parts Ea1 through Ea4. The Ha section also displays the names of the evaluation parts corresponding to each curve. The evaluation parts, including those displayed in the target equipment diagram Ea, are distinguished from one another using the same line type and color.

[0123] Unlike the case of the casing 10b, in the turbine rotating section 10a, only the inspection threshold is used as a threshold, and therefore a dashed line H1 indicating the level of the inspection threshold is displayed along the vertical axis of the graph K. Correspondingly, the non-destructive inspection recommendation table Ma displayed as an alarm display in the upper right corner of the output screen 144 displays the "recommended date" and "remaining period" for the "detail inspection." Note that the non-destructive inspection recommendation table Ma may or may not be displayed depending on the determination results described below with reference to FIGS. 10 and 11.

[0124] Next, each flow of the damage amount management method using the damage amount management device 100 according to the first embodiment will be described.

[0125] <Basic environment setting process> FIG. 9 is a flowchart for explaining the basic environment setting step S10 in the damage amount management method by the damage amount management device 100 according to the first embodiment.

[0126] First, a program is written into the damage amount management device 100 (step S11). The written program is stored in the program storage unit 133 of the damage amount management device 100. When the program is written, data information such as material data such as mill sheet information, various parameters for calculation, and setting values ​​is also written. The following steps are based on the premise that the damage amount management device 100 has been started up after the program has been installed.

[0127] Next, past periodic inspection information is input (step S12). The periodic inspection information is input via an information exchange terminal provided in the user interface 140. Note that an input function of the display screen of the user interface 140 may also be used.

[0128] Next, it is determined whether or not there are records relating to the turbine rotating portion 10a and the casing 10b (step S13). If it is determined that there are no records (step S13 NO), this flow is ended.

[0129] If it is determined that these records exist (YES in step S13), it is determined whether or not there is a record of crack and defect removal in the passenger compartment 10b (step S14).

[0130] If it is not determined that there is a record of crack or defect removal in the casing 10b (NO in step S14), only records related to the turbine rotating portion 10a and the casing 10b are registered (step S16).

[0131] If it is determined that there is a record of crack and defect removal (chipping) in the casing 10b (YES in step S14), first, the amount of crack and defect removal in the casing 10b is input (step S15). The input of the amount of crack and defect removal is performed on the input screen for the amount of crack and defect removal for each casing 10b shown in Figure 3. Then, records related to the turbine rotating section 10a and the casing 10b are registered (step S16).

[0132] The above is the flow of the basic environment setting step S10.

[0133] <Fixed-cycle calculation processing> FIG. 10 is a flowchart for explaining the procedure of periodic calculation processing in the damage amount management method by the damage amount management device 100 according to the first embodiment.

[0134] First, the progress control unit 150 determines whether the power plant 1 is in operation (step S21). The determination is made by using, for example, the generator output from the information stored in the measurement information storage unit 132, and determining whether this is greater than a determination value (for example, 0.1 MW) that takes noise into consideration.

[0135] If it is not determined that the power plant 1 is in operation (NO in step S21), the fixed-period calculation process is not performed and is terminated.

[0136] If it is determined that the power plant 1 is in operation (step S21: YES), the measurement information acquisition unit 110 acquires measurement information as operating data from the power plant control device 40 (step S22). As described above, the acquired measurement information (measured information) includes steam conditions such as the main steam pressure, main steam temperature, and reheat steam temperature, the rotation speed of the turbine rotating section 10a, and state quantities inside the turbine and the temperature of the casing 10b.

[0137] Next, calculation of the damage amount and the like are performed in step S100, which has been described with reference to Fig. 5. The generated calculation results are stored in the calculation result storage unit 134.

[0138] The display information generation unit 128 generates display information based on the calculation results stored in the calculation result storage unit 134 and the information stored in the template storage unit 136 (step S23). Furthermore, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information.

[0139] The user interface 140 displays the display information output from the display information generating unit 128 on the display unit as shown in FIGS. 7 and 8 (step S24).

[0140] Here, the display information generating unit 128 outputs display information based on the calculation results at each damage amount calculation period (for example, every hour) to the display information storage unit 137 and the user interface 140. Therefore, the curves from the past to the present in the graphs showing the calculation results exemplified by 143 and 144 relating to the past damage amount displayed on the display unit are updated at each damage amount calculation period.

