Nuclear energy heating unit reactor load regulation method and system

Abstract

The present application relates to a method and system for regulating the load of a nuclear heating unit, the method comprising: collecting the first-stage pressure signal and the steam extraction heating flow signal of the steam turbine of the heating unit; preprocessing the collected signals, and determining the steam turbine load value based on the processed signals; and regulating the reactor power of the heating unit based on the steam turbine load value. The technical solution provided by the present invention not only solves the problem of large deviation between the reactor power and the steam turbine load value in the conventional logic loop during the heating operation of the unit, and improves the control accuracy, but also solves the system disturbance caused by potential human operation errors in curve switching during multi-curve operation, avoids the fluctuation of the operating parameters of the reactor primary loop system during the change of the heating load, and improves the safety and reliability of the operation of the nuclear heating unit during the heating period.

Description

Technical Field

[0001] The present application relates to the field of nuclear energy heating technology, and in particular to a method and system for regulating the load of a nuclear energy heating unit. Background Art

[0002] Now cities have generally adopted centralized heating systems, but heating energy is still mainly fossil energy, and it is difficult to avoid the impact of carbon oxide emissions on the environment. Nuclear energy, as a clean, efficient and stable energy source, can provide users with a steady supply of heat, and nuclear energy heating is gradually becoming another energy supply form of nuclear energy.

[0003] In the normal operation mode of the heating unit of a nuclear power plant (non-heating season), the steam turbine operates in pure condensing conditions, and the coordinated operation of the reactor and steam turbine load (hereinafter referred to as reactor-machine coordination) is generally achieved by the reactor power control system automatically tracking the first-stage pressure of the steam turbine (representing the steam turbine load), and the tracking is based on the function curve of the steam turbine load and the first-stage pressure. When the steam extraction heating is put into operation, the corresponding relationship curve between the steam turbine load and the first-stage pressure will shift with the different steam extraction amounts for heating. Some treatment methods are to adopt a single curve operation mode to maintain the original function curve of the steam turbine load and the first-stage pressure under pure condensing conditions, but this will cause load matching errors in the coordinated operation of the reactor and machine, which will have a potential adverse effect on the safe and stable operation of the nuclear power unit; there is also a plan to reduce the deviation by switching multiple curves of the function curve of the steam turbine load and the first-stage pressure under different steam extraction flow conditions, but this method has the potential for mis-switching when the personnel manually operate, resulting in system operation disturbance problems. Summary of the invention

[0004] The present application provides a method and system for regulating the load of a nuclear power heating unit, so as to at least solve the technical problems in the related art of large deviation of turbine load value and potential mis-switching during manual operation by personnel, which may lead to disturbance of system operation.

[0005] The first embodiment of the present application provides a method for adjusting the load of a nuclear power heating unit, including:

[0006] Collect the first-stage pressure signal of the steam turbine in the heating unit and the extraction steam heating flow signal;

[0007] Preprocessing the collected first-stage pressure signal of the steam turbine and the extraction steam heating flow rate signal, and determining the steam turbine load value based on the preprocessed first-stage pressure signal of the steam turbine and the extraction steam heating flow rate signal;

[0008] The reactor power of the heating unit is adjusted based on the turbine load value.

[0009] The second embodiment of the present application provides a nuclear power heating unit reactor load regulation system, including: a pressure detection module, a steam extraction heating flow detection module, a collection module, a calculation module and a calculation result output module;

[0010] The pressure detection module is used to detect the first-stage pressure of the steam turbine to obtain a first-stage pressure signal;

[0011] The extraction steam heating flow detection module is used to detect the extraction steam heating flow to obtain an extraction steam heating flow signal;

[0012] The acquisition module is used to acquire the first-stage pressure signal and the steam extraction heating flow signal obtained by detection, and send the acquired first-stage pressure signal and the steam extraction heating flow signal to the calculation module;

[0013] The operation module is used to receive the first-stage pressure signal and the extraction steam heating flow rate sent by the acquisition module, determine the steam turbine load value based on the first-stage pressure signal and the extraction steam heating flow rate, and send the determined steam turbine load value to the operation result output module;

[0014] The operation result output module is used to receive the turbine load value from the operation module and send the turbine load value to the reactor power control system. The technical solution provided by the embodiment of the present application brings at least the following beneficial effects:

