CN109059195A - For cutting down the control method and control system of the central air-conditioning of network load peak value - Google Patents
For cutting down the control method and control system of the central air-conditioning of network load peak value Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 254
- 238000005520 cutting process Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005057 refrigeration Methods 0.000 claims abstract description 108
- 238000013486 operation strategy Methods 0.000 claims abstract description 56
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- 238000005457 optimization Methods 0.000 claims description 14
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 46
- 238000001816 cooling Methods 0.000 description 17
- 238000004891 communication Methods 0.000 description 13
- 230000005611 electricity Effects 0.000 description 10
- 238000003860 storage Methods 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
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Classifications
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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
- F24F11/46—Improving electric energy efficiency or saving
- F24F11/47—Responding to energy costs
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
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- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of for cutting down the control method of the central air-conditioning of network load peak value, comprising: the peak value of electric load is predicted in power-management centre, establishes peak period；Before peak period arrival, power-management centre issues air-conditioning centralized control center and instructs, and is collected to current total power load value of central air-conditioning；Air-conditioning centralized control center obtains giving power-management centre in the total power load value that can be cut down；When the power load charge values that total power load value that judgement can be cut down when power-management centre needs to cut down when being greater than peak value, Optimal Operation Strategies are issued to regulator control system by air-conditioning centralized control center；Chilled water water outlet temperature setting of the regulator control system in the refrigeration machine for reducing central air-conditioning before peak period reaches.The invention also discloses a kind of control systems, comprising: power-management centre, air-conditioning centralized control center, regulator control system.Compared with prior art, the power load for reducing peak period ensures the safe operation of power grid.
Description
Technical field
The present invention relates to field of energy-saving technology, in particular to one kind is by central air-conditioning (especially large and medium-sized central hollow
Adjust) optimize operation to cut down the method and system of network load peak value.
Background technique
In recent years, with the fast development of national economy and the raising of living standards of the people, the sharp increase of air conditioner load
Summer network load is had become to be difficult to balance the major reason with power supply shortage.Statistics indicate that, China's electric power is high according to statistics
Peak load mainly appears on summer high-temperature season, and air conditioner load accounts for about 30% or so in midsummer electricity consumption peak load.Meanwhile air-conditioning
The area and the maximum area of electric load notch having the call, in summer thermally area (North China, East China, Central China and south China)
It is particularly evident.
However, network load duration of peak value is very short, often less than 1 minute.But if this moment Generation Side, power grid
Side can not meet the power demand of user side simultaneously, and power-management centre must take the mode of ordered electric or power cuts to limit consumption to limit
Certain customers' electricity consumption processed, to cut down user's side power load, it is ensured that power supply and demand balance.And user avoids the peak hour and rations the power supply the time usually not
Lower than 8 hours, both it had been unfavorable for the production and operation of enterprise customer and the life of resident, and had also been unfavorable for power grid enterprises and improves service
Quality.On long terms, then the more power plants of investment construction and power transmission and distribution facility are needed, is needed with coping with ever-increasing electric power
It asks.Hair, transmission facility are largely built for reply short time load peak, will lead to that equipment year utilization rate is low, and peak regulation is at high cost,
Cause hair power supply cost constantly soaring, causes the huge waste of social resources.For this reason, it may be necessary to pass through advanced effective technology solution
Certainly electric power " summer peak meeting " problem.Wherein, using air conditioner load as the main controlled plant of demand Side Management, dynamic is utilized
Demand response technology carries out systematization, networking, automation, intelligent adjusting to air conditioner load and participates in peak load regulation network, becomes
Alleviate the important channel of power grid supply and demand problem.
How user's side power load to be managed by technological means, may be supplied beyond power grid in electric load
When electric energy power, load is cut in safe range in time, is the project for being worth research to ensure electric power netting safe running.
Summary of the invention
The purpose of the present invention is to provide a kind of for cutting down the control method and control of the central air-conditioning of network load peak value
System processed, technical problems to be solved be can within a specified time reduce large and medium-sized central air-conditioning in target area electricity consumption it is negative
Lotus ensures electric power netting safe running to cut down network load peak value.
In order to solve the technical problem, the present invention is using a kind of for cutting down the controlling party of the central air-conditioning of network load peak value
Method, comprising: at least one air-conditioning centralized control center is at least established in each area, air-conditioning centralized control center passes through wired or wireless side
The regulator control system of the central air-conditioning for every solitary building that formula is managed with air-conditioning centralized control center is connect；By public network or dedicated
Network is connect with power-management centre；
The control method includes the following steps:
Step S1, the peak value of electric load is predicted in power-management centre, obtains the time corresponding to peak value, peak value
The power load charge values for needing to cut down when point and peak value, the time point according to corresponding to peak value establish peak period；
Step S2, before peak period arrival, power-management centre issues air-conditioning centralized control center and instructs, it is desirable that it is to institute
Current total power load value of the central air-conditioning of management is collected；Air-conditioning centralized control center is according to the maximum power load of reduction simultaneously
The central air-conditioning that the Optimal Operation Strategies of value calculate every solitary building of its management is currently used in peak value with the central air-conditioning
Electric load value, which is compared the power load value that can be cut down and is calculated in the total power load value that can be cut down, gives electric power tune
Degree center；
Step S3, it needs to cut down when whether total power load value that power-management centre judgement can be cut down is greater than peak value
Power load charge values；
Step S311, it needs to cut down when total power load value that judgement can be cut down when power-management centre is greater than peak value
When power load charge values, then the first operational order is sent to air-conditioning centralized control center, first operational order is power-management centre
The instruction for executing the Optimal Operation Strategies for cutting down power load value is sent to air-conditioning centralized control center；
Step S4, Optimal Operation Strategies are issued to regulator control system by air-conditioning centralized control center；Regulator control system is receiving optimization
After operation reserve, the chilled water water outlet temperature setting of the refrigeration machine of central air-conditioning is reduced before peak period reaches, while at peak
Corresponding Optimal Operation Strategies are run before the value period reaches and/or when peak period reaches.
