A saturated steam dynamic scheduling method, device, electronic equipment and medium

Abstract

The present invention provides a saturated steam dynamic scheduling method, device, electronic equipment and medium. The method obtains historical production data, current production data and current production plan, classifies the historical production data according to historical operating condition indicators and obtains steel production-saturated steam production curves under various operating conditions, obtains a time-saturated steam prediction curve based on the steel production-saturated steam production curve under the planned steel production time and the target operating condition, calculates a target time period pressure prediction value, and obtains a saturated steam flow adjustment value based on the target time period pressure prediction value and constraint conditions, and automatically adjusts the opening of a regulating valve according to the saturated steam flow adjustment value to dynamically schedule the saturated steam, thereby solving the technical problem that manual adjustment is difficult to dynamically adjust the saturated steam in a timely manner, resulting in large fluctuations in the saturated steam flow of a saturated steam power generation system.

Description

Technical Field

[0001] The present invention relates to the field of steel smelting, and in particular to a saturated steam dynamic scheduling method, device, electronic equipment and medium. Background Art

[0002] During the steelmaking process, a large amount of saturated steam will be generated in the steelmaking process due to waste heat recovery. Saturated steam is steam that has not been heat-treated. Reasonable use of saturated steam for power generation can effectively improve energy efficiency and reduce corporate energy costs. However, in the process of saturated steam utilization in the steelmaking process, the recovery and utilization of saturated steam are operated and managed by two departments respectively, which can easily lead to data transmission failure and poor operation coordination, thus causing unnecessary energy waste and equipment downtime.

[0003] At present, relevant technologies mainly rely on real-time data to operate the recovery and utilization of saturated steam, which easily leads to large fluctuations in pressure and flow in the saturated steam power generation system. In addition, the real-time monitoring and operation of saturated steam also brings a heavy workload to the staff. Summary of the invention

[0004] In view of the shortcomings of the prior art mentioned above, the present invention provides a saturated steam dynamic scheduling method, device, electronic equipment and medium to solve the technical problem that the above-mentioned manual adjustment is difficult to dynamically adjust the saturated steam in time, which easily leads to large fluctuations in the saturated steam flow rate of the saturated steam power generation system.

[0005] The present invention provides a saturated steam dynamic scheduling method, including obtaining historical production data, current production data and current production plan, wherein the historical production data includes historical steel production, historical saturated steam production and historical operating condition indicators, the current production data includes current operating condition indicators, and the current production plan includes planned steel production and planned steel production time. The historical production data is classified according to the historical operating condition indicators, and the historical production data under each operating condition is fitted to obtain the steel production-saturated steam production curve under each operating condition; the target operating condition and the steel production-saturated steam production curve under the target operating condition are determined by the current operating condition indicators, and the time-saturated steam prediction curve is obtained based on the planned steel production time, the planned steel production and the steel production-saturated steam production curve under the target operating condition; the target time period pressure prediction value is calculated, and the target time period pressure prediction value is determined based on the time-saturated steam prediction curve and a preset saturated steam quantity-pressure table; the saturated steam flow adjustment value is obtained based on the target time period pressure prediction value and the preset constraint condition, and the opening of the regulating valve is adjusted according to the saturated steam flow adjustment value to dynamically schedule the saturated steam.

[0006] In one embodiment of the present invention, classifying the operating conditions of the historical production data according to the historical operating condition indicators includes: clustering the historical production data to obtain multiple cluster groups; determining the operating condition type of the cluster group based on the historical operating condition indicators of the cluster group to classify the operating conditions of the historical production data.

[0007] In one embodiment of the present invention, classifying the operating conditions of the historical production data according to the historical operating condition indicators also includes: if the historical operating condition indicators in the historical production data meet the parameter range of the reference operating condition in the preset operating condition table, then determining the historical production data as the classification of the reference operating condition.

[0008] In one embodiment of the present invention, obtaining a time-saturated steam prediction curve based on the planned steel production and the steel production-saturated steam production curve under the target operating conditions includes: obtaining a saturated steam prediction according to the planned steel production and the steel production-saturated steam production curve; obtaining a time-saturated steam prediction curve based on the saturated steam prediction and the planned steel production time.

[0009] In one embodiment of the present invention, calculating the pressure prediction value for the target time period includes: obtaining the predicted amount of saturated steam at multiple times through the time-saturated steam prediction amount curve, and the target period includes the multiple times; determining the pressure prediction value for the target time period based on the predicted amount of saturated steam at the multiple times and the preset saturated steam amount-pressure table.

