Method and device for determining steam turbine quality index, storage medium and electronic equipment

Abstract

The present disclosure provides a method, device, storage medium and electronic equipment for determining a quality index of a steam turbine. The method comprises: obtaining a plurality of target main steam pressures of the steam turbine in a target time period; determining a first integral time absolute error (ITAE) of the steam turbine in the target time period according to the plurality of target main steam pressures; obtaining a reference ITAE of the steam turbine; and determining a quality index of the steam turbine according to the first ITAE and the reference ITAE, wherein the quality index is used to represent a control effect of a control system of the steam turbine. In other words, the present disclosure determines the first ITAE according to the plurality of target main steam pressures of the steam turbine in the target time period, and determines the quality index of the steam turbine from the dynamic process and the static process by combining the first ITAE and the reference ITAE, so that the accuracy of the determined quality index of the steam turbine is higher.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of steam turbine control, and particularly relates to a method and device for determining a quality index of a steam turbine, a storage medium and an electronic device. BACKGROUND

[0002] In a thermal power plant, the three main devices are a boiler, a steam turbine and a generator. The steam turbine is a prime mover for driving the generator to rotate and generate electricity. With the change of external power load, the power generation of the generator needs to be balanced with the external load. In the process of coordinating power generation, the steam pressure of the boiler and the power of the generator need to be coordinated and controlled by the steam turbine. The quality of the steam turbine directly affects the operation effect of the generator. Therefore, how to determine the quality index of the steam turbine becomes a problem to be solved. SUMMARY

[0003] To solve the above problems, the present disclosure provides a method and device for determining a quality index of a steam turbine, a storage medium and an electronic device.

[0004] In a first aspect, the present disclosure provides a method for determining a quality index of a steam turbine, comprising:

[0005] obtaining a plurality of target main steam pressures of the steam turbine in a target time period;

[0006] determining a first integral time absolute error (ITAE) of the steam turbine in the target time period according to the plurality of target main steam pressures;

[0007] obtaining a reference ITAE of the steam turbine;

[0008] determining a quality index of the steam turbine according to the first ITAE and the reference ITAE, wherein the quality index is used to represent a control effect of a control system of the steam turbine.

[0009] Optionally, the target time period is a time period in which the main steam pressure of the steam turbine is at a first peak.

[0010] Optionally, the determining the first ITAE of the steam turbine in the target time period according to the plurality of target main steam pressures comprises:

[0011] obtaining a plurality of steady-state absolute errors in a historical time period, wherein the historical time period comprises a time period from when the steam turbine starts to work to a current time, and the steady-state absolute error is an absolute error when the main steam pressure of the steam turbine is in a steady state;

[0012] determining a dynamic error in the target time period according to a preset main steam pressure, a preset weight coefficient and the plurality of target main steam pressures;

[0013] determine a first ITAE of the steam turbine in the target time period according to the absolute error and the dynamic error.

[0014] Optionally, the obtaining the reference ITAE of the steam turbine comprises:

[0015] obtaining a reference decay rate;

[0016] obtaining a second ITAE of the steam turbine in the target time period in a case that the steam turbine operates according to the reference decay rate;

[0017] taking the second ITAE as the reference ITAE.

[0018] Optionally, the obtaining the reference decay rate comprises:

[0019] obtaining a first main steam pressure dynamic deviation and a second main steam pressure dynamic deviation of the steam turbine in a case that the steam turbine operates according to a preset change rate;

[0020] determining the reference decay rate according to the first main steam pressure dynamic deviation and the second main steam pressure dynamic deviation.

[0021] Optionally, the determining the quality index of the steam turbine according to the first ITAE and the reference ITAE comprises:

[0022] normalizing the first ITAE and the reference ITAE to obtain the quality index of the steam turbine.

[0023] Optionally, the quality index of the steam turbine further comprises:

[0024] in a case that the quality index is lower than a historical quality index, outputting parameter adjustment information, the parameter adjustment information being used to prompt a user to adjust a control parameter of the steam turbine.

