CN110500143B - Control method and related components of gas and steam combined cycle generator set - Google Patents
Control method and related components of gas and steam combined cycle generator set Download PDFInfo
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- CN110500143B CN110500143B CN201910802843.6A CN201910802843A CN110500143B CN 110500143 B CN110500143 B CN 110500143B CN 201910802843 A CN201910802843 A CN 201910802843A CN 110500143 B CN110500143 B CN 110500143B
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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
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
- F01K13/02—Controlling, e.g. stopping or starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
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Abstract
The application discloses control method, system, electronic equipment and computer readable storage medium of gas and steam combined cycle generating set, this gas and steam combined cycle generating set include steam turbine and combustion engine group, and the combustion engine group includes N combustion engines, includes: generating a preliminary instruction of the gas turbine according to the target total load, wherein the load corresponding to the preliminary instruction of the gas turbine is smaller than the target total load; acquiring an actual turbine power value of the turbine under the action of the preliminary instruction of the gas turbine; obtaining a gas turbine load correction value by using the actual turbine power value; and obtaining a gas turbine load instruction according to the gas turbine load correction value and the gas turbine preliminary instruction, and controlling the gas turbine set to operate through the gas turbine load instruction so as to drive the gas turbine to operate. This application corrects the combustion engine load instruction through the actual power of steam turbine, can strengthen the deviation of adjusting, and reinforcing control accuracy can not make total power increase suddenly or reduce suddenly simultaneously to can not cause the regulation oscillation, guarantee unit operation safety.
Description
Technical Field
The application relates to the field of generators, in particular to a control method and related components of a gas and steam combined cycle generator set.
Background
In a gas-steam combined cycle generator set, the total load includes a gas turbine load and a steam turbine load, and the steam turbine load changes with the change of the gas turbine load, so the overall load control is relatively complex, the existing scheme generally performs PID (Proportion, Integral, Differential) loop regulation according to the actual total load and the target total load, and after the target total load is set, the gas turbine is controlled to operate according to a gas turbine instruction generated by the target total load, so as to drive the steam turbine to operate.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The application aims to provide a control method and a control system of a gas and steam combined cycle generator set, an electronic device and a computer readable storage medium, wherein a load instruction of a gas turbine is corrected through the actual power of a steam turbine, so that the regulation deviation can be enhanced, the control accuracy is enhanced, and meanwhile, the total power cannot be suddenly increased or reduced, so that the regulation oscillation cannot be caused, and the operation safety of the generator set is ensured.
In order to solve the technical problem, the application provides a control method of a gas and steam combined cycle generator set, the gas and steam combined cycle generator set comprises a steam turbine and a gas turbine set, the gas turbine set comprises N gas turbines, and N is a positive integer, and the control method comprises the following steps:
generating a preliminary instruction of the gas turbine according to a target total load, wherein the load corresponding to the preliminary instruction of the gas turbine is smaller than the target total load;
acquiring an actual turbine power value of the turbine under the action of the preliminary instruction of the gas turbine;
obtaining a gas turbine load correction value by using the actual turbine power value;
and obtaining a gas turbine load instruction according to the gas turbine load correction value and the gas turbine preliminary instruction, and controlling the gas turbine set to operate through the gas turbine load instruction so as to drive the steam turbine to operate.
Preferably, the process of generating the preliminary engine instruction according to the target total load specifically includes:
obtaining a polyline function;
and generating a preliminary instruction of the combustion engine according to the broken line function and the target total load.
Preferably, the process of obtaining the polyline function specifically includes:
and acquiring a broken line function according to the running mode of the combustion engine.
Preferably, the process of obtaining the polyline function specifically includes:
the polyline function is selected by a signal selector.
Preferably, the process of obtaining the combustion engine load correction value by using the actual turbine power value specifically includes:
acquiring an actual combustion engine power value of the combustion engine set under the action of the preliminary combustion engine command;
obtaining a target turbine load according to the actual gas turbine power value;
and obtaining a gas turbine load correction value according to the target turbine load and the actual turbine power value.
Preferably, the process of obtaining the target turbine load through the actual engine power value specifically includes:
and subtracting the target total load from the actual gas turbine power value to obtain a target steam turbine load.
