Control method and device of molten salt heat release system, storage medium and electronic equipment

Abstract

The application discloses a molten salt heat release system control method, device, storage medium and electronic equipment. The method comprises the following steps: according to the pressure demand of the steam supply header and the corresponding steam extraction pressure response characteristics of the four-extraction heat exchanger and the heat recovery heat exchanger, the opening degrees of the steam side inlet regulating valve of the four-extraction heat exchanger and the steam side inlet regulating valve of the heat recovery heat exchanger are cooperatively adjusted; according to the steam turbine admission thrust balance demand, the steam extraction flow characteristics associated with the steam side inlet regulating valve opening degree of the heat recovery heat exchanger and the steam extraction unit load, the steam side inlet regulating valve opening degree of the main steam heat exchanger is adjusted; according to the salt side outlet temperature of the four-extraction heat exchanger, the heat recovery heat exchanger and the main steam heat exchanger and the steam side inlet regulating valve opening degree of each, the salt side inlet regulating valve opening degree of each is adjusted respectively, so as to maintain the stability of the molten salt storage tank liquid level and temperature; according to the opening degrees of the steam side inlet regulating valve of the four-extraction heat exchanger and the steam side inlet regulating valve of the heat recovery heat exchanger, the steam supply amount of the steam generation system is adjusted, and the steam supply position is adjusted.

Description

Technical Field

[0001] This application relates to the field of power grid technology, and in particular to a control method, apparatus, storage medium and electronic equipment for a molten salt exothermic system. Background Technology

[0002] In the actual operation of a molten salt exothermic system, stable steam supply and heat exchange require the coordinated operation of multiple devices, including the four extraction heat exchangers, the hot reheat heat exchangers, and the main steam heat exchangers. However, in existing technologies, the extraction steam control valves for each device typically operate independently. That is, the steam-side inlet valves of the four extraction heat exchangers, the hot reheat heat exchangers, and the main steam heat exchangers are operated separately based on a single control objective. This independent control method fails to consider the interactions between the various extraction steam branches, heat exchange equipment, and auxiliary systems within the system, resulting in insufficient coordination of the entire system's operation. Summary of the Invention

[0003] In view of the above problems, this application provides a control method, apparatus, storage medium and electronic equipment for a molten salt exothermic system.

[0004] To solve the above-mentioned technical problems, this application proposes the following solution:

[0005] In a first aspect, this application provides a control method for a molten salt exothermic system. The method includes: coordinating the opening of the steam-side inlet valves of the four extraction heat exchangers and the hot reheat heat exchanger based on the pressure demand of the steam supply header and the extraction steam pressure response characteristics of the four extraction heat exchangers and the hot reheat heat exchanger; adjusting the opening of the steam-side inlet valve of the main steam heat exchanger based on the turbine inlet thrust balance demand, the extraction steam flow characteristics associated with the opening of the steam-side inlet valve of the hot reheat heat exchanger, and the load of the extraction steam unit; adjusting the opening of the salt-side inlet valves of the four extraction heat exchangers, the hot reheat heat exchanger, and the main steam heat exchanger based on their respective salt-side outlet temperatures and the opening of their respective steam-side inlet valves to maintain stable molten salt tank levels and temperatures; and adjusting the steam supply of the steam generation system based on the opening of the steam-side inlet valves of the four extraction heat exchangers and the hot reheat heat exchanger to achieve steam supply replenishment.

[0006] Secondly, this application provides a control device for a molten salt exothermic system, the control device comprising:

[0007] The first regulating module is used to coordinate the opening of the steam-side inlet regulating valve of the four extraction heat exchanger and the steam-side inlet regulating valve of the hot reheat heat exchanger according to the pressure demand of the steam supply header and the steam pressure response characteristics of the four extraction heat exchanger and the hot reheat heat exchanger.

[0008] The second adjustment module is used to adjust the opening of the main steam heat exchanger steam side inlet valve according to the steam turbine inlet thrust balance requirements, the extraction steam flow characteristics related to the steam side inlet valve opening of the heat reheat heat exchanger, and the extraction steam unit load.

[0009] The third adjustment module is used to adjust the opening of the salt side inlet valve of each of the four extraction heat exchangers, the hot reheat heat exchanger, and the main steam heat exchanger according to their respective salt side outlet temperature and steam side inlet valve opening, so as to maintain the stability of the liquid level and temperature of the molten salt storage tank.

[0010] The fourth regulating module is used to adjust the steam supply of the steam generation system according to the opening of the steam-side inlet regulating valve of the four extraction heat exchanger and the steam-side inlet regulating valve of the reheat heat exchanger, so as to realize steam supply replenishment.

[0011] To achieve the above objectives, according to a third aspect of this application, a storage medium is provided, the storage medium including a stored program, wherein, when the program is executed, the device where the storage medium is located is controlled to perform the control method of the molten salt exothermic system of the first aspect.

[0012] To achieve the above objectives, according to a fourth aspect of this application, an electronic device is provided, the device including at least one processor, and at least one memory and bus connected to the processor; wherein the processor and memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the control method of the molten salt exothermic system of the first aspect described above.

[0013] By employing the above-described technical solution, the technical solution provided in this application has at least the following advantages:

[0014] Firstly, in the regulation stages of the four extraction heat exchangers and the hot reheat heat exchanger, the response is not isolated to their respective local targets. Instead, it is centered on the unified pressure demand of the steam supply header, and coordinated with the extraction steam pressure response characteristics of both. This ensures that the actions of the two types of valves are mutually adapted and responsive, avoiding interference from a single valve adjustment on the other branch, and achieving coordinated stability at the steam supply source. The opening change of the steam-side inlet valve of the hot reheat heat exchanger directly determines the magnitude and trend of its extraction steam flow rate, and this extraction steam flow rate characteristic is the core basis for determining the target extraction steam flow rate of the main steam heat exchanger. Based on the extraction steam flow rate associated with the opening of the steam-side inlet valve of the hot reheat heat exchanger, and combined with the turbine inlet thrust balance requirements and the real-time load status of the extraction steam unit, the opening of the steam-side inlet valve of the main steam heat exchanger is adjusted. This adjustment method ensures that the main steam heat exchanger's operation closely follows the changing operating status of the hot reheat heat exchanger, forming dynamic coordination between the extraction steam branches. Through precise matching of the main steam extraction flow rate and the hot reheat extraction flow rate, it compensates for deviations in the turbine's inlet thrust in real time, ensuring the turbine's operational balance. Then, the salt-side inlet valve adjustments for the four extraction heat exchangers, the hot reheat heat exchanger, and the main steam heat exchanger all use the corresponding steam-side inlet valve opening as a key reference, transmitting the steam-side adjustment status to the salt side in real time. This ensures that the salt-side valve's movement is synchronized with the steam-side valve opening changes, achieving coordinated heat exchange between the steam and salt sides within each heat exchanger. Finally, the steam supply adjustment of the steam generation system is directly based on the opening signals of the steam-side inlet valves of the four extraction heat exchangers and the hot reheat heat exchanger, allowing the steam supply replenishment action to respond in real time to changes in the core steam source's operation, forming coordinated complementarity among multiple steam sources. Throughout the entire control process, the adjustment results of the previous stage become the basis for the adjustment of the next stage. All adjustment actions are interconnected and mutually supportive, constructing a full-chain collaborative mechanism covering the steam supply source, steam extraction branch, heat exchange unit and replenishment system. This breaks the limitations of independent adjustment of each piece of equipment and realizes the coordinated operation of the system as a whole.

[0015] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0017] Figure 1 This paper shows a schematic diagram of the structure of a molten salt exothermic system provided in an embodiment of this application;

[0018] Figure 2 A schematic flowchart of a control method for a molten salt exothermic system provided in an embodiment of this application is shown.

[0019] Figure 3 A flowchart illustrating another control method for a molten salt exothermic system provided in an embodiment of this application is shown.

[0020] Figure 4 This paper shows a schematic diagram of the structure of a control device for a molten salt exothermic system provided in an embodiment of this application;

[0021] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of this application is shown. Detailed Implementation

[0022] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0023] In the embodiments of this application, the terms "first," "second," etc., do not have a logical or temporal dependency, nor do they limit the quantity or execution order. It should also be understood that although the following description uses the terms "first," "second," etc., to describe various elements, these elements should not be limited by the terms. These terms are merely used to distinguish one element from another.

[0024] In this application, the term "at least one" means one or more, and the term "multiple" means two or more.

[0025] It should also be understood that the term “if” can be interpreted as “when” or “upon”, or “in response to determination” or “in response to detection”. Similarly, depending on the context, the phrase “if determination…” or “if detection [the stated condition or event]” can be interpreted as “when determination…” or “in response to determination…” or “when detection [the stated condition or event]” or “in response to detection [the stated condition or event]”.

