A method and system for early warning of high exhaust pressure of intermediate pressure cylinder of steam turbine

Abstract

The present application proposes a method, system, electronic device and storage medium for warning high exhaust pressure of an intermediate pressure cylinder of a steam turbine, wherein the method includes: determining the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine, calculating the pressure safety factor of the intermediate pressure cylinder of the steam turbine based on the reference exhaust absolute pressure and exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition, and controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning based on the comparison result of the pressure safety factor with a preset pressure safety early warning value, thereby realizing real-time early warning of the exhaust pressure of the intermediate pressure cylinder of the steam turbine based on the pressure safety factor of the intermediate pressure cylinder of the steam turbine, thereby ensuring safe operation of the steam turbine.

Description

Technical Field

[0001] The present application relates to the technical field of steam turbines, and in particular to a method, system, electronic equipment and storage medium for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine. Background Art

[0002] At present, high exhaust pressure of the intermediate pressure cylinder of the steam turbine is a common operating problem of thermal power units. When the operating parameters of the steam turbine enter the high intermediate pressure range, the operating state of the steam turbine is unstable and there is a risk of system pressure buildup. In related technologies, the usual treatment method is to close the reheat steam inlet regulating valve, reduce the steam inlet flow and pressure, and reduce the exhaust pressure of the intermediate pressure cylinder of the steam turbine, thereby adjusting the operating range point to a safe area. However, this treatment method is passive and cannot provide real-time early warning of the exhaust pressure of the intermediate pressure cylinder of the steam turbine, which may reduce the load of the steam turbine unit. If the operation is improper, it may also cause the turbine to trip the protection system (Emergency Trip System, ETS). Therefore, a more intelligent early warning method for high exhaust pressure of the intermediate pressure cylinder of the steam turbine is urgently needed. Summary of the Invention

[0003] The present application proposes a method, system, electronic equipment and storage medium for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine.

[0004] The first aspect embodiment of the present application proposes a method for warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine, the method comprising: determining the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine, and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine; calculating the pressure safety factor of the intermediate pressure cylinder of the steam turbine based on the reference exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve condition and the exhaust absolute pressure; and controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning based on the comparison result of the pressure safety factor with a preset pressure safety warning value.

[0005] In one embodiment of the present application, the exhaust absolute pressure of the steam turbine intermediate pressure cylinder is determined based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the steam turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder, including: collecting multiple measured pressures of multiple exhaust pressure measuring points corresponding to the steam turbine intermediate pressure cylinder, and taking the average value of the multiple measured pressures as the average measured pressure corresponding to the steam turbine intermediate pressure cylinder; and taking the sum of the average measured pressure and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder as the exhaust absolute pressure of the steam turbine intermediate pressure cylinder.

[0006] In one embodiment of the present application, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to issue an early warning based on the comparison result between the pressure safety factor and the preset pressure safety warning value, including: when the pressure safety factor is less than or equal to the preset pressure safety warning value, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to operate normally without issuing an early warning; when the pressure safety factor is greater than the preset pressure safety warning value, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to issue an early warning.

[0007] In one embodiment of the present application, when the pressure safety factor is greater than a preset pressure safety warning value, after controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning, it also includes: obtaining the valve opening value of the intermediate and low pressure connecting pipe between the intermediate pressure cylinder and the low pressure cylinder of the steam turbine; based on the comparison result of the valve opening value and the pressure safety factor, controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to regulate the valve opening value of the intermediate and low pressure connecting pipe.

[0008] In one embodiment of the present application, based on the comparison result of the valve opening value and the pressure safety factor, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to regulate the valve opening value of the intermediate and low pressure connecting pipe, including: when the pressure safety factor is less than or equal to the valve opening value, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to regulate the valve opening value of the intermediate and low pressure connecting pipe at a first regulation speed, and calculate the target pressure safety factor after regulation, until the target pressure safety factor is less than or equal to the preset pressure safety warning value, the regulation is stopped; when the pressure safety factor is greater than the valve opening value, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to regulate the valve opening value of the intermediate and low pressure connecting pipe at a second regulation speed, and calculate the target pressure safety factor after regulation, until the target pressure safety factor is less than or equal to the preset pressure safety warning value, wherein the regulation is stopped when the second regulation speed is much greater than the first regulation speed.

