Methods, systems, devices, and media for order demand and low power cost device start-stop and job rate adjustment

Abstract

The application discloses a kind of equipment start-stop and operation rate regulation method, system, equipment and medium satisfying order demand and low power consumption cost, wherein the method is: according to production link and adjustable repository distribution, the power consumption equipment between adjacent repositories is merged;Then, for the power consumption equipment of each production link, the initial operation scheme of the power consumption equipment satisfying the daily output demand of the corresponding production link is generated, and on this basis, the scheme is gradually optimized, and the scheme satisfying the maximum continuous shutdown time constraint, the scheme satisfying the repository inventory constraint, the low operation cost scheme and the equipment operation scheme satisfying the order demand are sequentially generated.The application satisfies low power consumption cost and production order demand of production process type enterprise by power consumption equipment round stop control and its operation rate regulation, which helps to alleviate the contradiction between power supply and demand of system and improve production efficiency.

Description

Technical Field

[0001] This invention relates to the field of equipment rotation control technology for production process enterprises, and in particular to a method, system, equipment, and medium for equipment start-up and shutdown and operation rate adjustment that meets order requirements and low electricity costs. Background Technology

[0002] With the increasing proportion of clean energy connected to the grid and the continuous rise in user electricity demand, the uncertainty and discontinuity of its output are becoming increasingly apparent. During peak electricity demand periods, supply pressure increases; while during off-peak periods, electricity waste is severe. This supply-demand imbalance exacerbates the operational pressure on the power system, placing higher demands on ensuring its safety and stability. By incentivizing users to adjust their electricity consumption habits, including usage time and amount, demand response can help achieve a flexible match between electricity supply and demand, enhance the utilization efficiency of clean energy, and promote sustainable energy development. Cement, steel, and other process-oriented enterprises are mostly energy-intensive, and their production loads are highly adjustable and have a wide adjustment range, making them an important component of demand-side adjustable resources. Researching methods for equipment start-up and shutdown and operating rate adjustment in process-oriented enterprises can help alleviate the power supply-demand imbalance in the system, improve production efficiency, and reduce emissions. Summary of the Invention

[0003] The purpose of this invention is to provide a method, system, device, and medium for regulating the start-up, shutdown, and operation rate of equipment to meet order demands and reduce electricity costs, thereby regulating the start-up, shutdown, and operation rate of equipment in production process enterprises, alleviating the contradiction between power supply and demand in the system, and improving production efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] Firstly, a method for adjusting equipment start-up, shutdown, and operating rates to meet order demands and reduce electricity costs is provided, including the following steps:

[0006] S1: Collect information on the production process and distribution of adjustable storage facilities in process-oriented enterprises, and merge the electrical equipment used in the production process between all adjacent adjustable storage facilities;

[0007] S2: Determine the daily output requirement for a single production stage. ; Calculate the electrical equipment used in the current production process The minimum number of operating segments required to meet daily production demands under conditions of maximum operating rate. Select the lowest electricity price based on electricity price data. Each time period will be used by the corresponding electrical equipment. Set to operating status to form the initial operating plan for equipment with the lowest electricity cost. ;

[0008] S3: Based on the scheme Select the number of consecutive time periods when the electrical equipment is out of service, and construct a set of all consecutive outage durations. ;

[0009] S4: From the plan Read from Compare the maximum number of consecutive downtime periods for electrical equipment under the current scheme. With the maximum number of consecutive downtime constraints ,like The current solution is the one that satisfies the maximum continuous downtime constraint. Proceed to step S5; if Revised Plan The status of electrical equipment in the middle is to determine the number of consecutive downtime periods that are greater than 100%. During the period of lowest electricity price, the status of electrical equipment is set to running and operates at the highest operating rate, and the data set is updated. Repeat step S4 until the maximum continuous downtime constraint is met, thus forming a solution that satisfies the maximum continuous downtime constraint. ;

