Steam turbine regulating system flow characteristic detection method, device, equipment and medium

Abstract

The invention discloses a steam turbine adjusting system flow characteristic detection method, device and equipment and a medium. The method comprises the steps that basic operation parameters of a steam turbine set at a reference operation condition point are recorded; acquiring rated operating parameters of the steam turbine unit at the rated operating point; according to the basic operation parameters and the rated operation parameters, the basic main steam flow of the steam turbine unit at the reference operation condition point is calculated; real-time operation parameters of the steam turbine unit under the performance observation working condition are recorded; according to the real-time operation parameters, the basic operation parameters and the basic main steam flow, the actual main steam flow of the turboset under the performance observation working condition is calculated; and based on the actual main steam flow, the basic main steam flow, the real-time operation parameters and the basic operation parameters, the linearity of the flow characteristic of the turboset is detected, and a detection result is obtained. According to the scheme, a specific test environment does not need to be adopted, the detection result can be rapidly and accurately obtained, and the flow characteristic detection efficiency of the turbine adjusting system is further improved.

Description

Technical Field

[0001] The present application relates to the field of steam turbine operation technology, and in particular to a method, device, equipment and medium for detecting flow characteristics of a steam turbine regulating system. Background Art

[0002] With the continuous development of steam turbine technology, the steam turbine control system, as a key component for controlling and regulating the operating status of the steam turbine, can ensure the stable and efficient operation of the steam turbine according to the needs of the power grid. The steam turbine control system has functions such as speed control, load regulation, frequency regulation, protection, performance optimization, synchronization and decoupling. Among them, the flow characteristics of the steam turbine control system are one of the key factors affecting steam turbine performance. Its performance is directly related to the operating efficiency and stability of the power system. In order to improve the stability and security of the power system, it is particularly important to study the detection of the flow characteristics of the steam turbine control system.

[0003] At present, the flow characteristic detection of the traditional steam turbine regulating system requires the use of a specific test environment. However, the implementation process of this solution is relatively complicated and must be approved by the dispatcher before it can be carried out. The test process is restricted, making it impossible to perform flow characteristic detection in real time, resulting in low efficiency of flow characteristic detection of the steam turbine regulating system. Summary of the Invention

[0004] The purpose of this application is to provide a method, device, equipment and medium for detecting the flow characteristics of a turbine regulating system. Without the need for a specific test environment, the detection results can be obtained quickly and accurately using only historical data and real-time operation data, thereby further improving the efficiency of detecting the flow characteristics of the turbine regulating system.

[0005] To achieve the above objectives, this application provides the following solutions:

[0006] In a first aspect, the present application provides a method for detecting flow characteristics of a steam turbine regulating system, comprising:

[0007] Selecting a reference operating condition point within the normal operating load range of the steam turbine unit, and recording basic operating parameters of the steam turbine unit at the reference operating condition point;

[0008] Obtaining rated operating parameters of the steam turbine unit at a rated operating point;

[0009] Calculating a basic main steam flow rate of the steam turbine unit at the reference operating point according to the basic operating parameters and the rated operating parameters;

[0010] Taking each real-time operating condition point of the steam turbine unit as a performance observation condition, and recording the real-time operating parameters of the steam turbine unit under the performance observation condition;

[0011] Calculating an actual main steam flow rate of the steam turbine unit under the performance observation condition according to the real-time operating parameters, the basic operating parameters and the basic main steam flow rate;

[0012] Based on the actual main steam flow, the basic main steam flow, the real-time operating parameters and the basic operating parameters, the linearity of the flow characteristic of the steam turbine unit is detected to obtain a detection result.

[0013] Optionally, calculating the actual main steam flow of the steam turbine unit under the performance observation condition according to the real-time operating parameter, the basic operating parameter, and the basic main steam flow specifically includes:

[0014] Calculating an actual uncorrected flow rate of the steam turbine unit under a performance observation condition based on the real-time operating parameter, the basic operating parameter, and the basic main steam flow rate;

[0015] Calculating a geometric correction coefficient of the steam turbine unit under performance observation conditions based on the basic operating parameters and the real-time operating parameters;

[0016] The actual main steam flow of the steam turbine unit under the performance observation condition is calculated based on the actual uncorrected flow and the geometric correction coefficient.

[0017] Optionally, based on the actual main steam flow rate, the basic main steam flow rate, the real-time operating parameter, and the basic operating parameter, the linearity of the flow characteristic of the steam turbine unit is detected to obtain a detection result, including:

[0018] Determining an actual main steam flow percentage and a target main steam flow percentage of the steam turbine unit under the performance observation condition based on the actual main steam flow, the basic main steam flow, the real-time operating parameter, and the basic operating parameter;

[0019] The linearity of the flow characteristic of the steam turbine unit is detected according to the actual main steam flow percentage and the target main steam flow percentage to obtain a detection result.

[0020] Optionally, determining an actual main steam flow percentage and a target main steam flow percentage of the steam turbine unit under the performance observation condition based on the actual main steam flow, the basic main steam flow, the real-time operating parameter, and the basic operating parameter includes:

[0021] Calculating the actual main steam flow percentage based on the actual main steam flow, the basic main steam flow, and the basic operating parameters;

[0022] The target main steam flow percentage is calculated according to the geometric correction coefficient, the basic operating parameters and the real-time operating parameters.

