Method and device for regulating the temperature of the lubricating oil of a steam turbine

Abstract

The application discloses a steam turbine lubricating oil temperature adjusting method and device, and relates to the technical field of steam turbine lubricating oil temperature control, wherein the method comprises the following steps: collecting real-time temperature data of the steam turbine lubricating oil; determining real-time flow data of the required cooling water according to the real-time temperature data and a preset lubricating oil temperature value; determining real-time comprehensive valve position according to the real-time flow data of the required cooling water; determining opening data of a main path adjusting valve according to the real-time comprehensive valve position and a pre-determined correlation between the opening of the main path adjusting valve and the comprehensive valve position; determining opening data of a bypass adjusting valve according to the real-time comprehensive valve position and a pre-determined correlation between the opening of the bypass adjusting valve and the comprehensive valve position; and controlling the main path adjusting valve and the bypass adjusting valve to adjust the temperature of the steam turbine lubricating oil according to the opening data of the main path adjusting valve and the opening data of the bypass adjusting valve. The application can improve the temperature control effect of the lubricating oil.

Description

Technical Field

[0001] This invention relates to the field of turbine lubricating oil temperature control technology, and in particular to a method and device for regulating turbine lubricating oil temperature. Background Technology

[0002] This section is intended to provide background or context for the embodiments of the invention set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section.

[0003] To ensure the safe and stable operation of steam turbines, high precision in lubricating oil temperature control is required. Currently, by adding a 100% electric regulating valve before the manual bypass valve of the steam turbine lubricating oil cooling system, only the main regulating valve needs to be opened when the total load is low or the ambient temperature is low; when the total load is high or the ambient temperature is high, the bypass regulating valve also needs to be opened for adjustment. In this way, the main regulating valve and the bypass regulating valve can jointly control the lubricating oil temperature.

[0004] However, during operation, the main regulating valve and the bypass regulating valve cannot simultaneously and automatically regulate the temperature of the lubricating oil. Operators need to manually operate the main regulating valve and the bypass regulating valve according to the unit's operating conditions to control the lubricating oil temperature, resulting in poor lubricating oil temperature control and potentially affecting the normal operation of the turbine. Summary of the Invention

[0005] This invention provides a method for regulating the temperature of steam turbine lubricating oil, enabling the main regulating valve and the bypass regulating valve to simultaneously and automatically regulate the temperature of the lubricating oil, thereby improving the temperature control effect of the lubricating oil and avoiding affecting the normal operation of the steam turbine. The method includes:

[0006] Collect real-time temperature data of turbine lubricating oil;

[0007] Based on real-time temperature data and preset lubricating oil temperature values, determine the required real-time flow rate of cooling water;

[0008] Based on the real-time flow data of the required cooling water, the real-time integrated valve position is determined; the real-time integrated valve position refers to the predicted integrated opening data of the regulating valve when both the main regulating valve and the bypass regulating valve are in automatic regulating mode.

[0009] Based on the real-time integrated valve position and the pre-determined correlation between the opening degree of the main control valve and the integrated valve position, the opening degree data of the main control valve is determined; based on the real-time integrated valve position and the pre-determined correlation between the opening degree of the bypass control valve and the integrated valve position, the opening degree data of the bypass control valve is determined.

[0010] Based on the opening data of the main control valve and the bypass control valve, the temperature of the turbine lubricating oil is regulated by controlling the main control valve and the bypass control valve.

[0011] This invention also provides a turbine lubricating oil temperature regulating device, which enables the main regulating valve and the bypass regulating valve to simultaneously and automatically regulate the temperature of the lubricating oil, thereby improving the temperature control effect of the lubricating oil and avoiding affecting the normal operation of the turbine. The device includes:

[0012] The data acquisition module is used to collect real-time temperature data of the turbine lubricating oil.

[0013] The flow rate determination module is used to determine the required real-time flow rate of cooling water based on real-time temperature data and preset lubricating oil temperature values.

[0014] The integrated valve position determination module is used to determine the real-time integrated valve position based on the required real-time flow data of cooling water; the real-time integrated valve position refers to the predicted integrated opening data of the regulating valve when both the main regulating valve and the bypass regulating valve are in automatic regulating mode.

[0015] The opening degree determination module is used to determine the opening degree data of the main control valve based on the real-time integrated valve position and the pre-determined correlation between the opening degree of the main control valve and the integrated valve position; and to determine the opening degree data of the bypass control valve based on the real-time integrated valve position and the pre-determined correlation between the opening degree of the bypass control valve and the integrated valve position.

[0016] The regulating module is used to control the temperature of the turbine lubricating oil by the main regulating valve and the bypass regulating valve according to the opening data of the main regulating valve and the bypass regulating valve.

[0017] This invention also provides a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the above-described turbine lubricating oil temperature regulation method.

[0018] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described turbine lubricating oil temperature regulation method.

[0019] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described turbine lubricating oil temperature regulation method.