[0010] S5: Based on the solution If the inventory level in the storage facility exceeds the minimum inventory warning value at any given time, then the current solution satisfies the storage inventory constraint. Proceed to step S6; if the inventory level in the discharge storage is less than the minimum inventory warning value, adjust the plan. The start / stop status of the device is selected from the set. During periods of lowest electricity prices, electrical equipment is set to operating status and runs at its highest operating rate, and the data set is updated. Repeat step S5 until the warehouse inventory constraint is met, thus forming a solution that satisfies the warehouse inventory constraint. ;

[0011] S6: From the plan Read from Based on electrical equipment The physical parameters, calculation set All electrical equipment under continuous downtime conditions should be shut down at the lowest operating rate. Work, at the highest operating rate The operating costs under three working states are analyzed, and the state with the lowest cost is selected to operate the electrical equipment, thus forming a low-operating-cost solution. ;

[0012] S7: Based on the scheme The start / stop status and operating rate of the equipment are used to calculate the daily order output for the current stage. Daily production demand The difference Reduce the output of electrical equipment during its highest operating rate period, and calculate the corresponding time period to be adjusted down from the highest operating rate period. Reduced output and corresponding adjustment costs ,in and These are the critical and minimum operating rates of the electrical equipment; the reduction in output is calculated by ordering adjustment costs from low to high. Sequence; Daily production reduction demand Subtract the decrease in output in the sequence one by one Simultaneously, the operating speed of electrical equipment during the corresponding time periods is adjusted until the daily output constraint is met, ultimately forming an equipment operation plan that meets order requirements. ;

[0013] S8: For different electrical equipment, repeat steps S2-S7 until the operation plan for all electrical equipment in the production process is completed.

[0014] Furthermore, in step S2, the daily output requirement of the i-th production stage... The following formula is used to calculate:

[0015]

[0016] In the formula, To meet the daily order production needs of process-oriented enterprises, Let be the material loss rate at the j-th production stage, and s represent the total number of production stages.

[0017] Minimum number of operating segments to meet daily production requirements The following formula is used to calculate:

[0018]

[0019] In the formula, For the first The maximum operating rate of electrical equipment in each production stage. This indicates rounding down to the nearest integer.

[0020] Furthermore, in step S5, the warehouse inventory constraint is expressed as follows:

[0021]

[0022] In the formula, For the first The electrical equipment in each production stage is in the first The work rate for each time period For the scheduling period, For the first Minimum inventory warning value for material discharge storage at each production stage. For the first The electrical equipment in each production stage is in the first Inventory levels for each time period.

[0023] Furthermore, in step S6, the operating cost of the electrical equipment when it is in a shutdown state is... The calculation formula is:

[0024]

[0025] in, Composed of start-up and shutdown costs; and The first Start-up and shutdown costs of electrical equipment in each production stage;

[0026] Electrical equipment should be operated at the lowest possible operating rate. Operating costs during the period The calculation formula is:

[0027]

[0028] in, It consists of speed regulation costs and electricity costs; For the first Adjustment cost per unit power change of electrical equipment in each production stage and The first The maximum and minimum power consumption of electrical equipment in each production stage. For the first Electricity price for each time period, The scheduling period;

[0029] Electrical equipment is operating at its highest operating rate. Operating costs during the period The calculation formula is:

[0030]

[0031] in, It consists of electricity costs.

[0032] Furthermore, in step S7, the daily order output of the current stage... Daily production demand The difference The following formula is used to calculate:

[0033]

[0034] In the formula, For the first The operating rate of electrical equipment in each production stage, where T is the total number of time periods. The scheduling period is [number].

[0035] Furthermore, in step S7, the period during which production needs to be reduced corresponds to the production reduction. and adjustment costs The following formula is used to calculate:

[0036]

[0037]

[0038] In the formula, For the scheduling period, For the first Adjustment cost per unit power change of electrical equipment in each production stage For the first The electrical equipment in each production stage is in the first Power consumption during each time period For the first Electricity prices for specific time periods.

