CN112392554B - Steam supply control method, device and system for steam turbine shaft seal and computer equipment - Google Patents
Steam supply control method, device and system for steam turbine shaft seal and computer equipment Download PDFInfo
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- CN112392554B CN112392554B CN202011277614.6A CN202011277614A CN112392554B CN 112392554 B CN112392554 B CN 112392554B CN 202011277614 A CN202011277614 A CN 202011277614A CN 112392554 B CN112392554 B CN 112392554B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
- F01D11/02—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type
- F01D11/04—Preventing or minimising internal leakage of working-fluid, e.g. between stages by non-contact sealings, e.g. of labyrinth type using sealing fluid, e.g. steam
- F01D11/06—Control thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/003—Arrangements for testing or measuring
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- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The application relates to a steam turbine shaft seal steam supply control method, a device, a system, computer equipment and a storage medium, comprising the following steps: the method comprises the steps that a steam supply control request for the steam turbine shaft seal is responded, and current steam parameters of the steam turbine shaft seal are obtained through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal; determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters; generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted; sending a steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameters of the steam turbine shaft seal to achieve the target steam parameters according to the steam turbine shaft seal steam supply control instruction. This application can adjust according to the actual behavior of steam turbine bearing seal, has improved the control efficiency that steam turbine bearing seal supplied vapour adjustment and the precision that steam turbine bearing seal supplied vapour control.
Description
Technical Field
The application relates to the technical field of steam turbine unit control, in particular to a steam turbine shaft seal steam supply control method, a steam turbine shaft seal steam supply control device, a steam turbine shaft seal steam supply control system, computer equipment and a storage medium.
Background
In the working process of a steam turbine unit, measures of increasing the initial pressure of steam and reducing the back pressure are generally adopted to improve the heat efficiency of the unit. When the unit operates under high load, the high-medium pressure shaft seal can seal the steam of the high-medium pressure cylinder without leakage, and the low-pressure shaft seal does not suck air into the cylinder body, so that the unit efficiency is improved; however, when the unit is in low load or the start-stop unit is running, shaft seal steam needs to supply steam to the high, medium and low pressure shaft seals at the same time, and isolated air enters the cylinder body to protect the normal operation of the steam turbine.
At present, a gas turbine double-shaft combined cycle unit is widely applied, the starting and stopping times of the unit are more frequent than those of a coal-electric unit, but the existing steam turbine shaft seal steam supply control mode can not respond immediately according to the real-time condition and can not give consideration to the dual requirements of efficiency and safety; therefore, the efficiency of controlling the steam supply of the steam turbine shaft seal is low.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method, an apparatus, a system, a computer device and a storage medium for controlling steam supply to a steam turbine shaft seal, which can improve efficiency of controlling steam supply to the steam turbine shaft seal.
A steam supply control method for a steam turbine shaft seal comprises the following steps:
responding to a steam supply control request aiming at the steam turbine shaft seal, and acquiring current steam parameters of the steam turbine shaft seal through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain the current steam parameter;
determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters;
generating a corresponding steam turbine shaft seal steam supply control instruction according to the steam parameter to be adjusted;
sending the steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameter of the steam turbine shaft seal to reach the target steam parameter according to the steam turbine shaft seal steam supply control instruction.
In one embodiment, before acquiring the current steam parameter of the steam turbine shaft seal through a preset sensor group in response to a steam supply control request for the steam turbine shaft seal, the method further includes:
receiving a steam turbine shaft seal steam supply control request sent by a control terminal;
and analyzing the steam supply control request of the steam turbine shaft seal to obtain a target working mode identifier of the steam turbine.
In one embodiment, before determining the steam parameter to be adjusted of the steam turbine shaft seal according to the current steam parameter and a predetermined target steam parameter, the method further includes:
and determining steam parameters matched with the target working mode identification from a preset database according to the target working mode identification, wherein the steam parameters are used as the predetermined target steam parameters.
In one embodiment, the steam parameters include temperature information and pressure information;
the step of determining the steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and the predetermined target steam parameters comprises the following steps:
acquiring current temperature information and current pressure information from the current steam parameters;
acquiring target temperature information and target pressure information from the target steam parameters;
determining temperature difference information according to the target temperature information and the current temperature information, and determining pressure difference information according to the target pressure information and the current pressure information;
and respectively taking the temperature difference information and the pressure difference information as the steam parameter difference to be adjusted.
In one embodiment, the generating a corresponding steam turbine shaft seal steam supply control instruction according to the steam parameter to be adjusted includes:
determining steam turbine valve control parameters matched with the temperature difference information and the pressure difference information; the steam turbine valve control parameters are used for determining the opening and closing degrees of a plurality of steam turbine valves;
and generating the steam supply control instruction of the steam turbine shaft seal according to the control parameters of the steam turbine valve.
In one embodiment, after sending the steam supply control command for the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal, the method further includes:
receiving valve action detection data sent by a feedback terminal; the feedback terminal is used for detecting the action of the steam turbine valve to obtain valve action detection data;
and determining the execution result of the steam supply control instruction of the steam turbine shaft seal according to the valve action detection data.