[0025] In a second aspect, the present disclosure provides a device for determining a quality index of a steam turbine, comprising:

[0026] a first obtaining module, configured to obtain a plurality of target main steam pressures of the steam turbine in a target time period;

[0027] a first determining module, configured to determine a first ITAE of the steam turbine in the target time period according to the plurality of target main steam pressures;

[0028] a second obtaining module, configured to obtain a reference ITAE of the steam turbine;

[0029] The second determining module is configured to determine a quality index of the steam turbine according to the first ITAE and the reference ITAE, the quality index being used to represent a control effect of a control system of the steam turbine.

[0030] Optionally, the first determining module is further configured to:

[0031] acquire a plurality of steady-state absolute errors in a historical time period, the historical time period including a time period from when the steam turbine starts to work to a current time, the steady-state absolute error being an absolute error when a main steam pressure of the steam turbine is in a steady state;

[0032] determine a dynamic error in the target time period according to a preset main steam pressure, a preset weight coefficient, and the plurality of target main steam pressures;

[0033] determine a first ITAE of the steam turbine in the target time period according to the absolute error and the dynamic error.

[0034] Optionally, the second acquiring module is further configured to:

[0035] acquire a reference decay rate;

[0036] acquire a second ITAE of the steam turbine in the target time period in a case where the steam turbine operates according to the reference decay rate;

[0037] set the second ITAE as the reference ITAE.

[0038] Optionally, the second determining module is further configured to:

[0039] perform normalization processing on the first ITAE and the reference ITAE to obtain the quality index of the steam turbine.

[0040] In a third aspect, the present disclosure provides a non-transitory computer-readable storage medium having a computer program stored thereon, the program being executed by a processor to implement steps of the method for determining the quality index of the steam turbine according to the first aspect of the present disclosure.

[0041] In a fourth aspect, the present disclosure provides an electronic device, comprising:

[0042] a memory having a computer program stored thereon;

[0043] a processor configured to execute the computer program in the memory to implement steps of the method for determining the quality index of the steam turbine according to the first aspect of the present disclosure.

[0044] By means of the technical solutions, the embodiment of the present disclosure can include the following beneficial effects: a plurality of target main steam pressures of a steam turbine in a target time period are acquired; a first ITAE of the steam turbine in the target time period is determined according to the plurality of target main steam pressures; a reference ITAE of the steam turbine is acquired; and a quality index of the steam turbine is determined according to the first ITAE and the reference ITAE, the quality index being used to represent a control effect of a control system of the steam turbine. That is, the present disclosure determines a first ITAE according to a plurality of target main steam pressures of a steam turbine in a target time period, and determines a quality index of the steam turbine from dynamic and static processes in combination with the first ITAE and a reference ITAE, so that the accuracy of the determined quality index of the steam turbine is higher.

[0045] Other features and advantages of the present disclosure will be described in detail in the following detailed description section. BRIEF DESCRIPTION OF DRAWINGS

[0046] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation of the present disclosure. In the drawings:

[0047] Figure 1 is a flow chart of a method for determining a quality index of a steam turbine according to an exemplary embodiment of the present disclosure;

[0048] Figure 2 is a schematic diagram of a target time period according to an exemplary embodiment of the present disclosure;

[0049] Figure 3 is a flow chart of another method for determining a quality index of a steam turbine according to an exemplary embodiment of the present disclosure;

[0050] Figure 4 is a main steam pressure curve diagram of a steam turbine according to an exemplary embodiment of the present disclosure;

[0051] Figure 5 is a flow chart of another method for determining a quality index of a steam turbine according to an exemplary embodiment of the present disclosure;

[0052] Figure 6 is a block diagram of an apparatus for determining a quality index of a steam turbine according to an exemplary embodiment of the present disclosure;

[0053] Figure 7 is a block diagram of another apparatus for determining a quality index of a steam turbine according to an exemplary embodiment of the present disclosure;

[0054] Figure 8 is a block diagram of an electronic device according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0055] The specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are intended to explain and illustrate the present disclosure, but not to limit the present disclosure.