[0039] Furthermore, in step S7, the daily output constraint is expressed as follows:

[0040]

[0041] In the formula, This is the daily output constraint coefficient for the equipment.

[0042] Secondly, a system for regulating equipment start-up, shutdown, and operating rate that meets order demands and requires low electricity costs is provided, including:

[0043] The data acquisition module is used to collect information on the production processes and distribution of adjustable storage facilities in process-oriented enterprises, as well as the physical parameters of electrical equipment in each production process, the physical parameters of adjustable storage facilities, and electricity price data.

[0044] The data processing module is configured to execute the equipment start-up and shutdown and operation rate adjustment methods described above to meet order requirements and low power costs, and obtain the operation plan of all electrical equipment in the production process;

[0045] The execution module is used to start, stop, and adjust the operating speed of electrical equipment in each production stage of a process-oriented enterprise according to the operating plan of all electrical equipment in the production process.

[0046] Thirdly, an electronic device is provided, comprising:

[0047] A memory on which computer programs or instructions are stored;

[0048] A processor is used to load and execute the computer program or instructions to implement the equipment start-up and operation rate regulation methods described above, which meet order requirements and have low power costs.

[0049] Fourthly, a computer-readable storage medium is provided, on which a computer program or instructions are stored, which, when executed by a processor, implement the aforementioned method for equipment start-up and shutdown and operation rate adjustment to meet order requirements and achieve low power costs.

[0050] This invention proposes a method, system, equipment, and medium for equipment start-up, shutdown, and operation rate adjustment that meets order demands and low electricity costs. For each production stage's electrical equipment, it generates an initial operating plan with the lowest electricity cost to meet the daily output requirements of that stage. Based on this, the plan is progressively optimized, successively generating a plan that meets the maximum continuous downtime constraint, a plan that meets inventory constraints, a low-operating-cost plan, and finally, an equipment operation plan that meets order demands. This invention, through the control of rotating shutdowns of electrical equipment and the adjustment of its operation rate, meets the low electricity costs and production order demands of process-oriented enterprises, helping to alleviate the power supply and demand imbalance in the system, improve production efficiency, and reduce emissions. Attached Figure Description

[0051] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0052] Figure 1 This is a flowchart of a method for adjusting equipment start-up and operation rate to meet order requirements and low electricity costs, provided by an embodiment of the present invention.

[0053] Figure 2 This is a production flow chart of a cement enterprise provided in an embodiment of the present invention;

[0054] Figure 3 This is an electricity price curve provided in an embodiment of the present invention;

[0055] Figure 4 This is a comparison chart of the electricity load curves of cement enterprises under two schemes provided in the embodiments of the present invention;

[0056] Figure 5 This is a comparison chart of the crusher discharge rate curves under two schemes provided in the embodiments of the present invention;

[0057] Figure 6 This is a comparison chart of the material output rate curves of the conveyor motor under two different schemes provided in the embodiments of the present invention;

[0058] Figure 7 This is a comparison chart of the raw material mill discharge rate curves under two schemes provided in the embodiments of the present invention;

[0059] Figure 8 This is a comparison chart of the clinker mill discharge rate curves under two schemes provided in the embodiments of the present invention;

[0060] Figure 9 This is a comparison chart of the operating costs of cement enterprises for two different solutions provided in the embodiments of the present invention. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0062] like Figure 1 As shown, the present invention provides a method for adjusting equipment start-up, shutdown, and operating rate to meet order demands and achieve low electricity costs, comprising the following steps:

[0063] S1: Collect data on the production processes and adjustable storage distribution of process-oriented enterprises. Merge the electrical equipment used in the production processes between any two adjacent adjustable storage facilities. The electrical equipment involved in each production process after merging is denoted as follows: s represents the total number of stages.