[0020] In this embodiment of the invention, real-time temperature data of the turbine lubricating oil is collected; based on the real-time temperature data and a preset lubricating oil temperature value, the required real-time flow rate data of cooling water is determined; based on the required real-time flow rate data of cooling water, the real-time integrated valve position is determined; the real-time integrated valve position refers to the predicted integrated opening data of the regulating valve when both the main regulating valve and the bypass regulating valve are in automatic regulating mode; based on the real-time integrated valve position and the pre-determined correlation between the opening of the main regulating valve and the integrated valve position, the opening data of the main regulating valve is determined; based on the real-time integrated valve position and the pre-determined correlation between the opening of the bypass regulating valve and the integrated valve position, the opening data of the bypass regulating valve is determined; based on the opening data of the main regulating valve and the bypass regulating valve, the main regulating valve and the bypass regulating valve are controlled to regulate the temperature of the turbine lubricating oil. Compared to existing technologies where the main control valve and bypass control valve cannot simultaneously and automatically regulate the temperature of the lubricating oil, this new technology, by establishing a pre-determined relationship between the opening degree of the main control valve and the overall valve position (i.e., the overall opening degree data corresponding to the predicted cooling water flow rate in automatic control mode for both the main control valve and the bypass control valve), and the opening degree of the bypass control valve and the overall valve position, can calculate the real-time overall valve position after obtaining the required real-time cooling water flow data. Furthermore, the opening degree data of the main control valve and the bypass control valve can be calculated through the relationship. This eliminates the need for manual operation by operators and enables simultaneous automatic control of both the main control valve and the bypass control valve to regulate the temperature of the turbine lubricating oil. This improves the temperature control effect of the lubricating oil and prevents disruption to the normal operation of the turbine. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0022] Figure 1 This is a flowchart of a method for regulating the temperature of steam turbine lubricating oil provided in an embodiment of the present invention;

[0023] Figure 2 This is a flowchart illustrating the method for determining the correlation between the opening degree of the main control valve, the opening degree of the bypass control valve, and the overall valve position, as provided in an embodiment of the present invention.

[0024] Figure 3 This is an example diagram showing the curve of the opening degree of the main control valve versus the overall valve position provided in an embodiment of the present invention.

[0025] Figure 4This is an example diagram showing the curve of the opening degree of the bypass regulating valve versus the overall valve position provided in an embodiment of the present invention.

[0026] Figure 5 This is a schematic diagram of a turbine lubricating oil temperature regulating device provided in an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0029] In the description of this specification, the terms "comprising," "including," "having," and "containing" are open-ended terms, meaning that they include but are not limited to. The terms "an embodiment," "a specific embodiment," "some embodiments," and "for example," etc., refer to specific features, structures, or characteristics described in connection with that embodiment or example that are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. The order of steps involved in the various embodiments is used to illustrate the implementation of this application, and the order of steps is not limited and can be adjusted appropriately as needed.

[0030] To ensure the safe and stable operation of steam turbines, high precision in lubricating oil temperature control is required. Currently, by adding a 100% electrically operated regulating valve before the manual bypass valve of the steam turbine lubricating oil cooling system, both the main regulating valve and the bypass regulating valve can jointly control the lubricating oil temperature. Specifically, when the total load is low or the ambient temperature is low, only the main regulating valve needs to be opened; when the total load is high or the ambient temperature is high, the bypass regulating valve also needs to be opened for adjustment. In this way, the main regulating valve and the bypass regulating valve can jointly control the lubricating oil temperature.

[0031] However, research revealed that this method suffers from a problem in coordinating the regulation of the main control valve and the bypass control valve. In other words, during operation, the main control valve and the bypass control valve cannot simultaneously and automatically regulate the lubricating oil temperature. Operators must manually operate either the main control valve or the bypass control valve based on the unit's operating conditions to control the lubricating oil temperature. Therefore, this method has the following problems:

[0032] 1. The main regulating valve and the bypass regulating valve cannot simultaneously and automatically regulate the temperature of the lubricating oil; the regulation process is not flexible or complete enough.

[0033] 2. Operators manually operate the main or bypass regulating valves according to the unit's operating conditions, which increases their workload and consumes more human resources.

[0034] 3. The inability to achieve full-process temperature control of the lubricating oil results in poor temperature control of the lubricating oil, which may affect the normal operation of the steam turbine.

[0035] To address the aforementioned problems, this invention proposes a turbine lubricating oil temperature regulation scheme to reduce manual operation, enabling simultaneous automatic regulation of lubricating oil temperature by both the main regulating valve and the bypass regulating valve, achieving full-process temperature control of the lubricating oil, improving the temperature control effect of the lubricating oil, and avoiding impact on the normal operation of the turbine.

[0036] like Figure 1 The diagram shows a flowchart of a method for regulating the temperature of steam turbine lubricating oil according to an embodiment of the present invention. This method may include the following steps:

[0037] Step 101: Collect real-time temperature data of the turbine lubricating oil;

[0038] Step 102: Determine the required real-time flow rate of cooling water based on the real-time temperature data and the preset lubricating oil temperature value;

[0039] Step 103: Determine the real-time integrated valve position based on the required real-time flow data of cooling water; the real-time integrated valve position refers to the predicted integrated opening data of the regulating valve when both the main regulating valve and the bypass regulating valve are in automatic regulating mode.

[0040] Step 104: Determine the opening data of the main control valve based on the real-time integrated valve position and the pre-determined correlation between the opening of the main control valve and the integrated valve position; determine the opening data of the bypass control valve based on the real-time flow data and the pre-determined correlation between the opening of the bypass control valve and the integrated valve position.

