Steam turbine temperature calculation system, method, electronic device and storage medium

Abstract

The application provides a steam turbine temperature calculation system, method, electronic equipment and storage medium, the system comprises a temperature matching calculation module and a stress calculation module, wherein the temperature matching calculation module is connected with the stress calculation module, wherein the input end of the temperature matching calculation module is used for receiving a plurality of intermediate pressure cylinder temperature difference calculation parameters and a plurality of high pressure cylinder temperature difference calculation parameters; the temperature matching calculation module is further used for calculating the intermediate pressure cylinder temperature difference according to the plurality of received intermediate pressure cylinder temperature difference calculation parameters, and calculating the high pressure cylinder temperature difference according to the plurality of received high pressure cylinder temperature difference calculation parameters; the output end of the temperature matching calculation module is connected with the stress calculation module, and the intermediate pressure cylinder temperature difference and the high pressure cylinder temperature difference are transmitted to the stress calculation module, so that the stress calculation module performs stress analysis. The system provided by the application can update and optimize various parameters according to the changes of the gas turbine field situation, and ensure the stable operation of the combined cycle unit.

Description

Technical Field

[0001] This invention relates to the field of steam turbine technology, and in particular to a steam turbine temperature calculation system, method, electronic device, and storage medium. Background Technology

[0002] With the large-scale integration of renewable energy, the resulting volatility problem has become increasingly prominent. Gas turbines and their combined cycle units are characterized by being clean, flexible, and efficient, playing a key role in grid peak shaving.

[0003] In combined cycle power units, the exhaust gas from the gas turbine heats the main steam, which then drives the steam turbine to perform work. However, during start-up and shutdown, the thermal stress generated by the temperature difference between the steam and the metal surface of the turbine cylinder is a significant cause of turbine fatigue failure in combined cycle units. Therefore, it is necessary to calculate the temperature difference between the turbine cylinder surface and the steam to guide subsequent gas turbine operation control. However, the steam temperature inside the high-pressure cylinder of the turbine cannot be directly measured; therefore, it must be calculated using existing measurement values.

[0004] In existing technologies, the calculation method for high-pressure in-cylinder steam temperature is generally encapsulated in the gas turbine control system (TCS) logic by the original gas turbine manufacturer. The calculation process cannot be obtained, which brings difficulties to the subsequent update and optimization of control logic and customized adjustments based on field conditions. At the same time, solving the problem of calculating high-pressure in-cylinder steam temperature is also an obstacle that must be overcome in the process of localization of gas turbine control technology. Summary of the Invention

[0005] This invention provides a steam turbine temperature calculation system, method, electronic device, and storage medium to solve the technical problem in the prior art where the calculation method for high-pressure cylinder steam temperature cannot be adjusted. By determining the temperature matching calculation module, the invention aims to adjust various parameters in the calculation method in real time according to the on-site conditions.

[0006] In a first aspect, the present invention provides a steam turbine temperature calculation system, the system comprising a temperature matching calculation module and a stress calculation module, wherein the temperature matching calculation module is connected to the stress calculation module, wherein...

[0007] The input terminal of the temperature matching calculation module is used to receive multiple intermediate-pressure cylinder temperature difference calculation parameters and multiple high-pressure cylinder temperature difference calculation parameters; the temperature matching calculation module is also used to calculate the intermediate-pressure cylinder temperature difference based on the received multiple intermediate-pressure cylinder temperature difference calculation parameters, and to calculate the high-pressure cylinder temperature difference based on the received multiple high-pressure cylinder temperature difference calculation parameters.

[0008] The output of the temperature matching calculation module is connected to the stress calculation module, and is used to transmit the temperature difference between the intermediate-pressure cylinder and the high-pressure cylinder to the stress calculation module for stress analysis.

[0009] Furthermore, according to the turbine temperature calculation system provided by the present invention, the temperature difference calculation parameters of the plurality of intermediate-pressure cylinders include at least the following parameters:

[0010] Reheat steam temperature, intermediate pressure cylinder inner surface metal temperature, intermediate pressure cylinder grid connection signal, and intermediate pressure cylinder timing signal;

[0011] The temperature difference calculation parameters for the multiple high-pressure cylinders include at least the following parameters:

[0012] Rated main steam pressure, high-pressure main steam pressure, high-pressure main steam temperature, metal humidity on the inner surface of the high-pressure cylinder, high-pressure cylinder grid connection signal, and high-pressure cylinder timing signal.

[0013] Furthermore, according to the turbine temperature calculation system provided by the present invention, the temperature matching calculation module includes an intermediate-pressure cylinder temperature difference calculation module and a high-pressure cylinder temperature difference calculation module, wherein the intermediate-pressure cylinder temperature difference calculation module includes a subtraction module (101) and a selection module 1 (102), wherein the subtraction module (101) is connected to the selection module 1 (102), wherein,

[0014] The positive input value of the subtraction module (101) is the reheat steam temperature, and the negative input value is the metal temperature of the inner surface of the medium-pressure cylinder. The positive input value is subtracted from the negative input value to obtain the output value, and the output value is transmitted to the selection module 1 (102).

