Power regulation method and system for cement enterprise load
By constructing an adjustable load potential model and combining it with the interruption or start-up of cement and raw material mills, the problem of high load regulation costs for cement enterprises has been solved, the economy and production efficiency of load regulation have been improved, and the stability of the power grid has been promoted.
Patent Information
- Application Number
- CN202010520602.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-06-09
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2040-06-09
AI Technical Summary
In existing technologies, the adjustment costs of adjustable load potential research in cement enterprises are high, leading to waste of energy and production costs, and there is a lack of effective load adjustment methods.
An adjustable load potential model is constructed. By interrupting or starting the cement mill, raw material mill, and both simultaneously, the duration of different load interruptions is calculated. Load adjustment is then performed based on the method with the lowest operating cost. The model solution module, cost calculation module, and power adjustment module are combined for systematic management.
It tapped the adjustable load potential of cement enterprises, reduced adjustment costs, guided cement enterprises to participate in demand response, improved production efficiency, helped the power grid smooth the load curve, and enhanced power grid security.
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Figure CN113781253B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the field of adjustable load potential and load adjustment economic cost analysis, and relates to a power regulation method and system for cement enterprise load. BACKGROUND
[0002] The continuous development of smart grid and the gradual implementation of demand response promote the attention of power users to their adjustable load resources. Industrial electricity consumption accounts for a large proportion of total social electricity consumption in China, about 70%, and industrial users have advantages such as large response capacity, stable load and high automation level compared with commercial and residential users, and have a good foundation for smart power management, which is the most important demand side resource in the power system. The cement industry is a major energy consumer among industrial users. For example, in China, the electricity consumption of the cement industry accounted for 2% of the total social electricity consumption in 2018, and it also has abundant adjustable load resources, among which the load proportion of raw mill and cement mill reaches 70%, and the theoretical adjustable potential of the two devices reaches 100%. Demand response for cement enterprises is operable and has observable effects. When developing a demand response plan, factors such as types of electricity-consuming equipment (adjustable load), process flow, production requirements, worker management, production safety, and production cost need to be considered. Based on the above factors, the adjustable load potential of the cement enterprise and the economic cost of adjustment are analyzed, which are the basis for carrying out demand response business.
[0003] At present, the cement enterprise does not play a role in promoting the balance of power generation, power supply and power consumption for the power grid, resulting in waste of energy and production cost, so it is necessary to study the adjustable load potential and cost analysis method of demand response for cement enterprises in combination with the electricity consumption characteristics of cement enterprises. SUMMARY
[0004] In view of the problem of high adjustable load potential model research and adjustment cost for industrial electricity, especially for the adjustable load potential of cement enterprises, the present application provides a power regulation method for cement enterprise load, which comprises:
[0005] The electricity consumption data and production data of the cement enterprise are brought into the pre-constructed adjustable load potential model to obtain multiple power regulation modes and the duration under each power regulation mode;
[0006] Based on the duration and electricity cost under each power regulation mode, the operating cost of the equipment under each power regulation mode is calculated;
[0007] The power regulation mode with the minimum operating cost is used for power regulation of the cement enterprise load;
[0008] The adjustable load potential model is constructed by different load interruption durations of the power regulation mode of interrupting the raw mill, interrupting the cement mill and / or starting the cement mill.
[0009] Preferably, the power regulation mode comprises: interrupting the raw mill, interrupting the cement mill, starting the cement mill and interrupting the raw mill and the cement mill simultaneously.
[0010] Preferably, the construction of the adjustable load potential model comprises:
[0011] When the power regulation mode is interrupting the raw mill, the raw mill interruption duration is calculated based on the raw material consumption, the storage amount of the raw material bin and the storage amount of the clinker bin as constraints, and the running power of the rotary kiln, the power consumption per unit of clinker and the raw material consumption per unit of clinker of the rotary kiln.
[0012] When the power regulation mode is interrupting the cement mill, the cement mill interruption duration is calculated based on the running power of the rotary kiln and the power consumption per unit of clinker.
[0013] When the power regulation mode is starting the cement mill, the cement mill continuous running time is calculated based on the running power of the cement mill, the power consumption per unit of cement, the running power of the rotary kiln and the power consumption per unit of clinker of the rotary kiln.
[0014] When the power regulation mode is interrupting the raw mill and the cement mill simultaneously, the raw mill interruption duration and the cement mill interruption duration are calculated based on the running power of the rotary kiln, the power consumption per unit of clinker and the raw material consumption per unit of clinker of the rotary kiln.
