Thermal power steam turbine output checking method and system based on data correction

Abstract

The invention provides a thermal power steam turbine output checking method and system based on data correction, and the method comprises the steps: obtaining a water vapor enthalpy value through calculation according to the measurement point data of a thermal power station steam turbine set, and obtaining an enthalpy value vector of the thermal power station steam turbine set through the water vapor enthalpy value, calculating by utilizing the enthalpy value vector and a flow vector constructed by the corresponding through-flow flow to obtain output data of the turboset; according to a preset uncertainty coefficient, the measuring point data of the thermal power station steam turbine set are adjusted by using a deviation correction technology to obtain calibration data, and a residual error between the measuring point data and the calibration data is calculated by using a preset redundancy balance equation through the calibration data; correcting output data of the turboset according to the residual error to obtain a checking result of the turboset; and completing the output checking of the thermal power steam turbine according to the checking result.

Description

Technical Field

[0001] The present application relates to the field of thermal power generation, and in particular to a method and system for verifying the output of a thermal power steam turbine based on data correction. Background Art

[0002] In thermal power generation, a steam turbine is a rotating machine that drives the impeller and rotor to rotate through steam, thereby driving the generator to generate electricity. As a key component for achieving energy conversion in a thermal power plant, the operating status and output of the steam turbine have always been the focus of operators and researchers. In actual operation, various types of measuring points are arranged near the steam turbine to monitor its operation. In daily production, operators are most concerned about the output of the steam turbine, which is most intuitively reflected in the measured value of the electric power measuring point of the generator. However, thermal power units are often equipped with multiple steam turbines, such as high-pressure cylinders, medium-pressure cylinders, and low-pressure cylinders. All steam turbines share a rotor to drive the generator to generate electricity. Therefore, the electric power measuring point can only measure the sum of the output of all steam turbines, and cannot obtain the output of a single steam turbine.

[0003] Due to the influence of factors such as ambient temperature, operating status, and unit load, the output of different steam turbines fluctuates greatly, so operators can only estimate the output of steam turbines through thermal calculations using temperature, pressure, and flow measurement points near the steam turbines. However, since the efficiency of steam turbines will also change due to factors such as steam parameters, exhaust back pressure, and equipment aging, and measurement errors will inevitably occur at these measurement points, the final sum of the turbine output calculation results will be deviated after multiple calculations, resulting in the sum of the outputs of multiple steam turbines being inconsistent with the measured electrical power. Therefore, a method is needed to verify the output of steam turbines, so as to obtain more reliable data on the output of steam turbines, and to help operators and researchers better monitor and evaluate the actual operating status of steam turbines. Summary of the invention

[0004] The purpose of this application is to provide a method and system for verifying the output of a thermal power steam turbine based on data correction, so as to realize the output verification of the thermal power steam turbine under different operating conditions, so as to obtain a more accurate turbine output. The present invention can utilize the existing thermal power plant measurement data combined with data correction technology to realize the verification of the steam turbine output. The method proposed in the present invention can provide a reference for the daily output verification of the unit through the daily operation data of the thermal power plant, and help operators and researchers better monitor and evaluate the actual operating status of the steam turbine.

[0005] To achieve the above-mentioned purpose, the thermal power turbine output verification method based on data correction provided in the present application specifically includes: calculating the water vapor enthalpy value according to the measuring point data of the thermal power plant turbine unit, obtaining the enthalpy value vector of the thermal power plant turbine unit through the water vapor enthalpy value, and calculating the output data of the turbine unit using the flow vector constructed by the enthalpy value vector and the corresponding flow rate; adjusting the measuring point data of the thermal power plant turbine unit using the deviation correction technology according to the preset uncertainty coefficient to obtain calibration data, and calculating the residual between the measuring point data and the calibration data using the preset redundant balance equation through the calibration data; correcting the output data of the turbine unit according to the residual to obtain the verification result of the turbine unit; and completing the thermal power turbine output verification according to the verification result.