[0015] The selection module 1 (102) includes three input ports, namely the CASC port, the Input port, and the SEL port. When the SEL port input is 0, the CASC port value is output; when the SEL port input is 1, the Input port value is output; or, when the CASC port input in module 102 is the output of the subtraction module (101), the SEL port input is the grid connection signal, and the Input port input is the parameter x1.

[0016] Furthermore, according to the turbine temperature calculation system provided by the present invention, the intermediate-pressure cylinder temperature difference calculation module further includes a selection module 1 (103), which is connected to the selection module 1 (102), wherein,

[0017] The selection module 1 (103) includes three input ports, namely the CASC port, the Input port, and the SEL port. The CASC port input is its own output, the SEL port input is a timing signal, and the Input port input is the output of the selection module 1 (102). The output of the selection module 1 (103) is the temperature difference value of the intermediate pressure cylinder.

[0018] Furthermore, according to the turbine temperature calculation system provided by the present invention, the temperature matching calculation module further includes a high-pressure cylinder temperature difference calculation module, which includes a multiplication module (201), a function module (202), a comparison module (203), a selection module 1 (204), a multiplication module (205), a subtraction module (206), a selection module 2 (209), and a selection module 1 (210), wherein,

[0019] The inputs of the multiplication module (201) are the rated main steam pressure and the high-pressure main steam pressure. The multiplication module (201) is used to multiply the rated main steam pressure and the high-pressure main steam pressure, and the output is the main steam pressure at the current moment.

[0020] The function module (202) is connected to the multiplication module (201), and the input of the function module (202) is the output of the multiplication module (201); the function module (202) is also connected to the selection module 1 (204), and the output of the function module (202) is connected to the input of the selection module 1 (204);

[0021] The comparison module (203) is connected to the selection module 1 (204) and is used to compare the high-pressure main steam pressure with the parameter x3. When the high-pressure main steam pressure is greater than the parameter x3, it outputs 1, otherwise it outputs 0. The output of the comparison module (203) is a Boolean value and is connected to the SEL input of the selection module 1 (204).

[0022] The selection module 1 (204) includes three input ports, the parameters of which are parameter x2, the output of function module 202 and the output of comparison module (203), respectively. The output of selection module 1 (204) is connected to the input port of multiplication module (205).

[0023] The multiplication module (205) is used to multiply the high-pressure main steam temperature with the correction coefficient of the output main steam temperature of the selection module 1 (204) as a function of pressure, and output the corrected high-pressure in-cylinder steam temperature, which is then connected to the subtraction module (206).

[0024] The positive input of the subtraction module (206) is the steam temperature of the high-pressure cylinder calculated by the multiplication module (205), and the negative input is the metal temperature of the inner surface of the high-pressure cylinder. The calculated difference is connected to the selection module 2 (209) as the output.

[0025] The selection module 2 (209) includes five input ports: CASC port, Input1 port, SEL1 port, Input2 port, and SEL2 port. When both SEL1 port and SEL2 port are 0, the output of the selection module 2 is the CASC port value. When the input of SEL1 port is 1, the output of the selection module 2 is the Input1 port input value. When the input value of SEL1 is 0 and the input value of SEL2 is 1, the output of the selection module 2 is the Input2 port input value.

[0026] The selection module 1 (210) is connected to the selection module 2 (209) and is used to update the output high-pressure cylinder temperature difference value according to the input.

[0027] Furthermore, according to the turbine temperature calculation system provided by the present invention, the high-pressure cylinder temperature difference calculation module further includes a subtraction module (207) and a comparison module (208), wherein the subtraction module (207) and the comparison module (208) are respectively connected to the selection module 2 (209), wherein,

[0028] The positive input of the subtraction module (207) is parameter x5, and the negative input is the metal temperature of the cylinder surface inside the high-pressure cylinder. The calculated difference is connected to the selection module 2 (209) as the output.

[0029] The input to the comparison module (208) is the metal temperature of the inner surface of the high-pressure cylinder and the parameter x6. When the metal temperature of the inner surface of the high-pressure cylinder is less than the parameter x6, the output is 1; when the metal temperature of the inner surface of the high-pressure cylinder is greater than or equal to the parameter x6, the output is 0.

[0030] The CASC port input of the selection module 2 (209) is the difference between the high-pressure cylinder steam temperature and the surface metal temperature calculated by the subtraction module (206), the Input1 port input is parameter x4, the SEL1 port input is the grid connection signal, the Input2 port input is the difference between the high-pressure cylinder inner cylinder surface metal temperature and parameter x5 calculated by the subtraction module (207), and the SEL2 port input is the output of the comparison module (208).