[0141] The above-described processing from step S21 to step S24 is repeated for each damage amount calculation period, i.e., for example, every hour. Therefore, the curve of the periodic calculation result displayed in graph K illustrated in output screen 143 of Fig. 7 and output screen 144 of Fig. 8 is updated for each damage amount calculation period.

[0142] Next, the progress control unit 150 makes a determination for each of the turbine rotating unit 10a and the casing 10b, which are the objects of management, based on the damage amount calculation result obtained in step S200. These determinations are also made at each damage amount calculation period (for example, every hour).

[0143] First, the determination made by the progress control unit 150 regarding the turbine rotating unit 10a based on the damage amount calculated in step S100 will be described.

[0144] The progress control unit 150 determines whether the damage amount calculated in step S100 has reached the inspection threshold value for the turbine rotating unit 10a (step S25).

[0145] If it is not determined that the damage amount has reached the inspection threshold value for the turbine rotating portion 10a (NO in step S25), this determination is repeated for each damage amount calculation period.

[0146] If it is determined that the amount of damage has reached the inspection threshold for the turbine rotating unit 10a (YES in step S25), the progress control unit 150 outputs information relating to the date on which the amount of damage reached the inspection threshold (information relating to the recommended inspection timing) to the calculation result storage unit 134. The calculation result storage unit 134 stores this information. The display information generation unit 128 generates display information based on the calculation results stored in the calculation result storage unit 134 and the information stored in the template storage unit 136 (step S26). Furthermore, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information.

[0147] The user interface 140 displays a screen including information related to the recommended inspection timing based on the display information output from the display information generation unit 128 (step S27). Here, the information related to the recommended inspection timing on the screen is the "Detail Inspection" portion shown in Table M in the case of the output screen 143 shown in Fig. 7, and in Table Ma in the case of the output screen 144 shown in Fig. 8.

[0148] Next, the determination made by the progress control unit 150 regarding the compartment 10b based on the damage amount calculated in step S100 will be described.

[0149] First, the progress control unit 150 determines whether the inspection threshold for the compartment 10b has been reached (step S28). Here, the inspection threshold for the compartment 10b is determined after a predetermined period (e.g., 10 years) has elapsed since the compartment 10b began to be used, and therefore the determination is not based on the amount of damage. In other words, it determines whether there is an intersection between the dotted line H2 indicating the inspection threshold and the dotted line L1 indicating the amount of damage displayed on the graph K in Figure 7. This inspection threshold also functions as information related to the amount of future damage.

[0150] If it is not determined that the inspection threshold value for the passenger compartment 10b has been reached (NO in step S28), this determination is repeated for each damage amount calculation period.

[0151] If it is determined that the inspection threshold for the compartment 10b has been reached (YES in step S28), the progress control unit 150 further determines whether the damage amount calculated in step S100 has reached the replacement threshold for the compartment 10b (step S29).

[0152] If it is determined that the damage amount calculated in step S100 has not reached the replacement threshold for the passenger compartment 10b (step S29 NO), the display information generation unit 128 generates display information based on information related to the recommended inspection timing stored in the input information storage unit 131 (step S30). Furthermore, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information. The user interface 140 displays a screen including information related to the recommended inspection timing as an alarm display based on the display information output from the display information generation unit 128 (step S31). Here, the information related to the recommended inspection timing on the screen is the "Detail Inspection" portion shown in table M of the output screen 143 shown in FIG. 7 and the dashed line H2 indicating the recommended inspection timing in FIG. K.

[0153] If it is determined that the amount of damage calculated in step S100 has reached the replacement threshold for the compartment 10b (YES in step S29), the progress control unit 150 outputs information about the date on which the amount of damage reached the replacement threshold (information about the recommended inspection timing) to the calculation result storage unit 134. The calculation result storage unit 134 stores this information. The display information generation unit 128 generates display information based on the calculation results stored in the calculation result storage unit 134 and the information stored in the template storage unit 136 (step S32).

[0154] Furthermore, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information. The user interface 140 displays a screen including information related to the recommended replacement timing based on the display information output from the display information generation unit 128 (step S33). Here, the information related to the recommended replacement timing on the screen is the "Casing Replace" portion shown in Table M in the case of the output screen 143 shown in FIG. 7.