[0015] Preferably, when the power regulation mode is interrupting the raw mill, the calculation formula of the raw mill interruption duration is as follows:
[0016]
[0017] Q r，min ≤Q r0 -Q rc ≤Q r，max
[0018] In the formula, P r (t) is the running power of the rotary kiln at the interruption time t; η clinker is the power consumption per unit of clinker; SC raw is the raw material consumption per unit of clinker of the rotary kiln; t dr is the raw mill interruption duration; Q rc is the raw material consumption; Q r0 is the raw material storage amount of the raw material bin at the interruption time; Q r，min is the minimum storage amount of the raw material bin; Qr，max is the maximum storage of the raw material silo.
[0019] Preferably, when the power regulation mode is to interrupt the cement mill, the calculation formula of the interruption duration of the cement mill is as follows:
[0020]
[0021] Q c，min ≤Q c0 +Q cp ≤Q c，max
[0022] In the formula, t dc is the interruption duration of the cement mill; Q cp is the clinker production; Q c0 is the clinker storage of the clinker silo at the interruption moment; Q c，min is the minimum storage of the clinker silo; Q c，max is the maximum storage of the clinker silo.
[0023] Preferably, when the power regulation mode is to start the cement mill, the calculation formula of the continuous operation duration of the cement mill is as follows:
[0024]
[0025]
[0026] Q c，min ≤Q′ c0 +Q cp -Q cc ≤Q c，max
[0027] In the formula, P c (t) is the operation power of the cement mill in the period of time t at the starting moment; η cement is the power consumption per unit of cement in production; t sc is the continuous operation duration of the cement mill; Q' c0 is the clinker storage of the clinker silo at the starting moment; Q cc is the clinker consumption; SC clinker is the clinker consumption per unit of cement in production of the cement mill.
[0028] Preferably, when the power regulation mode is to interrupt the raw mill and the cement mill simultaneously, the calculation formula of the interruption duration of the raw mill and the interruption duration of the cement mill is as follows:
[0029]
[0030] Q r，min ≤Q r0 -Q rc ≤Q r，max
[0031]
[0032] Q c，min ≤Q c0 +Q cp ≤Q c，max .
[0033] Preferably, the running cost of the equipment in each power adjustment mode is calculated based on the duration and power cost in each power adjustment mode, comprising:
[0034] The fixed cost of the cement enterprise to adjust the load is calculated based on the pre-obtained automation degree of the cement enterprise in various power adjustment modes;
[0035] The variable cost of the cement enterprise is calculated based on the actual power at the equipment interruption time, the running power of the cement mill at the cement mill startup time, and the duration in the different power adjustment modes.
[0036] Preferably, the variable cost of the cement enterprise is calculated based on the actual power at the equipment interruption time, the running power of the cement mill at the cement mill startup time, and the duration in the different power adjustment modes, comprising:
[0037] When the power adjustment mode is any one of interrupting the raw mill, interrupting the cement mill, and simultaneously interrupting the raw mill or the cement mill, the variable cost of the cement enterprise participating in the downward adjustment is calculated based on the actual power at the raw mill or the cement mill interruption time and the interruption.
[0038] When the power adjustment mode is starting up the cement mill, the variable cost of the cement enterprise participating in the upward adjustment is calculated based on the running power of the cement mill at the cement mill startup time.
[0039] Preferably, the variable cost of the cement enterprise participating in the downward adjustment is calculated as follows:
[0040]
[0041] wherein, is the variable cost of the cement enterprise participating in the downward adjustment, F v is the loss of load unit value, P i (t) is the actual power of the equipment raw mill or cement mill i at the t period, t dr is the interruption duration of the raw mill or the cement mill.
[0042] Preferably, the variable cost of the cement enterprise participating in the upward adjustment is calculated as follows:
[0043]
[0044] wherein, F is the variable cost of the cement enterprise participating in upward adjustment, E F is the new electricity cost of the cement enterprise, re F is the cement mill maintenance cost per unit power consumption of the power equipment of the enterprise, st t is the cost of the increase of the unit power consumption of the power equipment of the enterprise, sc P is the continuous running time of the cement mill, c (t) is the running power of the cement mill at the starting moment of the t period.
[0045] Based on the same concept, the application provides a power regulation system for the load of a cement enterprise, comprising a model solving module, a cost calculation module and a power regulation module;
[0046] The model solving module is used for bringing the power consumption data and production data of the cement enterprise into a pre-constructed adjustable load potential model to obtain multiple power regulation modes and the duration under each power regulation mode.