[0031] After the unit is connected to the grid, the output of the selection module 2 (209) is a fixed parameter x4; before the unit is connected to the grid, if the metal temperature on the surface of the high-pressure cylinder is less than the fixed parameter x6, the output of the selection module 2 (209) is the difference between the metal temperature on the surface of the high-pressure cylinder and the fixed value x5; before the unit is connected to the grid, and when the metal temperature on the surface of the high-pressure cylinder is greater than or equal to the fixed parameter x6, the output of the selection module 2 (209) is the difference between the steam temperature of the high-pressure cylinder and the metal temperature on the surface of the high-pressure cylinder calculated by the subtraction module (206); the selection module 2 (209) outputs the result to the selection module 1 (210).

[0032] Secondly, the present invention also provides a method for calculating turbine temperature based on the turbine temperature calculation system described above, comprising:

[0033] Obtain the temperature difference calculation parameters for multiple intermediate-pressure cylinders and multiple high-pressure cylinders;

[0034] The acquired temperature difference calculation parameters of multiple intermediate-pressure cylinders and multiple high-pressure cylinders are input into the temperature matching calculation module for calculation to obtain the temperature difference of the intermediate-pressure cylinder and the temperature difference of the high-pressure cylinder.

[0035] The temperature difference between the intermediate-pressure cylinder and the high-pressure cylinder is input into the stress calculation module to obtain the stress value of the steam turbine.

[0036] Furthermore, according to the turbine temperature calculation method provided by the present invention, the calculation parameters for the temperature difference of the plurality of intermediate-pressure cylinders include at least the following parameters:

[0037] Reheat steam temperature, intermediate pressure cylinder inner surface metal temperature, intermediate pressure cylinder grid connection signal, and intermediate pressure cylinder timing signal;

[0038] The temperature difference calculation parameters for the multiple high-pressure cylinders include at least the following parameters:

[0039] Rated main steam pressure, high-pressure main steam pressure, high-pressure main steam temperature, metal humidity on the inner surface of the high-pressure cylinder, high-pressure cylinder grid connection signal, and high-pressure cylinder timing signal.

[0040] Thirdly, the present invention also provides an electronic device, comprising:

[0041] Processor, memory, and bus, among which,

[0042] The processor and the memory communicate with each other via the bus;

[0043] The memory stores program instructions that can be executed by the processor, which can invoke the program instructions to perform the steps of the turbine temperature calculation method described in any of the preceding items.

[0044] Fourthly, the present invention also provides a non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the steps of the turbine temperature calculation method described above.

[0045] Fifthly, the present invention also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the turbine temperature calculation method as described in any of the preceding claims.

[0046] This invention provides a turbine temperature calculation system, method, electronic device, and storage medium. The system includes a temperature matching calculation module and a stress calculation module, wherein the temperature matching calculation module is connected to the stress calculation module. The input terminal of the temperature matching calculation module receives multiple intermediate-pressure cylinder temperature difference calculation parameters and multiple high-pressure cylinder temperature difference calculation parameters. The temperature matching calculation module is also used to calculate the intermediate-pressure cylinder temperature difference based on the received intermediate-pressure cylinder temperature difference calculation parameters and to calculate the high-pressure cylinder temperature difference based on the received high-pressure cylinder temperature difference calculation parameters. The output terminal of the temperature matching calculation module is connected to the stress calculation module to transmit the intermediate-pressure cylinder temperature difference and the high-pressure cylinder temperature difference to the stress calculation module for stress analysis. The system provided by this invention can update and optimize various parameters according to changes in the gas turbine site conditions, ensuring the stable operation of the combined cycle unit. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the structure of a steam turbine temperature calculation system provided by the present invention;

[0049] Figure 2 This is a schematic diagram of the structure of a steam turbine intermediate pressure cylinder temperature difference calculation logic provided by the present invention;

[0050] Figure 3 This is a schematic diagram of the structure of a steam turbine high-pressure cylinder temperature difference calculation logic provided by the present invention;

[0051] Figure 4 This is a schematic diagram of a main steam temperature correction system and a piecewise function curve of main steam pressure provided by the present invention;

[0052] Figure 5 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0054] Figure 1 This is a schematic diagram of the turbine temperature calculation system provided by the present invention, as shown below. Figure 1 As shown, the turbine temperature calculation system provided by the present invention includes a temperature matching calculation module 1 and a stress calculation module 2, wherein the temperature matching calculation module 1 and the stress calculation module 2 are connected.

[0055] The input terminal of the temperature matching calculation module 1 is used to receive multiple intermediate-pressure cylinder temperature difference calculation parameters and multiple high-pressure cylinder temperature difference calculation parameters; the temperature matching calculation module 1 is also used to calculate the intermediate-pressure cylinder temperature difference based on the received multiple intermediate-pressure cylinder temperature difference calculation parameters, and to calculate the high-pressure cylinder temperature difference based on the received multiple high-pressure cylinder temperature difference calculation parameters.

