CN107588453A - A kind of heat supply network balance regulation system - Google Patents
A kind of heat supply network balance regulation system Download PDFInfo
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- CN107588453A CN107588453A CN201710978069.5A CN201710978069A CN107588453A CN 107588453 A CN107588453 A CN 107588453A CN 201710978069 A CN201710978069 A CN 201710978069A CN 107588453 A CN107588453 A CN 107588453A
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Abstract
The present invention relates to a kind of heat supply network balance regulation system, what is solved is the technical problem that hydraulic misadjustment solution is never thorough, outdoor temperature changes interference, by using including field apparatus, the first host computer, communication network is passed sequentially through with field apparatus and the first host computer, the whole network balance module that data/address bus is connected, the whole network balance module is arranged on the server in the second host computer；The field apparatus includes being arranged at the first sensor once netted, motor-driven valve and distributed variable frequency pump, and second sensor, water circulating pump and the water charging system of secondary network are arranged at, and for controlling electrically operated valve, distributed variable frequency pump and the field controller of water charging system；First sensor includes the technical scheme of outdoor temperature sensor with second sensor, the problem is preferably resolved, available in the heat supply network balance regulation of central heating.
Description
Technical field
The present invention relates to heating system field, and in particular to a kind of heat supply network balance regulation system.
Background technology
Concentrated supply of heating in the city is a kind of preferable heat-supplying mode, has the characteristics that comfortable, energy-saving and environmental protection, safe.City is built
The heating system built more and more is solved by the way of central heating.Due to the continuous expansion of city size, city is concentrated
The scope of heating network covering is increasing, and the quantity of heat exchange station is more and more, and area of heat-supply service is increasing.Centralized heating net
Often occurs hydraulic misadjustment phenomenon in the process of running, it is impossible to assignment of traffic is caused into different positions to user according to design requirement
Put the uneven in temperature of user.Hydraulic misadjustment is mainly shown as：Each pipeline flow transmission ＆ distribution are unreasonable, cause the room temperature of each user
Uneven in temperature, close to user's overheat of thermal source near-end, user is forced windowing radiating, makes a large amount of heat energy loss；End away from thermal source
End, does not reach design room temperature.Due to the hydraulic misadjustment of heating network, in order to reach heat supply balance, system generally big flow,
Run under the operating mode of the small temperature difference, overall regulation and control and energy-saving run can not be carried out.
The method that the regulation of existing centralized heating net is once netted has heat exchange station independent control, heat exchange station flow to fix and most
Unfavorable side pressure difference control, front method can partly solve the problems, such as the hydraulic misadjustment of heat supply network, but following technical problem be present：(1)
When acute variation occurs in outdoor temperature, heat supply can be balanced and interfered；(2) hydraulic misadjustment solution is never thorough；(3) need
The sensor wanted has compared with high measurement accuracy, and the requirement to heat supply network hardware facility is higher.Therefore it provides one kind can resist outdoor
Temperature interference, realize heat supply network balance regulation system simple, that precision is high, hardware requirement is low.
The content of the invention
The technical problems to be solved by the invention be hydraulic misadjustment solution present in prior art never thoroughly, outdoor temperature
Change the technical problem of interference.A kind of new heat supply network balance regulation system is provided, the heat supply network balance regulation system has and can resisted
Outdoor temperature interference, realize the characteristics of simple, precision is high, hardware requirement is low.
In order to solve the above technical problems, the technical scheme used is as follows：
A kind of heat supply network balance regulation system, the heat supply network balance regulation system are used for central heating system, central heating system
System includes at least one heat exchange station and is separately positioned on the once net and secondary network of heat exchange station both sides；The heat supply network balance is adjusted
Control system includes field apparatus, the first host computer, and it is total to pass sequentially through communication network, data with field apparatus and the first host computer
The whole network balance module of line connection, the whole network balance module are arranged on the server in the second host computer；The field apparatus
Including being arranged at the first sensor once netted, motor-driven valve and distributed variable frequency pump, and it is arranged at the second sensing of secondary network
Device, water circulating pump and water charging system, and for controlling electrically operated valve, distributed variable frequency pump and the field control of water charging system
Device；First sensor includes outdoor temperature sensor with second sensor.First host computer is teams and groups' host computer, is arranged on
Nearly live end.