Further, the method also includes step S5, after peak period terminates, regulator control system restores central air-conditioning
Normal operation and initial setting up.
Further, it the method also includes step S6, after peak period starts and/or after peak period, adjusts
The current power load value of central air-conditioning is reported to air-conditioning centralized control center by control system, and air-conditioning centralized control center is receiving current use
Current total power load value is calculated after electric load value reports to power-management centre.
Further, the method also includes step S321, when power-management centre judges that the total electricity consumption that can be cut down is negative
When the power load charge values for needing to cut down when charge values are less than or equal to peak value, then the second operational order is sent to air-conditioning centralized control center,
Second operational order is that each central air-conditioning presses the Optimal Operation Strategies execution for cutting down maximum power load value.
Further, the method also includes total power loads that step S322, power-management centre judge to cut down
Value needs the power load charge values cut down when being equal to or less than peak value, equal to thening follow the steps S323；
Step S323, it needs to cut down when power-management centre judges the total power load value that can be cut down equal to peak value
When power load charge values, is then sent to air-conditioning centralized control center and execute the Optimal Operation Strategies instruction for cutting down maximum power load value,
Step S4 is executed after executing the step S323.
Further, the method also includes step S324, power-management centres to judge that the total electricity consumption that can be cut down is negative
When the power load charge values for needing to cut down when charge values are less than peak value, then sends to execute to air-conditioning centralized control center and cut down maximum power load
The Optimal Operation Strategies of value are instructed while being found to be needed to cut down when can make up for it the total power load value that can be cut down with peak value
The differences of power load charge values make up strategy, step S4 is executed after executing the step S324.
Further, the Optimal Operation Strategies include that load factor is stopped transport or reduced to the refrigeration machine of central air-conditioning.
Further, the Optimal Operation Strategies specifically:
When currently there was only a refrigerator operation in central air-conditioning, then refrigeration machine is reduced in the load factor of peak period；
When currently there is 2 or more refrigeration machines running in central air-conditioning, between the minimum of the start-stop time of the refrigeration machine
It is K minutes every the time, the half of K minutes stoppage in transit refrigeration machine total quantitys before peak period terminates, and in peak period
Remaining refrigeration machine is stopped transport when beginning；
When central air-conditioning has 2 or more refrigeration machines running, in peak period to the stoppage in transit of refrigeration machine part.
Further, when large area blackout occur, power grid needing largely to subtract for load, power-management centre may be used also
Promptly stopped with being assigned to air-conditioning centralized control center for instruction, regulator control system of the air-conditioning centralized control center to all central air-conditioning managed
Stoppage in transit instruction is assigned, all central air-conditioning are shut down.
The invention also discloses a kind of for cutting down the control system of the central air-conditioning of network load peak value, the control system
System includes:
Power-management centre, for the peak value to electric load predicted to obtain time point corresponding to peak value, peak value,
The power load charge values for needing to cut down when peak value, and the time point according to corresponding to peak value establishes peak period and collects air-conditioning collection
The current total power load value for the central air-conditioning that control center is managed；
Air-conditioning centralized control center is collected for the current power load value to the central air-conditioning managed and summarizes calculating
It obtains sending in current total power load value to power-management centre, while plan is run according to the optimization for cutting down maximum power load value
Approximation calculate its management every solitary building central air-conditioning in peak value compared with the current power load value of the central air-conditioning
The power load value that can cut down simultaneously summarizes to be calculated in the total power load value that can be cut down and gives power-management centre, phase
Ying Di, compared with the power load charge values that power-management centre needs to cut down when the peak value according to the total power load value that can be cut down
As a result, sending operational order to air-conditioning centralized control center；Air-conditioning centralized control center will optimize operation after receiving operational order accordingly
Policy distribution is to regulator control system；
Regulator control system, for carrying out control to central air-conditioning and sending the current use of central air-conditioning in air-conditioning centralized control center
Electric load value, and after receiving the Optimal Operation Strategies that air-conditioning centralized control center issues, regulator control system is before peak period arrival
The chilled water water outlet temperature setting of the refrigeration machine of central air-conditioning is reduced, while reaching preceding and/or peak period in peak period and arriving
Up to when execute corresponding Optimal Operation Strategies；The regulator control system is connected by wired or wireless mode and air-conditioning centralized control center
It connects.
Compared with prior art, the present invention using when peak period is reached to the refrigeration machine of central air-conditioning carry out stop transport or
It reduces load factor and water outlet temperature setting is reduced to the refrigeration machine of central air-conditioning using before peak period reaches, to cut down
The power load of peak period, ensures the safe operation of power grid.
Detailed description of the invention
Fig. 1 is the flow chart of the method for the present invention；
Fig. 2 is present system block diagram；
Refrigeration machine changed power figure when Fig. 3 is the first optimization operation of the present invention；
Refrigeration machine changed power figure when Fig. 4 is the present invention second of optimization operation；
Fig. 5 is the refrigeration machine changed power figure that 1 refrigeration machine is shut down when the third optimization operation of the present invention；
Fig. 6 is the refrigeration machine changed power figure that 2 refrigeration machines are shut down when the third optimization operation of the present invention；
Fig. 7 is the refrigeration machine changed power figure that 3 refrigeration machines are shut down when the third optimization operation of the present invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2, the invention discloses a kind of for cutting down the central air-conditioning controlling party of network load peak value
Method, comprising:
At least one air-conditioning centralized control center is at least established in each area, air-conditioning centralized control center passes through wired or wireless side
The regulator control system of the central air-conditioning for every solitary building that formula is managed with air-conditioning centralized control center is connect；Air-conditioning centralized control center passes through public affairs
Common network network or dedicated network are connect with power-management centre, and the central air-conditioning is specially large and medium-sized water cooling type central air-conditioning；
Power-management centre is area power grid power-management centre.
