Method and device for coordinated control of a nuclear power plant reactor

Abstract

The application provides a nuclear power plant reactor-turbine coordinated control method and device, and relates to the field of nuclear energy heating. After receiving a request for increasing power generation load and putting into operation for heating, the turbine is controlled to adopt an ALR control mode, the power generation load of a power generation system is set to a first target load value based on the request, and the ECV opening degree is maintained unchanged. If the power generation load increases to the first target load value and the reactor load increases to the first target load value along with the increase of the power generation load, the turbine is controlled to switch from the ALR control mode to an LL control mode for putting into operation for heating, and the turbine is still in the LL control mode after the operation for heating is completed. If the heating system is stably operated, the turbine is controlled to be maintained in the LL mode, and the GV opening degree and the reactor power are kept unchanged during the stable operation of the heating system. The application solves the system oscillation problem caused by the coupled changes among the nuclear power heating unit reactor thermal power, the power generation load and the heating load, and improves the safety and stability of the unit operation.

Description

Technical Field

[0001] This application relates to the field of nuclear heating, and in particular to a method and apparatus for coordinated control of nuclear power plant reactors. Background Technology

[0002] Cities now widely use centralized heating systems, but heating energy still relies primarily on fossil fuels, making it difficult to avoid the environmental impact of carbon oxide emissions. Nuclear energy, as a clean, efficient, and stable energy source, can provide users with a continuous supply of heat, and nuclear heating is gradually becoming another form of nuclear energy supply.

[0003] For nuclear power units operating under pure condensation conditions, the power generation load is the same as the total load of the conventional island. The unit operates in reactor-following control mode, and there is a one-to-one correspondence between reactor thermal power and power generation load. However, in the modified heating operation mode, the coordination and matching between reactor thermal power, power generation load, and heating load becomes more complex due to the added heating load. Different coordination methods among these three elements will have varying impacts on the safe and stable operation of the unit, the degree to which heating load and power generation meet grid requirements, and the economic benefits of the nuclear power plant. Traditional nuclear power units in pure condensation conditions use Automatic Load Regulation (ALR) control mode. For heating operation, considering the increase in thermal load under rated reactor power, there is a risk of reactor over-power. If electrical and thermal loads are adjusted simultaneously, it is necessary to use ECV to adjust the thermal load and GV to adjust both electrical and thermal loads simultaneously. The reactor power also adjusts accordingly, which can easily cause multi-parameter oscillations. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, one objective of this application is to propose a reactor (electric and thermal) coordinated control method for a nuclear power plant that simultaneously provides electrical and thermal loads. The method includes: upon receiving a request to increase the power generation load and initiate thermal operation, controlling the turbine to adopt an Automatic Load Regulation (ALR) control mode, and setting the power generation load of the power generation system to a first target load value based on the request, while maintaining the opening of the thermal hydraulic regulating valve (ECV) unchanged; in response to the power generation load increasing to the first target load value, and the reactor load increasing to the first target load value along with the power generation load, controlling the turbine to switch from ALR control mode to LL mode for thermal operation; after the thermal operation is completed, controlling the turbine to remain in Load Limiter Control Mode (LL); in response to the stable operation of the thermal system, controlling the turbine to remain in LL mode, wherein during the stable operation of the thermal system, the opening of the main steam regulating valve (GV) and the reactor power remain unchanged.

[0006] The second objective of this application is to propose a nuclear power plant reactor coordination control device.

[0007] The third objective of this application is to propose an electronic device.

[0008] The fourth objective of this application is to provide a non-transitory computer-readable storage medium.

[0009] The fifth objective of this application is to provide a computer program product.

[0010] To achieve the above objectives, the first aspect of this application proposes a nuclear power plant reactor-turbine coordinated control method, comprising: upon receiving a request to increase the power generation load and commence heating operation, controlling the steam turbine to adopt the automatic load regulator (ALR) control mode, and setting the power generation load of the power generation system to a first target load value based on the request, while maintaining the opening of the heating hydraulic regulating valve (ECV) unchanged; in response to the power generation load increasing to the first target load value, and the reactor load increasing to the first target load value along with the power generation load, controlling the steam turbine to switch from the ALR control mode to the load limiter (LL) control mode for heating operation, and after the heating operation is completed, controlling the steam turbine to remain in the load limiter control (LL) mode; in response to the stable operation of the heating system, controlling the steam turbine to remain in the LL mode, wherein during the stable operation of the heating system, the opening of the main steam regulating valve (GV) and the reactor power remain unchanged.