[0155] The above is the flow of the fixed-period calculation process. Next, the flow of the future prediction calculation process will be described.

[0156] <Future prediction calculation processing> FIG. 11 is a flowchart for explaining the procedure of the future prediction calculation process in the damage amount management method by the damage amount management device 100 according to the first embodiment.

[0157] Here, the future operating conditions shown in Fig. 4 are initially set on the installation date of the damage amount management device 100. After installation, the user inputs the future operating conditions on a yearly basis in Tables C and G of the input screen 142 shown in Fig. 4 in the user interface 140.

[0158] For example, by pressing the selection button in the pull-down selection field N in the example screens such as the output screen 143 shown in Fig. 7 and the output screen 144 shown in Fig. 8, selection screen items including an input screen 142 for future operating conditions are displayed from the pull-down display. When the input screen 142 is selected in the pull-down selection field N, the screen of the display unit of the user interface 140 switches to the input screen 142 for future operating conditions shown in Fig. 4. At this time, the display information generation unit 128 inputs information related to the selection of the input screen 142 from the user interface 140 and outputs display information for displaying the input screen 142 on the user interface 140.

[0159] After inputting the future operating conditions, the user presses the "Save" button on the input screen 142 in Fig. 4. The user interface 140 receives the input from the "Save" button and outputs information related to the future operating conditions to the input information storage unit 131. The input information storage unit 131 stores the information related to the future operating conditions.

[0160] The progress control unit 150 receives information from the user interface 140 in response to pressing of the "Save" button and determines that future driving conditions have been input.

[0161] In the procedure of the future prediction calculation process shown in FIG. 11, under the above-mentioned background, first, the progress control unit 150 determines whether or not future driving conditions have been input (step S41).

[0162] In the determination of step S41, if it is determined that the future driving conditions have not been input (step S41 NO), the progress control unit 150 repeats the determination of step S41.

[0163] If it is determined in step S41 that future operating conditions have been input (step S41 YES), the future prediction unit 127 reads out a program for executing future prediction calculations from the program storage unit 133 and the future operating conditions stored in the input information storage unit 131 (step S42).

[0164] Next, the future prediction unit 127 calculates the future crack growth amount, future crack length, future crack depth, and future damage amount (future damage amount, etc.) using the calculation method described with reference to Fig. 6, and outputs the calculation results to the calculation result storage unit 134 (step S200). The calculation result storage unit 134 stores the calculation results.

[0165] The display information generation unit 128 generates display information based on the calculation results stored in the calculation result storage unit 134 and the information stored in the template storage unit 136 (step S43). Furthermore, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information.

[0166] The user interface 140 displays the display information output from the display information generating unit 128 on the display unit as shown in the examples of FIGS. 7 and 8 (step S44).

[0167] Here, each time it is determined in step S41 that a future operation plan has been input (step S41 YES), the display information generation unit 128 executes the calculation process of the future damage amount, etc. in step S200, and outputs display information based on the calculation results to the display information storage unit 137 and the user interface 140. Therefore, the graph K (FIGS. 7 and 8) showing the calculation results related to the future damage amount, which is displayed on the display unit, is updated each time the calculation process of the future damage amount, etc. in step S200 is executed. In other words, the graph K showing the calculation results related to the future damage amount is updated each time information is received in response to pressing "Save" in the K section on the input screen 142 for future operation conditions.

[0168] The above-described processing from step S41 to step S44 is repeated every time it is determined that a future operation plan has been input, and therefore the curve showing the calculation result regarding the future damage amount, which is displayed on graph K illustrated in output screen 143 of Fig. 7 and output screen 144 of Fig. 8, is updated every time.

[0169] Next, the progress control unit 150 makes a determination for each of the turbine rotating unit 10a and the casing 10b based on the damage amount calculated in step S200. These determinations are also made each time future operating conditions are input.

[0170] First, the turbine rotating section 10a will be described.

[0171] The progress control unit 150 determines whether the damage amount calculated in step S200 has reached the inspection threshold value for the turbine rotating unit 10a (step S45).

[0172] If it is not determined that the damage amount has reached the inspection threshold of the turbine rotating section 10a (step S45 NO), the display information generating section 128 generates display information based on the calculation results stored in the calculation result storage section 134 and the information stored in the template storage section 136 (step S46). The details are as follows.