Central air-conditioning that each air-conditioning centralized control center is managed forms a region, the area can for one it is at county level or
City above county level, region can be the administrative division in city.
Described method includes following steps:
Step S1, the peak value of electric load is predicted in power-management centre, obtains the time corresponding to peak value, peak value
The power load charge values for needing to cut down when point and peak value, the time point according to corresponding to peak value establish peak period；
The peak period is that the front and back of time point corresponding to peak value respectively extends not more than Δ t minutes, such as peak value institute is right
The time point answered is 15:45 points, and Δ t=3, then peak period is between 15:42-15:48 (according to the need of different urban distribution networks
Ask the value and peak period of determining Δ t)；
Step S2, before peak period arrival, power-management centre issues air-conditioning centralized control center and instructs, it is desirable that it is to institute
The current power load value of the central air-conditioning of management, which is collected and summarizes, gives electric power tune in the current total power load value of calculating
Degree center；Air-conditioning centralized control center calculates every managed according to the Optimal Operation Strategies for cutting down maximum power load value simultaneously
The power load value that the central air-conditioning of building can be cut down compared with the central air-conditioning current power load value in peak value is simultaneously
It is calculated in the total power load value that can be cut down and gives power-management centre；Specially preceding 1 at least is reached in peak period
Hour, air-conditioning centralized control center calculates the every solitary building managed according to the Optimal Operation Strategies for cutting down maximum power load value
The power load value that can be cut down compared with the central air-conditioning current power load value in peak value of central air-conditioning and calculate
Power-management centre is given on to the total power load value that can be cut down；Work as to the central air-conditioning managed air-conditioning centralized control center
Preceding power load value, which is collected and summarizes, gives power-management centre in the current total power load value of calculating；Current total use
Electric load value converges the current power load value of the central air-conditioning of the every solitary building managed by air-conditioning centralized control center
It must arrive；
Step S3, it needs to cut down when whether total power load value that power-management centre judgement can be cut down is greater than peak value
Power load charge values；It is to then follow the steps S311；It is no to then follow the steps S321；
Step S311, it needs to cut down when total power load value that judgement can be cut down when power-management centre is greater than peak value
When power load charge values, then the first operational order is sent to air-conditioning centralized control center, first operational order is power-management centre
The instruction for executing the Optimal Operation Strategies for cutting down power load value is sent to air-conditioning centralized control center；In above-mentioned reduction power load
The Optimal Operation Strategies of value are one of 3 kinds of Operation Mode Optimizations in Optimal Operation Strategies, preferred selection order is the 1st kind,
3rd kind, the 2nd kind, but selection result should ensure that total power load cut down and need to cut down when power load value is equal to or more than peak value
Charge values；
Step S4, Optimal Operation Strategies are issued to regulator control system by air-conditioning centralized control center；Regulator control system is receiving optimization
After operation reserve, the chilled water water outlet temperature setting of the refrigeration machine of central air-conditioning is reduced before peak period reaches, while at peak
Corresponding Optimal Operation Strategies are run before the value period reaches and/or when peak period reaches；Specially preceding 1 is reached in peak period
Hour reduces the chilled water water outlet temperature setting of the refrigeration machine of central air-conditioning；The adjusting of chilled water water outlet temperature setting can be according to reality
Border situation carries out, such as reduces 1-2 DEG C, so as to guarantee that the refrigeration machine of the central air-conditioning in peak period is being stopped transport or reduced
The cooling supply that central air-conditioning is nor affected on when load factor guarantees that central air-conditioning can satisfy use demand.
The method also includes step S5, after peak period terminates, regulator control system restore central air-conditioning normal fortune
Capable and initial setting up；It is described to operate normally to cancel the refrigeration machine of setting or the stoppage in transit of Central Air-condition Refrigerator load factor and opening again
It opens；The water outlet temperature setting for being initially set to the chilled water before central air-conditioning is not carried out Optimal Operation Strategies.
The method also includes step S6, after peak period starts and/or after peak period, regulator control system will
The current power load value of central air-conditioning reports to air-conditioning centralized control center, and air-conditioning centralized control center is receiving current power load value
After summarize and calculate current total power load value and report to power-management centre, the current power of central air-conditioning described here is negative
Charge values are power load value of the central air-conditioning at the moment.
Be less than the method also includes step S321, when the power-management centre total power load value that can cut down of judgement or
When the power load charge values for needing to cut down when equal to peak value, then the second operational order, second behaviour are sent to air-conditioning centralized control center
Making instruction is that each central air-conditioning presses the Optimal Operation Strategies for cutting down maximum power load value；
It is the 1st kind or the 2nd in Optimal Operation Strategies in the Optimal Operation Strategies of the above-mentioned maximum power load value of reduction
Kind Operation Mode Optimization；
Step S322, it needs to cut when total power load value that power-management centre judgement can be cut down is equal to or less than peak value
The power load charge values subtracted, equal to thening follow the steps S323；Less than thening follow the steps S324；
Step S323, it needs to cut down when power-management centre judges the total power load value that can be cut down equal to peak value
When power load charge values, is then sent to air-conditioning centralized control center and execute the Optimal Operation Strategies instruction for cutting down maximum power load value,
Step S4 is executed after executing the step S323；
Step S324, it needs to cut down when power-management centre judges the total power load value that can be cut down less than peak value
When power load charge values, is then sent to air-conditioning centralized control center and execute the Optimal Operation Strategies instruction for cutting down maximum power load value simultaneously
It finds and can make up for it making up for the total power load value that can be cut down and needs are cut down when peak value the difference of power load charge values
Strategy executes step S4 after executing the step S324；The strategy that makes up includes rationing the power supply to the industrial and commercial enterprises in area
Mode, however, the present invention is not limited thereto, making up strategy can also ration the power supply mode for other routines used by power-management centre.
