Reactor power control system for multi-element utilization of nuclear energy of nuclear power plant
By designing a reactor power control system for the diversified utilization of nuclear energy in nuclear power plants, and employing reactor controllers, turbine controllers, and user controllers, the system achieves energy balance and diversified utilization between reactor power and thermal energy users in nuclear power plants. This solves the control problem of diversified utilization in nuclear power plant control technology and is applicable to extended applications in multiple fields.
Patent Information
- Application Number
- CN202510809435.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-17
- Publication Date
- 2025-10-21
AI Technical Summary
Existing nuclear power plant control technology lacks control methods for the diversified utilization of nuclear energy, making it difficult to achieve energy balance between reactor power and thermal energy users, coordinated coordination among thermal energy users, the response and adjustment of the control system to the needs of multiple external users, the impact of new thermal energy users on the existing control system and scalability.
A reactor power control system for the diversified utilization of nuclear energy in a nuclear power plant was designed, including a primary loop and a secondary loop. Through the reactor controller, turbine controller, and user controller, the reactor power, main steam header pressure, and user load equipment parameters are adjusted in closed loop under reactor control mode and turbine generator control mode, respectively, to achieve energy balance and flexible control.
It achieves energy balance between nuclear power plant reactor power and thermal energy users, supports joint control of multiple thermal energy users, is suitable for diversified utilization of nuclear energy, and can be extended to areas such as district heating, seawater desalination, oil refining, shale oil processing, coal gasification and nuclear hydrogen production. It is also conveniently compatible with existing control systems and is suitable for the retrofitting of nuclear power plants at home and abroad.
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Figure CN120824045A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of nuclear power, and in particular relates to a reactor power control system for multiple utilization of nuclear energy in a nuclear power plant. Background Art
[0003] Faced with the strong demand for heat sources in urban heating networks, nuclear energy has the advantages of low resource consumption, small environmental impact and strong supply capacity. It is a safe, reliable, clean and economical energy and should be more widely used.
[0004] The mainstream form of nuclear energy utilization in China is steam turbine generator sets. There is insufficient exploration and engineering practice in the diversified utilization of nuclear energy such as cogeneration of heat and power and cogeneration of steam and power, which is insufficient to meet the demand for clean nuclear energy in many fields such as regional heating, seawater desalination, oil refining, shale oil processing, coal gasification and nuclear hydrogen production.
[0005] Compared to steam turbine generators, nuclear energy diversification, such as combined heat and power (CHP) and steam-power (CSPG), introduces new thermal energy users, necessitating a host of new control challenges. These include the coordination and stability of the overall control scheme, the energy balance between reactor power and multiple thermal users, the coordinated coordination between thermal users, the control system's response and adjustment to the demands of multiple external users, the impact of new thermal users on the existing control system, and the control system's scalability to accommodate flexible additions. Research on control methods for diversification of nuclear energy utilization is lacking in the field of nuclear power plant control technology. Summary of the Invention
[0006] In order to overcome the problems existing in the related art, a reactor power control system for multiple utilization of nuclear energy in a nuclear power plant is provided, the system comprising: a primary circuit and a secondary circuit;
[0007] The primary circuit includes the reactor, one or more main pumps, one or more evaporators, and a pressurizer interconnected by pipelines. The primary circuit is used to extract heat from the reactor core. The secondary circuit includes the secondary side of the evaporator, the main steam header, grid load equipment, and multiple user load equipment. The secondary circuit is used to convert thermal energy into energy forms required by external users.
[0008] The reactor controller is arranged in the primary circuit and is used to control the control rods of the nuclear reactor; the steam turbine controller is arranged in the secondary circuit power grid load equipment and is used to control the main steam valve of the power grid load equipment;
[0009] A user controller is arranged in each user load device to control the regulating valve of the user load device by controlling the opening of the regulating valve;
[0010] When the main steam header pressure is higher than the main steam header set pressure, the energy of the first and second circuits is balanced; the regulators that control the main steam header pressure are the reactor controller and the turbine controller, and each user controller adjusts the parameters of the user's load equipment through closed-loop control.
[0011] In one possible implementation, the purpose of the user load equipment includes heating or industrial steam supply, which is used to meet any one or more of regional heating, seawater desalination, oil refining, shale oil processing, coal gasification and nuclear energy hydrogen production.