[0064] like Figure 2 The diagram shows the production flow chart of a cement enterprise. Circles represent adjustable storage tanks, and boxes represent production links or corresponding electrical equipment. Normally, the raw material tank and clinker tank are two adjacent adjustable storage tanks. There are three sub-production links between them: raw material preheating, clinker calcination, and clinker cooling. However, since there are no adjustable storage tanks between these three sub-production links, they need to operate synchronously. Therefore, in this implementation, in order to facilitate the generation of adjustment schemes, these three sub-production links are merged into one clinker preparation link. This means that the electrical equipment for the three links of raw material preheating, clinker calcination, and clinker cooling are unified into one clinker preparation electrical equipment.

[0065] S2: Collect daily order demand and material loss rate of each production stage from process-oriented enterprises, construct a daily output demand model, and calculate the daily output demand of a single production stage. Collect data on the electrical equipment used in the current process. Based on the highest operating rate, construct a minimum runtime model to calculate the current equipment consumption in the production process. The minimum number of operating segments required to meet daily production demands under conditions of maximum operating rate. Based on electricity price data obtained from the power trading center, the lowest electricity price is selected. The electrical equipment used during each time period (if the electricity price data is 24-hour data, then each time period corresponds to one hour; if the electricity price data is 96-hour data, then each time period corresponds to 15 minutes) will be divided into time periods. status Set to 1 to form the initial operating plan for equipment with the lowest electricity cost. Among them, electrical equipment status The value can be either 0 or 1. A value of 0 indicates that the electrical equipment is in a stopped state, while a value of 1 indicates that the electrical equipment is in a running state. The initial step is to produce a solution that meets daily production demands while minimizing electricity costs. Optimizing this basic solution can improve the efficiency of generating the final solution.

[0066] Specifically, the daily production demand model is expressed as follows:

[0067]

[0068] In the formula, The daily output requirement for the i-th production stage is: To meet the daily order production needs of process-oriented enterprises, Let be the material loss rate at the j-th production stage, and s represent the total number of production stages.

[0069] Minimum number of operating segments to meet daily production requirements The following formula is used to calculate:

[0070]

[0071] In the formula, Let be the maximum operating rate of the electrical equipment in the i-th production stage. This indicates rounding down to the nearest integer.

[0072] S3: Based on the scheme Select the power equipment in the off state (i.e., The number of consecutive time periods, from The period begins, and continuous shutdown is confirmed. Duration of the period , recorded as and placed in a set In the middle; further, place all continuous downtime durations into a set Among them This represents the maximum number of consecutive downtime periods under the current scheme.

[0073] S4: From the plan Read from Compare the electrical equipment under the current plan Maximum number of consecutive downtime periods With the maximum number of consecutive downtime constraints ,like The current solution is the one that satisfies the maximum continuous downtime constraint. Proceed to step S5; if Revised Plan The status of electrical equipment in the middle is to determine the number of consecutive downtime periods that are greater than 100%. Status of electrical equipment during the period with the lowest electricity price Set to 1 and run at the highest job rate to update the set. Repeat step S4 until the maximum continuous downtime constraint is met, thus forming a solution that satisfies the maximum continuous downtime constraint. By using the electrical equipment under the current scheme Maximum number of consecutive downtime periods With the maximum number of consecutive downtime constraints A comparison was made to optimize the schemes that did not meet the maximum continuous downtime constraint. During the optimization process, the state of the electrical equipment during the period with the lowest electricity price in the continuous downtime was still selected to ensure that the maximum continuous downtime constraint was met while keeping the electricity cost as low as possible.