[0056] The output of the temperature matching calculation module 1 is connected to the stress calculation module 2, and is used to transmit the temperature difference between the intermediate pressure cylinder and the high pressure cylinder to the stress calculation module for stress analysis.

[0057] Specifically, in this embodiment, the temperature difference calculation parameters for multiple intermediate-pressure cylinders include at least the following parameters: reheat steam temperature, intermediate-pressure cylinder inner cylinder surface metal temperature, intermediate-pressure cylinder grid connection signal, and intermediate-pressure cylinder timing signal; the temperature difference calculation parameters for multiple high-pressure cylinders include at least the following parameters: rated main steam pressure, high-pressure main steam pressure, high-pressure main steam temperature, high-pressure cylinder inner cylinder surface metal humidity, high-pressure cylinder grid connection signal, and high-pressure cylinder timing signal, wherein the grid connection signal and timing signal are Boolean quantities, and the rated main steam pressure is a constant related to the unit.

[0058] In this embodiment, the obtained parameters need to be input into the temperature matching calculation module 1. Through internal logic calculation, the intermediate-pressure cylinder temperature difference and the high-pressure cylinder temperature difference are obtained. The intermediate-pressure cylinder temperature difference refers to the temperature difference between the steam temperature of the intermediate-pressure cylinder and the surface metal temperature of the inner cylinder, while the high-pressure cylinder temperature difference refers to the temperature difference between the steam temperature of the high-pressure cylinder and the surface metal temperature of the inner cylinder. The calculation results are then transmitted to the subsequent stress calculation module 2. This embodiment can reduce the thermal stress of the steam turbine during startup and extend its service life.

[0059] According to the turbine temperature calculation system provided by the present invention, the system includes a temperature matching calculation module and a stress calculation module, wherein the temperature matching calculation module is connected to the stress calculation module. The input terminal of the temperature matching calculation module is used to receive multiple intermediate-pressure cylinder temperature difference calculation parameters and multiple high-pressure cylinder temperature difference calculation parameters. The temperature matching calculation module is also used to calculate the intermediate-pressure cylinder temperature difference based on the received multiple intermediate-pressure cylinder temperature difference calculation parameters, and to calculate the high-pressure cylinder temperature difference based on the received multiple high-pressure cylinder temperature difference calculation parameters. The output terminal of the temperature matching calculation module is connected to the stress calculation module, and is used to transmit the intermediate-pressure cylinder temperature difference and the high-pressure cylinder temperature difference to the stress calculation module for stress analysis. The system provided by the present invention can update and optimize various parameters according to changes in the gas turbine site conditions, ensuring the stable operation of the combined cycle unit.

[0060] Based on any of the above embodiments, in one embodiment of the present invention, the temperature matching calculation module includes a medium-pressure cylinder temperature difference calculation module and a high-pressure cylinder temperature difference calculation module, wherein, as... Figure 2 As shown, the intermediate-pressure cylinder temperature difference calculation module includes a subtraction module (101), a selection module 1 (102), and a selection module 1 (103). The subtraction module (101) is connected to the selection module 1 (102), and the selection module 1 (102) is connected to the selection module 1 (103).

[0061] The positive input value of the subtraction module (101) is the reheat steam temperature, and the negative input value is the metal temperature of the inner surface of the medium-pressure cylinder. The positive input value is subtracted from the negative input value to obtain the output value, and the output value is transmitted to the selection module 1 (102).

[0062] The selection module 1 (102) includes three input ports, namely the CASC port, the Input port, and the SEL port. Its function is as follows: when the SEL port input is 0, the CASC port value is output; when the SEL port input is 1, the Input port value is output; or, when the CASC port input in module 102 is the output of the subtraction module (101), the SEL port input is the grid connection signal, and the Input port input is the parameter x1. It should be noted that the overall module function is as follows: the intermediate pressure cylinder temperature difference before grid connection is calculated by the subtraction module (101), and the intermediate pressure cylinder temperature difference after grid connection is a fixed value. The parameter x1 is preferably 0, and can be set according to the user's actual needs. No specific limitation is made here.

[0063] The function of the selection module 1 (103) is similar to that of the selection module 1 (102), but the input ports are different. It includes three input ports: CASC port, Input port, and SEL port. The CASC port input is its own output, the SEL port input is a timing signal, and the Input port input is the output of the selection module 1 (102). The timing signal is a rising pulse with an amplitude of 1 when the set time interval t is reached. Therefore, the overall module function is to update the output of the medium-pressure cylinder temperature difference in real time every t seconds based on the input of the Input port.

[0064] The turbine temperature calculation system provided by the present invention can accurately calculate the temperature difference of the intermediate pressure cylinder of the turbine by setting multiple modules, thereby improving the accuracy of system detection and calculation, ensuring the accuracy of stress calculation and analysis, and enabling the combined cycle unit to operate stably.