Preferably, the control method further includes:
when all DCS of the combustion engines in the combustion engine set are manually operated and only one combustion engine runs, acquiring a current tracking value, and taking the current tracking value as the load correction value of the combustion engine, wherein the current tracking value is the difference between a current combustion engine instruction set value and a combustion engine instruction initial value;
and when all the DCS of the combustion engines in the combustion engine set are manually operated and all the combustion engines run, acquiring a current tracking value, and taking the current tracking value as the load correction value of the combustion engines, wherein the current tracking value is the difference between the sum of all the combustion engine command set values and the combustion engine command initial value.
In order to solve the technical problem, the present application further provides a control system of a gas and steam combined cycle generator set, the gas and steam combined cycle generator set comprises a steam turbine and a gas turbine set, the gas turbine set comprises N gas turbines, N is a positive integer, and the control system comprises:
the initial instruction generating module is used for generating a preliminary instruction of the gas turbine according to a target total load, wherein the load corresponding to the preliminary instruction of the gas turbine is smaller than the target total load;
the acquisition module is used for acquiring the actual turbine power value of the turbine under the action of the preliminary instruction of the gas turbine;
the correction module is used for obtaining a gas turbine load correction value by utilizing the actual turbine power value;
and the actual instruction generating module is used for obtaining a gas turbine load instruction according to the gas turbine load correction value and the gas turbine preliminary instruction, and controlling the gas turbine set to operate according to the gas turbine load instruction so as to drive the steam turbine to operate.
In order to solve the above technical problem, the present application further provides an electronic device, including:
a memory for storing a computer program;
a processor for implementing the steps of the method of controlling a combined gas and steam cycle power plant as claimed in any one of the preceding claims when executing said computer program.
To solve the above technical problem, the present application further provides a computer-readable storage medium having a computer program stored thereon, where the computer program is executed by a processor to implement the steps of the control method of the gas and steam combined cycle generator set according to any one of the above.
The application provides a control method of a gas and steam combined cycle generator set, corrects a gas turbine load instruction through the actual power of a steam turbine, can enhance the deviation of regulation and enhance the control accuracy, and the load corresponding to the preliminary instruction of the gas turbine is slightly lower than a target total load instruction, so that the total power cannot be suddenly increased or suddenly reduced, regulation oscillation cannot be caused, and the operation safety of the generator set is ensured. The application also provides a control system of the gas and steam combined cycle generator set, an electronic device and a computer readable storage medium, and the control system, the electronic device and the computer readable storage medium have the same beneficial effects as the control method.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the prior art and the embodiments are briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a control device of a gas and steam combined cycle generator set provided by the present application;
FIG. 2 is a flow chart illustrating steps of a method for controlling a combined gas and steam cycle power generation unit according to the present disclosure;
fig. 3 is a diagram illustrating a correspondence between a target total load and a preliminary command of a combustion engine when the combustion engine operates with one engine driving and one engine driving;
FIG. 4 is a diagram illustrating a relationship between a target total load and a preliminary command of a combustion engine during two-drive-one operation of the combustion engine provided by the present application;
FIG. 5 is a schematic structural diagram of a control system of a combined gas and steam cycle power generation unit provided by the present application;
fig. 6 is a schematic structural diagram of an electronic device provided in the present application.
Detailed Description
The core of the application is to provide a control method and a control system of a gas and steam combined cycle generator set, an electronic device and a computer readable storage medium, the load instruction of a gas turbine is corrected through the actual power of a steam turbine, the adjustment deviation can be enhanced, the control accuracy is enhanced, meanwhile, the total power cannot be increased or reduced suddenly, so that the adjustment oscillation cannot be caused, and the operation safety of the generator set is ensured.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the gas-steam combined cycle generator unit, the total load comprises a gas turbine load and a steam turbine load, because the steam turbine load changes along with the change of the gas turbine load, after the target total load is set, the gas turbine is controlled to operate according to a gas turbine instruction generated by the target total load, so that the steam turbine is driven to operate, but when the gas turbine instruction is generated, the response slowness of the steam turbine is not considered, and when the power of the steam turbine is increased, the adjustment oscillation can be caused, so that the damage is brought to the unit operation. Based on the problems, the novel control scheme of the gas and steam combined cycle generator set provided by the following embodiments can achieve the purposes of enhancing the control accuracy, avoiding regulation oscillation and ensuring the operation safety of the generator set.
In order to facilitate understanding of the control method of the present application, a device to which the control method of the present application is applied will be described below. Referring to fig. 1, a schematic structural diagram of a control device of a gas-steam combined cycle generator set according to an embodiment of the application is shown.