[0015] The present application provides a method and system for regulating the reactor load of a nuclear energy heating unit, the method comprising: collecting the first-stage pressure signal and the steam extraction heating flow signal of the steam turbine in the heating unit; preprocessing the collected first-stage pressure signal and the steam extraction heating flow signal of the steam turbine, and determining the steam turbine load value based on the preprocessed first-stage pressure signal and the steam extraction heating flow signal of the steam turbine; and regulating the reactor power of the heating unit based on the steam turbine load value. The technical solution provided by the present invention not only solves the problem of large deviation between the reactor power and the steam turbine load value in the conventional logic loop during the heating operation of the unit, and improves the control accuracy, but also solves the system disturbance caused by the artificial curve switching operation error when operating in a multi-curve mode, avoids the fluctuation of the operating parameters of the reactor primary loop system during the change of the heating load, and improves the safety and reliability of the operation of the nuclear energy heating unit during the heating period.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A structural diagram of a method for regulating the reactor load of a nuclear power heating unit provided according to an embodiment of the present application;

[0019] Figure 2 A pressure compensation curve diagram in a method for regulating the reactor load of a nuclear power heating unit provided according to an embodiment of the present application;

[0020] Figure 3 : A structural diagram of a nuclear power heating unit reactor load regulation system provided according to an embodiment of the present application;

[0021] Figure 4 Another structural diagram of a nuclear power heating unit reactor load regulation system provided according to an embodiment of the present application;

[0022] Figure 5 A structural diagram of a computing module in a reactor load regulation system of a nuclear power heating unit provided according to an embodiment of the present application;

[0023] Figure 6 Another structural diagram of a computing module in a reactor load regulation system of a nuclear power heating unit provided according to an embodiment of the present application;

[0024] Figure 7 A detailed functional block diagram of an operation module in a reactor load regulation system of a nuclear power heating unit provided according to an embodiment of the present application;

[0025] Description of reference numerals:

[0026] Pressure detection module 1, extraction steam heating flow detection module 2, acquisition module 3, calculation module 4, calculation result output module 5, human-machine operation module 6, pressure compensation module 41, selection module 42, adder 43, pure condensing condition load module 44, first threshold module 45, second threshold module 46, third threshold module 47, first input terminal 411, second input terminal 421 and first output terminal 422. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0028] The present application proposes a method and system for regulating the load of a nuclear heating unit, the system comprising: a pressure detection module 1, a steam extraction heating flow detection module 2, a collection module 3, a calculation module 4 and a calculation result output module 5; based on the above modules, the steam turbine load value is determined, and then the steam turbine load value is sent to the reactor power control system to adjust the system. The technical solution provided by the present invention not only solves the problem of large deviation between the reactor power and the steam turbine load value in the conventional logic loop during the heating operation of the unit, and improves the control accuracy, but also solves the system disturbance caused by human curve switching operation errors during multi-curve operation, avoids the fluctuation of the operating parameters of the reactor primary loop system during the change of the heating load, and improves the safety and reliability of the operation of the nuclear heating unit during the heating period.

[0029] The following describes the method and system for regulating the reactor load of a nuclear power heating unit according to an embodiment of the present application with reference to the accompanying drawings.

[0030] Embodiment 1

[0031] Figure 1 A flow chart of a method for regulating the load of a nuclear power heating unit provided in an embodiment of the present disclosure is shown in FIG. Figure 1 As shown, the method includes:

[0032] Step 1: Collect the first-stage pressure signal and extraction steam heating flow signal of the steam turbine in the heating unit;

[0033] Step 2: preprocessing the collected first-stage pressure signal of the steam turbine and the extraction steam heating flow signal, and determining the steam turbine load value based on the preprocessed first-stage pressure signal of the steam turbine and the extraction steam heating flow signal;

[0034] Step 3: Adjusting the reactor power of the heating unit based on the steam turbine load value.

[0035] In the disclosed embodiment, the preprocessing of the collected first-stage pressure signal of the steam turbine and the extraction steam heating flow signal includes:

[0036] The first-level pressure signal and the steam extraction heat supply flow rate signal collected by multiple channels are respectively subjected to two-out-of-three redundancy processing.

[0037] In an embodiment of the present disclosure, determining the turbine load value based on the preprocessed first-stage pressure signal of the turbine and the extraction steam heating flow signal includes:

[0038] Determine the first-level pressure value required for compensation by using the extraction steam heating flow signal and a pre-acquired pressure compensation curve;

[0039] Determine the first-stage pressure value required by the heating system according to the first-stage pressure value required to be compensated and the collected first-stage pressure signal;

[0040] The steam turbine load value is determined by using the first stage pressure value required by the heating system and the predetermined pure condensing condition first stage pressure and steam turbine load curve.