A steam turbine shaft seal steam supply control device, the device comprising:
the request response module is used for responding to a steam supply control request for the steam turbine shaft seal and acquiring the current steam parameters of the steam turbine shaft seal through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain the current steam parameter;
the parameter determining module is used for determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters;
the instruction generating module is used for generating a corresponding steam turbine shaft seal steam supply control instruction according to the steam parameter to be adjusted;
the instruction sending module is used for sending the steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameter of the steam turbine shaft seal to reach the target steam parameter according to the steam turbine shaft seal steam supply control instruction.
A steam turbine valve control system, the system comprising: the system comprises a server, a control terminal and a preset sensor group; the preset sensor group is installed inside the steam turbine shaft seal, and the server is in communication connection with the control terminal and the preset sensor group;
the preset sensor group is used for monitoring the internal environment of the steam turbine shaft seal to obtain the current steam parameter;
the server is used for responding to a steam supply control request aiming at the steam turbine shaft seal and acquiring the current steam parameters of the steam turbine shaft seal through a preset sensor group; determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters; generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted; sending the steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal;
the control terminal is used for adjusting the current steam parameter of the steam turbine shaft seal to reach the target steam parameter according to the steam turbine shaft seal steam supply control instruction.
A computer device comprising a memory and a processor, the memory storing a computer program, the processor implementing the following steps when executing the computer program:
responding to a steam supply control request aiming at the steam turbine shaft seal, and acquiring current steam parameters of the steam turbine shaft seal through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain the current steam parameter;
determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters;
generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted;
sending the steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameter of the steam turbine shaft seal to reach the target steam parameter according to the steam turbine shaft seal steam supply control instruction.
A computer-readable storage medium, on which a computer program is stored which, when executed by a processor, carries out the steps of:
responding to a steam supply control request aiming at the steam turbine shaft seal, and acquiring current steam parameters of the steam turbine shaft seal through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain the current steam parameter;
determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters;
generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted;
sending the steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameter of the steam turbine shaft seal to reach the target steam parameter according to the steam turbine shaft seal steam supply control instruction.
The steam supply control method, the device, the system, the computer equipment and the storage medium for the steam turbine shaft seal comprise the following steps: the method comprises the steps that a steam supply control request for the steam turbine shaft seal is responded, and current steam parameters of the steam turbine shaft seal are obtained through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain current steam parameters; determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters; generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted; sending a steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameters of the steam turbine shaft seal to achieve the target steam parameters according to the steam turbine shaft seal steam supply control instruction. According to the steam turbine steam supply adjusting method and device, the current steam parameters of the steam turbine shaft seal are obtained through the preset sensor group arranged in the shaft seal, the corresponding control instructions are generated according to the target steam parameters, adjustment can be carried out according to the actual operation condition of the steam turbine shaft seal, and the control efficiency of steam turbine shaft seal steam supply adjustment is improved; meanwhile, a corresponding steam turbine shaft seal steam supply control instruction is generated according to the steam parameter difference value to be adjusted, and the steam turbine shaft seal steam supply control precision is improved.
Drawings
FIG. 1 is a diagram illustrating an exemplary embodiment of a method for controlling steam supply to a shaft seal of a steam turbine;
FIG. 2 is a schematic flow chart illustrating a method for controlling steam supply to a seal of a steam turbine according to an embodiment;
FIG. 3 is a flowchart illustrating the step of obtaining a target operating mode identifier for the steam turbine in one embodiment;
FIG. 4 is a schematic flow chart illustrating the step of determining steam parameters to be adjusted for the steam turbine shaft seal according to one embodiment;
FIG. 5 is a flow chart illustrating steps of generating corresponding steam turbine shaft seal steam supply control commands according to an embodiment;
FIG. 6 is a flowchart illustrating steps for determining a result of executing a steam supply control command for a steam turbine shaft seal according to an embodiment;
FIG. 7 is a schematic diagram illustrating a method for controlling steam supply to a shaft seal of a steam turbine according to an embodiment;
FIG. 8 is a block diagram of a steam supply control device for a steam turbine shaft seal according to an embodiment;
FIG. 9 is a diagram illustrating an internal structure of a computer device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
The steam turbine shaft seal steam supply control method provided by the application can be applied to the application environment shown in fig. 1. The preset sensor group 11 and the control terminal 12 are in communication with the server 13 through a network or an electrical connection, the control terminal 12 is respectively connected with each control component of the steam turbine shaft seal and used for controlling the corresponding control component to act according to a steam turbine shaft seal steam supply control instruction sent by the server 13, and the preset sensor group 11 is used for monitoring the internal environment of the steam turbine shaft seal. Specifically, the server 13 responds to a steam supply control request for the steam turbine shaft seal, and obtains current steam parameters of the steam turbine shaft seal through the preset sensor group 11; the preset sensor group 11 is installed inside the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain current steam parameters; the server 13 determines steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters; the server 13 generates a corresponding steam turbine shaft seal steam supply control instruction according to the steam parameter to be adjusted; the server 13 sends a steam supply control instruction of the steam turbine shaft seal to the control terminal 12 corresponding to the steam turbine shaft seal; the control terminal 12 is configured to adjust a current steam parameter of the steam turbine shaft seal to reach a target steam parameter according to a steam supply control instruction of the steam turbine shaft seal.