[0009] The present application proposes a method for warning high exhaust pressure of an intermediate pressure cylinder of a steam turbine. The method determines the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine. The pressure safety factor of the intermediate pressure cylinder of the steam turbine is calculated based on the reference exhaust absolute pressure and the exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition. According to the comparison result of the pressure safety factor and the preset pressure safety warning value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to issue a warning. Thus, based on the pressure safety factor of the intermediate pressure cylinder of the steam turbine, a real-time warning of the exhaust pressure of the intermediate pressure cylinder of the steam turbine is achieved to ensure the safe operation of the steam turbine.

[0010] The second aspect of the present application proposes a high early warning system for exhaust steam pressure of a steam turbine intermediate pressure cylinder of an equipment, the system comprising: a determination module for determining the exhaust absolute pressure of the steam turbine intermediate pressure cylinder based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the steam turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder; a calculation module for calculating the pressure safety factor of the steam turbine intermediate pressure cylinder based on the reference exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve condition and the exhaust absolute pressure; an early warning module for controlling the monitoring system corresponding to the steam turbine intermediate pressure cylinder to issue an early warning based on the comparison result of the pressure safety factor with a preset pressure safety early warning value.

[0011] In one embodiment of the present application, the determination module is specifically used to: collect multiple measured pressures of multiple exhaust pressure measuring points corresponding to the steam turbine intermediate pressure cylinder, and use the average value of the multiple measured pressures as the average measured pressure corresponding to the steam turbine intermediate pressure cylinder; and use the sum of the average measured pressure and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder as the exhaust absolute pressure of the steam turbine intermediate pressure cylinder.

[0012] In one embodiment of the present application, the early warning module includes: a first control unit, used to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to operate normally without issuing an early warning when the pressure safety factor is less than or equal to a preset pressure safety early warning value; a second control unit, used to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning when the pressure safety factor is greater than the preset pressure safety early warning value.

[0013] In one embodiment of the present application, the early warning module further includes: an acquisition unit for acquiring the valve opening value of the medium- and low-pressure connecting pipe between the medium-pressure cylinder and the low-pressure cylinder in the steam turbine; a third control unit for controlling the monitoring system corresponding to the medium-pressure cylinder of the steam turbine to regulate the valve opening value of the medium- and low-pressure connecting pipe based on the comparison result of the valve opening value and the pressure safety factor.

[0014] In one embodiment of the present application, the third control unit is specifically used to: when the pressure safety factor is less than or equal to the valve opening value, control the monitoring system corresponding to the steam turbine intermediate pressure cylinder to regulate the valve opening value of the intermediate and low pressure connecting pipe at a first control speed, and calculate the target pressure safety factor after control, and stop the control until the target pressure safety factor is less than or equal to the preset pressure safety warning value; when the pressure safety factor is greater than the valve opening value, control the monitoring system corresponding to the steam turbine intermediate pressure cylinder to regulate the valve opening value of the intermediate and low pressure connecting pipe at a second control speed, and calculate the target pressure safety factor after control, and stop the control until the target pressure safety factor is less than or equal to the preset pressure safety warning value, wherein the second control speed is much greater than the first control speed.

[0015] The present application proposes a high early warning system for the exhaust steam pressure of the intermediate pressure cylinder of a steam turbine. The exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine is determined based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine. The pressure safety factor of the intermediate pressure cylinder of the steam turbine is calculated based on the reference exhaust absolute pressure and the exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition. According to the comparison result of the pressure safety factor and the preset pressure safety early warning value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to issue an early warning. Thus, based on the pressure safety factor of the intermediate pressure cylinder of the steam turbine, a real-time early warning of the exhaust steam pressure of the intermediate pressure cylinder of the steam turbine is achieved to ensure the safe operation of the steam turbine.

[0016] The third aspect embodiment of the present application proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and runnable on the processor. When the processor executes the program, the turbine intermediate pressure cylinder exhaust pressure high warning method in the embodiment of the present application is implemented.

[0017] The fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon. When the program is executed by a processor, the turbine intermediate pressure cylinder exhaust pressure high warning method in the embodiment of the present application is provided.