[0006] In the above-mentioned thermal power turbine output verification method based on data correction, optionally, calculating the water vapor enthalpy value based on the measuring point data of the thermal power plant turbine unit includes: obtaining temperature data and pressure data based on the measuring point data of the thermal power plant turbine unit; and obtaining the water vapor enthalpy value by using heat balance calculation based on the temperature data and the pressure data.

[0007] In the above-mentioned thermal power turbine output verification method based on data correction, optionally, calculating the water vapor enthalpy value based on the measurement point data of the thermal power plant turbine unit also includes: calculating the water vapor enthalpy value of the corresponding area through an isentropic model based on the turbine efficiency of the thermal power plant turbine unit in the wet steam zone.

[0008] In the above-mentioned thermal power turbine output calibration method based on data correction, optionally, completing the thermal power turbine output calibration according to the calibration result also includes: calculating a relative correction amount according to the calibration result and the output data; obtaining an actual uncertainty coefficient of the correction amount according to the relative correction analysis, and obtaining the effectiveness of the calibration result by comparing the actual uncertainty coefficient with a preset threshold value; and adjusting the preset uncertainty coefficient according to the effectiveness.

[0009] In the above-mentioned thermal power steam turbine output verification method based on data correction, optionally, obtaining the verification result of the steam turbine unit by correcting the output data of the steam turbine unit according to the residual includes: calculating the Jacobian matrix composed of the calibration enthalpy value and the calibration data by the chain rule according to the residual to obtain the covariance matrix of the residual vector of the system equilibrium equation; correcting the system equilibrium equation by the covariance matrix to obtain the constrained optimization function, and using the constrained optimization function and Lagrange multipliers to correct the output data of the steam turbine unit to obtain the verification result of the steam turbine unit.

[0010] The present application also provides a thermal power steam turbine output verification system based on data correction, the system comprising: an output calculation module, a verification calculation module and a result generation module; the output calculation module is used to calculate the water vapor enthalpy value according to the measuring point data of the thermal power plant steam turbine unit, obtain the enthalpy value vector of the thermal power plant steam turbine unit through the water vapor enthalpy value, and calculate the output data of the steam turbine unit using the flow vector constructed by the enthalpy value vector and the corresponding flow rate; the verification calculation module is used to adjust the measuring point data of the thermal power plant steam turbine unit according to the preset uncertainty coefficient using the deviation correction technology to obtain calibration data, and calculate the residual between the measuring point data and the calibration data using the preset redundant balance equation through the calibration data; the result generation module is used to correct the output data of the steam turbine unit according to the residual to obtain the verification result of the steam turbine unit; and complete the thermal power steam turbine output verification according to the verification result.

[0011] In the above-mentioned thermal power steam turbine output verification system based on data correction, optionally, the output calculation module includes a calculation unit, and the output calculation module is used to obtain temperature data and pressure data based on the measurement point data of the thermal power plant turbine unit; and obtain the water vapor enthalpy value by using heat balance calculation based on the temperature data and the pressure data.

[0012] In the above-mentioned thermal power turbine output verification system based on data correction, optionally, the calculation unit also includes obtaining the water vapor enthalpy value of the corresponding area through an isentropic model calculation based on the turbine efficiency of the thermal power plant turbine unit in the wet steam zone.

[0013] In the above-mentioned thermal power turbine output verification system based on data correction, optionally, the system also includes a result verification module, which is used to calculate a relative correction amount based on the verification result and the output data; obtain an actual uncertainty coefficient of the correction amount based on the relative correction amount analysis, and obtain the effectiveness of the verification result by comparing the actual uncertainty coefficient with a preset threshold value; and adjust the preset uncertainty coefficient according to the effectiveness.

[0014] In the above-mentioned thermal power steam turbine output verification system based on data correction, optionally, the result generation module includes an analysis unit, and the analysis unit is used to calculate the Jacobian matrix composed of the calibration enthalpy value and the calibration data according to the residual by the chain rule to obtain the covariance matrix of the residual vector of the system equilibrium equation; the system equilibrium equation is corrected by the covariance matrix to obtain the constrained optimization function, and the output data of the steam turbine unit is corrected by using the constrained optimization function and the Lagrange multiplier to obtain the verification result of the steam turbine unit.