[0011] According to one embodiment of this application, after controlling the steam turbine to remain in LL mode in response to the stable operation of the heating system, the method further includes: during the stable operation of the heating system, in response to receiving a first adjustment request for the heating load, maintaining the GV opening and reactor power unchanged, and adjusting the heating load according to the first adjustment request.

[0012] According to one embodiment of this application, adjusting the heating load according to a first adjustment request includes: obtaining a stable heating load value of the heating system during stable operation of the heating system; obtaining a target heating load value carried by the first adjustment request; in response to the target heating load value being greater than the stable heating load value, increasing the ECV opening to increase the heating load until the real-time heating load value of the heating system reaches the target heating load value, during which the GV opening and reactor power remain unchanged; in response to the target heating load value being less than the stable heating load value, decreasing the ECV opening to decrease the heating load until the real-time heating load value of the heating system reaches the target heating load value, during which the GV opening and reactor power remain unchanged.

[0013] According to one embodiment of this application, in response to the stable operation of the heating system, after controlling the steam turbine to remain in LL mode, the method further includes: during the stable operation of the heating system, in response to receiving a second adjustment request for the power generation load, controlling the steam turbine to switch from LL mode to ALR control mode; maintaining the ECV opening unchanged, and based on the second adjustment request, setting the power generation load of the power generation system to a second target load value, so as to adjust the power generation load to the second target load value.

[0014] According to one embodiment of this application, the nuclear power plant reactor coordination control method further includes: obtaining the stable heating load value of the heating system during stable operation of the heating system; obtaining the final heating load value of the heating system after adjusting the power generation load to a second target load value; adjusting the ECV opening degree according to the stable heating load value and the final heating load value so that the final heating load value recovers to the stable heating load value; and controlling the turbine to switch from ALR control mode to LL mode after the final heating load value recovers to the stable heating load value.

[0015] According to one embodiment of this application, during the process of increasing the power generation load to a first target load value or adjusting the power generation load to a second target load value, the GV opening degree is positively correlated with the power generation power, the first stage inlet pressure of the steam turbine is positively correlated with the GV opening degree, and the reactor power is positively correlated with the first stage inlet pressure of the steam turbine.

[0016] To achieve the above objectives, a second aspect of this application provides a nuclear power plant reactor-turbine coordination control device, comprising: a first control module, configured to, upon receiving a request to increase the power generation load and commence heating operation, control the turbine to adopt the Automatic Load Regulator (ALR) control mode, and based on the request, set the power generation load of the power generation system to a first target load value, while maintaining the opening of the heating hydraulic regulating valve (ECV) unchanged; a second control module, configured to, in response to the power generation load increasing to the first target load value, and the reactor load increasing to the first target load value along with the power generation load, control the turbine to switch from the ALR control mode to the LL mode for heating operation, and after the heating operation is completed, control the turbine to remain in the load limiter control LL mode; and a third control module, configured to, in response to the stable operation of the heating system, control the turbine to remain in the LL mode, wherein, during the stable operation of the heating system, the opening of the main steam regulating valve (GV) and the reactor power remain unchanged.

[0017] According to one embodiment of this application, the nuclear power plant reactor coordination control device further includes: a fourth control module, configured to, during stable operation of the heating system, in response to receiving a first adjustment request for the heating load, maintain the GV opening and reactor power unchanged, and adjust the heating load according to the first adjustment request.

[0018] According to one embodiment of this application, the fourth control module is further configured to: acquire the stable heating load value of the heating system during stable operation of the heating system; acquire the target heating load value carried by the first adjustment request; in response to the target heating load value being greater than the stable heating load value, increase the ECV opening to increase the heating load until the real-time heating load value of the heating system reaches the target heating load value, during which time the GV opening and reactor power remain unchanged; in response to the target heating load value being less than the stable heating load value, decrease the ECV opening to decrease the heating load until the real-time heating load value of the heating system reaches the target heating load value, during which time the GV opening and reactor power remain unchanged.