[0047] The cost calculation module is used for calculating the running cost of the equipment under each power regulation mode based on the duration under each power regulation mode and the power consumption cost.
[0048] The power regulation module is used for regulating the power of the load of the cement enterprise in the power regulation mode with the minimum running cost.
[0049] The adjustable load potential model is constructed by different load interruption durations obtained by the power regulation modes of starting the cement mill, interrupting the raw mill and / or interrupting the cement mill.
[0050] Compared with the prior art, the application has the following beneficial effects:
[0051] 1. The application provides a power regulation method for the load of a cement enterprise, comprising the following steps: bringing the power consumption data and production data of the cement enterprise into a pre-constructed adjustable load potential model to obtain multiple power regulation modes and the duration under each power regulation mode; calculating the running cost of the equipment under each power regulation mode based on the duration under each power regulation mode and the power consumption cost; and regulating the power of the load of the cement enterprise in the power regulation mode with the minimum running cost. The adjustable load potential model is constructed by different load interruption durations obtained by the power regulation modes of starting the cement mill, interrupting the raw mill and / or interrupting the cement mill. Based on the power consumption load characteristics of the cement enterprise, the adjustable load potential of the cement enterprise is excavated, and the cost of the participation of the cement enterprise in demand response is analyzed, so that the scheme of the participation of the cement enterprise in demand response is facilitated to be made, the off-peak production of the cement enterprise is guided, the production benefit is improved, the load curve of the power grid is helped to be stabilized, and the safety guarantee level of the power grid is improved.
[0052] 2. The application provides a power regulation method and system for cement enterprise load, which provides reference for other kinds of industrial users to carry out similar demand response business, promotes flexible interaction between industrial users and power grid, and improves the benefits of both parties. BRIEF DESCRIPTION OF DRAWINGS
[0053] Figure 1 A flow chart of the power regulation method for the cement enterprise load provided by the application is provided.
[0054] Figure 2 A flow chart of the adjustable load potential and cost analysis method for the cement enterprise provided by the embodiment of the application is provided.
[0055] Figure 3 A structure diagram of the power regulation system for the cement enterprise load provided by the embodiment of the application is provided. DETAILED DESCRIPTION
[0056] The embodiments of the application are further described in combination with the drawings.
[0057] Embodiment 1:
[0058] The application provides a power regulation method for cement enterprise load, which is convenient for formulating a demand response scheme for the cement enterprise to provide reference, is conducive to smooth load curve, and protects the stability of the power grid. Figure 1 As shown in the figure, the method comprises the following steps:
[0059] Step 1: The power regulation method and the duration of each power regulation method are obtained by bringing the power consumption data and production data of the cement enterprise into the pre-constructed adjustable load potential model.
[0060] Step 2: The operation cost of the equipment under each power regulation method is calculated based on the duration and power consumption cost under each power regulation method.
[0061] Step 3: The power regulation of the cement enterprise load is performed in the power regulation method with the minimum operation cost.
[0062] The specific process is shown in the figure. Figure 2
[0063] Step 1: The power regulation method and the duration of each power regulation method are obtained by bringing the power consumption data and production data of the cement enterprise into the pre-constructed adjustable load potential model.
[0064] The related data and production data of the power consumption load of the cement enterprise are obtained.
[0065] The power consumption load data of the cement enterprise is obtained, including the load quantity M and the load power P r (t), power consumption per unit time η clinker ;
[0066] Obtain the production data of the cement enterprise, including the maximum material storage capacity Q c，max , the minimum material storage capacity Q c，min , and the material consumption per unit time Q rc .
[0067] Obtain the load regulation performance parameters of the cement enterprise, including the load interruption duration T dc .
[0068] The cement enterprise data includes: the power load data of the cement enterprise: the load quantity, the load power, and the power consumption per unit time;
[0069] The cement enterprise production data: the maximum material storage capacity of the equipment, the minimum material storage capacity of the equipment, and the material consumption per unit time;
[0070] The load regulation performance parameters: the load interruption duration.