[0010] In one embodiment of the present invention, obtaining the saturated steam flow regulation value based on the target time period pressure prediction value and preset constraints includes: establishing a scheduling optimization model, the constraints of the scheduling optimization model include power generation equipment capacity constraints, steam consumption constraints, steam regulation speed constraints, and heat storage capacity constraints of the heat accumulator, and the optimization goal of the scheduling optimization model is that the heat storage capacity of the heat accumulator is within a preset range and the power generation equipment does not stop; based on the target time period pressure prediction value and the scheduling optimization model, obtaining the saturated steam flow regulation value.

[0011] In one embodiment of the present invention, adjusting the opening of the regulating valve according to the saturated steam flow adjustment value includes: establishing a preset opening model, determining the parameters of the preset opening model based on the historical production data, and obtaining the valve opening model; determining the corresponding valve opening based on the saturated steam flow adjustment value and the valve opening model; and adjusting the opening of the regulating valve according to the corresponding valve opening.

[0012] The present invention also provides a saturated steam dynamic scheduling device, which includes: a data acquisition module for acquiring historical production data, current production data and current production plan, the historical production data includes historical steel production, historical saturated steam production and historical operating conditions indicators, the current production data includes current operating conditions indicators, and the current production plan includes planned steel production and planned steel production time. A classification and fitting module is used to classify the historical production data according to the historical operating condition indicators, and fit the historical production data under each operating condition to obtain the steel production-saturated steam production curve under each operating condition; a steam prediction module is used to determine the target operating condition and the steel production-saturated steam production curve under the target operating condition through the current operating condition indicators, and obtain the time-saturated steam prediction curve based on the planned steel production time, planned steel production and the steel production-saturated steam production curve under the target operating condition; a pressure prediction module is used to calculate the pressure prediction value of the target time period, and the target time period pressure prediction value is determined based on the time-saturated steam prediction curve and a preset saturated steam volume-pressure table; a regulating valve module is used to obtain a saturated steam flow regulation value based on the target time period pressure prediction value and preset constraints, and adjust the opening of the regulating valve according to the saturated steam flow regulation value to dynamically schedule the saturated steam.

[0013] The present invention also provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for dynamic scheduling of saturated steam as described in any of the above embodiments is implemented.

[0014] The present invention also provides an electronic terminal, comprising a processor and a memory; the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the electronic terminal executes the saturated steam dynamic scheduling method as described in any of the above embodiments.

[0015] Beneficial effects of the present invention: A saturated steam dynamic scheduling method, device, electronic equipment and medium in the present invention, which uses the current production plan to predict the predicted amount of saturated steam, breaks through the information barrier between steelmaking production and energy power, realizes seamless connection between waste heat recovery and waste heat utilization, solves the problems of information islands and coordination difficulties between the original steelmaking production and capacity power control, realizes early prediction of saturated steam volume by combining operating condition indicators and production plans, and improves the rated stability of the steam power generation system by adjusting the valve opening in advance, solves the problem that the original real-time data control easily leads to large fluctuations in pressure and flow of the steam power generation system, and realizes automatic control by calculating the steam flow adjustment value, which greatly reduces the labor intensity of operators, ensures the real-time operation, and solves the problems of heavy workload and untimely operation of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a saturated steam dynamic scheduling system shown in an exemplary embodiment of the present invention;

[0017] Figure 2 is a flow chart of a saturated steam dynamic scheduling method shown in an exemplary embodiment of the present invention;

[0018] Figure 3 is a flow chart of saturated steam dynamic scheduling calculation according to an exemplary embodiment of the present invention;

[0019] Figure 4 is a time-saturated steam prediction curve diagram shown in an exemplary embodiment of the present invention;

[0020] Figure 5 is a target period pressure prediction value calculation logic diagram shown in an exemplary embodiment of the present invention;

[0021] Figure 6 is a heat storage prediction curve diagram showing an exemplary embodiment of the present invention;

[0022] Figure 7 is a schematic diagram of a heat storage device before and after adjustment under a working condition shown in an exemplary embodiment of the present invention;

[0023] Figure 8 It is a schematic diagram of a steam power generation device before and after adjustment under the working condition shown in an exemplary embodiment of the present invention;

[0024] Fig. 9 is a schematic diagram of a heat storage device before and after adjustment under working condition 2 shown in an exemplary embodiment of the present invention;

[0025] Fig.10 is a schematic diagram of a steam power generation device before and after adjustment under working condition 2, shown in an exemplary embodiment of the present invention;

[0026] Fig.11 is a block diagram of a saturated steam dynamic dispatching device shown in an exemplary embodiment of the present invention;

[0027] Fig.12 It is a structural diagram of a computer system of an electronic device suitable for implementing an embodiment of the present invention, shown in an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0028] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0030] In the following description, numerous details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present invention difficult to understand.