[0015] The present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above method when executing the computer program.

[0016] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above method.

[0017] The present application also provides a computer program product, comprising a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0018] The beneficial technical effect of this application is that data correction technology is added to the classical calculation, the data deviation caused by the measurement error is measured, and the deviation is verified by correction technology, the calculated output is unified with the electric power, and the specific output value of a single steam turbine and the characteristic parameters related to the steam turbine unit are obtained. It helps the on-site operators to achieve more accurate steam turbine monitoring and grasp the more realistic steam turbine operation status. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application, constitute a part of the present application, and do not constitute a limitation of the present application. In the drawings:

[0020] Figure 1A and Figure 1B A schematic flow chart of a method for verifying the output of a thermal power steam turbine based on data correction provided in one embodiment of the present application;

[0021] Figure 2 A schematic diagram of a process for obtaining the water vapor enthalpy value provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of a flow chart for obtaining a verification result provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of a thermal power steam turbine output verification process provided in one embodiment of the present application;

[0024] Figure 5 A schematic diagram of the structure of a thermal power steam turbine output verification system based on data correction provided in one embodiment of the present application;

[0025] Figure 6 A schematic diagram of the structure of an electronic device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0026] The following will describe the implementation methods of the present application in detail in conjunction with the accompanying drawings and embodiments, so that the implementation process of how the present application applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. It should be noted that as long as there is no conflict, the various embodiments in the present application and the various features in the embodiments can be combined with each other, and the technical solutions formed are all within the protection scope of the present application.

[0027] In addition, the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be performed in an order different from that shown here.

[0028] Please refer to Figure 1A As shown, the thermal power steam turbine output verification method based on data correction provided by the present application specifically includes:

[0029] S101 calculates the enthalpy of water vapor according to the measurement point data of the steam turbine unit of the thermal power station, obtains the enthalpy vector of the steam turbine unit of the thermal power station through the water vapor enthalpy, and calculates the output data of the steam turbine unit using the flow vector constructed by the enthalpy vector and the corresponding flow rate;

[0030] S102 uses a deviation correction technology to adjust the measurement point data of the steam turbine unit of the thermal power station according to a preset uncertainty coefficient to obtain calibration data, and calculates the residual between the measurement point data and the calibration data using a preset redundant balance equation through the calibration data;

[0031] S103 corrects the output data of the steam turbine unit according to the residual error to obtain a calibration result of the steam turbine unit;

[0032] S104 completes the thermal power steam turbine output verification according to the verification result.

[0033] Specifically, the existing classical calculation method uses the temperature, pressure, and flow measurement point data near the turbine as calculation conditions, uses the physical property parameters of water vapor to query the water vapor enthalpy value of the state point, and then uses the state points of the inlet and outlet to calculate the enthalpy drop, and combines the flow of the steam turbine to calculate the output of the steam turbine. The problem with this method is that the data directly measured by the unit is used, which will inevitably produce errors. These errors are transmitted and summed to the final output parameters during physical property query and thermal calculation, so that the final calculated output and the electric power measured on the generator side have deviations. To this end, the thermal power steam turbine output verification method based on data correction provided in this application adds data correction technology to the classical calculation, measures this part of the data deviation caused by measurement errors, and realizes the verification of this part of the deviation using correction technology, unifies the calculated output and electric power, and then obtains the specific output value of a single steam turbine and the characteristic parameters related to the steam turbine unit, helping on-site operators to achieve more accurate steam turbine monitoring and grasp a more realistic steam turbine operation status; the specific implementation process of each step can refer to Figure 1B As shown, it will be described in detail in the subsequent embodiments and will not be described in detail here.