[0023] Optionally, the linearity of the flow characteristic of the steam turbine unit is detected according to the actual main steam flow percentage and the target main steam flow percentage to obtain a detection result, including:

[0024] Calculating a difference between the actual main steam flow percentage and the target main steam flow percentage, and comparing the difference with a preset threshold;

[0025] When the difference is greater than the preset threshold, the detection result is that the linearity of the flow characteristic of the steam turbine unit is abnormal;

[0026] When the difference is not greater than the preset threshold, the detection result is that the linearity of the flow characteristic of the steam turbine unit is normal.

[0027] Optionally, a reference operating condition point is selected within the normal operating load range of the steam turbine unit, including:

[0028] Within the normal operating load range of the steam turbine unit, selecting an operating point where the steam turbine unit operates stably and the frequency regulation action is normal;

[0029] The operating condition point at which the steam turbine unit operates stably and the frequency regulation action is normal is used as the reference operating condition point.

[0030] Optionally, the basic operating parameters include at least one of the following: basic main steam pressure, basic regulating stage pressure, basic regulating stage temperature, basic high exhaust pressure, basic high exhaust temperature, and unit comprehensive valve position instruction value;

[0031] The rated operating parameters include at least one of the following: rated regulating stage pressure, rated regulating stage temperature, and rated main steam flow;

[0032] The real-time operating parameters include at least one of the following: real-time main steam pressure, real-time regulating stage pressure, real-time regulating stage temperature, real-time high exhaust pressure, and real-time high exhaust temperature.

[0033] In a second aspect, the present application provides a flow characteristic detection device for a steam turbine regulating system, comprising:

[0034] A first recording module is configured to select a reference operating condition point within the normal operating load range of the steam turbine unit and record basic operating parameters of the steam turbine unit at the reference operating condition point;

[0035] An acquisition module, configured to acquire rated operating parameters of the steam turbine unit at a rated operating point;

[0036] a first calculation module, configured to calculate a basic main steam flow rate of the steam turbine unit at the reference operating point according to the basic operating parameters and the rated operating parameters;

[0037] a second recording module, configured to use each real-time operating condition point of the steam turbine unit as a performance observation condition and record the real-time operating parameters of the steam turbine unit under the performance observation condition;

[0038] a second calculation module, configured to calculate an actual main steam flow rate of the steam turbine unit under the performance observation condition based on the real-time operating parameters, the basic operating parameters, and the basic main steam flow rate;

[0039] The detection module is used to detect the linearity of the flow characteristic of the steam turbine unit based on the actual main steam flow, the basic main steam flow, the real-time operating parameters and the basic operating parameters to obtain a detection result.

[0040] In a third aspect, the present application provides a computer device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for detecting flow characteristics of a steam turbine regulating system as described above.

[0041] In a fourth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the above-mentioned methods for detecting flow characteristics of a steam turbine regulating system.

[0042] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0043] The present application provides a method, device, equipment and medium for detecting the flow characteristics of a turbine regulating system, which selects a reference operating point within the normal operating load range of the turbine unit, records the basic operating parameters of the turbine unit at the reference operating point, and obtains the rated operating parameters of the turbine unit under rated conditions. Then, based on the basic operating parameters and the rated operating parameters, the basic main steam flow of the turbine unit at the basic operating point is calculated. With each real-time operating point of the turbine unit as the performance observation condition, the real-time operating parameters of the turbine unit under the performance observation condition are recorded. Based on the real-time operating parameters, the basic operating parameters and the basic main steam flow, the actual main steam flow of the turbine unit under the performance observation condition is calculated. Then, based on the actual main steam flow, the basic main steam flow, the real-time operating parameters and the basic operating parameters, the linearity of the flow characteristics of the turbine unit is detected to obtain a detection result. Compared with the existing technology, the technical solution of the present application does not require the use of a specific test environment, and can automatically perform flow characteristic detection. It can quickly determine the basic main steam flow at the reference operating point through the basic operating parameters and rated operating parameters of the turbine unit at the reference operating point, and comprehensively consider the real-time operating parameters, basic operating parameters and basic main steam flow parameters of the current operation of the turbine unit to accurately determine the actual main steam flow under the performance observation conditions. Then, only the historical data and current operating data of the turbine unit can be used to specifically detect the linearity of the flow characteristics of the turbine unit, and the detection results can be obtained quickly and accurately, further improving the flow characteristic detection efficiency of the turbine control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0045] Figure 1 This is an application environment diagram of a method for detecting flow characteristics of a steam turbine regulating system in one embodiment of the present application;

[0046] Figure 2 A flow chart of a method for detecting flow characteristics of a steam turbine regulating system provided in one embodiment of the present application;

[0047] Figure 3 A schematic structural diagram of a method for calculating the actual main steam flow rate of a steam turbine unit under performance observation conditions provided in one embodiment of the present application;

[0048] Figure 4 A flow chart of a method for detecting flow characteristics of a steam turbine regulating system provided in one embodiment of the present application;

[0049] Figure 5 A schematic diagram of the functional modules of a flow characteristic detection device for a steam turbine regulating system provided in one embodiment of the present application;

[0050] Figure 6 A schematic diagram of the structure of a computer device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0053] The method for detecting flow characteristics of a steam turbine regulating system provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be set up separately, integrated on the server 104, or placed on the cloud or other servers. The terminal 102 can send the normal operating load range of the steam turbine unit to the server 104. After receiving the normal operating load range of the steam turbine unit, the server 104 determines the reference operating point and records the basic operating parameters of the steam turbine unit at the reference operating point, and then obtains the rated operating parameters. Based on the basic operating parameters and the rated operating parameters, the basic main steam flow of the steam turbine unit at the reference operating point is calculated, and the real-time operating parameters of the steam turbine unit in the performance observation condition are determined. According to the actual main steam flow and the basic main steam flow, the linearity of the flow characteristics of the steam turbine unit is detected to obtain the detection results. The server 104 can feedback the obtained detection results to the terminal 102. In addition, in some embodiments, the flow characteristic detection method of the turbine regulation system can also be implemented independently by the server 104 or the terminal 102. For example, the terminal 102 can directly obtain corresponding parameters for the normal operating load range of the steam turbine unit to perform linearity detection, or the server 104 can obtain the normal operating load range of the steam turbine unit from the data storage system and obtain corresponding parameters for the normal operating load range of the steam turbine unit to perform linearity detection.