[0031] See also Figure 1 , Figure 1 1 is a schematic diagram of a saturated steam dynamic scheduling system according to an exemplary embodiment of the present invention, and the system includes a calculation unit 101, a steelmaking unit 102, a power unit 103 and a valve control unit 104. The solid arrows in the figure indicate the flow direction of the data signal, and the dotted arrows indicate the flow direction of the control signal. The calculation unit 101 is used to calculate the saturated steam prediction amount, the target period pressure prediction value and the saturated steam flow adjustment value; the steelmaking unit 102 includes converter No. 1, converter No. 2, regenerator No. 1 and regenerator No. 2; the power unit includes a cylinder, a regulating valve, a saturated steam power generation equipment and other users; the valve control unit includes a valve opening model and a valve actuator. The saturated steam dynamic scheduling system first obtains historical production data, current production data and current production plan from the steelmaking unit 102, the historical production data includes historical steel production, historical saturated steam production and historical operating indicators, the current production data includes current operating indicators, and the current production plan includes planned steel production and planned steel production time. The planned steel production time in this embodiment refers to the time when converter No. 1 and converter No. 2 plan to produce steel in a future period of time.

[0032] The historical production data are classified according to the historical operating condition indicators, and the steel production-saturated steam production curve under each operating condition is obtained by fitting the historical production data under each operating condition. The target operating condition and the steel production-saturated steam production curve under the target operating condition are determined by the current operating conditions of converter No. 1 and converter No. 2, and the time-saturated steam prediction curve is obtained based on the planned steel production time and the steel production-saturated steam production curve under the target operating condition.

[0033] The calculation unit 101 determines the target period pressure prediction value based on the time-saturated steam prediction curve and the preset saturated steam quantity-pressure table. The preset saturated steam quantity-pressure table in this implementation is preset according to the mapping relationship between the historical saturated steam quantity and pressure of converter No. 1 and converter No. 2. The calculation unit 101 obtains the saturated steam flow adjustment value based on the target period pressure prediction value and the preset constraint condition. The valve control unit 104 obtains the opening required to adjust the regulating valve according to the saturated steam flow adjustment value and the valve opening model, and the valve actuator adjusts the opening of the regulating valve to dynamically dispatch the saturated steam.

[0034] See also Figure 2 , Figure 2 is a flow chart of a saturated steam dynamic scheduling method shown in an exemplary embodiment of the present invention. The saturated steam dynamic scheduling method at least includes steps S210 to S250, which are described in detail as follows.

[0035] Step S210, obtaining historical production data, current production data and current production plan, the historical production data includes historical steel production, historical saturated steam production and historical operating conditions indicators, the current production data includes current operating conditions indicators, and the current production plan includes planned steel production and planned steel production time.

[0036] The current production data and the current production plan are obtained in real time through the data acquisition equipment, and the historical production data is obtained through the historical acquisition records. In this embodiment, the historical operating condition indicators include the historical oxygen blowing time, the historical molten iron composition and the historical scrap steel weight, etc., and the current operating condition indicators include the current oxygen blowing time, the current molten iron composition and the current scrap steel weight, etc.

[0037] Step S220, classifying the historical production data according to the historical operating condition indicators, fitting the historical production data under each operating condition to obtain the steel production-saturated steam production curve under each operating condition.

[0038] The working conditions are classified based on working condition indicators such as oxygen blowing time, molten iron composition, scrap steel weight, etc. The working condition classification methods include but are not limited to clustering. Classification can also be performed based on the change range of each historical working condition indicator parameter. For example, if the value of any parameter of the historical working condition indicator changes by more than 10%, it is considered a new working condition. The steam generation amount is fitted for different working conditions after classification. The fitting parameters are mainly the steam production per ton of steel in the converter, and then the steel production-saturated steam production curve is obtained based on the historical steel production.

[0039] In one embodiment of the present invention, production data of a certain measuring point at a certain historical moment is collected, and a piece of historical production data is obtained. The historical production data at the historical moment includes historical operating condition indicators, historical steel production, and historical saturated steam production. The historical operating condition indicators include historical oxygen blowing time, historical molten iron composition, and historical scrap steel weight. When the historical production data is classified, the operating condition classification of the piece of historical production data is determined based on the parameters of the three historical operating condition indicators, namely, historical oxygen blowing time, historical molten iron composition, and historical scrap steel weight.