[0034] Please refer to Figure 2 As shown, in one embodiment of the present application, the water vapor enthalpy value is calculated based on the measurement point data of the steam turbine unit of the thermal power station, including:

[0035] S201 obtains temperature data and pressure data according to the measurement point data of the steam turbine unit of the thermal power station;

[0036] S202 obtains the water vapor enthalpy value by heat balance calculation according to the temperature data and the pressure data.

[0037] The method of calculating the steam enthalpy value based on the measurement point data of the steam turbine unit of the thermal power plant further includes: calculating the steam enthalpy value of the corresponding area through an isentropic model according to the turbine efficiency of the steam turbine unit of the thermal power plant in the wet steam zone.

[0038] In actual work, the thermal power steam turbine output verification method based on data correction provided by the present application mainly performs the data collection and pre-processing work of the thermal power plant in the above step S101; specifically, the data required by the present application includes the data directly measured at the measuring point when the unit is running, and the data obtained by querying the physical property library and calculating the heat balance. Specifically, the steam flowing in the high-pressure cylinder and the medium-pressure cylinder of the steam turbine unit is in a superheated state, the first few stages of the low-pressure cylinder are superheated steam, and there will be wet steam in the last stage. Therefore, for most of the water vapor in the steam turbine, the enthalpy value of the state point can be queried only by temperature and pressure. In the present invention, the inlet and outlet and steam extraction point of the steam turbine are used as the state points for analysis. For a thermal power station steam turbine unit, the enthalpy values ​​of a total of i state points can be obtained by querying the water vapor physical property library, which is recorded as the enthalpy value vector H￠:

[0039] H￠=(h1,h2,…,h i ) (1)

[0040] The corresponding flow vector M￠ can be recorded as:

[0041] M￠=(m1,m2,…,m i ) (2)

[0042] It should be noted that there are relatively few flow measurement points in the steam turbine unit, and often only the flow at the turbine inlet can be directly obtained. For the flow of the intermediate stage of the steam turbine, due to the existence of steam extraction, it is necessary to calculate it through the operation status of the steam turbine unit combined with the flow and mass conservation. In the thermal power unit, most of the steam in the steam turbine is superheated steam, and the enthalpy value can be obtained by physical property query according to the temperature and pressure, but the tail part of the steam turbine is located in the wet steam area and cannot be directly queried. Therefore, the calculation of the enthalpy value requires the additional introduction of the turbine efficiency. The efficiency of this part of the steam turbine is calculated as h. The enthalpy value of the tail part can be calculated through the isentropic model, and combined with the previous data to obtain the complete enthalpy value vector H:

[0043] H=(h1,h2,…,h j ) (3)

[0044] The corresponding traffic vector M can be recorded as:

[0045] M=(m1,m2,…,m j ) (4)

[0046] In addition, when obtaining the thermal parameters of the steam turbine, it is still necessary to obtain the data of the generator part for verification. The parameters that need to be obtained include the generator efficiency h e 、Generator power loss Loss e 、Generator mechanical loss Loss m , generator power ELE.

[0047] Based on the above data, the steam turbine output can be calculated; the steam turbine output is measured by the enthalpy drop of the steam turbine in this group and obtained in combination with the flow rate. Therefore, the output of the steam turbine group is calculated as follows:

[0048] Shaft=e(H,M) (5)

[0049] In one embodiment of the present application, the operating parameter uncertainty and state estimation link may include the following process: In an actual power station, instruments such as temperature, pressure, and flow are marked with accuracy levels during production, and the accuracy of the measurement can be measured and obtained through query. For parameters such as enthalpy values ​​that cannot directly obtain the accuracy level, it is necessary to use existing parameters to estimate through calculation. Specifically, since such parameters are estimated from multiple measurement data, their accuracy level is lower than that of directly measured parameters. At this time, it is necessary to introduce multiple coefficients for measurement. In particular, for characteristic parameters such as turbine efficiency, they do not have uncertainty themselves, and can be determined based on actual engineering experience, for example, 10%. For general temperature, pressure, and flow measurement points, the uncertainty comes from the instrument accuracy, for example: the uncertainty s t The temperature measurement point, and the uncertainty s p The uncertainty of the enthalpy value obtained by querying the data of the pressure measuring point is s h It can be calculated by the following formula:

[0050]

[0051] Where r is the uncertainty coefficient, which can be 1 to 1.5 according to engineering experience. The above process is also applicable to the calculation of steam turbine output uncertainty, so it will not be repeated here.