[0041] Step 105: Based on the opening data of the main regulating valve and the bypass regulating valve, control the main regulating valve and the bypass regulating valve to adjust the temperature of the turbine lubricating oil.

[0042] In this embodiment of the invention, real-time temperature data of the turbine lubricating oil is collected; based on the real-time temperature data and a preset lubricating oil temperature value, the required real-time flow rate data of cooling water is determined; based on the required real-time flow rate data of cooling water, the real-time integrated valve position is determined; the real-time integrated valve position refers to the predicted integrated opening data of the regulating valve when both the main regulating valve and the bypass regulating valve are in automatic regulating mode; based on the real-time integrated valve position and the pre-determined correlation between the opening of the main regulating valve and the integrated valve position, the opening data of the main regulating valve is determined; based on the real-time integrated valve position and the pre-determined correlation between the opening of the bypass regulating valve and the integrated valve position, the opening data of the bypass regulating valve is determined; based on the opening data of the main regulating valve and the bypass regulating valve, the main regulating valve and the bypass regulating valve are controlled to regulate the temperature of the turbine lubricating oil. Compared to existing technologies where the main control valve and bypass control valve cannot simultaneously and automatically regulate the temperature of the lubricating oil, this new technology, by establishing a pre-determined relationship between the opening degree of the main control valve and the overall valve position (i.e., the overall opening degree data corresponding to the predicted cooling water flow rate in automatic control mode for both the main control valve and the bypass control valve), and the opening degree of the bypass control valve and the overall valve position, can calculate the real-time overall valve position after obtaining the required real-time cooling water flow data. Furthermore, the opening degree data of the main control valve and the bypass control valve can be calculated through the relationship. This eliminates the need for manual operation by operators and enables simultaneous automatic control of both the main control valve and the bypass control valve to regulate the temperature of the turbine lubricating oil. This improves the temperature control effect of the lubricating oil and prevents disruption to the normal operation of the turbine.

[0043] In this embodiment of the invention, Figure 1 The turbine lubricating oil temperature regulation method shown can be applied to turbine lubricating oil cooling systems, as well as other lubricating oil temperature regulation systems.

[0044] In one embodiment, execution Figure 1 Before demonstrating the turbine lubricating oil temperature regulation method, it is first necessary to determine the flow characteristic curves of the main control valve and the bypass control valve of the turbine lubricating oil system. Specifically, under the integrated valve position mode (i.e., both the main control valve and the bypass control valve are in automatic control mode), the relationship between the opening degree of the main control valve and the integrated valve position, as well as the relationship between the opening degree of the bypass control valve and the integrated valve position, must be determined. The integrated valve position refers to the predicted integrated valve opening data under the integrated valve position mode.

[0045] like Figure 2 As shown, the relationship between the opening degree of the main control valve and the overall valve position, and the relationship between the opening degree of the bypass control valve and the overall valve position can be determined in the following ways:

[0046] Step 201: Obtain multiple sets of test data by conducting multiple tests on the flow characteristics of turbine lubricating oil and cooling water. Each set of test data includes the test opening data of the main regulating valve, the test opening data of the bypass regulating valve, and the test flow data of the cooling water.

[0047] Step 202: Use the K-means clustering algorithm to cluster multiple sets of test data, and remove invalid data from the multiple sets of test data based on the clustering results;

[0048] Step 203: After removing invalid data from multiple sets of test data, determine the test comprehensive valve position corresponding to each test flow data based on the test flow data of cooling water in each set of test data.

[0049] Step 204: Using the least squares algorithm, fit the relationship between the test integrated valve position corresponding to each test flow data and the test opening data of the main control valve in each set of test data to obtain the correlation between the opening of the main control valve and the integrated valve position; using the least squares algorithm, fit the relationship between the test integrated valve position corresponding to each test flow data and the test opening data of the bypass control valve in each set of test data to obtain the correlation between the opening of the bypass control valve and the integrated valve position.

[0050] In specific implementation, in step 201, the flow characteristics test of the turbine lubricating oil cooling water can be conducted after the turbine unit is shut down. Specifically, before the test, ultrasonic flow meters can be installed on the main control valve and bypass control valve of the turbine lubricating oil cooling water system. Then, the main control valve is gradually opened in 5% increments. Once the main control valve is fully open, the bypass control valve is then gradually opened in 5% increments until it is fully open. After the test, the test opening data of the main control valve, the bypass control valve, and the cooling water flow rate data are collected. Moreover, to eliminate the influence of test errors on the valve flow characteristics, multiple sets of repeated tests can be performed to obtain multiple sets of test data.

[0051] In step 202, in order to further eliminate test errors, invalid data in multiple sets of test data can be filtered out. Specifically, the K-means clustering algorithm can be used to cluster multiple sets of test data, and invalid data in multiple sets of test data can be removed based on the clustering results.

[0052] In step 203, after removing invalid data from multiple sets of test data, the test comprehensive valve position corresponding to each test flow rate data can be determined based on the test flow rate data of cooling water in each set of test data.

[0053] In practice, a PID control algorithm can be used to calculate the overall test valve position corresponding to each test flow rate data based on the test flow rate data of the cooling water in each set of test data. The overall test valve position refers to the overall opening data corresponding to each test flow rate data predicted in the overall valve position mode.