[0054] Terminal 102 may include, but is not limited to, various desktop computers, laptops, smartphones, tablet computers, IoT devices, and portable wearable devices. IoT devices may include smart speakers, smart TVs, smart air conditioners, and smart car devices. Portable wearable devices may include smart watches, smart bracelets, and head-mounted devices. Server 104 may be implemented as a standalone server or a server cluster consisting of multiple servers, or may be a cloud server.

[0055] In an exemplary embodiment, Figure 2 As shown, a method for detecting flow characteristics of a steam turbine regulating system is provided. The method is executed by a computer device, specifically a computer device such as a terminal or a server, or a terminal and a server. In the embodiment of the present application, the method is applied to Figure 1 The server 104 in the example is used as an example to illustrate the process, including the following steps 201 to 206.

[0056] Step 201 : Select a reference operating point within the normal operating load range of the steam turbine unit, and record basic operating parameters of the steam turbine unit at the reference operating point.

[0057] It should be noted that the normal operating load section of the steam turbine unit refers to the rated load section range corresponding to different load rates during the normal operation of the steam turbine unit, for example, it can be a load rate βe = 80% to 90%; the benchmark operating condition point refers to the operating condition point where the operation regulation of the steam turbine unit is stable and the frequency regulation action is normal; the basic operating parameters refer to the parameters of the actual operation of the steam turbine unit at the basic operating condition point.

[0058] The process of selecting a reference operating condition point within the normal operating load range of the steam turbine unit may include: selecting an operating condition point within the normal operating load range of the steam turbine unit at which the steam turbine unit's operation regulation is stable and the frequency regulation is normal, and using the operating condition point at which the steam turbine unit's operation regulation is stable and the frequency regulation is normal as the reference operating condition point. For example, when the normal operating load range of the steam turbine unit is a load factor βe=80% to 90%, a search may be performed within the normal operating load range to determine whether there is an operating condition point at which the operation regulation is stable and the frequency regulation is normal. If so, the operating condition point at which the operation regulation is stable and the frequency regulation is normal is used as the reference operating condition point. For example, the reference operating condition point is the operating condition point corresponding to a load factor βe=86%, and this operating condition point may be marked as point 0.

[0059] After selecting the reference operating point (0 point), the basic operating parameters corresponding to the reference operating point of the steam turbine can be recorded. The basic operating parameters may include at least one of the following: basic main steam pressure P 00 , basic regulating stage pressure P t0 , basic regulation level temperature T t0, basic high discharge pressure P gp0 , basic high exhaust temperature T gp0 , the unit’s comprehensive valve position command value φ0.

[0060] It is understood that the steam turbine regulating system may include components such as a steam boiler, a steam turbine, a multi-stage nozzle, a regulating valve, an intercooler, a high-pressure cylinder, and a low-pressure cylinder. The multi-stage nozzle may include a first-stage nozzle and a regulating-stage nozzle. 00 It refers to the pressure before the steam boiler is delivered to the turbine inlet, that is, the pressure in the pipeline before the steam enters the high-pressure cylinder. t0 It refers to the steam pressure after the steam turbine regulating valve and before the first stage nozzle. The regulating stage pressure depends on the main steam pressure and the opening of the regulating valve. Basic regulating stage temperature T t0 It refers to the steam temperature before the regulating stage nozzle of the steam turbine unit. The temperature of the regulating stage will affect the thermal efficiency of the steam turbine and the heat resistance of the material. gp0 It refers to the pressure at the high pressure cylinder exhaust port under normal operating conditions. The steam discharged from the high pressure cylinder will enter the intercooler or the next low pressure cylinder, so this pressure level reflects the thermodynamic state inside the steam turbine unit. Normally, the basic high exhaust pressure will vary within a specific range to ensure that the steam turbine unit can operate efficiently and stably. Basic high exhaust temperature T gp0 Refers to the steam temperature at the high-pressure cylinder exhaust port. The unit's integrated valve position command value φ0 is the command signal used to control the opening degree of the turbine unit's regulating valve. This command signal determines the steam flow entering the turbine unit, which in turn affects the turbine unit's speed and output power.

[0061] Optionally, the above-mentioned basic operating parameters can be imported from external devices, obtained by developers in real time from the regulation system, or obtained from a database or blockchain. This application does not impose any restrictions on the method of obtaining the basic operating parameters of the steam turbine unit at the benchmark operating point.

[0062] Step 202: Obtain the rated operating parameters of the steam turbine unit at the rated operating point.

[0063] It should be noted that the rated operating point (Pe condition) mentioned above refers to the standard operating conditions specified during the design, which represents the typical operating conditions under which the steam turbine unit can operate safely and stably under the optimal design state. The rated operating parameters mentioned above refer to the operating parameters corresponding to the steam turbine unit under the rated operating point. They may include at least one of the following: rated regulating stage pressure P te , Rated regulating stage temperature T te , Rated main steam flow G e .