The operation principle of the present invention：The present invention combines the operation characteristic of domestic Integrated mining technology, using the uniformity of heat supply network
Control method, can solve the problems, such as the horizontal hydraulic imbalance of heat supply network generally existing well, solve many heat supply network long-term existence
It is uneven in temperature the problem of, greatly increase heating quality, and by outdoor temperature ELIMINATION OF ITS INTERFERENCE.The uniformity controlling of heat supply network
Refer to the once net electrically operated valve or distributed variable frequency pump by adjusting heat exchange station, be all mutually with each heat exchange station heating effect
The regulator control system of control targe.The present invention can be adjusted using existing heat supply network balance regulation parameter as target to complete heat supply network balance
Control.
When heat supply network is run at steady state, the heating load of thermal source is equal to the thermal discharge of heat dissipation equipment, is also equal to simultaneously
The thermic load of heating user.Can be obtained by the equation of heat balance under limit, radiator to indoor heat transfer be equal to it is indoor to
Outdoor heat transfer.The secondary network supply and return water riser of heat exchange station is adjusted to equally, then it is considered that the indoor temperature of building
It is the same.
Once net regulating valve or pump of the invention by adjusting heat exchange station, by the secondary network of each heat exchange station for the average temperature of backwater
Degree is adjusted to unanimously, is ensured even distribution heating between each heat exchange station, is avoided the occurrence of user's situation uneven in temperature.Due to each heat exchange station
Area of heat-supply service will not often change, when outdoor temperature changes, the ratio between thermic load of each heat exchange station is basically unchanged.Thermal source can
To take regulation measure according to the change of outer temperature, the heating effect of each heat exchange station is improved or reduced comprehensively, user will not be changed and adopted
Warm uniformity.
In such scheme, for optimization, further, the water charging system includes small pump, the moisturizing being connected with small pump
Case, the water compensating valve being connected with water supply tank and the make-up water controller for controlling water compensating valve；Level sensing is provided with the water supply tank
Device, make-up water controller control water compensating valve according to liquid level sensor output parameter.
Further, the server is SCADA servers, SCADA servers include primary SCADA servers with it is standby
With SCADA servers.
Further, the temperature sensor is platinum resistance temperature sensor.
Further, the liquid level sensor includes combining with the pressure sensor of water supply tank side, the pressure sensing
Device combines the pressure sensor for including spaced set.The pressure sensor of spaced set is with its adjacent 2 pressure sensor
The distance between be measurement accuracy.When the water surface in water supply tank floods the pressure sensor for being arranged at water supply tank side, liquid level
The pressure value of following pressure sensor becomes big, judges corresponding liquid level.
Heat supply network balance regulation system can realize monitoring running state function, the whole network balance adjustment function, data analysis and pre-
Brake and warning function：The whole network balance module gathers the once net of each heat exchange station for backwater parameter, two by data/address bus
Secondary net is for parameters such as backwater parameter, converter parameter, motor regulated valves, there is provided the display of real time data.
The whole network balance adjustment function：The whole network balance module is according to the real-time parameter collected and the configuration parameter of user, warp
Valve opening or pump frequency are obtained after crossing calculating, the water supply flow once netted of each heat exchange station is adjusted, heat balance is distributed
To the heat-exchange system of each thermal substation, the uniformity regulation of whole heat supply network is realized.
Data analysis and forecast function：The whole network balance module calculates the mean square deviation of heat supply network according to the parameter information of acquisition
With the evaluation index such as imbalance degree, the secondary network supply and return water riser of each heat exchange station is ranked up；The whole network balance module carries
Inquiry for historical data, compare and analyze, draw trend curve；The thermic load of heat supply network is predicted, is Thermal Corp's day-to-day operation
Reference data is provided.