[0012] In a possible implementation, the number of user load devices is adjusted as needed.
[0013] In a possible implementation, the total amount of steam consumed by each user load device does not exceed 20% of the total steam amount.
[0014] In one possible implementation, the reactor power control modes provided by the system of the present disclosure include: a reactor control mode and a steam turbine generator control mode;
[0015] When the system is in reactor control mode, the reactor controller controls the position of the nuclear reactor control rods according to the deviation between the reactor power and the reactor set power, and adjusts the reactor power in a closed loop. The steam turbine controller controls the opening of the main steam valve according to the deviation between the main steam header pressure and the main steam header set pressure, and adjusts the main steam header pressure in a closed loop. Each user controller controls the opening of the regulating valve according to the deviation between the user parameters of the user load device where the user controller is located and the user set parameters, and adjusts the parameters of the user load device in a closed loop.
[0016] When the system is in the steam turbine generator control mode, the reactor controller controls the position of the nuclear reactor control rods according to the deviation between the main steam header pressure and the set main steam header pressure, and performs closed-loop regulation of the main steam header pressure. The steam turbine controller controls the main steam valve opening according to the electric power and the set electric power, and performs closed-loop regulation of the electric power. Each user controller controls the regulating valve opening according to the deviation between the user parameters set for the user load device where the user controller is located and the user-set parameters, and performs closed-loop regulation of the user parameters.
[0017] When the system is in the steam turbine generator control mode, the balance of the primary and secondary circuits is achieved by the reactor controller. In order to avoid the slow response effect caused by the long energy transfer chain between the primary and secondary circuits, when the secondary circuit load changes significantly, the reactor controller introduces the reactor power, electric power, and the extraction steam flow of each user load equipment to form feedforward control.
[0018] In a possible implementation, the system is in reactor control mode, and the reactor controller uses the difference between the reactor set power H0 and the reactor power H as the first control deviation ΔH. When ΔH is equal to the feedback signal ΔH of the lifting and inserting rods, the difference between the reactor set power H0 and the reactor power H is used as the first control deviation ΔH.f The absolute value of the difference is greater than the first limit constant C H When the command of raising or inserting rod is generated, the command of raising or inserting rod is generated to control the reactor control rod to perform the action of raising or inserting rod and adjust the reactor power. In one embodiment, when the command of raising or inserting rod is not generated, the reactor controller sets C H 1% of full power, ΔH f =0; after generating the rod lifting and inserting instructions, the reactor controller sets C H 0.5% of full power, ΔH f is 0.93;
[0019] The turbine controller uses the difference between the main steam header set pressure P0 and the main steam header pressure P as the second control deviation ΔP, and the difference between ΔP and the feedback signal ΔP of the main steam valve opening and closing is f The absolute value of the difference is greater than the second limit constant C P When the main steam valve opening and closing instructions are generated, the main steam valve is controlled to open or close and the main steam header pressure is adjusted. In one embodiment, the turbine controller sets C P 0.05MPa, ΔP f When the turbine controller generates the command to open or close the main steam valve, it sets C P 0.025MPa, ΔP f is non-zero;
[0020] Each user controller takes the difference between the user setting parameter T0 and the user parameter T of the user load device where the user controller is located as the third control deviation ΔT. When the absolute value of ΔT is greater than the third limit constant C T When the valve opening and closing instructions are generated for the user's load equipment to control the valve to perform opening and closing actions, T is controlled by adjusting the extraction steam flow; T is any one of the heating temperature, heating flow, steam supply temperature, steam supply pressure, and steam supply flow.
[0021] In one possible implementation, the system is in the turbine generator control mode, and the reactor controller uses the difference between P0 and P as ΔP. f The absolute value of the difference is greater than C P When the reactor controller does not generate the rod lifting and inserting instructions, the C P is 0.05MPa; when the lifting and inserting rod instructions are generated, C P 0.025MPa;
[0022] The system determines ΔP according to the lifting and inserting rod instructions and feedforward instructions f:When the feed command is 1, and the lifting and inserting rod commands are 1, ΔP f When the feedforward instruction is 1 and the lifting and inserting rod instructions are 0, ΔP f When the feed command is 0 and the rod lifting and inserting command is 1, ΔP f is 2.45; when the feed command is 0, the lifting and inserting rod commands are 0, ΔP f is 0;
[0023] The system uses the steam core correction model to determine the first core power H based on the sum of the extraction steam flow of each user's load equipment. S Based on the sum of the electric power of each user's load equipment, the second core power H is determined by the electric core correction model E Based on H S With H E The sum of the two circuits is calculated by using the feedwater correction model to generate the total converted nuclear power H R , reactor power H and H R The difference is the power deviation ΔH between the first and second loops. When ΔH is greater than 5% of the full power and ΔP is greater than 0.2MPa, the feedforward command is 1. When ΔH does not exceed 5% of the full power and ΔP does not exceed 0.2MPa, the feedforward command is 0.