[0074] S5: From the plan Read from Based on electrical equipment A storage inventory constraint model is constructed by considering the outgoing storage inventory and its minimum inventory warning value. Starting from the initial time, the outgoing storage inventory is compared with the minimum inventory warning value for each time period. If the outgoing storage inventory is greater than the minimum inventory warning value for any time period, the current solution satisfies the storage inventory constraint. Proceed to step S6; if the inventory level in the discharge storage is less than the minimum inventory warning value, adjust the plan. The start / stop status of the device is selected from the set. During the period with the lowest electricity price, the status of electrical equipment during that period. Set to 1 and run at the highest job rate to update the set. Repeat step S5 until the warehouse inventory constraint is met, thus forming a solution that satisfies the warehouse inventory constraint. When the inventory level in the material discharge storage is less than the minimum inventory warning value, the scheme that does not meet the storage inventory constraint is optimized. During the optimization process, the status of the electrical equipment during the period with the lowest electricity price among all continuous shutdown periods is still selected to ensure that the storage inventory constraint is met while minimizing electricity costs.

[0075] The warehouse inventory constraint model is represented as follows:

[0076]

[0077] In the formula, For the first The electrical equipment in each production stage is in the first The work rate for each time period For the scheduling period, For the first Minimum inventory warning value for material discharge storage at each production stage. For the first The electrical equipment in each production stage is in the first Inventory levels for each time period.

[0078] S6: From the plan Read from Based on electrical equipment The physical parameters, including operating speed and power consumption, are used to calculate the set. All electrical equipment under continuous downtime conditions should be shut down at the lowest operating rate. Work, at the highest operating rate The operating costs under three working states are analyzed, and the state with the lowest cost is selected to operate the electrical equipment, thus forming a low-operating-cost solution. By comparing the operating costs under the three conditions, the plan is adjusted based on the condition with the lowest operating cost, minimizing operating costs while ensuring daily production requirements are met.

[0079] In this embodiment, the operating cost of the electrical equipment when it is in a shutdown state is... The calculation formula is:

[0080]

[0081] in, Composed of start-up and shutdown costs; and The first Start-up and shutdown costs of electrical equipment in each production stage;

[0082] Electrical equipment should be operated at the lowest possible operating rate. Operating costs during the period The calculation formula is:

[0083]

[0084] in, It consists of speed regulation costs and electricity costs; For the first Adjustment cost per unit power change of electrical equipment in each production stage and The first The maximum and minimum power consumption of electrical equipment in each production stage. For the first Electricity price for each time period, The scheduling period;

[0085] Electrical equipment is operating at its highest operating rate. Operating costs during the period The calculation formula is:

[0086]

[0087] in, It consists of electricity costs.

[0088] S7: Based on the scheme Based on the start-up and shutdown status and operating rate of the equipment, a daily output reduction demand model is constructed to calculate the daily order output for the current stage. Daily production demand The difference To reduce the output of electrical equipment during its highest operating rate, a model for reducing daily equipment output and a model for adjusting costs are constructed. The corresponding time period for reducing output from the highest operating rate period is calculated. Reduced output and corresponding adjustment costs ,in and These are the critical and minimum operating rates of the electrical equipment; the reduction in output is calculated by ordering adjustment costs from low to high. Sequence; Construct a daily output constraint model, where daily output reduces demand. Subtract the decrease in output in the sequence one by one Simultaneously, the operating speed of electrical equipment during the corresponding time periods is adjusted until the daily output constraint is met, ultimately forming an equipment operation plan that meets order requirements. By minimizing electricity costs while ensuring daily production needs are met, the final solution achieves both order fulfillment and low electricity costs.

[0089] The demand model for daily production cuts is expressed as follows:

[0090]

[0091] In the formula, For the first The operating rate of electrical equipment in each production stage, where T is the total number of time periods. The scheduling period is [number].

[0092] The daily output reduction model and adjustment cost model are expressed as follows:

[0093]

[0094]

[0095] In the formula, For the scheduling period, For the first Adjustment cost per unit power change of electrical equipment in each production stage For the first The electrical equipment in each production stage is in the first Power consumption during each time period For the first Electricity prices for specific time periods.

[0096] The daily output constraint model is represented as follows:

[0097]

[0098] In the formula, This is the daily output constraint coefficient for the equipment, and its value is generally between 0 and 0.05.