The calculating of above-mentioned difference, it can be understood as need to cut down when the total power load value that can be cut down is subtracted peak value
When the result of power load charge values is the negative less than 0, then it is assumed that the central air-conditioning that air-conditioning centralized control center is managed is executing accordingly
Optimal Operation Strategies after the power load charge values that need to cut down when being unable to satisfy peak value；And result is when being nonnegative number, then it is assumed that empty
The electric power that the central air-conditioning for adjusting centralized control center to be managed needs to cut down when meeting peak value after executing corresponding Optimal Operation Strategies
Load value.
To reduce the impact of the start and stop simultaneously of a large amount of refrigeration units or adjustment load factor to power grid, air-conditioning centralized control center can lead to
It crosses and is precisely controlled, the start and stop or load factor adjustment time of different refrigeration machines in the same power supply line that is staggered as far as possible.Such as in the mansion A
The refrigeration machine of centre air-conditioning is shut down in 15:42:00, and the refrigeration machine of the side mansion B central air-conditioning is then shut down in 15:42:10.
As one embodiment of the present invention, when there is large area blackout, power grid needing largely to subtract for load,
Power-management centre can also be assigned to air-conditioning centralized control center promptly stops for instruction, air-conditioning centralized control center to managed it is all in
The regulator control system of centre air-conditioning assigns stoppage in transit instruction, shuts down all central air-conditioning, including refrigeration machine, blower, water pump etc., in this way can be with
Only subtract the load for central air-conditioning, and whole loads of non-user.It is equally to stop for sub-load, if being only center in area
Air-conditioning system is out of service, and other equipment such as illumination, elevator are still normal, and such case is better than the confession of region inner part custom power
Answer the state of full cut-off.
The Optimal Operation Strategies include: that load factor is stopped transport or reduced to the refrigeration machine of central air-conditioning；Specifically:
1, when currently there was only a refrigerator operation in central air-conditioning, then refrigeration machine is reduced in the load factor of peak period；
Aforesaid way can make the central air-conditioning cut down maximum power load value.
Assuming that refrigeration machine rated input power is W, load factor minimum value is θmin, present load rate actual value is θ0, freezing
Water leaving water temperature actual value is C0
Current refrigeration machine actually enters power=W* θ0
If T1For the time point where peak value, peak period is [T1Δ t, T1+ Δ t], when a length of 2 Δ t, wherein Δ t=3
Minute.Then 60 minutes (i.e. T before peak period1Δ t-60) the chilled water water outlet temperature setting of refrigeration machine turned down 1-2 DEG C
It (is determined according to the factors such as current outdoor temperature and user's cooling needs, outdoor temperature is high, user's cooling needs are big, can turn down 2
℃；Outdoor temperature is not high, user's cooling needs are little, then can turn down 1 DEG C), in peak period time started (T1Δ t) will make
Cold load factor is set in θmin, until chilled water leaving water temperature rises to C0It (should be in T at this time1+ Δ t (i.e. peak period knot
The beam time) later, because 2 this period of Δ t are shorter), stop the setting of refrigeration machine low-load rate and restores chilled water
The initial setting of leaving water temperature restores to operate normally.In refrigeration machine still in the case where operating, chilled water leaving water temperature rises 1
Or 2 DEG C of time will be greater than 6 minutes.
In this way in peak period [T1Δ t, T1+ Δ t], refrigeration machine actually enters power i.e. power load and reduces W* (θ0‐
θmin)。
Citing:
As shown in figure 3, being equipped with 500 kilowatts of cold rated input power, load factor minimum value is 50%, it is contemplated that peak value moment
For 15:45, peak period 15:42-15:48.Chilled water leaving water temperature is 7 DEG C before 14:42, and load factor 80% is that is, electric
Input power is 400 kilowatts.Chilled water water outlet temperature setting is adjusted to 5 DEG C in 14:42, load factor is promoted to 100%, and with
Chilled water leaving water temperature reduce and gradually decline, in this way will to 15:42 chilled water leaving water temperature at the beginning of peak period
5 DEG C are reached or approached, can have been reduced in central air conditioner system, chiller load rate is set as 50% at this time, chilled water water outlet
Temperature starts to gradually rise, and when it rises to 7 DEG C (usually after 30 minutes or longer time), it is low to terminate refrigeration machine
The setting of load factor, chilled water water outlet temperature setting is 7 DEG C, restores to operate normally.In this way in time to peak section 15:42-15:48
In this 6 minutes, electromechanical input power of freezing is 500*50%=250 kilowatts, compared with 14:42, reduces 150 kilowatts and (cuts down
Ratio=150/400=37.5%).
For central air conditioner user, there is certain cooling capacity due to inherently storing in circulation, and turn down in advance
Chilled water temperature, reduce in air-conditioning system can, it is to customer impact little in half an hour.
2, when currently there is 2 or more refrigeration machines running in central air-conditioning, the start and stop minimum time interval of refrigeration machine is K
Minute, (refrigeration machine is unable to frequent start-stop, otherwise will affect its service life.Therefore, the start and stop minimum time interval of the refrigeration machine,
Refer to the start and stop most short interval time set to avoid frequent start-stop from causing adverse effect to refrigeration machine.It is equipped with cold start and stop most
The closely-spaced time is K minutes, i.e., after refrigeration machine is opened, can just shut down after at least running K minutes；And after refrigeration machine is shut down, equally
It needs just be again turned on after K minutes, generally 20-30 minutes K minutes.) then 60 minutes before peak period will freezing
Water water outlet temperature setting turns down 2 DEG C, K minutes (the i.e. T before peak period terminates1+ Δ t-K) two points of stoppage in transit refrigeration machine total quantity
One of, and remaining refrigeration machine is stopped transport when peak period starts, thus in all refrigeration machines of peak period stoppage in transit.First shut down
Half refrigeration machine reach exactly to the time point (T that peak period terminates after start and stop minimum time interval K minutes1+Δ
T), it reopens, chilled water water outlet temperature setting is 2 DEG C still lower than normal level.The half refrigeration machine shut down afterwards, most by start and stop
It after closely-spaced time K minutes, also reopens, and the chilled water water outlet temperature setting of whole refrigeration machines is reverted into normal water
Flat, central air-conditioning restores to operate normally.