[0040] In one embodiment of the present invention, if three parameters of historical oxygen blowing time, historical molten iron composition and historical scrap steel weight of a certain historical production data all meet the parameter range of operating condition one in the preset operating condition table, the operating condition classification of this historical production data is determined as operating condition one, and a fitting point of the steel production-saturated steam production curve of operating condition one is obtained based on the historical steel production and historical saturated steam production of the historical production data. Based on multiple historical production data classified as operating condition one, multiple fitting points of the steel production-saturated steam production curve of operating condition one are obtained, and the steel production-saturated steam production curve of operating condition one is obtained by fitting multiple fitting points.

[0041] In one embodiment of the present invention, classifying the operating conditions of historical production data according to historical operating condition indicators includes clustering the historical production data to obtain multiple cluster groups; determining the operating condition type of the cluster group based on the historical operating condition indicators of the cluster group to classify the operating conditions of the historical production data.

[0042] In one embodiment of the present invention, classifying the operating conditions of historical production data according to historical operating condition indicators also includes determining the historical production data as a classification of the reference operating condition if the historical operating condition indicators in the historical production data meet the parameter range of the reference operating condition in a preset operating condition table.

[0043] Step S230, determine the target operating condition and the steel production-saturated steam production curve under the target operating condition through the current operating condition indicators, and obtain the time-saturated steam prediction curve based on the planned steel production time, planned steel production and the steel production-saturated steam production curve under the target operating condition.

[0044] In one embodiment of the present invention, the current operating condition indicators include the current oxygen blowing time, the current molten iron composition and the current scrap steel weight. The various parameters of the current operating condition indicators are compared with the various parameters of the historical operating condition indicators under each operating condition, and the operating condition that is most similar to the current operating condition parameter indicators is determined as the target operating condition.

[0045] The prediction of saturated steam prediction mainly includes planned steel production, planned steel production time and the steel production-saturated steam output curve under different working conditions fitted in the previous step; the current production plan mainly refers to the converter schedule for a period of time in the future, through which the rhythm and time point of saturated steam generation in the future can be predicted; the target converter is classified according to the current production data read in real time, and the steel production-saturated steam output curve and the current production plan can be used to predict the flow of saturated steam generation in the future. The three elements of rhythm, time point and generation can form the time-saturated steam prediction curve, such as Figure 4 As shown, Figure 4 is a time-saturated steam prediction curve diagram shown in an exemplary embodiment of the present invention.

[0046] In one embodiment of the present invention, obtaining a time-saturated steam prediction curve based on the planned steel production and the steel production-saturated steam production curve under the target operating conditions includes obtaining the saturated steam prediction according to the planned steel production and the steel production-saturated steam production curve; obtaining the time-saturated steam prediction curve based on the saturated steam prediction and the planned steel production time.

[0047] Step S240, calculating the target period pressure prediction value, the target period pressure prediction value is determined based on the time-saturated steam prediction amount curve and the preset saturated steam amount-pressure table.

[0048] In one embodiment of the present invention, the predicted amount of saturated steam at multiple moments is obtained through a moment-predicted saturated steam amount curve, and the target period includes multiple moments; the predicted pressure value of the target period is determined based on the predicted amount of saturated steam at multiple moments and a preset saturated steam amount-pressure table.

[0049] Step S250, obtaining a saturated steam flow adjustment value based on the target period pressure prediction value and preset constraints, and adjusting the opening of the regulating valve according to the saturated steam flow adjustment value to dynamically schedule the saturated steam.

[0050] In one embodiment of the present invention, obtaining the saturated steam flow regulation value based on the target time period pressure prediction value and preset constraints includes establishing a scheduling optimization model, the constraints of the scheduling optimization model include power generation equipment capacity constraints, steam consumption constraints, steam regulation speed constraints, and heat storage capacity constraints of the heat accumulator, and the optimization goal of the scheduling optimization model is that the heat storage capacity of the heat accumulator is within a preset range and the power generation equipment does not stop; based on the target time period pressure prediction and the scheduling optimization model, the saturated steam flow regulation value is obtained.

[0051] In one embodiment of the present invention, adjusting the opening of the regulating valve according to the saturated steam flow adjustment value includes establishing a preset opening model, determining parameters of the preset opening model based on historical production data, and obtaining the valve opening model; determining the corresponding valve opening based on the saturated steam flow adjustment value and the valve opening model; and adjusting the opening of the regulating valve according to the corresponding valve opening.

[0052] In one embodiment of the present invention, according to the scheduling optimization calculation, the saturated steam flow regulation value for a period of time in the future is calculated according to the prediction results with the goal of stabilizing the heat accumulator pressure and generating more power from the steam power generation equipment; according to the saturated steam flow regulation recommendation value obtained by the optimized scheduling, the valve opening model is used to calculate the corresponding valve opening under the regulation recommendation flow according to the relationship between different openings and different steam flow rates under the corresponding valve pressure changes; the calculated valve opening signal is input to the actuator of the control valve, and the actuator operates the steam flow control valve according to the instruction, thereby realizing real-time dynamic flow optimization and regulation.

