CN115638032A - Turbine control method and device, readable storage medium and computer equipment - Google Patents
Turbine control method and device, readable storage medium and computer equipment Download PDFInfo
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- CN115638032A CN115638032A CN202211208203.0A CN202211208203A CN115638032A CN 115638032 A CN115638032 A CN 115638032A CN 202211208203 A CN202211208203 A CN 202211208203A CN 115638032 A CN115638032 A CN 115638032A
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Abstract
A control method, a device, a readable storage medium and computer equipment of a turbine comprise the steps that when a grid-connected signal is received, a power control program of each power stage is started in sequence; when a power control program of a current power stage is started, determining the current temperature state of the turbine according to the temperature of an air inlet of the turbine, and inquiring a power target value and a power change rate corresponding to the current temperature state in the current power stage; performing rate-rise control on the power of the turbine according to the inquired power target value and power change rate, and monitoring the power of the generator in real time; and when the power of the generator is larger than the power limit value corresponding to the current power stage, starting to execute a power control program of the next power stage. By the method, the power of the turbine can meet the technological requirements during grid connection.
Description
Technical Field
The invention relates to the technical field of turbine control, in particular to a turbine control method, a turbine control device, a readable storage medium and computer equipment.
Background
The steam turbine, also called turbo engine, is a rotary steam power plant, and the high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that the rotor with blade rows rotates and works outwards at the same time. The steam turbine is the main equipment of modern thermal power plant, and is also widely applied to metallurgical industry, chemical industry and ship power devices.
The steam turbine is an important component of the nuclear power unit, and the regulation of the power of the steam turbine needs to be strictly controlled during the grid connection of the nuclear power unit so as to ensure the normal operation of the reactor. When the existing nuclear power plant unit is connected to the grid, the steam turbine drives the generator with power close to the minimum load value, and the condition that the power cannot meet the power requirement of the steam turbine easily occurs in the mode, so that the power of the nuclear reactor and the steam turbine is mismatched, and the safe grid connection is influenced.
Disclosure of Invention
In view of the above, it is necessary to provide a method and an apparatus for controlling a turbine, a readable storage medium, and a computer device, which are used to solve the problem that power of a nuclear power plant unit is not capable of meeting the power requirement of the turbine when the nuclear power plant unit is connected to the grid in the prior art.
A method for controlling a turbine, comprising,
when a grid-connected signal is received, sequentially starting power control programs of all power stages;
when a power control program of a current power stage is started, determining the current temperature state of the turbine according to the temperature of an air inlet of the turbine, and inquiring a power target value and a power change rate corresponding to the current temperature state in the current power stage;
carrying out rate-rise control on the power of the turbine according to the inquired power target value and power change rate, and monitoring the power of the generator in real time;
and when the power of the generator is larger than the power limit value corresponding to the current power stage, starting to execute a power control program of the next power stage.
Further, the control method described above, wherein the power change rate of each power phase is sequentially decreased, and the power target value is sequentially increased.
Further, in the control method, the temperature states of the turbine include a first temperature state, a second temperature state, and a third temperature state in which the temperatures increase in sequence, and the power target values in the first temperature state, the second temperature state, and the third temperature state are the same in the same power stage, and the power change rates increase in sequence.
Further, the control method may further comprise the step of determining a current temperature state of the turbine according to the temperature of the air inlet of the turbine, including:
when the temperature of an air inlet of a turbine is less than or equal to 100 ℃, determining that the current temperature state of the turbine is a first temperature state;
when the temperature of the air inlet of the turbine is more than 100 ℃ and less than 200 ℃, determining that the current temperature state of the turbine is a third temperature state and a second temperature state;
and when the temperature of the air inlet of the turbine is greater than or equal to 200 ℃, determining that the current temperature state of the turbine is a third temperature state.
Further, the above control method, wherein the step of starting the power control procedure for executing the next power stage further includes:
monitoring working parameters of a nuclear power unit, and judging whether the working parameters meet power limiting conditions;
if yes, ending the power control program and carrying out early warning;
if not, executing the step of starting the power control program of the next power stage.
