CN106996623B - Central air conditioner room control method under energy consumption limit - Google Patents
Central air conditioner room control method under energy consumption limit Download PDFInfo
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- CN106996623B CN106996623B CN201710284519.0A CN201710284519A CN106996623B CN 106996623 B CN106996623 B CN 106996623B CN 201710284519 A CN201710284519 A CN 201710284519A CN 106996623 B CN106996623 B CN 106996623B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
Abstract
The invention discloses the central air conditioner room control methods under a kind of energy consumption limit, firstly, setting energy consumption limit information, after system receives energy consumption limit, is predicted, and export energy consumption limit response according to energy consumption limit operating status；To in time energy consumption limit time started since pretreatment time, building enters energy accumulating state or maintains state；Enter energy consumption limit state after reaching the energy consumption limit time started, calculate current assignable general power, the general power that will currently distribute, it is allocated between Central air-conditioning unit, chilled water pump, cooling water pump, cooling tower, after reaching the energy consumption limit time started, then cooling water pump, cooling tower, chilled water pump and unit are restored to non-energy consumption limit state operation.The present invention can make to build the control of central air conditioner system energy consumption in quota limit, and meet comfort level requirement as far as possible, on the one hand can mitigate power grid power supply pressure, on the one hand reduce the influence to constructing operation, guarantee the orderly progress of economic activity.
Description
Technical field
The present invention relates to the central air conditioner room control methods under a kind of energy consumption limit, belong to Air-condition system control technology neck
Domain.
Background technique
With the development of Chinese Urbanization and process of industrialization, the scale and quantity of public building and industrial building constantly increase
Add, building energy consumption constantly rises.And central air-conditioning is the energy consumption rich and influential family in building, generally occupies the 40%~60% of building
Energy consumption.When power supply capacity is unable to satisfy power demand, if building central air conditioner system can control energy consumption in limit model
In enclosing, and meet comfort level requirement as far as possible, then on the one hand can mitigate power grid power supply pressure, on the one hand reduce and building is transported
Capable influence guarantees the orderly progress of economic activity.
The method for solving energy consumption limit at present is that implementation plan has a power failure, and in specific time period, closes building central air conditioner system,
To complete energy consumption limit plan.But scheduled outage generally require in advance a couple of days according to power grid power supply capacity and power demand into
A possibility that rigidity power failure plan is formulated in row prediction, and there are excessive power failures；Secondly, building central air-conditioning system during scheduled outage
System completely closes, and building function is a greater impact.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the deficiencies of existing technologies, the center under a kind of energy consumption limit is provided
Air Conditioning Facilities control method, building central air conditioner system dynamically adjust operating status according to the power supply capacity of power grid, meet electricity
While net demand, the influence to building function is reduced most possibly.
In order to solve the above technical problems, the present invention provides the central air conditioner room control method under a kind of energy consumption limit, packet
Include following steps:
1) the energy consumption limit of special time period, energy consumption limit letter are set by data communication interface or personnel's input mode
Breath includes energy consumption limit time started Tst, energy consumption limit dwell time Tend, maximal input Nlmt, maximum electricity consumption Plmt；
2) it is pre- to being carried out in energy consumption clipping time section according to energy consumption limit operating status first after system receives energy consumption limit
It surveys, and exports energy consumption limit response；
3) enter energy consumption limit state, from pretreatment time TpreStart to energy consumption limit time started TstIn time, building
Into cold-storage state or maintain state；The pretreatment time TpreAccording to the water outlet of the load side of central air conditioner system according to being
The minimum flow rate of system operation is recycled to the time of farthest end to determine；
4) by the energy consumption limit time started T of settingstCompared with the real time, enter after reaching the energy consumption limit time started
Energy consumption limit state, not up to energy consumption limit time started then repeat step 3), continue cold-storage；
5) it is brought into operation by the energy consumption limit time started, can currently be distributed according to the prediction data calculating in the step 2)
