Equipment start-stop and operation rate adjusting method and system capable of meeting order requirements and low in power consumption cost, equipment and medium

Abstract

The invention discloses an equipment start-stop and operation rate adjusting method, system, equipment and medium capable of meeting order requirements and low in power utilization cost, and the method comprises the steps: combining the power utilization equipment between adjacent reservoirs according to a production link and an adjustable reservoir distribution condition; secondly, aiming at the electric equipment of each production link, generating an equipment initial operation scheme which meets the daily output demand of the corresponding production link and has the lowest electric cost, and on the basis, gradually optimizing the scheme; and sequentially generating a scheme meeting the maximum continuous shutdown duration constraint, a scheme meeting the warehouse inventory constraint and a scheme with low operation cost to form an equipment operation scheme meeting the order demand. According to the invention, low power consumption cost and production order requirements of a production flow type enterprise are met through electric equipment turn stop control and operation rate adjustment, the contradiction between power supply and demand of the system is relieved, and the production benefit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of controlling equipment rotation stops in production process enterprises, and particularly relates to a method, system, equipment and medium for starting and stopping equipment and adjusting operation rates to meet order requirements and low electricity costs. Background Art

[0002] With the continuous increase in the grid connection ratio of clean energy and the electricity demand of users, the characteristics of its output uncertainty and discontinuity have become more obvious. During peak electricity demand periods, the supply pressure increases; while during low-demand periods, there is serious electricity waste. This imbalance between supply and demand exacerbates the operating pressure on the power system and poses higher requirements for ensuring the safety and stability of the power system. By motivating users to adjust their electricity consumption habits, including electricity consumption time and amount, demand response helps achieve flexible matching between electricity supply and demand, enhance the utilization efficiency of clean energy, and promote the sustainable development of energy. Production process enterprises such as cement and steel are mostly high-energy-consuming enterprises, and their production loads have the characteristics of strong adjustability and a large adjustment range, and are an important part of adjustable resources on the demand side. Studying the methods for starting and stopping equipment and adjusting operation rates in production process enterprises helps alleviate the contradiction between power supply and demand in the system, improve production efficiency, and reduce emissions. Summary of the Invention

[0003] The purpose of the present invention is to provide a method, system, equipment and medium for starting and stopping equipment and adjusting operation rates to meet order requirements and low electricity costs, so as to adjust the starting and stopping of equipment and its operation rates in production process enterprises, and thus alleviate the contradiction between power supply and demand in the system and improve production efficiency.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions.

[0005] In the first aspect, a method for starting and stopping equipment and adjusting operation rates to meet order requirements and low electricity costs is provided, including the following steps:

[0006] S1: Collect the production links and the distribution of adjustable storage warehouses in production process enterprises, and combine the electrical equipment in the production links between every two adjacent adjustable storage warehouses;

[0007] S2: Determine the daily output demand of a single production link ; Calculate the electrical equipment in the current production link Under the condition of running at the highest operation rate, calculate the minimum number of running periods to meet the daily output demand ; Based on the electricity price data, select the periods with the lowest electricity prices, and set the electrical equipment in the corresponding periods to the running state to form an initial equipment operation plan with the lowest electricity cost ;

[0008] S3: Scenario-based , select the number of consecutive periods of shutdown of electrical equipment, and construct a set of all consecutive shutdown durations ;

[0009] S4: From the scheme Read , compare the maximum number of continuous downtime periods of electrical equipment under the current solution The maximum number of consecutive downtime constraint periods ,like , the current solution is the solution that meets the maximum continuous downtime constraint , jump to step S5; if , revised plan In the state of power-consuming equipment, all continuous downtime periods greater than The state of the power-consuming equipment in the period with the lowest electricity price during the duration is set to the running state and run at the highest operating rate, and the collection is updated , re-execute step S4 until the maximum continuous downtime constraint is met, and form a solution that meets the maximum continuous downtime constraint ;

