CN116641763A - Method and device for controlling front steam pressure of multi-module high-temperature reactor steam turbine - Google Patents
Method and device for controlling front steam pressure of multi-module high-temperature reactor steam turbine Download PDFInfo
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- CN116641763A CN116641763A CN202310627210.2A CN202310627210A CN116641763A CN 116641763 A CN116641763 A CN 116641763A CN 202310627210 A CN202310627210 A CN 202310627210A CN 116641763 A CN116641763 A CN 116641763A
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- 238000000034 method Methods 0.000 title claims abstract description 66
- 230000001105 regulatory effect Effects 0.000 claims abstract description 59
- 230000001276 controlling effect Effects 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
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- 230000003287 optical effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000013307 optical fiber Substances 0.000 description 1
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Classifications
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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
- F01D17/00—Regulating or controlling by varying flow
- F01D17/02—Arrangement of sensing elements
- F01D17/08—Arrangement of sensing elements responsive to condition of working-fluid, e.g. pressure
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21D—NUCLEAR POWER PLANT
- G21D3/00—Control of nuclear power plant
- G21D3/08—Regulation of any parameters in the plant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Abstract
The application discloses a method and a device for controlling the front steam pressure of a multi-module high-temperature reactor steam turbine, wherein the method comprises the following steps: when the RB working condition occurs, the opening of the regulating valve of the steam turbine is regulated to the opening corresponding to the current output power of the steam turbine; the opening of the regulating valve is regulated according to a pressure control mode, whether the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value exceeds a deviation limit value is judged, if not, the valve is switched to a valve control mode, and the opening of the regulating valve is regulated according to the valve control mode; and recovering to a pressure control mode, and adjusting the opening of the regulating valve according to the pressure control mode. Through the technical scheme, when the shutdown condition occurs to one or more modules of the multi-module high-temperature reactor, the control of the steam pressure before the steam turbine can be realized, and the excessive fluctuation of the steam pressure before the steam turbine is avoided. And moreover, the shutdown times of the reactor module can be reduced, and the safety risk is reduced.
Description
Technical Field
The application belongs to the technical field of nuclear power, and particularly relates to a method and a device for controlling the front steam pressure of a multi-module high-temperature reactor steam turbine.
Background
In the multi-module high-temperature gas cooled reactor, in order to ensure that the evaporator operates under the working condition that the pressure is relatively stable, the control strategy of the steam pressure before the steam turbine is to use the pressure control under the normal working condition, and the control is carried out by adopting DEH (steam turbine control system) logic under the RB working condition (when the multi-module high-temperature reactor steam turbine operates, one or more modules are in emergency shutdown), and the stability of the steam pressure before the steam turbine is ensured by controlling the opening of a regulating valve, so that the stability of the outlet pressure of the evaporator is realized. However, DEH logic primarily adjusts the regulator valve at a rate until the regulator valve is adjusted to a fixed valve opening. In order to reduce the fluctuation of the steam pressure in the steam main, the speed is generally required to be adjusted according to the actual condition of the site, and in order to adjust the speed, the working condition is required to be continuously reproduced, the reactor is required to be shut down for a plurality of times, and the safety of the nuclear power plant is greatly challenged by the reactor which is shut down for a plurality of times.
Disclosure of Invention
The application aims to at least solve one of the technical problems in the prior art and provides a method and a device for controlling the front steam pressure of a multi-module high-temperature reactor steam turbine.
According to a first aspect of an embodiment of the present application, there is provided a method for controlling a steam pressure before a multi-module thermopile turbine, including:
step S1, when an RB working condition occurs, adjusting the opening of a regulating valve of the steam turbine to an opening corresponding to the current output power of the steam turbine;
step S2, adjusting the opening of the regulating valve according to a pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, judging whether the deviation between a measured value of the steam pressure before the steam turbine and the pressure set value exceeds a deviation limit value, if so, completing control, otherwise, entering step S3;
s3, switching to a valve control mode, and adjusting the opening of the regulating valve according to the valve control mode until the pressure of the steam before the steam turbine tends to be stable;
and S4, recovering to a pressure control mode, adjusting the opening of the regulating valve according to the pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, if the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value does not exceed a deviation limit value, completing control, otherwise, returning to the step S1.