[0071] Determine the working state of the equipment based on the actual power of the equipment and the rated power of the equipment. Classify the power load of the cement enterprise;
[0072] Classify the M load equipment of the cement enterprise. The specific classification method is: first, classify the power load of the cement enterprise into production load and non-production load. The production load includes the mixer of the slurry tank, the rotary kiln, the raw mill, the cement mill, and other power equipment with special production purposes. The non-production load includes lighting equipment, air conditioning, and other commonly used power equipment. Second, classify the production load into primary load and secondary load. The primary load mainly includes the mixer of the slurry tank, the rotary kiln, and other equipment. The power supply cannot be arbitrarily interrupted, otherwise it will cause damage to the key equipment and complete scrap of the product, etc. The secondary load mainly includes the raw mill, the cement mill, and other equipment. It has the potential to be interrupted and will not cause significant economic losses to the enterprise production and operation.
[0073] Develop a controllable load power control method for the cement enterprise;
[0074] Establish a power consumption characteristic model of the cement enterprise. Plan to control the controllable equipment within 24 hours a day. Introduce the variable x i (t) represents the working condition of equipment i at time t. Because the control of the controllable load of the cement enterprise mainly gives the on or off state of the equipment at different times to realize the load change, its expression is:
[0075] P i (t) = P e × x i (t)
[0076] P e is the rated power of the device, P i (t) is the actual power of device i at time period t, x i (t) is the working state of the power-using device i at time period t.
[0077] Based on the power-using characteristics, considering that the raw material mill and the cement mill are both provided with a material bin, and the interruption of other process links for a short time has less influence, the regulation method of the active power of the cement load includes: interrupting the raw material mill to regulate power, starting and stopping the cement mill to regulate power, and interrupting the raw material mill and the cement mill at the same time to regulate power.
[0078] According to the control method and the constraint condition, a model of the adjustable load potential of the cement enterprise is constructed;
[0079] According to the following power regulation, the power regulation with the minimum cost is selected:
[0080] Interruption of the raw material mill to regulate power: considering that the storage capacity of the raw material bin is limited, once the interruption time is too long, the rotary kiln will have no material to feed, thereby causing the rotary kiln to be forced to stop running, resulting in serious safety hazards and economic losses, therefore, the interruption time of the raw material mill is limited by the storage capacity of the raw material bin, and the expression is:
[0081]
[0082] Q r，min ≤Q r0 -Q rc ≤Q r，max
[0083] P r (t) is the running power of the rotary kiln at time period t (relative to the interruption time); η clinker is the power consumption per unit of clinker; SC raw is the raw material consumption per unit of clinker consumed by the rotary kiln; t dr is the interruption duration of the raw material mill; Q rc is the raw material consumption; Q r0 is the raw material storage of the raw material bin at the interruption time; Q r，min is the minimum storage of the raw material bin; Q r，max is the maximum storage of the raw material bin.
[0084] For the raw material consumption of the raw mill, i.e. the amount of raw material obtained by the raw mill (as it is a continuous process), when the raw mill power is reduced (the change of power P is the cause of the amount of raw material in the raw mill), the raw mill stops producing cement raw material to the raw mill, but since the raw mill itself stores a certain amount of raw material, it can continue to provide raw material to the rotary kiln for a period of time without causing serious impact on production. During this process, the power of the rotary kiln does not change.
[0085] Start and stop the cement mill for power regulation:
[0086] (a) Interrupt the cement mill for power regulation
[0087] Considering that the storage capacity of the clinker silo is limited, if the interruption time is too long, it will lead to the clinker produced by the rotary kiln having no place to be stored, thereby causing the rotary kiln to be forced to stop running, resulting in serious safety hazards and economic losses. Therefore, the interruption time of the cement mill is limited by the storage capacity of the clinker silo, and its expression is:
[0088]
[0089] Q c，min ≤Q c0 +Q cp ≤Q c，max
[0090] Where t dc is the duration of the interruption of the cement mill; Q cp is the clinker production; Q c0 is the clinker storage of the clinker silo at the interruption time; Q c，min is the minimum storage of the clinker silo; Q c，max is the maximum storage of the clinker silo.
[0091] (b) Start the cement mill for power regulation
[0092] Considering that the cement mill equipment has a higher power only when it grinds clinker, and a lower actual power when it is running empty, and that it will have a greater impact on the service life of the equipment and the safety of electricity use, therefore, the valley filling operation time of the cement mill is limited by the clinker storage, and its expression is:
[0093]
[0094]
[0095] Q c，min ≤Q′ c0 +Q cp -Q cc ≤Q c，max
[0096] Where, P c(t) is the running power of the cement mill at time t (relative to the starting time); η cement is the power consumption per unit of cement produced; t sc is the continuous running time of the cement mill; Q' c0 is the clinker inventory of the clinker silo at the starting time; Q cc is the clinker consumption; SC clinker is the amount of clinker consumed per unit of cement produced by the cement mill.