Warning function：Monitoring system has warning function, when thermal substation operational factor appearance exception, as temperature is too high, pressure
Power is excessively low, system generation alarm, prompts operator's timely processing, ensures heat supply production safety Effec-tive Function.The report
Alert module includes audible alarm module.The alarm module includes photoelectric alarm module.Alarm module circuitry is mainly by Shi Ji electricity
Road 555 is formed.Time base circuit 555 connects into sound-light double warning circuit, when there is signal input in circuit, and waveform conversion electricity
When road exports high level, sound-light double warning circuit starts work, sends loud and clear audible warning and light emitting diode dodges
Bright alarm.
Beneficial effects of the present invention：
Effect one, in the case of thermal source operation and external environment condition identical, the heat supply that is covered than existing control method
Area increase, has reached the purpose of energy-conservation, and good economic benefit and social benefit are brought for owner.
Effect two, because the area of heat-supply service of each heat exchange station will not often change, when outdoor temperature changes, each heat exchange station
The ratio between thermic load is basically unchanged, and thermal source can take regulation measure according to the change of outer temperature, improve or reduce each heat exchange station comprehensively
Heating effect, the uniformity of heating will not be changed, improve the interference of anti-outer temperature；
Effect three, by setting standby SCADA servers, stability of a system height.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1, heat supply network balance regulation system schematic.
Fig. 2, alarm module schematic diagram.
Fig. 3, heat supply network balance regulation structural representation in embodiment 1.
Fig. 4, temperature sensor drive circuit.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that specific embodiment described herein is not used to only to explain the present invention
Limit the present invention.
Embodiment 1
The present embodiment provides a kind of heat supply network balance regulation system, such as Fig. 1, and the heat supply network balance regulation system, which is used to concentrate, to be supplied
Hot systems, central heating system include at least one heat exchange station and are separately positioned on the once net of heat exchange station both sides and secondary
Net；The heat supply network balance regulation system includes field apparatus, the first host computer, leads to successively with field apparatus and the first host computer
Communication network, the whole network balance module of data/address bus connection are crossed, the whole network balance module is arranged on the clothes in the second host computer
Business device；Field apparatus includes being arranged at the first sensor once netted, motor-driven valve and distributed variable frequency pump as described in Figure 3, and
Second sensor, water circulating pump and the water charging system of secondary network are arranged at, and for controlling electrically operated valve, distributed frequency conversion
The field controller of pump and water charging system；First sensor includes outdoor temperature sensor with second sensor.
The workflow of the present embodiment：Start heat supply network balance regulation system, field apparatus uploads network parameters and secondary
Network parameters, network parameters include once net water temperature, once net hydraulic pressure, and secondary network parameters include secondary network supply water temperature, secondary
Net return water temperature, secondary network area of heat-supply service；The whole network balance module calculates once net control parameter and secondary network control parameter；It is logical
Cross under data/address bus, communication network and be transmitted to field apparatus, be respectively completed to being arranged at the field apparatus once netted and being arranged at two
The control of secondary net field apparatus.Wherein, it is the temperature parameter in existing regulation and control method to the field apparatus control once netted
Or pressure parameter is as goal of regulation and control.
Preferably, the temperature sensor is platinum resistance temperature sensor.Platinum resistance temperature sensor precision is high, stability
By force.
In detail, the liquid level sensor includes combining with the pressure sensor of water supply tank side, the pressure sensor
Combination includes the pressure sensor of spaced set.The pressure sensor of spaced set with its adjacent 2 pressure sensor it
Between distance be measurement accuracy.When the water surface in water supply tank floods the pressure sensor for being arranged at water supply tank side, liquid level with
Under the pressure value of pressure sensor become big, determine liquid level.
As shown in figure 4, the outdoor temperature sensor drive circuit mainly includes temperature sensor and comparator, resistance R2
Comparator LM393 reference voltage is set with the bleeder circuit of R3 compositions, and the bleeder circuit of resistance R1 and Rg composition is luminous intensity
The output signal of detection, inductance L1 being provided between R1 and temperature sensor Rg, the signal enters comparator LM393 inputs, when
When extraneous light is stronger, LM393 output low levels；When extraneous light is weaker, LM393 output high level.