Aforesaid way can make the central air-conditioning cut down maximum power load.
Assuming that refrigeration machine be A (1), A (2) ... chilled water water outlet temperature setting is turned down 2 DEG C in 60 minutes in advance by A (n),
Reaching peak period terminates preceding K minutes (T1+ Δ t-K) it closes no more than half refrigeration machine A (1)-A ([n/2]), in peak value
(T when period starts1Δ t) also all closes remaining refrigeration machine A ([n/2]+1)-A (n) in operation, in peak period knot
(T when beam1+ Δ t), refrigeration machine A (the 1)-A ([n/2]) first shut down is opened, and chilled water water outlet temperature setting still compares normal level
Low 2 DEG C；K minutes (the T after peak period starts1Δ t+K) refrigeration machine A ([n/2]+1)-A (n) of rear stoppage in transit is also opened, entirely
The chilled water water outlet temperature setting of portion's refrigeration machine reverts to normal level, and central air-conditioning restores to operate normally.
Citing:
As shown in figure 4, setting n=4, totally 4 refrigeration machines, rated input power are 500 kilowatts, start and stop minimum time interval
K is 30 minutes, 7 DEG C of chilled water leaving water temperature before 14:42, load factor 80%.In 14:42 by chilled water water outlet temperature setting
It is 5 DEG C；Refrigeration machine A (1), A (2) are closed in 15:18；Remaining refrigeration machine A (3), A (4) in operation is also all closed in 15:42
It closes；Refrigeration machine A (1), A (2) are opened in 15:48, chilled water water outlet temperature setting is 5 DEG C；In 16:12 by the refrigeration machine of stoppage in transit
A (3), A (4) are opened, and the chilled water water outlet temperature setting of whole refrigeration machine A (1)-A (4) reverts to 7 DEG C.
In this way within time to peak section 15:42-15:48 this period, refrigeration machine power can cut down 1600 kilowatts and (cut down
100%) ratio is.
For central air conditioner user, only made in 15:18-15:42,15:48-16:12 are 48 minutes total by 4
Cold refrigeration, 1600 kilowatts of general power, become 1000 kilowatts of 2 refrigeration machine coolings, general power, refrigeration machine power has dropped
37.5%, the time for shutting down whole refrigeration machines only has 6 minutes.Have centainly due to inherently being stored in the circulation of central air-conditioning
Cooling capacity, and turned down chilled water temperature in advance, reduce in air-conditioning system can, in the case where water pump, blower run well,
Though the cooling ability of air-conditioning system is declined slightly, user's comfort is had some impact on, but still it is acceptable.
3, it when central air-conditioning has 2 or more refrigeration machines running, can stop transport in peak period to refrigeration machine part, it is described
It is that an at least refrigeration machine continues to run that part, which is stopped transport, and remaining refrigeration machine is stopped transport；
The method is suitable for the situation that power-management centre requires the power load charge values cut down in peak period little.
Assuming that the refrigeration machine of central air-conditioning is A (1), A (2) ... the chilled water of refrigeration machine is discharged by A (n) for 60 minutes in advance
Temperature setting turns down 1-2 DEG C；In peak period time started (T1Δ t) shuts down m platform refrigeration machine (1≤m≤n-1), by opening
It is then turned on after stopping minimum time interval K minutes, while whole refrigeration machine chilled water water outlet temperature settings is reverted into normal level.
In this way, in [(T1Δ t), (T1Δ t)+K] this period, oepration at full load used electric work by (n-m) platform refrigeration machine
Rate is W* (n-m), compared with executing before Optimal Operation Strategies, reduction plans value=W*n* θ0‐W*(n‐m)
Citing:
If n=4, totally 4 refrigeration machines, rated input power are 500 kilowatts, the chilled water leaving water temperature 7 before 14:42
DEG C, load factor 80%.M can be 1,2 or 3.
As shown in figure 5, within 15:42-16:12 this period, refrigeration machine actually enters power and can cut down as m=1
500*4*80%-500*3=100 kilowatts (cutting down ratio=100/1600=6.25%).
As shown in fig. 6, within 15:42-16:12 this period, refrigeration machine power can cut down 500*4* as m=2
80%-500*2=600 kilowatts (cutting down ratio=600/1600=37.5%).
As shown in fig. 7, within 15:42-16:12 this period, refrigeration machine power can cut down 500*4* when m=3
80%-500=1100 kilowatts (cutting down ratio=1100/1600=68.75%).
With the increase for shutting down refrigeration machine number of units, the power load charge values of reduction also increase, the influence to user's comfort
Accordingly it increased.But due to turning down chilled water temperature setting in advance, reducing energy in air-conditioning system, still have in 30 minutes
Certain cooling ability, therefore, influence to user's comfort should or acceptable.
In addition, with shutting down for refrigeration machine, corresponding cooling pump can also close for most central air conditioner systems
It closes, but the electric power of water pump is more much smaller than refrigeration machine, thus is not considered temporarily when calculated load reduction value.
Run by optimization in about 1 hour, in region central air-conditioning the period [T1- Δ t, T1+ Δ t] will according to
Electric load minimum or lesser mode are run.At this point, the power load of each central air-conditioning is collected by air-conditioning centralized control center, summarize
Obtain total power load of the central air-conditioning at current time in region, by report power-management centre.
Large and medium-sized central air-conditioning is freezed using water cooler mostly, mainly by refrigeration machine, cooling water recirculation system,
The composition such as water circulation system, cooling tower, fan coil system and fresh air system is freezed, and has computer, control electric appliance, adjust member
The intelligence control system of the compositions such as part, instrument, sensor and auxiliary device is monitored and controls to the operation of central air-conditioning.