[0018] Other effects of the above optional manner will be described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 1 is a flow chart of a method for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine provided in an embodiment of the present application;

[0020] Figure 2 1 is a flow chart of another method for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine provided in an embodiment of the present application;

[0021] Figure 3 1 is a flow chart of another method for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine provided in an embodiment of the present application;

[0022] Figure 4 This is a structural block diagram of a steam turbine intermediate pressure cylinder exhaust high pressure early warning system provided by an embodiment of the present application;

[0023] Figure 5 This is a structural diagram of a steam turbine intermediate pressure cylinder exhaust pressure high warning system provided in an embodiment of the present application;

[0024] Figure 6 This is a structural diagram of another steam turbine intermediate pressure cylinder exhaust pressure high warning system provided in an embodiment of the present application;

[0025] Figure 7 It is a block diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0027] The following describes, with reference to the accompanying drawings, a method, system, electronic device, and storage medium for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine according to an embodiment of the present application.

[0028] Figure 1 The figure is a flow chart of a method for warning high exhaust pressure of a steam turbine intermediate pressure cylinder provided in an embodiment of the present application. It should be noted that the execution subject of the method for warning high exhaust pressure of a steam turbine intermediate pressure cylinder provided in this embodiment is a warning system for high exhaust pressure of a steam turbine intermediate pressure cylinder. The warning system for high exhaust pressure of a steam turbine intermediate pressure cylinder can be implemented by software and / or hardware. The warning system for high exhaust pressure of a steam turbine intermediate pressure cylinder in this embodiment can be an electronic device, or can be configured in an electronic device. The electronic device in this embodiment can include a server, etc. This embodiment does not specifically limit the electronic device.

[0029] Figure 1 It is a flow chart of a method for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine provided in an embodiment of the present application.

[0030] like Figure 1 As shown, the steam turbine intermediate pressure cylinder exhaust pressure high early warning method may include:

[0031] Step 101 : determining the exhaust absolute pressure of the steam turbine intermediate pressure cylinder according to a plurality of measured pressures at a plurality of exhaust pressure measuring points corresponding to the steam turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder.

[0032] In some embodiments, the plurality of exhaust pressure measuring points may be arranged at the outlet of the intermediate pressure cylinder of the steam turbine, but is not limited thereto.

[0033] In some embodiments, the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine may be the atmospheric pressure measured by a pressure sensor disposed at the outlet of the intermediate pressure cylinder of the steam turbine, but is not limited thereto.

[0034] Among them, it can be understood that, based on the multiple measured pressures of the multiple exhaust pressure measuring points corresponding to the turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the turbine intermediate pressure cylinder, one implementation method for determining the exhaust absolute pressure of the turbine intermediate pressure cylinder can be to collect the multiple measured pressures of the multiple exhaust pressure measuring points corresponding to the turbine intermediate pressure cylinder, and use the average value of the multiple measured pressures as the average measured pressure corresponding to the turbine intermediate pressure cylinder, and use the sum of the average measured pressure and the atmospheric pressure corresponding to the turbine intermediate pressure cylinder as the exhaust absolute pressure of the turbine intermediate pressure cylinder.

[0035] Specifically, when the average measured pressure is P2 and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine is P1, the exhaust absolute pressure P3 of the intermediate pressure cylinder of the steam turbine can be calculated as follows:

[0036] P3=P2+P1

[0037] In this embodiment, the number of the multiple exhaust pressure measuring points may be 3, but is not limited thereto.

[0038] In other embodiments, to ensure the accuracy of the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine, data preprocessing can be performed on multiple measured pressures and atmospheric pressure to eliminate bad quality data, thereby improving the reliability of the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine.

[0039] Step 102 : Calculate the pressure safety factor of the intermediate pressure cylinder of the steam turbine based on the reference exhaust absolute pressure and the exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition.

[0040] In some embodiments, based on the reference exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve condition and the exhaust absolute pressure, an implementation method for calculating the pressure safety factor of the intermediate pressure cylinder of the steam turbine can be to use the ratio of the exhaust absolute pressure to the reference exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve condition as the pressure safety factor of the intermediate pressure cylinder of the steam turbine.