[0041] Furthermore, the process of obtaining the pre-acquired pressure compensation curve includes:

[0042] Obtain the curve between the first-stage pressure of the steam turbine and the steam turbine load corresponding to different heating steam extraction amounts of the heating unit;

[0043] Selecting the required number of curves and curves from the obtained curves based on the maximum steam extraction amount that the heating unit can bear and the steam extraction amount corresponding to the maximum acceptable load error;

[0044] Determine the average pressure deviation between each selected curve and the corresponding curve of the pure condensation condition, and use the average pressure deviation as the first-level pressure value required for compensation;

[0045] A pressure compensation curve is obtained based on the first-level pressure value required to be compensated.

[0046] It should be noted that: according to calculation and analysis, the curves between the first-stage pressure of the steam turbine and the steam turbine load corresponding to different extraction volumes of the heating units of nuclear power plants are a series of basically parallel curve groups. On this basis, the number of curves to be adopted can be selected according to the maximum extraction volume that the unit can bear and the extraction volume value that the load error can accept, and then the pressure deviation is calculated as the compensation value through the selected curve. For example, the maximum extraction volume of the unit is 1500t / h, and the load matching error within 250t / h is acceptable through evaluation, and the pure condensing condition, 500t / h, 1000t / h and 1500t / h curves can be selected for operation.

[0047] Then, the average pressure deviation between 500t / h, 1000t / h and 1500t / h and the pure condensation curve can be calculated, which is the pressure compensation value. Based on this, the pressure compensation curve is generated as follows: Figure 2 As shown, different pressure compensations can be achieved according to the actual heat supply, and finally the actual turbine load corresponding to the extraction flow condition is output after the pure condensation curve module. An example is shown below:

[0048] When the extraction steam flow rate is less than 250t / h, the system operates under the pure condensing condition curve, and no compensation is required at this time; when the extraction steam flow rate slowly increases to more than 250t / h, the compensation curve will reach the P1 step at a certain rate (such as 2% / s), and maintain the P1 compensation value between the flow rates of 250-750t / h;

[0049] When the extraction steam flow rate increases slowly to more than 750 t / h, the compensation curve reaches the P2 step at a certain rate (such as 2% / s) and maintains the P2 compensation value between the flow rates of 750-1250 t / h.

[0050] When the extraction steam flow rate increases to more than 1250 t / h, the compensation curve reaches the P3 step at a certain rate (such as 2% / s), and maintains the P3 compensation value after the flow rate exceeds 1250 t / h.

[0051] In summary, the method for regulating the reactor and turbine load of a nuclear energy heating unit proposed in the present application not only solves the problem of large deviation between the reactor power and the turbine load value in the conventional logic loop during the heating operation of the unit, thereby improving the control accuracy, but also solves the system disturbance caused by human curve switching operation errors during multi-curve operation, avoids fluctuations in the operating parameters of the reactor primary loop system during changes in the heating load, and improves the safety and reliability of the operation of the nuclear energy heating unit during the heating period.

[0052] Embodiment 2

[0053] Figure 3 The structure diagram of a nuclear power heating unit reactor load regulation system provided by the embodiment of the present disclosure is as follows: Figure 3 As shown, the system includes: a pressure detection module 1, a steam extraction heat supply flow detection module 2, a collection module 3, a calculation module 4 and a calculation result output module 5;

[0054] The pressure detection module 1 is used to detect the first-stage pressure of the steam turbine to obtain a first-stage pressure signal;

[0055] The extraction steam heating flow rate measuring device 2 is used to detect the extraction steam heating flow rate to obtain an extraction steam heating flow rate signal;

[0056] The acquisition module 3 is used to acquire the first-stage pressure signal and the steam extraction heating flow signal obtained by detection, and send the acquired first-stage pressure signal and the steam extraction heating flow signal to the calculation module 4;

[0057] The operation module 4 is used to receive the first-stage pressure signal and the extraction steam heating flow sent by the acquisition module, and determine the steam turbine load value based on the first-stage pressure signal and the extraction steam heating flow, and send the determined steam turbine load value to the operation result output module 5;

[0058] The operation result output module 5 is used to receive the steam turbine load value from the operation module and send the steam turbine load value to the reactor power control system.

[0059] In the embodiments of the present disclosure, Figure 4 As shown, the control system further includes: a human-machine operation module 6;

[0060] The human-machine operation module 6 is used for information exchange with the operation module 4, including: manual operation, fixed value input, action instructions and signal display of turbine load value, alarm processing and function activation and deactivation in the core operation processing process.