[0065] Based on any of the above embodiments, in one embodiment of the present invention, the temperature matching calculation module further includes a high-pressure cylinder temperature difference calculation module, such as... Figure 3 As shown, the high-pressure cylinder temperature difference calculation module includes a multiplication module (201), a function module (202), a comparison module (203), a selection module 1 (204), a multiplication module (205), a subtraction module (206), a subtraction module (207), a comparison module (208), a selection module 2 (209), and a selection module 1 (210). The subtraction module (207) and the comparison module (208) are respectively connected to the selection module 2 (209).

[0066] The inputs to the multiplication module (201) are the rated main steam pressure and the high-pressure main steam pressure. The rated main steam pressure is a constant related to the rated operating conditions of the unit, and the high-pressure main steam pressure is the ratio of the main steam pressure to the rated main steam pressure. The multiplication module (201) is used to multiply the rated main steam pressure and the high-pressure main steam pressure, and the output is the main steam pressure at the current moment.

[0067] The function module (202) is connected to the multiplication module (201), and the input of the function module (202) is the output of the multiplication module (201). The function module (202) is also connected to the selection module 1 (204), and the output of the function module (202) is connected to the input of the selection module 1 (204). It should be noted that the function module (202) performs the function of uniquely determining the output y based on the input parameter x. The relationship between the two can be described by the function y = f(x). The input x of the function module (202) is the output of the multiplication module (201), which is the main steam pressure. The output y represents the correction coefficient of the main steam temperature as the pressure changes. This module sets the function f(x) to be an n-segment linear function. The segment parameters of this linear function are calculated based on the actual operating data on site. The resulting curve is shown in the figure. Figure 4 As shown.

[0068] The comparison module (203) is connected to the selection module 1 (204) and is used to compare the high-pressure main steam pressure with the parameter x3. In this embodiment, the parameter x3 is set to 0. When the high-pressure main steam pressure is greater than the parameter x3, the output is 1, and otherwise the output is 0. The output of the comparison module (203) is a Boolean value and is connected to the SEL input of the selection module 1 (204).

[0069] The selection module 1 (204) includes three input ports, the parameters of which are parameter x2, the output of function module 202, and the output of comparison module (203). The output of selection module 1 (204) is connected to the input port of multiplication module (205). It should be noted that the function of this module is as follows: when the high-pressure main steam pressure is greater than parameter x3, the input of the input port is output; otherwise, a fixed parameter is output, which is the CASC pin input parameter x2.

[0070] The multiplication module (205) is used to multiply the high-pressure main steam temperature with the correction coefficient of the output main steam temperature of the selection module 1 (204) as a function of pressure, and output the corrected high-pressure in-cylinder steam temperature, which is then connected to the subtraction module (206).

[0071] The positive input of the subtraction module (206) is the steam temperature of the high-pressure cylinder calculated by the multiplication module (205), and the negative input is the metal temperature of the inner surface of the high-pressure cylinder. The difference between the two is used as the output and connected to the selection module 2 (209). The positive input of the subtraction module (207) is the parameter x5, and the negative input is the metal temperature of the inner surface of the high-pressure cylinder. The difference is used as the output and connected to the selection module 2 (209).

[0072] The input to the comparison module (208) is the metal temperature of the cylinder surface inside the high-pressure cylinder and the parameter x6. When the metal temperature of the cylinder surface inside the high-pressure cylinder is less than the parameter x6, the output is 1; when the metal temperature of the cylinder surface inside the high-pressure cylinder is greater than or equal to the parameter x6, the output is 0.

[0073] Selection module 2 (209) functions similarly to selection module 1 (103), but selection module 2 (209) has five input ports: CASC, Input1, SEL1, Input2, and SEL2. When both SEL1 and SEL2 are 0, selection module 2 outputs the CASC port value; when SEL1 input is 1, selection module 2 outputs the Input1 port input value; when SEL1 input is 0 and SEL2 input is 1, it outputs the Input2 port input value. When the CASC port input of selection module 2 (209) is the difference between the high-pressure cylinder steam and the surface metal temperature calculated by the subtraction module (206), the Input1 input is parameter x4, the SEL1 input is the grid connection signal, the Input2 input is the difference between the high-pressure cylinder inner cylinder surface metal temperature calculated by the subtraction module (207) and parameter x5, and the SEL2 input is the output of the comparison module (208). It should be noted that the selection module 1 (210) has a similar function to the selection module (103) mentioned above, and has the function of updating the output high-pressure cylinder temperature difference every t seconds based on the input.