[0173] First, at the stage of delivery from the manufacturer of the damage amount management device 100 to the customer of the power plant 1, an initial environment setting is made within the manufacturer, and table Ma may be displayed as an alarm display on the output screen 144 of the damage amount management device 100 shown in Fig. 8. Alternatively, table Ma may already be displayed as an alarm display before the judgment in step S45 this time.

[0174] Therefore, if it is determined in this step S45 that the damage amount has not reached the inspection threshold of the turbine rotating section 10a (step S45 NO), the display information generating unit 128 generates display information without the display of table Ma as an alarm display (step S46). Similar display information is output even when a display without an alarm display has already been set, but in this case, a method may be adopted in which the same display information is not output again.

[0175] Furthermore, display information generation unit 128 outputs the generated display information to display information storage unit 137 and user interface 140. Display information storage unit 137 stores and stores the display information. User interface 140 displays a screen based on the generated information (step S47). Thereafter, step S45 and subsequent steps are repeated.

[0176] If it is determined that the damage amount has reached the inspection threshold for the turbine rotating section 10a (YES in step S45), the progress control section 150 outputs information relating to the date on which the damage amount reached the inspection threshold (information relating to the recommended inspection timing) to the calculation result storage section 134. Here, in the case of graph K on the output screen 144 illustrated in FIG. 8, the curve L24 and other curves indicating the future damage amount change linearly for each year. In other words, the curve L24 and other curves are broken lines. The information relating to the date is obtained by calculating the value on the horizontal axis at the point where the line H1 indicating the inspection threshold and the curve L24 intersect.

[0177] The calculation result storage unit 134 stores this information. The display information generation unit 128 generates display information based on the calculation results stored in the calculation result storage unit 134 and the information stored in the template storage unit 136 (step S48). Furthermore, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information.

[0178] The user interface 140 displays a screen including information related to the recommended inspection timing based on the display information output from the display information generation unit 128 (step S49). Here, the information related to the recommended inspection timing on the screen is the dotted line H indicating the inspection threshold in the table Ma and the graph K in the output screen 144 shown in FIG. 8 as an example.

[0179] Next, a flow of determination made by the progress control unit 150 based on the damage amount calculated in step S200 for the compartment 10b will be described.

[0180] First, the progress control unit 150 determines whether the inspection threshold for the compartment 10b has been reached (step S51). Here, the inspection threshold for the compartment 10b is determined after a predetermined period (e.g., 10 years) has elapsed since the compartment 10b began to be used, and therefore the determination is not based on the amount of damage. That is, similar to step S28, it determines whether there is an intersection between the dotted line H2 indicating the inspection threshold and the L1 indicating the amount of damage displayed on the graph K in FIG. 7. This inspection threshold also functions as information related to the amount of future damage.

[0181] Specifically, if it is determined that the inspection threshold value for the passenger compartment 10b has not been reached (step S51 NO), the display information generation unit 128 generates display information based on the calculation results stored in the calculation result storage unit 134 and the information stored in the template storage unit 136 (step S52). Furthermore, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information. The user interface 140 displays a screen including information related to the recommended inspection timing based on the display information output from the display information generation unit 128 (step S53).

[0182] If it is determined in step S41 that the inspection threshold value for the vehicle interior 10b has not been reached (step S51 NO), the display information generating unit 128 generates display information without displaying table M as an alarm display (step S52). Similar display information is output when a display without an alarm display has already been set, but in this case, a method may be adopted in which the same display information is not output again.

[0183] If it is determined that the inspection threshold for the compartment 10b has been reached (YES in step S51), the progress control unit 150 further determines whether the damage amount calculated in step S200 has reached the replacement threshold for the compartment 10b (step S54).

[0184] If it is determined that the damage amount calculated in step S200 has not reached the replacement threshold for the compartment 10b (step S54 NO), the progress control unit 150 causes the display information generation unit 128 to generate display information based on the information related to the recommended inspection timing stored in the input information storage unit 131 (step S55). Furthermore, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information. The user interface 140 displays a screen including information related to the recommended inspection timing based on the display information output from the display information generation unit 128 (step S56).