The gas-steam combined cycle power generation unit provided by the present application may include: the #1 combustion engine, #2 combustion engine and steam turbine, wherein #1 combustion engine and #2 combustion engine constitute a combustion unit, as shown in fig. 1, the control device includes a PID controller, a balancer, a signal selector, etc., a represents the processed target total load, and f (x)1 and f (x)2 are both polygonal line functions.
Specifically, considering that a controlled starting speed block of the gas turbine can quickly reach the load of the gas turbine corresponding to the load instruction of the gas turbine after receiving the load instruction of the gas turbine, a user sends a target total load instruction to a control device so as to generate the load instruction of the gas turbine through the control device and control the operation of the gas turbine, the generated gas drives a steam turbine to operate after the gas turbine is started, and PID (proportion integration differentiation) adjustment is performed according to the actual total load of the gas turbine and the steam turbine, so that the control of the gas and steam combined cycle generator set is realized. The operation mode of the combustion engine can comprise two-in-one operation of the combustion engine and one-in-one operation of the combustion engine, wherein the two-in-one operation of the combustion engine means that the two combustion engines and the steam turbine both operate, and the one-in-one operation of the combustion engine means that the one combustion engine and the steam turbine operate according to the actual engineering requirements.
The control process of the combined gas and steam cycle power plant will be described in detail below.
Referring to fig. 2, fig. 2 is a flowchart illustrating steps of a control method of a gas and steam combined cycle generator set provided in the present application, the control method including:
s1: generating a preliminary instruction of the gas turbine according to the target total load, wherein the load corresponding to the preliminary instruction of the gas turbine is smaller than the target total load;
the gas and steam combined cycle generator set mentioned in this embodiment may include two combustion engines and one steam turbine, and the operation mode of the combustion engine may be that the combustion engine operates in a manner of two-driving-one operation or one-driving-one operation. During execution of S1 to S4, the internal combustion engine DCS (Distribution Control System) is in an automatic operation state.
Before the step, the operation that a user sends a target total load instruction to a control device of the gas and steam combined cycle generator set can exist, and after the target total load instruction is received, the corresponding target total load is analyzed according to the target total load instruction so as to generate a preliminary instruction of the combustion engine according to the target total load. It can be understood that after the user sets the total load, the target total load is generated through the upper limit, the lower limit and the rate limit.
Specifically, considering that the gas turbine starts to operate and quickly reaches the gas turbine load corresponding to the gas turbine preliminary instruction after receiving the gas turbine preliminary instruction, and after the gas turbine operates, the steam turbine also starts to operate under the action of gas, the power of the steam turbine is increased, and in order to avoid that the actual total load (the sum of the actual gas turbine load and the actual steam turbine load) is greater than the target total load, therefore, the gas turbine load corresponding to the gas turbine preliminary instruction should be less than the target total load, so that the total power cannot be suddenly increased, further, regulation oscillation cannot be caused, and the operation safety of the unit is ensured.
Specifically, taking a one-driving-one operation mode as an example, assuming that the target total load is 100MW, a preliminary engine instruction may be generated according to the engine load of 70MW, and of course, the corresponding relationship between the target total load and the engine load corresponding to the preliminary engine instruction needs to be determined according to actual engineering requirements, which is not limited herein.
S2: acquiring an actual turbine power value of the turbine under the action of the preliminary instruction of the gas turbine;
specifically, according to the above, the combustion engine is started under the action of the preliminary instruction of the combustion engine, the generated gas can drive the steam turbine to operate, after the steam turbine operates, the load of the steam turbine starts to increase, and the actual power value of the steam turbine is obtained, so that the load instruction of the combustion engine is corrected according to the actual power value of the steam turbine. It will be appreciated that modifying the engine load command based on the actual turbine power value of the turbine may enhance the deviation of the regulation and enhance the accuracy of the control.
Specifically, the purpose of this step is to obtain an actual turbine power value of the turbine, and this embodiment may obtain the actual turbine power value of the turbine according to a preset period, or may obtain the actual turbine power value of the turbine after receiving the obtaining instruction, where the trigger condition for obtaining the actual turbine power value is not limited herein.
Furthermore, considering that the load of the steam turbine changes along with the change of the load of the combustion engine and the response of the steam turbine has slowness, the actual power value of the steam turbine can be acquired after the steam turbine operates for a preset time under the action of the primary instruction of the combustion engine, and therefore the reliability of correcting the load instruction of the combustion engine through the actual power value of the steam turbine is improved. Of course, the preset time needs to be set according to actual engineering requirements, and the application is not specifically limited herein.