The control terminal 12 may be, but is not limited to, various industrial control devices or systems, such as various PID control devices (regulator control law is proportional, integral, and derivative control); the server 104 may be implemented as a stand-alone server or a server cluster comprised of multiple servers.
In one embodiment, as shown in fig. 2, a steam supply control method for a steam turbine shaft seal is provided, which is described by taking the method as an example of the terminal in fig. 1, and includes the following steps:
The steam supply control request can be generated and sent by workers through various mobile phones, computers, panels, control devices and the like and is used for requesting various control operations on the steam turbine shaft seal system; or a regulation and control request which is actively generated and sent by a corresponding monitoring device when detecting that a certain index or parameter does not meet or exceed a set standard. The preset sensor group comprises various industrial sensors, comprises a temperature sensor, a pressure sensor, a humidity sensor and the like, and also comprises camera equipment, radar equipment, infrared detection equipment and the like, so that the preset sensors can simultaneously monitor steam parameters inside the steam turbine shaft seal system and environmental parameters outside the steam turbine shaft seal system.
Specifically, after receiving a steam supply control request for a steam turbine shaft seal sent by a corresponding control terminal, a monitoring terminal or a terminal held by a worker and the like, analyzing the steam supply control request to obtain a data type identifier to be acquired; calling one or more corresponding sensors in a preset sensor group according to the data type identification to carry out detection so as to obtain a detection result; and obtaining the current steam parameters according to the detection result.
The method comprises the following steps of responding to a steam supply control request for the steam turbine shaft seal, acquiring required data according to the content of the request, and generating current steam parameters; the efficiency of data acquisition required by steam supply control of the steam turbine shaft seal is improved.
And step 22, determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and the predetermined target steam parameters.
In particular, the current steam parameter and the predetermined target steam parameter may be a parameter set consisting of one or more indicators, e.g. the target steam parameter comprises steam temperature, steam pressure; the target steam parameter is one of production environment parameters that should be maintained when the steam turbine shaft seal system of the steam turbine executes corresponding work content, and the steam parameter may be a specific value or a range, for example, the production environment requires that the high-pressure shaft seal steam temperature is increased to 205 ℃ or above, the target steam parameter may be set to 210 ℃, or may be set to a temperature range of 206 ℃ to 210 ℃.
The steam parameter to be adjusted is a difference value between a target steam parameter and a current steam parameter, such as a steam pressure difference value, a steam temperature difference value and the like.
The server can acquire target steam parameters corresponding to the working mode according to the current working mode of the steam turbine; and then determining the difference value of each specific parameter according to the target steam parameter and the current steam parameter, and obtaining the steam parameter to be adjusted of the steam turbine shaft seal according to the difference value. The target steam parameters can be obtained by sending an application instruction to a terminal held by a worker, so that the worker inputs values of various parameters according to the instruction to generate the target steam parameters.
The method comprises the following steps of determining steam parameters to be adjusted of the steam turbine shaft seal by obtaining predetermined target steam parameters, so as to determine the parameters to be adjusted of the steam turbine shaft seal and a specific adjustment range; manual intervention is not needed, and the control efficiency of steam supply adjustment of the steam turbine shaft seal is improved.
And step 23, generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted.
Specifically, the server respectively obtains various parameter values to be adjusted and control terminals corresponding to the parameter values from steam parameters to be adjusted, and generates corresponding steam turbine shaft seal steam supply control instructions according to the parameter values and the types of the control terminals; and the corresponding steam turbine shaft seal steam supply control instruction can be generated according to the type of the control terminal, the data transmission mode, the instruction analysis mode and the like. If the control terminal is a control system consisting of a plurality of control terminals, a steam turbine shaft seal steam supply control instruction adaptive to the control system can be generated according to steam parameters to be adjusted, the control system sends the steam turbine shaft seal steam supply control instruction to each control terminal connected with the control system, and returns an instruction sending result and an execution result.
For example, the server obtains the high-pressure shaft seal temperature from the steam parameters to be adjusted, which is now 210 ℃, and needs to be adjusted to be lower than 205 ℃, the server calculates the valve adjustment parameter according to the high-pressure shaft seal temperature difference, generates a steam supply control instruction for the steam turbine shaft seal according to the valve adjustment parameter, and sends the steam supply control instruction to the shaft seal overflow valve control terminal, so that the shaft seal overflow valve control terminal adjusts the opening and closing degree of the shaft seal overflow valve according to the steam supply control instruction for the steam turbine shaft seal, and the effect of reducing the high-pressure shaft seal temperature is achieved.
In this step, the server may generate a corresponding steam turbine shaft seal steam supply control instruction according to the steam parameter to be adjusted, the control terminal, and the like, so as to adjust the steam parameter, and improve the control efficiency of steam turbine shaft seal steam supply adjustment and the precision of steam turbine shaft seal steam supply control.