General power；
6) power level is calculated according to the actual parameter of equipment and load rate of plant, power level is divided into three-level, power stage
Other 1 is Nset1, power level 2 is Nset2, power level 3 is Nset3；
7) the current distribute general power N obtained by step 4)all(t0) the value N of power level 1 that obtains with step 6)set1
It makes comparisons, if Nall(t0) it is greater than Nset1, then cooling water pump, cooling tower are run according to non-energy consumption limit state, dump power point
Dispensing chilled water pump and unit, chilled water pump and unit are according to rate of load condensate η1Operation；Then it is transferred to step 10)；Otherwise it is transferred to step
It is rapid 8)；
8) the current distribute general power N obtained by step 4)all(t0) the value N of power level 2 that obtains with step 6)set2
It makes comparisons, if Nall(t0) it is less than Nset1And it is greater than Nset2, then cooling water pump, chilled water pump, cooling tower and unit are according to load
Rate η2Operation；Then it is transferred to step 10)；Otherwise it is transferred to step 9)；
9) the current distribute general power N obtained by step 4)all(t0) the value N of power level 3 that obtains with step 6)set3
It makes comparisons, if Nall(t0) it is less than Nset2And it is greater than Nset3, then stop cooling water pump, cooling tower and unit operation, chilled water pump
It is run according to minimum load rate；If Nall(t0) it is less than Nset3, then stop cooling water pump, cooling tower, chilled water pump and unit fortune
Row；Then it is transferred to step 10)；
10) by the energy consumption limit dwell time T of settingendCompared with the real time, it is laggard to reach energy consumption limit dwell time
Enter non-energy consumption limit normal operating condition, not up to energy consumption limit dwell time then return step 5), until reaching energy consumption limit
Dwell time restores normal operating condition.
In aforementioned step 2), using prediction algorithm neural network based, according to historical data and current data, prediction
Electricity consumption P of the central air conditioner system in energy consumption clipping time section normal operation outf, system real-time load Qf(t) and system
In the general refrigeration ability C of energy consumption clipping time section normal needf, compare PfAnd Ps, work as PfGreater than PsWhen, then energy consumption limit response is exported,
It enters step 3)；Work as PfLess than PsWhen, then energy consumption limit response is not exported, and system is operated normally according to non-power consumption state, PsFor reality
Border residue available power.
Energy consumption limit response above-mentioned is real surplus available power PsWith central air conditioner system in energy consumption clipping time section
The electricity consumption P of normal operationf。
In aforementioned step 3), cold-storage state is entered according to chilled water temperature and the judgement of indoor temperature and humidity data and is either tieed up
State is held, system makes to export cooling capacity slightly larger than system loading by controlling central air-conditioning leaving water temperature, and building enters cold-storage state；
When central air conditioning water temperature reaches system design lower bound, and indoor temperature and humidity reaches comfort level tolerance lower bound, system is logical
Crossing control central air-conditioning leaving water temperature makes to export cooling capacity and system loading balance, and building enters maintenance state.
In aforementioned step 5), current assignable general power Nall(t0) are as follows:
Nall(t0)=KQf(t0)
Wherein, t0For current time, Qf(t0) it is current system real-time load,
In aforementioned step 6), the calculation method of power level are as follows:
If η is load rate of plant, range is 0~1, wherein η=0 indicates equipment work in minimum load, and the expression of η=1 is set
It is standby to work in non-energy consumption limit state,
The relationship of load rate of plant and equipment operation power can be obtained according to facility information: unit load rate and unit are run
Power relation is Nch(η), chilled water pump rate of load condensate and chilled water pump operation power relation are Nchwp(η), cooling water pump rate of load condensate
It is N with cooling water pump operation power relationcwp(η), cooling tower load rate and cooling tower operation power relation are Nct(η)；
Power level calculating formula are as follows:
Power level 1:Nset1=Ncwp(1)+Nct(1)+Nchwp(0)+Nch(0)；
Power level 2:Nset2=Ncwp(0)+Nct(0)+Nchwp(0)+Nch(0)；
Power level 3:Nset3=Nchwp(0)。
In aforementioned step 7), η1Meet: Nch(η1)+Nchwp(η1)=Nall(t0)-Ncwp(1)-Nct(1)。
In aforementioned step 8), η2Meet: Nch(η2)+Nchwp(η2)+Ncwp(η2)+Nct(η2)=Nall(t0)。
Advantageous effects of the invention:
The present invention can make to build the control of central air conditioner system energy consumption in quota limit, dynamically adjust operating status,
And meet comfort level requirement as far as possible, it on the one hand can mitigate power grid power supply pressure, on the one hand reduce the influence to constructing operation,
Guarantee the orderly progress of economic activity.