S3: obtaining a gas turbine load correction value by using the actual turbine power value;
in particular, the aim of this step is to obtain a load correction value for the combustion engine for correcting the preliminary command of the combustion engine from the actual turbine power. As a possible embodiment, the combustion engine load correction value may be in particular the difference between the actual turbine power value and the target turbine load. The method includes the steps of detecting an actual turbine power value and an actual gas turbine power value, detecting according to a preset period, or performing a detection operation after receiving a detection instruction, where trigger conditions for detecting the actual turbine power value and the actual gas turbine power value are not limited, and of course, the actual turbine power value and the actual gas turbine power value may be detected at the same time or may not be the same. Furthermore, the actual power value of the steam turbine and the actual power value of the combustion engine can be detected through detection equipment in the existing control device, and the cost is saved. The target turbine load can be specifically a difference value between the target total load and the actual gas turbine power, and PI operation is performed on the target turbine load and the actual turbine power value to obtain a gas turbine load correction value.
Specifically, if the target total load is 100MW, the actual gas turbine power is 70MW under the action of the preliminary command of the gas turbine, the target turbine load should be 30MW, and if the obtained actual turbine power is 20MW, the gas turbine load correction value is 10 MW.
S4: and obtaining a gas turbine load instruction according to the gas turbine load correction value and the gas turbine preliminary instruction, and controlling the gas turbine set to operate through the gas turbine load instruction so as to drive the gas turbine to operate.
Specifically, the method aims to determine a gas turbine load instruction, wherein the gas turbine load instruction can be obtained through a gas turbine load correction value and a gas turbine preliminary instruction, assuming that the gas turbine load corresponding to the gas turbine preliminary instruction is a, the gas turbine load correction value is b, when a gas and steam combined cycle generator set runs according to one-to-one operation, the gas turbine load instruction is generated according to a + b, and when the gas and steam combined cycle generator set runs according to two-to-one operation, the gas turbine load instruction of each gas turbine is generated according to (a + b)/2. It can be understood that, during the operation of the gas and steam combined cycle generator set, the load command of the combustion engine may need to be adjusted for multiple times, so that the load command of the combustion engine adjusted last time is taken as the initial command of the combustion engine at the current time, and S2 to S4 are repeated.
According to the control method of the gas and steam combined cycle generator set, the load instruction of the gas turbine is corrected through the actual power of the steam turbine, the adjusting deviation can be enhanced, the control accuracy is enhanced, the load corresponding to the initial instruction of the gas turbine is slightly lower than the target total load instruction, the total power cannot be increased or reduced suddenly, adjusting oscillation cannot be caused, and the running safety of the generator set is guaranteed.
On the basis of the above-described embodiment:
as a preferred embodiment, the process of generating the preliminary engine instruction according to the target total load is specifically as follows:
obtaining a polyline function;
and generating a preliminary command of the combustion engine according to the broken line function and the target total load. As a preferred embodiment, the process of obtaining the polyline function specifically includes:
and acquiring a broken line function according to the running mode of the combustion engine.
Specifically, the load instruction of the combustion engine is generated by the target total load according to a broken line function, and the preliminary instruction of the combustion engine can be rapidly generated by adopting the broken line function, so that the adjusting speed can be greatly increased. The polyline function can be confirmed according to the specification of the combustion engine, and is generally about 70% at present. Considering that the operation mode of the combustion engine is divided into one-drag-one operation and two-drag-one operation, when the one-drag-one operation is carried out, a combustion engine preliminary instruction is generated by a broken line function F (X1), and the combustion engine preliminary instruction is added with a load correction value to be used as a combustion engine load instruction for currently operating the combustion engine; when the two-in-one engine runs, the preliminary instruction of the combustion engine is generated by a broken line function F (X2), and after the preliminary instruction of the combustion engine and a load correction value are added, the preliminary instruction of the combustion engine is used as the load instruction of the combustion engine which runs at present, and the load instruction of the combustion engine is averagely distributed to the two combustion engines.
Taking two 72MW combustion engines as an example, a polyline function F (X1) is shown in table 1 and fig. 3, table 1 is a table of correspondence between target total load and combustion engine preliminary command, a polyline function F (X2) is shown in table 2 and fig. 4, table 1 is a table of correspondence between target total load and combustion engine preliminary command when the combustion engine operation mode is one-to-one operation, and table 2 is a table of correspondence between target total load and combustion engine preliminary command when the combustion engine operation mode is two-to-one operation.