[0041] Specifically, when the exhaust absolute pressure is P3 and the turbine is in the valve wide open (VWO) condition with the reference exhaust absolute pressure P0 corresponding to the intermediate pressure cylinder, the calculation formula for the pressure safety factor K of the intermediate pressure cylinder of the turbine can be:

[0042]

[0043] Among them, the reference exhaust absolute pressure P0 corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition is fixed and can be obtained from the production manual corresponding to the steam turbine, but is not limited to this.

[0044] Step 103 : Based on the comparison result of the pressure safety factor and the preset pressure safety warning value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to issue a warning.

[0045] In some embodiments, the preset pressure safety warning value can be set in combination with the actual business scenario corresponding to the turbine intermediate pressure cylinder. Specifically, the relevant technical personnel can select the value range of the pressure safety warning in combination with the actual business scenario, and select a target pressure safety warning value in the re-value range. For example, the value range of the pressure safety warning can be 0.9~0.95, and the target pressure safety warning value can be 0.9, but is not limited to this.

[0046] In some embodiments, when the pressure safety factor is less than or equal to a preset pressure safety alarm value, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to operate normally without issuing an early warning. When the pressure safety factor is greater than the preset pressure safety alarm value, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to issue an early warning. In this way, a real-time active early warning of the exhaust pressure of the steam turbine intermediate pressure cylinder is achieved, which facilitates timely processing of the early warning at a later stage and reduces the accident rate of the steam turbine.

[0047] The present application proposes a method for warning high exhaust pressure of an intermediate pressure cylinder of a steam turbine. The method determines the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine. The pressure safety factor of the intermediate pressure cylinder of the steam turbine is calculated based on the reference exhaust absolute pressure and the exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition. According to the comparison result of the pressure safety factor and the preset pressure safety warning value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to issue a warning. Thus, based on the pressure safety factor of the intermediate pressure cylinder of the steam turbine, a real-time warning of the exhaust pressure of the intermediate pressure cylinder of the steam turbine is achieved to ensure the safe operation of the steam turbine.

[0048] Figure 2 It is a flow chart of another method for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine provided in an embodiment of the present application.

[0049] like Figure 2 As shown, the steam turbine intermediate pressure cylinder exhaust pressure high early warning method may include:

[0050] Step 201 : determining the exhaust absolute pressure of the steam turbine intermediate pressure cylinder according to a plurality of measured pressures at a plurality of exhaust pressure measuring points corresponding to the steam turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder.

[0051] Step 202 : Calculate the pressure safety factor of the intermediate pressure cylinder of the steam turbine based on the reference exhaust absolute pressure and the exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition.

[0052] It should be noted that, for the specific implementation of steps 201 to 202, reference may be made to the relevant description in the above embodiment.

[0053] Step 203 : When the pressure safety factor is less than or equal to the preset pressure safety warning value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to operate normally without issuing a warning.

[0054] In some embodiments, when the pressure safety factor is less than or equal to a preset pressure safety warning value, it indicates that the exhaust pressure of the steam turbine intermediate pressure cylinder is within the normal pressure range. There is no need to control the monitoring system corresponding to the steam turbine intermediate pressure cylinder to issue an early warning, so as to maintain the normal operation of the steam turbine intermediate pressure cylinder.

[0055] Step 204 : When the pressure safety factor is greater than a preset pressure safety warning value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to issue a warning.

[0056] In some embodiments, when the pressure safety factor is greater than a preset pressure safety warning value, it means that the exhaust pressure of the intermediate pressure cylinder of the steam turbine exceeds the normal pressure range, and it is necessary to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning. In addition, it is also necessary to obtain the valve opening value of the intermediate and low pressure connecting pipe between the intermediate pressure cylinder and the low pressure cylinder of the steam turbine. Based on the comparison result of the valve opening value and the pressure safety factor, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to adjust the valve opening value of the intermediate and low pressure connecting pipe until the target pressure safety factor after adjustment is less than or equal to the preset pressure safety warning value, and the intermediate pressure cylinder of the steam turbine is controlled to operate stably.