Optionally, in step S2, the adjusting the opening of the regulating valve according to the pressure control manner specifically includes:
acquiring a measured value of steam pressure before a steam turbine;
determining a first target opening according to the acquired measured value and the pressure set value;
and adjusting the opening of the regulating valve according to the determined first target opening.
Optionally, in step S3, the adjusting the opening of the adjusting valve according to the valve control mode specifically includes:
acquiring steam flow of a steam turbine;
determining a second target opening according to the acquired steam flow;
and adjusting the opening of the regulating valve according to the determined second target opening.
Optionally, the steam flow is characterized by a sum of percentages of turbine feedwater flow.
Optionally, in step S3, the pressure set point of the controller tracks the actual measured value of the steam pressure before the turbine during the process of adjusting the opening of the regulating valve according to the valve control mode.
Optionally, in step S4, during the process of adjusting the opening of the regulating valve according to the pressure control mode, the pressure set value is slowly switched from the actual measured value of the steam pressure before the steam turbine to the rated value.
Optionally, after the pressure set point is slowly switched from the actual measurement of the steam pressure before the turbine to the nominal value, the pressure set point is not allowed to be modified for a preset time, which is the minimum time required to stabilize the steam pressure before the turbine.
According to a second aspect of embodiments of the present application, there is provided a control device for a multi-module thermopile turbine front steam pressure, comprising a control module configured to perform the steps of:
step S1, when an RB working condition occurs, adjusting the opening of a regulating valve of the steam turbine to an opening corresponding to the current output power of the steam turbine;
step S2, adjusting the opening of the regulating valve according to a pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, judging whether the deviation between a measured value of the steam pressure before the steam turbine and the pressure set value exceeds a deviation limit value, if so, completing control, otherwise, entering step S3;
s3, switching to a valve control mode, and adjusting the opening of the regulating valve according to the valve control mode until the pressure of the steam before the steam turbine tends to be stable;
and S4, recovering to a pressure control mode, adjusting the opening of the regulating valve according to the pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, if the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value does not exceed a deviation limit value, completing control, otherwise, returning to the step S1.
According to a third aspect of embodiments of the present application, there is provided an electronic device comprising a memory, a processor and a program stored on the memory and executable on the processor, the program being configured to implement the steps of the method of controlling the steam pressure before a multi-module thermopile turbine as described above.
According to a fourth aspect of embodiments of the present application, there is provided a medium having a program stored thereon, which when executed by a processor, implements the steps of the method for controlling the pressure of steam before a multi-module thermopile turbine described above.
The technical scheme of the application has the following beneficial technical effects:
through the technical scheme, when the shutdown condition occurs to one or more modules of the multi-module high-temperature reactor, the control of the steam pressure before the steam turbine can be realized, and the excessive fluctuation of the steam pressure before the steam turbine is avoided. And moreover, the shutdown times of the reactor module can be reduced, and the safety risk is reduced. In addition, the manual intervention of operators can be avoided, the operation amount of the manual intervention can be reduced, and the error probability of the manual operation is reduced.
Drawings
FIG. 1 is a flow chart of a method of controlling the pre-steam pressure of a multi-module thermopile turbine in an exemplary embodiment of the application;
FIG. 2 is a schematic diagram of the control principle of the steam pressure before the turbine under the normal working condition in the exemplary embodiment of the application;
FIG. 3 is a schematic diagram of the control principle of the steam pressure before the turbine under the RB working condition in the exemplary embodiment of the application;
FIG. 4 is a block diagram of an electronic device for performing a method of controlling a pre-steam pressure of a multi-module thermopile turbine according to an embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
The embodiment of the application provides a method for controlling the front steam pressure of a multi-module high-temperature reactor steam turbine, and fig. 1 shows a flow of the method for controlling the front steam pressure of the multi-module high-temperature reactor steam turbine, wherein the flow comprises the following steps:
and S1, when the RB working condition occurs, adjusting the opening of the regulating valve of the steam turbine to an opening corresponding to the current output power of the steam turbine.