[0097] Simultaneous interruption of the raw mill and the cement mill for power adjustment:
[0098] Since both the raw mill and the cement mill have interruptible potential, and the connection between the two in the production process is weak, simultaneous interruption of the raw mill and the cement mill can achieve the purpose of load reduction.
[0099] Step 2: Calculate the operating cost of the device under each power adjustment mode based on the duration and electricity cost under each power adjustment mode, specifically including:
[0100] Combine the adjustable load potential model to conduct cost analysis and build a demand response cost analysis model;
[0101] Obtain the automation level of the cement enterprise and calculate the fixed cost of load adjustment of the cement enterprise. The economic cost of load adjustment of the cement enterprise mainly includes fixed cost and variable cost. The fixed cost is the one-time investment cost of controller modification and control device, and its specific value needs to be determined according to the automation level of enterprise production; the variable cost is a measure of the impact on industrial production during the industrial load power adjustment process.
[0102] Calculate the variable cost of load adjustment of the cement enterprise, and the calculation method is as follows:
[0103] (a) Variable cost when the cement enterprise participates in downward adjustment:
[0104] For the adjustment corresponding to the interruption of the cement enterprise power downward adjustment, since the interruption of the raw mill only affects the amount of raw material preparation and the inventory of the raw material silo, the interruption duration has little impact on cement production under the limitation of the raw material silo storage; but the interruption of the cement mill will directly affect the output of the final product cement, thereby causing load value loss, and the unit value loss F v is as follows:
[0105] F v = (F p -F c ) / C E
[0106] Wherein, F v is the load unit value loss (yuan / kWh); F pThe unit price of cement (yuan / ton); F c The unit cost of cement production (yuan / ton); C E The power consumption for producing unit cement (kWh / ton).
[0107] Therefore, based on the adjustable load model, the variable cost of the cement enterprise participating in downward adjustment is:
[0108]
[0109] Wherein, The variable cost of the cement enterprise participating in downward adjustment, P i (t) is the actual power of the device (raw mill or cement mill) i at time t, t dr The duration of the raw mill interruption.
[0110] (b) Variable cost when the cement enterprise participates in upward adjustment:
[0111] The cement enterprise can start the cement mill to realize the upward adjustment of the power of the cement enterprise. Considering the limitations of the production plan and the influence of the cement price, the short-time start of the cement mill cannot bring too much change to the enterprise value, but due to the insufficient storage of clinker in the clinker warehouse, the cement mill is in an under-load operation state at this time, and the power production efficiency η (the ratio of the power consumption of the cement mill for producing unit cement under normal production to the power consumption of the cement mill for producing unit cement under under-load operation) is obviously reduced, thereby additionally increasing the power cost F E The following formula is used for calculation:
[0112] F E =(1-η)×Pr E ×k
[0113] Wherein, F E The additional power cost of the cement enterprise (yuan / kWh); Pr E The electricity price (yuan / kWh); k is the proportion of the cement mill capacity to the total capacity of the enterprise power equipment.
[0114] In addition, due to the under-load operation of the cement mill, the failure rate of the equipment is increased, and the life of the equipment is affected. The maintenance cost of the cement mill converted to the unit power consumption of the enterprise power equipment is F re , which can be solved by the following formula:
[0115]
[0116] Wherein, λ is the maintenance cost of the equipment (yuan); τ N The rated maintenance life (h); τ u The life of the equipment under under-load operation; P N The total capacity of the power equipment of the cement enterprise.
[0117] Considering that the cement mill startup also has costs, which are mainly composed of the cost of the long empty running of the cement mill during the startup process for half an hour, the human and management costs caused by the production plan adjustment, and the cost converted to the increase of the unit power consumption of the power consumption equipment of the enterprise is:
[0118]
[0119] Wherein, C start is the startup cost of the cement mill equipment (yuan); n is the number of valley filling responses in a year; E N is the annual power consumption of the cement enterprise.
[0120] Then, based on the adjustable load model, the variable cost of the cement enterprise participating in upward adjustment is:
[0121]
[0122] Wherein, is the variable cost of the cement enterprise participating in upward adjustment, P c (t) is the running power of the cement mill at the t period (relative to the startup time), t sc is the continuous running time of the cement mill.