[0024] The turbine controller sets the difference between the set electric power E0 and the electric power E as the fourth control deviation ΔE. When the absolute value of ΔE is greater than the fourth limit constant C E When the main steam valve is opened or closed, the main steam valve is opened or closed to adjust the electric power.
[0025] Each user controller takes the difference between the user setting parameter T0 and the user parameter T of the user load device where the user controller is located as the fifth control deviation ΔT. When the absolute value of ΔT is greater than the fifth limit constant C T When the valve is turned on or off, it generates a valve opening and closing instruction, and the valve performs the opening and closing action, and controls the user parameter T by adjusting the extraction steam flow; the user parameter T is any one of the heating temperature, heating flow, steam supply temperature, steam supply pressure, and steam supply flow.
[0026] The beneficial effects of the present disclosure are as follows: the reactor power control system for multiple utilization of nuclear energy in a nuclear power plant provided by the present disclosure realizes the energy balance between the reactor power of the nuclear power plant and the thermal energy users through the reactor control mode and the steam turbine generator control mode respectively, and flexibly solves the control requirements of external users; it can realize the joint control of multiple thermal energy users and realize the multiple utilization of nuclear energy; in addition, the system of the present disclosure can realize the expansion of the number of thermal energy users, and lay the foundation for the expansion application of nuclear energy cogeneration and steam power cogeneration in multiple fields such as regional heating, seawater desalination, oil refining, shale oil processing, coal gasification and nuclear hydrogen production; it can also easily achieve compatibility with existing control systems, and is generally applicable to the transformation and optimization of steam turbine generator sets in nuclear power plants at home and abroad. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic diagram of a reactor power control system for multiple utilization of nuclear energy in a nuclear power plant shown in an embodiment of the present disclosure.
[0028] Figure 2 It is a schematic diagram showing a system in a reactor control mode according to an embodiment of the present disclosure.
[0029] Figure 3 It is a control logic diagram of a system in a reactor control mode shown in an embodiment of the present disclosure.
[0030] Figure 4 Schematic diagram of a system in a steam turbine generator control mode shown in an embodiment of the present disclosure.
[0031] Figure 5 It is a control logic diagram of a system in a steam turbine generator control mode shown in an embodiment of the present disclosure. DETAILED DESCRIPTION
[0032] The present disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0033] Unless otherwise defined, the technical and scientific terms used in this disclosure have the same meanings as those generally understood by those skilled in the art to which this disclosure belongs; the terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit this disclosure; the term "including" and any variations thereof in this disclosure are intended to cover non-exclusive inclusions. Obviously, the embodiments described in this disclosure are only some of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without making any creative work are within the scope of protection of this disclosure.
[0034] References to "embodiments" in this disclosure mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.
[0035] Figure 1 FIG. 1 is a schematic diagram of a reactor power control system for multiple utilization of nuclear energy in a nuclear power plant according to an embodiment of the present disclosure. Figure 1As shown, the system includes a primary circuit and a secondary circuit; the primary circuit includes a reactor, one or more main pumps, one or more evaporators and a pressurizer interconnected by pipelines, and the primary circuit is used to realize heat extraction from the reactor core; the secondary circuit includes the secondary side of the evaporator, a main steam header, a grid load device, and multiple user load devices, and the secondary circuit is used to convert thermal energy into energy forms required by external users; in each evaporator, the heat of the primary circuit is heated to form the main steam of the secondary circuit, realizing energy transfer from the primary circuit to the secondary circuit; the main steam generated by each evaporator is gathered to the main steam header, and the steam is decomposed to the grid load for power generation, and decomposed to each user's equipment for heating or steam supply conversion, realizing the diversified utilization of nuclear energy.