Detailed description of the invention
Fig. 1 is the flow chart of the method for the present invention.
Specific embodiment
The invention will be further described below.Following embodiment is only used for clearly illustrating technical side of the invention
Case, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, the central air conditioner room control method under energy consumption limit of the invention, comprising the following steps:
1) the energy consumption limit of special time period, energy consumption limit letter are set by data communication interface or personnel's input mode
Breath includes energy consumption limit time started Tst, energy consumption limit dwell time Tend, maximal input Nlmt, maximum electricity consumption Plmt。
2) after system receives energy consumption limit, first to section (the energy consumption limit time started to energy consumption limit energy consumption clipping time
Dwell time) in predicted according to energy consumption limit operating status, and export energy consumption limit response.
Prediction algorithm neural network based is utilized in prediction algorithm, according to historical data and current data, predicts
Entreat air-conditioning system in the electricity consumption P of energy consumption clipping time section normal operationf, system real-time load Qf(t) and system is in energy
Consume the general refrigeration ability C of clipping time section normal needf, compare PfAnd Ps, work as PfGreater than PsWhen, then energy consumption limit response is exported, is entered
Step 3)；Work as PfLess than PsWhen, then energy consumption limit response is not exported, and system is operated normally according to non-power consumption state, PsIt is practical surplus
Remaining available power.
Energy consumption limit response is real surplus available power PsWith the electricity consumption P of forecasting system normal operationf。
3) enter energy consumption limit state, from pretreatment time TpreStart to energy consumption limit time started TstIn time, building
Into cold-storage state or maintain state；Pretreatment time TpreIt is discharged according to the load side of central air conditioner system and is transported according to system
Capable minimum flow rate is recycled to the time of farthest end to determine, is entered according to chilled water temperature and the judgement of indoor temperature and humidity data
Cold-storage state either maintains state, and system makes output cooling capacity be slightly larger than system loading by controlling central air-conditioning leaving water temperature,
Building enters cold-storage state；Lower bound is designed when central air conditioning water temperature reaches system, and indoor temperature and humidity reaches comfort level
When tolerating lower bound, system makes to export cooling capacity and system loading balance by controlling central air-conditioning leaving water temperature, and building, which enters, to be maintained
State.
4) by the energy consumption limit time started T of settingstCompared with the real time, enter after reaching the energy consumption limit time started
Energy consumption limit state, not up to energy consumption limit time started then repeat step 3), continue cold-storage.
5) it is brought into operation, is calculated according to the prediction data in step 2) current assignable total by the energy consumption limit time started
Power Nall, based on assuming that load curve and computational constant K, load curve and energy consumption curve under energy consumption curve unanimous circumstances
Under unanimous circumstances, constant K is fixed value, realtime power Nf(t), pass through the system real-time load Q of constant K and predictionf(t)
Calculate current assignable total power input Nall, calculation are as follows:
Assuming that load curve is consistent with energy consumption curve, then exist:
Nf(t)=KQf(t)
K is constant, according to this formula to calculating,
∫Nf(t) dt=∫ KQf(t)dt
Cause are as follows:
Pf=∫ Nf(t)dt
Cf=∫ Qf(t)dt
So:
Pf=KCf
It obtains:
According to the system real-time load Q of predictionf(t) current time t is calculated0Assignable total power input Nall(t0):
Nall(t0)=KQf(t0)。
6) power level is calculated according to the actual parameter of equipment and load rate of plant,
If η is load rate of plant, range is 0~1, wherein η=0 indicates equipment work in minimum load, and the expression of η=1 is set
Standby work is in non-energy consumption limit state.