[0054] PID algorithm, which stands for "proportional, integral, and derivative," is a common "stability-maintaining" control algorithm and a mature technology, so it will not be elaborated on further here.

[0055] In step 204, the least squares algorithm can be used to fit the relationship between the test integrated valve position corresponding to each test flow data and the test opening data of the main control valve in each set of test data to obtain the correlation between the opening of the main control valve and the integrated valve position; and to fit the relationship between the test integrated valve position corresponding to each test flow data and the test opening data of the bypass control valve in each set of test data to obtain the correlation between the opening of the bypass control valve and the integrated valve position.

[0056] In one embodiment, the relationship between the opening degree of the main control valve and the overall valve position can be expressed as a first functional relationship, which is Relationship 1:

[0057] f1(x)=k1x 3 +k2x 2 Relationship 1: +k3x+k4

[0058] Where k1, k2, k3, and k4 are four constants; f1(x) represents the opening degree of the main control valve, and x represents the overall valve position.

[0059] In practice, considering that the opening of the main control valve has a maximum limit, the range of f1(x) can be 0≤f1(x)≤the maximum opening of the main control valve.

[0060] For example, the relationship between the opening degree of the main control valve and the overall valve position can be represented by a curve, such as... Figure 3 The figure shown is an example curve of the opening degree of the main control valve versus the overall valve position. Figure 3 In the fitted curve, the first functional relationship is:

[0061] f1(x) = 0.0025x 3 -0.1782x 2 +4.8176x+5.873

[0062] according to Figure 3It can be seen that the value range of f1(x) is [0,100]; the value range of the integrated valve position is [0,46]; that is to say, when the integrated valve position is 46, the opening degree of the main control valve is approximately 100, which has reached the maximum value. At this time, even if the cooling water flow rate increases, causing the integrated valve position to increase, the opening degree of the main control valve will no longer change.

[0063] In one embodiment, the relationship between the opening degree of the bypass regulating valve and the overall valve position is expressed as a second functional relationship, which is Relationship 2:

[0064] f2(x)=b1x 5 +b2x 4 +b3x 3 +b4x 2 Relationship 2: +b5x+b6

[0065] Where b1, b2, b3, b4, b5, and b6 are six constants, f2(x) represents the opening degree of the bypass control valve, and x represents the overall valve position.

[0066] In practice, considering that the opening of the bypass control valve has a maximum limit, the range of f2(x) can be 0≤f2(x)≤the maximum opening of the bypass control valve. When the opening of the bypass control valve is 0, it means that the bypass control valve is not in use.

[0067] In practice, since the bypass regulating valve is used to assist the main regulating valve in temperature control, it is only activated when the main regulating valve is opened to its maximum degree.

[0068] For example, the relationship between the opening degree of the bypass control valve and the overall valve position can also be represented by a curve, such as... Figure 4 The figure shown is an example curve of the opening degree of the bypass control valve versus the overall valve position. Figure 4 In the fitted curve, the second functional relationship is:

[0069] f2(x) = 3 × 10 -6 x 5 -0.001x 4 +0.1413x 3 -9.8531x 2 +341.29x-4688.5

[0070] according to Figure 4 It can be seen that the range of f2(x) is [0,100]; the range of the comprehensive valve position is (46,100]; that is to say, when the comprehensive valve position exceeds 46, the main regulating valve has been opened to the maximum opening, and the bypass regulating valve opens automatically at this time; when the comprehensive valve position is approximately 100, the bypass regulating valve opens to the maximum opening.

[0071] In this way, the relationship between the opening degree of the main regulating valve and the overall valve position, as well as the relationship between the opening degree of the bypass regulating valve and the overall valve position, can be obtained. Based on the relationship between the opening degree of the two regulating valves and the overall valve position, the turbine lubricating oil system can control the temperature of the turbine lubricating oil by adjusting the main regulating valve and the bypass regulating valve.

[0072] The method for adjusting the temperature of the turbine lubricating oil is described in detail below.

[0073] In step 101 above, real-time temperature data of the turbine lubricating oil can be collected.

[0074] In step 102 above, the required real-time flow rate of cooling water can be determined based on real-time temperature data and preset lubricating oil temperature value.

[0075] In practice, the difference between the real-time temperature data and the preset lubricating oil temperature value can be calculated, and the required real-time flow rate of cooling water can be determined based on this difference.

[0076] In step 103 above, the real-time integrated valve position can be determined based on the real-time flow data of the required cooling water.

[0077] In practice, the real-time integrated valve position can be determined using a PID control algorithm and the required real-time cooling water flow data. The real-time integrated valve position refers to the predicted integrated opening data of the control valves when both the main control valve and the bypass control valve are in automatic control mode.

[0078] In step 104 above, the opening data of the main control valve can be determined based on the real-time integrated valve position and the pre-determined correlation between the opening of the main control valve and the integrated valve position; the opening data of the bypass control valve can be determined based on the real-time integrated valve position and the pre-determined correlation between the opening of the bypass control valve and the integrated valve position.

[0079] In one embodiment, step 103 above, determining the opening data of the main control valve based on the real-time integrated valve position and the predetermined correlation between the opening of the main control valve and the integrated valve position, may specifically include:

[0080] Substituting the real-time integrated valve position into the first functional relationship, the opening data of the main control valve is calculated.