[0074] The overall module performs the following functions: After the unit is connected to the grid, the output of the selection module 2 (209) is a fixed parameter x4; before the unit is connected to the grid, if the metal temperature on the surface of the high-pressure cylinder is less than the fixed parameter x6, the output of the selection module 2 (209) is the difference between the metal temperature on the surface of the high-pressure cylinder and the fixed value x5; before the unit is connected to the grid, and when the metal temperature on the surface of the high-pressure cylinder is greater than or equal to the fixed parameter x6, the output of the selection module 2 (209) is the difference between the steam temperature of the high-pressure cylinder and the metal temperature on the surface of the high-pressure cylinder calculated by the subtraction module (206); the selection module 2 (209) outputs the result to the selection module 1 (210).

[0075] The turbine temperature calculation system provided by the present invention can accurately calculate the temperature difference of the high-pressure cylinder of the turbine by setting multiple modules, thereby improving the accuracy of system detection and calculation, ensuring the accuracy of stress calculation and analysis, and enabling the combined cycle unit to operate stably.

[0076] Based on any of the above embodiments, the present invention also provides a method for calculating turbine temperature based on the turbine temperature calculation system described above, comprising:

[0077] Obtain the temperature difference calculation parameters for multiple intermediate-pressure cylinders and multiple high-pressure cylinders;

[0078] The acquired temperature difference calculation parameters of multiple intermediate-pressure cylinders and multiple high-pressure cylinders are input into the temperature matching calculation module for calculation to obtain the temperature difference of the intermediate-pressure cylinder and the temperature difference of the high-pressure cylinder.

[0079] The temperature difference between the intermediate-pressure cylinder and the high-pressure cylinder is input into the stress calculation module to obtain the stress value of the steam turbine.

[0080] Specifically, in this embodiment, the temperature difference calculation parameters for multiple intermediate-pressure cylinders include at least the following parameters: reheat steam temperature value, intermediate-pressure cylinder inner cylinder surface metal temperature value, intermediate-pressure cylinder grid connection signal, and intermediate-pressure cylinder timing signal; the temperature difference calculation parameters for multiple high-pressure cylinders include at least the following parameters: rated main steam pressure, high-pressure main steam pressure, high-pressure main steam temperature, high-pressure cylinder inner cylinder surface metal humidity, high-pressure cylinder grid connection signal, and high-pressure cylinder timing signal.

[0081] The turbine temperature calculation method provided by this invention improves the accuracy of temperature difference calculation. It enables the input of the turbine inner cylinder metal surface temperature and steam temperature difference obtained from the temperature matching calculation method into the subsequent stress calculation module, guiding the gas turbine operation control. Furthermore, this calculation method has been integrated into the logic of a domestically produced gas turbine control system and applied in an actual power plant unit. It supports subsequent stress calculations and updates and optimizes various parameters according to the actual conditions of the gas turbine. Using the logic method provided by this invention ensures the stable operation of combined cycle units.

[0082] Since the method described in this embodiment of the invention is based on the same principle as the system described in the above embodiments, more detailed explanations will not be repeated here.

[0083] Figure 5 This is a schematic diagram of the physical structure of the electronic device provided in the embodiments of the present invention, such as... Figure 5 As shown, the present invention provides an electronic device, including: a processor 501, a memory 502, and a bus 503;

[0084] The processor 501 and the memory 502 communicate with each other via the bus 503.

[0085] The processor 501 is used to call program instructions in the memory 502 to execute the methods provided in the above-described method embodiments, such as: the system includes a temperature matching calculation module and a stress calculation module, wherein the temperature matching calculation module is connected to the stress calculation module, wherein the input terminal of the temperature matching calculation module is used to receive multiple intermediate-pressure cylinder temperature difference calculation parameters and multiple high-pressure cylinder temperature difference calculation parameters; the temperature matching calculation module is also used to calculate the intermediate-pressure cylinder temperature difference based on the received multiple intermediate-pressure cylinder temperature difference calculation parameters, and to calculate the high-pressure cylinder temperature difference based on the received multiple high-pressure cylinder temperature difference calculation parameters; the output terminal of the temperature matching calculation module is connected to the stress calculation module, and is used to transmit the intermediate-pressure cylinder temperature difference and the high-pressure cylinder temperature difference to the stress calculation module for stress analysis.

[0086] This invention provides a non-transitory computer-readable storage medium storing computer instructions that cause the computer to execute the methods provided in the above-described method embodiments. For example, the system includes a temperature matching calculation module and a stress calculation module. The temperature matching calculation module is connected to the stress calculation module. The input terminal of the temperature matching calculation module receives multiple intermediate-pressure cylinder temperature difference calculation parameters and multiple high-pressure cylinder temperature difference calculation parameters. The temperature matching calculation module is also used to calculate the intermediate-pressure cylinder temperature difference based on the received multiple intermediate-pressure cylinder temperature difference calculation parameters and to calculate the high-pressure cylinder temperature difference based on the received multiple high-pressure cylinder temperature difference calculation parameters. The output terminal of the temperature matching calculation module is connected to the stress calculation module and transmits the intermediate-pressure cylinder temperature difference and the high-pressure cylinder temperature difference to the stress calculation module for stress analysis.