[0056] The present disclosure will be described below in conjunction with specific embodiments.

[0057] Figure 1 is a flow chart of a method for determining a quality index of a steam turbine according to an exemplary embodiment of the present disclosure, as shown in Figure 1 The method can include the following steps.

[0058] S101, obtaining a plurality of target main steam pressures of the steam turbine in a target time period.

[0059] The target time period is the first peak interval after the steam turbine starts to work. For example, after the steam turbine starts to work, the real-time main steam pressure of the steam turbine starts to change. When the real-time main steam pressure reaches a preset main steam pressure value for the first time, it indicates that the steam turbine enters the first peak interval. The time point when the real-time main steam pressure reaches the preset main steam pressure value for the first time can be taken as the starting time of the target time period. After that, the real-time main steam pressure of the steam turbine continues to rise and then slowly decreases after reaching the peak value of the main steam pressure. The time point when the real-time main steam pressure decreases to the preset main steam pressure value can be taken as the end time of the target time period. The time period between the starting time and the end time is the target time period. The preset main steam pressure value can be obtained by pre-test according to the test.

[0060] Figure 2 is a schematic diagram of a target time period according to an exemplary embodiment of the present disclosure, as shown in Figure 2 The horizontal axis represents time, and the vertical axis represents the main steam pressure of the steam turbine. At t0, the main steam pressure of the steam turbine reaches the preset main steam pressure value of the steam turbine for the first time. At t1, the main steam pressure of the steam turbine rises to the peak value of the main steam pressure of the steam turbine for the first time. After that, the main steam pressure of the steam turbine starts to decrease. At t3, the main steam pressure of the steam turbine decreases to the preset main steam pressure value of the steam turbine. The time period between t0 and t3 is the target time period.

[0061] In this step, after the steam turbine starts to work, the real-time main steam pressure can be collected periodically through the steam turbine main steam pressure sensor, and during the collection of the real-time main steam pressure, it is determined according to the preset main steam pressure value whether the current time is in the target time period. If it is determined that the current time is in the target time period, the collected real-time main steam pressure is taken as the target main steam pressure, and the target main steam pressure is stored. The collection period of the real-time main steam pressure can be determined according to the communication protocol supported by the steam turbine control system and the sampling frequency of the control system. For example, the collection period can be 1s or 5s, which is not limited in the present disclosure.

[0062] In this step, after the steam turbine starts to work, the real-time main steam pressure can be collected periodically through the steam turbine main steam pressure sensor, and during the collection of the real-time main steam pressure, it is determined according to the preset main steam pressure value whether the current time is in the target time period. If it is determined that the current time is in the target time period, the collected real-time main steam pressure is taken as the target main steam pressure, and the target main steam pressure is stored. The collection period of the real-time main steam pressure can be determined according to the communication protocol supported by the steam turbine control system and the sampling frequency of the control system. For example, the collection period can be 1s or 5s, which is not limited in the present disclosure.

[0063] In this step, after the steam turbine starts to work, the real-time main steam pressure can be collected periodically through the steam turbine main steam pressure sensor, and during the collection of the real-time main steam pressure, it is determined according to the preset main steam pressure value whether the current time is in the target time period. If it is determined that the current time is in the target time period, the collected real-time main steam pressure is taken as the target main steam pressure, and the target main steam pressure is stored. The collection period of the real-time main steam pressure can be determined according to the communication protocol supported by the steam turbine control system and the sampling frequency of the control system. For example, the collection period can be 1s or 5s, which is not limited in the present disclosure.

[0064] In this step, before the steam turbine starts to work, the main steam pressure of the steam turbine when the main steam pressure is in a stable state can be set by an instruction of a unit self-starting and stopping control part, manually input by an operator, or issued by a CCS (Coordination Control System), which is not limited in the present disclosure according to the running state of the steam turbine or the control mode in which the steam turbine is located.

