CN112432155A - Decoupling control method and system for power plant steam generator water supply system - Google Patents
Decoupling control method and system for power plant steam generator water supply system Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/26—Automatic feed-control systems
- F22D5/32—Automatic feed-control systems influencing the speed or delivery pressure of the feed pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D5/00—Controlling water feed or water level; Automatic water feeding or water-level regulators
- F22D5/26—Automatic feed-control systems
- F22D5/34—Applications of valves
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Abstract
The invention provides a decoupling control method and a decoupling control system for a steam generator water supply system of a power plant, which comprise the following steps: acquiring an input quantity parameter and an output quantity parameter of a steam generator water supply system; obtaining a first transfer function matrix based on the input quantity parameter and the output quantity parameter; obtaining an equivalent input parameter of a steam generator water supply system according to the decoupled output parameter, and obtaining a second transfer function matrix based on the equivalent input parameter and the output parameter; judging whether the first transfer function matrix is reversible or not, and obtaining a feedforward matrix based on the inverse matrix of the first transfer function matrix and the second transfer function matrix; and applying the feedforward matrix to a water supply system to be decoupled so as to realize the decoupling control of the water supply flow of the steam generator. The invention decouples the water supply system of the multi-input multi-output steam generator into a plurality of single-input single-output systems so as to respectively implement control, can greatly shorten the water supply regulation time, improve the dynamic response performance and lay the foundation for the control of the steam generator.
Description
Technical Field
The invention relates to the technical field of control of power plant power systems, in particular to a decoupling control method and a decoupling control system for a power plant steam generator water supply system.
Background
The steam generator is one of the main devices of the power system of the power plant, and the main function of the steam generator is to transfer the heat generated by the primary loop reactor to the secondary loop feed water, so that the secondary loop feed water is changed into steam with a certain temperature and pressure. In the operation process of the natural circulation steam generator, the water level of the natural circulation steam generator needs to be controlled within a certain range, if the water level of the steam generator is too low, the operation safety of a power system and the heat transfer performance of the steam generator can be affected, and if the water level is too high, the steam-water separation effect is poor, and the service life of a steam turbine blade in the steam generator is damaged. Therefore, in practice, the feed water flow rate is usually adjusted as a control means for maintaining the water level of the steam generator at a set height, i.e. by increasing or decreasing the feed water flow rate of the steam generator to maintain the water level of the steam generator from being too high or too low. Therefore, it is very important to ensure the water level control performance of the steam generator through the feedwater regulating system.
However, the above-mentioned feed water regulating system is a two-input two-output coupling system formed by using the opening of the feed water valve and the rotation speed of the feed water pump as inputs and using the pressure difference between the feed water header and the steam header and the feed water flow as outputs, and two input parameters and two output parameters are mutually influenced. It is just because of the coupling characteristics of this system that the regulation time of feedwater flow is long, the dynamic performance is poor. The decoupling control of the water supply flow of the steam generator is urgently needed to be realized, the dynamic response performance of the water supply flow is fundamentally improved, and a foundation is laid for realizing the excellent water level control performance of the steam generator.
Disclosure of Invention
Aiming at the defects or the improvement requirements of the prior art, the invention provides a decoupling control method and a decoupling control system for a steam generator water supply system of a power plant.
To achieve the above object, according to a first aspect of the present invention, there is provided a decoupling control method for a steam generator water supply system of a power plant, the method comprising:
acquiring an input quantity parameter and an output quantity parameter of a steam generator water supply system; obtaining a first transfer function matrix based on the input quantity parameters and the output quantity parameters by a model identification method;
obtaining an equivalent input parameter of the steam generator water supply system according to the decoupled output parameter, and obtaining a second transfer function matrix based on the equivalent input parameter and the output parameter;
judging whether the first transfer function matrix is reversible, if so, meeting a decoupling condition, and obtaining a feedforward matrix based on an inverse matrix of the first transfer function matrix and a second transfer function matrix;
and applying the feedforward matrix to a water supply system to be decoupled, thereby realizing the decoupling control of the water supply flow of the steam generator.