[0087] This invention also provides a computer program product, comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program including program instructions, which, when executed by a computer, enable the computer to perform the methods provided in the above embodiments. The method includes: the system comprising a temperature matching calculation module and a stress calculation module, wherein the temperature matching calculation module is connected to the stress calculation module; the input terminal of the temperature matching calculation module is used to receive multiple intermediate-pressure cylinder temperature difference calculation parameters and multiple high-pressure cylinder temperature difference calculation parameters; the temperature matching calculation module is further used to calculate the intermediate-pressure cylinder temperature difference based on the received multiple intermediate-pressure cylinder temperature difference calculation parameters, and to calculate the high-pressure cylinder temperature difference based on the received multiple high-pressure cylinder temperature difference calculation parameters; the output terminal of the temperature matching calculation module is connected to the stress calculation module, and is used to transmit the intermediate-pressure cylinder temperature difference and the high-pressure cylinder temperature difference to the stress calculation module for stress analysis.

[0088] Those skilled in the art will understand that all or part of the steps of the above method embodiments can be implemented by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it performs the steps of the above method embodiments. The aforementioned storage medium includes various media that can store program code, such as ROM, RAM, magnetic disk, or optical disk.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A steam turbine temperature calculation system, characterized in that, The system includes a temperature matching calculation module and a stress calculation module, wherein the temperature matching calculation module is connected to the stress calculation module. The input terminal of the temperature matching calculation module is used to receive multiple intermediate-pressure cylinder temperature difference calculation parameters and multiple high-pressure cylinder temperature difference calculation parameters. The multiple intermediate-pressure cylinder temperature difference calculation parameters include at least the following parameters: reheat steam temperature value, intermediate-pressure cylinder inner cylinder surface metal temperature value, intermediate-pressure cylinder grid connection signal, and intermediate-pressure cylinder timing signal; The temperature difference calculation parameters of the multiple high-pressure cylinders include at least the following parameters: rated main steam pressure, high-pressure main steam pressure, high-pressure main steam temperature, metal humidity on the inner surface of the high-pressure cylinder, high-pressure cylinder grid connection signal, and high-pressure cylinder timing signal; The temperature matching calculation module includes a medium-pressure cylinder temperature difference calculation module and a high-pressure cylinder temperature difference calculation module. The medium-pressure cylinder temperature difference calculation module includes a subtraction module (101) and a selection module 1 (102). The subtraction module (101) is connected to the selection module 1 (102). The positive input value of the subtraction module (101) is the reheat steam temperature, and the negative input value is the metal temperature of the inner cylinder surface of the medium-pressure cylinder. The positive input value is subtracted from the negative input value to obtain the output value, and the output value is transmitted to the selection module 1 (102). The selection module 1 (102) includes three input ports: a CASC port, an Input port, and a SEL port. When the SEL port input is 0, the CASC port value is output; when the SEL port input is 1, the Input port value is output; or, when the CASC port input in module 102 is the output of the subtraction module (101), the SEL port input is the grid connection signal, and the Input port input is parameter x1. The high-pressure cylinder temperature difference calculation module includes a multiplication module (201), a function module (202), a comparison module (203), a selection module 1 (204), a multiplication module (205), a subtraction module (206), a selection module 2 (209), and a selection module 1 (210), wherein... The inputs of the multiplication module (201) are the rated main steam pressure and the high-pressure main steam pressure. The multiplication module (201) is used to multiply the rated main steam pressure and the high-pressure main steam pressure, and the output is the main steam pressure at the current moment. The function module (202) is connected to the multiplication module (201), and the input of the function module (202) is the output of the multiplication module (201); the function module (202) is also connected to the selection module 1 (204), and the output of the function module (202) is connected to the input of the selection module 1 (204); The comparison module (203) is connected to the selection module 1 (204) and is used to compare the high-pressure main steam pressure with the parameter x3. When the high-pressure main steam pressure is greater than the parameter x3, it outputs 1, otherwise it outputs 0. The output of the comparison module (203) is a Boolean value and is connected to the SEL input of the selection module 1 (204). The selection module 1 (204) includes three input ports, the parameters of which are parameter x2, the output of function module 202 and the output of comparison module (203), respectively. The output of selection module 1 (204) is connected to the input port of multiplication module (205). The multiplication module (205) is used to multiply the high-pressure main steam temperature with the correction coefficient of the output main steam temperature of the selection module 1 (204) as a function of pressure, and output the corrected high-pressure in-cylinder steam temperature, which is then connected to the subtraction module (206). The positive input of the subtraction module (206) is the steam temperature of the high-pressure cylinder calculated by the multiplication module (205), and the negative input is the metal temperature of the inner surface of the high-pressure cylinder. The calculated difference is connected to the selection module 2 (209) as the output. The selection module 2 (209) includes five input ports: CASC port, Input1 port, SEL1 port, Input2 port, and SEL2 port. When both SEL1 port and SEL2 port are 0, the output of the selection module 2 is the CASC port value. When the input of SEL1 port is 1, the output of the selection module 2 is the Input1 port input value. When the input value of SEL1 is 0 and the input value of SEL2 is 1, the output of the selection module 2 is the Input2 port input value. The selection module 1 (210) is connected to the selection module 2 (209) and is used to update the output high-pressure cylinder temperature difference value according to the input. The high-pressure cylinder temperature difference calculation module further includes a subtraction module (207) and a comparison module (208), wherein the subtraction module (207) and the comparison module (208) are respectively connected to the selection module 2 (209), wherein, The positive input of the subtraction module (207) is parameter x5, and the negative input is the metal temperature of the cylinder surface inside the high-pressure cylinder. The calculated difference is connected to the selection module 2 (209) as the output. The input to the comparison module (208) is the metal temperature of the inner surface of the high-pressure cylinder and the parameter x6. When the metal temperature of the inner surface of the high-pressure cylinder is less than the parameter x6, the output is 1; when the metal temperature of the inner surface of the high-pressure cylinder is greater than or equal to the parameter x6, the output is 0. The input of the CASC port of the selection module 2 (209) is the difference between the high-pressure cylinder steam temperature and the surface metal temperature calculated by the subtraction module (206), the input of the Input1 port is parameter x4, the input of the SEL1 port is the grid connection signal, the input of the Input2 port is the difference between the high-pressure cylinder inner cylinder surface metal temperature and parameter x5 calculated by the subtraction module (207), and the input of the SEL2 port is the output of the comparison module (208). After the unit is connected to the grid, the output of the selection module 2 (209) is a fixed parameter x4; before the unit is connected to the grid, if the metal temperature on the surface of the high-pressure cylinder is less than the fixed parameter x6, the output of the selection module 2 (209) is the difference between the metal temperature on the surface of the high-pressure cylinder and the fixed value x5; before the unit is connected to the grid, and when the metal temperature on the surface of the high-pressure cylinder is greater than or equal to the fixed parameter x6, the output of the selection module 2 (209) is the difference between the steam temperature of the high-pressure cylinder and the metal temperature on the surface of the high-pressure cylinder calculated by the subtraction module (206); the selection module 2 (209) outputs the result to the selection module 1 (210). The output of the temperature matching calculation module is connected to the stress calculation module, and is used to transmit the temperature difference between the intermediate-pressure cylinder and the high-pressure cylinder to the stress calculation module for stress analysis.