Further, in the control method, the operating parameters of the nuclear power generating unit include power of a generator, temperature of a high-pressure cylinder of a turbine, and differential expansion between a high-pressure cylinder and a low-pressure cylinder of the turbine, and the power limitation condition includes any one of the following conditions:
the power of the generator does not exceed a rated threshold;
the temperature difference between the upper part and the lower part of the high-pressure cylinder is less than 30 ℃;
the differential expansion of the high pressure cylinder and the low pressure cylinder is not higher than a threshold value.
Further, in the control method, the performing of the early warning is performed in at least one of the following manners:
sending an alarm signal to a user terminal;
and controlling an alarm device to give an alarm.
The invention also discloses a control system of the turbine, which comprises,
the first starting module is used for starting the power control programs of all power stages in sequence when receiving a grid-connected signal;
the query module is used for determining the current temperature state of the turbine according to the temperature of an air inlet of the turbine when a power control program of the current power stage is started, and querying a power target value and a power change rate corresponding to the current temperature state in the current power stage;
the boost rate control module is used for carrying out boost rate control on the power of the turbine according to the inquired power target value and power change rate and monitoring the power of the generator in real time;
and the second starting module is used for starting and executing a power control program of the next power stage when the power of the generator is greater than the power limit value corresponding to the current power stage.
Further, the control system of the turbine further includes:
the monitoring module is used for monitoring working parameters of the nuclear power unit and judging whether the working parameters meet power limiting conditions;
the early warning module is used for ending the power control program and carrying out early warning when the working parameters meet the power limiting conditions;
and when the working parameter does not meet the power limiting condition, the second starting module executes the step of starting the power control program for executing the next power stage.
The invention also discloses computer equipment which comprises a memory and a processor, wherein the memory stores programs, and the programs realize any one of the control methods when being executed by the processor.
The present invention also discloses a computer-readable storage medium having a program stored thereon, which when executed by a processor implements any of the above-described control methods.
When receiving a grid-connected signal, the power control program of each power stage is started in sequence according to the preset control sequence of each power stage. When the power control program is executed, the temperature state of the turbine is determined, the power target value and the power change rate in the current power stage and the current temperature state are inquired, the power of the turbine is controlled according to the inquired power target value and the power change rate, and when the starting point power of the generator reaches the power limit value of the power stage, the power control of the next power stage is started. By the method, the power of the turbine can meet the process requirement during grid connection.
Drawings
FIG. 1 is a flow chart of a method of controlling a turbine in a first embodiment of the present invention;
FIG. 2 is a flow chart of a method of controlling a turbine in a second embodiment of the present invention;
FIG. 3 is a block diagram showing a control apparatus of a turbine according to a third embodiment of the present invention;
fig. 4 is a schematic structural diagram of a computer device in an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited correspondingly. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
Referring to fig. 1, a method for controlling a turbine according to a first embodiment of the present invention includes steps S11 to S14.
And S11, when a grid-connected signal is received, sequentially starting power control programs of all power stages.
The power control of the turbine is divided into two cases of power-up and power-down control, and no matter the power-up or power-down condition, the power control program of each power stage needs to be started in sequence through the control of a plurality of power stages.
Step S12, when the power control program of the current power stage is started, determining the current temperature state of the turbine according to the temperature of the air inlet of the turbine, and inquiring a power target value and a power change rate corresponding to the current temperature state in the current power stage.
And S13, performing rate-rise control on the power of the turbine according to the inquired power target value and power change rate, and monitoring the power of the generator in real time.
And S14, when the power of the generator is larger than the power limit value corresponding to the current power stage, starting to execute a power control program of the next power stage.
When the power control routine for the current power stage is initiated, it is first necessary to determine the current temperature state of the turbine based on the temperature of the inlet of the turbine. Specifically, three temperature states of the turbine can be set, namely a first temperature state, a second temperature state and a third temperature state, and when the temperature of the air inlet of the turbine is less than or equal to 100 ℃, the current temperature state of the turbine is determined to be the first temperature state; when the temperature of the air inlet of the turbine is more than 100 ℃ and less than 200 ℃, determining that the current temperature state of the turbine is a second temperature state; and when the temperature of the air inlet of the turbine is greater than or equal to 200 ℃, determining that the current temperature state of the turbine is a third temperature state.