[0081] In practice, the real-time integrated valve position x can be substituted into the above relationship 1 to calculate the opening data f1(x) of the main control valve.

[0082] In one embodiment, step 103 above, determining the opening data of the bypass control valve based on the real-time integrated valve position and the predetermined correlation between the opening degree of the bypass control valve and the integrated valve position, may specifically include:

[0083] Substituting the real-time integrated valve position into the second functional relationship, the opening data of the bypass control valve is calculated.

[0084] In practice, the real-time integrated valve position x can be substituted into the above relationship 2 to calculate the opening data f2(x) of the bypass control valve.

[0085] For example, substitute the real-time integrated valve position into... Figure 3 as well as Figure 4 The curves shown have the following functional relationships. For example, when the real-time integrated valve position x is 30, we get f1(30)≈58, that is, the opening of the main control valve is approximately 58; f2(30)≈-244, that is, the opening of the bypass control valve is approximately 0; when the integrated valve position x is 46, we get f1(46)≈98, that is, the opening of the main control valve has been approximately opened to the maximum of 100; f2(46)≈0, the opening of the bypass control valve is approximately 0; when the integrated valve position x is 60, we get f1(60)≈200, the opening of the main control valve is the maximum value of 100; f2(60)=20, the opening of the bypass control valve is approximately 20.

[0086] In step 105 above, the main control valve and the bypass control valve can be controlled to open to the corresponding opening degree based on the calculated opening data of the main control valve and the bypass control valve, thereby regulating the temperature of the turbine lubricating oil.

[0087] Thus, through the method of this embodiment of the invention, the main regulating valve first adjusts its own opening until it reaches its maximum. At this time, if the required real-time cooling water flow rate increases, causing the calculated comprehensive valve position to increase, the bypass regulating valve automatically opens and adjusts its own opening according to the change in the comprehensive valve position. This allows the main regulating valve and the bypass regulating valve to simultaneously and automatically regulate the temperature of the turbine lubricating oil. It eliminates the need for operators to manually operate the main regulating valve or the bypass regulating valve, saving manpower. Furthermore, it allows for continuous temperature control of the lubricating oil, improving the effectiveness of lubricating oil temperature control and preventing any impact on the normal operation of the turbine.

[0088] In one embodiment, when the main regulating valve and the bypass regulating valve simultaneously and automatically regulate the temperature of the turbine lubricating oil, some abnormalities may occur. Therefore, in this embodiment of the invention, it may further include:

[0089] Acquire real-time opening data of the main control valve and the bypass control valve;

[0090] An abnormal warning is sent if the deviation between the opening data of the main control valve and the real-time opening data of the main control valve is greater than the first preset data, the difference between the opening data of the bypass control valve and the real-time opening data of the bypass control valve is greater than the second preset data, or the difference between the real-time temperature data of the turbine lubricating oil and the preset lubricating oil temperature value is greater than the preset temperature difference. This allows operators to switch to manual control of the main control valve or bypass control valve to regulate the temperature of the turbine lubricating oil based on the abnormal warning.

[0091] In practical implementation, to ensure the reliability of the regulating valve's automatic temperature control, an abnormal alarm will be issued if one of the following conditions is met:

[0092] 1. The deviation between the opening data of the main control valve and the real-time opening data of the main control valve is greater than the first preset data; for example, the deviation between the opening of the main control valve and the real-time opening of the main control valve is greater than 20%.

[0093] 2. The difference between the opening data of the bypass control valve and the real-time opening data of the bypass control valve is greater than the second preset data; for example, the deviation between the opening of the bypass control valve and the real-time opening of the bypass control valve is greater than 20%.

[0094] 3. The difference between the real-time temperature data of the turbine lubricating oil and the preset lubricating oil temperature value is greater than the preset temperature difference; the difference between the real-time temperature data of the turbine lubricating oil and the preset lubricating oil temperature value is greater than 30℃.

[0095] Operators can switch to manual control of the main or bypass regulating valve to adjust the temperature of the turbine lubricating oil based on abnormal warnings.

[0096] In this embodiment of the invention, the aforementioned abnormal warning may cause the main control valve or bypass control valve to suddenly open or close. Therefore, it is necessary to perform reverse tracking of the opening degree of the main control valve or bypass control valve. Specifically, the real-time opening degree of the main control valve and bypass control valve can be tracked in reverse based on the real-time opening degree data of the main control valve, the correlation between the opening degree of the main control valve and the overall valve position, the real-time opening degree data of the bypass control valve, and the correlation between the opening degree of the bypass control valve and the overall valve position.

[0097] In practical implementation, the inverse function of Equation 1 can be derived based on the correlation between the opening degree of the main control valve and the overall valve position (Equation 1 above). Similarly, the inverse function of Equation 2 can be derived based on the correlation between the opening degree of the bypass control valve and the overall valve position (Equation 2 above). Then, the real-time opening data of the main control valve is substituted into the inverse function of Equation 1 to obtain the calculated overall valve position of the main control valve. Similarly, the real-time opening data of the bypass control valve is substituted into the inverse function of Equation 2 to obtain the calculated overall valve position of the bypass control valve. Thus, the opening degrees of the main control valve and the bypass control valve are tracked in reverse based on the differences between the calculated overall valve positions of the main control valve, the bypass control valve, and the real-time overall valve position.