Further, the obtaining input quantity parameters and output quantity parameters of the steam generator water supply system comprises:
obtaining the opening degree of a water supply valve and the rotating speed of the water supply pump in the water supply system as input quantity parameters;
and obtaining the pressure difference between a water supply header and a steam header in the water supply system and the water supply flow as output parameters.
Further, the method for model identification, wherein obtaining a transfer function matrix based on the input quantity parameter and the output quantity parameter comprises:
respectively establishing a transfer function G(s) of pressure difference between a water supply collecting pipe and a steam collecting pipe to the opening degree of a water supply valve, a transfer function G(s) of water supply flow to the opening degree of the water supply valve, a transfer function G(s) of pressure difference between the water supply collecting pipe and the steam collecting pipe to the rotating speed of a water supply pump, and a transfer function G(s) of water supply flow to the rotating speed of the water supply pump through experimental model identification;
obtaining a first transfer function matrix
Further, the obtaining the equivalent input parameter of the steam generator water supply system according to the decoupled output parameter comprises:
obtaining the equivalent water feeding pump rotating speed according to a preset reference pressure difference between the water collecting pipe and the steam collecting pipe after decoupling; obtaining the equivalent water supply valve opening according to the preset decoupled water supply reference flow;
and taking the rotating speed of the equivalent water feeding pump and the opening degree of the equivalent water feeding valve as equivalent input quantity parameters.
Further, the obtaining a second transfer function matrix based on the equivalent input quantity parameter and the output quantity parameter includes:
respectively establishing a transfer function W of the pressure difference between the water header and the steam header to the rotating speed of the equivalent water feeding pump11(s) transfer function W of feed water flow to equivalent feed water valve opening22(s)；
Obtaining a second transfer function matrix
Further, the feed forward matrix is
Wherein,
is the inverse of the first transfer function matrix, and W(s) is the second transfer function matrix.
According to a second aspect of the invention, there is provided a system using the decoupled control method for a power plant steam generator feedwater system as described above, the system comprising a first controller, a second controller, a decoupled control module; the first controller and the second controller are respectively in communication connection with the decoupling control module, and the decoupling control module is in control connection with the steam generator water supply system; wherein,
the first controller is used for receiving a preset reference pressure difference signal between the water collecting pipe and the steam collecting pipe after decoupling, and outputting an equivalent water feeding pump rotating speed signal;
the second controller is used for receiving a preset decoupled feed water reference flow signal and outputting an equivalent feed water valve opening signal;
the decoupling control module is used for receiving the equivalent feed pump rotating speed signal and the equivalent feed valve opening signal to establish a feed-forward matrix, and outputting a differential pressure signal between the decoupled water header and the steam header and a decoupled feed water flow signal based on the feed-forward matrix, so that decoupling control is performed on the feed water system.
Further, the decoupling control module comprises a feed-forward compensator and a feed-water controller to be decoupled; wherein,
the feedforward compensator is used for receiving the equivalent water feeding pump rotating speed signal and the equivalent water feeding valve opening signal to establish a feedforward matrix;
the feed-water controller to be decoupled is based on the feed-forward matrix, so that the feed-water flow is only controlled by the opening of the equivalent feed-water valve, and the pressure difference between the feed-water collecting pipe and the steam collecting pipe is only controlled by the rotating speed of the equivalent feed-water pump, thereby realizing the decoupling of the feed-water system.
According to a third aspect of the invention, there is provided an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the method as described above when executing the computer program.
According to a fourth aspect of the invention, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method as described above.
Generally, compared with the prior art, the above technical solution conceived by the present invention has the following beneficial effects:
the invention provides a decoupling control method and a decoupling control system for a steam generator water supply system of a power plant, which mainly aim at the coupling problem of pressure difference between a water supply header and a steam header and water supply flow under the combined action of the opening of a water supply valve and the rotating speed of a water supply pump in the steam generator water supply system, and decouple the multi-input and multi-output water supply system by connecting a decoupling control module in series in front of an original system, so that the water supply flow at the outlet of a regulating valve is only influenced by the opening of an equivalent regulating valve, and further can be used as a single-input and single-output system to be controlled, thereby greatly shortening the water supply regulating time, improving the dynamic response performance and laying a foundation for improving the water level control performance of a steam generator.