And setting corresponding power target values and power change rates under each temperature state of each power stage. Under the same power stage, the power change rates under the first temperature state, the second temperature state and the third temperature state are sequentially increased. Under the same temperature state, the power change rate of each power stage is sequentially reduced, and the power target value is sequentially increased. And performing power-rise control according to the corresponding power target value and power change rate under the current power stage and the current temperature state of the turbine.
The number of power stages may be set according to actual requirements, for example, three power stages, i.e., a power stage one, a power stage two, and a power stage three, may be set in this embodiment. The power target values of the power stage I, the power stage II and the power stage III are sequentially increased, the turbine sequentially goes through the power stage I, the power stage II and the power stage III in the power increasing process, namely the power of the turbine is gradually increased according to the target values set in the power stages, and the power of the turbine is guaranteed to accurately meet the working requirement. The target values of the power phases are set to be the same in different temperature states, and the power change rate change trends of the first power phase, the second power phase and the third power phase are reduced in the same temperature state, for example, the power change rates of the three power phases are: the power change rate of the first power stage is more than the power change rate of the second power stage is more than the power change rate of the third power stage. Namely, the power can rise faster in the early period and slowly in the later period in the process of increasing the power. The mode can ensure that steam generated by the reactor can meet the power requirement of the steam turbine at the moment of grid connection of the nuclear power unit. The power target values and power change rate settings for each power phase and each temperature state in the present embodiment may be as shown in table 1.
TABLE 1
And inquiring the power target value and the power change rate corresponding to the current temperature state at the current power stage. And controlling the rate of rise or the rate of fall of the power of the turbine according to the inquired power target value and the power change rate, and monitoring the power of the generator in real time. It will be appreciated that each power stage corresponds to a power limit for the generator, with the power limits for the generator power being different for different power stages. And when the power of the generator is monitored to be larger than the power limit value corresponding to the current power stage, starting to execute a power control program of the next power stage until all power control of all power stages is finished.
In this embodiment, when a grid-connected signal is received, the power control programs of the power stages are sequentially started according to a preset control sequence of the power stages. When the power control program is executed, the temperature state of the turbine is determined, the power target value and the power change rate in the current power stage and the current temperature state are inquired, the power of the turbine is controlled according to the inquired power target value and the power change rate, and when the starting point power of the generator reaches the power limit value of the power stage, the power control of the next power stage is started. By the method, the power of the turbine can meet the process requirement during grid connection.
Referring to fig. 2, a method for controlling a turbine according to a second embodiment of the present invention includes steps S21 to S27.
And S21, when a grid-connected signal is received, sequentially starting power control programs of all power stages.
Step S22, when the power control program of the current power stage is started, determining the current temperature state of the turbine according to the temperature of the air inlet of the turbine, and inquiring a power target value and a power change rate corresponding to the current temperature state in the current power stage.
And step S23, performing rate-up control on the power of the turbine according to the inquired power target value and power change rate.
In this embodiment, the power control of the turbine during the grid connection is divided into a plurality of power stages and a plurality of temperature states, and the turbine sequentially increases the power according to each power stage. In specific implementation, the power stage of the turbine is divided into three stages, namely a power stage I, a power stage II and a power stage III. The temperature state is also divided into three types, namely a first temperature state, a second temperature state and a third temperature state, and specifically, when the temperature of the air inlet of the turbine is less than or equal to 100 ℃, the current temperature state of the turbine is determined to be the first temperature state; when the temperature of the air inlet of the turbine is more than 100 ℃ and less than 200 ℃, determining that the current temperature state of the turbine is a second temperature state; and when the temperature of the air inlet of the turbine is greater than or equal to 200 ℃, determining that the current temperature state of the turbine is a third temperature state.
Under the same temperature state, the power change rates of the first power stage, the second power stage and the third power stage are sequentially reduced, and the power target values are sequentially increased; in the same power stage, the power target values in the temperature states are the same, and the power change rates in the first temperature state, the second temperature state and the third temperature state are sequentially increased. The method can ensure that the power of the turbine is stably and quickly increased, meet the power requirement of the turbine and realize smooth grid connection.
