CN104113140B - A kind of industrial enterprise's level of factory power demand control system and device - Google Patents
A kind of industrial enterprise's level of factory power demand control system and device Download PDFInfo
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- CN104113140B CN104113140B CN201410354083.4A CN201410354083A CN104113140B CN 104113140 B CN104113140 B CN 104113140B CN 201410354083 A CN201410354083 A CN 201410354083A CN 104113140 B CN104113140 B CN 104113140B
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Abstract
The present invention discloses a kind of industrial enterprise level of factory power demand control system and device, comprise following content: this system is by the power demand Optimization analyses module of Optimized Operation layer, the power demand control device of supervisory layers and the power demand final controlling element of conventional control layer are formed, wherein, Optimized Operation layer and supervisory layers adopt MODBUS-TCP mode to carry out communication, GOOSE mode is adopted to carry out communication between device, this system by power demand Optimization analyses module according to prediction and trend analysis result, in conjunction with the real time information of power demand flow network, calculate demand control desired value, then the power demand control device of supervisory layers is handed down to, this device is according to the actual motion state of region within the jurisdiction control object, calculating is optimized to load adjustment amount, and control command is handed down to the power demand final controlling element of conventional control layer, realize the closed-loop control to control object.
Description
Technical field
The invention belongs to the control field of industrial processes, particularly a kind of level of factory power demand control system and device.
Background technology
In every cost of industrial enterprise, the electricity charge have become the after following Material Cost, cost of labor closely the 3rd or the maximum greatly cost of Section 4, particularly in some high energy-consuming enterprises, the electricity charge become topmost cost but, many enterprises are due to each side reasons such as management, technique, technology, electricity consumption utilization ratio is on the low side, there is higher energy-saving potential, therefore by the employing of electric power energy-saving technology, reduce electric cost expenditure cost, improve concern and attention that profit margin has caused more and more industrial enterprise.
Current China for transformer capacity powered in large size industrial enterprise user 315kVA or the power consumption equipment installed capacity user at more than 315kVA, carry out two-part rate system price, i.e. electric degree electricity price and basic electricity price, basic electricity price is according to the transformer capacity of industrial enterprise or maximum demand (i.e. the maximum of every 15 minutes per month or the 30 minutes average loads) foundation as calculating electricity price, power supply department and electricity consumption department is had to sign a contract, determine limit, monthly fixedly collect, not with actual power consumption quantity for transfer; Electric degree electricity price is the electricity price calculated by the electricity consumption department actual power consumption number of degrees.Maximum demand refers to the average power of measuring (15 minutes or 30 minutes) the client's electricity consumption that (is generally month) certain a period of time within certain accounting period, retains the maximum demand of its maximum indicated value as this accounting period.The industrial enterprise adopting " maximum demand " as basic electricity price charging is answered to the operational mode of each operation of reasonable arrangement, avoid powerful device start simultaneously or run as far as possible, the operation with impact load characteristic effectively to be controlled especially, reduce the peak load of enterprise, and above-mentioned target will be realized, to operate artificially and be difficult to accomplish, need to rely on power demand control system to control enterprise's requirement, changed by power, power time delay, the means such as power excision realize the rational allocation to business electrical, reduce impulse current to the impact of power equipment, improve business electrical quality, reduce business electrical cost.
Existing maximum demand control device generally all adopts the mode of single device to carry out monitoring and controlling to requirement examination point device, cannot setting up enterprise's level of factory power demand Controlling model, can not take into account the power load situation of other operation when controlling; Do not configure power demand final controlling element, there is no the collecting unit of self, electric degree information can only be gathered by kilowatt-hour meter, the process data of more difficult collection control appliance.
Summary of the invention
Object of the present invention, be to provide a kind of industrial enterprise level of factory power demand control system, it is by setting up industrial enterprise's three layers of power demand optimized Control Mode, the operational mode of each electricity consumption operation of reasonable arrangement enterprise, avoid powerful device start simultaneously or run as far as possible, the operation with impact load characteristic effectively to be controlled especially, the rational allocation to business electrical is realized by means such as power change, power time delay, power excisions, reduce impulse current to the impact of power equipment, improve business electrical quality, reduce business electrical cost.