Drawings
FIG. 1 is a schematic diagram of a feedwater system of a conventional power plant steam generator;
FIG. 2 is a schematic diagram of the input, output and mutual transmission relationship before decoupling of the existing water supply system;
FIG. 3 is a schematic diagram of the input, output and mutual transmission relationship after decoupling implemented in accordance with the present invention;
FIG. 4 is an exemplary diagram of a decoupled control system configuration for a power plant steam generator water supply system implemented in accordance with the present invention;
FIG. 5 is a diagram of an exemplary architecture of a decoupled control module in a decoupled control system for a power plant steam generator water supply system implemented in accordance with the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
It should be noted that in the functional equations of the present invention, "-" is an operation symbol representing the multiplication of two constants or vectors before and after the operation symbol, and "-" is an operation symbol representing the subtraction of two constants or vectors before and after the operation symbol, and all the functional equations of the present invention follow the mathematical operation of addition, subtraction, multiplication and division.
It should be noted that the term "first \ second" referred to in the present invention is only used for distinguishing similar objects, and does not represent a specific ordering for the objects, and it should be understood that "first \ second" may be interchanged in a specific order or sequence, if allowed. It should be understood that "first \ second" distinct objects may be interchanged under appropriate circumstances such that embodiments of the invention described herein may be practiced in sequences other than those described or illustrated herein.
It is known that a steam generator is one of the main equipments of a power system of a power plant, and during the operation of the steam generator, a water supply system is required to control the water level of the steam generator within a certain range. As shown in fig. 1, because the steam generator in the power system of the power plant has a large feed water flow and a wide adjustment range, the feed water system usually uses a centrifugal water pump driven by an electric motor and is matched with a feed water adjustment valve to adjust the feed water flow. The steam generator water supply system of the existing power plant is generally realized by adjusting the opening degree of a water supply valve and controlling the rotating speed of the water supply pump, and the existing water supply control method comprises the following steps: after receiving the water supply flow regulation instruction, the water supply valve firstly executes regulation to change the water supply flow, meanwhile, the regulation can cause the pressure difference between the water supply collecting pipe and the steam collecting pipe to change, the controller further issues an instruction of regulating the rotating speed of the water supply pump to maintain the constant pressure difference between the water supply collecting pipe and the steam collecting pipe, the opening of the water supply valve is further regulated to meet the water supply flow demand in the dynamic regulation process, and the circulation is repeated, so that the regulation of the water supply flow of the steam generator is completed. Obviously, in the above-mentioned water supply control process, the change of the rotation speed of the water supply pump and the opening of the water supply valve are processes following each other, and the process inevitably results in overlong water supply adjusting time and poor dynamic performance, which is not beneficial to the stable control of the water level of the steam generator in the power system of the power plant.
Theoretically, the inventor finds that the water supply system is a two-input and two-output coupling system formed by taking the opening degree of a water supply valve and the rotating speed of a water supply pump as input and taking the pressure difference between a water supply header and a steam header and the water supply flow as output, as shown in fig. 2, two input parameters and two output parameters are mutually influenced, and the coupling characteristic of the system only causes the overlong adjusting time and the poor dynamic performance of the water supply flow. Therefore, only by realizing the decoupling control of the water supply flow of the steam generator, the water supply flow is only influenced by the opening degree of the water supply valve (actually equivalent to the opening degree of the water supply valve), so that the water supply flow is adjusted into a single-input single-output control system, and the dynamic response performance of the water supply flow is fundamentally improved.