[0026] To better understand the overall architecture and connection logic of the molten salt exothermic system, the structure of the molten salt exothermic system provided in the embodiments of this application will be described in detail, as follows: Figure 1As shown. This system is based on a conventional coal-fired power unit, integrating an extraction steam storage system, a steam generation system, and a molten salt storage and circulation system to form a complete architecture for multi-steam source coordinated steam supply. Core components include a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a generator, a boiler, a condenser, a deaerator, a high-pressure heater, a low-pressure heater, a four-extraction superheater, a hot reheat superheater, a main steam superheater, a high-temperature molten salt tank, a low-temperature molten salt tank, a variable-frequency hot salt pump, a variable-frequency cold salt pump, a steam supply header, a molten salt deaerator, and various control valves and adjustable rotating baffles. The generator is connected to the power grid, converting the unit's mechanical energy into electrical energy and feeding it into the grid. The steam generated by the boiler flows sequentially through the high-pressure cylinder, intermediate-pressure cylinder, and low-pressure cylinder to perform work. The steam after performing work enters the condenser for condensation, and then passes through the deaerator, high-pressure heater, and low-pressure heater before returning to the boiler, forming a conventional thermodynamic cycle. The extraction steam storage system obtains steam through three extraction branches: the main steam side tap draws steam from the unit's main steam pipeline, which, after temperature and pressure regulation by a desuperheater and pressure reducer, enters the main steam superheat heat exchanger; the high-temperature reheat side tap draws steam from the high-temperature reheat steam pipeline, which, after desuperheating and pressure reduction, enters the hot reheat superheat heat exchanger; and the fourth extraction branch draws steam from the unit's fourth-stage extraction pipeline, which merges into the fourth extraction steam header and enters the fourth extraction superheat heat exchanger. Simultaneously, the fourth extraction steam header branches off via an adjustable rotating baffle to supply steam to the feedwater pump turbine (small turbine). The cold molten salt in the low-temperature molten salt tank is transported to the salt-side inlet of the three heat exchangers via a variable frequency cold salt pump. The flow rate is controlled by the salt-side inlet regulating valve. The cold molten salt exchanges heat with the steam on the steam side within the heat exchanger, heating up to become hot molten salt, which is then transported to the high-temperature molten salt tank for storage. The steam generation system includes a superheater, preheater, evaporator, steam drum, and molten salt deaerator. Hot molten salt in the high-temperature molten salt tank is pumped to the steam generation system via a variable frequency hot salt pump, flowing sequentially through the superheater, evaporator, and preheater. It exchanges heat with feedwater from the molten salt deaerator. After preheating, evaporation, and superheating, the feedwater generates qualified steam, which is then supplied externally through the steam supply header regulating valve. The cooled molten salt, after heat exchange, returns to the low-temperature molten salt tank, completing the molten salt cycle. Each heat exchanger's steam-side inlet is equipped with an extraction steam regulating valve, and the steam supply header is equipped with external steam supply pipelines, enabling centralized steam supply and unified scheduling from multiple steam sources. The coordinated operation of all components provides the hardware foundation for the implementation of subsequent control methods.

[0027] The control method of the molten salt exothermic system will be described in detail below with reference to the accompanying drawings. Figure 2 A flowchart illustrating a control method for a molten salt exothermic system provided in this application is shown. Specifically, it includes the following steps:

[0028] Step 210: Based on the pressure requirements of the steam supply header and the corresponding extraction steam pressure response characteristics of the four extraction heat exchanger and the hot reheat heat exchanger, coordinate the opening of the steam-side inlet valve of the four extraction heat exchanger and the steam-side inlet valve of the hot reheat heat exchanger.

[0029] In molten salt exothermic systems, the pressure stability of the steam supply header directly affects the quality of the external steam supply. The four-extraction heat exchanger and the heat reheat heat exchanger, as core steam supply equipment, must simultaneously adapt their steam extraction volume allocation to the pressure requirements of the steam supply header, the load changes of the extraction turbine unit, and the pressure response characteristics of the equipment itself. First, load range division and related parameter calibration are performed. Based on the ratio of the rated capacity of the extraction turbine unit, the full load range is divided into a low load range (0-30% of rated load), a medium load range (30%-70% of rated load), and a high load range (70%-100% of rated load). These division boundaries can be fine-tuned according to the unit model (e.g., 300MW, 600MW coal-fired power units) and historical operating data. For example, for a 600MW unit, the low load range can be adjusted to 0-25% of rated load to adapt to its pressure response characteristics. For each load range, operational data was collected every 10 minutes for three consecutive months, including step changes in the steam extraction rates of the fourth extraction and hot re-extraction, as well as the corresponding pressure change rates and settling times in the steam supply header. The least squares method was used to calculate the sensitivity of the steam supply header pressure to the two types of steam extraction rates. Based on the sensitivity analysis results, weighting coefficients were assigned to each load range: in the low load range, the hot re-extraction rate had a more significant impact on pressure, with a weighting coefficient of 0.6; in the medium load range, the two factors had a balanced impact, with a weighting coefficient of 0.4; and in the high load range, the fourth extraction rate had a more prominent impact, with a weighting coefficient of 0.3. Simultaneously, historical matching data of steam flow rates for the fourth extraction and hot re-extraction under different steam supply pressure requirements (such as 0.8MPa, 1.0MPa, and 1.2MPa) within each load range are retrieved. This data covers the optimal flow ratio, flow fluctuation range (controlled within ±5%), and pressure stabilization time (not less than 15 minutes). These data are normalized (the flow values ​​are mapped to the 0-1 range) to generate load gradient correlation parameters. These parameters are 1.2 at the beginning and 1.0 at the end in the low load range, 1.0 at the beginning and 0.9 at the end in the medium load range, and 0.9 at the beginning and 0.8 at the end in the high load range, intuitively reflecting the adaptation pattern of the two types of extraction steam flow rates under different loads.

[0030] When the extraction steam turbine unit is running, the current operating load is collected in real time through the unit's DCS system. After determining the corresponding interval through load interval judgment logic, the load gradient correlation parameters of the corresponding interval are extracted, and load adaptation parameters are generated by linear interpolation within the interval. The linear interpolation formula is: k=k1+(P-P1)×(k2-k1) / (P2-P1), where k is the load adaptation parameter, k1 is the load gradient correlation parameter at the beginning of the interval, k2 is the load gradient correlation parameter at the end of the interval, P is the current unit load, P1 is the starting load of the interval, and P2 is the ending load of the interval. For example, if the current unit load is 40% of the rated load (within the medium load range of 30%-70%), then k = 1.0 + (40%-30%) × (0.9-1.0) / (70%-30%) = 0.975; if the current load is 60% of the rated load, then k = 1.0 + (60%-30%) × (0.9-1.0) / (70%-30%) = 0.925, thus achieving precise dynamic matching between the load and the adaptation parameters.

[0031] The nonlinear correlation between the pressure demand of the steam header and the load adaptation parameters was established through experimental testing and data fitting. Five typical load points within each load range were selected (e.g., 10%, 20%, and 30% of rated load in the low load range; 40%, 50%, 60%, and 70% of rated load in the medium load range; and 80%, 90%, and 100% of rated load in the high load range). Six sets of steam header pressure demand values ​​(0.6 MPa to 1.4 MPa, with an interval of 0.2 MPa) were set for each load point. The load adaptation parameters under each operating condition were recorded, resulting in 180 sets of sample data. A cubic polynomial fitting algorithm was used to fit the sample data to establish a nonlinear correlation model: P target =a×k 3 +b×k 2 +c×k+d, where P target Let k be the target pressure, a be the load adaptation parameter, and a, b, c, and d be the fitting coefficients (calculated using the least squares method; for example, the fitting coefficients for a certain unit are a = -0.5, b = 1.2, c = 0.3, and d = 0.2). The model has been validated, and the goodness of fit R0 is [value missing]. 2 A value ≥0.95 accurately describes the nonlinear mapping relationship between pressure demand and load adaptation parameters. During system operation, the pressure demand of the steam header and the currently generated load adaptation parameters are acquired in real time and substituted into the model to calculate the target pressure corresponding to the four-extraction heat exchanger and the heat reheat heat exchanger. This target pressure is dynamically adjusted in real time according to the group load. For example, when the steam header pressure demand is 1.0 MPa and the load adaptation parameter is 0.975, P... target = -0.5 × 0.975 3 +1.2×0.975 2 +0.3×0.975+0.2≈1.02MPa.

[0032] The total extraction steam demand is calculated based on the pressure demand of the steam supply header and the operating load of the extraction steam unit, using a proportional-integral (PI) control algorithm: Q total =Kp×(P req -P act )+Ki×∫(P req -P act )dt+Q base Q total For total steam extraction demand, Kp is the proportional coefficient (range 0.5-2.0, calibrated to 1.2 according to unit characteristics), Ki is the integral coefficient (range 0.1-0.5, calibrated to 0.3), and P... req To meet the pressure requirements of the fuel tank, P act To supply the actual pressure of the valve train manifold, Q base The base extraction steam volume (determined by the current unit load, e.g., Q at 30% rated load) base = 50t / h, Q at 70% rated load base =150t / h). After calculating the total extraction steam demand, the extraction steam share is allocated based on the difference in pressure response characteristics between the fourth extraction and hot re-extraction steam (the pressure response time of the fourth extraction steam is 2-3s, with a fluctuation range of ±3%; the pressure response time of the hot re-extraction steam is 4-5s, with a fluctuation range of ±2%). The allocation adopts a weighted allocation algorithm: Q4 = Q total ×(P4 target / (P4 target +P retarget )×ω4), Q re =Q total -Q4, where Q4 is the extraction steam share of the four-extraction heat exchanger, Q re For the extraction steam ratio of the heat reheat heat exchanger, P4 target For the target pressure of the four-extraction heat exchanger, P retarget Let ω4 be the target pressure of the hot reheat heat exchanger, and ω4 be the extraction steam weighting coefficient for the fourth extraction stage (adjusted according to the load range: 0.4 for low load, 0.5 for medium load, and 0.6 for high load). For example, when the total extraction steam demand is 100 t / h, the target pressure of the fourth extraction heat exchanger is 10 MPa, the target pressure of the hot reheat heat exchanger is 8 MPa, and the current load range is medium (ω4 = 0.5), then Q4 = 100 × (10 / (10+8) × 0.5) ≈ 27.8 t / h, Q re =100-27.8=72.2t / h; if in the high load range (ω4=0.6), then Q4=100×(10 / (10+8)×0.6)≈33.3t / h, Q re =100-33.3=66.7t / h, ensuring that the allocated extraction steam share can make the steam-side outlet pressure of the two types of heat exchangers approach the target pressure, while meeting the total extraction steam demand.