[0185] Here, the information on the screen relating to the recommended inspection timing is the "Detail Inspection" portion shown in table M of output screen 143 shown in FIG. 7, and the dashed line H2 indicating the recommended inspection timing in FIG.

[0186] If it is determined that the damage amount according to the calculation result of step S100 has reached the replacement threshold for the passenger compartment 10b (step S54: YES), the progress control unit 150 outputs information about the date on which the damage amount reached the replacement threshold (information about the recommended replacement timing) to the calculation result storage unit 134. The calculation result storage unit 134 stores this information. The display information generation unit 128 generates display information based on the calculation results stored in the calculation result storage unit 134 and the information stored in the template storage unit 136 (step S57).

[0187] In the case of graph K on output screen 143 shown in Fig. 7, curve L2 indicating the amount of future damage varies linearly for each year. In other words, curve L2 is a broken line. Information regarding the date is obtained by calculating the value on the horizontal axis at the point where line H1 indicating the inspection threshold intersects with curve L24.

[0188] Furthermore, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information. The user interface 140 displays a screen including information related to the recommended replacement timing based on the display information output from the display information generation unit 128 (step S58). Here, the information related to the recommended inspection timing on the screen is the "Casing Replace" portion shown in Table M in the case of the output screen 143 shown in FIG. 7, and the dotted line H3 indicating the replacement threshold in FIG. K.

[0189] As described above, the procedure of the future prediction calculation process updates the information on the future damage amount on the output screens 143 and 144 shown in Fig. 7 and Fig. 8. The information on the future damage amount on the output screens 143 and 144 changes depending on the future operating conditions. In addition, the recommended replacement timing, recommended inspection timing, and recommended replacement timing also change depending on the future operating conditions.

[0190] According to the damage amount management device 100 of the present embodiment described above, the damage amount from the past to the present predicted based on the operating data of the actual machine and the future damage amount predicted based on the assumed operating conditions can be displayed in chronological order on the display unit of the user interface 140 in graphs K on the output screens 143 and 144. This allows the user to visually confirm the change in the damage amount over time.

[0191] Furthermore, in the damage amount management device 100, it is possible to display inspection threshold and replacement threshold lines on graph K on output screen 143, which is an example of the casing 10b, and to display inspection threshold lines on graph K on output screen 144, which is an example of the turbine rotating unit 10a. This allows the user to visually confirm the recommended inspection and replacement times for the casing 10b, and the recommended inspection time for the turbine rotating unit 10a.

[0192] Furthermore, the damage amount management device 100 can display, as an alarm display, the recommended inspection timing and the recommended replacement timing in table M of the output screen 143, which is an example of the casing 10b, and the recommended inspection timing in table Ma of the output screen 144, which is an example of the turbine rotating section 10a. This allows the user to specifically recognize the recommended inspection timing and the recommended replacement timing. By specifically recognizing the recommended inspection timing, the user can appropriately make preparations such as adjusting the process and work location for the corresponding periodic inspection and securing the budget. Furthermore, with respect to the casing 10b, the user can appropriately make preparations such as manufacturing preparations for replacement, adjusting the process and work location for the periodic inspection for replacement, and securing the budget.

[0193] The damage amount management device 100 can display the calculation results of the future damage amount based on the operating conditions input on the input screen 142 for future operating conditions shown in Fig. 4. Therefore, by changing the operating conditions on the input screen 142 for future operating conditions, the user can visually confirm the difference in the future damage amount due to the operating conditions in the graph K on the output screens 143 and 144. In addition, the user can visually confirm the difference in the recommended inspection timing and recommended replacement timing due to the future operating conditions in the alarm displays such as table M on the output screen 143 and table Ma on the output screen 144.

[0194] (Second embodiment) In the second embodiment, another example of information about the future damage amount displayed on the display unit of the user interface 140 will be described.

[0195] 12 and 13 are first and second flow diagrams illustrating the future prediction calculation process in the damage amount management device 100 according to the second embodiment. Because the flow diagrams cannot be shown in a single figure due to the configuration of the drawings, the flow diagram following NO in step S41 in FIG. 12 is shown in FIG. 13. FIG. 14 is a diagram showing an example of an output screen in the damage amount management device 100 according to the second embodiment. In the second embodiment, components identical to those in the damage amount management device 100 according to the first embodiment are designated by the same reference numerals, and redundant explanations are omitted or simplified.