[0053] In one embodiment of the present invention, the saturated steam scheduling optimization calculation uses the steam flow regulation value as the optimization parameter, under constraints such as the maximum and minimum steam consumption of the power generation equipment, the steam regulation speed, the maximum and minimum heat storage of the heat accumulator, etc.; the optimization goal is that the heat storage of the heat accumulator fluctuates within a certain range and the saturated steam power generation unit does not stop; the output result of the optimization scheduling calculation is the saturated steam flow regulation value at each time point in the future; the scheduling optimization effect under two groups of working conditions is explained below.

[0054] See also Figure 7 and Figure 8 , Figure 7 is a schematic diagram of a heat storage device before and after adjustment under a working condition shown in an exemplary embodiment of the present invention, Figure 8 FIG. 1 is a schematic diagram of a steam power generation device before and after adjustment under an operating condition according to an exemplary embodiment of the present invention; Figure 7 and Figure 8As shown in the figure, the solid line is the performance value, that is, the parameter changes of the heat accumulator and the power generation equipment without any adjustment operation; the dotted line is the scheduling value, that is, the corresponding output saturated steam flow scheduling value and the corresponding changes in the heat storage capacity of the heat accumulator after scheduling according to the saturated steam flow scheduling value.

[0055] Figure 7 , Figure 8 The prediction results under the working condition show that the heat storage capacity of the heat accumulator will gradually decrease and deviate from the reasonable range. The optimization scheduling calculation will calculate and recommend gradually reducing the steam flow of the saturated steam power generation equipment so that more steam can remain in the heat accumulator and maintain the heat storage capacity of the heat accumulator within a reasonable range.

[0056] See also Fig. 9 and Fig.10 , Fig. 9 is a schematic diagram of a heat storage device before and after adjustment under working condition 2 shown in an exemplary embodiment of the present invention; Fig.10 1 is a schematic diagram of a steam power generation device before and after adjustment under working condition 2, shown in an exemplary embodiment of the present invention; Fig. 9 and Fig.10 As shown in the figure, the solid line is the performance value, that is, the parameter changes of the heat accumulator and the power generation equipment without any adjustment operation; the dotted line is the scheduling value, that is, the corresponding output saturated steam flow scheduling value and the corresponding changes in the heat storage capacity of the heat accumulator after scheduling according to the saturated steam flow scheduling value.

[0057] Fig. 9 , Fig.10 The prediction results under working condition 2 show that the heat storage capacity of the heat accumulator will drop rapidly and seriously deviate from the reasonable range. The optimization scheduling calculation will calculate and recommend first quickly reducing the steam flow of the saturated steam power generation equipment, and then gradually maintaining the steam flow at a certain stable value, so as to maintain the heat storage capacity of the heat accumulator within a reasonable range.

[0058] In one embodiment of the present invention, the valve opening adjustment calculation model solves the problem of finding the relationship between flow and valve opening under a certain valve pressure, and calculating the corresponding valve opening according to the steam flow adjustment amount calculated by the optimization scheduling suggestion. The specific calculation formula is:

[0059] ΔP(kl+k0)=q 2 Formula (1)

[0060] In formula (1), ΔP is valve pressure, l is valve opening, q is steam flow regulation value, k and k0 are coefficients between valve opening and steam flow regulation value under certain valve pressure, and valve opening model is to calculate corresponding valve opening according to steam flow regulation value calculated by optimization scheduling suggestion by substituting fitted coefficient into this formula. Valve pressure in this embodiment refers to the pressure at both ends of regulating valve, and the valve pressure can be obtained by pressure sensor.

[0061] The valve opening signal calculated above is transmitted to the actuator of the regulating valve, which controls the valve to operate according to the calculated opening, thereby realizing dynamic valve regulation and controlling the steam flow of the steam power generation equipment, so that the heat storage capacity of the heat accumulator is always stable within a certain range.

[0062] See also Figure 3 , Figure 3 1 is a flow chart of calculation for dynamic scheduling of saturated steam shown in an exemplary embodiment of the present invention, and the calculation flow is described in detail as follows.

[0063] The historical production data is obtained through the data acquisition equipment, and the historical production data includes historical steel production, historical saturated steam production and historical operating condition indicators. The historical production data is classified according to the historical operating condition indicators, and then the saturated steam production is fitted under different operating conditions to obtain the steel production-saturated steam production curve under each operating condition. The method of operating condition classification in this embodiment includes but is not limited to clustering or classification by the change range of historical operating condition indicator parameters.