Refrigeration work principle: the water temperature of chilled water system is reduced by refrigeration machine, then by water pump, blower, using chilled water as carrier
Send cooling capacity in each layer, each room of building.Therefore, central air-conditioning refrigeration output with electricity input compared with have one it is stagnant
Afterwards.Such as an office building, the working of eight thirty of the morning, that central air-conditioning should just be switched at eight, with guarantee at eight half can be with
Cooling supply；5 PM half is come off duty, and 5 points can shut down refrigeration machine, is only operated with water pump, blower, can be using in water system
Cooling capacity for being as cold as five thirty.In addition, being usually constructed with multiple chillers in a set of central air conditioner system, the power of refrigeration machine accounts for about
2/3rds of central air conditioner system general power.If it is water cool-storage technology or ice-storage air-conditioning, as long as abundant cold-storage, even if system
The cold long period stops transport, only water pump, blower operating, also can guarantee the cooling supply to user.Refrigeration machine does not answer frequent start-stop, but
For most of refrigeration unit, as long as opening, stopping being spaced in 20-30 minutes or more, do not influence.
As shown in Fig. 2, the control system of the central air-conditioning for cutting down network load peak value of the invention includes:
Power-management centre, for the peak value to electric load predicted to obtain time point corresponding to peak value, peak value,
The power load charge values for needing to cut down when peak value, and the time point according to corresponding to peak value establishes peak period and collects air-conditioning collection
The current total power load value for the central air-conditioning that control center is managed；
The peak period is that the front and back of time point corresponding to peak value respectively extends not more than Δ t minutes, such as peak value institute is right
The time point answered is 15:45 points, and Δ t=3, then peak period is between 15:42-15:48；
Air-conditioning centralized control center, the current power load value for the central air-conditioning to the every solitary building managed are received
Collect and summarize to be calculated in current total power load value and send to power-management centre, while according to the maximum power load value of reduction
Optimal Operation Strategies calculate the central air-conditioning of the every solitary building managed in peak value with the current use of the central air-conditioning
Electric load value, which compares the power load value that can be cut down and summarizes to be calculated in the total power load value that can be cut down, gives electricity
Power control centre, correspondingly, the electricity for needing to cut down when power-management centre is according to the total power load value and peak value that can be cut down
The comparison result of power load value sends operational order to air-conditioning centralized control center；It air-conditioning centralized control center will after receiving operational order
Corresponding Optimal Operation Strategies are issued to regulator control system；
The electric load for needing to cut down when the power-management centre is according to the total power load value and peak value that can be cut down
The comparison result of value includes: to need to cut down when total power load value that power-management centre judgement can be cut down is greater than peak value
When power load charge values, power-management centre sends the first operational order to air-conditioning centralized control center；Air-conditioning centralized control center receives
Optimal Operation Strategies are issued to regulator control system after one operational order, first operational order is power-management centre to air-conditioning
Centralized control center sends the instruction for executing Optimal Operation Strategies；And when the total power load value that can be cut down is less than or equal to peak value
When need to cut down power load charge values when, then send the second operational order to air-conditioning centralized control center, second operational order is
Each central air-conditioning presses the Optimal Operation Strategies for cutting down maximum power load value, and correspondingly, power-management centre, which also judges to work as, is somebody's turn to do
When the power load charge values for needing to cut down when the total power load value that can be cut down is equal to peak value, then sends and hold to air-conditioning centralized control center
Row cuts down the Optimal Operation Strategies instruction of maximum power load value；
As an implementation, it is at least reached first 1 hour in peak period, the center that air-conditioning centralized control center will be managed
The current power load value of air-conditioning, which is collected and summarizes to be calculated in current total power load value, gives power-management centre；
Current total power load value is by air-conditioning centralized control center to the current power of the central air-conditioning of the every solitary building managed
Load value is summarized to obtain；The air-conditioning centralized control center and power-management centre pass through public network or dedicated Internet access；
Regulator control system, for carrying out control to central air-conditioning and sending the current use of central air-conditioning in air-conditioning centralized control center
Electric load value, and after receiving the Optimal Operation Strategies that air-conditioning centralized control center issues, regulator control system is before peak period arrival
The chilled water water outlet temperature setting of the refrigeration machine of central air-conditioning is reduced, while reaching preceding and/or peak period in peak period and arriving
Up to when execute corresponding Optimal Operation Strategies；The regulator control system is connected by wired or wireless mode and air-conditioning centralized control center
It connects；
As another embodiment, regulator control system reaches the first 1 hour refrigeration machine for reducing central air-conditioning in peak period
Chilled water leaving water temperature setting；The adjusting of chilled water water outlet temperature setting can carry out according to the actual situation, such as reduce 1-2
℃。
The current power load value is one of central air-conditioning before peak period, in peak period or after peak period
The power load value at time point；
The air-conditioning centralized control center establishes at least each area, and the central air-conditioning is specially large and medium-sized water cooling type
Central air-conditioning；
Central air-conditioning that each air-conditioning centralized control center is managed forms a region, the area can for one it is at county level or
City above county level, region can be the administrative division in city.
The power load that the power-management centre also needs to cut down when the total power load value that can be cut down is less than peak value
When charge values, is sent to air-conditioning centralized control center and execute the Optimal Operation Strategies instruction for cutting down maximum power load value, while electric power tune
The electric load for needing to cut down when can make up for it the total power load value that can be cut down and peak value is found as needed in degree center
The difference of value makes up strategy；The strategy that makes up includes the mode rationed the power supply to industrial and commercial enterprises in area, but the present invention is not
It is limited to this, making up strategy can also ration the power supply mode for other routines used by power-management centre.