[0057] Specifically, when the pressure safety factor is less than or equal to the valve opening value, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to regulate the valve opening value of the intermediate and low pressure connecting pipes at a first regulation speed, and the target pressure safety factor after regulation is calculated, and the regulation is stopped until the target pressure safety factor is less than or equal to the preset pressure safety warning value.

[0058] When the pressure safety factor is greater than the valve opening value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to regulate the valve opening value of the intermediate and low pressure connecting pipes at a second regulation speed, and calculate the target pressure safety factor after regulation until the target pressure safety factor is less than or equal to the preset pressure safety warning value, and the regulation is stopped when the second regulation speed is much greater than the first regulation speed.

[0059] The present application proposes a method for warning high exhaust pressure of an intermediate pressure cylinder of a steam turbine. The method determines the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine. The pressure safety factor of the intermediate pressure cylinder of the steam turbine is calculated based on the reference exhaust absolute pressure and the exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve condition. When the pressure safety factor is less than or equal to a preset pressure safety alarm value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to operate normally without warning. When the pressure safety factor is greater than the preset pressure safety alarm value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to issue a warning. Thus, based on the pressure safety factor of the intermediate pressure cylinder of the steam turbine, a real-time warning of the exhaust pressure of the intermediate pressure cylinder of the steam turbine is achieved, thereby improving the reliability of the operation of the steam turbine.

[0060] In summary, this application also provides a flow chart of another method for early warning of high exhaust pressure of a steam turbine intermediate pressure cylinder, such as Figure 3 As shown, taking the pressure safety warning value as 0.9 and the valve opening value as 1.05 as an example, specifically, by obtaining multiple measured pressures of multiple exhaust pressure measuring points corresponding to the steam turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder, and pre-processing the multiple measured pressures and atmospheric pressure to eliminate bad data, the exhaust absolute pressure of the steam turbine intermediate pressure cylinder is calculated, and then combined with the reference exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition, the pressure safety factor of the steam turbine intermediate pressure cylinder is calculated, so as to judge whether the pressure safety factor is Greater than 0.9. If it is less than or equal to 0.9, no warning will be given. If it is greater than 0.9, a warning will be given. After the pressure safety factor is greater than 0.9 and a warning is given, a secondary judgment of the pressure safety factor is required to determine whether the pressure safety factor is greater than 1.05. When the pressure safety factor is less than or equal to 1.05, the valve opening (LV) of the medium and low pressure connecting pipes is slowly opened at the first control speed and the valve opening is increased to the preset value. When the pressure safety factor is greater than 1.05, the valve opening (LV) of the medium and low pressure connecting pipes is quickly opened at the second control speed and the valve opening is increased to the preset value.

[0061] In addition, if Figure 3As shown, after completing the above-mentioned control action, continue to judge whether the pressure safety factor is greater than 0.9. If it is greater than 0.9, continue to warn, and continue to make a second judgment on the pressure safety factor to judge whether the pressure safety factor is greater than 1.05. When the pressure safety factor is less than or equal to 1.05, slowly open the valve opening (LV) of the medium and low pressure connecting pipe at the first control speed and open the valve opening to the preset value. When the pressure safety factor is greater than 1.05, quickly open the valve opening (LV) of the medium and low pressure connecting pipe at the second control speed and open the valve opening to the preset value until the pressure safety factor is less than 0.9 and stop the warning.

[0062] The preset value for widening the valve opening may be 5%, but is not limited thereto.

[0063] In addition, in order to more clearly describe the present application, the present application also provides a structural block diagram of a steam turbine intermediate pressure cylinder exhaust pressure high warning system, which can be used to execute any of the above-mentioned steam turbine intermediate pressure cylinder exhaust pressure high warning methods, such as Figure 4 As shown, the system includes a data preprocessing module 401 , a pressure coefficient calculation module 402 , a judgment module 403 and a control module 404 .