[0010] S5: Solution-based If the inventory of the outgoing storage in each period is greater than the minimum inventory warning value, the current plan is the plan that meets the storage inventory constraint. , jump to step S6; if the inventory of the discharge storage is less than the minimum inventory warning value, modify the plan The start and stop status of the device in the selection set During the period with the lowest electricity price, the power-consuming equipment in this period is set to the running state and runs at the highest operating rate, and the collection is updated. , re-execute step S5 until the storage inventory constraint is met, and form a solution that satisfies the storage inventory constraint ;

[0011] S6: From the scheme Read , based on electrical equipment The physical parameters of All the electrical equipment in the continuous downtime period is shut down and operates at the lowest speed. Working at the highest operating rate The operating costs under the three working states are calculated. The lowest cost state is selected to operate the electrical equipment to form a low operating cost solution. ;

[0012] S7: Solution-based The start and stop status of the equipment and its operation rate are used to calculate the daily order output of the current link. The difference from the daily output demand ; Reduce the output during the period when the electrical equipment operates at the highest operating rate, and calculate the reduced output when the rate is adjusted from the highest operating rate period to during the corresponding period, as well as the corresponding adjustment cost and the corresponding adjustment cost ; Among them where and are respectively the critical value of the operating rate of the electrical equipment and the lowest operating rate; Arrange in ascending order of adjustment cost to form a sequence of output reduction amounts ; The daily output reduction demand subtracts the output reduction amounts in the sequence in turn , and at the same time adjusts the operating rate of the electrical equipment during the corresponding period until the daily output constraint is met, and finally forms an equipment operation plan that meets the order demand ;

[0013] S8: For different electrical equipment, repeat steps S2 - S7 until the operation plans of all electrical equipment in the production process are formulated.

[0014] Furthermore, in step S2, the daily output demand of the i-th production link is calculated by the following formula:

[0015]

[0016] In the formula, is the daily order output demand of the production process-based enterprise, is the outgoing material loss rate of the j-th production link, and s represents the total number of production links;

[0017] The minimum number of operating periods to meet the daily output demand is calculated by the following formula:

[0018]

[0019] In the formula, is the highest operating rate of the electrical equipment in the -th production link, represents rounding down.

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

[0021]

[0022] In the formula, is the operating rate of the electrical equipment in the -th production link in the -th period, is the scheduling period, is the minimum inventory warning value of the discharge storage warehouse in the th production link, is the inventory of the electrical equipment in the th production link during the th period.

[0023] Furthermore, in step S6, the operating cost of the electrical equipment in the equipment shutdown state is calculated by the formula:

[0024]

[0025] where is composed of start-stop costs; and are respectively the start-up cost and shutdown cost of the electrical equipment in the th production link;

[0026] The operating cost of the electrical equipment operating at the lowest operation rate during the period is calculated by the formula:

[0027]

[0028] where is composed of speed regulation cost and electricity cost; is the adjustment cost of the unit power change of the electrical equipment in the th production link, and are respectively the maximum power consumption and minimum power consumption of the electrical equipment in the th production link, is the electricity price during the th period, is the scheduling period;

[0029] The operating cost of the electrical equipment operating at the highest operation rate during the period is calculated by the formula:

[0030]

[0031] where is composed of electricity cost.

[0032] Furthermore, in step S7, the difference between the daily order production volume and the daily production volume demand is calculated by the following formula:

[0033]

[0034] In the formula, is the operation rate of the electrical equipment in the th production link, T is the total number of time periods, is the scheduling period.

[0035] Furthermore, in step S7, the reduced production volume corresponding to the time period with reduced production volume and the adjustment cost are calculated by the following formula:

[0036]

[0037]

[0038] In the formula, is the scheduling period, is the adjustment cost of the unit power change of the electrical equipment in the th production link, is the electrical power consumption of the electrical equipment in the th production link at the th time period, is the electricity price at the th time period.

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

[0040]

[0041] In the formula, is the daily production volume constraint coefficient of the equipment.