Technical scheme of the present invention is:
A kind of industrial enterprise level of factory power demand control system, this system is by the power demand Optimization analyses module of Optimized Operation layer, the power demand control device of supervisory layers and the power demand final controlling element of conventional control layer are formed, wherein, Optimized Operation layer and supervisory layers adopt MODBUS-TCP mode to carry out communication, GOOSE mode is adopted between device, this system by power demand Optimization analyses module according to prediction and trend analysis result, in conjunction with the real time information of power demand flow network, calculate demand control desired value, then the power demand control device of described supervisory layers is handed down to, the power demand control device of described supervisory layers is according to the actual motion state of region within the jurisdiction control object, calculating is optimized to load adjustment amount, and control command is handed down to the power demand final controlling element of conventional control layer, realize the closed-loop control to control object.
In such scheme: the power demand Optimization analyses module of Optimized Operation layer is served five parts by the modeling of power demand flow network, load prediction, trend analysis, Optimal Decision-making and control and formed:
A) modeling of power demand flow network is according to the electric network composition of industrial enterprise and power consumption characteristics, by power supply point, transmission facility, end loads, adopts artwork storehouse method of integrated modeling to carry out modeling, forms level of factory power demand flow network model;
B) load prediction is for the part throttle characteristics of the power load of industrial enterprise, three types is divided into predict: power supply critical point load prediction, equivalent electro-load forecast, special procedure load prediction, wherein, power supply critical point load prediction is applied in requirement examination point, it is large that equivalent electro-load forecast is applicable to power load, the stable process load of load variations, special procedure load prediction is used for the larger impact load of load variations;
C) trend analysis is with the maximum demand of enterprise's contract engagement for benchmark, judges current power consumption situation in conjunction with load prediction results analysis, judges the preferably opportunity increasing or reduce load exactly
D) Optimal Decision-making is according to the result of trend analysis, calculates the power demand total amount needing to regulate, in conjunction with the running status of controllable device, and adopts the method for similar nargin to calculate the demand control desired value of each supervisory layers power demand control device;
E) control the demand control desired value that Optimal Decision-making produces by service, after validity check, be handed down to the device of supervisory layers by the communication modes of MODBUS-TCP, and receive its field data uploaded and control value of feedback.
The present invention also provides a kind of industrial enterprise level of factory power demand control device, is positioned at supervisory layers, and described power demand control device is made up of Data Analysis Services, power demand optimization distribution, control command process three basic modules; Described power demand control device accepts the control objectives value of higher level, and the running status in conjunction with the control appliance of administrative controlled area is optimized distribution, and control information is handed down to control power demand final controlling element, realizes the closed-loop control to field control equipment.
In such scheme: the data analysis module process of described control device on accept control objectives value and the system block signal of Optimized Operation layer, and the power of each power consumption equipment, power demand and control limit are uploaded to Optimized Operation layer; To analog signals, the on-off model of the controlled power consumption equipment in scene that lower Real-time Collection power demand final controlling element gathers.
In such scheme: described optimization distributes and specifically refers to: the control objectives value that power demand control device issues according to Optimized Operation layer, coupling apparatus real-time data collection, according to the production cost curve of each controlled power consumption equipment, adopt the method for Dynamic Programming to be optimized distribution, generate rational control command.
In such scheme: analog signals and the on-the-spot on-off model such as voltage, electric current, power, electric degree of the controlled power consumption equipment of described power demand final controlling element collection site, above give the power demand control device on upper strata; And accepting the control command that upper strata issues, the power realizing on-the-spot controlled power consumption equipment changes, power time delay and power excision.