TABLE 1 Table of correspondence between target total load and preliminary instructions of gas turbine during one-to-one operation
| | Y1 | |
| 0 | 0 | |
| 72 | 52 | |
| 200 | 52 |
TABLE 2 corresponding relation table of target total load and preliminary instructions of gas turbine in two-drive-one operation
| | Y2 | |
| 0 | 0 | |
| 144 | 104 | |
| 150 | 104 |
The X1 and the X2 are target total loads, the Y1 and the Y2 are total loads of the combustion engine corresponding to the preliminary command of the combustion engine, it can be seen easily by referring to the tables 1 and 2 that the rated power of the combustion engine also needs to be considered when the preliminary command of the combustion engine is generated, and when the target total load is larger than the rated power of the combustion engine, the preliminary command of the combustion engine is generated according to the rated power of the combustion engine, so that the safe operation of a unit is ensured. As a possible implementation, the process of obtaining the polyline function specifically includes: the polyline function is selected by a signal selector.
As a preferred embodiment, the control method further includes:
when DCS of all combustion engines in the combustion engine set is manually operated and only one combustion engine runs, acquiring a current tracking value, and taking the current tracking value as a load correction value of the combustion engine, wherein the current tracking value is the difference between a current combustion engine instruction set value and a combustion engine instruction initial value;
when the DCS of all the combustion engines in the combustion engine set is manually operated and all the combustion engines run, acquiring a current tracking value, and taking the current tracking value as a load correction value of the combustion engines, wherein the current tracking value is the difference between the sum of instruction set values of all the combustion engines and an instruction initial value of the combustion engines.
Specifically, in order to avoid disturbance, when the #1 combustion engine and the #2 combustion engine DCS are both manually operated, the load correction loop is in a tracking state, and when only the #1 combustion engine runs, a tracking value is the difference between the combustion engine load instruction of the #1 combustion engine and the combustion engine preliminary instruction of the #1 combustion engine; when only the #2 combustion engine runs, the tracking value is the difference between the combustion engine load instruction of the #2 combustion engine and the combustion engine preliminary instruction of the #2 combustion engine; when the two combustion engines are operated, the tracking value is the difference between the sum of the set values of the two combustion engine commands and the preliminary command of the combustion engine.
In conclusion, the method and the device have the advantages that the broken line function is adopted, the preliminary instruction of the gas turbine can be rapidly generated, and the adjusting speed is greatly increased; the actual turbine power of the turbine is adopted to correct the preliminary instruction of the gas turbine, so that the adjustment deviation can be enhanced, and the accuracy is enhanced; the load of the combustion engine corresponding to the preliminary command of the combustion engine is slightly lower than the target total load, and the total power cannot be suddenly increased and suddenly reduced.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a control system of a gas and steam combined cycle generator set provided in the present application, the gas and steam combined cycle generator set includes a steam turbine and a combustion engine set, the combustion engine set includes N combustion engines, N is a positive integer, and the control system of the gas and steam combined cycle generator set includes:
the preliminary instruction generating module 1 is used for generating a preliminary instruction of the gas turbine according to the target total load, wherein the load corresponding to the preliminary instruction of the gas turbine is smaller than the target total load;
the acquisition module 2 is used for acquiring the actual turbine power value of the turbine under the action of the preliminary instruction of the gas turbine;
the correction module 3 is used for obtaining a gas turbine load correction value by utilizing the actual turbine power value;
and the actual instruction generating module 4 is used for obtaining a gas turbine load instruction according to the gas turbine load correction value and the gas turbine preliminary instruction, and controlling the gas turbine set to operate through the gas turbine load instruction so as to drive the gas turbine to operate.
As a preferred embodiment, the preliminary instruction generating module 1 includes:
a curve obtaining unit for obtaining a polyline function;
and the command generating unit is used for generating a preliminary command of the combustion engine according to the broken line function and the target total load.
As a preferred embodiment, the obtaining unit is specifically configured to:
and acquiring a broken line function according to the running mode of the combustion engine.
As a preferred embodiment, the obtaining unit is specifically configured to:
the polyline function is selected by a signal selector.