[0064] Specifically, if Figure 4 As shown, the data preprocessing module 401 is used to process the average measured pressure P2 of multiple measured pressures of the turbine intermediate pressure cylinder exhaust pressure measuring points arranged at the outlet of the turbine intermediate pressure cylinder and the atmospheric pressure P1 measuring point to determine the exhaust absolute pressure P3 of the turbine intermediate pressure cylinder and transmit the exhaust absolute pressure P3 to the pressure coefficient calculation module 402. The pressure coefficient calculation module 402 calculates the pressure safety factor K of the turbine intermediate pressure cylinder based on the reference exhaust absolute pressure P0 and the exhaust absolute pressure P3 corresponding to the intermediate pressure cylinder under the fully open valve operating condition of the turbine. The pressure safety factor K is then transmitted to the judgment module 403. The judgment module 403 controls the monitoring system corresponding to the turbine to issue an early warning based on the comparison result of the pressure safety factor K with a preset pressure safety early warning value. Finally, the control module 404 controls the early warning result of the judgment module 403 by controlling the valve opening value of the intermediate and low pressure connecting pipe between the intermediate pressure cylinder and the low pressure cylinder of the turbine to ensure safe and stable operation of the turbine intermediate pressure cylinder.

[0065] Figure 5 It is a structural schematic diagram of a steam turbine intermediate pressure cylinder exhaust high pressure early warning system provided in an embodiment of the present application.

[0066] like Figure 5 As shown, the steam turbine intermediate pressure cylinder exhaust high pressure warning system 500 includes a determination module 501, a calculation module 502 and a warning module 503, wherein:

[0067] The determination module 501 is used to determine the exhaust absolute pressure of the steam turbine intermediate pressure cylinder according to multiple measured pressures of multiple exhaust pressure measurement points corresponding to the steam turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder.

[0068] The calculation module 502 is used to calculate the pressure safety factor of the intermediate pressure cylinder of the steam turbine based on the reference exhaust absolute pressure and the exhaust absolute pressure corresponding to the intermediate pressure cylinder under the fully open valve working condition of the steam turbine.

[0069] The early warning module 503 is used to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning according to the comparison result of the pressure safety factor and the preset pressure safety early warning value.

[0070] The present application proposes a high early warning system for the exhaust steam pressure of the intermediate pressure cylinder of a steam turbine. The exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine is determined based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine. The pressure safety factor of the intermediate pressure cylinder of the steam turbine is calculated based on the reference exhaust absolute pressure and the exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition. According to the comparison result of the pressure safety factor and the preset pressure safety early warning value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to issue an early warning. Thus, based on the pressure safety factor of the intermediate pressure cylinder of the steam turbine, a real-time early warning of the exhaust steam pressure of the intermediate pressure cylinder of the steam turbine is achieved to ensure the safe operation of the steam turbine.

[0071] In one embodiment of the present application, Figure 6 FIG. 1 is a structural diagram of another steam turbine intermediate pressure cylinder exhaust pressure high warning system provided in an embodiment of the present application, such as Figure 6 As shown, the turbine intermediate pressure cylinder exhaust high pressure warning system 600 may further include: a determination module 601, a calculation module 602 and a warning module 603, wherein the warning module includes a first control unit 6031, a second control unit 6032, an acquisition unit 6033 and a third control unit 6034.

[0072] For detailed description of the determination module 601, the calculation module 602 and the warning module 603, please refer to Figure 5 The description of the determination module 501, the calculation module 502 and the early warning module 503 in the illustrated embodiment will not be described here.

[0073] In one embodiment of the present application, Figure 6 , determining module 601, specifically for:

[0074] A plurality of measured pressures of a plurality of exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine are collected, and an average value of the plurality of measured pressures is used as an average measured pressure corresponding to the intermediate pressure cylinder of the steam turbine.

[0075] The sum of the average measured pressure and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine is taken as the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine.

[0076] In one embodiment of the present application, Figure 6 , the early warning module 603 includes:

[0077] The first control unit 6031 is used to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to operate normally without issuing an early warning when the pressure safety factor is less than or equal to a preset pressure safety early warning value.

[0078] The second control unit 6032 is used to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning when the pressure safety factor is greater than a preset pressure safety early warning value.

[0079] In one embodiment of the present application, Figure 6 , the early warning module 603 further includes:

[0080] The acquisition unit 6033 is used to obtain the valve opening value of the medium- and low-pressure connecting pipe between the medium-pressure cylinder and the low-pressure cylinder in the steam turbine.