[0061] It should be noted that, before determining the steam turbine load value based on the first-stage pressure signal and the extraction steam heat supply flow rate, the method further includes:

[0062] Preprocessing the received first-stage pressure signal and extraction steam heating flow rate signal;

[0063] Among them, the preprocessing includes: performing three-out-of-two redundant processing on the first-level pressure signals and steam extraction heating flow signals collected by multiple channels, and judging whether the range corresponding to the collected signal exceeds the preset range and judging whether the value of the collected signal is greater than the preset signal threshold; when the range corresponding to the collected signal exceeds the preset range or the value of the collected signal is greater than the preset signal threshold, an alarm signal is sent to the human-machine operation module 6.

[0064] In the embodiments of the present disclosure, Figure 5 As shown, the operation module 4 includes: a pressure compensation module 41, a selection module 42, an adder 43 and a pure condensation condition load module 44;

[0065] The pressure compensation module 41 is used to determine the first-level pressure compensation value corresponding to the extraction steam heating flow signal using the extraction steam heating flow signal received by the calculation module, and send the compensation value to the selection module 42; wherein the pressure compensation module is provided with a pre-acquired pressure compensation curve;

[0066] It should be noted that the working principle of the pressure compensation module 41 is as follows:

[0067] According to calculation and analysis, the curves between the first-stage pressure of the steam turbine and the steam turbine load corresponding to different steam extraction amounts for heating of nuclear power plant units are a series of basically parallel curve groups. On this basis, the number of curves to be adopted can be selected according to the maximum steam extraction amount that the unit can withstand and the acceptable steam extraction amount value for load error, and then the pressure deviation is calculated as the compensation value through the selected curve. For example, the maximum steam extraction amount of the unit is 1500t / h, and through evaluation, the load matching error within 250t / h of steam extraction amount is acceptable, and the pure condensing condition, 500t / h, 1000t / h and 1500t / h curves can be selected, wherein the pure condensing condition, 500t / h, 1000t / h and 1500t / h curves are all curves drawn with reactor power as the horizontal coordinate and the first-stage pressure as the vertical coordinate. Further, refer to Figure 2 , the average pressure deviation between 500t / h, 1000t / h and 1500t / h and the pure condensation curve can be calculated, which is the pressure compensation value. Based on this, the pressure compensation curve is generated as follows Figure 2 As shown, different pressure compensations can be achieved according to the actual heat supply, and finally the actual turbine load corresponding to the extraction flow condition is output after the pure condensation curve module. An example is as follows: when the extraction flow is less than 250t / h, the system operates under the pure condensation condition curve, and no compensation is required at this time; when the extraction flow increases slowly to more than 250t / h, the compensation curve will reach the P1 step at a certain rate (such as 2% / s), and maintain the P1 compensation value between the flow rate of 250-750t / h; when the extraction flow increases slowly to more than 750t / h, the compensation curve reaches the P2 step at a certain rate (such as 2% / s), and maintains the P2 compensation value between the flow rate of 750-1250t / h; when the extraction flow increases to more than 1250t / h, the compensation curve reaches the P3 step at a certain rate (such as 2% / s), and maintains the P3 compensation value after the flow rate exceeds 1250t / h.

[0068] In the embodiment of the present disclosure, the selection module 42 is used to receive the compensation value sent by the pressure compensation module 41, and send the compensation value to the adder 43;

[0069] The adder 43 is used to receive the compensation value sent by the selection module 42 and the first-level pressure signal received by the operation module, and send the result of the addition of the two to the pure condensation condition load module 44;

[0070] The pure condensing condition load module 44 is used to receive the result sent by the adder 43, and then determine the turbine load value based on the result.

[0071] In the embodiments of the present disclosure, Figure 6 As shown, the operation module 4 further includes: a first threshold module 45, a second threshold module 46 and a third threshold module 47;

[0072] The first threshold module 45, the second threshold module 46 and the third threshold module 47 are arranged at the output end of the selection module 42, and are used to determine the operating state of the system;

[0073] It should be noted that the compensation operation state includes: a preset pure condensation operation state, a first compensation operation state, a second compensation operation state and a third compensation operation state.