When the turbine is connected to the power grid, the turbine sequentially increases the rate from the first power stage to the third power stage, the temperature state of the turbine is confirmed from each liter to one power stage, and the power target value and the power change rate corresponding to the current temperature state in the current power stage are inquired. And then, performing rate-rise control on the power of the turbine according to the inquired power target value and power change rate.
And S24, monitoring working parameters of the nuclear power unit, judging whether the working parameters meet power limiting conditions, if not, executing S25, and if so, executing S27.
And S25, monitoring the power of the generator, judging whether the power of the generator is greater than the power limit value corresponding to the current power stage, and if so, executing S26.
Step S26 starts a power control procedure for executing the next power stage.
And S27, ending the power control program and carrying out early warning.
The method comprises the steps of monitoring working parameters of a nuclear power unit in real time in the rate increase process, wherein the nuclear power unit comprises a turbine, a generator and the like, and the working parameters comprise the power of the generator, the temperature of a high-pressure cylinder of the turbine and the expansion difference of a high-pressure cylinder and a low-pressure cylinder of the turbine. The power limiting condition includes any one of:
the power of the generator does not exceed a rated threshold;
the temperature difference between the upper part and the lower part of the high-pressure cylinder is less than 30 ℃;
the differential expansion of the high pressure cylinder and the low pressure cylinder is not higher than a threshold value.
That is, when any of the above cases occurs, it is described that the power limit needs to be performed, and the power control routine is terminated and an early warning is performed. The early warning method comprises at least one of the following steps:
sending an alarm signal to a user terminal;
and controlling an alarm device to give an alarm.
And if the working parameter does not meet the power limiting condition, monitoring whether the power of the generator reaches a power limiting value corresponding to the current power stage, and if so, entering the next power stage until all power stages are finished or the power limiting condition appears.
Referring to fig. 3, a control system of a turbine according to a third embodiment of the present invention includes,
the first starting module 31 is used for sequentially starting power control programs of each power stage when receiving a grid-connected signal;
the query module 32 is configured to, when a power control program of a current power stage is started, determine a current temperature state of the turbine according to a temperature of an air inlet of the turbine, and query a power target value and a power change rate corresponding to the current temperature state in the current power stage;
the rate-rise control module 33 is used for performing rate-rise control on the power of the turbine according to the inquired power target value and power change rate and monitoring the power of the generator in real time;
and a second starting module 34, configured to start a power control procedure for executing a next power stage when the power of the generator is greater than the power limit corresponding to the current power stage.
Further, the control system of the turbine described above includes:
the monitoring module is used for monitoring working parameters of the nuclear power unit and judging whether the working parameters meet power limiting conditions;
the early warning module is used for ending the power control program and carrying out early warning when the working parameters meet the power limiting conditions;
and when the working parameter does not meet the power limiting condition, the second starting module executes the step of starting the power control program for executing the next power stage.
The control system of the turbine according to the embodiment of the present invention has the same implementation principle and the same technical effects as those of the foregoing method embodiments, and for the sake of brief description, reference may be made to the corresponding contents in the foregoing method embodiments without reference to the apparatus embodiments.
Referring to fig. 4, a computer device according to an embodiment of the present invention is further provided, which includes a processor 10, a memory 20, and a computer program 30 stored in the memory and executable on the processor, wherein the processor 10 implements the control method of the turbine as described above when executing the computer program 30.
The computer device may be, but is not limited to, a personal computer, a server, and other computer devices. The processor 10 may be, in some embodiments, a Central Processing Unit (CPU), controller, microcontroller, microprocessor or other data Processing chip for executing program codes stored in the memory 20 or Processing data.
The memory 20 includes at least one type of readable storage medium, which includes a flash memory, a hard disk, a multimedia card, a card type memory (e.g., SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, and the like. The memory 20 may in some embodiments be an internal storage unit of the computer device, for example a hard disk of the computer device. The memory 20 may also be an external storage device of the computer device in other embodiments, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like provided on the computer device. Further, the memory 20 may also include both an internal storage unit and an external storage device of the computer apparatus. The memory 20 may be used not only to store application software installed in the computer device, various types of data, and the like, but also to temporarily store data that has been output or is to be output.