[0064] Optionally, the above-mentioned rated operating parameters can be obtained by querying the design data of the turbine manufacturer, or can be obtained by importing from an external device, or can be obtained by querying a preset database or blockchain. This embodiment does not impose any restrictions on the method of obtaining the rated operating parameters of the turbine unit.

[0065] Step 203 : Calculate the basic main steam flow rate of the steam turbine unit at the reference operating point according to the basic operating parameters and the rated operating parameters.

[0066] It should be noted that the above-mentioned basic main steam flow rate refers to the total amount of steam passing through the inlet of the turbine unit per unit time. It is an important parameter for measuring the energy conversion efficiency and power output of the turbine. The basic main steam flow rate is usually expressed by mass flow rate, and the unit is kilograms per second (kg / s) or tons per hour (t / h).

[0067] Specifically, after obtaining the basic operating parameters and the rated operating parameters, the basic main steam flow rate G0 of the steam turbine unit at the reference operating condition point can be calculated using the following formula based on the basic regulating stage pressure and basic regulating stage temperature in the basic operating parameters, and the rated regulating stage pressure, rated regulating stage temperature, and rated main steam flow in the rated operating parameters:

[0068]

[0069] Among them, P t0 is the basic regulating stage pressure of the steam turbine unit, T t0 is the basic regulating stage temperature of the steam turbine unit, P te is the rated regulating stage pressure of the steam turbine unit, T te is the rated regulating stage temperature of the steam turbine unit, G e is the rated main steam flow.

[0070] In this embodiment, the basic operating parameters and rated operating parameters can accurately determine the basic main steam flow of the turbine unit at the reference operating point, which is convenient for providing good data guidance information for the subsequent linearity detection of the flow characteristics of the turbine unit.

[0071] Step 204 : Taking each real-time operating condition point of the steam turbine set as a performance observation condition, and recording the real-time operating parameters of the steam turbine set under the performance observation condition.

[0072] Specifically, during the actual operation of the steam turbine unit, each real-time operating condition point can be used as a performance observation condition. Each real-time operating condition point includes multiple points, each of which can be used as a performance observation condition and has corresponding real-time operating parameters.

[0073] For example, the i-th operating point is used as the performance observation operating condition, and the real-time operating parameters of the steam turbine unit at the i-th operating point are obtained. The real-time operating parameters include at least one of the following: real-time main steam pressure P 0i , Real-time adjustment of stage pressure P ti , Real-time adjustment of stage temperature T ti , Real-time high exhaust pressure P gpi , Real-time high exhaust temperature T gpi .

[0074] Optionally, the real-time operating parameters of the steam turbine unit under performance observation conditions may be obtained through real-time detection, or may be obtained by importing from an external device, or may be obtained through a database or blockchain. This embodiment does not impose any limitation on the method of obtaining the real-time operating parameters.

[0075] Step 205 : Calculate the actual main steam flow of the steam turbine unit under the performance observation condition based on the real-time operating parameters, the basic operating parameters and the basic main steam flow.

[0076] Step 206 : Based on the actual main steam flow rate, the basic main steam flow rate, the real-time operating parameters and the basic operating parameters, the linearity of the flow characteristic of the steam turbine unit is detected to obtain a detection result.

[0077] It should be noted that the actual main steam flow rate refers to the main steam flow rate of the steam turbine unit under performance observation conditions, and the basic main steam flow rate refers to the main steam flow rate of the steam turbine unit under baseline operating conditions. The above test results are used to indicate whether the linearity of the steam turbine unit flow characteristics is normal, and can include whether the linearity of the flow characteristics is normal or abnormal.

[0078] Specifically, after obtaining the real-time operating parameters, basic operating parameters and basic main steam flow, the actual uncorrected flow and geometric correction coefficient can be calculated based on the real-time operating parameters and the basic operating parameters, and then the actual main steam flow of the turbine unit under the performance observation conditions can be calculated based on the actual uncorrected flow and the geometric correction coefficient.

[0079] After obtaining the actual main steam flow, the corresponding linearity index result can be determined based on the actual main steam flow, basic main steam flow, real-time operating parameters and basic operating parameters, and then the linearity index result is compared with the preset threshold to obtain the detection result.

[0080] The present application provides a method for detecting the flow characteristics of a steam turbine regulating system, by selecting a reference operating condition point within the normal operating load range of the steam turbine unit, recording the basic operating parameters of the steam turbine unit at the reference operating condition point, and obtaining the rated operating parameters of the steam turbine unit under rated conditions, and then calculating the basic main steam flow of the steam turbine unit at the basic operating condition point based on the basic operating parameters and the rated operating parameters, taking each real-time operating condition point of the steam turbine unit as a performance observation condition, recording the real-time operating parameters of the steam turbine unit under the performance observation condition, and calculating the actual main steam flow of the steam turbine unit under the performance observation condition based on the real-time operating parameters, the basic operating parameters and the basic main steam flow, and then detecting the linearity of the flow characteristics of the steam turbine unit based on the actual main steam flow, the basic main steam flow, the real-time operating parameters and the basic operating parameters to obtain a detection result. Compared with the existing technology, the technical solution of the present application does not require the use of a specific test environment, and can automatically perform flow characteristic detection. It can quickly determine the basic main steam flow at the reference operating point through the basic operating parameters and rated operating parameters of the turbine unit at the reference operating point, and comprehensively consider the real-time operating parameters, basic operating parameters and basic main steam flow parameters of the current operation of the turbine unit to accurately determine the actual main steam flow under the performance observation conditions. Then, only the historical data and current operating data of the turbine unit can be used to specifically detect the linearity of the flow characteristics of the turbine unit, and the detection results can be obtained quickly and accurately, further improving the flow characteristic detection efficiency of the turbine control system.