[0019] According to one embodiment of this application, the nuclear power plant reactor coordination control device further includes: a fifth control module, configured to: during the stable operation of the heating system, in response to receiving a second adjustment request for the power generation load, control the steam turbine to switch from LL mode to ALR control mode and maintain the ECV opening unchanged, and based on the second adjustment request, set the power generation load of the power generation system to a second target load value, so as to adjust the power generation load to the second target load value.

[0020] According to one embodiment of this application, the fifth control module is further configured to: obtain the stable heating load value of the heating system during stable operation of the heating system; obtain the final heating load value of the heating system after adjusting the power generation load to the second target load value; adjust the ECV opening degree according to the stable heating load value and the final heating load value so that the final heating load value is restored to the stable heating load value; and after the final heating load value is restored to the stable heating load value, control the turbine to switch from ALR control mode to LL mode.

[0021] According to one embodiment of this application, during the process of increasing the power generation load to a first target load value or adjusting the power generation load to a second target load value, the GV opening degree is positively correlated with the power generation power, the first stage inlet pressure of the steam turbine is positively correlated with the GV opening degree, and the reactor power is positively correlated with the first stage inlet pressure of the steam turbine.

[0022] To achieve the above objectives, a third aspect of this application provides an electronic device comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to implement the nuclear power plant reactor coordination control method as described in the first aspect of this application.

[0023] To achieve the above objectives, a fourth aspect of this application provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to implement the nuclear power plant reactor coordination control method as described in the first aspect of this application.

[0024] To achieve the above objectives, a fifth aspect of this application provides a computer program product, including a computer program that, when executed by a processor, implements the nuclear power plant reactor coordination control method as described in the first aspect of this application.

[0025] This application achieves at least the following beneficial effects:

[0026] This application addresses the system oscillation problem caused by the coupled changes in reactor thermal power, power generation load, and heating load during external heating operations of nuclear power plants. By adopting a coordinated operation control strategy for reactor, generator, and heating, the coordination and matching problem among reactor thermal power, power generation load, and heating load can be simplified, improving the safety and stability of unit operation, enhancing the satisfaction of heating load and power generation with the external grid, and increasing the economic benefits of the nuclear power plant. With the development of large-scale nuclear heating, the nuclear power plant reactor-generator coordinated control method proposed in this application can guide subsequent engineering design and production operation, and has broad application prospects. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram illustrating an exemplary implementation of a nuclear power plant reactor coordination control method according to one embodiment of this application.

[0029] Figure 2 This is a schematic diagram illustrating parameter changes in a unit that first increases its power generation load and then puts it into operation for heating, according to one embodiment of this application.

[0030] Figure 3 This is a schematic diagram illustrating an exemplary implementation of a nuclear power plant reactor coordination control method according to one embodiment of this application.

[0031] Figure 4 This is a schematic diagram illustrating an exemplary implementation of a nuclear power plant reactor coordination control method according to one embodiment of this application.

[0032] Figure 5 This is a schematic diagram of a nuclear power plant reactor coordination control device according to one embodiment of this application.

[0033] Figure 6 This is a schematic diagram of an electronic device according to one embodiment of this application. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0035] Figure 1 This is a schematic diagram of an exemplary embodiment of a nuclear power plant reactor coordination control method shown in this application, as follows: Figure 1 As shown, the reactor coordination control method for this nuclear power plant includes the following steps:

[0036] S101, after receiving a request to increase the power generation load and put into operation for heating, controls the steam turbine to adopt the automatic load regulator (ALR) control mode, and sets the power generation load of the power generation system to the first target load value based on the request, while maintaining the opening of the heating hydraulic regulating valve (ECV) unchanged.

[0037] If the nuclear power plant reactor unit is not yet in operation for heating, this application proposes that the unit first increase its power output and then put the heating system into operation. After the nuclear power plant reactor unit receives a request to increase the power generation load and put the heating system into operation, the turbine is controlled to adopt the Automatic Load Regulation (ALR) control mode, and the power generation load of the power generation system is set to the first target load value based on the request, while maintaining the opening of the heating hydraulic control valve (ECV) unchanged.