In this embodiment, the opening of the regulating valve of the steam turbine is adjusted to an opening corresponding to the current output power of the steam turbine, which may be implemented by a feedforward value of the reactor power as the primary adjustment under the RB working condition. For example, during normal operation, the turbine regulating valve controls the turbine front steam pressure to be near the rated value through PID output, the PID pressure regulating algorithm is provided with feedforward, the current reactor power value can be sent to the turbine control system to serve as a feedforward control value of the turbine front pressure, when one reactor shutdown occurs, the corresponding target load becomes zero, and the PID can control the opening of the turbine regulating valve to be quickly adjusted to a valve position corresponding to the target load of the remaining operating reactor.
And S2, adjusting the opening of the regulating valve according to a pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, judging whether the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value exceeds a deviation limit value, if so, completing control, otherwise, entering step S3.
In this embodiment, the opening of the regulating valve is adjusted according to a pressure control manner, so that the pressure of the steam before the steam turbine is stabilized near the pressure set value, and the second adjustment under the RB working condition is performed, and the process specifically includes: a measurement of the steam pressure before the turbine is obtained. And determining a first target opening according to the acquired measured value and the pressure set value. And adjusting the opening of the regulating valve according to the determined first target opening.
It should be noted that, after the second adjustment, since the pressure drop trend of the steam pipe is not clear, there may be a case where the pressure is not stabilized within a predetermined required range after the adjustment of the adjusting valve, for which reason, the embodiment of the present application further adjusts the opening degree of the adjusting valve.
And S3, switching to a valve control mode, and adjusting the opening of the regulating valve according to the valve control mode until the pressure of the steam before the steam turbine tends to be stable.
In this embodiment, the opening of the regulating valve is adjusted according to a valve control mode, and the third adjustment under the RB working condition specifically includes: and obtaining the steam flow of the steam turbine. And determining a second target opening according to the acquired steam flow. And adjusting the opening of the regulating valve according to the determined second target opening.
And in the process of adjusting the opening of the regulating valve according to a valve control mode, the pressure set value of the controller tracks the actual measured value of the steam pressure before the steam turbine. The purpose of this is to make the calculated output of the controller be 0 under the valve control mode, and make the output of the controller track the current regulating valve opening, so that the undisturbed switching of the two control modes can be realized.
Wherein the steam flow is characterized by a sum of percentages of the turbine feedwater flow. The water supply flow rate characterizes the steam flow rate, which in turn has a clear correspondence with the opening of the regulating valve, so that the percentage of the water supply flow rate can be directly used as the given value of the second target opening.
In order to ensure that the valve has enough time to operate, it is necessary to maintain the valve control mode control for a certain period of time. In addition, because the valve action is faster than the steam pressure change, a certain stabilization time is needed for the steam pressure to be reserved, so that the steam in the steam pipeline initially reaches a balanced and stable state, and the valve control mode control for a certain time can meet the working condition requirements.
And S4, recovering to a pressure control mode, adjusting the opening of the regulating valve according to the pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, if the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value does not exceed a deviation limit value, completing control, otherwise, returning to the step S1.
In this embodiment, the pressure control mode is restored, and the opening of the regulating valve is adjusted according to the pressure control mode, so that the steam pressure before the steam turbine is stabilized near the pressure set value, and as the fourth adjustment under the RB working condition, the pressure set value is slowly switched from the actual measured value of the steam pressure before the steam turbine to the rated value in the process of adjusting the opening of the regulating valve according to the pressure control mode. And, after the pressure set point is slowly switched from the actual measured value of the steam pressure before the steam turbine to the rated value, the pressure set point is not allowed to be modified for a preset time, which is the shortest time required for stabilizing the steam pressure before the steam turbine. The purpose of this is to stabilize the steam pressure before the turbine by automatic means, reducing the control fluctuations introduced by manual operations.
The preset time may be 60 seconds or other time period.
After the process is finished, if the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value does not exceed the deviation limit value, the steam pressure before the steam turbine is stabilized, otherwise, the steps S1-S4 are needed to be repeated.