[0065] In this step, the reference ITAE of the steam turbine can be the first ITAE when the steam turbine runs at a reference decay rate. The reference decay rate is the decay rate of the steam turbine under ideal running conditions, which can be obtained by pre-testing according to experiments.

[0066] In this step, the reference ITAE of the steam turbine can be the first ITAE when the steam turbine runs at a reference decay rate. The reference decay rate is the decay rate of the steam turbine under ideal running conditions, which can be obtained by pre-testing according to experiments.

[0067] It should be noted that the execution order of steps S102 and S103 is not limited in the present disclosure.

[0068] S104, determining a quality index of the steam turbine according to the first ITAE and the reference ITAE.

[0069] In this step, after the first ITAE and the reference ITAE are determined, the first ITAE and the reference ITAE can be normalized to obtain the quality index of the steam turbine. For example, the ratio of the first ITAE to the reference ITAE can be determined first, which can represent the quality index of the steam turbine. The ratio is taken as the negative index of a natural constant, and after operation, the ratio can be projected to the interval [0, 1]. In this way, a dimensionless quantity can be used to represent the quality index of the steam turbine, which can be represented by Q. The smaller the first ITAE, the closer Q is to 1, indicating that the control effect of the steam turbine is better. The larger the first ITAE, the closer Q is to 0, indicating that the control effect of the steam turbine is worse.

[0070] In a possible implementation, in a case where the quality index is lower than the historical quality index, parameter adjustment information can be output, which can be used to prompt a user to adjust the control parameter of the steam turbine.

[0071] For example, if the quality index is lower than the historical quality index, the parameter adjustment information is output. After receiving the parameter adjustment information, the user can adjust the control parameter of the steam turbine, for example, the PID (Proportion-Integral-Derivative) parameter can be adjusted. PID is the three basic regulation rules of the regulator. Figure 1 As shown in the embodiment, the quality index of the steam turbine is determined. If the quality index is still less than the historical quality index, the control parameter of the steam turbine can be continuously adjusted. If the quality index is greater than the historical quality index, it indicates that the control quality of the steam turbine is better, and the steam turbine can be controlled to operate according to the control parameter.

[0072] By using the above method, the first ITAE is determined according to the plurality of target main steam pressures of the steam turbine in the target time period, and the quality index of the steam turbine is determined from the dynamic process and the static process in combination with the first ITAE and the reference ITAE, so that the accuracy of the determined quality index of the steam turbine is higher.

[0073] Figure 3 is a flowchart of another method for determining the quality index of the steam turbine according to an example embodiment of the present disclosure, as shown in Figure 3 The implementation of step S102 can include the following steps:

[0074] S1021, obtaining a plurality of steady-state absolute errors in a historical time period.

[0075] The historical time period can include a time period between a time when the steam turbine starts to work and a current time, and the steady-state absolute error is an absolute error when the main steam pressure of the steam turbine is in a steady state. For example, the time when the steam turbine starts to work can be represented by "0", and the current time can be represented by "∞"; when the main steam pressure of the steam turbine does not change within a preset time period, it is indicated that the main steam pressure of the steam turbine is in a steady state, and in this case, the main steam pressure of the steam turbine can be collected.

[0076] In this step, when it is determined that the main steam pressure of the steam turbine is in a steady state, the real-time main steam pressure of the steam turbine can be periodically collected by a main steam pressure sensor of the steam turbine, which can be arranged before a main steam valve of the steam turbine or on a steam pipeline before the main steam valve, wherein a collection period of the real-time main steam pressure can be determined according to a communication protocol supported by a steam turbine control system and a sampling frequency of the control system. For example, the collection period can be 1 s or 5 s, which is not limited in the present disclosure. According to the real-time main steam pressure of the steam turbine and a preset main steam pressure, an absolute error when the main steam pressure of the steam turbine is in a steady state can be determined, and after the absolute error is determined, the absolute error and time can be integrated, and the integration is taken as a steady-state absolute error integration.