After adopting such scheme, the present invention has the following advantages:
(1) adopt the power demand control model of three layers (Optimized Operation layer, supervisory layers, conventional control layers) from top to bottom, specify that control task at different levels, improve the fail safe of control;
(2) employing sets up industrial enterprise's level of factory power demand flow network model based on the artwork storehouse integrated technique of flow network, achieves the dynamic topology of power demand;
(3) by part throttle characteristics, classification process is carried out to power load, industrial enterprise's load forecast mechanism of the critical point load prediction that formed to power, equivalent electro-load forecast, special power consumption equipment load prediction;
(4) by power demand final controlling element, realize the controlled power consumption equipment voltage in scene, electric current, electric degree, the collection of process data and the closed-loop control to equipment;
(5) the present invention is utilized to the rational allocation of business electrical, impulse current can be reduced on the impact of power equipment, improve business electrical quality, reduce business electrical cost.
Accompanying drawing explanation
Fig. 1 is three layers of control structure of level of factory power demand control system;
Fig. 2 is the function diagram of power demand control device.
Embodiment
Below with reference to accompanying drawing, technical scheme of the present invention is described in detail.
Fig. 1 gives three layers of control structure of level of factory power demand control system, is respectively Optimized Operation layer main website power demand Optimization analyses module, the power demand control device of supervisory layers and the power demand final controlling element of conventional control layer.
1) power demand Optimization analyses module comprises flow network model, load prediction, trend analysis and Optimal Decision-making four major functions.Due to operation not all in industrial enterprise or power equipment all relevant to demand control, therefore need according to the production of enterprise actual, adopt the artwork storehouse integrationization technology based on flow network, set up the flow network model of reflection industrial enterprise power demand; And set up the relation of node model and device model by simulator index, and pass through the data acquisition of automatic mapping technology realization flow network;
According to the difference of passing node equipments part throttle characteristics in power demand flow network model, the different forecast model of employing and algorithm are predicted, specifically comprise power supply critical point load prediction, equivalent electro-load forecast, special procedure load prediction.Power supply critical point refers to the monitoring point of the maximum demand that enterprise and power supply department are arranged; Equivalent power load refers to and the power load of enterprise's same kind is superposed, to reduce prediction measuring point quantity; Special procedure load refers to enterprise's internal loading fluctuation comparatively large, enterprise's critical point requirement is had to the electricity consumption operation of considerable influence;
Trend analysis for standard, judges current power consumption situation in conjunction with load prediction results analysis with enterprise's maximum demand contract definite value, accurately and intelligently judges the preferably opportunity increasing or reduce load;
Optimal Decision-making, according to the result of trend analysis, in conjunction with the setting situation of controling parameters, adopts the method for similar nargin to calculate the demand control desired value of each control area, and is handed down to power demand control device.
2) the region difference controlled according to enterprise's power demand can configure several power demand control device, and each device and main website set up communication and be connected, and accept control objectives value and the system block signal of higher level; Analog signals, the on-off model of the controlled power consumption equipment in scene of Real-time Collection power demand final controlling element collection in worksite, and be handed down to power demand final controlling element by optimizing the control command after distributing.
3) analog signals and the on-the-spot on-off model such as voltage, electric current, power, electric degree of the controlled power consumption equipment of power demand final controlling element collection site, above give the power demand control device on upper strata; And accepting the control command that upper strata issues, the power realizing on-the-spot controlled power consumption equipment changes, power time delay and power excision; Control command directly can be handed down to on-the-spot controlled power consumption equipment, also by order is handed down to PLC control system, can complete the closed-loop control to field apparatus by PLC.
Fig. 2 is the function diagram of power demand control device: power demand control device is primarily of Data Analysis Services, power demand optimization distribution, control command process three functional module compositions.
Data Analysis Services is the basis that power demand controls, on accept the control objectives value of higher level and judge whether available; To under gather the status signal of each controlled power consumption equipment from power demand final controlling element, provide data message accurately for power demand optimization distributes;
The realization that power demand optimization distribution comprises Feedback of Power and partially calculates, requirement optimizes allocation strategy.Accept the control objectives value that Optimized Operation layer issues, in conjunction with the real-time power load of one's respective area, by calculating control deviation amount, and being optimized distribution between administrative controlled power consumption equipment, control command being handed down to power demand final controlling element.