[0064] The current working condition is determined by the current production data obtained by the data acquisition equipment, and then the current production plan for a period of time in the future is substituted into the steel production-saturated steam production curve under the current working condition to obtain the time-saturated steam prediction curve to obtain the saturated steam prediction. The current production data includes the current working condition index, and the current production plan includes the planned steel production and the planned steel production time. The planned steel production is used to determine the saturated steam prediction with the steel production-saturated steam production curve, and the planned steel production time is used to determine the time when saturated steam is generated, so as to obtain the following: Figure 4 The time-saturated steam prediction curve is shown.

[0065] The time-saturated steam prediction curve is used to obtain the time from t1 to t n Predicted saturated steam quantity at multiple times, the target period includes t1 to t n Based on t1 to t n的 The predicted saturated steam quantity finds the corresponding pressure value in the preset saturated steam quantity-pressure table to obtain the predicted pressure value of the heat accumulator during the target period.

[0066] The target period pressure prediction value is input into the scheduling optimization model. The constraints of the scheduling optimization model include power generation equipment capacity constraint, steam consumption constraint, steam regulation speed constraint, and heat storage capacity constraint of the heat accumulator. The optimization goal of the scheduling optimization model is that the heat storage capacity of the heat accumulator is within the preset range and the power generation equipment does not stop. Based on the target period pressure prediction value and the scheduling optimization model, the saturated steam flow regulation value is obtained.

[0067] The saturated steam flow adjustment value is input into the valve opening model to obtain the valve opening that needs to be adjusted, and the valve opening signal is transmitted to the regulating valve actuator to control the opening of the regulating valve, thereby realizing dynamic scheduling of saturated steam.

[0068] See also Figure 5 , Figure 5 It is a target time period pressure prediction value calculation logic diagram shown in an exemplary embodiment of the present invention, firstly, the saturated steam prediction quantity is read, the temperature and enthalpy of the saturated steam at the corresponding pressure at time t are calculated, the energy change of the heat accumulator at time t is calculated, and the pressure value change caused by the fixed energy change of the submerged heat accumulator at different positions is fitted to obtain a preset saturated steam quantity-pressure table, the pressure change of the heat accumulator at time t+1 is calculated by the preset saturated steam quantity-pressure table, and then the temperature and enthalpy of the saturated steam at the corresponding pressure at time t+1 are calculated, the pressure change of the heat accumulator at time t+2 is calculated by the preset saturated steam quantity-pressure table, and then the energy change of the heat accumulator at the corresponding pressure at time t+2 is calculated, and the above steps are repeated until the energy change and pressure prediction value of the heat accumulator at time t+n are calculated, wherein the time t to time t+n is the entire prediction time period, i.e., the target time period.

[0069] After calculating the predicted pressure value from time t to time t+n, the heat storage capacity of the heat accumulator can be calculated in combination with the level of the heat accumulator, that is, the amount of saturated steam that can be evaporated. The specific prediction diagram is as follows: Figure 6 As shown, Figure 6 is a heat storage prediction curve diagram showing an exemplary embodiment of the present invention.

[0070] In the embodiment of the present invention, historical production data is clustered, thereby classifying the working conditions of the historical production data to enhance the accuracy of prediction.

[0071] In the embodiment of the present invention, the operating condition classification is performed on the historical production data based on the parameter range of the historical operating condition index, which is simple and efficient and enhances the accuracy of the prediction.

[0072] In the embodiment of the present invention, by planning the steel production time to obtain the time-saturated steam prediction curve, the time point of saturated steam generation can be obtained, which is more convenient for dynamic scheduling of saturated steam.

[0073] In the embodiment of the present invention, the pressure prediction value of the target time period is determined by presetting a saturated steam quantity-pressure table, which is simple and efficient and makes the prediction more accurate.

[0074] In the embodiment of the present invention, a scheduling optimization model is established and constraint conditions are set to obtain a saturated steam flow regulation value, so that the heat storage capacity of the heat accumulator is within a certain range and the power generation equipment does not stop.

[0075] In the embodiment of the present invention, the corresponding valve opening is determined by establishing a valve opening model, and the valve opening of the regulating valve is controlled according to the corresponding valve opening, thereby realizing the scheduling of saturated steam.

[0076] See also Fig.11 , Fig.11 It is a block diagram of a saturated steam dynamic scheduling device shown in an exemplary embodiment of the present invention. The saturated steam dynamic scheduling device includes a data acquisition module 1101, a classification fitting module 1102, a steam prediction module 1103, a pressure prediction module 1104 and a regulating valve module 1105.