[0033] After the extraction steam share is determined, the steam-side outlet pressure of the fourth extraction heat exchanger and the steam-side outlet pressure of the heat reheat heat exchanger are collected in real time using pressure sensors. The deviation between the actual pressure and the target pressure is calculated: ΔP4 = P4 act -P4 target ΔP re =P react -P retarget The initial control signal, U4, is generated based on the deviation using a proportional-integral-derivative (PID) control algorithm. initial =Kp4×ΔP4+Ki4×∫ΔP4dt+Kd4×dΔP4 / dt, U reinitial =K pre ×ΔP re +Ki re ×∫ΔP re dt+Kd re ×dΔP re / dt, where Kp4, Ki4, and Kd4 are the PID parameters of the four-stage gate (with values ​​of 1.0, 0.2, and 0.1), respectively, and Kp re Ki re Kd re These are the PID parameters for the heat reconditioning gate (values ​​are 0.8, 0.15, and 0.08), and U4. initial U is the initial adjustment signal for the steam-side inlet regulating valve of the four-extraction heat exchanger. reinitial This is the initial adjustment signal for the steam-side inlet control valve of the reheat heat exchanger.

[0034] Because the extraction steam flow rate of the fourth extraction stage and the hot re-extraction steam flow rate have an interactive effect (a 10% change in the fourth extraction steam flow rate will cause a ±2% fluctuation in the hot re-extraction steam pressure, and a 10% change in the hot re-extraction steam flow rate will cause a ±1.5% fluctuation in the fourth extraction steam pressure), a coordination matrix is ​​generated based on the interactive influence law between the two. Pressure interaction coefficients under different extraction steam flow rate combinations are obtained through experimental testing: a11 is the influence coefficient of the fourth extraction steam flow rate on its own pressure (value 1.0), a12 is the influence coefficient of the hot re-extraction steam flow rate on the fourth extraction pressure (value 0.15), a21 is the influence coefficient of the fourth extraction steam flow rate on the hot re-extraction pressure (value 0.2), and a22 is the influence coefficient of the hot re-extraction steam flow rate on its own pressure (value 1.0). A coordination matrix A = [[a11,a12],[a21,a22]] = [[1.0,0.15],[0.2,1.0]]. A decoupling algorithm is used to process the initial regulation signal: U4 = (U4 initial -a12×U reinitial ) / (a11×a22-a12×a21), U re =(U reinitial -a21×U4 initial) / (a11×a22-a12×a21), the decoupled regulation signals U4 and Ure are calculated. These signals drive the steam-side inlet regulating valve of the four extraction heat exchanger and the steam-side inlet regulating valve of the heat reheat heat exchanger to operate, eliminating interactive interference during the regulation process.

[0035] Throughout the control process, the control logic characteristics of the four-extraction steam supply system and the hot reheat steam supply system are fully integrated: when the initial adjustment signal of the steam-side inlet valve of the four-extraction heat exchanger is generated, a feedforward function for different unit loads is incorporated (e.g., the feedforward coefficient is 0.3 when the load is 30% of the rated load, and 0.7 when the load is 70% of the rated load), and upper and lower limits (0%-100%) and acceleration rate (≤5% / s) of the adjustment signal are set. When the steam supply pressure of the small turbine is lower than the normal value (e.g., set to 0.7MPa), the valve interlocking logic is triggered. When there is a problem with the quality of the regulated quantity (pressure signal deviation exceeds ±0.1MPa), a large deviation in the command feedback (deviation between the adjustment signal and the actual valve opening exceeds ±5%), a problem with the valve feedback, or a unit trip, the valve switches to manual control. When the unit trips, the valve overshoots and closes to 0%. The control logic of the steam-side inlet regulating valve of the heat reheat heat exchanger is consistent with that of the four-extraction regulating valve. Its feedforward function, upper and lower limits, acceleration rate, and manual switching, interlocking, and override conditions are all adapted to the four-extraction regulating valve to ensure the control consistency and reliability when the two types of regulating valves work together, ultimately achieving stable control of the steam supply header pressure and improving the overall operating efficiency of the system.

[0036] Step 220: Adjust the opening of the main steam heat exchanger steam side inlet valve according to the turbine inlet thrust balance requirements, the extraction steam flow characteristics related to the steam side inlet valve opening of the heat exchanger, and the extraction steam unit load.

[0037] During the operation of the molten salt exothermic system, changes in the steam extraction flow rate on the steam side of the reheat heat exchanger directly affect the balance of the turbine inlet thrust. The steam extraction flow rate of the main steam heat exchanger needs to adapt to these changes in real time to offset the thrust deviation. Therefore, the thrust balance operating range is first defined based on the turbine inlet thrust balance requirement, the trend of the steam extraction flow rate on the steam side of the reheat heat exchanger, and the load of the extraction unit. The turbine inlet thrust balance requirement is determined based on the unit design parameters and is set to ±3% of the rated thrust value (for example, a 600MW unit with a rated inlet thrust of 1500kN has a balance requirement range of 1455kN-1545kN). The trend of hot re-extraction steam flow rate change is calculated by collecting flow rate data continuously for 5 seconds, and is divided into three categories: flow rate increase (change rate > 0.5 t / h·s), flow rate stability (change rate between -0.2 t / h·s and 0.2 t / h·s), and flow rate decrease (change rate < -0.5 t / h·s). The load of the extraction steam unit is divided into three intervals according to the rated capacity: low load (0-30%), medium load (30%-70%), and high load (70%-100%). Combining the above three dimensions, a total of 9 thrust balance operating condition intervals are divided, namely low load - flow rate increase, low load - flow rate stability, low load - flow rate decrease, medium load - flow rate increase, medium load - flow rate stability, medium load - flow rate decrease, high load - flow rate increase, high load - flow rate stability, and high load - flow rate decrease. The boundary conditions of each interval can be fine-tuned according to the actual operating data of the unit to ensure comprehensive coverage and no overlap of operating conditions.

[0038] For each thrust balance operating condition range, a corresponding thrust adjustment benchmark coefficient is determined. By collecting six consecutive months of operating data within each range, the following data are extracted: the variation range of hot re-extraction steam flow rate (e.g., flow rate variation range of 5t / h-15t / h in the low load-flow-rise range), historical thrust deviation data (e.g., maximum thrust deviation of 30kN and average deviation of 12kN in this range), and the main steam extraction flow rate compensation efficiency (i.e., the thrust compensation value corresponding to a unit change in main steam extraction flow rate, which is experimentally measured to be 0.8kN / t). A weighted calculation method is used to determine the thrust adjustment benchmark coefficient, and the calculation formula is: K=k1×ΔQ re +k2×ΔF avg +k3×η, where K is the thrust adjustment reference coefficient, ΔQ re ΔF represents the average variation in the hot re-extraction steam flow rate within this interval. avg Let η be the average thrust deviation within this range, η be the main steam extraction flow rate compensation efficiency, and k1, k2, and k3 be weighting coefficients (calibrated to values ​​of 0.3, 0.4, and 0.3, respectively). For example, in the low load-flow-increase range, ΔQ re =10t / h, ΔF avg=12kN, η=0.8kN / t, then K=0.3×10+0.4×12+0.3×0.8=8.04; Similarly, the thrust adjustment reference coefficients for each interval are calculated: K=4.2 for low load-flow stability interval, K=7.8 for low load-flow decrease interval, K=9.5 for medium load-flow increase interval, K=5.1 for medium load-flow stability interval, K=8.9 for medium load-flow decrease interval, K=11.3 for high load-flow increase interval, K=6.7 for high load-flow stability interval, and K=10.2 for high load-flow decrease interval. All coefficients have been verified under actual working conditions to ensure that the compensation accuracy meets the thrust balance requirements.

[0039] During system operation, the turbine thrust sensor collects the inlet steam thrust monitoring value in real time, compares it with the turbine inlet steam thrust balance requirement, and obtains the thrust deviation ΔF = F. act -F req , where F act For real-time monitoring values, F req This represents the median value of the thrust balance requirement (e.g., 1500 kN as mentioned above). When ΔF is positive, it indicates that the inlet steam thrust is too high, requiring an increase in the main steam extraction flow rate to offset the deviation; when ΔF is negative, it indicates that the inlet steam thrust is too low, requiring a decrease in the main steam extraction flow rate. Simultaneously, the current steam extraction flow rate Q on the heat reheat exchanger is collected via a flow sensor. react The thrust balance operating condition range and the corresponding thrust adjustment reference coefficient K are determined based on the current load of the extraction steam unit and the change trend of the hot re-extraction steam flow rate.