[0077] For example, the steady-state absolute error integration can be calculated by the following formula:

[0078]

[0079] Wherein, F0 is a steady-state absolute error integration value, t is time, and |e(t)| is a steady-state absolute error.

[0080] S1022, according to the preset main steam pressure, the preset weight coefficient and the plurality of target main steam pressures, determining a dynamic error in the target time period.

[0081] The preset main steam pressure value can be a preset main steam pressure set according to an instruction of a self-starting and stopping control part of the steam turbine unit, and the preset weight coefficient represents an adjustment parameter, which can be determined according to the engineering needs of the steam turbine. For example, the preset weight coefficient can be 1.

[0082] In this step, the dynamic error integration can be calculated by the following formula:

[0083]

[0084] Wherein, F is a dynamic error integration value, P(t) is the main steam pressure at time t, and P r(t) is the preset main steam pressure value of the steam turbine at time t, γ is a preset weight coefficient, t0 is the start time of the first wave crest, and t3 is the end time of the first wave crest.

[0085] It should be noted that the present disclosure does not limit the execution order of steps S1021 and S1022.

[0086] S1023, determining the first ITAE of the steam turbine in the target time period according to the absolute error and the dynamic error.

[0087] In this step, after the absolute error and the dynamic error are determined, the first ITAE can be calculated by the following formula:

[0088]

[0089] Where, ITAE is the first ITAE, t is time, |e(t)| is the steady-state absolute error, P(t) is the main steam pressure at time t, P r (t) is the preset main steam pressure value of the steam turbine at time t, γ is a preset weight coefficient, t0 is the start time of the first wave crest, and t3 is the end time of the first wave crest.

[0090] Figure 4 is a steam turbine main steam pressure curve diagram according to an example embodiment of the present disclosure, as Figure 4 As shown, the horizontal axis represents time, the vertical axis represents the steam turbine main steam pressure value, and the shaded part represents the difference between the real-time main steam pressure of the steam turbine and the preset main steam pressure value during the entire main steam pressure regulation process of the steam turbine. The difference is affected by the comprehensive influence of the regulation time and the control deviation, and this influence can be quantified by the size of the ITAE. Therefore, the ITAE can be used to evaluate the control effect of the steam turbine.

[0091] Figure 5 is a flow chart of another method for determining the quality index of a steam turbine according to an example embodiment of the present disclosure, as Figure 5 As shown, the implementation of step S103 can include:

[0092] S1031, obtaining a reference decay rate.

[0093] In this step, when the steam turbine is running at an initial change rate, the steam turbine main steam pressure sensor collects a real-time main steam pressure, an absolute difference between a first wave peak value collected by the steam turbine main steam pressure sensor and a preset main steam pressure of the steam turbine is determined as a first main steam pressure dynamic deviation, denoted as h1, a sampling time of the main steam pressure is denoted as s1, according to engineering experience, a straight line with a slope K2 is drawn, so that a sampling time of a first wave trough collected by the steam turbine main steam pressure sensor is s2, an absolute difference between the sampling value and the preset main steam pressure is determined as a second main steam pressure dynamic deviation, denoted as h2, and the decay rate at this time is the reference decay rate.

[0094] For example, the reference decay rate can be calculated by the following formula:

[0095]

[0096] wherein, is the reference decay rate, h1 is the first main steam pressure dynamic deviation, and h2 is the second main steam pressure dynamic deviation.

[0097] S1032, acquiring a second ITAE of the steam turbine in the target time period when the steam turbine is running at the reference decay rate.

[0098] In this step, the second ITAE in the target time period can be acquired in the same way as the first ITAE in steps S101-S102, which will not be described here.

[0099] S1033, taking the second ITAE as the reference ITAE.

[0100] By using the above method, the second ITAE of the steam turbine in the target time period when the steam turbine is running at the reference decay rate is acquired, so that the second ITAE can be taken as the reference ITAE of the steam turbine.