[0036] The reactor controller is arranged in a primary circuit and is used to control the nuclear reactor control rods. The reactor power is reduced by adjusting the downward insertion of the nuclear reactor control rods, and the reactor power is increased by adjusting the upward pull of the nuclear reactor control rods.
[0037] The steam turbine controller is arranged in the secondary circuit grid load equipment and is used to control the main steam valve of the grid load equipment. By adjusting the opening of the main steam valve, the power of the steam turbine generator set can be reduced or increased.
[0038] A user controller is arranged in each user load device to control the regulating valve of the user load device, and the lowering and raising of the user load device are achieved by controlling the opening of the regulating valve.
[0039] In the system disclosed herein, the key regulating variable for achieving energy balance between the primary and secondary circuits is the main steam header pressure. When the main steam header pressure is equal to the main steam header set pressure, the energy of the primary and secondary circuits is balanced. The regulators that control the main steam header pressure are the reactor controller and the turbine controller. Each user controller adjusts the parameters of the user's load equipment through closed-loop control.
[0040] The uses of user load equipment include heating or industrial steam supply, etc., which can meet the application needs of multiple fields such as regional heating, seawater desalination, oil refining, shale oil processing, coal vaporization and nuclear hydrogen production.
[0041] The number of user load devices can be adjusted as needed. In one application example, the total amount of steam consumed by each user load device does not exceed 20% of the total steam amount.
[0042] The reactor power control modes provided by the system of the present disclosure include: a reactor control mode and a steam turbine generator control mode.
[0043] Figure 2 FIG. 1 is a schematic diagram showing a system in a reactor control mode according to an embodiment of the present disclosure. Figure 2As shown, in reactor control mode, the reactor controller controls the position of the nuclear reactor control rods based on the deviation between the reactor power and the set reactor power, achieving closed-loop regulation of reactor power. The steam turbine controller controls the opening of the main steam valve based on the deviation between the main steam header pressure and the set main steam header pressure, achieving closed-loop regulation of the main steam header pressure. Each user controller controls the opening of the regulating valve based on the deviation between the user parameters of the user load device to which the user controller belongs and the user-set parameters, achieving closed-loop regulation of the parameters of that user load device. In reactor control mode, the overall output of the unit is determined by the reactor controller and is dependent on the set reactor power. The steam turbine controller loses its primary frequency regulation capability, and the power output is linked to each user load device, thereby enabling combined power-steam and power-heat regulation.
[0044] As an example of this embodiment, Figure 3 As shown, the system is in the reactor control mode, the reactor controller takes the difference between the reactor set power H0 and the reactor power H as the first control deviation ΔH. When ΔH is equal to the feedback signal ΔH of the lifting and inserting rods, the first control deviation ΔH is generated. f The absolute value of the difference is greater than the first limit constant C H When the command of raising or inserting rod is generated, the command of raising or inserting rod is generated to control the reactor control rod to perform the action of raising or inserting rod and adjust the reactor power. In a possible implementation, when the command of raising or inserting rod is not generated, the reactor controller sets C H 1% of full power, ΔH f =0; after generating the rod lifting and inserting instructions, the reactor controller sets C H 0.5% of full power, ΔH f It is 0.93.
[0045] For example, the reactor controller can f The difference is greater than C H , and when ΔH is positive, a rod raising instruction is generated, and the reactor control rod performs a rod raising operation to increase the reactor power; the reactor controller is in the range of ΔH and ΔH f The difference is greater than C H , and when ΔH is negative, a rod insertion instruction is generated, and the reactor control rod performs the rod insertion operation to reduce the reactor power.
[0046] The turbine controller uses the difference between the main steam header set pressure P0 and the main steam header pressure P as the second control deviation ΔP, and the difference between ΔP and the feedback signal ΔP of the main steam valve opening and closing is f The absolute value of the difference is greater than the second limit constant C P When the main steam valve opening and closing instructions are generated, the main steam valve is controlled to open or close and the main steam header pressure is adjusted. In a possible implementation, when the steam turbine controller does not generate the main steam valve opening and closing instructions, it sets CP 0.05MPa, ΔP f When the turbine controller generates the command to open or close the main steam valve, it sets C P 0.025MPa, ΔP f Is non-zero.