As a preferred embodiment, the corrective module 3 comprises:
the power acquisition unit is used for acquiring the actual gas turbine power value of the gas turbine group under the action of the preliminary instruction of the gas turbine;
the calculation unit is used for obtaining a target steam turbine load through the actual power value of the gas turbine;
and the correcting unit is used for obtaining a gas turbine load correcting value according to the target turbine load and the actual turbine power value.
As a preferred embodiment, the computing unit is specifically configured to:
and (4) subtracting the power value of the target total load and the actual gas turbine to obtain the target steam turbine load.
As a preferred embodiment, the control system further comprises:
the tracking unit is used for acquiring a current tracking value when the DCS of all the combustion engines in the combustion engine set are manually operated and only one combustion engine runs, and taking the current tracking value as a combustion engine load correction value, wherein the current tracking value is the difference between a current combustion engine instruction set value and a combustion engine instruction initial value; and the method is also used for acquiring a current tracking value when the DCS of all the combustion engines in the combustion engine set are manually operated and all the combustion engines run, and taking the current tracking value as a combustion engine load correction value, wherein the current tracking value is the difference between the sum of all combustion engine command set values and the combustion engine command initial value.
The control system of the gas and steam combined cycle generator set has the same beneficial effects as the control method.
Please refer to the above embodiments for the introduction of the control system of the gas and steam combined cycle generator set provided by the present application, which is not described herein again.
On the other hand, referring to fig. 6, the present application further provides a schematic structural diagram of an electronic device, where the gas and steam combined cycle power generation unit includes a steam turbine and a combustion engine set, the combustion engine set includes N combustion engines, where N is a positive integer, and the electronic device 2100 of this embodiment may include: a processor 2101 and a memory 2102.
Optionally, the electronic device 2100 may also include a communication interface 2103, an input unit 2104, and a display 2105 and a communication bus 2106.
The processor 2101, the memory 2102, the communication interface 2103, the input unit 2104, the display 2105, and the like communicate with each other via the communication bus 2106.
In the embodiment of the present application, the processor 2101 may be a Central Processing Unit (CPU), an application specific integrated circuit (asic), a digital signal processor, an off-the-shelf programmable gate array (fpga) or other programmable logic device.
The memory 2102 stores one or more programs, which may include program codes including computer operation instructions, and in this embodiment, the memory 2102 stores at least the following programs for implementing the following functions:
generating a preliminary instruction of the gas turbine according to the target total load, wherein the load corresponding to the preliminary instruction of the gas turbine is smaller than the target total load;
acquiring an actual turbine power value of the turbine under the action of the preliminary instruction of the gas turbine;
obtaining a gas turbine load correction value by using the actual turbine power value;
and obtaining a gas turbine load instruction according to the gas turbine load correction value and the gas turbine preliminary instruction, and controlling the gas turbine set to operate through the gas turbine load instruction so as to drive the gas turbine to operate.
It is understood that the processor 2101 may invoke programs stored in the memory 2102.
Therefore, the load instruction of the gas turbine can be corrected through the actual power of the gas turbine, the adjustment deviation can be enhanced, the control accuracy is enhanced, the load corresponding to the preliminary instruction of the gas turbine is slightly lower than the target total load instruction, the total power cannot be increased or decreased suddenly, the adjustment oscillation cannot be caused, and the unit operation safety is guaranteed.
In one possible implementation, the memory 2102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the computer.
Further, the memory 2102 may include high speed random access memory, and may also include non-volatile memory, such as at least one disk storage device or other volatile solid state storage device.
The communication interface 2103 may be an interface of a communication module.
The present application may also include a display 2104 and an input unit 2105, among others.
Of course, the device structure shown in fig. 6 does not constitute a limitation of the electronic device in the embodiment of the present application, and in practical applications, the electronic device may include more or less components than those shown in fig. 6, or some components may be combined.
In order to solve the above technical problem, the present application further provides a computer readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the control method of the gas and steam combined cycle generator set as any one of the above.
The computer-readable storage medium provided by the application has the same beneficial effects as the control method.
For the introduction of a computer-readable storage medium provided in the present application, please refer to the above embodiments, which are not described herein again.