Thus, according to a specific embodiment of the present invention, there is provided a decoupled control method for a power plant steam generator feedwater system, the method comprising:
s1: acquiring an input quantity parameter and an output quantity parameter of a steam generator water supply system; obtaining a transfer function matrix based on the input quantity parameter and the output quantity parameter by a model identification method;
s2: obtaining an equivalent input parameter of a steam generator water supply system according to the decoupled output parameter, and obtaining a target transfer function matrix based on the equivalent input parameter and the output parameter;
s3: judging whether the transfer function matrix is reversible, if so, meeting a decoupling condition, and obtaining a feedforward matrix based on an inverse matrix of the transfer function matrix and the target transfer function matrix;
s4: and applying the feedforward matrix to a water supply system to be decoupled so as to realize the decoupling control of the water supply flow of the steam generator.
Specifically, in step S1, the input (control) parameters U of the steam generator water supply system are mainly the water supply valve opening k and the water supply pump rotation speed ω, i.e., U ═ k, ω, in the water supply system]T(ii) a The output quantity (controlled quantity) parameter Y of the water supply system mainly comprises a pressure difference delta p between a water supply header and a steam header and a water supply flow m, namely Y ═ delta p, m]T. As shown in fig. 2, after the two sets of parameters are determined, a coupling relationship function between the two sets of parameters is established according to the input quantity parameter U and the output quantity parameter Y, and a transfer function matrix is established based on the coupling relationship function, which specifically includes the following steps:
s101: obtaining the opening k of a water supply valve in a water supply system and the rotation speed omega of a water supply pump as input quantity parameters U; and obtaining the pressure difference delta p between the water supply header and the steam header of the water supply system and the water supply flow m as an output parameter Y.
S102: model identification is carried out through experiments to respectively establish a transfer function G of the pressure difference delta p between the water supply header and the steam header to the opening k of the water supply valve11(s) transfer function G of feed water flow m to feed water valve opening k21(s) transfer function G of pressure difference delta p between feed header and steam header to feed pump speed omega12(s) transfer function G of feed water flow m to feed water pump rotation speed omega22(s)；
Specifically, s in the function represents an imaginary variable, and s corresponds to t in the real number domain, both representing variables in space. S is the same hereinafter and will not be described in detail.
S103: obtaining a transfer function matrix of the output quantity parameter Y(s) to the input quantity parameter U(s) according to the four transfer functions
Specifically, in step S2, the expected dynamic performance of the water supply system is determined, and a target transfer function matrix between the decoupled output quantity and the equivalent input quantity is given. As shown in fig. 3, the specific steps include:
s201: according to the preset reference pressure difference delta p between the water header and the steam header after decouplingrefObtaining the equivalent water feeding pump rotating speed omega'; according to the preset decoupling water supply reference flow mrefObtaining an equivalent water supply valve opening k'; and taking the equivalent water feeding pump rotating speed omega 'and the equivalent water feeding valve opening k' as equivalent input quantity parameters.
S202: respectively establishing a transfer function W of the pressure difference delta p between the water header and the steam header to the rotation speed omega' of the equivalent water feeding pump11(s) transfer function W of feed water flow m to equivalent feed water valve opening k22(s); more specifically, consider generally W11(s) and W22(s) is a first order inertia, not exceeding a second order at most;
s203: obtaining a target transfer function matrix
Specifically, in step S3, the transfer function matrix W is determined0Inverse matrix of(s)
If so, the decoupling condition is satisfied, and then a feed-forward matrix can be obtained.
More specifically, the feed forward matrix isWherein,is the inverse of the transfer function matrix, and W(s) is the target transfer function matrix.
Specifically, in step S4, the feed-forward matrix algorithm is placed in front of the water supply system to be decoupled, so that the water supply flow m at the outlet of the regulating valve is only controlled by the equivalent water supply opening k ', and the pressure difference Δ p between the water supply header and the steam header is only controlled by the equivalent water supply pump rotation speed ω', thereby achieving the decoupling of the system.