[0099] S8: For different electrical equipment, steps S2-S7 can be repeated according to the production process sequence to complete the operation plan for all electrical equipment in the production process.

[0100] The above embodiments provide a method for adjusting equipment start-up, shutdown, and operating rates to meet order demands and achieve low electricity costs. For each production stage's electrical equipment, an initial operating plan with the lowest electricity cost is generated to meet the daily output requirements of the corresponding production stage. Based on this, the plan is progressively optimized, successively generating a plan that meets the maximum continuous downtime constraint, a plan that meets inventory constraints, a low-operating-cost plan, and finally, an equipment operating plan that meets order demands. This invention, through the control of rotating shutdowns of electrical equipment and the adjustment of its operating rates, meets the needs of process-oriented enterprises for low electricity costs and production order demands, helping to alleviate the contradiction between power supply and demand in the system, improve production efficiency, and reduce emissions.

[0101] This invention also provides a system for regulating equipment start-up, shutdown, and operating rate to meet order demands and reduce electricity costs, comprising:

[0102] The data acquisition module is used to collect information on the production process and distribution of adjustable storage facilities in production process enterprises, as well as the physical parameters of the electrical equipment in each production process (including power consumption, operating speed, daily output demand, etc.), the physical parameters of adjustable storage facilities (including storage inventory and minimum inventory warning value, etc.), and electricity price data (24-hour electricity price data or 96-hour electricity price data).

[0103] The data processing module is configured to execute the equipment start-up and shutdown and operation rate adjustment methods described above to meet order requirements and low power costs, and obtain the operation plan of all electrical equipment in the production process;

[0104] The execution module is used to start, stop, and adjust the operating speed of electrical equipment in each production stage of a process-oriented enterprise according to the operating plan of all electrical equipment in the production process.

[0105] This invention also provides an electronic device, comprising:

[0106] A memory on which computer programs or instructions are stored;

[0107] A processor is used to load and execute the computer program or instructions to implement the equipment start-up and operation rate regulation methods described above, which meet order requirements and have low power costs.

[0108] This invention also provides a computer-readable storage medium storing a computer program or instructions thereon, which, when executed by a processor, implements the aforementioned method for equipment start-up and shutdown and operation rate adjustment to meet order requirements and low power costs.

[0109] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0110] The following analysis uses a cement company as a typical production process enterprise to further illustrate the effectiveness of the technical solution of this invention.

[0111] Assuming a cement plant's daily output is 5000 tons and its power consumption is 45000 kW; the physical parameters of the cement plant and the equipment parameters of the cement storage silos are shown in Tables 1 and 2, respectively. The real-time electricity price curve is shown below. Figure 3 As shown, two schemes are selected for comparative calculation: Scheme 1: Under a fixed electricity price, production equipment is planned according to product order demand; Scheme 2: Under a real-time electricity price, the enterprise arranges production equipment planning by adjusting equipment start-up and shutdown and operating rate.

[0112]

[0113]

[0114] The electricity load curves for cement plants under Scheme 1 and Scheme 2 are as follows: Figure 4 As shown in the figure, the comparison curves of the discharge rate of the crusher, conveyor motor, raw material mill, and clinker mill are as follows: Figure 5-8 As shown in the diagram, in Scheme 1, the production equipment operates at a constant power and speed according to daily output requirements. Due to poor visibility at night and potential safety hazards in the crushing and transportation processes, the equipment's operating hours are set from 7:00 to 19:00. Therefore, the crusher and conveyor motors operate at constant power with discharge rates of 429 t / h and 215 t / h respectively during the operating hours to meet daily output demands. The raw material mill and clinker mill operate throughout the day, maintaining constant power with discharge rates of 236 t / h and 215 t / h respectively at all times. Under this scheme, the user's electricity load is higher during the crushing and transportation operating hours from 7:00 to 19:00, and lowest during other times.