[0038] Among them, during the process of increasing the power generation load to the first target load value, the GV opening degree is positively correlated with the power generation, the first stage inlet pressure of the steam turbine is positively correlated with the GV opening degree, and the reactor power is positively correlated with the first stage inlet pressure of the steam turbine.

[0039] S102, in response to the increase of the power generation load to the first target load value, and the reactor load also increases to the first target load value with the increase of the power generation load, the control turbine is switched from ALR control mode to load limiter LL mode for commissioning and heating. After commissioning and heating is completed, the control turbine is still in LL control mode.

[0040] For example, if the target load value for reactor power is estimated to be 100% based on the required power generation target load and heating load, and the ALR load value is set to 98%, the GV opening automatically increases with the increase of the power generation target value. The reactor power automatically increases with the first-stage inlet pressure, the high-pressure cylinder power increases, the low-pressure cylinder power increases, and the power generation increases until the load value of 98% is achieved, at which point the reactor power stabilizes at 98%. ALR is then disengaged, and the GV opening is manually increased. In Load Limiter Control Mode (LL), the electrical power is increased until both the reactor power and electrical power reach the first target load value of 100%, completing the power increase. When the heating load is put into operation, the heating extraction steam regulating valve is manually opened. After the high-pressure exhaust pressure drops below the pressure setting range, the extraction steam regulating valve stops opening further. The reheat regulating valve opening automatically closes from fully open to follow the high-pressure exhaust pressure, the low-pressure cylinder steam intake gradually decreases, and the power generation gradually decreases to 88%. The turbine is then switched to LL mode, the GV opening remains unchanged, and the reactor power remains stable at 100%.

[0041] Taking the above example, Table 1 shows a schematic diagram of the parameter changes when the power output of the unit is increased before the heating load is put into operation. As shown in Table 1, both the power grid and the heating network simultaneously place demands on the nuclear power unit, requiring an increase in power output and the activation of heating load. The change process of each parameter is as follows:

[0042] Initial state: reactor power 70%, electrical power 70%, steam extraction rate for heating 0t / h;

[0043] Final state: Reactor power 100%, electrical power 88%, heating steam extraction rate 850t / h.

[0044] Table 1. Schematic diagram of parameter changes when the unit first increases power rate and then starts supplying heat.

[0045]

[0046] Taking the above example as an example, Figure 2 This application illustrates a parameter change diagram of a generating unit that first increases its power generation load and then begins operation for heat supply, as shown in the diagram. Figure 2 As shown, line 1 represents the amount of heating steam (t / h), line 2 represents the power generation (%), line 3 represents the reactor power (%), line 4 represents the high-pressure cylinder power (%), and line 5 represents the low-pressure cylinder power (%). Initially, lines 3, 4, and 5, corresponding to the reactor power, high-pressure cylinder power, and low-pressure cylinder power, overlap. Figure 2 The section before the solid black line (as shown in diagrams 3, 4, and 5) indicates that after the reactor power, high-pressure cylinder power, and low-pressure cylinder power reach 100%, the reactor power and high-pressure cylinder power remain at 100%. Figure 2 The line segment shows a short horizontal line followed by a long horizontal line, then a short horizontal line followed by a long horizontal line, and finally a line segment indicating the portion of the line. The low-pressure cylinder power gradually decreases and then remains stable. Figure 2 (The latter half of the upper black solid line).

[0047] S103, in response to the stable operation of the heating system, controls the steam turbine to remain in LL mode, wherein during the stable operation of the heating system, the opening of the main steam regulating valve GV and the reactor power remain unchanged.

[0048] After the heating system is put into operation, during the period of stable operation of the heating system, the steam turbine is controlled to remain in LL mode. During the period of stable operation of the heating system, the opening of the main steam regulating valve (Governing Valve, GV) and the reactor power are kept constant.