Specifically, the steam turbine shaft seal steam supply control instruction further comprises time information, so that the control terminal can execute the instruction after receiving the preset time of the steam turbine shaft seal steam supply control instruction; the steam turbine shaft seal steam supply control instruction further comprises a result receiving object identifier, and the control terminal can send an instruction execution result to a corresponding terminal according to the result receiving object identifier.
After executing a steam supply control instruction of the steam turbine shaft seal, the control terminal can call corresponding monitoring equipment to monitor and judge whether the current steam parameter reaches a target steam parameter; if the target steam parameter requirement cannot be obtained after multiple and long-time trials, early warning information can be generated to enable relevant personnel to follow up the situation.
The server can generate and store a corresponding steam turbine shaft seal steam supply control log according to the instruction execution condition and other information, and periodically sends the log to the preset terminal through mails, files and other forms.
The current steam parameters are adjusted by a steam turbine shaft seal steam supply control instruction control terminal to achieve the target steam parameters; the adjustment can be carried out according to the actual running condition of the steam turbine shaft seal, and the control efficiency of steam supply adjustment of the steam turbine shaft seal is improved.
The steam supply control method for the steam turbine shaft seal comprises the following steps: the method comprises the steps that a steam supply control request for the steam turbine shaft seal is responded, and current steam parameters of the steam turbine shaft seal are obtained through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain current steam parameters; determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters; generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted; sending a steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameters of the steam turbine shaft seal to achieve the target steam parameters according to the steam turbine shaft seal steam supply control instruction. According to the method and the device, the current steam parameters of the steam turbine shaft seal are obtained through the preset sensor group arranged in the shaft seal, the corresponding control instruction is generated according to the target steam parameters, the adjustment can be carried out according to the actual operation condition of the steam turbine shaft seal, and the control efficiency of the steam supply adjustment of the steam turbine shaft seal is improved; meanwhile, a corresponding steam turbine shaft seal steam supply control instruction is generated according to the steam parameter difference value to be adjusted, and the steam turbine shaft seal steam supply control precision is improved.
In one embodiment, as shown in fig. 3, before acquiring the current steam parameter of the steam turbine shaft seal through the preset sensor group in response to the steam supply control request for the steam turbine shaft seal, the method further includes:
and 32, analyzing the steam supply control request of the steam turbine shaft seal to obtain the target working mode identification of the steam turbine.
Specifically, the control terminal generates a steam turbine shaft seal steam supply control request according to the target working mode, and the server can determine target steam parameters which the steam turbine should have in the target working mode according to the target working mode identification. The target working mode comprises a currently adopted mode and a working mode to be switched to later; the current or later working plan state of the steam turbine can be determined through the target working mode identification.
In the embodiment, the target working mode identifier of the steam turbine is determined by analyzing the steam supply control request of the shaft seal of the steam turbine so as to master the target steam parameters and the working arrangement condition of the steam turbine.
In one embodiment, before determining the steam parameter to be adjusted of the steam turbine shaft seal according to the current steam parameter and the predetermined target steam parameter, the method further includes: and according to the target working mode identifier, determining the steam parameters matched with the target working mode identifier from a preset database as the predetermined target steam parameters.
Specifically, the preset database has steam parameters matched with the target working mode identifier, and the target values of the steam parameters in different working modes can be obtained through the matching corresponding relation between the target working mode identifier and the steam parameters, so that the steam parameters can be adjusted conveniently.
The steam parameters matched with the target working mode identification can be updated by collecting the steam parameters of the steam turbine in the target working mode.
According to the steam turbine shaft seal steam supply control method and device, the steam parameters matched with the target working mode identification are determined from the preset database, and the steam turbine shaft seal steam supply control precision is improved.
In one embodiment, the steam parameters include temperature information and pressure information; as shown in fig. 4, determining the steam parameter to be adjusted of the steam turbine shaft seal according to the current steam parameter and the predetermined target steam parameter includes:
and step 44, respectively taking the temperature difference information and the pressure difference information as steam parameter differences to be adjusted.
Specifically, the steam parameter to be adjusted of the steam turbine shaft seal mainly includes steam temperature and steam pressure information, so that a specific numerical value amplitude to be adjusted can be obtained by respectively calculating differences between current pressure information and temperature information and target pressure information and temperature information and is used as the steam parameter difference to be adjusted. In the actual adjusting process, the steam parameter difference is mainly completed by controlling the opening and closing degree of the valve, so that the opening and closing degree of the corresponding valve can be calculated according to the steam parameter difference.
The server may perform a data check on the current steam parameters, and provide data of significantly bad quality and large deviation by comparison with historical data.
In the embodiment, the difference values of pressure and temperature in the current steam parameter and the target steam parameter are calculated to respectively obtain temperature difference value information and pressure difference value information, and then the steam parameter difference value to be adjusted is obtained according to the difference value information; the difference between the current steam parameter and the target steam parameter is determined, and the steam supply control precision of the steam turbine shaft seal is improved.