It should also be noted that, in the present specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A control method of a gas and steam combined cycle generator set comprises a steam turbine and a gas turbine set, wherein the gas turbine set comprises N gas turbines, N is a positive integer, and the control method comprises the following steps:
generating a preliminary instruction of the gas turbine according to a target total load, wherein the load corresponding to the preliminary instruction of the gas turbine is smaller than the target total load;
acquiring an actual turbine power value of the turbine when the turbine is driven to operate by the gas turbine set after the gas turbine set operates under the action of the preliminary instruction of the gas turbine;
obtaining a gas turbine load correction value by using the actual turbine power value;
and obtaining a gas turbine load instruction according to the gas turbine load correction value and the gas turbine preliminary instruction, and controlling the gas turbine set to operate through the gas turbine load instruction so as to drive the steam turbine to operate.
2. The control method of the gas and steam combined cycle generator set according to claim 1, wherein the process of generating the preliminary command of the combustion engine according to the target total load is specifically:
obtaining a polyline function;
and generating a preliminary instruction of the combustion engine according to the broken line function and the target total load.
3. The control method of the gas and steam combined cycle generator set according to claim 2, wherein the process of obtaining the polyline function is specifically:
and acquiring a broken line function according to the running mode of the combustion engine.
4. The control method of the gas and steam combined cycle generator set according to claim 2, wherein the process of obtaining the polyline function is specifically:
the polyline function is selected by a signal selector.
5. The control method of the gas and steam combined cycle generator set according to claim 1, wherein the process of obtaining the gas turbine load correction value by using the actual turbine power value specifically comprises:
acquiring an actual combustion engine power value of the combustion engine set under the action of the preliminary combustion engine command;
obtaining a target turbine load according to the actual gas turbine power value;
and obtaining a gas turbine load correction value according to the target turbine load and the actual turbine power value.
6. The control method of the gas and steam combined cycle generator set according to claim 5, wherein the process of obtaining the target turbine load from the actual engine power value specifically comprises:
and subtracting the target total load from the actual gas turbine power value to obtain a target steam turbine load.
7. The control method of the gas and steam combined cycle power plant as claimed in any one of claims 1 to 6, further comprising:
when all DCS of the combustion engines in the combustion engine set are manually operated and only one combustion engine runs, acquiring a current tracking value, and taking the current tracking value as the load correction value of the combustion engine, wherein the current tracking value is the difference between a current combustion engine instruction set value and a combustion engine instruction initial value;
and when all the DCS of the combustion engines in the combustion engine set are manually operated and all the combustion engines run, acquiring a current tracking value, and taking the current tracking value as the load correction value of the combustion engines, wherein the current tracking value is the difference between the sum of all the combustion engine command set values and the combustion engine command initial value.
8. The utility model provides a control system of gas and steam combined cycle generating set, this gas and steam combined cycle generating set include steam turbine and combustion engine group, including N combustion engines in the combustion engine group, N is positive integer, its characterized in that, this control system includes:
the initial instruction generating module is used for generating a preliminary instruction of the gas turbine according to a target total load, wherein the load corresponding to the preliminary instruction of the gas turbine is smaller than the target total load;
the acquiring module is used for acquiring the actual turbine power value of the turbine when the gas turbine set is driven to operate by the gas turbine under the action of the preliminary instruction of the gas turbine;
the correction module is used for obtaining a gas turbine load correction value by utilizing the actual turbine power value;
and the actual instruction generating module is used for obtaining a gas turbine load instruction according to the gas turbine load correction value and the gas turbine preliminary instruction, and controlling the gas turbine set to operate according to the gas turbine load instruction so as to drive the steam turbine to operate.
9. An electronic device, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the method of controlling a combined gas and steam cycle power plant according to any one of claims 1 to 7 when executing said computer program.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for controlling a combined gas and steam cycle power plant according to any one of claims 1 to 7.
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| CN111535885B (en) * | 2020-04-26 | 2022-04-08 | 中国大唐集团科学技术研究院有限公司华东电力试验研究院 | Power distribution method and device for gas-steam combined cycle unit |
| CN111828117B (en) * | 2020-07-09 | 2022-09-23 | 北京京桥热电有限责任公司 | Heat supply control method, device and system for gas-steam combined cycle unit |
| CN113266469B (en) * | 2021-05-13 | 2022-06-14 | 青岛中科鲁控燃机控制***工程有限公司 | Combustion engine optimization control system and method based on distributed control system |
| CN114320492A (en) * | 2022-01-05 | 2022-04-12 | 国家能源集团国源电力有限公司 | Method and device for power load unbalance protection of steam turbine set and electronic equipment |
| CN116826770A (en) * | 2023-07-07 | 2023-09-29 | 北京怀柔实验室 | Unit load lifting method, device, equipment and medium |
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