[0196] The second embodiment differs from the damage amount management device 100 of the first embodiment in that the output screens 143 and 144 showing the damage amount calculation results can simultaneously display calculation results for other future operating conditions. This different configuration will be mainly described here. The fixed-period calculation process for crack growth in the second embodiment is the same as the fixed-period calculation process in the first embodiment.

[0197] In the future prediction calculation process of the second embodiment shown in FIGS. 12 and 13, steps S61 to S66 are added to the future prediction calculation process of the first embodiment.

[0198] Here, after inputting the future operating conditions, the user presses the "Save" selection display K in Fig. 4. In the future prediction calculation process in the second embodiment, similar to the future prediction calculation process in the first embodiment, the user interface 140 receives input from the "Save" selection display K and outputs information related to the future operating conditions to the input information storage unit 131. The input information storage unit 131 stores information related to the future operating conditions.

[0199] Furthermore, the progress control unit 150 receives information from the user interface 140 in response to pressing of the "Save" selection indicator K, and determines that future driving conditions have been input.

[0200] As shown in FIG. 12, the progress control unit 150 determines whether or not future driving conditions have been input (step S41).

[0201] If it is determined in step S41 that the future operating conditions have been input (YES in step S41), the process goes from step S42 to step S200 and up to step S44, as described above. Then, after the process in step S44, the process in step S41 is executed again, as described above.

[0202] On the other hand, if it is determined in step S41 that no future operating conditions have been input (step S41 NO), as shown in Fig. 13, the display information generating unit 128 determines whether there is a request to display the results of calculations performed under other future operating conditions (comparison calculation results) (step S61). The comparison calculation results are calculation results that have already been predicted based on other future operating conditions and are stored in the calculation result storage unit 134. The other future operating conditions function as second future operating conditions, and the comparison calculation results function as second future damage amount related information.

[0203] Here, FIG. 15 is a diagram showing an example of a selection screen 146 for selecting the comparison calculation result to be displayed on the user interface 140 in the damage amount management device according to the second embodiment.

[0204] For example, by pressing the pull-down selection field N on the output screen 143 shown in Fig. 7, selection items such as a selection screen 146 are displayed in the pull-down selection field N, although this is not shown. Then, when the selection screen 146 is selected from the selection items in the pull-down selection field N, the screen of the display unit of the user interface 140 switches to the selection screen 146 shown in Fig. 15. At this time, the display information generation unit 128 inputs information related to the selection of the selection screen 146 from the user interface 140, and outputs display information for displaying the selection screen 146 on the user interface 140.

[0205] 15, a list of already calculated calculation results stored in the calculation result storage unit 134 is displayed in the list display unit 146a. Also shown here is an example of the list display unit 146a that also displays the date and time of storage in the calculation result storage unit 134. In the list display unit 146a, for example, the file names of five calculation results are displayed in order of most recent date and time of storage in the calculation result storage unit 134. Note that the configuration displayed in the list display unit 146a is not limited to this. It is sufficient that the list display unit 146a displays a list of already calculated calculation results.

[0206] The user selects the file name of the calculation result that the user wants to display as the comparison calculation result, for example, graph K on output screen 143 in Fig. 7, from the list displayed in list display section 146a. Then, the user presses Load button 146b on selection screen 146. When the user presses Load button 146b, the screen switches to output screen 143 showing the calculation result.

[0207] The BACK button 146d is a button that is pressed to return to the output screen 143, for example, without pressing the Load button 146b or the Reset button 146c.

[0208] The display information generating unit 128 receives a signal from the user interface 140 based on the pressing of the Load button 146b, and determines in step S61 that there is a request to display the comparison calculation result.

[0209] When it is determined in step S61 that there is a request to display the comparison calculation result (step S61: YES), the display information generation unit 128 generates display information based on the calculation result stored in the calculation result storage unit 134 and the information stored in the template storage unit 136 (step S62). Here, the display information generation unit 128 reads out both the calculation result based on the future driving conditions stored in the calculation result storage unit 134 and the selected comparison calculation result. Then, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information.

[0210] The user interface 140 displays the display information output from the display information generation unit 128 on the display unit as shown in Fig. 14 (step S63). As shown in Fig. 14, the output screen 145 displays both the calculation result based on the future operating conditions and the comparison calculation result as the future damage amount.