According to another specific embodiment of the invention, there is provided a system using the decoupled control method for a power plant steam generator feedwater system as described above, the system comprising a first controller, a second controller, a decoupled control module; the first controller and the second controller are respectively in communication connection with the decoupling control module, and the decoupling control module is in control connection with a steam generator water supply system; wherein, a first controller C is respectively designed, which takes the equivalent feed pump rotation speed omega 'and the equivalent feed valve opening k' as controlled variables, and takes the pressure difference delta p between the feed header and the steam header and the outlet feed water flow m of the feed valve as controlled variables1(s) and a second controller C2(s) as shown in fig. 4, the system comprises a first controller, a second controller, a decoupling control module; the first controller and the second controller are respectively in communication connection with the decoupling control module, and the decoupling control module is in control connection with the steam generator water supply system; wherein,
first controller C1(s) for receiving a predetermined decoupled reference pressure differential Δ p between the water header and the steam headerrefThe signals are output, and an equivalent water feeding pump rotating speed omega' signal is output;
second controller C2(s) for receiving a preset decoupled feedwater reference flow mrefThe signal is output, and an equivalent water supply valve opening k' signal is output;
the decoupling control module is used for receiving an equivalent water feeding pump rotating speed omega 'signal and an equivalent water feeding valve opening k' signal to establish a feedforward matrix, and outputting a differential pressure delta p signal between the decoupled water collecting pipe and the steam collecting pipe and a decoupled water feeding flow m signal based on the feedforward matrix, so that decoupling control is performed on a water feeding system.
Specifically, the decoupling control module comprises a feedforward compensator and a feed water controller to be decoupled; as shown in fig. 5:
the feedforward compensator is used for receiving an equivalent water feeding pump rotating speed omega 'signal and an equivalent water feeding valve opening k' signal to establish a feedforward matrix;
the feed-water controller to be decoupled is based on a feed-forward matrix, so that the feed-water flow m is only controlled by the opening k 'of the equivalent feed-water valve, and the pressure difference delta p between the feed-water header and the steam header is only controlled by the rotating speed omega' of the equivalent feed-water pump, thereby realizing the decoupling of the feed-water system.
More specifically, the feedforward compensator further comprises a first transfer function matrix calculation module, a first transfer function matrix calculation module and a feedforward matrix calculation module, wherein;
the first transfer function matrix calculation module is used for obtaining a first transfer function matrix according to the obtained input quantity parameters and output quantity parameters of the water supply system;
the second transfer function matrix calculation module is used for receiving the equivalent water feeding pump rotating speed signal and the equivalent water feeding valve opening signal to obtain an equivalent input parameter and obtaining a second transfer function matrix according to the equivalent input parameter and the output parameter;
the feedforward matrix calculation module is used for receiving the first transfer function matrix and the second transfer function matrix, judging whether the first transfer function is reversible or not, and if the first transfer function is reversible, obtaining a feedforward matrix according to the inverse matrix of the first transfer function matrix and the second transfer function matrix.
The present invention further provides an electronic device based on the above embodiments, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the method is implemented.
The present invention is also based on the above-mentioned embodiments and a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the method as described above.
It should be understood that any process or method descriptions of methods, structures, or steps described herein that are in a block diagram or otherwise may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps in the process, and that the scope of embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including in substantially the same way or in an opposite order depending on the functionality involved, as would be understood by those reasonably skilled in the art of embodiments of the present invention.
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.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A decoupled control method for a power plant steam generator feedwater system, the method comprising:
acquiring an input quantity parameter and an output quantity parameter of a steam generator water supply system; obtaining a first transfer function matrix based on the input quantity parameter and the output quantity parameter;
obtaining an equivalent input parameter of the steam generator water supply system according to the decoupled output parameter, and obtaining a second transfer function matrix based on the equivalent input parameter and the output parameter;
judging whether the first transfer function matrix is reversible or not, if so, meeting a decoupling condition, and obtaining a feedforward matrix based on an inverse matrix of the first transfer function matrix and a second transfer function matrix;
and applying the feedforward matrix to a water supply system to be decoupled, thereby realizing the decoupling control of the water supply flow of the steam generator.
2. The control method for a power plant steam generator water supply system of claim 1, wherein the obtaining input and output parameters of the steam generator water supply system comprises:
obtaining the opening degree of a water supply valve and the rotating speed of the water supply pump in the water supply system as input quantity parameters;
and obtaining the pressure difference between a water supply header and a steam header in the water supply system and the water supply flow as output parameters.