[0115] Scheme Two, employing equipment start-up and shutdown and operating rate adjustment methods under real-time electricity pricing, improves the ability to reduce load during peak periods by lowering the discharge rate and operating production equipment at low power during multiple peak periods, while still meeting production order demands. The raw material mill and clinker mill transitioned from shutdown to minimum discharge rates of 114 t / h and 103.5 t / h respectively at 11:00 AM, reducing the peak load from 48.73 MW to 26.02 MW, a reduction of 46.6%. Regarding enterprise operating costs, such as... Figure 9 As shown, Option 2 increases start-up and shutdown costs by 35,000 yuan and speed regulation costs by 5,300 yuan, but reduces the company's electricity costs by 215,700 yuan, resulting in a total cost reduction of 175,400 yuan.

[0116] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0117] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0118] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0119] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0120] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for adjusting equipment start-up, shutdown, and operating speed to meet order demands and reduce electricity costs, characterized in that, Includes the following steps: S1: Collect information on the production process and distribution of adjustable storage facilities in process-oriented enterprises, and merge the electrical equipment used in the production process between all adjacent adjustable storage facilities; S2: Determine the daily output requirement for a single production stage. ; Calculate the electrical equipment used in the current production process The minimum number of operating segments required to meet daily production demands under conditions of maximum operating rate. ; Select the lowest electricity price based on electricity price data. Each time period will be used by the corresponding electrical equipment. Set to operating status to form the initial operating plan for equipment with the lowest electricity cost. ; S3: Based on the scheme Select the number of consecutive time periods when the electrical equipment is out of service, and construct a set of all consecutive outage durations. ; S4: From the plan Read from Compare the maximum number of consecutive downtime periods for electrical equipment under the current scheme. With the maximum number of consecutive downtime constraints ,like The current solution is the one that satisfies the maximum continuous downtime constraint. Proceed to step S5; if Revised Plan The status of electrical equipment in the middle is to determine the number of consecutive downtime periods that are greater than 100%. During the period of lowest electricity price, the status of electrical equipment is set to running and operates at the highest operating rate, and the data set is updated. Repeat step S4 until the maximum continuous downtime constraint is met, thus forming a solution that satisfies the maximum continuous downtime constraint. ; S5: Based on the solution If the inventory level in the storage facility exceeds the minimum inventory warning value at any given time, then the current solution satisfies the storage inventory constraint. Proceed to step S6; If the inventory level in the discharge storage is less than the minimum inventory warning value, the corrective action plan will be implemented. The start / stop status of the device is selected from the set. During periods of lowest electricity prices, electrical equipment is set to operating status and runs at its highest operating rate, and the data set is updated. Repeat step S5 until the warehouse inventory constraint is met, thus forming a solution that satisfies the warehouse inventory constraint. ; S6: From the plan Read from Based on electrical equipment The physical parameters, calculation set All electrical equipment under continuous downtime conditions should be shut down at the lowest operating rate. Work, at the highest operating rate The operating costs under three working states are analyzed, and the state with the lowest cost is selected to operate the electrical equipment, thus forming a low-operating-cost solution. ; S7: Based on the scheme The start / stop status and operating rate of the equipment are used to calculate the daily order output for the current stage. Daily production demand The difference Reduce the output of electrical equipment during its highest operating rate period, and calculate the corresponding time period to be adjusted down from the highest operating rate period. Reduced output and corresponding adjustment costs ,in and These are the critical and minimum operating rates of the electrical equipment; the reduction in output is calculated by ordering adjustment costs from low to high. Sequence; Daily production reduction demand Subtract the decrease in output in the sequence one by one Simultaneously, the operating speed of electrical equipment during the corresponding time periods is adjusted until the daily output constraint is met, ultimately forming an equipment operation plan that meets order requirements. ; S8: For different electrical equipment, repeat steps S2-S7 until the operation plan for all electrical equipment in the production process is completed.