[0052] Please refer to Figure 3 As shown, in one embodiment of the present application, obtaining the calibration result of the steam turbine set according to the residual corrected steam turbine set output data includes:

[0053] S301: calculating the Jacobian matrix composed of the calibration enthalpy value and the calibration data by the chain rule according to the residual to obtain the covariance matrix of the residual vector of the system equilibrium equation;

[0054] S302 corrects the system balance equation through the covariance matrix to obtain a constrained optimization function, and uses the constrained optimization function and Lagrange multipliers to correct the output data of the steam turbine unit to obtain a verification result of the steam turbine unit.

[0055] In actual work, this embodiment is mainly used for steam turbine output verification calculation; specifically, through the power station output relationship, it can be obtained that, ideally, the shaft power of the steam turbine should be equal to the electric power generated by the generator after converting the generator efficiency and the intermediate process loss. However, in actual instrument measurement, it is inevitable that the two data will conflict, so the residual R of the two data can be calculated to measure the deviation of the output:

[0056] R=Shaft×h-Loss e -Loss m (7)

[0057] If the parameters such as flow rate, temperature, pressure, and efficiency in the acquired data are regarded as known parameters, then the enthalpy value and output can be regarded as unknown parameters that need to be calculated under known conditions. The Jacobian matrix J of the redundant balance equation R with respect to the known parameter vector l is R,l To calculate the above Jacobian matrix, it is necessary to calculate the Jacobian matrix J of the unknown parameter z of the power station with respect to the known parameter l z,l , and the Jacobian matrix J of the redundant balance equation with respect to the unknown parameter z of the power station R,z The Jacobian matrix J can be calculated by the chain rule R,l for:

[0058] J R,l =J R,z J z,l (8)

[0059] Calculate the covariance matrix X of the residual vector of the system equilibrium equation R :

[0060]

[0061] If a correction c is applied to all known parameters l, the residual of the system equilibrium equation is zero. When the correction is minimized, there is the following constrained optimization problem:

[0062]

[0063] On this basis, the verification results can be generated. The Lagrange multiplier method is applied to the above optimization problem. The Lagrange multiplier variable l is introduced, and the problem can be equivalently transformed into the following form:

[0064]

[0065] When the additional constant coefficient introduced by the Lagrange multiplier method is -2, the formula can be simplified without affecting the calculation results. The correction expression obtained by solving the stationary point condition is:

[0066]

[0067] Multiply both sides of the above equation by the Jacobian matrix J R,l , the above formula can be converted into the following form:

[0068] J R,l c=X c l (13)

[0069] According to the constraints of the optimization problem The Lagrange multiplier can be solved as:

[0070]

[0071] Substituting the above equation back into equation (13), the final solution of the correction is:

[0072]

[0073] Then the corrected result of the known parameter vector l is:

[0074] l * = lc (16)

[0075] So far, the correction results of known parameters are obtained. Substituting them into (5), the corrected result of turbine output Shaft can be obtained. * .

[0076] Please refer to Figure 4 As shown, in one embodiment of the present application, completing the thermal power steam turbine output verification according to the verification result further includes:

[0077] S401 calculates a relative correction amount according to the calibration result and the output data;

[0078] S402: obtaining an actual uncertainty coefficient of the correction amount according to the relative correction amount analysis, and obtaining the validity of the calibration result by comparing the actual uncertainty coefficient with a preset threshold value;

[0079] S403: Adjust the preset uncertainty coefficient according to the effectiveness level.