[0211] Specifically, the amount of damage in each calculation result is shown in chronological order as the amount of future damage. The amount of damage in the comparison calculation result is shown by the dashed line L3. Table M, which serves as an alarm display, also displays the recommended inspection and replacement times for each calculation result. As shown in Figure 14, the amount of damage in the past crack growth amount is also shown in chronological order.

[0212] The recommended inspection time in the comparison calculation result functions as a second recommended inspection time, and the recommended replacement time in the comparison calculation result functions as a second recommended replacement time.

[0213] When it is determined in step S61 that there is no request to display the comparison operation result (step S61 NO), the display information generating unit 128 determines whether there is a request to delete the display of the comparison operation result (step S64).

[0214] Here, the user can delete the comparison calculation result shown on the output screen 145 of Fig. 14 by pressing the Reset button 146c on the selection screen 146 of Fig. 15. The display information generation unit 128 receives a signal based on the pressing of the Reset button 146c from the user interface 140, and determines in step S64 that there is a request to delete the display of the comparison calculation result. When the user presses the Reset button 146c, the screen switches to a display screen showing the calculation result.

[0215] If it is determined in step S64 that there is a request to delete the display of the comparison calculation result (step S64: YES), the display information generation unit 128 generates display information based on the calculation result stored in the calculation result storage unit 134 and the information stored in the template storage unit 136 (step S65). Here, the display information generation unit 128 reads out the calculation result based on the future driving conditions stored in the calculation result storage unit 134. Then, the display information generation unit 128 outputs the generated display information to the display information storage unit 137 and the user interface 140. The display information storage unit 137 stores the display information.

[0216] The user interface 140 displays the display information output from the display information generation unit 128 on the display unit as shown in Fig. 7 (step S66). That is, as shown in Fig. 7, the comparison calculation results are deleted from the output screen 143, and only the calculation results based on the future operating conditions are displayed.

[0217] If it is determined in step S64 that there is no request to delete the display of the comparison operation result (NO in step S64), the process returns to step S41.

[0218] After the process of step S200, the progress control unit 150 determines whether the damage amount has reached the replacement threshold based on the calculation result of step S200 (steps S45 and S51), as described above. Then, the processes of steps S46 to S58 are executed, as described above.

[0219] The information on the future damage amount on the output screen 145 is updated each time information is received in response to the selection display K of "Save" on the input screen 142 for future operating conditions and the pressing of the Load button 146b or Reset button 146c on the selection screen 146 for comparison calculation results.

[0220] Although an example in which one operation result is selected as the comparison operation result has been shown here, it may be set so that a plurality of comparison operation results can be selected.

[0221] According to the damage amount management device 100 of the second embodiment described above, the same effects as those of the damage amount management device 100 of the first embodiment can be obtained.

[0222] Furthermore, according to the damage amount management device 100 of the second embodiment, it is possible to display on the output screen 145 both the calculation result predicted based on future operating conditions and the comparison calculation result as the future damage amount.

[0223] This allows the user to visually check the difference between the amount of damage in the calculation result based on future operating conditions and the amount of damage in the comparison calculation result in graph K on output screen 145. In addition, the user can visually check the difference between the recommended inspection and replacement times in the calculation result based on future operating conditions and the recommended inspection and replacement times in the comparison calculation result in table M as an alarm display on output screen 145.

[0224] According to the first embodiment described above, it is possible to provide a damage amount management device for a steam turbine that can recognize, in time series, the amount of damage from the past to the present predicted based on measured information and the amount of future damage predicted based on future operating conditions.

[0225] [Other embodiments] Although the embodiments of the present invention have been described above, they are presented as examples and are not intended to limit the scope of the invention. Furthermore, features of each embodiment may be combined. Furthermore, the embodiments may be implemented in various other forms, and various omissions, substitutions, and modifications may be made without departing from the spirit of the invention. The embodiments and their modifications are intended to be included within the scope and spirit of the invention, as well as within the scope of the invention and its equivalents as set forth in the claims. [Explanation of symbols]