[0040] Target extraction steam flow rate Q of the main steam heat exchanger maintarget Calculate Q using the following formula: maintarget =Q react ×K×|ΔF| / F req +Q mainbase Q mainbase The base extraction steam flow rate is determined by the current load of the extraction steam unit (Q at low load). mainbase =10t / h, Q at medium load mainbase =25t / h, Q at high load mainbase =40t / h). The core logic of this formula is to dynamically calculate the compensation flow rate based on the hot re-extraction steam flow rate, the thrust adjustment benchmark coefficient, and the thrust deviation, and then add the base extraction steam flow rate to obtain the target value. For example, if the unit is currently in the medium load-flow-increasing range (K=9.5), the current hot re-extraction steam flow rate Q react =30t / h, real-time thrust monitoring value F act =1530kN, thrust balance requirement median value F req =1500kN, then ΔF = 30kN, Q maintarget=30×9.5×30 / 1500+25=30.7t / h; If the real-time thrust monitoring value F act =1470kN, ΔF = -30kN, then Q maintarget =30×9.5×30 / 1500+25= Also 30.7t / h, thrust balance is achieved only through subsequent flow deviation adjustment.

[0041] Once the target extraction steam flow rate is determined, the actual extraction steam flow rate Q on the steam side of the main steam heat exchanger is collected using a flow sensor. mainact , with the target extraction steam flow rate Q maintarget The flow deviation ΔQ was obtained by comparison. main =Q mainact -Q maintarget Based on this flow deviation, a PID control algorithm is used to generate the opening adjustment signal of the steam-side inlet valve of the main steam heat exchanger. The PID parameters are set after calibration as follows: proportional coefficient Kp = 1.2, integral coefficient Ki = 0.3, derivative coefficient Kd = 0.1, the output range of the adjustment signal is 0%-100%, and the acceleration rate is set to ≤4% / s to avoid system fluctuations caused by excessively fast valve movement.

[0042] During the control process, the control logic characteristics of the main steam heat exchanger steam-side inlet control valve are fully integrated: the valve setpoint is directly related to the pressure demand corresponding to the target extraction steam flow rate, and the actual value is the real-time collected extraction steam flow rate. The feedforward control adopts a function of the hot reheat heat exchanger steam-side inlet control valve, that is, the main steam control valve opening is adjusted in advance according to the opening change of the hot reheat control valve. For example, when the hot reheat control valve opening increases by 10%, the main steam control valve opening increases by 3% feedforward, and a limit (0%-10%) is set on the feedforward signal to ensure that the feedforward adjustment is appropriate. The conditions for switching the control valve to manual control include poor quality of the controlled quantity (flow signal deviation exceeds ±0.5t / h), large command feedback deviation (deviation between the control signal and the actual valve opening exceeds ±5%), poor quality of valve feedback (opening signal loss or deviation exceeds ±3%), unit trip, and cold brine pump trip. The override logic is set so that when the unit trips or the cold brine pump trips, the control valve override is closed to 0% to ensure system safety. Meanwhile, the regulating valve needs to coordinate with the salt-side inlet regulating valve during the adjustment process. The salt-side inlet regulating valve of the main steam heat exchanger takes the salt-side outlet temperature as the controlled variable (the set value is manually set, the range is 280℃-320℃, and the inertia is 3s). The feedforward control adopts a function of the steam-side inlet regulating valve of the main steam heat exchanger. The opening of the salt-side regulating valve is adjusted according to the change of the steam-side regulating valve opening. For example, when the steam-side regulating valve opening increases by 10%, the salt-side regulating valve opening increases by 2% feedforward to ensure the compatibility between salt-side heat exchange and steam-side extraction, and maintain the stability of the liquid level and temperature in the molten salt storage tank.

[0043] Step 230: Adjust the salt side inlet valve opening of each of the four extraction heat exchangers, the reheat heat exchanger, and the main steam heat exchanger according to their respective salt side outlet temperatures and steam side inlet valve openings.

[0044] The core objective of adjusting the salt-side inlet valves of each heat exchanger (fourth-extraction superheater, hot reheater superheater, and main steam superheater) is to precisely control the molten salt inflow to match the heat exchange demand under the corresponding steam-side inlet valve opening, thereby maintaining a stable salt-side outlet temperature for each heat exchanger and ensuring that the liquid level and temperature of the high-temperature molten salt tank are within a reasonable range. The setpoint range for the salt-side outlet temperature of the fourth-extraction superheater is 290℃-310℃, the setpoint range for the hot reheater superheater is 300℃-320℃, and the setpoint range for the main steam superheater is 310℃-330℃. These setpoints can be fine-tuned in real time according to the temperature requirements of the molten salt storage tank and the external steam supply parameters, with a fine-tuning step of 1℃ to ensure adjustment accuracy.

[0045] The controlled variable is the salt-side outlet temperature of each heat exchanger, which is acquired in real time by temperature sensors installed on the salt-side outlet pipes at a frequency of 1Hz and a data accuracy of ±0.5℃. A 3-second inertial filter is also implemented to eliminate the interference of instantaneous temperature fluctuations on the control logic, ensuring the stability and reliability of the controlled variable data. For example, after the temperature sensor at the salt-side outlet of the four-extraction superheated heat exchanger acquires the temperature data in real time, it undergoes a 3-second inertial filter to remove temperature spikes or troughs caused by sudden interference, outputting a smooth temperature detection value as the feedback signal for the control logic.

[0046] The feedforward control logic uses the opening degree of the steam-side inlet valve of the corresponding heat exchanger as the core input, constructing a correlation function between the valve opening degree and the salt-side inlet valve opening degree to achieve an early response of the salt-side valve when the steam-side operating conditions change. Specifically, the feedforward control of the salt-side inlet valve of the four-extraction superheater adopts a linear function of the steam-side inlet valve opening degree, with the function expression: FF4=k4×S4+b4, where FF4 is the feedforward signal of the salt-side valve of the four-extraction heat exchanger, S4 is the opening degree of the steam-side inlet valve of the four-extraction heat exchanger (0%-100%), k4 is the proportional coefficient (calibrated to a value of 0.3), and b4 is the offset (value of 5%). The feedforward function of the salt-side inlet valve of the hot reheat superheater is: FF4. re =k re ×S re +b re , of which FF re For the feedforward signal of the hot resalt side modulation gate, S re For the opening of the hot reheat steam side inlet regulating valve, k re b is the proportionality constant (value 0.35). re The offset (value is 4%). The feedforward function for the salt-side inlet control valve of the main steam superheater is: FF main =k main ×S main +b main , of which FF main Main steam salt side regulating valve feedforward signal, S mainMain steam side inlet valve opening, k main b is the proportionality constant (value 0.4). main This is the offset (value 3%). Each feedforward signal is set with a limit (0%-10%) to avoid excessive feedforward adjustment leading to large fluctuations in the salt-side outlet temperature. At the same time, a reasonable feedforward signal change rate (≤2% / s) is set to ensure the coordination between feedforward adjustment and changes in the steam-side regulating valve opening.

[0047] The regulation signal generation adopts a proportional-integral (PI) control algorithm, combining the deviation between the controlled variable and the setpoint, and the feedforward signal. The calculation formula is: U = Kp × ΔT + Ki × ∫ΔTdt + FF, where U is the salt-side inlet valve opening regulation signal (0%-100%), and ΔT is the deviation between the controlled variable and the setpoint (ΔT = T). act -T set T act T represents the actual temperature at the salt-side outlet. set (These are setpoints), where Kp is the proportional coefficient, Ki is the integral coefficient, and FF is the feedforward signal. The PI parameters of the salt-side control valves for each heat exchanger are determined after calibration under actual operating conditions: Kp = 1.2, Ki = 0.2 for the salt-side control valve of the fourth extraction superheater; Kp = 1.3, Ki = 0.25 for the salt-side control valve of the hot reheat superheater; and Kp = 1.4, Ki = 0.3 for the salt-side control valve of the main steam superheater. For example, when the actual outlet temperature T of the salt-side control valve of the fourth extraction superheater... act =295℃, set value T set =300℃, ΔT=-5℃, the opening of the four extraction steam side inlet regulating valve S4=50%, then the feedforward signal FF4=0.3×50%+5%=20%, the regulating signal U=1.2×(-5)+0.2×∫(-5)dt+20%, after calculation, the corresponding regulating valve opening command is output to drive the salt side inlet regulating valve to increase the opening, increase the molten salt inflow to raise the outlet temperature to the set value.

[0048] Each heat exchanger salt-side inlet control valve is configured with a unified manual switching condition. The valve automatically switches to manual control mode when any of the following conditions are met: poor quality of the controlled variable (temperature data deviation from the temperature sensor exceeds ±2℃, or no valid data for 5 consecutive seconds); large command feedback deviation (deviation between the control signal and the actual valve opening exceeds ±5%, and lasts for 3 seconds); poor valve feedback (valve opening sensor signal lost, or opening data deviation exceeds ±3%); unit trip; cold salt pump trip. Simultaneously, an override logic is set. When the unit trips or the cold salt pump trips, the override signal triggers the salt-side inlet control valve to quickly close to 0%, cutting off the molten salt inflow and preventing continuous heating of the molten salt during steam-free side heat exchange, thus avoiding equipment overheating and ensuring system safety.