The relationship of load rate of plant and equipment operation power can be obtained according to facility information: unit load rate and unit are run
Power relation is Nch(η), chilled water pump rate of load condensate and chilled water pump operation power relation are Nchwp(η), cooling water pump rate of load condensate
It is N with cooling water pump operation power relationcwp(η), cooling tower load rate and cooling tower operation power relation are Nct(η)；
Power level calculates, and according to the actual parameter calculated load rate of equipment, meets the normal operation of system, power level
Calculation are as follows:
Power level 1:Nset1=Ncwp(1)+Nct(1)+Nchwp(0)+Nch(0)；
Power level 2:Nset2=Ncwp(0)+Nct(0)+Nchwp(0)+Nch(0)；
Power level 3:Nset3=Nchwp(0)。
7) the current distribute general power N obtained by step 4)all(t0) the value N of power level 1 that obtains with step 6)set1
It makes comparisons, if Nall(t0) it is greater than Nset1, then cooling water pump, cooling tower are run according to non-energy consumption limit state, dump power point
Dispensing chilled water pump and unit, chilled water pump and unit are according to rate of load condensate η1Operation；η1Meet: Nch(η1)+Nchwp(η1)=Nall
(t0)-Ncwp(1)-Nct(1), dump power, that is, Nall(t0)-Ncwp(1)-Nct(1)。
8) the current distribute general power N obtained by step 4)all(t0) the value N of power level 2 that obtains with step 6)set2
It makes comparisons, if Nall(t0) it is less than Nset1And it is greater than Nset2, then cooling water pump, chilled water pump, cooling tower and unit are according to load
Rate η2Operation；η2Meet: Nch(η2)+Nchwp(η2)+Ncwp(η2)+Nct(η2)=Nall(t0)。
9) the current distribute general power N obtained by step 4)all(t0) the value N of power level 3 that obtains with step 6)set3
It makes comparisons, if Nall(t0) it is less than Nset2And it is greater than Nset3, then stop cooling water pump, cooling tower and unit operation, chilled water pump
It is run according to minimum load rate；If Nall(t0) it is less than Nset3, then stop cooling water pump, cooling tower, chilled water pump and unit fortune
Row.Chilled water pump minimum load is Nchwp(0)。
10) by the energy consumption limit dwell time T of settingendCompared with the real time, it is laggard to reach energy consumption limit dwell time
Enter non-energy consumption limit normal operating condition, not up to energy consumption limit dwell time then return step 5), until reaching energy consumption limit
Dwell time restores normal operating condition.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (8)
1. the central air conditioner room control method under energy consumption limit, which comprises the following steps:
1) the energy consumption limit of special time period, energy consumption limit packet are set by data communication interface or personnel's input mode
Include energy consumption limit time started Tst, energy consumption limit dwell time Tend, maximal input Nlmt, maximum electricity consumption Plmt；
2) it after system receives energy consumption limit, is predicted according to energy consumption limit operating status in energy consumption clipping time section first,
And export energy consumption limit response；
3) enter energy consumption limit state, from pretreatment time TpreStart to energy consumption limit time started TstIn time, building enters
Cold-storage state maintains state；The pretreatment time TpreIt is discharged according to the load side of central air conditioner system and is transported according to system
Capable minimum flow rate is recycled to the time of farthest end to determine；
4) by the energy consumption limit time started T of settingstCompared with the real time, enter energy consumption after reaching the energy consumption limit time started
Limit state, not up to energy consumption limit time started then repeat step 3), continue cold-storage；
5) it is brought into operation, is calculated according to the prediction data in the step 2) current assignable total by the energy consumption limit time started
Power；
6) power level is calculated according to the actual parameter of equipment and load rate of plant, power level is divided into three-level, and power level 1 is
Nset1, power level 2 is Nset2, power level 3 is Nset3；
7) the current distribute general power N obtained by step 4)all(t0) the value N of power level 1 that obtains with step 6)set1Make ratio
Compared with if Nall(t0) it is greater than Nset1, then cooling water pump, cooling tower are run according to non-energy consumption limit state, and dump power is distributed to
Chilled water pump and unit, chilled water pump and unit are according to rate of load condensate η1Operation；Then it is transferred to step 10)；Otherwise it is transferred to step 8)；
8) the current distribute general power N obtained by step 4)all(t0) the value N of power level 2 that obtains with step 6)set2Make ratio
Compared with if Nall(t0) it is less than Nset1And it is greater than Nset2, then cooling water pump, chilled water pump, cooling tower and unit are according to rate of load condensate η2
Operation；Then it is transferred to step 10)；Otherwise it is transferred to step 9)；
9) the current distribute general power N obtained by step 4)all(t0) the value N of power level 3 that obtains with step 6)set3Make ratio
Compared with if Nall(t0) it is less than Nset2And it is greater than Nset3, then stop cooling water pump, cooling tower and unit operation, chilled water pump according to
The operation of minimum load rate；If Nall(t0) it is less than Nset3, then stop cooling water pump, cooling tower, chilled water pump and unit operation；So
After be transferred to step 10)；
10) by the energy consumption limit dwell time T of settingendCompared with the real time, reach enter after energy consumption limit dwell time it is non-
Energy consumption limit normal operating condition, not up to energy consumption limit dwell time then return step 5), stop until reaching energy consumption limit
Time restores normal operating condition.