[0080] In this embodiment, the calibration result is mainly checked; specifically, the first calibration result is not necessarily the final result, and the rationality of the data uncertainty setting needs to be further checked under this framework. Specifically, the relative correction amount of the corrected result needs to be calculated:

[0081]

[0082] On this basis, the judgment value r of the relative correction amount is calculated as:

[0083] r=(k-1)-cf*s Shaft(18)

[0084] Where cf is the correction factor, which ranges from [1,1.96] according to the actual unit operating status; s Shaft is the initial uncertainty of shaft power. When r￡0, the correction result is considered reasonable, that is, the uncertainty setting is reasonable, otherwise the operating parameter uncertainty and state estimation, turbine output verification calculation and verification result generation links should be re-introduced, and the uncertainty should be appropriately increased during the initial selection.

[0085] Please refer to Figure 5 As shown, the present application also provides a thermal power turbine output verification system based on data correction, the system comprising: an output calculation module, a verification calculation module and a result generation module; the output calculation module is used to calculate the water vapor enthalpy value according to the measuring point data of the thermal power plant turbine unit, obtain the enthalpy vector of the thermal power plant turbine unit through the water vapor enthalpy value, and calculate the output data of the turbine unit using the flow vector constructed by the enthalpy vector and the corresponding flow rate; the verification calculation module is used to adjust the measuring point data of the thermal power plant turbine unit according to the preset uncertainty coefficient using the deviation correction technology to obtain calibration data, and calculate the residual between the measuring point data and the calibration data using the preset redundant balance equation through the calibration data; the result generation module is used to correct the output data of the turbine unit according to the residual to obtain the verification result of the turbine unit; and complete the thermal power turbine output verification according to the verification result.

[0086] In the above embodiment, the output calculation module includes a calculation unit, and the output calculation module is used to obtain temperature data and pressure data according to the measurement point data of the steam turbine unit of the thermal power plant; and obtain the water vapor enthalpy value by using heat balance calculation according to the temperature data and the pressure data. The calculation unit also includes obtaining the water vapor enthalpy value of the corresponding area by using an isentropic model calculation according to the steam turbine efficiency of the steam turbine unit of the thermal power plant in the wet steam zone.

[0087] In one embodiment of the present application, the system further includes a result verification module, the result verification module is used to calculate a relative correction amount based on the verification result and the output data; obtain an actual uncertainty coefficient of the correction amount based on the relative correction analysis, obtain the effectiveness of the verification result by comparing the actual uncertainty coefficient with a preset threshold value; and adjust the preset uncertainty coefficient based on the effectiveness. The result generation module includes an analysis unit, the analysis unit is used to calculate the Jacobian matrix composed of the calibration enthalpy value and the calibration data based on the residual by the chain rule to obtain the covariance matrix of the residual vector of the system equilibrium equation; correct the system equilibrium equation by the covariance matrix to obtain a constrained optimization function, and use the constrained optimization function and Lagrange multipliers to correct the output data of the steam turbine unit to obtain the verification result of the steam turbine unit.

[0088] Since the principle of solving the problem by the device is similar to the thermal power steam turbine output verification method based on data correction, the implementation of the device can refer to the implementation of the thermal power steam turbine output verification method based on data correction, and the repeated parts will not be repeated.

[0089] The beneficial technical effect of this application is that data correction technology is added to the classical calculation, the data deviation caused by the measurement error is measured, and the deviation is verified by correction technology, the calculated output is unified with the electric power, and the specific output value of a single steam turbine and the characteristic parameters related to the steam turbine unit are obtained. It helps the on-site operators to achieve more accurate steam turbine monitoring and grasp the more realistic steam turbine operation status.

[0090] The present application also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above method when executing the computer program.

[0091] The present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for executing the above method.

[0092] The present application also provides a computer program product, comprising a computer program / instruction, which implements the steps of the above method when executed by a processor.

[0093] like Figure 6 As shown, the electronic device 600 may further include: a communication module 110, an input unit 120, an audio processor 130, a display 160, and a power supply 170. It is worth noting that the electronic device 600 does not necessarily have to include Figure 6 In addition, the electronic device 600 may also include Figure 6 For components not shown, reference may be made to the prior art.