It is the 1st in Optimal Operation Strategies in the present invention in the Optimal Operation Strategies of the above-mentioned maximum power load value of reduction
Kind or the 2nd kind of Operation Mode Optimization.
The regulator control system is also used to restore after peak period terminates the normal operation and initial setting up of central air-conditioning；
It is described to operate normally to cancel the refrigeration machine of setting or the stoppage in transit of Central Air-condition Refrigerator load factor and reopening；It is described initially to set
It is set to the chilled water water outlet temperature setting of the refrigeration machine before central air-conditioning is not carried out Optimal Operation Strategies.
The regulator control system is also used to after peak period starts and/or after peak period, by working as central air-conditioning
Preceding power load value reports to air-conditioning centralized control center, and correspondingly, air-conditioning centralized control center converges after receiving current power load value
It always calculates current total power load value and reports to power-management centre, the current power load value of central air-conditioning described here
For central air-conditioning the moment power load value.
The regulator control system is also used to the related data and operating parameter and the phase that will be collected into of real-time collecting central air-conditioning
It closes data and operating parameter reports to air-conditioning centralized control center.
The air-conditioning centralized control center is also used to carry out central air-conditioning according to the related data and operating parameter of real-time collecting
It monitors in real time and remote control and regulation is carried out to central air-conditioning；Correspondingly, regulator control system is sent long-range according to air-conditioning centralized control center
Central air-conditioning is adjusted in adjustment signal.
The related data and operating parameter include chiller load rate, actually enter power and indoor and outdoor temperature and humidity, visitor
Family set temperature, chilled water water outlet temperature setting etc.；Carrying out remote control and regulation to central air-conditioning includes each section power-equipment start-stop
The parameter settings such as machine, adjustment chilled water leaving water temperature, so as to adjust the method for operation of central air-conditioning.
As shown in Fig. 2, the air-conditioning centralized control center includes first communication module, second communication module, acquisition module, control
Module and memory module, in which:
First communication module is used to establish with power-management centre and be connected to the network, using public network or dedicated network and electricity
The connection of power control centre, first communication module send current total power load value on power-management centre and can cut down total
Power load value receives the operational order that power-management centre is sent simultaneously；First communication module is connect with control module, described
Current total power load value be included in peak period before, in peak period or after peak period, air-conditioning centralized control center is managed
Total power load value of the central air-conditioning at the moment；
Second communication module be used for regulator control system connection communication, by the way of wired or wireless with regulator control system connect
It connects, second communication module receives the current power load value sent on regulator control system and sends optimization operation plan to regulator control system
Slightly；The Optimal Operation Strategies have been described in detail in the foregoing, and details are not described herein；
Acquisition module is used to send second communication module current power load value and is collected and is sent to control module；
The acquisition module is connect with second communication module and control module respectively；
Current total power load value is calculated for summarize to current power load value in control module, and according to
Cut down maximum power load value Optimal Operation Strategies calculate its management every solitary building central air-conditioning in peak value with
The central air-conditioning current power load compares the power load value that can be cut down and the total power load that can be cut down is calculated
The total power load value that can be cut down and current total power load value are sent to first communication module by value, control module；Control
Current power load value, current total power load value, the total power load value that can be cut down also are sent to storage mould by molding block
Block is stored；The operational order that control module is also used to be sent according to power-management centre leads to Optimal Operation Strategies through second
Letter module is sent to regulator control system；
Memory module for storing data, the data include current power load value, current total power load value, can be with
The total power load value cut down.
Second communication module is also used to receive the related data and operating parameter of the central air-conditioning sent on regulator control system；Accordingly
The related data of the central air-conditioning received and operating parameter are sent to control module by ground, acquisition module, control module will in
The related data for entreating air-conditioning and operating parameter storage in a storage module, while carrying out far central air-conditioning through second communication module
Journey regulation.
The power-management centre, which is also used to assign to air-conditioning centralized control center, promptly stops for instruction, correspondingly, air-conditioning collection control
Center receive promptly stop for instruction after to the regulator control systems of all central air-conditioning managed assign stoppage in transit instruction, shut down
The all devices of air-conditioning are entreated, equipment includes refrigeration machine, blower, water pump etc., it can only subtract the load for central air-conditioning in this way, rather than
Whole loads of user.It is equally to stop for sub-load, if being only that central air conditioner system is out of service in area, illumination, electricity
Other equipment such as ladder are still normal, and such case is better than the state that local divides custom power supply full cut-off.
In the present invention, air-conditioning centralized control center further includes human-computer interaction module, for carrying out human-computer interaction, display and input
Parameter setting；Display includes current power load value, current total power load value, the related data of central air-conditioning and operation ginseng
Number.
The present invention is used to central air-conditioning Centralized Monitoring, network load peak value can in time, be effectively cut down, to reduce
The construction investment of power grid, power plant, has saved the energy and resource, has huge environmental benefit and social benefit.
Claims (10)
1. a kind of for cutting down the control method of the central air-conditioning of network load peak value, it is characterised in that: include: at least each
At least one air-conditioning centralized control center is established in area, air-conditioning centralized control center passes through wired or wireless way and institute of air-conditioning centralized control center
The regulator control system connection of the central air-conditioning of every solitary building of management；Pass through public network or dedicated network and power-management centre
Connection；
The control method includes the following steps:
Step S1, the peak value of electric load is predicted in power-management centre, obtain time point corresponding to peak value, peak value with
And the power load charge values for needing to cut down when peak value, the time point according to corresponding to peak value establish peak period；
Step S2, before peak period arrival, power-management centre issues air-conditioning centralized control center and instructs, it is desirable that it is to being managed
Current total power load value of central air-conditioning be collected；Air-conditioning centralized control center is according to the maximum power load value of reduction simultaneously
The central air-conditioning that Optimal Operation Strategies calculate every solitary building of its management is negative with the central air-conditioning current power in peak value
Charge values are compared the power load value that can be cut down and are calculated in the total power load value that can be cut down and give in power scheduling
The heart；
Step S3, the electric power for needing to cut down when whether total power load value that power-management centre judgement can be cut down is greater than peak value
Load value；
Step S311, the electric power for needing to cut down when total power load value that judgement can be cut down when power-management centre is greater than peak value
When load value, then the first operational order is sent to air-conditioning centralized control center, first operational order is power-management centre to sky
Centralized control center is adjusted to send the instruction for executing the Optimal Operation Strategies for cutting down power load value；
Step S4, Optimal Operation Strategies are issued to regulator control system by air-conditioning centralized control center；Regulator control system is receiving optimization operation
After strategy, the chilled water water outlet temperature setting of the refrigeration machine of central air-conditioning is reduced before peak period reaches, while in peak value
Corresponding Optimal Operation Strategies are run before section reaches and/or when peak period reaches.