3. The control method for a power plant steam generator feedwater system of claim 2, wherein the obtaining a transfer function matrix based on the input quantity parameter and output quantity parameter comprises:
model identification is carried out through experiments to respectively establish a transfer function G of the pressure difference between the water supply collecting pipe and the steam collecting pipe to the opening degree of the water supply valve11(s) transfer function G of feed water flow to feed water valve opening21(s) transfer function G of pressure difference between feed water header and steam header to feed water pump rotation speed12(s) transfer function G of feed water flow to feed water pump speed22(s)；
Obtaining a first transfer function matrix
4. The control method for a steam generator water supply system of a power plant of claim 1, wherein the obtaining the equivalent input parameter of the steam generator water supply system from the decoupled output parameter comprises:
obtaining the equivalent water feeding pump rotating speed according to a preset reference pressure difference between the water collecting pipe and the steam collecting pipe after decoupling; obtaining the equivalent water supply valve opening according to the preset decoupled water supply reference flow;
and taking the rotating speed of the equivalent water feeding pump and the opening degree of the equivalent water feeding valve as equivalent input quantity parameters.
5. The control method for a power plant steam generator feedwater system of claim 4, wherein the deriving a second transfer function matrix based on the equivalent input and output quantity parameters comprises:
respectively establishing a transfer function W of the pressure difference between the water header and the steam header to the rotating speed of the equivalent water feeding pump11(s) transfer function W of feed water flow to equivalent feed water valve opening22(s)；
Obtaining a second transfer function matrix
6. The control method for a power plant steam generator water supply system of claim 1, wherein the feed forward matrix is
Wherein,
is the inverse of the first transfer function matrix, and W(s) is the second transfer function matrix.
7. A system using the decoupled control method for a power plant steam generator feed water system of any of claims 1 to 6, wherein the system comprises a first controller, a second controller, a decoupled control module; the first controller and the second controller are respectively in communication connection with the decoupling control module, and the decoupling control module is in control connection with the steam generator water supply system; wherein,
the first controller is used for receiving a preset reference pressure difference signal between the water collecting pipe and the steam collecting pipe after decoupling, and outputting an equivalent water feeding pump rotating speed signal;
the second controller is used for receiving a preset decoupled feed water reference flow signal and outputting an equivalent feed water valve opening signal;
the decoupling control module is used for receiving the equivalent feed pump rotating speed signal and the equivalent feed valve opening signal to establish a feed-forward matrix, and outputting a differential pressure signal between the decoupled water header and the steam header and a decoupled feed water flow signal based on the feed-forward matrix, so that decoupling control is performed on the feed water system.
8. The system of the decoupled control method for a power plant steam generator feedwater system of claim 7, wherein the decoupled control module comprises a feed forward compensator and a feedwater controller to be decoupled; wherein,
the feedforward compensator is used for receiving the equivalent water feeding pump rotating speed signal and the equivalent water feeding valve opening signal to establish a feedforward matrix;
the feed-water controller to be decoupled is based on the feed-forward matrix, so that the feed-water flow is only controlled by the opening of the equivalent feed-water valve, and the pressure difference between the feed-water collecting pipe and the steam collecting pipe is only controlled by the rotating speed of the equivalent feed-water pump, thereby realizing the decoupling of the feed-water system.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the method according to any of claims 1-6 when executing the computer program.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the method according to any one of claims 1-6.
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| CN202011284277.3A CN112432155B (en) | 2020-11-17 | 2020-11-17 | Decoupling control method and system for power plant steam generator water supply system |
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| CN114694866A (en) * | 2022-03-31 | 2022-07-01 | 西安交通大学 | Decoupling control method, system, equipment and storage medium after pressurized water reactor heat supply reconstruction |
| CN114791101A (en) * | 2022-03-09 | 2022-07-26 | 中国船舶重工集团公司第七一九研究所 | Hybrid steam generator system of power plant nuclear power device |
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