In one embodiment, as shown in fig. 5, generating a corresponding steam turbine shaft seal steam supply control command according to the steam parameter to be adjusted includes:
and step 52, generating a steam supply control instruction of the steam turbine shaft seal according to the control parameters of the steam turbine valve.
Specifically, the opening and closing degree refers to the size of the valve movement, and is not limited to various control forms such as left and right opening and closing, up and down opening and closing, and any expression form that can make the valve act for a certain distance can be used as the opening and closing degree. The valve control parameters are the corresponding relations between the difference information and the steam turbine valve control parameters stored in a valve opening and closing preset database, and the corresponding steam turbine valve control parameters of the difference information are different under different numerical levels; for example, when the temperature of the high-pressure shaft seal steam is reduced from 210 ℃ to 205 ℃, the temperature difference information is 5 ℃, the valve may need to be controlled to be opened by 10% on the original basis, but when the temperature of the high-pressure shaft seal steam is reduced from 220 ℃ to 215 ℃, the temperature difference information is also 5 ℃, the valve may need to be controlled to be opened by 5% on the original basis; therefore, under the condition that the difference information is the same, different values of the starting point can be matched with different steam turbine valve control parameters; thus, the steam turbine valve control parameter and the difference information are actively matched states.
This embodiment is through obtaining and difference information assorted steam turbine valve control parameter and generating steam turbine bearing seal and supply vapour control command for easily control terminal, improved the control efficiency that steam turbine bearing seal supplied vapour to adjust.
In one embodiment, as shown in fig. 6, after sending the steam supply control command for the steam turbine shaft seal to the control terminal corresponding to the steam turbine shaft seal, the method further includes:
and step 62, determining an execution result of the steam supply control instruction of the steam turbine shaft seal according to the valve action detection data.
Specifically, a special feedback terminal may be provided for monitoring the action condition of the valve after each control terminal executes the corresponding control instruction; the valve motion detection data may be the distance of the valve motion, a specific proportion of the motion, or other changed environmental factors after the motion, such as the size of the channel.
According to the valve action detection data obtained by the feedback terminal, whether each valve control terminal normally responds to the instruction or not can be determined; and secondly, the execution result of the steam supply control instruction of the steam turbine shaft seal can be determined through the valve action detection data, the current steam parameter of the steam turbine shaft seal is verified, whether the target steam parameter is reached is judged, and the control accuracy is improved.
According to the embodiment, the valve action detection data is obtained through the feedback terminal, the control result and the control effect are confirmed, and the control efficiency of steam supply adjustment of the steam turbine shaft seal and the steam supply control precision of the steam turbine shaft seal are improved.
In one embodiment, the steam pressure is regulated as an example:
when the steam turbine is in turning and low-load operation, a steam source of steam turbine shaft seal steam is provided by auxiliary steam, then enters the main shaft seal pipe through the steam supply pneumatic regulating valve, steam is supplied to the high-pressure shaft seal, the medium-pressure shaft seal and the low-pressure shaft seal respectively through the main shaft seal steam pipe, the steam pressure can be regulated by controlling the steam supply pneumatic regulating valve, the steam pressure supply of the main shaft seal pipe is ensured, and the steam pressure of the main shaft seal pipe is stabilized at 35mbar usually.
Similarly, when the steam turbine is in high-load operation, the shaft seal steam source overflows to the main pipe of the shaft seal from the high-pressure shaft seal and the medium-pressure shaft seal, wherein a part of steam is supplied to the low-pressure shaft seal, the surplus overflows to the gas condenser through the shaft seal overflow valve, the steam pressure can be adjusted by controlling the shaft seal overflow valve, and the pressure of the main pipe of the shaft seal is kept to be 35mbar under normal conditions.
In one embodiment, the adjustment of the steam temperature is taken as an example:
when the steam turbine is in high-load operation, a shaft seal steam gas source overflows to a shaft seal main pipe from a high-pressure shaft seal and a medium-pressure shaft seal, a part of steam is supplied to a low-pressure shaft seal, and the rest overflows to a gas condenser through a shaft seal overflow valve;
if the low-pressure shaft seal temperature of the steam turbine is higher than 330 ℃, the shaft seal overflow valve is controlled to be automatically opened, the pressure of the steam supply pneumatic regulating valve is stabilized, the steam flow flux is increased, and the low-pressure shaft seal temperature is reduced by adding auxiliary steam (the auxiliary steam temperature is stabilized at about 250 ℃), and the low-pressure shaft seal steam temperature is preferably reduced to below 330 ℃.
If the steam supply temperature of the shaft seal does not meet the condition that the steam inlet temperature of the shaft seal is lower than 230 ℃, the electric drain valve can be controlled to be automatically opened so as to improve the steam supply temperature of the shaft seal; when the steam supply temperature of the shaft seal is higher than 250 ℃, the electric drain valve is controlled to be automatically closed, and the heat efficiency and the safety of the unit are ensured.