[0049] The operating rate of the salt-side inlet control valves for each heat exchanger is set to ≤3% / s to prevent frequent starts and stops or rapid actions that could cause drastic fluctuations in molten salt flow and affect the stability of the molten salt storage tank level. For example, when adjusting the salt-side inlet control valve of the fourth-extraction superheater from 30% to 50% opening, it operates smoothly at a rate of 3% / s, completing the adjustment in approximately 6.7 seconds. This ensures a gradual change in molten salt flow, precisely matching the heat exchange requirements of the steam side. Simultaneously, the salt-side control valves coordinate with the steam-side control valves. When the steam-side inlet control valve opening increases, the salt-side control valve increases its opening in advance via a feedforward signal; conversely, when the steam-side inlet control valve opening decreases, the salt-side control valve decreases its opening synchronously. This avoids significant temperature fluctuations caused by heat exchange mismatch, ultimately achieving stable control of the salt-side outlet temperature of each heat exchanger and ensuring stable molten salt storage tank level and temperature.

[0050] Step 240: Adjust the steam supply of the steam generation system according to the opening of the steam-side inlet valve of the four-extraction heat exchanger and the steam-side inlet valve of the reheat heat exchanger.

[0051] As the core equipment for supplementing the steam supply of the molten salt exothermic system, the steam generation system adjusts its steam supply in real time based on the opening changes of the steam-side inlet valves of the four-extraction heat exchanger and the hot reheat heat exchanger, while selecting the corresponding control mode according to its own steam supply flow rate. The control modes are divided into "outlet valve flow rate adjustment mode" and "frequency converter flow rate adjustment - outlet valve pressure adjustment mode," with automatic switching based on preset conditions. The switching conditions include three items: First, the steam generator's steam supply flow rate > a set threshold (this threshold is determined based on the low-load adjustment capability of the hot salt pump frequency converter, for example, set to 20t / h, which can be fine-tuned according to the actual steam supply demand of the unit), and this state is maintained for a 60s delay to ensure flow stability before switching; second, the hot salt pump frequency converter frequency > a set threshold (for example, set to 30Hz to match the frequency converter's stable low-load operating range); and third, the steam generator's steam supply flow signal is not faulty (i.e., the data deviation collected by the flow sensor is ≤ ±0.5t / h, and there are no abnormalities after 5 seconds of continuous collection). When all three conditions are met, the system automatically switches to "inverter flow regulation - outlet valve pressure regulation mode"; if any condition is not met, it switches to "outlet valve flow regulation mode" to ensure that the control mode is precisely matched with the steam supply conditions.

[0052] In the "inverter flow rate regulation - outlet valve pressure regulation mode" approach, the steam supply adjustment is achieved using the hot salt pump inverter as the core actuator, while the outlet valve focuses on stabilizing the steam supply header pressure. In the control logic of the hot salt pump inverter, the setpoint is the total external steam supply flow rate demand, determined comprehensively based on the pressure demand of the steam supply header and the opening of the four extraction and hot reheat valves. The setpoint range is 10t / h-100t / h (adjustable according to the system design steam supply capacity), and allows for a manual offset of ±5t / h. The controlled variable is the total external steam supply flow rate, which is collected in real-time by a flow sensor installed at the steam supply header outlet and subjected to 3-second inertial filtering to eliminate the interference of instantaneous flow fluctuations on the adjustment logic. The feedforward control uses a linear function of the total external steam supply flow rate demand setting, with the function expression being FF. freq =k freq ×Q req +b freq , of which FF freq Q is the feedforward signal for the frequency converter. req To set the total flow demand for external steam supply, k freq b is the proportionality coefficient (calibrated to a value of 0.2). freq The offset (valued at 5Hz) is used, and the feedforward signal also undergoes a 3-second inertial filter to ensure consistency with the response characteristics of the controlled variable. The inverter's adjustment signal is generated using a proportional-integral (PI) control algorithm, calculated as: F = Kp freq ×ΔQ+Ki freq ×∫ΔQdt+FF freq Where F is the inverter output frequency (range 20Hz-50Hz), and ΔQ is the deviation between the controlled variable and the set value (ΔQ = Q). act -Q req Q act (actual total steam supply flow), Kp freq Ki is the proportionality coefficient (value 1.5). freq This is the integral coefficient (value 0.4). When the following occurs: hot salt pump trips, poor quality of the controlled variable (flow signal deviation exceeds ±0.5t / h or no valid data for 5 consecutive seconds), large command feedback deviation (inverter output frequency deviation exceeds ±2Hz and lasts for 3 seconds), poor inverter feedback quality (frequency signal loss or deviation exceeds ±1Hz), unit trips, or the system exits the "inverter flow control - outlet valve voltage regulation mode", the inverter automatically switches to manual control mode to ensure system safety.

[0053] Under the same control mode, the control valve from the steam generation system to the steam supply header focuses on the pressure control of the steam supply header. The valve setpoint is the external steam supply demand pressure plus a manual offset. The external steam supply demand pressure is determined based on the user's steam supply command (e.g., set to 1.0 MPa), and the manual offset range is ±0.1 MPa. The overall upper and lower limits of the setpoint are set to 0.8 MPa-1.2 MPa. The controlled variable is the external steam supply header pressure, which is acquired in real time by a pressure sensor and processed by 3-second inertial filtering. The valve's adjustment signal is generated using a proportional-integral control algorithm, and the calculation formula is: U valve =Kp press ×ΔP+Ki press ×∫ΔPdt, where U valve The valve opening adjustment signal is 0%-100%, ΔP is the deviation between the actual pressure in the steam header and the set value, and Kp is the valve opening adjustment signal. press Ki is the proportionality constant (value 1.2). press This is the integral coefficient (value 0.3). The conditions for switching the control valve to manual mode include: hot salt pump tripping, poor quality of the controlled variable (pressure signal deviation exceeding ±0.05MPa), large command feedback deviation (deviation between the control signal and the actual valve opening exceeding ±5% for 3 seconds), poor valve feedback quality (loss of opening signal or deviation exceeding ±3%), unit tripping, or system switching to "outlet control valve flow rate control mode" to ensure the reliability of control valve control.

[0054] Under the "outlet valve flow rate regulation mode," the steam supply adjustment is entirely handled by the control valves from the steam generation system to the steam supply header. The valve setpoint is consistent with the inverter setpoint in the "frequency converter flow rate regulation - outlet valve pressure regulation mode," i.e., the total external steam supply flow rate demand setting (range 10t / h-100t / h), allowing for a manual offset of ±5t / h. The regulated quantity is also the total external steam supply flow rate, and the acquisition method and filtering processing are the same as described above. The feedforward control incorporates three inputs: one is a linear function of the total external steam supply flow rate demand setting (same as FF). freq The functional form, only the proportionality constant k valve Value 0.3, offset b valve The value is 3%); secondly, the hot re-extraction steam control valve related function, expressed as FF. re =k re ×S re , of which FF re For the thermal readjustment gate feedforward signal, S re For the steam-side inlet regulating valve opening of the heat reheat heat exchanger, k reThe first is the proportional coefficient (value 0.15); the second is the related function of the fourth extraction steam control valve, expressed as FF4 = k4 × S4, where FF4 is the feedforward signal of the fourth extraction control valve, S4 is the opening degree of the steam-side inlet control valve of the fourth extraction heat exchanger, and k4 is the proportional coefficient (value 0.12). A limit (0%-8%) is set for the sum of the feedforward signals to avoid over-adjustment. The control valve's adjustment signal is generated using a proportional-integral (PI) control algorithm, calculated as: U valveflow =Kp flow ×ΔQ+Ki flow ×∫ΔQdt+FF total U valveflow For the valve opening adjustment signal (0%-100%), FF total Kp is the sum of the three feedforward signals. flow Ki is the scaling factor (value 1.8). flow This is the integral coefficient (value 0.5). The manual switching conditions for the control valve are the same as those under "Variable Frequency Drive Flow Rate Adjustment - Outlet Control Valve Voltage Adjustment Mode", with the addition of the "Variable Frequency Drive Flow Rate Adjustment - Outlet Control Valve Voltage Adjustment Mode" condition to ensure a smooth transition of the control valve state when switching control modes.

[0055] During steam supply adjustment, changes in the opening of the steam-side inlet control valves of the fourth extraction heat exchanger and the hot reheat heat exchanger are transmitted to the steam generation system in real time via feedforward control, enabling rapid response for steam supply replenishment. For example, when the opening of the fourth extraction control valve increases from 40% to 60% (corresponding to an increase in the steam supply of the fourth extraction), while the opening of the hot reheat control valve remains constant at 50%, the feedforward function of the fourth extraction control valve is FF4 = 0.12 × (60% - 40%) = 2.4%, and the feedforward function of the hot reheat control valve is FF... re =0.15 × 50% = 7.5%, with the total flow demand set as a feedforward signal, the control valve (or frequency converter) adjusts its output in advance to avoid large fluctuations in the pressure or flow of the steam supply header. At the same time, the operating rate of all regulating components is limited: the frequency change rate of the hot salt pump frequency converter is ≤1Hz / s, and the valve opening change rate is ≤3% / s. This prevents frequent operation or rapid response of components from causing system instability, ultimately achieving precise compensation of the steam generation system for changes in the fourth extraction and hot reheat steam supply, ensuring the stability and continuity of external steam supply.