The present invention can be used for the control of large size industrial enterprise power demand, medium-sized and small enterprises region spatial load forecasting, enterprise's analysis of Power Load Characteristic and statistics and employing " maximum demand " the commerce and trade enterprise as basic electricity price charging.
To sum up, a kind of industrial enterprise of the present invention level of factory power demand control system, adopt and set up power demand control flow networking model based on the artwork storehouse integrated technique of flow network, the future trends that power demand controls concerned process steps and equipment is obtained by load prediction and trend analysis, formulate effective demand control strategy, and demand control value is handed down to demand control device, after optimizing and distributing, the closed-loop control to demand control conditioning equipment is realized by final controlling element, final realization reduces peak demand, disappear peak load, reduce enterprise power supply expense, the object saved production cost.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, and every technological thought proposed according to the present invention, any change that technical scheme basis is done, all falls within scope.
Claims (2)
1. industrial enterprise's level of factory power demand control system, it is characterized in that: this system is by the power demand Optimization analyses module of Optimized Operation layer, the power demand control device of supervisory layers and the power demand final controlling element of conventional control layer are formed, wherein, Optimized Operation layer and supervisory layers adopt MODBUS-TCP mode to carry out communication, GOOSE mode is adopted between device, this system by power demand Optimization analyses module according to prediction and trend analysis result, in conjunction with the real time information of power demand flow network, calculate demand control desired value, then the power demand control device of described supervisory layers is handed down to, the power demand control device of described supervisory layers is according to the actual motion state of the control object of administrative controlled area, calculating is optimized to load adjustment amount, and control command is handed down to the power demand final controlling element of conventional control layer, realize the closed-loop control to control object,
The power demand Optimization analyses module of Optimized Operation layer is served five parts by the modeling of power demand flow network, load prediction, trend analysis, Optimal Decision-making and control and is formed:
A) modeling of power demand flow network is according to the electric network composition of industrial enterprise and power consumption characteristics, by power supply point, transmission facility, end loads, adopts artwork storehouse method of integrated modeling to carry out modeling, forms level of factory power demand flow network model;
B) load prediction is for the part throttle characteristics of the power load of industrial enterprise, three types is divided into predict: power supply critical point load prediction, equivalent electro-load forecast, special procedure load prediction, wherein, power supply critical point load prediction is applied in requirement examination point, it is large that equivalent electro-load forecast is applicable to power load, the stable process load of load variations, special procedure load prediction is used for the larger impact load of load variations;
C) trend analysis is with the maximum demand of enterprise's contract engagement for benchmark, judges current power consumption situation in conjunction with load prediction results analysis, judges the preferably opportunity increasing or reduce load exactly
D) Optimal Decision-making is according to the result of trend analysis, calculates the power demand total amount needing to regulate, in conjunction with the running status of controlled object, and adopts the method for similar nargin to calculate the demand control desired value of each supervisory layers power demand control device;
E) control the demand control desired value that Optimal Decision-making produces by service, after validity check, be handed down to the device of supervisory layers by the communication modes of MODBUS-TCP, and receive its field data uploaded and control value of feedback.
2. the power demand control device in a kind of industrial enterprise as claimed in claim 1 level of factory power demand control system, is characterized in that, be positioned at supervisory layers, be made up of Data Analysis Services, power demand optimization distribution, control command process three basic modules; Described power demand control device accepts the control objectives value that Optimized Operation layer issues, running status in conjunction with the control object of administrative controlled area is optimized distribution, and control command is handed down to power demand final controlling element, realize the closed-loop control to field control object;
Described optimization distributes and specifically refers to: the control objectives value that power demand control device issues according to Optimized Operation layer, coupling apparatus real-time data collection, according to the production cost curve of each control object, adopt the method for Dynamic Programming to be optimized distribution, generate rational control command.
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| CN110829426B (en) * | 2019-11-26 | 2021-12-31 | 国网电子商务有限公司 | Method and device for adjusting maximum demand of enterprise |
| CN111342459B (en) * | 2020-03-26 | 2022-07-22 | 南京南瑞继保电气有限公司 | Power demand decision analysis system and method |
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