In one embodiment, as shown in fig. 7, to facilitate understanding of the present application by those skilled in the art, a steam turbine shaft seal steam supply control method is provided to further explain the present application:
responding to a steam supply control request aiming at the steam turbine shaft seal sent by a terminal held by a worker, and acquiring current steam parameters of the steam turbine shaft seal through a preset sensor group, wherein the current steam parameters comprise shaft seal main pipe pressure, high-pressure shaft seal temperature, low-pressure shaft seal temperature and shaft seal air supply temperature; respectively acquiring target steam parameters corresponding to the current steam parameters according to the current working mode of the steam turbine, wherein the target steam parameters comprise a pressure setting parameter, a shaft seal temperature low setting parameter, a shaft seal temperature high setting parameter and an interlock switch setting temperature; according to the pressure of the main pipe of the shaft seal and the pressure setting parameter, determining a pressure valve control parameter through a shaft seal pressure PID module, and sending the pressure valve control parameter to a pneumatic steam supply regulating valve through a control terminal; determining a temperature valve control parameter through a shaft seal temperature PID module according to the high-pressure shaft seal temperature, the low-pressure shaft seal temperature, the shaft seal temperature low setting parameter and the shaft seal temperature high setting parameter, and sending the temperature valve control parameter to an overflow valve through a control terminal; determining control parameters of the electric drain valve according to the set temperature of the interlocking switch and the air supply temperature of the shaft seal and sending the control parameters to the electric drain valve through the control terminal; each valve receives the corresponding valve control parameter and then executes the corresponding instruction; and the feedback terminal acquires the action detection data and the steam parameter detection data of each valve and sends shaft seal main pipe pressure feedback information, high-pressure shaft seal temperature feedback information and low-pressure shaft seal temperature feedback information to the server.
It should be understood that although the various steps in the flow charts of fig. 2-6 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 2-6 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
In one embodiment, as shown in fig. 8, there is provided a steam supply control device for a steam turbine shaft seal, including: wherein:
the request response module 81 is used for responding to a steam supply control request for the steam turbine shaft seal and acquiring the current steam parameters of the steam turbine shaft seal through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain current steam parameters;
the parameter determining module 82 is configured to determine a steam parameter to be adjusted of the steam turbine shaft seal according to the current steam parameter and a predetermined target steam parameter;
the instruction generating module 83 is configured to generate a corresponding steam supply control instruction for the steam turbine shaft seal according to the steam parameter to be adjusted;
the instruction sending module 84 is configured to send a steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameters of the steam turbine shaft seal to achieve the target steam parameters according to the steam turbine shaft seal steam supply control instruction.
In one embodiment, the steam turbine shaft seal steam supply control device further comprises a request analysis module, which is used for receiving a steam turbine shaft seal steam supply control request sent by the control terminal; and analyzing the steam supply control request of the steam turbine shaft seal to obtain the target working mode identification of the steam turbine.
In one embodiment, the request parsing module is further configured to determine, according to the target working mode identifier, a steam parameter matching the target working mode identifier from a preset database as a predetermined target steam parameter.
In one embodiment, the parameter determination module 82 is further configured to obtain current temperature information and current pressure information from the current steam parameters; acquiring target temperature information and target pressure information from target steam parameters; determining temperature difference information according to the target temperature information and the current temperature information, and determining pressure difference information according to the target pressure information and the current pressure information; and respectively taking the temperature difference information and the pressure difference information as steam parameter differences to be adjusted.
In one embodiment, the command generating module 83 is further configured to determine a turbine valve control parameter matching the temperature difference information and the pressure difference information; the steam turbine valve control parameters are used for determining the opening and closing degrees of a plurality of steam turbine valves; and generating a steam supply control instruction of the steam turbine shaft seal according to the control parameters of the steam turbine valve.
In one embodiment, the steam turbine shaft seal steam supply control device further comprises a data feedback module for receiving valve action detection data sent by a feedback terminal; the feedback terminal is used for detecting the action of the steam turbine valve to obtain valve action detection data; and determining the execution result of the steam supply control instruction of the steam turbine shaft seal according to the valve action detection data.
For specific limitations of the steam turbine shaft seal steam supply control device, reference may be made to the above limitations of the steam turbine shaft seal steam supply control method, which will not be described herein again. All or part of each module in the steam turbine shaft seal steam supply control device can be realized by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, as shown in FIG. 1, there is provided a steam turbine valve control system comprising: the system comprises a server 13, a control terminal 12 and a preset sensor group 11; the preset sensor group 11 is installed inside a steam turbine shaft seal, and the server 13 is in communication connection with the control terminal 12 and the preset sensor group 11;
the preset sensor group 11 is used for monitoring the internal environment of the steam turbine shaft seal to obtain current steam parameters;
the server 13 is configured to obtain a current steam parameter of the steam turbine shaft seal through the preset sensor group 11 in response to a steam supply control request for the steam turbine shaft seal; determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters; generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted; sending a steam supply control instruction of the steam turbine shaft seal to a control terminal 12 corresponding to the steam turbine shaft seal;
the control terminal 12 is configured to adjust a current steam parameter of the steam turbine shaft seal to reach a target steam parameter according to a steam supply control instruction of the steam turbine shaft seal.