[0056] Based on the core control logic of the molten salt exothermic system implemented in steps 210 to 240 above, considering that the four extraction steam needs to simultaneously meet the dual needs of external steam supply from the steam supply header and steam consumption by the feedwater pump (small turbine), the pressure difference between the two types of steam consumption and the load fluctuation of the extraction steam unit can easily lead to an imbalance in the extraction steam distribution, thereby affecting the overall operational stability of the system, this application also provides an extended scheme that includes four extraction steam distribution balance control. Figure 3The flowchart illustrates another control method for a molten salt exothermic system provided in this application. Based on the core control process described above, this method adds a dynamic distribution and adjustment step for the extraction steam between the steam supply header and the feedwater pump. This is achieved through the following steps:

[0057] Step 310: Adjust the opening of the adjustable rotating baffle according to the steam pressure requirements of the feedwater pump and the opening of the steam side inlet regulating valve of the four-extraction heat exchanger.

[0058] The extraction steam from the fourth extraction turbine needs to simultaneously meet the dual demands of external steam supply from the steam supply header and steam consumption by the feedwater pumps (small turbines). Differences in pressure requirements between these two needs, along with load fluctuations in the extraction turbine units, can lead to an imbalance in steam distribution. Therefore, the distribution balance benchmark for the fourth extraction turbine is first determined based on the steam pressure requirements of the feedwater pumps, the pressure requirements of the steam supply header, and the operating load of the extraction turbine units. The steam pressure requirements of the feedwater pumps are set based on equipment design parameters, ranging from 0.8MPa to 1.2MPa, and can be adjusted manually by ±0.05MPa. The pressure requirements of the steam supply header are determined based on external steam supply commands, ranging from 0.9MPa to 1.3MPa, and also support manual offsets of ±0.05MPa. The load of the extraction turbine units is divided into low-load (0-30% rated load), medium-load (30%-70% rated load), and high-load (70%-100% rated load) ranges according to rated capacity. The distribution balance benchmark is obtained through weighted calculation, using the formula: B = k1 × P pumpreq +k2×P headerreq +k3×P load Where B is the allocation balance benchmark (range 0.3-0.7, corresponding to the proportion coefficient of steam extracted from the fourth extraction pump in the steam used by the feedwater pump), P pumpreq For the normalized value of steam pressure demand for the feedwater pump (mapping 0.8MPa-1.2MPa to the 0-1 interval), P headerreq To provide a normalized value for the pressure demand of the steam header (mapping 0.9MPa-1.3MPa to the 0-1 range), P load The normalized value of the unit load (mapping 0-100% of the rated load to the 0-1 range), k1, k2, and k3 are weighting coefficients (calibrated under actual operating conditions, k1=0.4, k2=0.3, k3=0.3 at low load; k1=0.35, k2=0.35, k3=0.3 at medium load; k1=0.3, k2=0.4, k3=0.3 at high load). For example, under low load conditions, the steam pressure requirement for the feedwater pump is 1.0 MPa (normalized value 0.5), the steam supply header pressure requirement is 1.1 MPa (normalized value 0.5), and the unit load is 20% (normalized value 0.2). Then B = 0.4 × 0.5 + 0.3 × 0.5 + 0.3 × 0.2 = 0.41, indicating that 41% of the steam extracted from the fourth extraction unit needs to be allocated to the feedwater pump, and the remaining 59% is allocated to the steam supply header.

[0059] Based on the correspondence between the steam-side inlet regulating valve opening and the steam extraction volume of the four-extraction heat exchanger, and combined with the above-mentioned distribution balance benchmark, the target opening of the adjustable rotating baffle is determined. A linear correlation model between the steam-side inlet regulating valve opening and the total steam extraction volume of the four-extraction heat exchanger is established through experimental testing: Q total = a×S4+b, where Q total S4 represents the total extraction steam volume of the fourth extraction unit (t / h), S4 represents the opening degree of the steam-side inlet regulating valve of the fourth extraction heat exchanger (0%-100%), a is the proportional coefficient (calibrated to 2.5t / h / %), and b is the base extraction steam volume (valued at 10t / h). Based on the distribution balance benchmark B, the target steam consumption Q of the feedwater pump can be calculated. pumptarget =Q total ×B, Target steam supply Q of the steam supply manifold headertarget =Q total ×(1-B). The opening degree of the adjustable rotating baffle is positively correlated with the steam consumption of the feedwater pump. By collecting feedwater pump steam consumption data under different baffle opening degrees, a target opening degree calculation model is fitted and obtained: S target =c×Q pumptarget +d, where S target For the target opening degree (0%-100%) of the adjustable rotating baffle, c is the proportional coefficient (calibrated to 0.03% / t / h), and d is the base opening degree (5%). For example, if the steam-side inlet regulating valve opening S4 of the four-extraction heat exchanger is 40%, then Q total =2.5×40+10=110t / h, if the distribution balance benchmark B=0.41, Q pumptarget =110×0.41=45.1t / h, and then S is calculated. target =0.03×45.1+5≈18.53%. Meanwhile, to accommodate the rotating baffle's characteristic of "avoiding frequent movements," a reasonable rate of change limit (≤0.5% / s) is set for the target opening to ensure smooth adjustment.

[0060] The real-time steam pressure P of the feedwater pump is collected by a pressure sensor. pumpact and the real-time steam supply pressure P of the steam supply header headeract The pressure deviation ΔP is obtained by comparing it with the respective demand pressures. pump =P pumpact -P pumpreq Steam supply pressure deviation ΔP header =P headeract -P headerreq Combined with the real-time opening S4 of the steam-side inlet regulating valve of the four-extraction heat exchanger. act The initial adjustment signal for the adjustable rotating baffle is generated using a proportional-integral (PI) control algorithm, and the calculation formula is: S initial =Kp1×ΔP pump+Ki1×∫ΔP pump dt+Kp2×ΔP header +Ki2×∫ΔP header dt+K3×S4 act S initial For the initial adjustment signal (0%-100%), Kp1 and Ki1 are PI parameters for the steam pressure deviation (values ​​1.0 and 0.2), Kp2 and Ki2 are PI parameters for the steam supply pressure deviation (values ​​0.8 and 0.15), and K3 is the valve opening correlation coefficient (value 0.1). For example, ΔP pump =0.03MPa, ΔP header = -0.02MPa, S4act = 40%, then S initial =1.0×0.03+0.2×∫0.03dt+0.8×(-0.02)+0.15×∫(-0.02)dt+0.1×40, and output the initial adjustment signal after calculation.

[0061] Based on the constraint of the total extraction volume of the four extraction steam sources, the initial control signal is adjusted so that the opening degree corresponding to the adjusted control signal approaches the target opening degree S. target The constraint condition for the total steam extraction volume of the four extraction methods is set as Q. total The fluctuation range is ≤ ±5%, meaning that the sum of the steam consumption of the feedwater pump and the steam supply of the steam header corresponding to the adjusted diaphragm opening must be maintained within Q. total Within the range of ×(1±5%). The adjustment algorithm uses closed-loop feedback correction: S adjust =S initial +K corr ×(S target -S initial ), where S adjust For the adjusted control signal, K corr A correction coefficient (valued at 0.6 to ensure a smooth adjustment process approaching the target value) is used. Simultaneously, to match the control logic of the rotating partition, upper, target, and lower limits for the opening are set, satisfying the condition that upper limit > target value > lower limit (e.g., upper limit = S). target +5%, lower limit = S target -5%). After automatic control is activated, when the real-time steam pressure P of the feedwater pump... pumpact Pressure greater than the upper limit (P) pumpreq When the pressure is +0.05MPa, the rotary baffle adjustment mechanism opens at a rate of 0.5% / s to reduce the steam pressure until P... pumpact With P pumpreq Adjustment should stop when the deviation is within 0.05 MPa; when P pumpact Less than the lower limit pressure (P) pumpreq-When the pressure is 0.05 MPa, the rotating baffle adjustment mechanism closes at a rate of 0.5% / s, increasing the steam pressure until the deviation is within 0.05 MPa, at which point the adjustment stops.

[0062] The manual switching condition of the adjustable rotating baffle is coordinated with other control valves in the four-extraction system. When the quality of the controlled quantity is poor (the deviation of the steam pressure of the feedwater pump or the pressure signal of the steam supply header exceeds ±0.05MPa, or there is no valid data for 5 consecutive seconds), the command feedback deviation is large (the deviation between the adjusted control signal and the actual opening of the baffle exceeds ±3% and lasts for 3 seconds), the baffle feedback is poor (the opening signal is lost or the deviation exceeds ±2%), the unit trips, or the steam-side inlet control valve of the four-extraction heat exchanger switches to manual mode, the rotating baffle automatically switches to manual control mode. At the same time, the opening adjustment of the rotating baffle is linked with the action of the steam-side inlet control valve of the four-extraction heat exchanger. When the opening of the four-extraction control valve increases, resulting in an increase in the total steam extraction, the baffle is adjusted synchronously according to the target opening model to ensure that the distribution ratio of steam consumption of the feedwater pump and steam supply of the steam supply header always fits the balance benchmark. Ultimately, this achieves dynamic distribution balance of steam extraction between the four-extraction system and its dual purpose, ensuring stable operation of the feedwater pump and the quality of external steam supply.