[0098] This invention also provides a turbine lubricating oil temperature regulating device, as described in the following embodiments. Since the principle by which this device solves the problem is similar to the turbine lubricating oil temperature regulating method, the implementation of this device can refer to the implementation of the turbine lubricating oil temperature regulating method; repeated details will not be elaborated further.

[0099] like Figure 5 The diagram shown is a schematic of a turbine lubricating oil temperature regulating device provided in an embodiment of the present invention. The device may include:

[0100] The data acquisition module 501 is used to acquire real-time temperature data of the turbine lubricating oil;

[0101] The flow rate determination module 502 is used to determine the required real-time flow rate of cooling water based on real-time temperature data and preset lubricating oil temperature value.

[0102] The integrated valve position determination module 503 is used to determine the real-time integrated valve position based on the real-time flow data of the required cooling water; the real-time integrated valve position refers to the predicted integrated opening data of the regulating valve when both the main regulating valve and the bypass regulating valve are in automatic regulating mode.

[0103] The opening degree determination module 504 is used to determine the opening degree data of the main control valve based on the real-time integrated valve position and the pre-determined correlation between the opening degree of the main control valve and the integrated valve position; and to determine the opening degree data of the bypass control valve based on the real-time integrated valve position and the pre-determined correlation between the opening degree of the bypass control valve and the integrated valve position.

[0104] The regulating module 505 is used to control the temperature of the turbine lubricating oil by the main regulating valve and the bypass regulating valve according to the opening data of the main regulating valve and the opening data of the bypass regulating valve.

[0105] In one embodiment, a relationship determination module may also be included, used before the opening determination module determines the opening data of the main control valve and the bypass control valve:

[0106] Multiple sets of test data were obtained through repeated tests of the flow characteristics of turbine lubricating oil and cooling water. Each set of test data includes the test opening data of the main control valve, the test opening data of the bypass control valve, and the test flow data of the cooling water.

[0107] The K-means clustering algorithm is used to cluster multiple sets of test data, and invalid data in the test data are removed based on the clustering results.

[0108] After removing invalid data from multiple sets of test data, the test comprehensive valve position corresponding to each test flow rate data is determined based on the test flow rate data of cooling water in each set of test data.

[0109] Using the least squares algorithm, the relationship between the test integrated valve position corresponding to each test flow data and the test opening data of the main control valve in each set of test data is fitted to obtain the correlation between the opening of the main control valve and the integrated valve position. Using the least squares algorithm, the relationship between the test integrated valve position corresponding to each test flow data and the test opening data of the bypass control valve in each set of test data is fitted to obtain the correlation between the opening of the bypass control valve and the integrated valve position.

[0110] In one embodiment, the relationship between the opening degree of the main control valve and the overall valve position is expressed as a first functional relationship, which is:

[0111] f1(x)=k1x 3 +k2x 2 +k3x+k4

[0112] Where k1, k2, k3, and k4 are four constants; f1(x) represents the opening degree of the main control valve, and x represents the overall valve position;

[0113] The opening degree determination module can be used specifically for:

[0114] Substituting the real-time integrated valve position into the first functional relationship, the opening data of the main control valve is calculated.

[0115] In one embodiment, the relationship between the opening degree of the bypass regulating valve and the overall valve position is expressed as a second functional relationship, which is:

[0116] f2(x)=b1x 5 +b2x 4 +b3x 3 +b4x 2 +b5x+b6

[0117] Where b1, b2, b3, b4, b5, and b6 are six constants, f2(x) represents the opening degree of the bypass control valve, and x represents the overall valve position;

[0118] The opening degree determination module can also be used for:

[0119] Substituting the real-time integrated valve position into the second functional relationship, the opening data of the bypass control valve is calculated.

[0120] In one embodiment, the device may further include an anomaly warning module for:

[0121] Acquire real-time opening data of the main control valve and the bypass control valve;

[0122] An abnormal warning is sent if the deviation between the opening data of the main control valve and the real-time opening data of the main control valve is greater than the first preset data, the difference between the opening data of the bypass control valve and the real-time opening data of the bypass control valve is greater than the second preset data, or the difference between the real-time temperature data of the turbine lubricating oil and the preset lubricating oil temperature value is greater than the preset temperature difference. This allows operators to switch to manual control of the main control valve or bypass control valve to regulate the temperature of the turbine lubricating oil based on the abnormal warning.

[0123] This invention also provides a computer device, such as... Figure 6 The diagram shown is a schematic of a computer device in an embodiment of the present invention. The computer device 600 includes a memory 610, a processor 620, and a computer program 630 stored in the memory 610 and executable on the processor 620. When the processor 620 executes the computer program 630, it implements the above-mentioned turbine lubricating oil temperature regulation method.

[0124] This invention also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the above-described turbine lubricating oil temperature regulation method.

[0125] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the above-described turbine lubricating oil temperature regulation method.