In detail, the water charging system includes small pump, the water supply tank being connected with small pump, the moisturizing being connected with water supply tank
Valve and the make-up water controller for controlling water compensating valve；Liquid level sensor is provided with the water supply tank, make-up water controller passes according to liquid level
Sensor output parameter controls water compensating valve.When water level is less than level setpoint in water supply tank, then make-up water controller controls water compensating valve
Open, water is injected into water supply tank.
In order to improve the stability of system, it is preferable that the server is SCADA servers, and SCADA servers include
Primary SCADA servers and standby SCADA servers.Primary SCADA servers are used cooperatively with standby SCADA servers, standby
Enabled with SCADA servers in master server failure or inadequate resource, remaining time is in silent status.
Heat supply network balance regulation system can realize monitoring running state function, the whole network balance adjustment function, number in the present embodiment
According to analysis and forecast function and warning function.Heat supply network balance regulation system can realize that monitoring running state function, the whole network balance are adjusted
Save function, data analysis and forecast function and warning function：The whole network balance module gathers each heat exchange station by data/address bus
Once net supplies the parameters such as backwater parameter, converter parameter, motor regulated valve for backwater parameter, secondary network, there is provided real time data
Display.
The whole network balance adjustment function：The whole network balance module is according to the real-time parameter collected and the configuration parameter of user, warp
Valve opening or pump frequency are obtained after crossing calculating, the water supply flow once netted of each heat exchange station is adjusted, heat balance is distributed
To the heat-exchange system of each thermal substation, the uniformity regulation of whole heat supply network is realized.
Data analysis and forecast function：The whole network balance module calculates the mean square deviation of heat supply network according to the parameter information of acquisition
With the evaluation index such as imbalance degree, the secondary network supply and return water riser of each heat exchange station is ranked up；The whole network balance module carries
Inquiry for historical data, compare and analyze, draw trend curve；The thermic load of heat supply network is predicted, is Thermal Corp's day-to-day operation
Reference data is provided.
Warning function：Monitoring system has warning function, when thermal substation operational factor appearance exception, as temperature is too high, pressure
Power is excessively low, system generation alarm, prompts operator's timely processing, ensures heat supply production safety Effec-tive Function.Such as Fig. 2,
Alarm module circuitry is mainly made up of time base circuit 555.Time base circuit 555 connects into sound-light double warning circuit, when in circuit
There is signal input, and during waveform translation circuit output high level, sound-light double warning circuit starts work, sends loud and clear sound
Ring alarm signal and light emitting diode D3 flicker alarms.The operating voltage of time base circuit 555 is+5V, and the present embodiment supply voltage is adopted
Simple mu balanced circuit is constituted with+12V, resistance R6 and voltage-regulator diode VDZ2, supply voltage is reduced to stable low electricity
Pressure, about 5V supply time base circuits 555 use.
It is the tables of data that thermal source detects in status monitoring function such as table 1：
| Sequence number | Title | Symbol | Explanation |
| 1. | Supply water temperature | tsg | |
| 2. | Return water temperature | tsh | |
| 3. | Pressure of supply water | psg | MPa |
| 4. | Pressure of return water | psh | Ton hour |
| 5. | Water supply instantaneous delivery | fsg | Ton hour |
| 6. | Backwater instantaneous delivery | fsh | Ton hour |
Table 1
It is heat exchange station Monitoring Data table in status monitoring function such as table 2：
| Sequence number | Title | Symbol | Explanation |
| 1. | Once net supply water temperature | t1g | |
| 2. | Once net return water temperature | t1h | |
| 3. | Secondary network supply water temperature | t2g | |
| 4. | Secondary network return water temperature | t2h | |
| 5. | Once net valve or pump set-point | v1, set | Valve opening or pump frequency |
| 6. | Once net valve or pump value of feedback | v1, value | Valve opening or pump frequency |
| 7. | Heat exchange station secondary network supply and return water riser desired value | t2, set | |
| 8. | Heat exchange station secondary network supply and return water riser actual value | t2, value | |
| 9. | Temperature weighted | δti | |
| 10. | Whether the whole network balance is participated in | Yes/no |
Table 2
The target temperature of heat exchange station is based on the whole network supply and return water riser, according to user heating type and heat exchange station
Temperature weighted is modified.Because heating system is Large-lag System, it is suitable for sampling adjustment, electric control valve is entered in the ranks
The regulation having a rest, once, specific interval time sets according to the scale of heat supply network for general 1,2 hour regulation.Heat supply network scale is got over
Greatly, control interval also should be longer, so as to fully demonstrate the influence of calorie spread delay.