[0042] On the second aspect, a system for adjusting the start / stop and operation rate of equipment to meet order requirements and low electricity cost is provided, including:

[0043] A data acquisition module, configured to acquire the distribution of production links and adjustable storage warehouses in a production process-based enterprise, as well as the physical parameters of electrical equipment in each production link, the physical parameters of adjustable storage warehouses, and electricity price data;

[0044] A data processing module, configured to execute the method for adjusting the start / stop and operation rate of equipment to meet order requirements and low electricity cost as described above to obtain the operation plans of all electrical equipment in the production process;

[0045] An execution module, configured to adjust the start / stop and operation rate of the electrical equipment in each production link of the production process-based enterprise according to the operation plans of all electrical equipment in the production process.

[0046] On the third aspect, an electronic device is provided, including:

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

[0048] A processor for loading and executing the computer program or instructions to implement the method for starting and stopping equipment and adjusting operation rate that meets order requirements and has low power consumption costs as described above.

[0049] In a fourth aspect, a computer-readable storage medium is provided, on which a computer program or instructions are stored, and when the computer program or instructions are executed by a processor, the method for starting and stopping equipment and adjusting operation rate that meets order requirements and has low power consumption costs as described above is implemented.

[0050] The present invention proposes a method, system, device and medium for starting and stopping equipment and adjusting operation rate that meet order requirements and have low power consumption costs. For the power-consuming equipment in each production link, an initial equipment operation plan with the lowest power consumption cost that meets the daily output demand of the corresponding production link is generated. On this basis, the plan is gradually optimized to successively generate a plan that meets the maximum continuous shutdown duration constraint, a plan that meets the storage inventory constraint, a plan with low operating costs, and form an equipment operation plan that meets order requirements. The present invention controls the wheel-stop of power-consuming equipment and adjusts its operation rate to meet the low power consumption cost and production order requirements of production process enterprises, which helps to alleviate the contradiction between power supply and demand in the system, improve production efficiency, and reduce emissions. Description of the Drawings

[0051] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0052] Figure 1 It is a flowchart of the method for starting and stopping equipment and adjusting operation rate that meets order requirements and has low power consumption costs provided by an embodiment of the present invention;

[0053] Figure 2 It is a production flowchart of a cement enterprise provided by an embodiment of the present invention;

[0054] Figure 3 It is an electricity price curve graph provided by an embodiment of the present invention;

[0055] Figure 4 It is a comparison graph of the electricity load curves of a cement enterprise under two schemes provided by an embodiment of the present invention;

[0056] Figure 5 It is a comparison graph of the crusher discharge rate curves under two schemes provided by an embodiment of the present invention;

[0057] Figure 6 It is a comparison chart of the discharge rate curves of the conveyor motor under two schemes provided by the embodiments of the present invention;

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

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

[0060] Figure 9 It is a comparison chart of the operating costs of cement enterprises under two schemes provided by the embodiments of the present invention. Detailed implementation manners

[0061] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope protected by the present invention.

[0062] As Figure 1 shown, the present invention provides a method for adjusting the start-stop and operation rate of equipment to meet order requirements and low power consumption costs, including the following steps:

[0063] S1: Collect the production links and the distribution of adjustable storage warehouses in a production process-type enterprise, merge the electrical equipment in the production links between every two adjacent adjustable storage warehouses, and record the electrical equipment involved in each production link after merging as , where s is the total number of links.

[0064] As Figure 2 shown, it is a production flow chart of a cement enterprise, where circles represent adjustable storage warehouses, and squares represent production links or the electrical equipment corresponding to production links. Normally, the raw material warehouse and the clinker warehouse are two adjacent adjustable storage warehouses, and there are three sub-production links of raw material preheating, clinker calcination and clinker cooling between the two. However, since there is no adjustable storage warehouse between these three sub-production links, these three sub-links need to run synchronously. Therefore, in this embodiment, for the convenience of generating adjustment schemes, these three sub-production links are merged into one clinker preparation link, that is, it means that the electrical equipment of the three links of raw material preheating, clinker calcination and clinker cooling are unified and merged into one clinker preparation electrical equipment.