Optionally, the computer device may further comprise a user interface, which may comprise a Display (Display), an input unit such as a Keyboard (Keyboard), a network interface, a communication bus, etc., and the optional user interface may further comprise a standard wired interface, a wireless interface. Alternatively, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, or the like. The display, which may also be referred to as a display screen or display unit, is suitable for displaying information processed in the computer device and for displaying a visualized user interface. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), typically used to establish a communication link between the device and other electronic devices. The communication bus is used to enable connection communication between these components.
It should be noted that the configuration shown in fig. 4 does not constitute a limitation of the computer device, and in other embodiments, the computer device may include fewer or more components than those shown, or some components may be combined, or a different arrangement of components may be used.
The invention also proposes a computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, implements a method of controlling a turbine as described above.
Those of skill in the art will understand that the logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be viewed as implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus (e.g., a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or execute the instructions). For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method of controlling a turbine, comprising,
when a grid-connected signal is received, sequentially starting power control programs of all power stages;
when a power control program of a current power stage is started, determining the current temperature state of the turbine according to the temperature of an air inlet of the turbine, and inquiring a power target value and a power change rate corresponding to the current temperature state in the current power stage;
carrying out rate-rise control on the power of the turbine according to the inquired power target value and power change rate, and monitoring the power of the generator in real time;
and when the power of the generator is larger than the power limit value corresponding to the current power stage, starting to execute a power control program of the next power stage.
2. The control method of claim 1, wherein the power change rate of each power phase is sequentially decreased, and the power target value is sequentially increased.
3. The control method according to claim 2, wherein the temperature states of the turbine include a first temperature state, a second temperature state, and a third temperature state in which temperatures increase in order, power target values in the first temperature state, the second temperature state, and the third temperature state are the same in the same power stage, and power change rates increase in order.
4. A control method according to claim 3, wherein the step of determining the current temperature state of the turbine based on the temperature of the inlet of the turbine comprises:
when the temperature of an air inlet of the turbine is less than or equal to 100 ℃, determining that the current temperature state of the turbine is a first temperature state;
when the temperature of the air inlet of the turbine is more than 100 ℃ and less than 200 ℃, determining that the current temperature state of the turbine is a third temperature state and a second temperature state;
and when the temperature of the air inlet of the turbine is greater than or equal to 200 ℃, determining that the current temperature state of the turbine is a third temperature state.
5. The control method of claim 1, wherein the step of initiating execution of the power control procedure for the next power phase further comprises:
monitoring working parameters of a nuclear power unit, and judging whether the working parameters meet power limiting conditions;
if yes, ending the power control program and carrying out early warning;
if not, executing the step of starting the power control program of the next power stage.
6. The control method of claim 5, wherein the operating parameters of the nuclear power generating unit include power of a generator, temperature of a high pressure cylinder of a turbine, and differential expansion of a high pressure cylinder and a low pressure cylinder of the turbine, and the power limiting condition includes any one of:
the power of the generator does not exceed a rated threshold;
the temperature difference between the upper part and the lower part of the high-pressure cylinder is less than 30 ℃;
the differential expansion of the high pressure cylinder and the low pressure cylinder is not higher than a threshold value.
7. The control method of claim 5, wherein the pre-warning is performed in at least one of the following ways:
sending an alarm signal to a user terminal;
and controlling an alarm device to give an alarm.
8. A control system for a turbine, comprising,
the first starting module is used for starting the power control programs of all power stages in sequence when receiving a grid-connected signal;
the query module is used for determining the current temperature state of the turbine according to the temperature of an air inlet of the turbine when a power control program of the current power stage is started, and querying a power target value and a power change rate corresponding to the current temperature state in the current power stage;
the boost rate control module is used for carrying out boost rate control on the power of the turbine according to the inquired power target value and power change rate and monitoring the power of the generator in real time;
and the second starting module is used for starting and executing a power control program of the next power stage when the power of the generator is greater than the power limit value corresponding to the current power stage.
9. A computer device comprising a memory and a processor, the memory storing a program which, when executed by the processor, implements the control method according to any one of claims 1 to 7.
10. A computer-readable storage medium on which a program is stored, the program implementing the control method according to any one of claims 1 to 7 when executed by a processor.
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