In detail, the control for completing the field apparatus to being arranged at secondary network is to control the supply backwater temperature difference of secondary network
Or recirculated water total flow.Control the supply backwater temperature difference of secondary network：In this control mode, according to the actual water supply of secondary network, return
Coolant-temperature gage determines the supply backwater temperature difference setting value of secondary network, and the control to water circulating pump is realized using this setting value as desired value.Behaviour
Work person can be with this controlling curve of each heat exchange station of online modification.
Embodiment 2
The present embodiment further improves performance of control on the basis of embodiment 1, using distinctive method.
In detail, it is described to complete to be according to the target temperature side of calculating automatically to the control for being arranged at the field apparatus once netted
Method and the independent temprature control method control electric control valve of each thermal substation and distributed variable frequency pump.
Target temperature automatic calculating method：Being put down for backwater for heat exchange station secondary network is calculated by heat supply network the whole network balancing software automatically
Equal temperature, the control to electric control valve or distributed variable frequency pump is realized, recommend to use such a control method.
Indoor calculating temperature, outdoor calculating temperature, design supply water temperature, design temperature of return water known to assuming in this implementation,
The relation of supply water temperature, return water temperature and mean temperature and outer temperature is as follows：
In formula,
Δt′s=0.5 × (t 'g+t′h-tn) represent radiator design MTD, DEG C；
Δt′j=t 'g-t′hRepresent that the design supply and return water temperature of radiator is poor, DEG C；
With respect to the ratio between space heating load, the ratio between space heating load and design heating load are defined as；
B values in b radiator heat transfer coefficient formulas, have heat sink format relevant；
Because outdoor temperature is to space heating load plays, it can thus be assumed that space heating load and room, inside and outside
The temperature difference is directly proportional, i.e.,It is approximated by：
The indoor calculating temperature of normal residential heating takes 18 DEG C, outdoor calculating temperature t 'w, the outdoor calculating temperature of Beijing
For -9 DEG C.T is taken when being calculated such as supply and return water riser and the relation of outdoor temperature that Fig. 4 is 6 kinds of heating typesn=18, b=
0.3。
Heating type identical situation：The then equal indoor temperature for representing building of the supply and return water riser of each heat exchange station
Also it is equal.When the supply and return water riser for monitoring heat exchange station is unequal, it is necessary to by adjusting the valve or pump once netted,
The supply and return water riser of all heat exchange stations is adjusted to unanimously.In the valve or pump that adjustment is once netted, in order to reduce heat supply network trunk
Waterpower concussion, it is desirable to the front and rear thermal change sum of all heat exchange stations adjustment is 0.
Therefore, in heating type under the same conditions, the supply and return water riser of heat supply network presses area equal to all heat exchange stations
The supply and return water riser of weighting.
The different types of situation of heating：The type on the basis of heating heating.Under identical outdoor temperature, when heating type
Supply and return water riser and the temperature difference of reference type when meeting heating type thermometer, the indoor temperature of building also should
The holding is identical.Assuming that the heat transfer coefficient of heat exchange station is Ki, area Si, supply and return water riser ti, i=1,2..n..When
The supply and return water riser of heat exchange station is quickly from Current Temperatures tiChange turns to target temperatureWhen, the variable quantity of heat is：
Assuming that outside identical under temperature, the supply and return water riser of the heating type and the temperature difference of reference type are δi,
In order that indoor temperature keeps equal, then it should meet conditionOn the basis of type heat exchange station target temperature
Value.