[0065] S2: Collect the daily order demand of a production process-type enterprise and the discharge loss rate of each production link, construct a daily output demand model, and calculate the daily output demand of a single production link ; Collect the electrical equipment of the current link Based on the highest operation rate, construct the minimum operation duration model, and calculate the electrical equipment in the current production link Under the condition of running at the highest operation rate, the minimum number of operation periods to meet the daily output demand ; Based on the electricity price data obtained from the power trading center, select the periods with the lowest electricity price (if the electricity price data is 24-hour electricity price data, each period corresponds to one hour; if the electricity price data is 96-point electricity price data, each period corresponds to 15 minutes), and set the status of the electrical equipment to 1 to form the initial operation plan of the equipment with the lowest electricity cost ; Among them, the status of the electrical equipment takes values of 0 or 1. When its value is 0, it means the electrical equipment is in a shutdown state; when its value is 1, it means the electrical equipment is in an operating state. By first generating a plan that meets the daily output demand and has the lowest electricity cost as the basic plan and optimizing on this basis, the generation efficiency of the final plan can be improved.

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

[0067]

[0068] In the formula, is the daily output demand of the i-th production link: is the daily order output demand of the production process enterprise, is the outgoing material loss rate of the j-th production link, and s represents the total number of production links;

[0069] The minimum number of operation periods to meet the daily output demand is calculated by the following formula:

[0070]

[0071] In the formula, is the highest operation rate of the electrical equipment in the i-th production link, represents rounding down.

[0072] S3: Based on the plan , select the number of consecutive periods when the electrical equipment is in the shutdown state (i.e., ), starting from the period, determine the duration of the consecutive shutdown periods, denoted as , and place it in the set ; Further, place all the sets of consecutive shutdown durations in the set Among them is the maximum number of consecutive downtime periods of the current plan.

[0073] S4: Read from the plan and compare the maximum number of consecutive downtime periods of the electrical equipment under the current plan with the maximum number of consecutive downtime constraint periods . If , the current plan is the plan that meets the maximum consecutive downtime duration constraint , and jump to step S5; if , correct the status of the electrical equipment in the plan . Set the status of the electrical equipment in the time period with the lowest electricity price among all the durations where the number of consecutive downtime periods is greater than to 1 and run at the highest operating rate, update the set , and re-execute step S4 until the maximum consecutive downtime duration constraint is met, forming a plan that meets the maximum consecutive downtime duration constraint . By comparing the maximum number of consecutive downtime periods of the electrical equipment under the current plan with the maximum number of consecutive downtime constraint periods , the plan that does not meet the maximum consecutive downtime duration constraint is optimized. During the optimization process, the status of the electrical equipment in the time period with the lowest electricity price in the consecutive downtime period is still selected to ensure the lowest electricity cost while meeting the maximum consecutive downtime duration constraint as much as possible. with the maximum number of consecutive downtime constraint periods to optimize the plan that does not meet the maximum consecutive downtime duration constraint. During the optimization process, the status of the electrical equipment in the time period with the lowest electricity price in the consecutive downtime period is still selected to ensure the lowest electricity cost while meeting the maximum consecutive downtime duration constraint as much as possible. . By comparing the maximum number of consecutive downtime periods of the electrical equipment under the current plan with the maximum number of consecutive downtime constraint periods, the plan that does not meet the maximum consecutive downtime duration constraint is optimized. During the optimization process, the status of the electrical equipment in the time period with the lowest electricity price in the consecutive downtime period is still selected to ensure the lowest electricity cost while meeting the maximum consecutive downtime duration constraint as much as possible.