[0226] 10... steam turbine, 10a... turbine rotor, 10b... casing, 11... high-pressure turbine, 11a... high-pressure turbine rotating part, 11b... high-pressure outer casing (high-pressure outer casing), 11c... high-pressure inner casing (high-pressure inner casing), 12... intermediate-pressure turbine, 12a... intermediate-pressure turbine rotating part, 12b... intermediate-pressure outer casing (intermediate-pressure outer casing), 12c... intermediate-pressure inner casing (intermediate-pressure inner casing), 13... low-pressure turbine, 14... crossover pipe, 15... exhaust pipe, 16... condenser, 17... feedwater pump, 18... feedwater pipe, 20... generator, 30... heat source device, 31... boiler, 32... reheater, 33... main steam pipe, 34... low-temperature reheat pipe, 35... high-temperature reheat pipe, 40... power plant internal control Apparatus, 100... damage amount management apparatus, 110... measurement information acquisition unit, 120... calculation unit, 121... state quantity calculation unit, 122... stress evaluation unit, 123... embrittlement calculation unit, 124... fatigue crack growth calculation unit, 125... creep crack growth calculation unit, 126... damage amount calculation unit, 127... future prediction unit, 128... display information generation unit, 130... memory unit, 131... input information memory unit, 132... measurement information memory unit, 133... program memory unit, 134... calculation result memory unit, 135... pattern-specific stress memory unit, 136... template memory unit, 137... display information memory unit, 140... user interface, 141, 142... input screen, 143, 144, 145... output screen, 146... selection screen

Claims

1. past damage amount related information indicating information on the amount of damage to a high-temperature component, such as a turbine casing or a turbine rotating part of a steam turbine, from the past to the present, calculated based on measured information; and future damage amount related information indicating information regarding a future damage amount of the high-temperature component in the future calculated based on future operating conditions input through an operation using an input display screen of a user interface and the past damage amount related information; a display information generating unit that generates display information to be displayed on the input display screen of the user interface; The future operating conditions are: the ratio of the number of days in a year to the number of days in a year for each of a plurality of operation patterns indicating a temporal change in the load of the steam turbine in a day; A damage amount management device for high-temperature parts of a steam turbine, characterized in that

2. The display information generation unit 2. The damage amount management device for high-temperature components of a steam turbine according to claim 1, wherein the display information is generated to display both the past damage amount related information and the future damage amount related information on the input display screen in chronological order.

3. The display information generation unit 2. The damage amount management device for high-temperature parts of a steam turbine according to claim 1, wherein the display information for displaying the past damage amount related information on the input display screen is generated at predetermined time intervals.

4. The display information generation unit 2. The damage amount management device for high-temperature components of a steam turbine according to claim 1, wherein the display information is generated to display the future damage amount related information on the input display screen each time the future operating conditions are input.

5. The display information generation unit:

2. The damage amount management device for high-temperature components of a steam turbine according to claim 1, wherein the display information is generated to display, on the input display screen, information related to a predetermined inspection threshold at which inspection of the turbine casing is recommended.

6. The display information generation unit:

2. The damage amount management device for high-temperature components of a steam turbine according to claim 1, wherein the display information is generated to display on the input display screen information regarding a recommended inspection timing for the turbine casing and information regarding a recommended replacement timing for the turbine casing, the information being calculated based on the future damage amount.

7. The display information generation unit:

2. The damage amount management device for high-temperature components of a steam turbine according to claim 1, wherein the display information is generated to display on the input display screen information relating to a recommended inspection timing for inspecting the turbine rotating part, the information being calculated based on the future damage amount.

8. The display information generation unit 2. The damage amount management device for a steam turbine hot component according to claim 1, wherein the display information is further displayed on the input display screen, second damage amount-related information indicating information regarding a second future damage amount of the hot component in the future calculated based on second future operating conditions and the past damage amount-related information input through an operation using the input display screen of the user interface.

9. The display information generation unit:

9. The damage amount management device for high-temperature components of a steam turbine according to claim 8, wherein the display information is generated to display on the input display screen information relating to a recommended inspection timing when an inspection of the turbine casing is recommended and a recommended replacement timing when replacement of the turbine casing is recommended, the information being calculated based on the second damage amount.

10. The display information generation unit:

9. The damage amount management device for high-temperature components of a steam turbine according to claim 8, wherein the display information is generated to display on the input display screen a recommended inspection time for the turbine rotating part, the recommended inspection time being calculated based on the second damage amount.

Images