[0074] Based on the above system, the specific application of the system provided by the embodiment of the present disclosure is explained. First, the first-stage pressure of the steam turbine is detected by the pressure detection module 1 to obtain the first-stage pressure signal, and the extraction steam flow detection module 2 is used to detect the heating extraction steam flow to obtain the extraction steam heating flow signal; secondly, the first-stage pressure signal and the extraction steam heating flow signal are collected by the acquisition module 3, and the collected first-stage pressure signal and heating flow signal of the steam turbine are processed by the module 4, which mainly includes: three-out-of-two redundant processing of the signal, channel deviation fault alarm, and interlocking, alarm, display processing of the signal threshold, etc. The result of the signal processing is sent to the human-machine operation module 6, and at the same time, the calculation module 4 determines the steam turbine load value using the processed signal, and sends the load value to the human-machine operation module 6 and the calculation result output module 5; then, the human-machine operation module 6 is used to receive The load value sent by the operation module is displayed, and the operation result output module 5 is used to receive the turbine load value sent by the operation module and send the turbine load value to the reactor power control system. Finally, the reactor power control system controls the reactor coolant to enter the steam generator based on the load value. The steam generator is the connecting bridge between the primary and secondary circuits of the nuclear power plant. The reactor coolant heats the secondary circuit water in the steam generator while also taking away the heat of the primary circuit, cooling the reactor core. After the secondary circuit water is heated in the steam generator, the steam generator outlet generates main steam. The main steam enters the high-pressure cylinder of the steam turbine unit and works through the high-pressure cylinder to drive the generator to generate electricity. A part of the exhaust steam from the high-pressure cylinder directly enters the heat network heater after passing through the steam extraction pipeline and the fast-closing regulating valve. The heat network heater heats the heating circulating water entering it, and finally realizes external heat supply by heating the circulating water.

[0075] The computing module 4 is used to receive the first-stage pressure signal and the steam extraction heat supply flow signal sent by the acquisition module, and determine the turbine load value by using the received signal, including: Figure 7 As shown, Figure 7 It is a detailed functional block diagram of the operation module 4, and describes the detailed relationship between the module 4 and the modules 3, 5, and 6. Figure 7Module 4 undertakes the key calculation and processing tasks. The steam extraction heating flow signal from the acquisition module 3 enters the pressure compensation module 41 through the first input terminal 411. Here, according to the preset corresponding relationship curve, the first-stage pressure compensation value corresponding to the current steam flow is output to the second input terminal 421 of the selection module 42, and the other input terminal value of the selection module 42 is "0". When the steam extraction is put into operation, the first output terminal 422 of the module 42 will output the value of the second input terminal 421. When the steam extraction heating is not put into operation, the first output terminal 422 is "0" (no compensation at this time). The compensated pressure value will be sent to the adder 43, where it will be added with the actual first-stage pressure value of the steam turbine collected. The corrected calculation result is sent to the pure condensing condition load module 44. The steam turbine load output by the pure condensing curve module is the actual steam turbine load considering the steam extraction condition, that is, the current steam turbine load value output by the calculation module 4. As the load instruction of the reactor, it is finally sent to the reactor control system after passing through the calculation result output module interface 5, and the reactor power control is completed here. The first threshold module 45 , the second threshold module 46 and the third threshold module 47 will determine which compensation operation state the system is currently in according to the first output terminal 422 of the selection module 42 , so as to facilitate monitoring by operators.

[0076] In summary, the nuclear energy heating unit reactor load regulation system proposed in this application includes: a pressure detection module 1, a steam extraction heating flow detection module 2, a collection module 3, a calculation module 4 and a calculation result output module 5; based on the above modules, the turbine load value is determined, and then the turbine load value is sent to the reactor power control system to adjust the system. The technical solution provided by the present invention not only solves the problem of large deviation between the reactor power and the turbine load value in the conventional logic loop during the unit heating operation, and improves the control accuracy, but also solves the system disturbance caused by human curve switching operation errors during multi-curve operation, avoids the fluctuation of the operating parameters of the reactor primary loop system during the heating load change, and improves the safety and reliability of the operation of the nuclear energy heating unit during the heating period.