[0126] In this embodiment of the invention, real-time temperature data of the turbine lubricating oil is collected; based on the real-time temperature data and a preset lubricating oil temperature value, the required real-time flow rate data of cooling water is determined; based on the required real-time flow rate data of cooling water, the real-time integrated valve position is determined; the real-time integrated valve position refers to the predicted integrated opening data of the regulating valve when both the main regulating valve and the bypass regulating valve are in automatic regulating mode; based on the real-time integrated valve position and the pre-determined correlation between the opening of the main regulating valve and the integrated valve position, the opening data of the main regulating valve is determined; based on the real-time integrated valve position and the pre-determined correlation between the opening of the bypass regulating valve and the integrated valve position, the opening data of the bypass regulating valve is determined; based on the opening data of the main regulating valve and the bypass regulating valve, the main regulating valve and the bypass regulating valve are controlled to regulate the temperature of the turbine lubricating oil. Compared to existing technologies where the main control valve and bypass control valve cannot simultaneously and automatically regulate the temperature of the lubricating oil, this new technology, by establishing a pre-determined relationship between the opening degree of the main control valve and the overall valve position (i.e., the overall opening degree data corresponding to the predicted cooling water flow rate in automatic control mode for both the main control valve and the bypass control valve), and the opening degree of the bypass control valve and the overall valve position, can calculate the real-time overall valve position after obtaining the required real-time cooling water flow data. Furthermore, the opening degree data of the main control valve and the bypass control valve can be calculated through the relationship. This eliminates the need for manual operation by operators and enables simultaneous automatic control of both the main control valve and the bypass control valve to regulate the temperature of the turbine lubricating oil. This improves the temperature control effect of the lubricating oil and prevents disruption to the normal operation of the turbine.

[0127] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0128] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1A device that provides the functions specified in one or more boxes.

[0129] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0130] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0131] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method of regulating the temperature of a turbine lubricating oil, characterized in that, The method comprises the following steps: collecting real-time temperature data of turbine lubricating oil; determining real-time flow data of required cooling water according to the real-time temperature data and a preset lubricating oil temperature value; determining real-time comprehensive valve position according to the real-time flow data of required cooling water; the real-time comprehensive valve position refers to predicted comprehensive opening degree data of the adjusting valve in the automatic adjusting mode of the main adjusting valve and the bypass adjusting valve; determining opening degree data of the main adjusting valve according to the real-time comprehensive valve position and a preset correlation between the opening degree of the main adjusting valve and the comprehensive valve position; and determining opening degree data of the bypass adjusting valve according to the real-time comprehensive valve position and a preset correlation between the opening degree of the bypass adjusting valve and the comprehensive valve position; controlling the main adjusting valve and the bypass adjusting valve to adjust the temperature of the turbine lubricating oil according to the opening degree data of the main adjusting valve and the opening degree data of the bypass adjusting valve; Before determining the opening degree data of the main adjusting valve and the bypass adjusting valve, the method further comprises the following steps: obtaining a plurality of sets of test data through a plurality of turbine lubricating oil cooling water flow characteristic tests; each set of test data comprises test opening degree data of the main adjusting valve, test opening degree data of the bypass adjusting valve and test flow data of the cooling water; performing clustering on the plurality of sets of test data by using a K-means clustering algorithm, and removing invalid data in the plurality of sets of test data according to a clustering result; after removing the invalid data in the plurality of sets of test data, determining a test comprehensive valve position corresponding to each test flow data according to the test flow data of the cooling water in each set of test data; the test comprehensive valve position refers to predicted comprehensive opening degree data corresponding to each test flow data in the comprehensive valve position mode; performing fitting on a relationship between the test comprehensive valve position corresponding to each test flow data and the test opening degree data of the main adjusting valve in each set of test data by using a least square method algorithm, to obtain a correlation between the opening degree of the main adjusting valve and the comprehensive valve position; and performing fitting on a relationship between the test comprehensive valve position corresponding to each test flow data and the test opening degree data of the bypass adjusting valve in each set of test data by using the least square method algorithm, to obtain a correlation between the opening degree of the bypass adjusting valve and the comprehensive valve position; the method further comprises the following steps: obtaining real-time opening degree data of the main adjusting valve and real-time opening degree data of the bypass adjusting valve; 2. The method of claim 1, wherein, in a case where a deviation between the opening degree data of the main adjusting valve and the real-time opening degree data of the main adjusting valve is greater than 20% of a first preset data, a difference between the opening degree data of the bypass adjusting valve and the real-time opening degree data of the bypass adjusting valve is greater than 20% of a second preset data, or a difference between the real-time temperature data of the turbine lubricating oil and the preset lubricating oil temperature value is greater than 30 DEG C of a preset temperature difference, sending an abnormality early warning, so that an operator switches to manually control the main adjusting valve or the bypass adjusting valve to adjust the temperature of the turbine lubricating oil according to the abnormality early warning. the correlation between the opening degree of the main adjusting valve and the comprehensive valve position is in the form of a first function relationship formula, and the first function relationship formula is: f1(x) = k1x 3 + k2x 2 + k3x + k4 Wherein, k1, k2, k3, k4 are four constants respectively; f1(x) represents the opening of the main road regulating valve, and x represents the integrated valve position; According to the real-time integrated valve position and the pre-determined correlation between the opening of the main road regulating valve and the integrated valve position, the opening data of the main road regulating valve is determined, comprising: The real-time integrated valve position is substituted into the first functional relationship formula, and the opening data of the main road regulating valve is calculated.