[0123] Step 3: The power regulation of the cement enterprise load is carried out in the power regulation mode with the minimum running cost, which specifically includes:
[0124] According to the power regulation of interrupting the raw mill, starting and stopping the cement mill and interrupting the raw mill and the cement mill at the same time, the power regulation with the minimum cost is selected.
[0125] Embodiment 2:
[0126] Based on the same concept, the application provides a power regulation system of a cement enterprise load, which is introduced in combination with Figure 3 the system structure diagram, which includes a model solving module, a cost calculation module and a power regulation module;
[0127] The model solving module is used to bring the power consumption data and production data of the cement enterprise into the pre-constructed adjustable load potential model to obtain multiple power regulation modes and the continuous time under various power regulation modes.
[0128] The cost calculation module is used to calculate the running cost of the equipment under each power regulation mode based on the continuous time under each power regulation mode and the power consumption cost.
[0129] The power regulation module is used to carry out the power regulation of the cement enterprise load in the power regulation mode with the minimum running cost.
[0130] The adjustable load potential model is constructed by different load interruption durations in the power regulation mode of starting the cement mill, interrupting the raw material mill and / or interrupting the cement mill.
[0131] Preferably, the model solving module comprises a raw material mill interruption submodule, a cement mill interruption submodule, a cement mill starting submodule and a simultaneous interruption submodule.
[0132] The raw material mill interruption submodule is configured to, when the power regulation mode is interrupting the raw material mill, interrupt the raw material mill based on the raw material consumption, with the storage amount of the raw material bin and the storage amount of the clinker bin as constraints, and calculate the interruption duration of the raw material mill based on the running power of the rotary kiln, the power consumption per unit of clinker and the raw material consumption per unit of clinker of the rotary kiln.
[0133] The cement mill interruption submodule is configured to, when the power regulation mode is interrupting the cement mill, calculate the interruption duration of the cement mill based on the running power of the rotary kiln and the power consumption per unit of clinker.
[0134] The cement mill starting submodule is configured to, when the power regulation mode is starting the cement mill, calculate the continuous running time of the cement mill based on the running power of the cement mill, the power consumption per unit of cement, the running power of the rotary kiln and the power consumption per unit of clinker of the rotary kiln.
[0135] The simultaneous interruption submodule is configured to, when the power regulation mode is simultaneously interrupting the raw material mill and the cement mill, calculate the interruption duration of the raw material mill and the interruption duration of the cement mill based on the running power of the rotary kiln, the power consumption per unit of clinker and the raw material consumption per unit of clinker of the rotary kiln.
[0136] Preferably, the cost calculation module comprises a fixed cost submodule and a variable cost submodule.
[0137] The fixed cost submodule is configured to calculate the fixed cost of the cement enterprise in the regulation of load based on the pre-obtained automation degree of the cement enterprise under various power regulation modes.
[0138] The variable cost submodule is configured to calculate the variable cost of the cement enterprise based on the actual power at the interruption time of the equipment, the running power of the cement mill at the starting time of the cement mill and the duration under the different power regulation modes.
[0139] Preferably, the variable cost submodule comprises a downward adjustment unit and an upward adjustment unit.
[0140] The downward adjustment unit is configured to calculate the variable cost of the cement enterprise participating in the downward adjustment based on the actual power at the moment when the raw mill or the cement mill is interrupted and the interruption when the power adjustment mode is any one of interrupting the raw mill, interrupting the cement mill, and simultaneously interrupting the raw mill or the cement mill.
[0141] The upward adjustment unit is configured to calculate the variable cost of the cement enterprise participating in the upward adjustment based on the running power of the cement mill at the moment when the cement mill is started when the power adjustment mode is starting the cement mill.
[0142] Those skilled in the art will 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 an entirely hardware embodiment, an entirely 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-ROMs, optical storage, etc.) containing computer usable program code.
[0143] The present application is described with reference to flowcharts and / or block diagrams of methods, apparatus (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 combinations 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 a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions, which are executed via the processor of the computer or other programmable data processing apparatus, generate a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in a flow or multiple flows and / or blocks Figure 1 The functions specified in a flow or multiple flows and / or blocks
[0144] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including instruction means, which implement the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in a flow or multiple flows and / or blocks Figure 1 The functions specified in a flow or multiple flows and / or blocks
[0145] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus, so that a series of operation steps are performed on the computer or other programmable data processing apparatus to produce a computer-implemented process, so that the instructions executed on the computer or other programmable data processing apparatus provide a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in a flow or multiple flows and / or blocks Figure 1steps of the functions specified in the block or blocks.