[0081] In another exemplary embodiment of the present application, in order to accurately determine the actual main steam flow of the steam turbine unit under the performance observation condition, the actual main steam flow of the steam turbine unit under the performance observation condition can be calculated based on the real-time operating parameters, the basic operating parameters and the basic main steam flow, such as Figure 3 As shown, the above step 205 is replaced by the following steps 301 to 303:

[0082] Step 301 : Calculate the actual uncorrected flow of the steam turbine unit under the performance observation condition based on the real-time operating parameters, the basic operating parameters and the basic main steam flow.

[0083] Step 302 : Calculate the geometric correction coefficient of the steam turbine unit under the performance observation condition based on the basic operating parameters and the real-time operating parameters.

[0084] Step 303 : Calculate the actual main steam flow rate of the steam turbine unit under the performance observation condition based on the actual uncorrected flow rate and the geometric correction coefficient.

[0085] It should be noted that the actual uncorrected flow rate of the steam turbine unit under performance observation conditions described above refers to the actual flow rate of steam passing through the steam turbine unit under performance observation conditions, and this flow rate has not been normalized for any conditions such as temperature, pressure, or superheat. The geometric correction parameter is a key parameter used to adjust the theoretical design value to match actual operating conditions. This parameter is typically used to correct performance deviations caused by differences between actual and designed geometric dimensions.

[0086] Specifically, after obtaining the real-time operating parameters of the steam turbine unit under the performance observation condition, the basic operating parameters and the basic main steam flow under the benchmark operating condition, the real-time regulating stage pressure and real-time regulating stage temperature in the real-time operating parameters, as well as the basic regulating stage pressure and basic regulating stage temperature in the basic operating parameters, can be obtained. Then, the actual uncorrected flow of the steam turbine unit under the performance observation condition can be calculated using the following formula:

[0087]

[0088] Among them, P ti To adjust the stage pressure in real time, P t0 is the basic regulating stage pressure, T t0 is the basic regulating stage temperature, T ti In order to adjust the stage temperature in real time, G0 is the basic main steam flow.

[0089] The computer device can pre-establish mapping relationships between real-time regulating stage pressure, real-time regulating stage temperature, and basic regulating stage steam specific volume and real-time regulating stage steam specific volume based on historical data, and can store these mapping relationships in a mapping table. The real-time regulating stage steam specific volume refers to the regulating stage steam specific volume under performance observation conditions, and the basic regulating stage steam specific volume refers to the regulating stage steam specific volume under baseline operating conditions.

[0090] Specifically, after obtaining the real-time operating parameters, the stage pressure P can be adjusted in real time based on the real-time operating parameters. ti And real-time adjustment of stage temperature T ti , and then adjust the stage pressure P based on the real-time ti And real-time adjustment of stage temperature T ti Obtain the basic regulating stage steam specific volume V from the above mapping table t0 , the real-time regulation stage steam specific volume V corresponding to the first performance observation condition t1 Then, the basic regulating stage pressure and basic main steam pressure are obtained from the basic operating parameters, and the real-time regulating stage pressure and real-time high exhaust pressure are obtained from the real-time operating parameters. Then, based on the basic regulating stage pressure, basic main steam pressure, basic high exhaust pressure, real-time regulating stage pressure, real-time high exhaust pressure, basic regulating stage steam specific volume V t0 and real-time adjustment of the steam specific volume Vt1 Calculate the geometric correction factor, which can be expressed by the following formula:

[0091]

[0092] Among them, P t1 is the real-time regulating stage pressure under the first performance observation condition, P t0 is the basic regulating stage pressure, P 00 is the basic main steam pressure, P gp0 is the basic high discharge pressure, P 0i is the real-time main steam pressure, P gp1 is the real-time high exhaust pressure under the first performance observation condition, V t0 is the basic regulating stage steam specific volume, V t1 is the real-time regulating stage steam specific volume under the first performance observation condition, P ti is the real-time regulating stage pressure under the i-th performance observation condition.

[0093] After obtaining the actual uncorrected traffic and geometric correction factor α i Finally, the actual main steam flow of the steam turbine unit under the performance observation condition is calculated, which can be expressed by the following formula:

[0094]

[0095] Among them, α i is the geometric correction factor, is the actual uncorrected flow rate, G i is the actual main steam flow rate.

[0096] In this embodiment, based on the real-time operating parameters, basic operating parameters and basic main steam flow, the actual uncorrected flow and geometric correction coefficient can be accurately determined, and then based on the actual uncorrected flow and geometric correction coefficient, the actual main steam flow of the turbine unit under the performance observation conditions can be more accurately determined, which facilitates the subsequent detection of the linearity of the flow characteristics of the turbine unit based on the actual main steam flow, thereby improving the detection accuracy.

[0097] In another exemplary embodiment of the present application, after determining the actual main steam flow rate, in order to make the detection result more accurate, the linearity of the flow characteristic of the steam turbine unit can be detected based on the actual main steam flow rate, the basic main steam flow rate, the real-time operating parameters and the basic operating parameters, such as Figure 4 As shown, the above step 206 may include the following steps S401 to S402:

[0098] Step S401 : determining the actual main steam flow percentage and the target main steam flow percentage of the steam turbine unit under performance observation conditions based on the actual main steam flow, the basic main steam flow, the real-time operating parameters and the basic operating parameters.