2. according to claim 1 for cutting down the control method of the central air-conditioning of network load peak value: it is characterized by:
The method also includes step S5, after peak period terminates, regulator control system restores the normal operation of central air-conditioning and initial
Setting.
3. according to claim 2 for cutting down the control method of the central air-conditioning of network load peak value: it is characterized by:
The method also includes step S6, after peak period starts and/or after peak period, regulator control system is by central air-conditioning
Current power load value reports to air-conditioning centralized control center, and air-conditioning centralized control center calculates after receiving current power load value to work as
Preceding total power load value reports to power-management centre.
4. according to claim 1 for cutting down the control method of the central air-conditioning of network load peak value: it is characterized by:
The method also includes step S321, when power-management centre judges that the total power load value that can be cut down is less than or equal to peak value
When need to cut down power load charge values when, then send the second operational order to air-conditioning centralized control center, second operational order is
Each central air-conditioning presses the Optimal Operation Strategies execution for cutting down maximum power load value.
5. according to claim 4 for cutting down the control method of the central air-conditioning of network load peak value: it is characterized by:
When being equal to or less than peak value the method also includes total power load value that step S322, power-management centre judgement can be cut down
The power load charge values for needing to cut down, equal to thening follow the steps S323；
Step S323, power-management centre judges the electric power for needing to cut down when the total power load value that can be cut down is equal to peak value
When load value, is then sent to air-conditioning centralized control center and execute the Optimal Operation Strategies instruction for cutting down maximum power load value, executed
Step S4 is executed after complete step S323.
6. according to claim 5 for cutting down the control method of the central air-conditioning of network load peak value: it is characterized by:
Needs when judging that the total power load value that can be cut down is less than peak value the method also includes step S324, power-management centre
When the power load charge values of reduction, then refer to the Optimal Operation Strategies that air-conditioning centralized control center sends the maximum power load value of execution reduction
Enable while finding the difference for the power load charge values for needing to cut down when can make up for it the total power load value that can be cut down and peak value
Make up strategy, after executing the step S324 execute step S4.
7. according to claim 1 for cutting down the control method of the central air-conditioning of network load peak value described in -6 any one,
It is characterized by: load factor is stopped transport or reduced to the refrigeration machine that the Optimal Operation Strategies include central air-conditioning.
8. according to claim 7 for cutting down the control method of the central air-conditioning of network load peak value, it is characterised in that:
The Optimal Operation Strategies specifically:
When currently there was only a refrigerator operation in central air-conditioning, then refrigeration machine is reduced in the load factor of peak period；
When currently there is 2 or more refrigeration machines running in central air-conditioning, when the minimum interval of the start-stop time of the refrigeration machine
Between be K minutes, the half of K minutes stoppage in transit refrigeration machine total quantitys before peak period terminates, and starting in peak period
When remaining refrigeration machine is stopped transport；
When central air-conditioning has 2 or more refrigeration machines running, in peak period to the stoppage in transit of refrigeration machine part.
9. according to claim 1 for cutting down the control method of the central air-conditioning of network load peak value, it is characterised in that:
When large area blackout occur, power grid needing largely to subtract for load, power-management centre can also be to air-conditioning centralized control center
It assigns and promptly stops for instruction, air-conditioning centralized control center assigns stoppage in transit instruction to the regulator control system of all central air-conditioning managed, closes
Stop all central air-conditioning.
10. a kind of for cutting down the control system of the central air-conditioning of network load peak value, it is characterised in that: the control system packet
It includes:
Power-management centre is predicted to obtain time point corresponding to peak value, peak value, peak value for the peak value to electric load
When need the power load charge values cut down, and the time point according to corresponding to peak value establishes peak period and collects in the control of air-conditioning collection
The current total power load value for the central air-conditioning that the heart is managed；
Air-conditioning centralized control center, is collected and summarizes for the current power load value to the central air-conditioning managed and be calculated
It send in current total power load value to power-management centre, while according to the Optimal Operation Strategies meter for cutting down maximum power load value
The central air-conditioning for calculating every solitary building of its management can be with compared with the current power load value of the central air-conditioning in peak value
The power load value of reduction simultaneously summarizes to be calculated in the total power load value that can be cut down and gives power-management centre, accordingly
Ground, knot compared with the power load charge values that power-management centre needs to cut down when the peak value according to the total power load value that can be cut down
Fruit sends operational order to air-conditioning centralized control center；Air-conditioning centralized control center will optimize operation plan after receiving operational order accordingly
Slightly it is issued to regulator control system；
Regulator control system, the current power for carrying out control to central air-conditioning and send central air-conditioning in air-conditioning centralized control center are negative
Charge values, and after receiving the Optimal Operation Strategies that air-conditioning centralized control center issues, regulator control system reduces before peak period reaches
The chilled water water outlet temperature setting of the refrigeration machine of central air-conditioning, while before peak period reaches and/or when peak period reaches
Execute corresponding Optimal Operation Strategies；The regulator control system is connect by wired or wireless mode with air-conditioning centralized control center.
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