[0146] The above merely provides an example of the present application, but is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims
1. A method of power regulation of a cement plant load, characterized by, The method comprises the following steps: The power regulation mode and the duration of each power regulation mode are obtained by bringing the power consumption data and production data of the cement enterprise into the pre-constructed adjustable load potential model; The running cost of the equipment under each power regulation mode is calculated based on the duration and power consumption cost under each power regulation mode; The power regulation of the cement enterprise load is performed in the power regulation mode with the minimum running cost; The adjustable load potential model is constructed by different load interruption durations obtained by the power regulation modes of starting the cement mill, interrupting the raw mill and / or interrupting the cement mill; The power regulation modes include interrupting the raw mill, interrupting the cement mill, starting the cement mill and simultaneously interrupting the raw mill and the cement mill; The construction of the adjustable load potential model comprises the following steps: When the power regulation mode is interrupting the raw mill, the raw mill is interrupted based on the raw material consumption and the storage amount of the raw material bin and the clinker bin, and the interruption duration of the raw mill is calculated based on the running power of the rotary kiln, the power consumption per unit of clinker and the raw material consumption per unit of clinker produced by the rotary kiln; When the power regulation mode is interrupting the cement mill, the interruption duration of the cement mill is calculated based on the running power of the rotary kiln and the power consumption per unit of clinker; When the power regulation mode is starting the cement mill, the continuous running time of the cement mill is calculated based on the running power of the cement mill, the power consumption per unit of cement, the running power of the rotary kiln and the power consumption per unit of clinker; When the power regulation mode is simultaneously interrupting the raw mill and the cement mill, the interruption duration of the raw mill and the interruption duration of the cement mill are calculated based on the running power of the rotary kiln, the power consumption per unit of clinker and the raw material consumption per unit of clinker produced by the rotary kiln; When the power regulation mode is interrupting the raw mill, the calculation formula of the interruption duration of the raw mill is as follows: wherein is the moment of interruption is the operating power of the rotary kiln for a period of time; is the power consumption for the production of a unit of clinker; is the quantity of raw meal consumed by the rotary kiln for the production of a unit of clinker; is the duration of interruption in the raw meal mill; is the quantity of raw meal consumed; is the quantity of raw meal stored in the raw meal silo at the moment of interruption; is the minimum quantity of raw meal stored in the raw meal silo; is the maximum quantity of raw meal stored in the raw meal silo; When the power regulation mode is interrupting the cement mill, the calculation formula of the interruption duration of the cement mill is as follows: wherein is the duration of the interruption in the cement mill; is the clinker production; is the clinker stock in the clinker silo at the moment of interruption; is the minimum stock of the clinker silo; is the maximum stock of the clinker silo; When the power regulation mode is starting the cement mill, the calculation formula of the continuous running time of the cement mill is as follows: wherein is the start time is the operating power of the cement mill; is the specific power consumption for the production of unit cement; is the duration of the cement mill operation; is the clinker inventory of the clinker silo at the start time is the clinker consumption; is the clinker consumption per unit of cement produced by the cement mill; When the power regulation mode is simultaneously interrupting the raw mill and the cement mill, the calculation formula of the interruption duration of the raw mill and the interruption duration of the cement mill is as follows: 。 2. The method of claim 1, wherein, The calculation of the running cost of the equipment under each power regulation mode based on the duration and power consumption cost under each power regulation mode comprises the following steps: The fixed cost of the cement enterprise for regulating the load is calculated based on the pre-obtained automation degree of the cement enterprise under each power regulation mode; The variable cost of the cement enterprise is calculated based on the actual power at the equipment interruption time, the running power of the cement mill at the cement mill starting time and the duration under different power regulation modes.
3. The method of claim 2, wherein, The calculation of the variable cost of the cement enterprise based on the actual power at the equipment interruption time, the running power of the cement mill at the cement mill starting time and the duration under different power regulation modes comprises the following steps: When the power regulation mode is any one of interrupting the raw mill, interrupting the cement mill and simultaneously interrupting the raw mill or the cement mill, the variable cost of the cement enterprise participating in the downward regulation is calculated based on the actual power at the interruption time of the raw mill or the cement mill and the interruption duration. When the power regulation mode is starting the cement mill, the variable cost of the cement enterprise participating in upward regulation is calculated based on the running power of the cement mill at the starting time of the cement mill.