[0077] The data acquisition module 1101 is used to acquire historical production data, current production data and current production plan. The historical production data includes historical steel production, historical saturated steam production and historical operating conditions. The current production data includes current operating conditions. The current production plan includes planned steel production and planned steel production time.

[0078] The classification fitting module 1102 is used to classify the historical production data according to the historical working condition indicators, and fit the historical production data under each working condition to obtain the steel production-saturated steam production curve under each working condition;

[0079] The steam prediction module 1103 is used to determine the target working condition and the steel production-saturated steam production curve under the target working condition through the current working condition index, and obtain the time-saturated steam prediction curve based on the planned steel production time, the planned steel production and the steel production-saturated steam production curve under the target working condition;

[0080] The pressure prediction module 1104 is used to calculate the pressure prediction value of the target period, and the pressure prediction value of the target period is determined based on the time-saturated steam prediction amount curve and the preset saturated steam amount-pressure table;

[0081] The regulating valve module 1105 is used to obtain a saturated steam flow regulating value based on the target period pressure prediction value and preset constraints, and to adjust the opening of the regulating valve according to the saturated steam flow regulating value to dynamically schedule the saturated steam.

[0082] It should be noted that the saturated steam dynamic scheduling device provided in the above embodiment and the saturated steam dynamic scheduling method provided in the above embodiment belong to the same concept, wherein the specific manner in which each module and unit performs the operation has been described in detail in the method embodiment, and will not be repeated here. In practical applications, the saturated steam dynamic scheduling device provided in the above embodiment can allocate the above functions to different functional modules as needed, that is, divide the internal structure of the device into different functional modules to complete all or part of the functions described above, and this is not limited here.

[0083] An embodiment of the present invention also provides an electronic device, comprising: one or more processors; a storage device for storing one or more programs, and when the one or more programs are executed by the one or more processors, the electronic device implements the saturated steam dynamic scheduling method provided in the above-mentioned embodiments.

[0084] Fig.12 The structure diagram of the computer system of the electronic device suitable for implementing the embodiment of the present invention is shown. It should be noted that: Fig.12 The computer system 1200 of the electronic device shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0085] like Fig.12 As shown, the computer system 1200 includes a central processing unit (CPU) 1201, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 1202 or the program loaded from the storage part 1208 to the random access memory (RAM) 1203, such as executing the method described in the above embodiment. In the RAM 1203, various programs and data required for system operation are also stored. The CPU 1201, the ROM 1202 and the RAM 1203 are connected to each other through the bus 1204. The input / output (I / O) interface 1205 is also connected to the bus 1204.

[0086] The following components are connected to the I / O interface 1205: an input section 1206 including a keyboard, a mouse, etc.; an output section 1207 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 1208 including a hard disk, etc.; and a communication section 1209 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 1209 performs communication processing via a network such as the Internet. A drive 1210 is also connected to the I / O interface 1205 as needed. A removable medium 1211, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 1210 as needed so that a computer program read therefrom is installed into the storage section 1208 as needed.

[0087] In particular, according to an embodiment of the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present invention includes a computer program product, which includes a computer program carried on a computer readable medium, and the computer program includes a computer program for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication section 1209, and / or installed from a removable medium 1211. When the computer program is executed by a central processing unit (CPU) 1201, various functions defined in the system of the present invention are executed.

[0088] It should be noted that the computer-readable medium shown in the embodiment of the present invention may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable computer program. This propagated data signal may take a variety of forms, including but not limited to an electromagnetic signal, an optical signal, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. A computer program contained on a computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0089] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architecture, functions and operations of the systems, methods and computer program products according to various embodiments of the present invention. Among them, each box in the flowchart or block diagram can represent a module, a program segment, or a part of the code, and the above-mentioned module, program segment, or a part of the code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flowchart, and the combination of boxes in the block diagram or flowchart, can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0090] The units involved in the embodiments of the present invention may be implemented by software or hardware, and the units described may also be arranged in a processor. The names of these units do not, in some cases, limit the units themselves.

[0091] Another aspect of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor of a computer, causes the computer to execute the saturated steam dynamic scheduling method as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiment, or may exist independently without being assembled into the electronic device.

[0092] Another aspect of the present invention further provides a computer program product or a computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the saturated steam dynamic scheduling method provided in each of the above embodiments.