[0101] Figure 6 is a block diagram of a device for determining a quality index of a steam turbine according to an example embodiment of the present disclosure, as shown in Figure 6 The device can include:

[0102] A first acquisition module 601 is configured to acquire a plurality of target main steam pressures of a steam turbine in a target time period.

[0103] A first determination module 602 is configured to determine a first ITAE of the steam turbine in the target time period according to the plurality of target main steam pressures.

[0104] A second acquisition module 603 is configured to acquire a reference ITAE of the steam turbine.

[0105] The second determining module 604 is configured to determine a quality index of the steam turbine according to the first ITAE and the reference ITAE, the quality index being used to represent a control effect of a control system of the steam turbine.

[0106] Optionally, the first determining module 602 is further configured to:

[0107] The target time period is a time period in which the main steam pressure of the steam turbine is at a first peak.

[0108] Optionally, the first determining module 602 is further configured to:

[0109] The first determining module 602 is further configured to:

[0110] The first determining module 602 is further configured to:

[0111] The first determining module 602 is further configured to:

[0112] Optionally, the second obtaining module 603 is further configured to:

[0113] The second obtaining module 603 is further configured to:

[0114] The second obtaining module 603 is further configured to:

[0115] The second obtaining module 603 is further configured to:

[0116] Optionally, the second obtaining module 603 is further configured to:

[0117] The second obtaining module 603 is further configured to:

[0118] The second obtaining module 603 is further configured to:

[0119] Optionally, the second determining module 604 is further configured to:

[0120] The second determining module 604 is further configured to:

[0121] Optionally, Figure 7 is a block diagram of another device for determining a quality index of a steam turbine according to an example embodiment of the present disclosure, as shown inFigure 7 The apparatus further includes:

[0122] The output module 605 is configured to output parameter adjustment information for prompting a user to adjust the control parameter of the steam turbine, in a case where it is determined that the quality index is lower than the historical quality index.

[0123] According to the apparatus, the first ITAE is determined according to the plurality of target main steam pressures of the steam turbine in the target time period, and the quality index of the steam turbine is determined by combining the first ITAE and the reference ITAE from the dynamic process and the static process, so that the accuracy of the determined quality index of the steam turbine is higher.

[0124] As to the apparatus in the above embodiments, the specific manners in which the modules perform operations have been described in detail in the embodiments of the method, and will not be described in detail here.

[0125] Figure 8 is a block diagram of an electronic device 800 according to an example embodiment of the present disclosure. As shown in Figure 8 The electronic device 800 can include one or more of a processor 801, a memory 802, a multimedia component 803, an input / output interface 804, and a communication component 805.

[0126] The processor 801 is configured to control overall operations of the electronic device 800 to complete all or part of the steps of the method for determining a steam turbine quality index described above. The memory 802 is configured to store various types of data to support operations of the electronic device 800, which can include, for example, instructions for any application or method operating on the electronic device 800, and application-related data, such as contact data, sent and received messages, pictures, audio, video, and the like. The memory 802 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk. The multimedia component 803 can include a screen and an audio component. The screen can be, for example, a touch screen, and the audio component is configured to output and / or input audio signals. For example, the audio component can include a microphone configured to receive external audio signals. The received audio signals can be further stored in the memory 802 or transmitted through the communication component 805. The audio component also includes at least one speaker configured to output audio signals. The input / output interface 804 provides an interface between the processor 801 and other interface modules, which can be a keyboard, a mouse, a button, and the like. The buttons can be virtual buttons or physical buttons. The communication component 805 is configured to perform wired or wireless communication between the electronic device 800 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, near field communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, and the like, or a combination of one or more of them, is not limited herein. Therefore, the corresponding communication component 805 can include a Wi-Fi module, a Bluetooth module, an NFC module, and the like.

[0127] In an exemplary embodiment, the electronic device 800 can be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic elements for performing the method of determining the quality index of a steam turbine.