Through the technical scheme, when the shutdown condition occurs to one or more modules of the multi-module high-temperature reactor, the control of the steam pressure before the steam turbine can be realized, and the excessive fluctuation of the steam pressure before the steam turbine is avoided. And moreover, the shutdown times of the reactor module can be reduced, and the safety risk is reduced. In addition, the manual intervention of operators can be avoided, the operation amount of the manual intervention can be reduced, and the error probability of the manual operation is reduced.
For ease of understanding, the following examples describe the process of controlling a steam turbine using the method for controlling the pre-turbine steam pressure according to an embodiment of the present application.
(one) Normal operation Condition control
During normal operation, the turbine regulating valve controls the steam pressure before the turbine to be near the rated value through PID output. The PID pressure regulation algorithm is provided with feedforward, the feedforward control value is derived from RB target load values generated by the power control modules of the two reactors, and the PID can send the current reactor power value to the turbine control system as the feedforward control value of the turbine front pressure. The control principle is shown in figure 2.
In order to ensure the accuracy of feedforward, the corresponding relation between the power target load value of the reactor and the opening degree of the regulating valve of the steam turbine can be checked, so that the precise corresponding relation between the power target load value and the opening degree of the regulating valve of the steam turbine is kept at all times.
Through the control mode, the stability of the steam pressure before the steam turbine can be ensured to be realized in the normal operation working condition.
Control of operating conditions of one or more reactor shutdown
When a reactor is shut down, the corresponding evaporators are isolated, and the steam pressure in front of the main steam header and the steam turbine can fluctuate greatly. Meanwhile, a shutdown signal triggered by the reactor protection system triggers an RB signal, and the generation of the signal marks that the unit enters an RB working condition. Under the working condition, the control of the steam pressure is realized through a steam pressure control strategy under the RB working condition, and the method specifically comprises the following steps:
1. after the RB working condition occurs, the corresponding target load becomes zero, and in order to maintain the stability of the steam pressure before the steam turbine, the PID controls the opening of the steam turbine regulating valve according to the feedforward value (and the measured value of the steam pressure before the steam turbine) so as to quickly adjust the opening to a valve position corresponding to the target load of the residual operation reactor.
2. After the adjustment is finished, the PID automatically controls the steam pressure in a pressure control mode, and the steam pressure before the steam turbine is stabilized near a pressure set value. And calculating the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value, judging whether the deviation is less than or equal to 7.5%, and if so, indicating that the control is completed.
3. Because the pressure drop trend of the steam pipeline is not clear, the condition that the steam pressure before the steam turbine cannot be stabilized in the rated range possibly exists, namely, when the deviation between the pressure set value and the measured value is more than 7.5%, the control logic under the RB working condition is triggered at the moment, the steam turbine control system is converted into a valve control mode, and the opening of the regulating valve is regulated according to the valve control mode until the steam pressure before the steam turbine tends to be stabilized. The valve position command is derived from the sum of the percentages of the water supply flows, and the percentages of the water supply flows can be directly used as the given values because the water supply flows can represent the steam flows which have a clear corresponding relation with the opening of the regulating valve.
The time for switching to valve control is a certain time limit value, and the valve control mode can be automatically switched to after the time limit is up. The time limit is set to ensure that the valve has enough time to act, and as the valve acts faster than the steam pressure changes, a certain stable time is needed to be reserved for the steam pressure, so that the steam in the steam pipeline initially reaches a balanced stable state.
In the process, the PID is in a manual state, the pressure set value of the PID tracks the actual pressure measured value, the calculated output of the PID is 0, and the AV output of the PID tracks the actual valve opening, so that the purpose of the PID is to keep the output of the PID in the process of manual and automatic switching, namely, the undisturbed switching can be realized in the process of switching the pressure control mode and the valve control mode of the steam turbine.
At the same time, the pressure set point is not allowed to be modified by an operator during the working time, so that the aim is to stabilize the steam pressure before the steam turbine by an automatic means and reduce control fluctuation introduced by manual operation.
4. After the valve control time limit is finished, the control mode is automatically switched to the pressure control mode. And the PID automatically controls the steam pressure again in a pressure control mode, calculates the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value again after the steam pressure before the steam turbine is stabilized near the pressure set value, judges whether the deviation is less than or equal to 7.5%, and if so, indicates that the control is completed.