[0094] like Figure 6 As shown, the central processor 100 is sometimes also referred to as a controller or an operation control, and may include a microprocessor or other processor devices and / or logic devices. The central processor 100 receives inputs and controls the operations of various components of the electronic device 600.

[0095] The memory 140 may be, for example, one or more of a cache, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory or other suitable devices. The above-mentioned information related to the failure may be stored, and a program for executing the relevant information may also be stored. The CPU 100 may execute the program stored in the memory 140 to implement information storage or processing.

[0096] The input unit 120 provides input to the CPU 100. The input unit 120 is, for example, a key or a touch input device. The power supply 170 is used to provide power to the electronic device 600. The display 160 is used to display display objects such as images and text. The display may be, for example, an LCD display, but is not limited thereto.

[0097] The memory 140 may be a solid-state memory, such as a read-only memory (ROM), a random access memory (RAM), a SIM card, etc. It may also be a memory that saves information even when the power is off, can be selectively erased, and is provided with more data, examples of which are sometimes referred to as EPROMs, etc. The memory 140 may also be some other type of device. The memory 140 includes a buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application / function storage unit 142, which is used to store application programs and function programs or processes for executing the operation of the electronic device 600 through the central processor 100.

[0098] The memory 140 may also include a data storage unit (data 143) for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit (driver 144) of the memory 140 may include various drivers for communication functions of the electronic device and / or for executing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0099] The communication module 110 is a transmitter / receiver 110 that transmits and receives signals via an antenna 111. The communication module (transmitter / receiver) 110 is coupled to the central processor 100 to provide input signals and receive output signals, which may be the same as the case of a conventional mobile communication terminal.

[0100] Based on different communication technologies, multiple communication modules 110 may be provided in the same electronic device, such as a cellular network module, a Bluetooth module and / or a wireless LAN module. The communication module (transmitter / receiver) 110 is also coupled to a speaker 131 and a microphone 132 via an audio processor 130 to provide an audio output via the speaker 131 and receive an audio input from the microphone 132, thereby realizing a common telecommunication function. The audio processor 130 may include any suitable buffer, decoder, amplifier, etc. In addition, the audio processor 130 is also coupled to the central processor 100, so that the sound can be recorded on the local machine through the microphone 132, and the sound stored on the local machine can be played through the speaker 131.

[0101] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0102] The present application is described with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, and the combination of the process and / or box in the flowchart and / or block diagram can be realized by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device for realizing the function specified in one process or multiple processes in the flowchart and / or one box or multiple boxes in the block diagram.

[0103] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0104] These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and / or one or more boxes in the block diagram.

[0105] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for verifying the output of a thermal power steam turbine based on data correction, characterized in that: The method comprises: Calculating the enthalpy of water vapor according to the measurement point data of the steam turbine unit of the thermal power station, obtaining the enthalpy vector of the steam turbine unit of the thermal power station through the water vapor enthalpy, and calculating the output data of the steam turbine unit using the flow vector constructed by the enthalpy vector and the corresponding flow rate; According to a preset uncertainty coefficient, the measurement point data of the steam turbine unit of the thermal power station is adjusted by using a deviation correction technology to obtain calibration data, and the residual between the measurement point data and the calibration data is calculated by using a preset redundant balance equation through the calibration data; Correcting the output data of the steam turbine unit according to the residual to obtain a calibration result of the steam turbine unit; The output verification of the thermal power steam turbine is completed according to the verification results.

2. The thermal power steam turbine output verification method based on data correction according to claim 1, characterized in that: The calculation of the steam enthalpy value based on the measurement point data of the steam turbine unit in the thermal power plant includes: Obtain temperature and pressure data based on the measurement point data of the steam turbine unit in the thermal power station; The water vapor enthalpy value is obtained by heat balance calculation according to the temperature data and the pressure data.