[0074] S5: Read from the plan and construct a storage inventory constraint model based on the inventory of the discharge storage of the electrical equipment and its minimum inventory warning value. Compare the inventory of the discharge storage in each period with the minimum inventory warning value starting from the initial moment; if the inventory of the discharge storage in each period is greater than the minimum inventory warning value, the current plan is the plan that meets the storage inventory constraint , and jump to step S6; if the inventory of the discharge storage is less than the minimum inventory warning value, correct the start-stop status of the equipment in the plan . Select the time period with the lowest electricity price in the set , set the status of the electrical equipment in this period to 1 and run at the highest operating rate, update the set , and re-execute step S5 until the storage inventory constraint is met, forming a plan that meets the storage inventory constraint . By constructing a storage inventory constraint model based on the inventory of the discharge storage of the electrical equipment and its minimum inventory warning value, and comparing the inventory of the discharge storage in each period with the minimum inventory warning value starting from the initial moment, the plan that does not meet the storage inventory constraint is optimized. During the optimization process, the status of the electrical equipment in the time period with the lowest electricity price is still selected to ensure the normal operation of the storage while meeting the storage inventory constraint as much as possible. When the inventory in the discharge storage bin is less than the minimum inventory warning value, optimize the plan that does not meet the storage bin inventory constraint. During the optimization process, still select to adjust the operating status of the electrical equipment during the period with the lowest electricity price in all continuous shutdown periods to ensure meeting the storage bin inventory constraint while minimizing the electricity cost as much as possible.

[0075] Among them, the storage bin inventory constraint model is expressed as follows:

[0076]

[0077] In the formula, is the operating rate of the electrical equipment in the th production link at the th period, is the scheduling period, is the minimum inventory warning value of the discharge storage bin in the th production link, is the inventory of the electrical equipment in the th production link at the th period.

[0078] S6: Read from the plan , and based on the physical parameters of the electrical equipment , including the operating rate, power consumption, etc., calculate the operating costs of the electrical equipment in the three states of equipment shutdown, operating at the lowest operating rate , and operating at the highest operating rate for all continuous shutdown durations in the set . Select the state with the lowest cost to operate the electrical equipment to form a plan with low operating cost. By comparing the operating costs in the three states, select the state with the lowest operating cost to adjust the plan, and minimize the operating cost as much as possible on the premise of ensuring the daily output demand.

[0079] In this embodiment, the operating cost of the electrical equipment in the equipment shutdown state is calculated by the formula:

[0080]

[0081] Among them, is composed of start-stop costs; and are respectively the start-up cost and shutdown cost of the electrical equipment in the th production link;

[0082] The operating cost when the electrical equipment operates at the lowest operating rate is calculated by the formula:

[0083]

[0084] Among them, It is composed of speed regulation cost and electricity consumption cost; is the adjustment cost of the unit power change of the electrical equipment in the th production link, and are respectively the maximum power consumption and the minimum power consumption of the electrical equipment in the th production link, is the electricity price in the th time period; is the scheduling period;

[0085] The operating cost of the electrical equipment running at the highest operating rate during the time period The calculation formula is:

[0086]

[0087] Among them, It is composed of electricity consumption cost.

[0088] S7: Based on the equipment start-stop state and its operating rate in the scheme, construct a daily output reduction demand model, calculate the difference between the current link's daily order output and the daily output demand ; Reduce the output during the time period when the electrical equipment runs at the highest operating rate, construct a daily output reduction model of the equipment and an adjustment cost model, calculate the reduced output and the corresponding adjustment cost when adjusted from the highest operating rate time period to , where and are respectively the critical value of the electrical equipment operating rate and the lowest operating rate; Arrange in ascending order of adjustment cost to form a sequence of output reduction amounts ; Construct a daily output constraint model, subtract the output reduction amounts in the sequence from the daily output reduction demand in turn, and at the same time adjust the operating rate of the electrical equipment in the corresponding time period until the daily output constraint is met, and finally form an equipment operation plan that meets the order demand. By minimizing the electricity consumption cost on the premise of ensuring that the daily output demand is met, the finally obtained plan can meet the order demand and low electricity consumption cost.

[0089] Among them, the daily output reduction demand model is expressed as follows:

[0090]

[0091] In the formula, is the operation rate of the electrical equipment in the th production link, T is the total number of time periods, is the scheduling period.

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

[0093]

[0094]

[0095] In the formula, is the scheduling period, is the adjustment cost of the unit power change of the electrical equipment in the th production link, is the electrical power consumption of the electrical equipment in the th production link in the th time period, is the electricity price in the th time period.