[0063] Furthermore, as a response to the above Figure 2 The implementation of the method embodiment shown in this application provides a control device for a molten salt exothermic system. The embodiment of this device corresponds to the foregoing method embodiment. For ease of reading, this embodiment will not repeat the details of the foregoing method embodiment, but it should be understood that the device in this embodiment can correspondingly implement all the contents of the foregoing method embodiment. Specifically, as shown... Figure 4 As shown, the control device 400 of the molten salt exothermic system includes:

[0064] The first regulating module 410 is used to coordinately regulate the opening of the steam-side inlet regulating valve of the four-extraction heat exchanger and the steam-side inlet regulating valve of the hot reheat heat exchanger according to the pressure demand of the steam supply header and the steam pressure response characteristics of the four-extraction heat exchanger and the hot reheat heat exchanger.

[0065] The second adjustment module 420 is used to adjust the opening of the main steam heat exchanger steam side inlet valve according to the steam turbine inlet thrust balance requirements, the extraction steam flow characteristics related to the steam side inlet valve opening of the heat reheat heat exchanger, and the extraction steam unit load.

[0066] The third adjustment module 430 is used to adjust the opening of the salt side inlet valve of each of the four extraction heat exchangers, the hot reheat heat exchanger, and the main steam heat exchanger according to their respective salt side outlet temperature and steam side inlet valve opening, so as to maintain the stability of the liquid level and temperature of the molten salt storage tank.

[0067] The fourth regulating module 440 is used to adjust the steam supply of the steam generation system according to the opening of the steam-side inlet regulating valve of the four extraction heat exchanger and the steam-side inlet regulating valve of the reheat heat exchanger, so as to realize steam supply replenishment.

[0068] Furthermore, such as Figure 4 As shown, the first regulating module 410 is specifically used to determine the total extraction steam demand of the fourth extraction heat exchanger and the hot reheat heat exchanger based on the pressure demand of the steam supply header and the operating load of the extraction steam unit; allocate the extraction steam share of the fourth extraction heat exchanger and the hot reheat heat exchanger based on the difference in pressure response characteristics between the fourth extraction steam and the hot reheat steam and the total extraction steam demand; generate initial regulating signals corresponding to the steam side inlet valves of the fourth extraction heat exchanger and the hot reheat heat exchanger based on the deviation between the collected steam side outlet pressure of the fourth extraction heat exchanger, the steam side outlet pressure of the hot reheat heat exchanger and the target pressure corresponding to the extraction steam share; generate a coordination matrix based on the interaction influence law between the steam flow rate of the fourth extraction heat exchanger and the hot reheat steam flow rate, and perform decoupling calculation on the initial regulating signals according to the coordination matrix to eliminate the interaction interference in the regulation process of the steam side inlet valves of the fourth extraction heat exchanger and the hot reheat heat exchanger.

[0069] Furthermore, such as Figure 4 As shown, the first adjustment module 410 is specifically used to determine the weighting coefficient of each load interval based on the pressure response characteristics of the steam supply header within each load interval of the extraction steam unit; generate load gradient correlation parameters by combining historical matching data of the extraction steam flow rate of the fourth extraction unit and the hot re-extraction steam flow rate within each load interval; generate load adaptation parameters by performing linear interpolation within the interval according to the load interval to which the current load of the extraction steam unit belongs and the corresponding load gradient correlation parameters; determine the target pressure for real-time dynamic adjustment with the load of the extraction steam unit based on the pressure demand of the steam supply header, the load adaptation parameters, and the nonlinear correlation between the pressure demand and the load adaptation parameters; and allocate the extraction steam share of the fourth extraction heat exchanger and the hot re-extraction heat exchanger based on the target pressure and the total extraction steam demand.

[0070] Furthermore, such as Figure 4 As shown, the second adjustment module 420 is specifically used to determine the target extraction steam flow rate of the main steam heat exchanger based on the turbine inlet steam thrust balance requirements, the steam side extraction steam flow rate change trend of the heat reheat heat exchanger, and the extraction steam unit load; to collect the actual extraction steam flow rate of the main steam heat exchanger steam side and compare it with the target extraction steam flow rate to obtain the flow deviation; and to generate an opening adjustment signal for the main steam heat exchanger steam side inlet valve based on the flow deviation.

[0071] Furthermore, such as Figure 4As shown, the second adjustment module 420 is specifically used to divide the thrust balance operating condition intervals according to the turbine inlet steam thrust balance requirements, the trend of steam flow rate variation on the steam side of the hot reheat heat exchanger, and the load of the extraction steam unit; determine the thrust adjustment benchmark coefficient for each thrust balance operating condition interval based on the variation amplitude of hot reheat extraction steam flow rate, historical thrust deviation data, and main steam extraction steam flow rate compensation efficiency within each thrust balance operating condition interval; collect the real-time monitoring value of turbine inlet steam thrust and compare it with the turbine inlet steam thrust balance requirements to obtain the thrust deviation; and determine the target extraction steam flow rate of the main steam heat exchanger based on the current steam side extraction steam flow rate of the hot reheat heat exchanger, the thrust adjustment benchmark coefficient of the corresponding thrust balance operating condition interval, and the thrust deviation.

[0072] Furthermore, such as Figure 4 As shown, the control device 400 of the molten salt exothermic system also includes a fifth adjustment module 450, which is used to adjust the opening of the adjustable rotating baffle according to the steam pressure demand of the feedwater pump and the opening of the steam side inlet regulating valve of the fourth extraction heat exchanger, so as to realize the distribution balance of the fourth extraction steam between the steam supply of the steam supply header and the steam consumption of the feedwater pump.

[0073] Furthermore, such as Figure 4 As shown, the fifth adjustment module 450 is specifically used to determine the distribution balance benchmark for the extraction steam of the fourth extraction unit based on the steam pressure demand of the feedwater pump, the pressure demand of the steam supply header, and the operating load of the extraction steam unit; based on the correspondence between the opening of the steam-side inlet regulating valve of the fourth extraction heat exchanger and the extraction steam volume, and combined with the distribution balance benchmark, determine the target opening of the adjustable rotating baffle; collect the real-time steam pressure of the feedwater pump and the real-time steam supply pressure of the steam supply header, and compare them with their respective demand pressures to obtain the steam pressure deviation and the steam supply pressure deviation; generate the initial adjustment signal for the adjustable rotating baffle based on the steam pressure deviation, the steam supply pressure deviation, and the real-time opening of the steam-side inlet regulating valve of the fourth extraction heat exchanger; and adjust the initial adjustment signal based on the constraint of the total extraction steam volume of the fourth extraction unit, so that the opening corresponding to the adjusted adjustment signal approaches the target opening.

[0074] Optionally, the control device for the molten salt exothermic system may be an electronic device with data processing capabilities, or a functional module within the electronic device, without limitation.

[0075] For example, the electronic device can be a server, which can be a single server or a server cluster consisting of multiple servers. As another example, the electronic device can be a mobile phone, tablet computer, desktop computer, laptop computer, handheld computer, notebook computer, ultra-mobile personal computer (UMPC), netbook, as well as cellular phones, personal digital assistants (PDAs), augmented reality (AR) devices, virtual reality (VR) devices, and other terminal devices. As yet another example, the electronic device can also be a recording device, video surveillance equipment, etc. This application does not impose any special limitations on the specific form of the electronic device.

[0076] The following example uses electronic equipment as the control device for a molten salt exothermic system. Figure 5 As shown, Figure 5 The hardware structure of an electronic device 500 provided in this application.

[0077] like Figure 5 As shown, the electronic device 500 includes a processor 510, a communication line 520, and a communication interface 530.

[0078] Optionally, the electronic device 500 may also include a memory 540. The processor 510, memory 540, and communication interface 530 can be connected via a communication line 520.

[0079] The processor 510 can be a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 510 can also be any other device with processing capabilities, such as a circuit, device, or software module, without limitation.

[0080] In one example, processor 510 may include one or more CPUs, for example Figure 5 CPU0 and CPU1 in the CPU.

[0081] As an optional implementation, the electronic device 500 may include multiple processors; for example, in addition to processor 510, it may also include processor 570. A communication line 520 is used to transmit information between the components included in the electronic device 500.

[0082] Communication interface 530 is used for communication with other devices or other communication networks. These other communication networks can be Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc. Communication interface 530 can be a module, circuit, transceiver, or any device capable of enabling communication.

[0083] Memory 540 is used to store instructions. These instructions can be computer programs.

[0084] The memory 540 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and / or instructions; it may also be a random access memory (RAM) or other type of dynamic storage device capable of storing information and / or instructions; it may also be an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, etc., without limitation.

[0085] It should be noted that the memory 540 can exist independently of the processor 510, or it can be integrated with the processor 510. The memory 540 can be used to store instructions, program code, or some data, etc. The memory 540 can be located inside or outside the electronic device 500, without restriction.

[0086] The processor 510 is configured to execute instructions stored in the memory 540 to implement the communication method provided in the following embodiments of this application. For example, when the electronic device 500 is a terminal or a chip in a terminal, the processor 510 can execute instructions stored in the memory 540 to implement the steps performed by the sending end in the following embodiments of this application.

[0087] As an optional implementation, the electronic device 500 also includes an output device 550 and an input device 560. The output device 550 can be a display screen, speaker, or other device capable of outputting data from the electronic device 500 to the user. The input device 560 can be a keyboard, mouse, microphone, joystick, or other device capable of inputting data into the electronic device 500.