[0049] This application proposes a nuclear power plant reactor-turbine coordinated control method, comprising: upon receiving a request to increase power generation load and commence heating operation, controlling the steam turbine to adopt Automatic Load Conditioner (ALR) control mode, and setting the power generation load of the power generation system to a first target load value based on the request, while maintaining the opening of the heating hydraulic regulating valve ECV unchanged; in response to the power generation load increasing to the first target load value, and the reactor load increasing to the first target load value accordingly, controlling the steam turbine to switch from ALR control mode to LL mode for heating operation; after the heating operation is completed, controlling the steam turbine to remain in LL mode; in response to the stable operation of the heating system, controlling the steam turbine to remain in LL mode, wherein during the stable operation of the heating system, the opening of the main steam regulating valve GV and the reactor power remain unchanged. This application solves the system oscillation problem caused by the coupling changes among reactor thermal power, power generation load, and heating load when the heat load changes during the external heating period of a nuclear power plant heating unit. The coordinated operation and control strategy of reactor, generator, and heating can simplify the coordination and matching problem among reactor thermal power, power generation load, and heating load, improve the safety and stability of unit operation, enhance the satisfaction of heating load and power generation with the external grid, and improve the economic benefits of nuclear power plants. With the development of large-scale nuclear heating, the nuclear power plant reactor-generator coordinated control method proposed in this application can guide subsequent engineering design and production operation, and has broad application prospects.

[0050] Figure 3 This is a schematic diagram of an exemplary embodiment of a nuclear power plant reactor coordination control method shown in this application, as follows: Figure 3 As shown, the reactor coordination control method for this nuclear power plant includes the following steps:

[0051] S301, after receiving a request to increase the power generation load and put into operation for heating, controls the steam turbine to adopt the automatic load regulator (ALR) control mode, and sets the power generation load of the power generation system to the first target load value based on the request, while maintaining the opening of the heating hydraulic regulating valve (ECV) unchanged.

[0052] S302, in response to the increase of the power generation load to the first target load value, and the reactor load also increases to the first target load value with the increase of the power generation load, the control turbine is switched from ALR control mode to load limiter LL control mode for commissioning and heating. After commissioning and heating is completed, the control turbine is still in LL mode.

[0053] S303, in response to the stable operation of the heating system, controls the steam turbine to remain in LL mode, wherein during the stable operation of the heating system, the opening of the main steam regulating valve GV and the reactor power remain unchanged.

[0054] For details on the specific implementation of steps S301 to S303, please refer to the relevant parts of the above embodiments, which will not be repeated here.

[0055] S304, during the stable operation of the heating system, in response to receiving a first adjustment request for the heating load, maintains the GV opening and reactor power unchanged, and adjusts the heating load according to the first adjustment request.

[0056] During stable operation of the heating system, if the unit receives a first adjustment request for the heating load, it maintains the GV opening and reactor power unchanged, and adjusts the heating load according to the first adjustment request. The first adjustment request refers to a request for adjusting the heating load during stable operation of the heating system.

[0057] When adjusting the heating load according to the first adjustment request, the load value of the heating system during the stable operation of the heating system is obtained as the stable heating load value, and the target heating load value carried by the first adjustment request is obtained. If the target heating load value is greater than the stable heating load value, the ECV opening is increased to increase the heating load until the real-time heating load value of the heating system reaches the target heating load value. During this period, the GV opening and reactor power remain unchanged. If the target heating load value is less than the stable heating load value, the ECV opening is decreased to decrease the heating load until the real-time heating load value of the heating system reaches the target heating load value. During this period, the GV opening and reactor power remain unchanged.

[0058] This application addresses the system oscillation problem caused by the coupled changes in reactor thermal power, power generation load, and heating load during external heating operations of nuclear power plants. By adopting a coordinated operation control strategy for reactor, generator, and heating, the coordination and matching problem among reactor thermal power, power generation load, and heating load can be simplified, improving the safety and stability of unit operation, enhancing the satisfaction of heating load and power generation with the external grid, and increasing the economic benefits of the nuclear power plant. With the development of large-scale nuclear heating, the nuclear power plant reactor-generator coordinated control method proposed in this application can guide subsequent engineering design and production operation, and has broad application prospects.

[0059] Figure 4 This is a schematic diagram of an exemplary embodiment of a nuclear power plant reactor coordination control method shown in this application, as follows: Figure 4 As shown, the reactor coordination control method for this nuclear power plant includes the following steps:

[0060] S401, after receiving a request to increase the power generation load and put into operation for heating, controls the steam turbine to adopt the automatic load regulator (ALR) control mode, and sets the power generation load of the power generation system to the first target load value based on the request, while maintaining the opening of the heating hydraulic regulating valve (ECV) unchanged.