4. The method of claim 3, wherein, The calculation of the variable cost of the cement enterprise participating in downward regulation is as follows: wherein, is the variable cost of the cement plant participating in the downward adjustment, is the load unit value loss, is the equipment raw mill or cement mill i is the actual power of the period, t is the actual power of the period, t is the raw mill or cement mill interruption duration.
5. The method of claim 3, wherein, The calculation of the variable cost of the cement enterprise participating in upward regulation is as follows: wherein, is the variable cost of the cement enterprise participating in the upward adjustment, is the new electricity cost of the cement enterprise, is the cement mill maintenance cost per unit power consumption of the enterprise power equipment, is the cost of the increased unit power consumption of the enterprise power equipment, is the continuous running time of the cement mill, is the is the running power of the cement mill at the starting moment of the period.
6. A power conditioning system for cement plant loads, characterized by, It comprises: a model solving module, a cost calculation module and a power regulation module; The model solving module is used to bring the power consumption data and production data of the cement enterprise into a pre-constructed adjustable load potential model to obtain multiple power regulation modes and the duration under each power regulation mode; The cost calculation module is used to calculate the running cost of the equipment under each power regulation mode based on the duration under each power regulation mode and the power consumption cost; The power regulation module is used to regulate the power of the load of the cement enterprise in the power regulation mode with the minimum running cost; The adjustable load potential model is constructed by different load interruption durations obtained by the power regulation modes of starting the cement mill, interrupting the raw material mill and / or interrupting the cement mill; The power regulation modes comprise interrupting the raw material mill, interrupting the cement mill, starting the cement mill and simultaneously interrupting the raw material mill and the cement mill; The model solving module comprises a raw material mill interruption submodule, a cement mill interruption submodule, a cement mill starting submodule and a simultaneous interruption submodule; The raw material mill interruption submodule is used to interrupt the raw material mill based on the raw material consumption and with the storage amount of the raw material bin and the storage amount of the clinker bin as constraints when the power regulation mode is interrupting the raw material mill, and to calculate the interruption duration of the raw material mill based on the running power of the rotary kiln, the power consumption per unit of clinker production and the raw material consumption per unit of clinker production of the rotary kiln; The cement mill interruption submodule is used to calculate the interruption duration of the cement mill based on the running power of the rotary kiln and the power consumption per unit of clinker production when the power regulation mode is interrupting the cement mill; The cement mill starting submodule is used to calculate the continuous running time of the cement mill based on the running power of the cement mill, the power consumption per unit of cement production, the running power of the rotary kiln and the power consumption per unit of clinker production when the power regulation mode is starting the cement mill; The simultaneous interruption submodule is used to calculate the interruption duration of the raw material mill and the interruption duration of the cement mill based on the running power of the rotary kiln, the power consumption per unit of clinker production and the raw material consumption per unit of clinker production of the rotary kiln when the power regulation mode is simultaneously interrupting the raw material mill and the cement mill; When the power regulation mode is interrupting the raw material mill, the calculation formula of the interruption duration of the raw material mill is as follows: wherein is the moment of interruption is the operating power of the rotary kiln for a period of time; is the power consumption for the production of a unit of clinker; is the quantity of raw meal consumed by the rotary kiln for the production of a unit of clinker; is the duration of interruption in the raw meal mill; is the quantity of raw meal consumed; is the quantity of raw meal stored in the raw meal silo at the moment of interruption; is the minimum quantity of raw meal stored in the raw meal silo; is the maximum quantity of raw meal stored in the raw meal silo; When the power regulation mode is interrupting the cement mill, the calculation formula of the interruption duration of the cement mill is as follows: wherein is the duration of the interruption in the cement mill; is the clinker production; is the clinker stock in the clinker silo at the moment of interruption; is the minimum stock in the clinker silo; is the maximum stock in the clinker silo; When the power regulation mode is starting the cement mill, the calculation formula of the continuous running time of the cement mill is as follows: wherein is the start time is the operating power of the cement mill; is the specific power consumption for the production of unit cement; is the duration of the cement mill operation; is the clinker inventory of the clinker silo at the start time is the clinker consumption; is the clinker consumption per unit of cement produced by the cement mill; When the power regulation mode is simultaneously interrupting the raw material mill and the cement mill, the calculation formula of the interruption duration of the raw material mill and the interruption duration of the cement mill is as follows: 。