3. The thermal power steam turbine output verification method based on data correction according to claim 1, characterized in that: The calculation of the steam enthalpy value based on the measurement point data of the steam turbine unit in the thermal power plant also includes: According to the steam turbine efficiency of the steam turbine unit in the wet steam zone of the thermal power plant, the water vapor enthalpy value of the corresponding area is calculated by the isentropic model.

4. The thermal power steam turbine output verification method based on data correction according to claim 1, characterized in that: Completing the thermal power steam turbine output verification according to the verification results also includes: Calculate and obtain a relative correction amount according to the verification result and the output data; Obtaining an actual uncertainty coefficient of the correction amount according to the relative correction amount analysis, and obtaining the effectiveness of the calibration result by comparing the actual uncertainty coefficient with a preset threshold value; The preset uncertainty coefficient is adjusted according to the effectiveness level.

5. The thermal power steam turbine output verification method based on data correction according to claim 1, characterized in that: Correcting the output data of the steam turbine set according to the residual error to obtain the verification result of the steam turbine set comprises: Calculating the Jacobian matrix composed of the calibration enthalpy value and the calibration data by the chain rule according to the residual to obtain the covariance matrix of the residual vector of the system equilibrium equation; The covariance matrix is ​​used to correct the system balance equation to obtain a constrained optimization function, and the constrained optimization function and Lagrange multipliers are used to correct the output data of the steam turbine unit to obtain a verification result of the steam turbine unit.

6. A thermal power steam turbine output verification system based on data correction, characterized in that: The system comprises: an output calculation module, a verification calculation module and a result generation module; The output calculation module is used to calculate the water vapor enthalpy value according to the measurement point data of the steam turbine unit of the thermal power station, obtain the enthalpy vector of the steam turbine unit of the thermal power station through the water vapor enthalpy value, and calculate the output data of the steam turbine unit using the flow vector constructed by the enthalpy vector and the corresponding flow rate; The verification calculation module is used to adjust the measurement point data of the steam turbine unit of the thermal power station by using the deviation correction technology according to the preset uncertainty coefficient to obtain calibration data, and calculate the residual between the measurement point data and the calibration data by using the preset redundant balance equation through the calibration data; The result generation module is used to obtain the verification result of the steam turbine unit according to the residual error correction steam turbine unit output data; and complete the thermal power steam turbine output verification according to the verification result.

7. The thermal power steam turbine output verification system based on data correction according to claim 6 is characterized in that: The output calculation module includes a calculation unit, and the output calculation module is used to obtain temperature data and pressure data according to the measurement point data of the steam turbine unit of the thermal power station; and obtain the water vapor enthalpy value by using heat balance calculation according to the temperature data and the pressure data.

8. The thermal power steam turbine output verification system based on data correction according to claim 7, characterized in that: The calculation unit also includes obtaining the water vapor enthalpy value of the corresponding area through an isentropic model calculation according to the steam turbine efficiency of the steam turbine unit of the thermal power station in the wet steam area.

9. The thermal power steam turbine output verification system based on data correction according to claim 6, characterized in that: The system also includes a result verification module, which is used to calculate a relative correction amount based on the verification result and the output data; obtain an actual uncertainty coefficient of the correction amount based on the relative correction amount analysis, and obtain the effectiveness of the verification result by comparing the actual uncertainty coefficient with a preset threshold value; and adjust the preset uncertainty coefficient based on the effectiveness.

10. The thermal power steam turbine output verification system based on data correction according to claim 6, characterized in that: The result generation module includes an analysis unit, which is used to calculate the Jacobian matrix composed of the calibration enthalpy value and the calibration data according to the residual by the chain rule to obtain the covariance matrix of the residual vector of the system balance equation; correct the system balance equation by the covariance matrix to obtain the constrained optimization function, and use the constrained optimization function and Lagrange multipliers to correct the output data of the steam turbine unit to obtain the verification result of the steam turbine unit.

11. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method according to any one of claims 1 to 5 is implemented.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

13. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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