In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as shown in fig. 9. The computer device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the computer equipment is used for storing steam supply control data of the steam turbine shaft seal. The network interface of the computer device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to realize a steam supply control method for the steam turbine shaft seal.
Those skilled in the art will appreciate that the architecture shown in fig. 9 is merely a block diagram of some of the structures associated with the disclosed aspects and is not intended to limit the computing devices to which the disclosed aspects apply, as particular computing devices may include more or less components than those shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, a computer device is provided, comprising a memory and a processor, the memory having a computer program stored therein, the processor implementing the following steps when executing the computer program:
responding to a steam supply control request aiming at the steam turbine shaft seal, and acquiring current steam parameters of the steam turbine shaft seal through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain current steam parameters;
determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters;
generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted;
sending a steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameters of the steam turbine shaft seal to achieve the target steam parameters according to the steam turbine shaft seal steam supply control instruction.
In one embodiment, the processor, when executing the computer program, further performs the steps of: receiving a steam turbine shaft seal steam supply control request sent by a control terminal; and analyzing the steam supply control request of the steam turbine shaft seal to obtain the target working mode identification of the steam turbine.
In one embodiment, the processor, when executing the computer program, further performs the steps of: and according to the target working mode identifier, determining the steam parameters matched with the target working mode identifier from a preset database as the predetermined target steam parameters.
In one embodiment, the processor, when executing the computer program, further performs the steps of: the steam parameters comprise temperature information and pressure information; acquiring current temperature information and current pressure information from current steam parameters; acquiring target temperature information and target pressure information from target steam parameters; determining temperature difference information according to the target temperature information and the current temperature information, and determining pressure difference information according to the target pressure information and the current pressure information; and respectively taking the temperature difference information and the pressure difference information as steam parameter differences to be adjusted.
In one embodiment, the processor, when executing the computer program, further performs the steps of: determining steam turbine valve control parameters matched with the temperature difference information and the pressure difference information; the steam turbine valve control parameters are used for determining the opening and closing degrees of a plurality of steam turbine valves; and generating a steam supply control instruction of the steam turbine shaft seal according to the control parameters of the steam turbine valve.
In one embodiment, the processor, when executing the computer program, further performs the steps of: receiving valve action detection data sent by a feedback terminal; the feedback terminal is used for detecting the action of the steam turbine valve to obtain valve action detection data; and determining the execution result of the steam supply control instruction of the steam turbine shaft seal according to the valve action detection data.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
responding to a steam supply control request aiming at the steam turbine shaft seal, and acquiring current steam parameters of the steam turbine shaft seal through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain current steam parameters;
determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters;
generating a corresponding steam supply control instruction of the steam turbine shaft seal according to the steam parameter to be adjusted;
sending a steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameters of the steam turbine shaft seal to achieve the target steam parameters according to the steam turbine shaft seal steam supply control instruction.
In one embodiment, the computer program when executed by the processor further performs the steps of: receiving a steam turbine shaft seal steam supply control request sent by a control terminal; and analyzing the steam supply control request of the steam turbine shaft seal to obtain the target working mode identification of the steam turbine.
In one embodiment, the computer program when executed by the processor further performs the steps of: and according to the target working mode identifier, determining the steam parameters matched with the target working mode identifier from a preset database as the predetermined target steam parameters.
In one embodiment, the computer program when executed by the processor further performs the steps of: the steam parameters comprise temperature information and pressure information; acquiring current temperature information and current pressure information from current steam parameters; acquiring target temperature information and target pressure information from target steam parameters; determining temperature difference information according to the target temperature information and the current temperature information, and determining pressure difference information according to the target pressure information and the current pressure information; and respectively taking the temperature difference information and the pressure difference information as steam parameter differences to be adjusted.
In one embodiment, the computer program when executed by the processor further performs the steps of: determining steam turbine valve control parameters matched with the temperature difference information and the pressure difference information; the steam turbine valve control parameters are used for determining the opening and closing degrees of a plurality of steam turbine valves; and generating a steam supply control instruction of the steam turbine shaft seal according to the control parameters of the steam turbine valve.
In one embodiment, the computer program when executed by the processor further performs the steps of: receiving valve action detection data sent by a feedback terminal; the feedback terminal is used for detecting the action of the steam turbine valve to obtain valve action detection data; and determining the execution result of the steam supply control instruction of the steam turbine shaft seal according to the valve action detection data.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A steam supply control method for a steam turbine shaft seal is characterized by comprising the following steps:
responding to a steam supply control request aiming at the steam turbine shaft seal, and acquiring current steam parameters of the steam turbine shaft seal through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain the current steam parameter;
determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters; wherein the steam parameter to be adjusted is the difference value between the target steam parameter and the current steam parameter;
acquiring a steam turbine valve control parameter corresponding to the difference value information from a valve opening and closing preset database; the preset valve opening and closing database stores the corresponding relation between the difference information and the steam turbine valve control parameter, and the steam turbine valve control parameter is movably matched with the difference information;
generating a steam supply control instruction of the steam turbine shaft seal according to the control parameters of the steam turbine valve;
sending the steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameter of the steam turbine shaft seal to reach the target steam parameter according to the steam turbine shaft seal steam supply control instruction.