[0099] It can be understood that the above-mentioned actual main steam flow percentage refers to the ratio of the main steam flow actually passing through the turbine unit under the performance observation conditions to the basic main steam flow under the benchmark operating conditions, which can be used to evaluate the load level of the turbine unit under the current performance observation conditions.

[0100] Specifically, after obtaining the actual main steam flow, basic main steam flow, real-time operating parameters and basic operating parameters, they can be calculated to obtain the main steam flow percentage and target main steam flow percentage of the steam turbine unit under performance observation conditions.

[0101] The actual main steam flow percentage is calculated based on the actual main steam flow, the basic main steam flow and the basic operating parameters, and the target main steam flow percentage is calculated based on the geometric correction coefficient, the basic operating parameters and the real-time operating parameters.

[0102] In this embodiment, the computer device can determine the unit comprehensive valve position command value φ0 from the basic operating parameters, and based on the unit comprehensive valve position command value φ0, the actual main steam flow G i The actual main steam flow percentage is calculated from the basic main steam flow G0 and can be expressed by the following formula:

[0103]

[0104] Among them, φ0 is the comprehensive valve position command value of the unit, G i is the actual main steam flow rate, and G0 is the basic main steam flow rate.

[0105] After obtaining the actual main steam flow percentage, the basic main steam pressure and basic regulating stage pressure can be obtained from the basic operating parameters, and the real-time main steam pressure and real-time regulating stage pressure can be obtained from the real-time operating parameters. Then, the target main steam flow percentage is calculated based on the geometric correction parameters, basic main steam pressure, basic regulating stage pressure, real-time main steam pressure and real-time regulating stage pressure. It can be expressed by the following formula:

[0106]

[0107] Among them, α i is the geometric correction factor, P 00 is the basic main steam pressure, P 0i is the real-time main steam pressure, P t0 is the basic regulating stage pressure, P tiis the real-time regulating stage pressure under the i-th performance observation condition.

[0108] Step 402 : According to the actual main steam flow percentage and the target main steam flow percentage, the linearity of the flow characteristic of the steam turbine unit is tested to obtain a test result.

[0109] Specifically, after obtaining the actual main steam flow percentage and the target main steam flow percentage, the difference between the actual main steam flow percentage and the target main steam flow percentage can be calculated first, and the difference can be compared with a preset threshold; when the difference is greater than the preset threshold, the detection result is that the linearity of the flow characteristic of the steam turbine unit is abnormal; when the difference is not greater than the preset threshold, the detection result is that the linearity of the flow characteristic of the steam turbine unit is normal.

[0110] It can be understood that by calculating the difference between the actual main steam flow percentage and the target main steam flow percentage, the gap between the two can be determined, and whether the gap is large can be judged. When the gap is large, it indicates that the linearity of the flow characteristic of the steam turbine unit is abnormal; when the gap is small, it indicates that the linearity of the flow characteristic of the steam turbine unit is normal. Among them, the difference δ between the actual main steam flow percentage and the target main steam flow percentage can be expressed by the following formula:

[0111]

[0112] in, is the target main steam flow percentage, It is the percentage of actual main steam flow.

[0113] The difference is then compared with a preset threshold. For example, if the preset threshold is 0.5%, then when |δ|>0.5%|, it indicates that the difference between the actual main steam flow percentage and the target main steam flow percentage is large, and the corresponding detection result is that the linearity of the flow characteristic of the steam turbine unit is abnormal; when |δ|≤0.5%|, it indicates that the difference between the actual main steam flow percentage and the target main steam flow percentage is small, and the corresponding detection result is that the linearity of the flow characteristic of the steam turbine unit is normal.

[0114] In this embodiment, based on the actual main steam flow, basic main steam flow, basic operating parameters and actual operating parameters, there is no need to conduct high-risk specific regulation system characteristic tests. Only the historical data and current operating data of the turbine unit regulation system can be used to accurately determine the actual main steam flow percentage and the target main steam flow percentage of the turbine unit under the performance observation conditions, and then determine the gap between the actual main steam flow percentage and the target main steam flow percentage, so as to more finely determine the test results of the linearity of the turbine unit flow characteristics based on the gap, further improving the application space of the regulation system.

[0115] The present application also provides an application scenario, which applies the above-mentioned method for detecting the flow characteristics of a steam turbine regulating system. Specifically: the method for detecting the flow characteristics of a steam turbine regulating system provided in this embodiment can be applied in the scenario of detecting the flow characteristics of a steam turbine regulating system. By selecting a reference operating point within the normal operating load range of the steam turbine unit, and obtaining the basic operating parameters corresponding to the reference operating point and the rated operating parameters of the rated operating point, as well as the real-time operating parameters of the real-time operating point, the linearity of the flow characteristics of the steam turbine unit is detected based on the basic operating parameters, the rated operating parameters and the real-time operating parameters, and the detection results are obtained. The method for detecting the flow characteristics of a steam turbine regulating system provided in this embodiment belongs to the link of detecting the flow characteristics.

[0116] Based on the same inventive concept, embodiments of the present application further provide a device for detecting flow characteristics of a steam turbine regulating system, for implementing the aforementioned method for detecting flow characteristics of a steam turbine regulating system. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more embodiments of the device for detecting flow characteristics of a steam turbine regulating system provided below can be found in the aforementioned limitations of the method for detecting flow characteristics of a steam turbine regulating system, and will not be further elaborated here.