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

[0097]

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

[0099] S8: For different electrical equipment, according to the production link sequence corresponding to the production process, repeat steps S2 - S7 until the operation plans of all electrical equipment within the production process are formulated.

[0100] The method for adjusting the start - stop and operation rate of equipment to meet order requirements and low electricity costs provided by the above - mentioned embodiment generates an initial operation plan of the equipment with the lowest electricity cost that meets the daily output requirements of the corresponding production link for the electrical equipment in each production link. On this basis, the plan is gradually optimized to generate a plan that meets the maximum continuous shutdown duration constraint, a plan that meets the storage inventory constraint, a plan with low operating costs, and forms an equipment operation plan that meets order requirements. The present invention meets the low - electricity - cost and production order requirements of process - type enterprises through the control of the rotation stop of electrical equipment and the adjustment of its operation rate, helps to alleviate the contradiction between power supply and demand in the system, improve production efficiency, and reduce emissions.

[0101] The embodiment of the present invention also provides a system for adjusting the start - stop and operation rate of equipment to meet order requirements and low electricity costs, including:

[0102] A data acquisition module, configured to acquire the production links and the distribution of adjustable storage warehouses in a production process-based enterprise, as well as the physical parameters of the electrical equipment in each production link (including power consumption, operation rate, daily production demand, etc.), the physical parameters of the adjustable storage warehouses (including the inventory level and the minimum inventory warning value, etc.), and electricity price data (24-point electricity price data or 96-point electricity price data);

[0103] A data processing module, configured to execute the equipment start-stop and operation rate adjustment method for meeting order requirements and low electricity costs as described above, and obtain the operation plans of all electrical equipment in the production process;

[0104] An execution module, configured to adjust the start-stop and operation rate of the electrical equipment in each production link of the production process-based enterprise according to the operation plans of all electrical equipment in the production process.

[0105] An embodiment of the present invention also provides an electronic device, including:

[0106] A memory, on which a computer program or instruction is stored;

[0107] A processor, configured to load and execute the computer program or instruction to implement the equipment start-stop and operation rate adjustment method for meeting order requirements and low electricity costs as described above.

[0108] An embodiment of the present invention also provides a computer-readable storage medium, on which a computer program or instruction is stored, and when the computer program or instruction is executed by a processor, the equipment start-stop and operation rate adjustment method for meeting order requirements and low electricity costs as described above is implemented.

[0109] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the content not detailed in some embodiments can be seen in the same or similar content in other embodiments.

[0110] Next, a cement enterprise is selected as a typical production process-based enterprise for a case study to further illustrate the effect of the technical solution of the present invention.

[0111] It is assumed that the daily output of the cement enterprise is 5000 tons and the electricity consumption capacity is 45000 kW; the physical parameters of the cement plant and the parameters of the cement storage equipment are shown in Table 1 and Table 2 respectively. The real-time electricity price curve is as Figure 3 shown. Two types of schemes are selected for comparative calculation: Scheme 1: Arrange the production equipment plan according to the product order demand under a fixed electricity price; Scheme 2: Under the real-time electricity price, the enterprise arranges the production equipment plan by using the equipment start-stop and operation rate adjustment method.

[0112]

[0113]

[0114] The electricity load curves of cement enterprises under Plan 1 and Plan 2 are as Figure 4 shown, and the comparison diagrams of the discharge rate curves of crushers, conveyor motors, raw material mills, and clinker mills are as Figures 5 - 8 shown. The production equipment under Plan 1 operates at a constant power and uniform speed according to the daily output requirement. Due to insufficient visibility at night, there are potential safety hazards in the operation of the crushing and transportation links, and the equipment working hours are set from 7:00 to 19:00. Therefore, the crusher and conveyor motor operate at a constant power with discharge speeds of 429 t / h and 215 t / h respectively during the working hours to meet the daily output requirement. The raw material mill and the clinker mill operate throughout the day and operate at a constant power with discharge speeds of 236 t / h and 215 t / h respectively at all times. Under this plan, the user has a relatively high electricity load during the working hours of 7:00 - 19:00 in the crushing and transportation links and the lowest electricity load during other hours.