[0061] S402, in response to the increase of the power generation load to the first target load value, and the reactor load also increases to the first target load value with the increase of the power generation load, the heating is put into operation. After the heating is put into operation, the turbine is controlled to switch from ALR control mode to load limiter control LL mode.

[0062] S403, in response to the stable operation of the heating system, controls the steam turbine to remain in LL mode, wherein during the stable operation of the heating system, the opening of the main steam regulating valve GV and the reactor power remain unchanged.

[0063] For details on the specific implementation of steps S401 to S403, please refer to the relevant parts of the above embodiments, which will not be repeated here.

[0064] S404, during the stable operation of the heating system, in response to receiving a second adjustment request for the power generation load, controls the steam turbine to switch from LL mode to ALR control mode.

[0065] During stable operation of the heating system, if a second adjustment request for the power generation load is received, the turbine is switched from LL mode to Automatic Load Regulator (ALR) control mode. The second adjustment request refers to a request to adjust the power generation load during stable operation of the heating system.

[0066] S405, maintain the ECV opening unchanged, and based on the second adjustment request, set the power generation load of the power generation system to the second target load value, so as to adjust the power generation load to the second target load value.

[0067] During stable operation of the heating system, upon receiving a second adjustment request for the power generation load, the turbine is switched from LL mode to Automatic Load Conditioner (ALR) control mode, maintaining the ECV opening constant. Based on the second adjustment request, the power generation load of the power generation system is set to the second target load value to achieve the adjustment of the power generation load to the second target load value. During the process of adjusting the power generation load to the second target load value, the GV opening is positively correlated with the power generation, the first-stage inlet pressure of the turbine is positively correlated with the GV opening, and the reactor power is positively correlated with the first-stage inlet pressure of the turbine.

[0068] Furthermore, during the adjustment process based on the second adjustment request, the power generation load of the power generation system is set to the second target load value. During this adjustment, the high-pressure exhaust pressure is in sliding mode, the reheat regulating valve opening remains essentially unchanged, and the heating extraction steam is approximately the same as non-regulated extraction steam. Therefore, the heating load changes passively during the adjustment process. After the generator power adjustment process is completed, if it is necessary to restore the heating load (although the ECV and reheat regulating valve openings remain unchanged, the change in high-pressure exhaust pressure will cause the heating load to deviate from the pre-adjustment power generation load), and the reactor power is lower than the rated power, the ECV opening is manually adjusted in ALR mode to restore the heating load. The reheat regulating valve automatically controls the high-pressure exhaust pressure at the set value. The GV opening and ECV opening change trends are the same. After all power generation and heating load adjustments are completed, the turbine control mode is switched back from ALR control mode to LL mode.

[0069] Specifically, when manually adjusting the ECV opening to restore the heating load, the load value of the heating system during the stable operation of the heating system is obtained as the stable heating load value, and the final heating load value of the heating system after adjusting the power generation load to the second target load value is obtained; based on the stable heating load value and the final heating load value, the ECV opening is adjusted so that the final heating load value is restored to the stable heating load value, and after the final heating load value is restored to the stable heating load value, the turbine is controlled to switch from ALR control mode to LL mode.

[0070] This application addresses the system oscillation problem caused by the coupled changes in reactor thermal power, power generation load, and heating load during external heating operations of nuclear power plants. By adopting a coordinated operation control strategy for reactor, generator, and heating, the coordination and matching problem among reactor thermal power, power generation load, and heating load can be simplified, improving the safety and stability of unit operation, enhancing the satisfaction of heating load and power generation with the external grid, and increasing the economic benefits of the nuclear power plant. With the development of large-scale nuclear heating, the nuclear power plant reactor-generator coordinated control method proposed in this application can guide subsequent engineering design and production operation, and has broad application prospects.

[0071] Figure 5 This application shows a schematic diagram of a nuclear power plant reactor coordination control device, such as... Figure 5 As shown, the nuclear power plant reactor coordination control device 500 includes a first control module 501, a second control module 502, and a third control module 503, wherein:

[0072] The first control module 501 is used to control the steam turbine to adopt the automatic load regulator (ALR) control mode after receiving a request to increase the power generation load and put the heating into operation, and to set the power generation load of the power generation system to the first target load value based on the request, while maintaining the opening degree of the heating hydraulic regulating valve ECV unchanged.