[0047] For example, in ΔP and ΔP f The absolute value of the difference is greater than C P , and ΔP is positive, generate the main steam valve opening command to control the main steam valve to open and increase the main steam header pressure; f The absolute value of the difference is greater than C P , and when ΔP is negative, a main steam valve closing instruction is generated to control the main steam valve to close in order to reduce the main steam header pressure.
[0048] Each user controller takes the difference between the user setting parameter T0 and the user parameter T of the user load device where the user controller is located as the third control deviation ΔT. When the absolute value of ΔT is greater than the third limit constant C T When the user load device is activated, a valve opening / closing command is generated to control the valve opening / closing action. The extraction steam flow is then adjusted to control T. T is any one of the following: heating temperature, heating flow, steam supply temperature, steam supply pressure, or steam supply flow.
[0049] For example, the absolute value of ΔT of the user controller is greater than C T , and ΔT is positive, an instruction to open the regulating valve is generated to control the regulating valve to open in order to increase the exhaust flow of the user's load equipment; when the absolute value of ΔT is greater than C T , and when ΔT is negative, an instruction to close the regulating valve is generated to control the regulating valve to perform the closing action to reduce the exhaust flow of the user's load equipment.
[0050] Figure 4 FIG. 1 is a schematic diagram showing a system in a turbine generator control mode according to an embodiment of the present disclosure. Figure 4As shown, the system is in turbine generator control mode. The reactor controller controls the position of the nuclear reactor control rods based on the deviation between the main steam header pressure and the set main steam header pressure, implementing closed-loop regulation of the main steam header pressure. The turbine controller controls the main steam valve opening based on the electrical power and the set electrical power, implementing closed-loop regulation of the electrical power. Each user controller controls the regulating valve opening based on the deviation between the user parameters set for the user's load device and the user's set parameters, implementing closed-loop regulation of the user parameters. In turbine generator control mode, the overall unit output is determined by the turbine controller and each user controller, depending on the sum of the electrical power and the user's load devices. The turbine controller has the primary frequency regulation capability of the power grid, and the reactor power is linked with the electrical power and each user's load device, enabling reactor-generator, reactor-steam, and reactor-heat co-regulation.
[0051] When the system is in the steam turbine generator control mode, the balance of the primary and secondary circuits is achieved by the reactor controller. In order to avoid the slow response effect caused by the long energy transfer chain between the primary and secondary circuits, when the secondary circuit load changes significantly, the reactor controller introduces the reactor power, electric power, and the extraction steam flow of each user load equipment to form feedforward control.
[0052] As an example of this embodiment, Figure 5 As shown, the system is in the turbine generator control mode, and the reactor controller takes the difference between P0 and P as ΔP. f The absolute value of the difference is greater than C P When the reactor controller does not generate the rod lifting and inserting instructions, set C P is 0.05MPa; when the lifting and inserting rod instructions are generated, C P It is 0.025MPa.
[0053] The system determines ΔP according to the lifting and inserting rod instructions and feedforward instructions f :When the feed command is 1, and the lifting and inserting rod commands are 1, ΔP f When the feedforward instruction is 1 and the lifting and inserting rod instructions are 0, ΔP f When the feed command is 0 and the rod lifting and inserting command is 1, ΔP f is 2.45; when the feed command is 0, the lifting and inserting rod commands are 0, ΔP f is 0.
[0054] The system uses the steam core correction model to determine the first core power H based on the sum of the extraction steam flow of each user's load equipment. S Based on the sum of the electric power of each user's load equipment, the second core power H is determined by the electric core correction model E Based on H S With HE The sum of the two circuits is calculated by using the feedwater correction model to generate the total converted nuclear power H R , reactor power H and H R The difference is the primary and secondary core power deviation ΔH. When ΔH is greater than 5% of full power and ΔP is greater than 0.2 MPa, the feedforward command is 1. When ΔH does not exceed 5% of full power and ΔP does not exceed 0.2 MPa, the feedforward command is 0. It should be noted that the steam core correction model, the power core correction model, and the feedwater correction model can be obtained, for example, based on curve fitting of the actual operating parameters of the unit. The present disclosure does not limit the specific form of the above models.