[0115] After adopting the equipment start-stop and operation rate adjustment method under real-time electricity prices in Plan 2, by reducing the discharge speed and operating the production equipment at a low power during multiple peak hours, the ability to cut the load during peak hours is improved under the condition of meeting the production order requirement. The raw material mill and the clinker mill change from the shutdown state to operate at the lowest discharge speeds of 114 t / h and 103.5 t / h at 11:00, reducing the highest load during the peak hour from 48.73 MW to 26.02 MW, with a decrease of 46.6%. In terms of the enterprise operation cost, as Figure 9 shown, Plan 2 incurs an additional start-stop cost of 35,000 yuan and a speed regulation cost of 5,300 yuan, but the enterprise's electricity cost decreases by 215,700 yuan, and the total cost decreases by 175,400 yuan.

[0116] Those skilled in the art should understand that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented 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 the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, as well as the combination of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices produce means for implementing the functions specified in the Figure 1 one or more flows and / or blocks Figure 1 means for implementing the functions specified in one or more blocks.

[0118] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory produce a manufactured article including instruction means for implementing the functions specified in the Figure 1 one or more flows and / or blocks Figure 1 means for implementing the functions specified in one or more blocks.

[0119] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in the Figure 1 one or more flows and / or blocks Figure 1 means for implementing the functions specified in one or more blocks.

[0120] Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill 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 starting and stopping equipment and adjusting the operation rate to meet order requirements and low electricity costs, characterized in that: The steps include: S1: Collect the distribution of production links and adjustable storage tanks of production process enterprises, and merge the power-consuming equipment in the production links between all two adjacent adjustable storage tanks; S2: Determine the daily output demand of a single production link ; Calculate the current electricity consumption of production equipment The minimum number of operating hours required to meet daily production requirements under the condition of maximum operating rate ; Based on the electricity price data, select the lowest electricity price Time period, the corresponding time period of electrical equipment Set to running state to form the initial operation plan of the equipment with the lowest electricity cost ; S3: Scenario-based , select the number of consecutive periods of shutdown of electrical equipment, and construct a set of all consecutive shutdown durations ; S4: From the scheme Read , compare the maximum number of continuous downtime periods of electrical equipment under the current solution and the maximum number of consecutive downtime constraint periods ,like , the current solution is the solution that meets the maximum continuous downtime constraint , jump to step S5; if , revised plan In the state of power-consuming equipment, all continuous downtime periods greater than The state of the power-consuming equipment in the period with the lowest electricity price during the duration is set to the running state and run at the highest operating rate, and the collection is updated , re-execute step S4 until the maximum continuous downtime constraint is met, and form a solution that meets the maximum continuous downtime constraint ; S5: Solution-based If the inventory of the outgoing storage in each period is greater than the minimum inventory warning value, the current plan is the plan that meets the storage inventory constraint. , jump to step S6; If the inventory of the discharge storage is less than the minimum inventory warning value, the correction plan The start and stop status of the device in the selection set During the period with the lowest electricity price, the power-consuming equipment in this period is set to the running state and runs at the highest operating rate, and the collection is updated. , re-execute step S5 until the storage inventory constraint is met, and form a solution that satisfies the storage inventory constraint ; S6: From the scheme Read , based on electrical equipment The physical parameters of All the electrical equipment in the continuous downtime period is shut down and operates at the lowest speed. Working at the highest operating rate The operating costs under the three working states are calculated. The lowest cost state is selected to operate the electrical equipment to form a low operating cost solution. ; S7: Solution-based The start and stop status of the equipment and its operation rate are used to calculate the daily order output of the current link. Daily production demand The difference ; Reduce the output of electrical equipment during the period of operation at the highest operating rate, and calculate the corresponding period from the highest operating rate period to Reduced production and corresponding adjustment costs ,in and They are the critical value and minimum operating rate of the power equipment respectively; according to the adjustment cost from low to high, the output reduction is formed Sequence; daily production reduction demand Subtract the decrease in production in the sequence At the same time, adjust the operating rate of the power-consuming equipment in the corresponding period until the daily output constraints are met, and finally form an equipment operation plan that meets the order requirements ; S8: Repeat steps S2-S7 for different power-consuming equipment until the operation plan for all power-consuming equipment in the production process is completed.