[0073] The second control module 502 is used to control the steam turbine to switch from ALR control mode to LL mode for operation and heating in response to the increase of the power generation load to the first target load value and the increase of the reactor load to the first target load value. After the operation and heating are completed, the steam turbine is controlled to remain in LL control mode.

[0074] The third control module 503 is used to control the steam turbine to remain in LL mode in response to the stable operation of the heating system, wherein the main steam regulating valve GV opening and reactor power remain unchanged during the stable operation of the heating system.

[0075] This device solves the system oscillation problem caused by the coupled changes in reactor thermal power, power generation load, and heating load during external heating operations of nuclear power plants. By adopting a coordinated operation control strategy for reactor, generator, and heating, the coordination and matching problem among reactor thermal power, power generation load, and heating load is simplified, improving the safety and stability of unit operation, enhancing the satisfaction of heating load and power generation with the external grid, and increasing the economic benefits of the nuclear power plant. With the development of large-scale nuclear heating, the nuclear power plant reactor-generator coordinated control method proposed in this application can guide subsequent engineering design and production operation, and has broad application prospects.

[0076] According to one embodiment of this application, the nuclear power plant reactor coordination control device 500 further includes: a fourth control module 504, used to maintain the GV opening and reactor power unchanged in response to receiving a first adjustment request for the heating load during the stable operation of the heating system, and to adjust the heating load according to the first adjustment request.

[0077] According to one embodiment of this application, the fourth control module 504 is further configured to: acquire the stable heating load value of the heating system during stable operation of the heating system; acquire the target heating load value carried by the first adjustment request; in response to the target heating load value being greater than the stable heating load value, increase the ECV opening to increase the heating load until the real-time heating load value of the heating system reaches the target heating load value, during which time the GV opening and reactor power remain unchanged; in response to the target heating load value being less than the stable heating load value, decrease the ECV opening to decrease the heating load until the real-time heating load value of the heating system reaches the target heating load value, during which time the GV opening and reactor power remain unchanged.

[0078] According to one embodiment of this application, the nuclear power plant reactor coordination control device 500 further includes: a fifth control module 505, configured to: during the stable operation of the heating system, in response to receiving a second adjustment request for the power generation load, control the steam turbine to switch from LL mode to ALR control mode and maintain the ECV opening unchanged, and based on the second adjustment request, set the power generation load of the power generation system to a second target load value, so as to adjust the power generation load to the second target load value.

[0079] According to one embodiment of this application, the fifth control module 505 is further configured to: acquire the stable heating load value of the heating system during stable operation of the heating system; acquire the final heating load value of the heating system after adjusting the power generation load to the second target load value; adjust the ECV opening degree according to the stable heating load value and the final heating load value so that the final heating load value is restored to the stable heating load value; and control the turbine to switch from ALR control mode to LL mode after the final heating load value is restored to the stable heating load value.

[0080] According to one embodiment of this application, during the process of increasing the power generation load to a first target load value or adjusting the power generation load to a second target load value, the GV opening degree is positively correlated with the power generation power, the first stage inlet pressure of the steam turbine is positively correlated with the GV opening degree, and the reactor power is positively correlated with the first stage inlet pressure of the steam turbine.

[0081] To implement the above embodiments, this application also proposes an electronic device 600, such as... Figure 6 As shown, the electronic device 600 includes a processor 601 and a memory 602 communicatively connected to the processor. The memory 602 stores instructions that can be executed by at least one processor. The instructions are executed by at least one processor 601 to implement the nuclear power plant reactor coordination control method as shown in the above embodiment.

[0082] To implement the above embodiments, this application also proposes a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to enable a computer to implement the nuclear power plant reactor coordination control method as shown in the above embodiments.

[0083] To implement the above embodiments, this application also proposes a computer program product, including a computer program that, when executed by a processor, implements the nuclear power plant reactor coordination control method as shown in the above embodiments.