[0117] In an exemplary embodiment, Figure 5 As shown, a flow characteristic detection device for a steam turbine regulating system is provided, comprising:

[0118] The first recording module 610 is configured to select a reference operating point within the normal operating load range of the steam turbine unit and record basic operating parameters of the steam turbine unit at the reference operating point;

[0119] An acquisition module 620 is used to acquire rated operating parameters of the steam turbine unit at a rated operating point;

[0120] The first calculation module 630 is used to calculate the basic main steam flow rate of the steam turbine unit at the reference operating point based on the basic operating parameters and the rated operating parameters;

[0121] The second recording module 640 is configured to use each real-time operating condition point of the steam turbine unit as a performance observation condition and record the real-time operating parameters of the steam turbine unit under the performance observation condition;

[0122] The second calculation module 650 is used to calculate the actual main steam flow rate of the steam turbine unit under the performance observation condition based on the real-time operating parameters, the basic operating parameters and the basic main steam flow rate;

[0123] The detection module 660 is used to detect the linearity of the flow characteristics of the steam turbine unit based on the actual main steam flow, the basic main steam flow, the real-time operating parameters and the basic operating parameters to obtain a detection result.

[0124] As an optional implementation manner, the second calculation module 650 is specifically configured to:

[0125] Calculate the actual uncorrected flow of the steam turbine unit under performance observation conditions based on real-time operating parameters, basic operating parameters and basic main steam flow;

[0126] Calculate the geometric correction coefficient of the steam turbine unit under performance observation conditions based on basic operating parameters and real-time operating parameters;

[0127] The actual main steam flow of the steam turbine unit under performance observation conditions is calculated based on the actual uncorrected flow and the geometric correction factor.

[0128] As an optional implementation, the detection module 660 is specifically configured to:

[0129] Determine the actual main steam flow percentage and the target main steam flow percentage of the steam turbine unit under the performance observation condition based on the actual main steam flow, the basic main steam flow, the real-time operating parameters and the basic operating parameters;

[0130] According to the actual main steam flow percentage and the target main steam flow percentage, the linearity of the flow characteristic of the steam turbine unit is tested to obtain a test result.

[0131] As an optional implementation, the detection module 660 is further configured to:

[0132] Calculate the actual main steam flow percentage based on the actual main steam flow, basic main steam flow and basic operating parameters;

[0133] The target main steam flow percentage is calculated based on the geometric correction coefficient, basic operating parameters and real-time operating parameters.

[0134] As an optional implementation, the detection module 660 is further configured to:

[0135] Calculating the difference between the actual main steam flow percentage and the target main steam flow percentage, and comparing the difference with a preset threshold;

[0136] When the difference is greater than the preset threshold, the detection result is that the linearity of the flow characteristic of the steam turbine unit is abnormal;

[0137] When the difference is not greater than the preset threshold, the detection result is that the linearity of the flow characteristic of the steam turbine unit is normal.

[0138] As an optional implementation, the first recording module 610 is specifically configured to:

[0139] Within the normal operating load range of the steam turbine unit, select the operating point where the steam turbine unit is stable in operation and the frequency regulation is normal;

[0140] The operating point where the steam turbine unit is stable and the frequency regulation action is normal is taken as the benchmark operating point.

[0141] As an optional implementation, the basic operating parameters include at least one of the following: basic main steam pressure, basic regulating stage pressure, basic regulating stage temperature, basic high exhaust pressure, basic high exhaust temperature, and unit comprehensive valve position instruction value;

[0142] The rated operating parameters include at least one of the following: rated regulating stage pressure, rated regulating stage temperature, and rated main steam flow;

[0143] The real-time operating parameters include at least one of the following: real-time main steam pressure, real-time regulating stage pressure, real-time regulating stage temperature, real-time high exhaust pressure, and real-time high exhaust temperature.

[0144] Among them, the turbine regulation system flow characteristic detection device provided in this embodiment does not require the use of a specific test environment, and can automatically perform flow characteristic detection. Through the basic operating parameters and rated operating parameters of the turbine unit at the reference operating point, the basic main steam flow at the reference operating point is quickly determined, and the real-time operating parameters, basic operating parameters and basic main steam flow parameters of the current operation of the turbine unit are comprehensively considered to accurately determine the actual main steam flow under the performance observation conditions. Then, only the historical data and current operating data of the turbine unit are used to specifically detect the linearity of the flow characteristics of the turbine unit, and the detection results can be obtained quickly and accurately, further improving the efficiency of the flow characteristic detection of the turbine regulation system.

[0145] In an exemplary embodiment, a computer device is provided. The computer device may be a server or a terminal. The internal structure diagram thereof may be as follows: Figure 6As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O) and a communication interface. The processor, memory and input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store flow characteristic detection data of a steam turbine regulation system. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for detecting flow characteristics of a steam turbine regulation system is implemented.

[0146] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0147] In an exemplary embodiment, a computer device is further provided, including a memory and a processor. The memory stores a computer program, and the processor implements the steps in the above method embodiments when executing the computer program.

[0148] In an exemplary embodiment, a computer-readable storage medium is provided, storing a computer program. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0149] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0150] Those skilled in the art will understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0151] The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may include, but are not limited to, general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic units, data processing logic units based on quantum computing, and the like.