2. The equipment start-up and operation rate adjustment method according to claim 1, which meets order requirements and low electricity costs, is characterized in that... In step S2, the daily output requirement of the i-th production stage is... The following formula is used to calculate: ； In the formula, To meet the daily order production needs of process-oriented enterprises, Let be the material loss rate at the j-th production stage, and s represent the total number of production stages. Minimum number of operating segments to meet daily production requirements The following formula is used to calculate: ； In the formula, For the first The maximum operating rate of electrical equipment in each production stage. This indicates rounding down to the nearest integer.

3. The equipment start-up and operation rate adjustment method according to claim 1, which meets order requirements and low electricity costs, is characterized in that... In step S5, the warehouse inventory constraint is expressed as follows: ； In the formula, For the first The electrical equipment in each production stage is in the first The work rate for each time period For the scheduling period, For the first Minimum inventory warning value for material discharge storage at each production stage. For the first The electrical equipment in each production stage is in the first Inventory levels for each time period.

4. The equipment start-up and operation rate adjustment method according to claim 1, which meets order requirements and low electricity costs, is characterized in that... In step S6, the operating cost of the electrical equipment when it is in the shutdown state. The calculation formula is: ； in, Composed of start-up and shutdown costs; and The first Start-up and shutdown costs of electrical equipment in each production stage; Electrical equipment should be operated at the lowest possible operating rate. Operating costs during the period The calculation formula is: ； in, It consists of speed regulation costs and electricity costs; For the first Adjustment cost per unit power change of electrical equipment in each production stage and The first The maximum and minimum power consumption of electrical equipment in each production stage. For the first Electricity price for each time period, The scheduling period; Electrical equipment is operating at its highest operating rate. Operating costs during the period The calculation formula is: ； in, It consists of electricity costs.

5. The equipment start-up and operation rate adjustment method according to claim 1, which meets order requirements and low electricity costs, is characterized in that... In step S7, the daily order output of the current stage... Daily production demand The difference The following formula is used to calculate: ； In the formula, For the first The operating rate of electrical equipment in each production stage, where T is the total number of time periods. The scheduling period is [number].

6. The equipment start-up and operation rate adjustment method according to claim 1, which meets order requirements and low electricity costs, is characterized in that... In step S7, the period during which production needs to be reduced corresponds to the production reduction. and adjustment costs The following formula is used to calculate: ； ； In the formula, For the scheduling period, For the first Adjustment cost per unit power change of electrical equipment in each production stage For the first The electrical equipment in each production stage is in the first Power consumption during each time period For the first Electricity prices for specific time periods.

7. The equipment start-up and operation rate adjustment method according to claim 1, which meets order requirements and low electricity costs, is characterized in that... In step S7, the daily output constraint is expressed as follows: ； In the formula, This is the daily output constraint coefficient for the equipment.

8. A system for regulating equipment start-up, shutdown, and operating rate to meet order demands and achieve low electricity costs, characterized in that: include: The data acquisition module is used to collect information on the production processes and distribution of adjustable storage facilities in process-oriented enterprises, as well as the physical parameters of electrical equipment in each production process, the physical parameters of adjustable storage facilities, and electricity price data. The data processing module is configured to execute the equipment start-up and shutdown and operation rate adjustment method as described in any one of claims 1 to 7 to meet order requirements and low power costs, and to obtain the operation plan of all electrical equipment in the production process; The execution module is used to start, stop, and adjust the operating speed of electrical equipment in each production stage of a process-oriented enterprise according to the operating plan of all electrical equipment in the production process.

9. An electronic device, characterized in that, include: A memory on which computer programs or instructions are stored; A processor for loading and executing the computer program or instructions to implement the equipment start-up and operation rate adjustment method as described in any one of claims 1 to 7, which aims to meet order demands and reduce electricity costs.

10. A computer-readable storage medium having a computer program or instructions stored thereon, characterized in that, When the computer program or instructions are executed by the processor, they implement the equipment start-up and shutdown and operation rate adjustment method as described in any one of claims 1 to 7, which meets order requirements and low electricity costs.

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