[0055] The turbine controller sets the difference between the set electric power E0 and the electric power E as the fourth control deviation ΔE. When the absolute value of ΔE is greater than the fourth limit constant C E When the main steam valve is turned on or off, the main steam valve opens and closes, and the electric power is adjusted.
[0056] Each user controller takes the difference between the user setting parameter T0 and the user parameter T of the user load device where the user controller is located as the fifth control deviation ΔT. When the absolute value of ΔT is greater than the fifth limit constant C T When the valve is turned on or off, it generates a valve opening / closing command, and the valve performs the opening / closing action, thereby adjusting the extraction steam flow to control the user parameter T. The user parameter T can be any one of the following: heating temperature, heating flow, steam supply temperature, steam supply pressure, or steam supply flow.
[0057] The reactor power control system for the nuclear power plant with multiple utilization of nuclear energy provided by the present disclosure realizes the energy balance between the nuclear power plant reactor power and the thermal energy users through the reactor control mode and the steam turbine generator control mode respectively, and flexibly solves the control needs of external users; it can realize the joint control of multiple thermal energy users and realize the multiple utilization of nuclear energy; in addition, the system disclosed by the present disclosure can realize the expansion of the number of thermal energy users, and lay the foundation for the expansion application of nuclear energy cogeneration and steam power cogeneration in multiple fields such as regional heating, seawater desalination, oil refining, shale oil processing, coal gasification and nuclear hydrogen production; it can also easily achieve compatibility with existing control systems, and is generally applicable to the transformation and optimization of steam turbine generator sets in nuclear power plants at home and abroad.
[0058] While various embodiments of the present disclosure have been described above, the above descriptions are illustrative, non-exhaustive, and not intended to be limiting of the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is selected to best explain the principles of the embodiments, their practical applications, or improvements to existing technologies, or to enable others skilled in the art to understand the embodiments disclosed herein.
Claims
1. A reactor power control system for multiple utilization of nuclear energy in a nuclear power plant, characterized in that: The system comprises: a primary circuit and a secondary circuit; The primary circuit includes the reactor, one or more main pumps, one or more evaporators, and a pressurizer interconnected by pipelines. The primary circuit is used to extract heat from the reactor core. The secondary circuit includes the secondary side of the evaporator, the main steam header, grid load equipment, and multiple user load equipment. The secondary circuit is used to convert thermal energy into energy forms required by external users. The reactor controller is arranged in the primary circuit and is used to control the control rods of the nuclear reactor; the steam turbine controller is arranged in the secondary circuit power grid load equipment and is used to control the main steam valve of the power grid load equipment; A user controller is arranged in each user load device to control the regulating valve of the user load device by controlling the opening of the regulating valve; When the main steam header pressure is higher than the main steam header set pressure, the energy of the first and second circuits is balanced; the regulators that control the main steam header pressure are the reactor controller and the turbine controller, and each user controller adjusts the parameters of the user's load equipment through closed-loop control.
2. The system according to claim 1, wherein: The purpose of the user load equipment includes heating or industrial steam supply, which is used to meet any one or more of district heating, seawater desalination, oil refining, shale oil processing, coal gasification and nuclear energy hydrogen production.
3. The system according to claim 1, wherein: The number of user load devices is adjusted as needed.
4. The system according to claim 3, characterized in that The total steam consumption of each user load equipment shall not exceed 20% of the total steam consumption.
5. The system according to claim 1, wherein: The reactor power control modes provided by the system of the present disclosure include: a reactor control mode and a steam turbine generator control mode; When the system is in reactor control mode, the reactor controller controls the position of the nuclear reactor control rods according to the deviation between the reactor power and the reactor set power, and adjusts the reactor power in a closed loop. The steam turbine controller controls the opening of the main steam valve according to the deviation between the main steam header pressure and the main steam header set pressure, and adjusts the main steam header pressure in a closed loop. Each user controller controls the opening of the regulating valve according to the deviation between the user parameters of the user load device where the user controller is located and the user set parameters, and adjusts the parameters of the user load device in a closed loop. When the system is in the steam turbine generator control mode, the reactor controller controls the position of the nuclear reactor control rods according to the deviation between the main steam header pressure and the set main steam header pressure, and performs closed-loop regulation of the main steam header pressure. The steam turbine controller controls the main steam valve opening according to the electric power and the set electric power, and performs closed-loop regulation of the electric power. Each user controller controls the regulating valve opening according to the deviation between the user parameters set for the user load device where the user controller is located and the user-set parameters, and performs closed-loop regulation of the user parameters. When the system is in the steam turbine generator control mode, the balance of the primary and secondary circuits is achieved by the reactor controller. In order to avoid the slow response effect caused by the long energy transfer chain between the primary and secondary circuits, when the secondary circuit load changes significantly, the reactor controller introduces the reactor power, electric power, and the extraction steam flow of each user load equipment to form feedforward control.