[0128] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the method of determining the quality index of a steam turbine. For example, the computer-readable storage medium can be the memory 802 described above including program instructions, which can be executed by the processor 801 of the electronic device 800 to complete the method of determining the quality index of a steam turbine.

[0129] In another exemplary embodiment, a computer program product is also provided, which contains a computer program capable of being executed by a programmable device, and the computer program has code portions for executing the method of determining the quality index of a steam turbine when executed by the programmable device.

[0130] The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details in the above-described embodiments. Within the technical concept range of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure. In addition, it should be noted that various specific technical features described in the above-described specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present disclosure will not further describe various possible combination manners.

[0131] In addition, any combination of various different embodiments of the present disclosure can also be made, as long as it does not deviate from the idea of the present disclosure, and it should also be considered as the disclosed content of the present disclosure.

Claims

1. A method for determining the quality indicators of a steam turbine, characterized in that, include: Multiple target main steam pressures of the steam turbine are obtained within a target time period, wherein the target time period is the period during which the main steam pressure of the steam turbine is at the first peak; Based on the multiple target main steam pressures, the first ITAE of the steam turbine within the target time period is determined, where the first ITAE is the first combined time and absolute error ITAE. Obtain the reference ITAE of the steam turbine; Based on the first ITAE and the benchmark ITAE, the quality index of the steam turbine is determined, and the quality index is used to characterize the control effect of the control system of the steam turbine.

2. The method according to claim 1, characterized in that, The step of determining the first ITAE of the steam turbine within the target time period based on the multiple target main steam pressures includes: Multiple steady-state absolute errors are obtained within a historical time period, which includes the time from when the steam turbine started working to the current time. The steady-state absolute error is the absolute error when the main steam pressure of the steam turbine is in a stable state. The dynamic error within the target time period is determined based on the preset main steam pressure, the preset weighting coefficient, and multiple target main steam pressures. Based on the absolute error and the dynamic error, the first ITAE of the steam turbine within the target time period is determined.

3. The method according to claim 1, characterized in that, The process of obtaining the reference ITAE of the steam turbine includes: Obtain the baseline attenuation rate; With the turbine operating at the reference decay rate, the second ITAE of the turbine within the target time period is obtained; The second ITAE is used as the reference ITAE.

4. The method according to claim 3, characterized in that, The process of obtaining the reference attenuation rate includes: When the steam turbine is operating at a preset rate of change, the first dynamic deviation of the main steam pressure and the second dynamic deviation of the main steam pressure of the steam turbine are obtained. The reference attenuation rate is determined based on the dynamic deviation of the first main steam pressure and the dynamic deviation of the second main steam pressure.

5. The method according to claim 1, characterized in that, The process of determining the quality indicators of the steam turbine based on the first ITAE and the benchmark ITAE includes: The first ITAE and the reference ITAE are normalized to obtain the quality index of the steam turbine.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: If the quality index is determined to be lower than the historical quality index, parameter adjustment information is output, which is used to prompt the user to adjust the control parameters of the steam turbine.

7. An apparatus for determining the quality indicators of a steam turbine, characterized in that, include: The first acquisition module is used to acquire multiple target main steam pressures of the steam turbine within a target time period, wherein the target time period is the time period during which the main steam pressure of the steam turbine is at the first peak; The first determining module is used to determine the first ITAE of the steam turbine within the target time period based on the multiple target main steam pressures. The first ITAE is the first combined time and absolute error ITAE. The second acquisition module is used to acquire the reference ITAE of the steam turbine; The second determining module is used to determine the quality index of the steam turbine based on the first ITAE and the benchmark ITAE, wherein the quality index is used to characterize the control effect of the control system of the steam turbine.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the method described in any one of claims 1-6.

9. An electronic device, characterized in that, include: A memory on which computer programs are stored; A processor for executing the computer program in the memory to implement the steps of the method according to any one of claims 1-6.

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