[0088] It should be pointed out that, Figure 5 The structure shown does not constitute a limitation on the electronic device, except... Figure 5 In addition to the components shown, the electronic device may include more or fewer components than illustrated, or combine certain components, or have different component arrangements.

[0089] The control device and application scenarios of the molten salt exothermic system described in this application are for the purpose of more clearly illustrating the technical solutions of this application, and do not constitute a limitation on the technical solutions provided in this application. As those skilled in the art will know, with the evolution of the control device of the molten salt exothermic system and the emergence of new business scenarios, the technical solutions provided in this application are also applicable to similar technical problems.

[0090] This application provides a storage medium storing a program that, when executed by a processor, implements a control method for the molten salt exothermic system.

[0091] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A control method for a molten salt exothermic system, characterized in that, The method includes: Based on the pressure requirements of the steam supply header and the steam pressure response characteristics of the four extraction heat exchangers and the hot reheat heat exchangers, the opening of the steam-side inlet valves of the four extraction heat exchangers and the hot reheat heat exchangers is adjusted in a coordinated manner. Adjust the opening of the steam-side inlet valve of the main steam heat exchanger according to the steam turbine inlet thrust balance requirement, the extraction steam flow characteristics associated with the steam-side inlet valve opening of the heat reheat heat exchanger, and the extraction steam unit load. Based on the salt-side outlet temperature and steam-side inlet valve opening of the four extraction heat exchangers, the heat reheat heat exchangers, and the main steam heat exchangers, the opening of the salt-side inlet valves of each heat exchanger is adjusted to maintain the stability of the molten salt storage tank level and temperature. The steam supply of the steam generation system is adjusted according to the opening degree of the steam-side inlet regulating valve of the four extraction heat exchanger and the steam-side inlet regulating valve of the reheat heat exchanger to achieve steam supply replenishment.

2. The method according to claim 1, characterized in that, Based on the pressure requirements of the steam supply header and the extraction steam pressure response characteristics of the four extraction heat exchangers and the hot reheat heat exchangers, the openings of the steam-side inlet valves of the four extraction heat exchangers and the hot reheat heat exchangers are coordinated and adjusted, including: The total extraction steam demand of the four extraction heat exchangers and the heat reheat heat exchangers is determined based on the pressure requirements of the steam supply header and the operating load of the extraction steam unit. Based on the difference in pressure response characteristics between the four-extraction steam and the hot re-extraction steam, and the total extraction steam demand, the extraction steam share of the four-extraction heat exchanger and the hot re-extraction heat exchanger is allocated. Based on the deviation between the collected steam-side outlet pressure of the four-extraction heat exchanger, the steam-side outlet pressure of the hot reheat heat exchanger and the target pressure corresponding to the extraction steam share, the initial adjustment signals corresponding to the steam-side inlet valve of the four-extraction heat exchanger and the steam-side inlet valve of the hot reheat heat exchanger are generated. Based on the interaction law between the steam flow rate of the fourth extraction heat exchanger and the steam flow rate of the hot re-extraction heat exchanger, a coordination matrix is ​​generated. The initial adjustment signal is then decoupled according to the coordination matrix to eliminate the interaction interference between the steam-side inlet valve of the fourth extraction heat exchanger and the steam-side inlet valve of the hot re-extraction heat exchanger during the adjustment process.

3. The method according to claim 2, characterized in that, Based on the difference in pressure response characteristics between the four-extraction steam and the hot re-extraction steam, and the total extraction steam demand, the extraction steam share of the four-extraction heat exchanger and the hot re-extraction heat exchanger is allocated, including: The weighting coefficients for each load range are determined based on the pressure response characteristics of the steam supply header within each load range of the extraction steam unit. The load gradient correlation parameters are generated by combining the historical matching data of the extraction steam flow rate of the fourth extraction unit and the hot re-extraction steam flow rate within each load range. Based on the load range to which the current load of the extraction steam unit belongs and the corresponding load gradient correlation parameters, load adaptation parameters are generated through linear interpolation within the range. Based on the pressure demand of the steam supply header, the load adaptation parameters, and the nonlinear relationship between the pressure demand and the load adaptation parameters, the target pressure is determined to be dynamically adjusted in real time according to the load of the extraction steam unit. Based on the target pressure and the total extraction steam demand, the extraction steam share of the four extraction heat exchangers and the heat reheat heat exchangers is allocated.

4. The method according to claim 1, characterized in that, Based on the turbine inlet thrust balance requirements, the extraction steam flow characteristics associated with the steam-side inlet valve opening of the heat reheat heat exchanger, and the extraction steam unit load, the opening of the main steam heat exchanger steam-side inlet valve is adjusted, including: The target extraction steam flow rate of the main steam heat exchanger is determined based on the steam turbine inlet thrust balance requirements, the steam side extraction steam flow rate variation trend of the heat reheat heat exchanger, and the extraction steam unit load. The actual steam extraction flow rate on the steam side of the main steam heat exchanger is collected and compared with the target steam extraction flow rate to obtain the flow deviation. The opening adjustment signal of the steam-side inlet valve of the main steam heat exchanger is generated based on the flow deviation.

5. The method according to claim 4, characterized in that, Based on the turbine inlet steam thrust balance requirements, the steam-side extraction steam flow rate variation trend of the heat reheat heat exchanger, and the extraction steam unit load, the target extraction steam flow rate of the main steam heat exchanger is determined, including: Based on the turbine inlet thrust balance requirements, the steam side extraction flow rate variation trend of the heat reheat heat exchanger, and the extraction unit load, the thrust balance operating condition range is divided. Based on the variation range of hot re-extraction steam flow rate, historical data of thrust deviation, and main steam extraction steam flow rate compensation efficiency within each thrust balance operating condition range, the thrust adjustment benchmark coefficient for each thrust balance operating condition range is determined. The real-time monitoring value of the steam turbine inlet thrust is collected and compared with the steam turbine inlet thrust balance requirement to obtain the thrust deviation. The target extraction steam flow rate of the main steam heat exchanger is determined based on the current steam-side extraction steam flow rate of the reheat heat exchanger, the thrust adjustment reference coefficient of the thrust balance operating condition range, and the thrust deviation.

6. The method according to any one of claims 1-5, characterized in that, The method further includes: Based on the steam pressure demand of the feedwater pump and the opening of the regulating valve at the steam side inlet of the fourth extraction heat exchanger, the opening of the adjustable rotating baffle is adjusted in a linkage manner to achieve a balanced distribution of the extracted steam between the steam supply from the fourth extraction steam generator and the steam consumption of the feedwater pump.

7. The method according to claim 6, characterized in that, Based on the steam pressure requirements of the feedwater pump and the opening of the steam-side inlet regulating valve of the four-extraction heat exchanger, the opening of the adjustable rotating baffle is adjusted in conjunction with the following: Based on the steam pressure demand of the feedwater pump, the pressure demand of the steam supply header, and the operating load of the extraction steam unit, the distribution balance benchmark for the extraction steam of the four extraction units is determined. Based on the correspondence between the opening of the steam-side inlet regulating valve of the four-extraction heat exchanger and the steam extraction volume of the four-extraction heat exchanger, and in conjunction with the aforementioned distribution balance benchmark, the target opening of the adjustable rotating baffle is determined. Collect the real-time steam pressure of the feedwater pump and the real-time steam supply pressure of the steam supply header, and compare them with their respective required pressures to obtain the steam pressure deviation and the steam supply pressure deviation. Based on the steam pressure deviation, steam supply pressure deviation, and the real-time opening of the steam-side inlet regulating valve of the four-extraction heat exchanger, an initial adjustment signal for the adjustable rotating baffle is generated. Based on the constraint of the total steam extraction volume of the four extraction methods, the initial adjustment signal is adjusted so that the opening degree corresponding to the adjusted adjustment signal approaches the target opening degree.

8. A control device for a molten salt exothermic system, characterized in that, The device includes: The first regulating module is used to coordinate the opening of the steam-side inlet regulating valve of the four extraction heat exchanger and the steam-side inlet regulating valve of the hot reheat heat exchanger according to the pressure demand of the steam supply header and the steam pressure response characteristics of the four extraction heat exchanger and the hot reheat heat exchanger. The second adjustment module is used to adjust the opening of the main steam heat exchanger steam side inlet valve according to the steam turbine inlet thrust balance requirements, the extraction steam flow characteristics related to the steam side inlet valve opening of the heat reheat heat exchanger, and the extraction steam unit load. The third adjustment module is used to adjust the opening of the salt side inlet valve of each of the four extraction heat exchangers, the hot reheat heat exchanger, and the main steam heat exchanger according to their respective salt side outlet temperature and steam side inlet valve opening, so as to maintain the stability of the liquid level and temperature of the molten salt storage tank. The fourth regulating module is used to adjust the steam supply of the steam generation system according to the opening of the steam-side inlet regulating valve of the four extraction heat exchanger and the steam-side inlet regulating valve of the reheat heat exchanger, so as to realize steam supply replenishment.

9. A storage medium, characterized in that, The storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the storage medium to perform the control method of the molten salt exothermic system as described in any one of claims 1-7.

10. An electronic device, characterized in that, The device includes at least one processor, at least one memory connected to the processor, and a bus; wherein the processor and the memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the control method of the molten salt exothermic system as described in any one of claims 1-7.

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