3. The method of claim 1, wherein, The correlation between the opening of the bypass regulating valve and the integrated valve position is in the form of a second functional relationship formula, and the second functional relationship formula is: f2(x) = b1x 5 + b2x 4 + b3x 3 + b4x 2 + b5x + b6 Wherein, b1, b2, b3, b4, b5, b6 are six constants respectively, f2(x) represents the opening of the bypass regulating valve, and x represents the integrated valve position; According to the real-time integrated valve position and the pre-determined correlation between the opening of the bypass regulating valve and the integrated valve position, the opening data of the bypass regulating valve is determined, comprising: The real-time integrated valve position is substituted into the second functional relationship formula, and the opening data of the bypass regulating valve is calculated.

4. A turbine lubricating oil temperature regulating device characterized by comprising: Comprise: The acquisition module is used for collecting real-time temperature data of the lubricating oil of the steam turbine; The flow determination module is used for determining real-time flow data of the required cooling water according to the real-time temperature data and the pre-set lubricating oil temperature value; The integrated valve position determination module is used for determining the real-time integrated valve position according to the real-time flow data of the required cooling water; the real-time integrated valve position refers to the predicted integrated opening data of the regulating valve when the main road regulating valve and the bypass regulating valve are in the automatic regulating mode; The opening determination module is used for determining the opening data of the main road regulating valve according to the real-time integrated valve position and the pre-determined correlation between the opening of the main road regulating valve and the integrated valve position; and determining the opening data of the bypass regulating valve according to the real-time integrated valve position and the pre-determined correlation between the opening of the bypass regulating valve and the integrated valve position; The regulating module is used for controlling the main road regulating valve and the bypass regulating valve to regulate the temperature of the lubricating oil of the steam turbine according to the opening data of the main road regulating valve and the opening data of the bypass regulating valve; Further comprising a correlation determination module, which is used for determining the opening data of the main road regulating valve and the bypass regulating valve before the opening determination module: Through multiple steam turbine lubricating oil cooling water flow characteristic tests, multiple sets of test data are obtained, each set of test data comprising test opening data of the main road regulating valve, test opening data of the bypass regulating valve and test flow data of the cooling water; The K-means clustering algorithm is used to cluster the multiple sets of test data, and the invalid data in the multiple sets of test data is removed according to the clustering result; After removing the invalid data in the multiple sets of test data, the test integrated valve position corresponding to each test flow data is determined according to the test flow data of the cooling water in each set of test data, comprising: the test integrated valve position corresponding to each test flow data is calculated according to the test flow data of the cooling water in each set of test data by the PID control algorithm; the test integrated valve position refers to the predicted integrated opening data corresponding to each test flow data in the integrated valve position mode; The least square method algorithm is used to fit the relationship between the test comprehensive valve position corresponding to each test flow data and the test opening data of the main regulating valve in each group of test data, to obtain the correlation between the opening of the main regulating valve and the comprehensive valve position; the least square method algorithm is used to fit the relationship between the test comprehensive valve position corresponding to each test flow data and the test opening data of the bypass regulating valve in each group of test data, to obtain the correlation between the opening of the bypass regulating valve and the comprehensive valve position; The device further comprises an abnormality early warning module for: obtaining real-time opening data of the main regulating valve and real-time opening data of the bypass regulating valve; In the case that the deviation between the opening data of the main regulating valve and the real-time opening data of the main regulating valve is greater than 20% of the first preset data, the difference between the opening data of the bypass regulating valve and the real-time opening data of the bypass regulating valve is greater than 20% of the second preset data, or the difference between the real-time temperature data of the turbine lubricating oil and the preset lubricating oil temperature value is greater than 30℃ of the preset temperature difference, an abnormality early warning is sent to enable the operator to switch to manually control the main regulating valve or the bypass regulating valve to adjust the temperature of the turbine lubricating oil according to the abnormality early warning.

5. The apparatus of claim 4, wherein, The correlation between the opening of the main regulating valve and the comprehensive valve position is in the form of a first function relationship, and the first function relationship is: f1(x) = k1x 3 + k2x 2 + k3x + k4 wherein k1, k2, k3 and k4 are four constants, f1(x) represents the opening of the main regulating valve, and x represents the comprehensive valve position; The opening determination module is specifically configured to: substitute the real-time comprehensive valve position into the first function relationship to obtain the opening data of the main regulating valve.

6. The apparatus of claim 4, wherein, The correlation between the opening of the bypass regulating valve and the comprehensive valve position is in the form of a second function relationship, and the second function relationship is: f2(x) = b1x 5 + b2x 4 + b3x 3 + b4x 2 + b5x + b6 wherein b1, b2, b3, b4, b5 and b6 are six constants, f2(x) represents the opening of the bypass regulating valve, and x represents the comprehensive valve position; The opening determination module is further configured to: substitute the real-time comprehensive valve position into the second function relationship to obtain the opening data of the bypass regulating valve.

7. A computer device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the method of any one of claims 1 to 3.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores a computer program, and the computer program is executed by the processor to implement the method of any one of claims 1 to 3.

9. A computer program product, characterised in that, The computer program product comprises a computer program, and the computer program is executed by the processor to implement the method of any one of claims 1 to 3.

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