In the process, the pressure set point is slowly switched from the actual measured value of the steam pressure before the turbine to the rated value. And, after the pressure set point is slowly switched from the actual measurement of the steam pressure before the turbine to the nominal value, the operator is not allowed to modify the pressure set point for a preset time (for example, 60 s) to avoid control fluctuations introduced by manual operations. After the pre-turbine steam pressure stabilizes, control of the pre-turbine pressure reverts to a normal pressure control mode and may allow an operator to modify the pressure set point based on the operating conditions of the unit.
After the above operation is finished, if the steam pressure before the turbine cannot be stabilized, the above steps 1 to 4 may be repeated until the steam pressure before the turbine can be stabilized within the rated range.
The embodiment of the application also provides a device for controlling the front steam pressure of the multi-module high-temperature reactor steam turbine, which is used for realizing the method for controlling the front steam pressure of the multi-module high-temperature reactor steam turbine.
The specific implementation method of the device for controlling the front steam pressure of the multi-module high-temperature reactor steam turbine provided by the embodiment of the application can be referred to the method for controlling the front steam pressure of the multi-module high-temperature reactor steam turbine provided by the embodiment of the application, and will not be described herein.
It should be noted that, the control device for steam pressure before a steam turbine provided in the embodiment of the present application belongs to the same concept as the method embodiments in the above embodiments, and any method provided in the method embodiment may be operated on the control device for steam pressure before a steam turbine, and detailed implementation processes of the method embodiment are referred to in the method embodiment and are not repeated herein.
The embodiment of the application also provides electronic equipment for executing the control method. Fig. 4 shows a block diagram of an electronic device for performing the method for controlling the pre-steam pressure of a multi-module thermopile turbine according to an embodiment of the present application.
As shown in fig. 4, an electronic device 400 includes a processor 410 and memory 420. The processor 410 is in communication with a memory 420. The memory 420 stores instructions executable by the processor 410, which are executed by the processor 410, to enable the processor 410 to implement the methods described in the above embodiments.
The memory 420 and the processor 410 are connected by a bus, and a communication bus may connect various other circuits such as peripheral devices, voltage regulators, power management circuits, etc. in addition to the processor 410 and the memory 420, which are well known in the art and therefore will not be further described herein.
The processor 410 is responsible for managing the bus and general processing and may also provide various functions including timing, peripheral interfaces, voltage regulation, power management, and other control functions. And memory 420 may be used to store data used by processor 410 in performing operations. By way of example, memory 420 may include any one or more of the following combinations: any type of RAM (Random Access Memory ), any type of ROM (Read-Only Memory), flash Memory devices, hard disks, optical disks, etc. More generally, any memory may store information using any technique. Further, any memory may provide volatile or non-volatile retention of information.
It should be noted that, the electronic device provided in the embodiment of the present application belongs to the same concept as the method embodiment in the above embodiment, and any method provided in the method embodiment may be run on the electronic device, and detailed implementation processes of the method embodiment are detailed in the method embodiment and are not repeated herein.
The embodiment of the application also provides a computer readable storage medium, which stores a computer program, and the computer program realizes the method of the embodiment of the method when being executed by a processor.
Wherein the computer readable storage medium may be any tangible medium that can contain, or store a program that can be an electronic, magnetic, optical, electromagnetic, infrared, semiconductor system, apparatus, device, more specific examples of which include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, an optical fiber, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof.
It should be noted that, the medium provided by the embodiment of the present application belongs to the same concept as the method embodiment in the foregoing embodiment, and any method provided in the method embodiment may be stored on the medium, and the detailed implementation process of the method embodiment is detailed in the method embodiment and will not be repeated herein.
It should be noted that the terms "target," "current," and the like in the description and claims of the present application and the above-described drawings are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "includes," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be understood that the foregoing is illustrative only and is not limiting, and that in specific applications, those skilled in the art may set the application as desired, and the application is not limited thereto.