[0077] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0078] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0079] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for regulating the load of a nuclear power heating unit, characterized in that: include: Collect the first-stage pressure signal and extraction steam heating flow signal of the heating unit steam turbine; Preprocessing the collected first-stage pressure signal of the steam turbine and the steam extraction heating flow signal, determining the first-stage pressure value required for compensation based on the pre-acquired pressure compensation curve and the pre-processed steam extraction heating flow signal, determining the first-stage pressure value required for the heating system according to the pre-processed first-stage pressure signal and the first-stage pressure value required for compensation, and determining the turbine load value using the pre-determined pure condensing condition first-stage pressure and turbine load curve and the first-stage pressure value required for the heating system; adjusting the reactor power of the heating unit based on the steam turbine load value; The process of obtaining the pre-acquired pressure compensation curve includes: Obtain the curve between the first-stage pressure of the steam turbine and the steam turbine load corresponding to different heating steam extraction amounts of the heating unit; Selecting the required number of curves and curves from the obtained curves based on the maximum steam extraction amount that the heating unit can bear and the steam extraction amount corresponding to the maximum acceptable load error; Determine the average pressure deviation between each selected curve and the corresponding curve of the pure condensation condition, and use the average pressure deviation as the first-level pressure value required for compensation; A pressure compensation curve is obtained based on the first-level pressure value required to be compensated.

2. The method for regulating the load of a nuclear power heating unit according to claim 1, characterized in that: The preprocessing of the collected first-stage pressure signal of the steam turbine and the extraction steam heating flow rate signal comprises: The first-level pressure signal and the steam extraction heat supply flow rate signal collected by multiple channels are respectively subjected to two-out-of-three redundancy processing.

3. A nuclear power heating unit reactor and unit load regulation system based on the nuclear power heating unit reactor and unit load regulation method according to claim 1 or 2, characterized in that: include: Pressure detection module, extraction steam heating flow detection module, acquisition module, calculation module and calculation result output module; The pressure detection module is used to detect the first-stage pressure of the steam turbine to obtain a first-stage pressure signal; The extraction steam heating flow detection module is used to detect the extraction steam heating flow to obtain an extraction steam heating flow signal; The acquisition module is used to acquire the first-stage pressure signal and the steam extraction heating flow signal obtained by detection, and send the acquired first-stage pressure signal and the steam extraction heating flow signal to the operation module; The operation module is used to receive the first-stage pressure signal and the extraction steam heating flow rate sent by the acquisition module, determine the steam turbine load value based on the first-stage pressure signal and the extraction steam heating flow rate, and send the determined steam turbine load value to the operation result output module; The operation result output module is used to receive the steam turbine load value from the operation module and send the steam turbine load value to the reactor power control system.

4. The nuclear power heating unit reactor load regulation system according to claim 3, characterized in that: Also includes: Human-machine operation module; The human-machine operation module is used to exchange information with the operation module; The information interaction includes: manual operation, fixed value input, action instructions and signal display of turbine load value, alarm processing and function activation and deactivation in the core computing process.

5. The nuclear power heating unit reactor load regulation system according to claim 4, characterized in that: Before determining the steam turbine load value based on the first stage pressure signal and the extraction steam heat supply flow rate, the method further includes: Preprocessing the received first-stage pressure signal and extraction steam heating flow rate signal; Among them, the preprocessing includes: performing three-out-of-two redundant processing on the first-level pressure signals and steam extraction heating flow signals collected by multiple channels, and judging whether the range corresponding to the collected signal exceeds the preset range and judging whether the value of the collected signal is greater than the preset signal threshold; when the range corresponding to the collected signal exceeds the preset range or the value of the collected signal is greater than the preset signal threshold, an alarm signal is sent to the human-machine operation module.

6. The nuclear power heating unit reactor load regulation system according to claim 3, characterized in that: The operation module includes: a pressure compensation module, a selection module, an adder and a pure condensation condition load module; The pressure compensation module is used to determine the first-level pressure compensation value corresponding to the extraction steam heating flow signal by using the extraction steam heating flow signal received by the calculation module, and send the compensation value to the selection module; The selection module is used to receive the compensation value sent by the pressure compensation module and send the compensation value to the adder; The adder is used to receive the compensation value sent by the selection module and the first-level pressure signal received by the operation module, and send the result of adding the compensation value to the first-level pressure value corresponding to the first-level pressure signal received by the operation module to the pure condensing condition load module; The pure condensing condition load module is used to receive the result sent by the adder, and then determine the turbine load value based on the result.

7. The nuclear power heating unit reactor load regulation system according to claim 6, characterized in that: The pressure compensation module is provided with a pre-acquired pressure compensation curve.

8. The nuclear power heating unit reactor load regulation system according to claim 6, characterized in that: The operation module also includes: a first threshold module, a second threshold module and a third threshold module; The first threshold module, the second threshold module and the third threshold module are arranged at the output end of the selection module, and are used to determine the operating state of the system; The compensation operation state includes: a preset pure condensation operation state, a first compensation operation state, a second compensation operation state and a third compensation operation state.

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