[0081] The third control unit 6034 is used to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to regulate the valve opening value of the intermediate and low pressure connecting pipe based on the comparison result of the valve opening value and the pressure safety factor.

[0082] In one embodiment of the present application, Figure 6 The third control unit 6034 is specifically configured to:

[0083] When the pressure safety factor is less than or equal to the valve opening value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to regulate the valve opening value of the intermediate and low pressure connecting pipes at a first regulation speed, and calculates the target pressure safety factor after regulation, and stops regulation until the target pressure safety factor is less than or equal to the preset pressure safety warning value.

[0084] When the pressure safety factor is greater than the valve opening value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to regulate the valve opening value of the intermediate and low pressure connecting pipes at a second control speed, and calculates the target pressure safety factor after regulation until the target pressure safety factor is less than or equal to the preset pressure safety warning value, and the regulation is stopped when the second control speed is much greater than the first control speed.

[0085] The present application proposes a high early warning system for the exhaust steam pressure of the intermediate pressure cylinder of a steam turbine. The exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine is determined based on multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine. The pressure safety factor of the intermediate pressure cylinder of the steam turbine is calculated based on the reference exhaust absolute pressure and the exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under the fully open valve working condition. According to the comparison result of the pressure safety factor and the preset pressure safety early warning value, the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine is controlled to issue an early warning. Thus, based on the pressure safety factor of the intermediate pressure cylinder of the steam turbine, a real-time early warning of the exhaust steam pressure of the intermediate pressure cylinder of the steam turbine is achieved to ensure the safe operation of the steam turbine.

[0086] like Figure 7 , which is a block diagram of an electronic device according to an embodiment of the present application.

[0087] like Figure 7 As shown, the electronic device includes:

[0088] Memory 701 , processor 702 , and computer instructions stored in the memory 701 and executable on the processor 702 .

[0089] When the processor 702 executes the instruction, the method for early warning of high exhaust pressure of the intermediate pressure cylinder of the steam turbine provided in the above embodiment is implemented.

[0090] Furthermore, the electronic device further includes:

[0091] The communication interface 703 is used for communication between the memory 701 and the processor 702 .

[0092] The memory 701 is used to store computer instructions that can be executed on the processor 702 .

[0093] The memory 701 may include a high-speed RAM memory, and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.

[0094] The processor 702 is configured to implement the above-described method for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine when executing a program.

[0095] If the memory 701, processor 702, and communication interface 703 are implemented independently, the communication interface 703, memory 701, and processor 702 can be interconnected via a bus to communicate with each other. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be divided into address buses, data buses, control buses, etc. For ease of representation, Figure 7 Only one thick line is used in the diagram, but this does not mean that there is only one bus or one type of bus.

[0096] Optionally, in a specific implementation, if the memory 701, the processor 702 and the communication interface 703 are integrated on a chip, the memory 701, the processor 702 and the communication interface 703 can communicate with each other through an internal interface.

[0097] The processor 702 may be a central processing unit (CPU), an application specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application.

[0098] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0099] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0100] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for early warning of high exhaust pressure of an intermediate pressure cylinder of a steam turbine, characterized in that: The method comprises: determining the exhaust absolute pressure of the steam turbine intermediate pressure cylinder according to a plurality of measured pressures at a plurality of exhaust pressure measuring points corresponding to the steam turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder; Calculating a pressure safety factor of the intermediate pressure cylinder of the steam turbine based on a reference exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under a fully open valve operating condition and the exhaust absolute pressure; According to the comparison result of the pressure safety factor and the preset pressure safety warning value, controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning; The controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning according to the comparison result of the pressure safety factor and the preset pressure safety early warning value includes: When the pressure safety factor is less than or equal to a preset pressure safety warning value, controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to operate normally without warning; When the pressure safety factor is greater than a preset pressure safety warning value, controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning; After controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning when the pressure safety factor is greater than a preset pressure safety early warning value, the method further includes: Obtaining a valve opening value of a medium- and low-pressure connecting pipe between a medium-pressure cylinder and a low-pressure cylinder in the steam turbine; Based on the comparison result of the valve opening value and the pressure safety factor, controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to regulate the valve opening value of the intermediate and low pressure connecting pipe; The controlling the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to regulate the valve opening value of the intermediate and low pressure connecting pipe based on the comparison result of the valve opening value and the pressure safety factor includes: When the pressure safety factor is less than or equal to the valve opening value, controlling the monitoring system corresponding to the steam turbine intermediate pressure cylinder to regulate the valve opening value of the intermediate and low pressure connecting pipe at a first regulation speed, and calculating a target pressure safety factor after regulation, and stopping regulation until the target pressure safety factor is less than or equal to a preset pressure safety warning value; When the pressure safety factor is greater than the valve opening value, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to regulate the valve opening value of the intermediate and low pressure connecting pipe at a second regulation speed, and the target pressure safety factor after regulation is calculated until the target pressure safety factor is less than or equal to the preset pressure safety warning value, and the regulation is stopped when the second regulation speed is much greater than the first regulation speed.