[0152] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0153] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the method and core concept of this application. At the same time, for those skilled in the art, based on the concept of this application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A method for detecting flow characteristics of a steam turbine regulating system, characterized in that: The method for detecting flow characteristics of a steam turbine regulating system comprises: Selecting a reference operating condition point within the normal operating load range of the steam turbine unit, and recording basic operating parameters of the steam turbine unit at the reference operating condition point; Obtaining rated operating parameters of the steam turbine unit at a rated operating point; Calculating a basic main steam flow rate of the steam turbine unit at the reference operating point according to the basic operating parameters and the rated operating parameters; Taking each real-time operating condition point of the steam turbine unit as a performance observation condition, and recording the real-time operating parameters of the steam turbine unit under the performance observation condition; Calculating an actual main steam flow rate of the steam turbine unit under the performance observation condition according to the real-time operating parameters, the basic operating parameters and the basic main steam flow rate; Based on the actual main steam flow, the basic main steam flow, the real-time operating parameters and the basic operating parameters, the linearity of the flow characteristic of the steam turbine unit is detected to obtain a detection result.

2. The method for detecting flow characteristics of a steam turbine regulating system according to claim 1, characterized in that: Calculating the actual main steam flow of the steam turbine unit under the performance observation condition according to the real-time operating parameters, the basic operating parameters, and the basic main steam flow, specifically includes: Calculating an actual uncorrected flow rate of the steam turbine unit under a performance observation condition based on the real-time operating parameter, the basic operating parameter, and the basic main steam flow rate; Calculating a geometric correction coefficient of the steam turbine unit under performance observation conditions based on the basic operating parameters and the real-time operating parameters; The actual main steam flow of the steam turbine unit under the performance observation condition is calculated based on the actual uncorrected flow and the geometric correction coefficient.

3. The method for detecting flow characteristics of a steam turbine regulating system according to claim 2, wherein: Based on the actual main steam flow rate, the basic main steam flow rate, the real-time operating parameters, and the basic operating parameters, the linearity of the flow characteristic of the steam turbine unit is detected to obtain a detection result, including: Determining an actual main steam flow percentage and a target main steam flow percentage of the steam turbine unit under the performance observation condition based on the actual main steam flow, the basic main steam flow, the real-time operating parameter, and the basic operating parameter; The linearity of the flow characteristic of the steam turbine unit is detected according to the actual main steam flow percentage and the target main steam flow percentage to obtain a detection result.

4. The method for detecting flow characteristics of a steam turbine regulating system according to claim 3, wherein: Determining an actual main steam flow percentage and a target main steam flow percentage of the steam turbine unit under the performance observation condition based on the actual main steam flow, the basic main steam flow, the real-time operating parameter, and the basic operating parameter includes: Calculating the actual main steam flow percentage based on the actual main steam flow, the basic main steam flow, and the basic operating parameters; The target main steam flow percentage is calculated according to the geometric correction coefficient, the basic operating parameters and the real-time operating parameters.

5. The method for detecting flow characteristics of a steam turbine regulating system according to claim 3, wherein: The linearity of the flow characteristic of the steam turbine unit is detected according to the actual main steam flow percentage and the target main steam flow percentage to obtain a detection result, including: Calculating a difference between the actual main steam flow percentage and the target main steam flow percentage, and comparing the difference with a preset threshold; When the difference is greater than the preset threshold, the detection result is that the linearity of the flow characteristic of the steam turbine unit is abnormal; When the difference is not greater than the preset threshold, the detection result is that the linearity of the flow characteristic of the steam turbine unit is normal.

6. The method for detecting flow characteristics of a steam turbine regulating system according to claim 1, characterized in that: The reference operating condition points are selected within the normal operating load range of the steam turbine unit, including: Within the normal operating load range of the steam turbine unit, selecting an operating point where the steam turbine unit operates stably and the frequency regulation action is normal; The operating condition point at which the steam turbine unit operates stably and the frequency regulation action is normal is used as the reference operating condition point.

7. The method for detecting flow characteristics of a steam turbine regulating system according to any one of claims 1 to 6, characterized in that: The basic operating parameters include at least one of the following: basic main steam pressure, basic regulating stage pressure, basic regulating stage temperature, basic high-pressure exhaust pressure, basic high-pressure exhaust temperature, and unit comprehensive valve position instruction value; The rated operating parameters include at least one of the following: rated regulating stage pressure, rated regulating stage temperature, and rated main steam flow; The real-time operating parameters include at least one of the following: real-time main steam pressure, real-time regulating stage pressure, real-time regulating stage temperature, real-time high exhaust pressure, and real-time high exhaust temperature.

8. A flow characteristic detection device for a steam turbine regulating system, characterized in that: The steam turbine regulating system flow characteristic detection device comprises: A first recording module is configured to select a reference operating condition point within the normal operating load range of the steam turbine unit and record basic operating parameters of the steam turbine unit at the reference operating condition point; An acquisition module, configured to acquire rated operating parameters of the steam turbine unit at a rated operating point; a first calculation module, configured to calculate a basic main steam flow rate of the steam turbine unit at the reference operating point according to the basic operating parameters and the rated operating parameters; a second recording module, configured to use each real-time operating condition point of the steam turbine unit as a performance observation condition and record the real-time operating parameters of the steam turbine unit under the performance observation condition; a second calculation module, configured to calculate an actual main steam flow rate of the steam turbine unit under the performance observation condition based on the real-time operating parameters, the basic operating parameters, and the basic main steam flow rate; The detection module is used to detect the linearity of the flow characteristic of the steam turbine unit based on the actual main steam flow, the basic main steam flow, the real-time operating parameters and the basic operating parameters to obtain a detection result.

9. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for detecting flow characteristics of a steam turbine regulating system according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for detecting flow characteristics of a steam turbine regulating system according to any one of claims 1 to 7 are implemented.

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