6. The system according to claim 5, characterized in that The system is in the reactor control mode. The reactor controller uses the difference between the reactor set power H0 and the reactor power H as the first control deviation ΔH. When ΔH is equal to the feedback signal ΔH of the lifting and inserting rods, the first control deviation ΔH is generated. f The absolute value of the difference is greater than the first limit constant C H When the command of raising or inserting rod is generated, the command of raising or inserting rod is generated to control the reactor control rod to perform the action of raising or inserting rod and adjust the reactor power. In one embodiment, when the command of raising or inserting rod is not generated, the reactor controller sets C H 1% of full power, ΔH f =0; after generating the rod lifting and inserting instructions, the reactor controller sets C H 0.5% of full power, ΔH f is 0.93; The turbine controller uses the difference between the main steam header set pressure P0 and the main steam header pressure P as the second control deviation ΔP, and the difference between ΔP and the feedback signal ΔP of the main steam valve opening and closing is f The absolute value of the difference is greater than the second limit constant C P When the main steam valve opening and closing instructions are generated, the main steam valve is controlled to open or close and the main steam header pressure is adjusted. In one embodiment, the turbine controller sets C P 0.05MPa, ΔP f When the turbine controller generates the command to open or close the main steam valve, it sets C P 0.025MPa, ΔP f is non-zero; Each user controller takes the difference between the user setting parameter T0 and the user parameter T of the user load device where the user controller is located as the third control deviation ΔT. When the absolute value of ΔT is greater than the third limit constant C T When the valve opening and closing instructions are generated for the user's load equipment to control the valve to perform opening and closing actions, T is controlled by adjusting the extraction steam flow; T is any one of the heating temperature, heating flow, steam supply temperature, steam supply pressure, and steam supply flow.
7. The system according to claim 5, characterized in that The system is in the turbine generator control mode, and the reactor controller takes the difference between P0 and P as ΔP. f The absolute value of the difference is greater than C P When the reactor controller does not generate the rod lifting and inserting instructions, the C P is 0.05MPa; when the lifting and inserting rod instructions are generated, C P 0.025MPa; The system determines ΔP according to the lifting and inserting rod instructions and feedforward instructions f :When the feed command is 1, and the lifting and inserting rod commands are 1, ΔP f When the feedforward instruction is 1 and the lifting and inserting rod instructions are 0, ΔP f When the feed command is 0 and the rod lifting and inserting command is 1, ΔP f is 2.45; when the feed command is 0, the lifting and inserting rod commands are 0, ΔP f is 0; The system uses the steam core correction model to determine the first core power H based on the sum of the extraction steam flow of each user's load equipment. S ; Based on the sum of the electric power of each user's load equipment, the second core power H is determined by the electric core correction model. E Based on H S With H E The sum of the two circuits is calculated by using the feedwater correction model to generate the total converted nuclear power H R , reactor power H and H R The difference is the power deviation ΔH between the first and second loops. When ΔH is greater than 5% of the full power and ΔP is greater than 0.2MPa, the feedforward command is 1. When ΔH does not exceed 5% of the full power and ΔP does not exceed 0.2MPa, the feedforward command is 0. The turbine controller sets the difference between the set electric power E0 and the electric power E as the fourth control deviation ΔE. When the absolute value of ΔE is greater than the fourth limit constant C E When the main steam valve is opened or closed, the main steam valve is opened or closed to adjust the electric power. Each user controller takes the difference between the user setting parameter T0 and the user parameter T of the user load device where the user controller is located as the fifth control deviation ΔT. When the absolute value of ΔT is greater than the fifth limit constant C T When the valve opening and closing instructions are generated, the valve opens and closes, and the user parameter T is controlled by adjusting the extraction steam flow; The user parameter T is any one of heating temperature, heating flow, steam supply temperature, steam supply pressure, and steam supply flow.