Claims (10)
1. A method for controlling the pressure of steam before a multi-module thermopile turbine, comprising:
step S1, when an RB working condition occurs, adjusting the opening of a regulating valve of the steam turbine to an opening corresponding to the current output power of the steam turbine;
step S2, adjusting the opening of the regulating valve according to a pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, judging whether the deviation between a measured value of the steam pressure before the steam turbine and the pressure set value exceeds a deviation limit value, if so, completing control, otherwise, entering step S3;
s3, switching to a valve control mode, and adjusting the opening of the regulating valve according to the valve control mode until the pressure of the steam before the steam turbine tends to be stable;
and S4, recovering to a pressure control mode, adjusting the opening of the regulating valve according to the pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, if the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value does not exceed a deviation limit value, completing control, otherwise, returning to the step S1.
2. The method according to claim 1, wherein in step S2, the adjusting the opening of the regulating valve according to the pressure control mode specifically includes:
acquiring a measured value of steam pressure before a steam turbine;
determining a first target opening according to the acquired measured value and the pressure set value;
and adjusting the opening of the regulating valve according to the determined first target opening.
3. The method according to claim 1, wherein in step S3, the adjusting the opening of the regulating valve according to a valve control manner specifically includes:
acquiring steam flow of a steam turbine;
determining a second target opening according to the acquired steam flow;
and adjusting the opening of the regulating valve according to the determined second target opening.
4. The method of claim 3, wherein the steam flow is characterized by a sum of percentages of turbine feedwater flow.
5. The method according to claim 1, characterized in that in step S3, the pressure set point of the controller tracks the actual measurement of the steam pressure before the turbine during the adjustment of the opening of the regulating valve according to a valve control.
6. The method according to claim 5, characterized in that in step S4, the pressure set point is slowly switched from the actual measured value of the steam pressure before the turbine to a nominal value during the adjustment of the opening of the regulating valve in accordance with the pressure control.
7. The method of claim 6, wherein after the pressure set point is slowly switched from the actual measurement of the steam pressure before the turbine to the nominal value, the pressure set point is not allowed to be modified for a preset time, the preset time being the minimum time required to stabilize the steam pressure before the turbine.
8. A control device for the pre-steam pressure of a multi-module thermopile turbine, comprising a control module configured to perform the steps of:
step S1, when an RB working condition occurs, adjusting the opening of a regulating valve of the steam turbine to an opening corresponding to the current output power of the steam turbine;
step S2, adjusting the opening of the regulating valve according to a pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, judging whether the deviation between a measured value of the steam pressure before the steam turbine and the pressure set value exceeds a deviation limit value, if so, completing control, otherwise, entering step S3;
s3, switching to a valve control mode, and adjusting the opening of the regulating valve according to the valve control mode until the pressure of the steam before the steam turbine tends to be stable;
and S4, recovering to a pressure control mode, adjusting the opening of the regulating valve according to the pressure control mode to enable the steam pressure before the steam turbine to be stabilized near a pressure set value, if the deviation between the measured value of the steam pressure before the steam turbine and the pressure set value does not exceed a deviation limit value, completing control, otherwise, returning to the step S1.
9. An electronic device comprising a memory, a processor, and a program stored on the memory and executable on the processor, the program configured to implement the steps of the method of controlling the pre-steam pressure of a multi-module thermopile turbine of any of claims 1-7.
10. A medium having stored thereon a program which when executed by a processor performs the steps of the method of controlling the pre-steam pressure of a multi-module thermopile turbine according to any of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310627210.2A CN116641763A (en) | 2023-05-29 | 2023-05-29 | Method and device for controlling front steam pressure of multi-module high-temperature reactor steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310627210.2A CN116641763A (en) | 2023-05-29 | 2023-05-29 | Method and device for controlling front steam pressure of multi-module high-temperature reactor steam turbine |
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| CN116641763A true CN116641763A (en) | 2023-08-25 |
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| CN202310627210.2A Pending CN116641763A (en) | 2023-05-29 | 2023-05-29 | Method and device for controlling front steam pressure of multi-module high-temperature reactor steam turbine |
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| CN (1) | CN116641763A (en) |
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- 2023-05-29 CN CN202310627210.2A patent/CN116641763A/en active Pending
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