2. The method for starting and stopping equipment and adjusting the operation rate to meet order requirements and low electricity costs according to claim 1 is characterized in that: In step S2, the daily output demand of the i-th production link is Calculated by the following formula: ； In the formula, For the daily order output demand of production process enterprises, is the material loss rate of the jth production link, and s represents the total number of production links; Minimum number of operating hours to meet daily production requirements Calculated by the following formula: ； In the formula, For the The maximum operating speed of electrical equipment in each production link, Indicates rounding down.

3. The method for starting and stopping equipment and adjusting the operation rate to meet order requirements and low electricity costs according to claim 1 is characterized in that: In step S5, the storage inventory constraint is expressed as follows: ； In the formula, For the The electrical equipment in the production link is The operation rate of each period, is the scheduling period, For the The minimum inventory warning value of the outflow storage in each production link, For the The electrical equipment in the production link is The inventory quantity for a period of time.

4. The method for starting and stopping equipment and adjusting the operation rate to meet order requirements and low electricity costs according to claim 1 is characterized in that: In step S6, the operating cost of the electrical equipment when the equipment is shut down The calculation formula is: ； in, It is composed of start-stop costs; and Respectively The start-up and shutdown costs of electrical equipment in each production link; The electrical equipment is running at the lowest operating rate Operating cost per period The calculation formula is: ； in, It is composed of speed regulation cost and electricity cost; For the The adjustment cost of the unit power change of the electrical equipment in each production link, and Respectively The maximum and minimum power consumption of electrical equipment in each production link, For the Electricity price for each period, is the scheduling period; Electrical equipment is running at the highest operating rate Operating cost per period The calculation formula is: ； in, It is composed of electricity cost.

5. The method for starting and stopping equipment and adjusting the operation rate to meet order requirements and low electricity costs according to claim 1, characterized in that: In step S7, the daily order output of the current link Daily production demand The difference Calculated by the following formula: ； In the formula, For the The operating rate of the electrical equipment in each production link, T is the total number of time periods, The scheduling cycle.

6. The method for starting and stopping equipment and adjusting the operation rate to meet order requirements and low electricity costs according to claim 1 is characterized in that: In step S7, the period of time during which the output needs to be reduced corresponds to the reduced output and adjustment costs Calculated by the following formula: ； ； In the formula, is the scheduling period, For the The adjustment cost of the unit power change of the electrical equipment in each production link, For the The electrical equipment in the production link is The power consumption in each period, For the Electricity price for each period.

7. The method for starting and stopping equipment and adjusting the operation rate to meet order requirements and low electricity costs according to claim 1, characterized in that: In step S7, the daily production constraint is expressed as follows: ； In the formula, is the daily output constraint coefficient of the equipment.

8. A system for starting and stopping equipment and regulating operation rate to meet order requirements and low electricity costs, characterized in that: include: The data collection module is used to collect the distribution of production links and adjustable storage tanks of production process enterprises, as well as the physical parameters of electrical equipment in each production link, the physical parameters of adjustable storage tanks and electricity price data; A data processing module, configured to execute the equipment start-stop and operation rate adjustment method that meets order requirements and has low electricity costs as described in any one of claims 1 to 7, and obtain an operation plan for all electrical equipment in the production process; The execution module is used to start and stop the power-consuming equipment in each production link of the production process enterprise and adjust the operation rate according to the operation plan of all power-consuming equipment in the production process.

9. An electronic device, characterized in that: include: Memory on which computer programs or instructions are stored; A processor is used to load and execute the computer program or instructions to implement the equipment start-stop and operation rate adjustment method that meets order requirements and low electricity costs as described in any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed by the processor, the method for starting and stopping equipment and adjusting the operating rate to meet order requirements and low electricity costs as described in any one of claims 1 to 7 is implemented.

Images