2. The turbine temperature calculation system according to claim 1, characterized in that, The intermediate pressure cylinder temperature difference calculation module further includes a selection module 1 (103), which is connected to the selection module 1 (102). The selection module 1 (103) includes three input ports, namely the CASC port, the Input port and the SEL port. The CASC port input is its own output, the SEL port input is a timing signal, and the Input port input is the output of the selection module 1 (102). The output of the selection module 1 (103) is the temperature difference value of the intermediate pressure cylinder.

3. A method for calculating turbine temperature based on the turbine temperature calculation system according to any one of claims 1 to 2, characterized in that, include: Obtain the temperature difference calculation parameters for multiple intermediate-pressure cylinders and multiple high-pressure cylinders; The acquired temperature difference calculation parameters of multiple intermediate-pressure cylinders and multiple high-pressure cylinders are input into the temperature matching calculation module for calculation to obtain the temperature difference of the intermediate-pressure cylinder and the temperature difference of the high-pressure cylinder. The temperature difference between the intermediate-pressure cylinder and the high-pressure cylinder is input into the stress calculation module to obtain the stress value of the steam turbine.

4. The turbine temperature calculation method according to claim 3, characterized in that, The calculation parameters for the temperature difference of the multiple intermediate-pressure cylinders include at least the following parameters: Reheat steam temperature, intermediate pressure cylinder inner surface metal temperature, intermediate pressure cylinder grid connection signal, and intermediate pressure cylinder timing signal; The temperature difference calculation parameters for the multiple high-pressure cylinders include at least the following parameters: Rated main steam pressure, high-pressure main steam pressure, high-pressure main steam temperature, metal humidity on the inner surface of the high-pressure cylinder, high-pressure cylinder grid connection signal, and high-pressure cylinder timing signal.

5. An electronic device, characterized in that, include: Processor, memory, and bus, among which, The processor and the memory communicate with each other via the bus; The memory stores program instructions that can be executed by the processor, which can call the program instructions to perform the steps of the turbine temperature calculation method as described in any one of claims 3 to 4.

6. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium stores computer instructions that cause the computer to perform the steps of the turbine temperature calculation method as described in any one of claims 3 to 4.

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