[0093] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A saturated steam dynamic scheduling method, characterized in that: The saturated steam dynamic scheduling method comprises: Acquire historical production data, current production data and current production plan, wherein the historical production data includes historical steel production, historical saturated steam production and historical operating condition indicators, the current production data includes current operating condition indicators, and the current production plan includes planned steel production and planned steel production time; Classifying the historical production data according to the historical operating condition indicators, and fitting the historical production data under each operating condition to obtain a steel production-saturated steam production curve under each operating condition; Compare various parameters of the current operating condition index with various parameters of historical operating condition indexes under the various operating conditions, determine the operating condition that is most similar to the current operating condition index as the target operating condition, and determine the steel production-saturated steam production curve under the target operating condition, obtain the saturated steam forecast according to the planned steel production and the steel production-saturated steam production curve; obtain the time-saturated steam forecast curve based on the saturated steam forecast and the planned steel production time; Calculating a target period pressure prediction value, wherein the target period pressure prediction value is determined based on the time-saturated steam prediction amount curve and a preset saturated steam amount-pressure table; A saturated steam flow rate regulation value is obtained based on the target time period pressure prediction value and preset constraints, and the opening of the regulating valve is adjusted according to the saturated steam flow rate regulation value to dynamically schedule the saturated steam.

2. The saturated steam dynamic scheduling method according to claim 1, characterized in that: Classifying the working condition of the historical production data according to the historical working condition indicators includes: Clustering the historical production data to obtain multiple cluster groups; The operating condition type of the cluster group is determined based on the historical operating condition index of the cluster group to classify the operating condition of the historical production data.

3. The saturated steam dynamic scheduling method according to claim 1, characterized in that: Classifying the working condition of the historical production data according to the historical working condition indicators also includes: If the historical operating condition index in the historical production data meets the parameter range of the reference operating condition in the preset operating condition table, the historical production data is determined as the classification of the reference operating condition.

4. The saturated steam dynamic scheduling method according to any one of claims 1 to 3, characterized in that: Calculating the target period pressure forecast value includes: Obtaining the predicted amount of saturated steam at multiple moments through the moment-saturated steam predicted amount curve, wherein the target period includes the multiple moments; The target period pressure prediction value is determined based on the saturated steam prediction quantities at the plurality of moments and the preset saturated steam quantity-pressure table.

5. The saturated steam dynamic scheduling method according to any one of claims 1 to 3, characterized in that: The saturated steam flow rate adjustment value obtained based on the target period pressure prediction value and the preset constraint conditions includes: Establishing a scheduling optimization model, wherein the constraints of the scheduling optimization model include power generation equipment capacity constraints, steam consumption constraints, steam regulation speed constraints, and heat storage capacity constraints of the heat accumulator, and the optimization goal of the scheduling optimization model is that the heat storage capacity of the heat accumulator is within a preset range and the power generation equipment does not stop; The saturated steam flow adjustment value is obtained based on the target period pressure prediction value and the scheduling optimization model.

6. The saturated steam dynamic scheduling method according to any one of claims 1 to 3, characterized in that: Adjusting the opening of the regulating valve according to the saturated steam flow adjustment value includes: Establishing a preset opening model, determining parameters of the preset opening model based on the historical production data, and obtaining a valve opening model; Determining a corresponding valve opening based on the saturated steam flow adjustment value and the valve opening model; The opening of the regulating valve is adjusted according to the corresponding valve opening.

7. A saturated steam dynamic scheduling device, characterized in that: The saturated steam dynamic scheduling device comprises: A data acquisition module, used to acquire historical production data, current production data and current production plan, wherein the historical production data includes historical steel production, historical saturated steam production and historical operating condition indicators, the current production data includes current operating condition indicators, and the current production plan includes planned steel production and planned steel production time; A classification fitting module, used for classifying the historical production data according to the historical operating condition indicators, and fitting the historical production data under each operating condition to obtain a steel production-saturated steam production curve under each operating condition; A steam prediction module is used to compare various parameters of the current operating condition index with various parameters of the historical operating condition index under the various operating conditions, determine the operating condition that is most similar to the current operating condition index as the target operating condition, and determine the steel production-saturated steam production curve under the target operating condition, obtain the saturated steam prediction amount according to the planned steel production and the steel production-saturated steam production curve; obtain the time-saturated steam prediction amount curve based on the saturated steam prediction amount and the planned steel production time; A pressure prediction module, used for calculating a target period pressure prediction value, wherein the target period pressure prediction value is determined based on the time-saturated steam prediction amount curve and a preset saturated steam amount-pressure table; The regulating valve module is used to obtain a saturated steam flow regulating value based on the target period pressure prediction value and preset constraints, and to adjust the opening of the regulating valve according to the saturated steam flow regulating value to dynamically schedule the saturated steam.

8. An electronic device, characterized in that: The electronic device comprises: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, enables the electronic device to implement the saturated steam dynamic scheduling method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor of a computer, the computer is caused to execute the saturated steam dynamic scheduling method according to any one of claims 1 to 6.

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