[0084] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0085] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0086] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0087] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for coordinated control of reactor machinery in a nuclear power plant, characterized in that, include: Upon receiving a request to increase the power generation load and put the heating system into operation, the turbine is controlled in the Automatic Load Regulator (ALR) mode, and the power generation load of the power generation system is set to the first target load value based on the request, while the opening of the heating hydraulic regulating valve ECV remains unchanged. In response to an increase in power generation load to the first target load value, and a corresponding increase in reactor load to the first target load value, the turbine is controlled to switch from ALR control mode to LL load limiter control mode for heating operation. Heating operation includes opening the heating extraction regulating valve to provide heating load, and during heating operation, the power generation load decreases from the first target load value while the reactor power remains constant. After heating operation is completed, the turbine is controlled to remain in LL control mode. In response to the stable operation of the heating system, the turbine is controlled to remain in LL control mode; During stable operation of the heating system, in response to receiving a first adjustment request for the heating load, the opening of the main steam regulating valve GV and the reactor power are maintained unchanged, and the heating load is adjusted according to the first adjustment request; or, during stable operation of the heating system, in response to receiving a second adjustment request for the power generation load, the turbine is controlled to switch from LL control mode to ALR control mode; the opening of the ECV is maintained unchanged, and based on the second adjustment request, the power generation load of the power generation system is set to a second target load value, so as to adjust the power generation load to the second target load value.

2. The method according to claim 1, characterized in that, The adjustment of the heating load according to the first adjustment request includes: Obtain the stable heating load value of the heating system during stable operation of the heating system; Obtain the target heating load value carried by the first adjustment request; In response to the target heating load value being greater than the stable heating load value, the ECV opening is increased to increase the heating load until the real-time heating load value of the heating system reaches the target heating load value. During this period, the GV opening and reactor power remain unchanged. In response to the target heating load value being less than the stable heating load value, the ECV opening is reduced to reduce the heating load until the real-time heating load value of the heating system reaches the target heating load value, during which time the GV opening and reactor power remain unchanged.

3. The method according to claim 1, characterized in that, The method further includes: Obtain the stable heating load value of the heating system during stable operation of the heating system; Obtain the final heating load value of the heating system after adjusting the power generation load to the second target load value; Based on the stable heating load value and the final heating load value, the opening degree of the ECV is adjusted so that the final heating load value is restored to the stable heating load value. After the final heating load value is restored to the stable heating load value, the turbine is controlled to switch from ALR control mode to LL control mode.

4. The method according to claim 1, characterized in that, During the process of increasing the power generation load to the first target load value or adjusting the power generation load to the second target load value, the GV opening degree is positively correlated with the power generation power, the first stage inlet pressure of the steam turbine is positively correlated with the GV opening degree, and the reactor power is positively correlated with the first stage inlet pressure of the steam turbine.

5. A nuclear power plant reactor coordination control device, characterized in that, include: The first control module is used to control the steam turbine to adopt the automatic load regulator (ALR) control mode after receiving a request to increase the power generation load and put the heating supply into operation, and to set the power generation load of the power generation system to the first target load value based on the request, while maintaining the opening degree of the heating hydraulic regulating valve (ECV) unchanged. The second control module is used to control the steam turbine to switch from ALR control mode to LL control mode for heating operation in response to an increase in power generation load to the first target load value, and an increase in reactor load to the first target load value along with the increase in power generation load. The heating operation includes opening the heating extraction regulating valve to provide heating load, and during the heating operation, the power generation load decreases from the first target load value while the reactor power remains constant. After the heating operation is completed, the steam turbine is controlled to remain in LL control mode. The third control module is used to control the steam turbine to maintain it in LL control mode in response to the stable operation of the heating system. The fourth control module is used to maintain the opening of the main steam regulating valve GV and the reactor power unchanged in response to receiving a first adjustment request for the heating load during the stable operation of the heating system, and to adjust the heating load according to the first adjustment request. The fifth control module is used to control the steam turbine to switch from LL control mode to ALR control mode in response to receiving a second adjustment request for the power generation load during the stable operation of the heating system; maintain the ECV opening unchanged; and set the power generation load of the power generation system to a second target load value based on the second adjustment request, so as to adjust the power generation load to the second target load value.

6. An electronic device, comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method of any one of claims 1-4.

7. A non-transitory computer-readable storage medium storing computer instructions, wherein, The computer instructions are used to cause the computer to perform the method according to any one of claims 1-4.

8. A computer program product comprising a computer program that, when executed by a processor, implements the method according to any one of claims 1-4.

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