2. The method of claim 1, further comprising, prior to obtaining current steam parameters of the steam turbine shaft seal via a preset sensor set in response to a steam supply control request for the steam turbine shaft seal:
receiving a steam turbine shaft seal steam supply control request sent by a control terminal;
and analyzing the steam supply control request of the steam turbine shaft seal to obtain the target working mode identification of the steam turbine.
3. The method according to claim 2, before determining the steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and the predetermined target steam parameters, further comprising:
and determining steam parameters matched with the target working mode identification from a preset database according to the target working mode identification, wherein the steam parameters are used as the predetermined target steam parameters.
4. The method of claim 3, wherein the steam parameters include temperature information and pressure information;
the step of determining the steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and the predetermined target steam parameters comprises the following steps:
obtaining current temperature information and current pressure information from the current steam parameters;
acquiring target temperature information and target pressure information from the target steam parameters;
determining temperature difference information according to the target temperature information and the current temperature information, and determining pressure difference information according to the target pressure information and the current pressure information;
and respectively taking the temperature difference information and the pressure difference information as the steam parameter difference to be adjusted.
5. The method of claim 4, wherein the steam turbine valve control parameter is used to determine a degree of opening and closing of a plurality of steam turbine valves.
6. The method according to claim 5, further comprising, after sending the steam supply control command for the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal:
receiving valve action detection data sent by a feedback terminal; the feedback terminal is used for detecting the action of the steam turbine valve to obtain valve action detection data;
and determining the execution result of the steam supply control instruction of the steam turbine shaft seal according to the valve action detection data.
7. A steam turbine shaft seal steam supply control device is characterized in that the device comprises:
the request response module is used for responding to a steam supply control request for the steam turbine shaft seal and acquiring the current steam parameters of the steam turbine shaft seal through a preset sensor group; the preset sensor group is arranged in the steam turbine shaft seal and used for monitoring the internal environment of the steam turbine shaft seal to obtain the current steam parameter;
the parameter determining module is used for determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters; wherein the steam parameter to be adjusted is the difference value between the target steam parameter and the current steam parameter;
the instruction generation module is used for acquiring steam turbine valve control parameters corresponding to the difference value information from a valve opening and closing preset database; the preset valve opening and closing database stores the corresponding relation between the difference information and the steam turbine valve control parameter, and the steam turbine valve control parameter is movably matched with the difference information; generating a steam supply control instruction of the steam turbine shaft seal according to the control parameters of the steam turbine valve;
the instruction sending module is used for sending the steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal; the control terminal is used for adjusting the current steam parameter of the steam turbine shaft seal to reach the target steam parameter according to the steam turbine shaft seal steam supply control instruction.
8. A steam turbine valve control system, the system comprising: the system comprises a server, a control terminal and a preset sensor group; the preset sensor group is installed inside the steam turbine shaft seal, and the server is in communication connection with the control terminal and the preset sensor group;
the preset sensor group is used for monitoring the internal environment of the steam turbine shaft seal to obtain the current steam parameter;
the server is used for responding to a steam supply control request aiming at the steam turbine shaft seal and acquiring the current steam parameters of the steam turbine shaft seal through a preset sensor group; determining steam parameters to be adjusted of the steam turbine shaft seal according to the current steam parameters and predetermined target steam parameters; wherein the steam parameter to be adjusted is the difference value between the target steam parameter and the current steam parameter; acquiring a steam turbine valve control parameter corresponding to the difference value information from a valve opening and closing preset database; the preset valve opening and closing database stores the corresponding relation between the difference information and the steam turbine valve control parameter, and the steam turbine valve control parameter is movably matched with the difference information; generating a steam supply control instruction of the steam turbine shaft seal according to the control parameters of the steam turbine valve; sending the steam supply control instruction of the steam turbine shaft seal to a control terminal corresponding to the steam turbine shaft seal;
the control terminal is used for adjusting the current steam parameter of the steam turbine shaft seal to reach the target steam parameter according to the steam turbine shaft seal steam supply control instruction.
9. A computer device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 6.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 6.
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| CN202011277614.6A CN112392554B (en) | 2020-11-16 | 2020-11-16 | Steam supply control method, device and system for steam turbine shaft seal and computer equipment |
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| CN202011277614.6A CN112392554B (en) | 2020-11-16 | 2020-11-16 | Steam supply control method, device and system for steam turbine shaft seal and computer equipment |
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| CN112392554B true CN112392554B (en) | 2023-03-24 |
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| CN108915788A (en) * | 2018-09-11 | 2018-11-30 | 山东国电发电工程有限公司 | Condensing turbine low pressure shaft seal seals Optimal Control System and method |
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| JPS5532926A (en) * | 1978-08-25 | 1980-03-07 | Fuji Electric Co Ltd | Shaft sealing equipment of geothermal heat turbine |
| CN205895328U (en) * | 2016-08-08 | 2017-01-18 | 大唐七台河发电有限责任公司 | Power station steam turbine shaft seals and subtracts warm system |
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| CN112392554A (en) | 2021-02-23 |
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