2. the central air conditioner room control method under energy consumption limit according to claim 1, which is characterized in that the step
2) in, central air conditioner system is predicted in energy according to historical data and current data using prediction algorithm neural network based
Consume the electricity consumption P of clipping time section normal operationf, system real-time load Qf(t) and system energy consumption clipping time section just
The general refrigeration ability C often neededf, compare PfAnd Ps, work as PfGreater than PsWhen, then energy consumption limit response is exported, is entered step 3)；Work as PfIt is less than
PsWhen, then energy consumption limit response is not exported, and system is operated normally according to non-power consumption state, PsFor real surplus available power.
3. the central air conditioner room control method under energy consumption limit according to claim 2, which is characterized in that the energy consumption
Limit response is real surplus available power PsWith central air conditioner system energy consumption clipping time section normal operation electricity consumption
Measure Pf。
4. the central air conditioner room control method under energy consumption limit according to claim 1, which is characterized in that the step
3) in, cold-storage state is entered according to chilled water temperature and the judgement of indoor temperature and humidity data and either maintains state, system passes through control
Central air-conditioning leaving water temperature processed makes to export cooling capacity slightly larger than system loading, and building enters cold-storage state；When central air conditioning water
Temperature reach system design lower bound, and indoor temperature and humidity reach comfort level tolerance lower bound when, system by control central hollow recall
Coolant-temperature gage makes to export cooling capacity and system loading balances, and building enters maintenance state.
5. the central air conditioner room control method under energy consumption limit according to claim 2, which is characterized in that the step
5) in, current assignable general power Nall(t0) are as follows:
Nall(t0)=KQf(t0)
Wherein, t0For current time, Qf(t0) it is current system real-time load,
6. the central air conditioner room control method under energy consumption limit according to claim 1, which is characterized in that the step
6) in, the calculation method of power level are as follows:
If η is load rate of plant, range is 0~1, wherein η=0 indicates equipment work in minimum load, and η=1 indicates equipment work
Make in non-energy consumption limit state,
The relationship of load rate of plant and equipment operation power can be obtained according to facility information: unit load rate and unit run power
Relationship is Nch(η), chilled water pump rate of load condensate and chilled water pump operation power relation are Nchwp(η), cooling water pump rate of load condensate with it is cold
But water pump operation power relation is Ncwp(η), cooling tower load rate and cooling tower operation power relation are Nct(η)；
Power level calculating formula are as follows:
Power level 1:Nset1=Ncwp(1)+Nct(1)+Nchwp(0)+Nch(0)；
Power level 2:Nset2=Ncwp(0)+Nct(0)+Nchwp(0)+Nch(0)；
Power level 3:Nset3=Nchwp(0)。
7. the central air conditioner room control method under energy consumption limit according to claim 6, which is characterized in that the step
7) in, η1Meet: Nch(η1)+Nchwp(η1)=Nall(t0)-Ncwp(1)-Nct(1)。
8. the central air conditioner room control method under energy consumption limit according to claim 6, which is characterized in that the step
8) in, η2Meet: Nch(η2)+Nchwp(η2)+Ncwp(η2)+Nct(η2)=Nall(t0)。
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| US20210224645A1 (en) * | 2018-05-28 | 2021-07-22 | Alibaba Group Holding Limited | Hierarchical concept based neural network model for data center power usage effectiveness prediction |
| CN109028472B (en) * | 2018-07-19 | 2021-02-23 | 青岛海信日立空调***有限公司 | Energy-saving control method of air conditioner |
| CN109631238A (en) * | 2019-01-28 | 2019-04-16 | 宁波溪棠信息科技有限公司 | A kind of control system and control method improving air-conditioning system operational energy efficiency |
| WO2020198971A1 (en) * | 2019-03-29 | 2020-10-08 | 亿可能源科技（上海）有限公司 | Management method and system, and control method and system for air conditioning system, and storage medium |
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