2. The method according to claim 1, wherein Determining the exhaust absolute pressure of the steam turbine intermediate pressure cylinder according to a plurality of measured pressures at a plurality of exhaust pressure measuring points corresponding to the steam turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder comprises: Collecting multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine, and taking the average value of the multiple measured pressures as the average measured pressure corresponding to the intermediate pressure cylinder of the steam turbine; The sum of the average measured pressure and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine is used as the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine.

3. A steam turbine intermediate pressure cylinder exhaust high pressure early warning system, characterized in that: The system comprises: a determination module, configured to determine the exhaust absolute pressure of the steam turbine intermediate pressure cylinder according to a plurality of measured pressures at a plurality of exhaust pressure measurement points corresponding to the steam turbine intermediate pressure cylinder and the atmospheric pressure corresponding to the steam turbine intermediate pressure cylinder; a calculation module, configured to calculate a pressure safety factor of the intermediate pressure cylinder of the steam turbine based on a reference exhaust absolute pressure corresponding to the intermediate pressure cylinder of the steam turbine under a fully open valve operating condition and the exhaust absolute pressure; an early warning module, configured to control a monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning based on a comparison result of the pressure safety factor and a preset pressure safety early warning value; The early warning module includes: a first control unit, configured to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to operate normally without issuing an early warning when the pressure safety factor is less than or equal to a preset pressure safety early warning value; a second control unit, configured to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to issue an early warning when the pressure safety factor is greater than a preset pressure safety early warning value; The early warning module further includes: an acquisition unit, configured to acquire a valve opening value of a medium-pressure and low-pressure connecting pipe between a medium-pressure cylinder and a low-pressure cylinder in the steam turbine; a third control unit, configured to control the monitoring system corresponding to the intermediate pressure cylinder of the steam turbine to regulate the valve opening value of the intermediate and low pressure connecting pipe based on a comparison result of the valve opening value and the pressure safety factor; The third control unit is specifically configured to: When the pressure safety factor is less than or equal to the valve opening value, controlling the monitoring system corresponding to the steam turbine intermediate pressure cylinder to regulate the valve opening value of the intermediate and low pressure connecting pipe at a first regulation speed, and calculating a target pressure safety factor after regulation, and stopping regulation until the target pressure safety factor is less than or equal to a preset pressure safety warning value; When the pressure safety factor is greater than the valve opening value, the monitoring system corresponding to the steam turbine intermediate pressure cylinder is controlled to regulate the valve opening value of the intermediate and low pressure connecting pipe at a second regulation speed, and the target pressure safety factor after regulation is calculated until the target pressure safety factor is less than or equal to the preset pressure safety warning value, and the regulation is stopped when the second regulation speed is much greater than the first regulation speed.

4. The system according to claim 3, wherein: The determining module is specifically configured to: Collecting multiple measured pressures of multiple exhaust pressure measuring points corresponding to the intermediate pressure cylinder of the steam turbine, and taking the average value of the multiple measured pressures as the average measured pressure corresponding to the intermediate pressure cylinder of the steam turbine; The sum of the average measured pressure and the atmospheric pressure corresponding to the intermediate pressure cylinder of the steam turbine is used as the exhaust absolute pressure of the intermediate pressure cylinder of the steam turbine.

5. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 2 when executing the program.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 2 is implemented.

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