Equally, the thermal change sum of all heat exchange stations is 0, i.e. ∑iΔQi=0, then：
Solve the target temperature of reference type heat exchange station.
Temperature computation process：
Target temperature is calculated according to supply and return water temperature：The target of the whole network is calculated according to the secondary confession of heat exchange station, return water temperature
TemperatureOnly count the heat exchange station of actual confession, return water temperature in the range of 15 to 90 degree.
Target temperature is calculated according to outer temperature：Due to the effect of building thermal inertia, being raised and lowered for outer temperature moment will not
The respective change of room temperature is caused immediately, the process that delay between the thermic load of building and outer temperature be present.If each heat exchange station
Control does not consider the effect for decaying and postponing, and externally temperature carries out moving average processing, but is carried out according to change warm outside moment
Regulation, it will the waterpower concussion of aggravation heat supply network trunk.The confession that the whole network is calculated according to outdoor temperature and outdoor temperature controlling curve is returned
Water mean temperature.Outdoor temperature controlling curve is defined by one group of sampled point, sampled point define outdoor temperature with it is corresponding
Secondary network supply water temperature, secondary network return water temperature, continuous temperature control curve can obtain by linear interpolation arithmetic, it is assumed that
Confession, return water temperature curve after interpolation are respectively g (t) and h (t).
The target temperature of heat exchange station is based on the whole network supply and return water riser, according to user heating type and heat exchange station
Temperature weighted is modified.Because heating system is Large-lag System, it is suitable for sampling adjustment, electric control valve is entered in the ranks
The regulation having a rest, once, specific interval time sets according to the scale of heat supply network for general 1,2 hour regulation.Heat supply network scale is got over
Greatly, control interval also should be longer, so as to fully demonstrate the influence of calorie spread delay.
The supply and return water riser of heat exchange station deviates the degree of target temperature, can embody heat supply between each thermal substation
Whether effect is identical.When valve or pump are adjusted, the aperture of valve or the frequency change of pump are unsuitable excessive, and amplitude of accommodation δ t should
Determined by current valve opening L and temperature deviation δ t：
δ L=aLbδt
In formula, the coefficient of a and b between [0,1], determined by valve or pump.
Adjusting device according to once netting is that electric control valve or distributed variable frequency pump need to distinguish and set.Before calculating
Carrying bar is：Heat supply network target temperature is between (10,80), and heat exchange station state is true and communications status is true.
Electric control valve：Assuming that the target temperature t of heat exchange stationset, actual temperature tcurrent。
Maximal regulated amplitude δ L=3+12 × L/100 are calculated, L is the value of feedback of valve；
Calculation error δ x=(tcurrent-tset) × Kp, KPFor the K of valvePValue；
If δ x≤- δ L, δ x≤- δ L；
If δ x >=δ L, δ x=δ L；
Calculate valve set-point X
X=Xold-δx
In formula, XoldFor the set-point of valve last moment；
If X crosses the border, border point value is taken：
If X ＜ Xmin, then X=Xmin, XminFor the minimum setting value of valve；
If X ＞ 100, X=100；
Distributed variable frequency pump：Assuming that the target temperature t of heat exchange stationset, actual temperature tcurrent。
Calculation error δ x=(tcurrent-tset)×Kp, KPFor the K of pumpPValue；
If δ x≤- 3, δ x=-3；
If δ x >=3, δ x=3；
Calculate the set-point X of pump
X=Xold-δx
In formula, XoldFor the set-point of valve last moment；
If X crosses the border, border point value is taken：
If X ＜ Xmin, then X=Xmin, Xmin is the minimum setting value of pump door；
If X>50, then X=50；
Embodiment 2
It is individually warm that the present embodiment replaces with each thermal substation on the basis of embodiment 1, by target temperature automatic calculating method
Spend control method.
Specially：According to the outdoor temperature that the actual measured value of outdoor temperature and owner submit and backwater/supply water temperature
Realize the control to electric control valve or distributed variable frequency pump in setting value storehouse.For the heating system being indirectly connected with, controlled variable
For the supply and return water riser of secondary network, adjustment parameter is valve position or the distributed variable frequency pump for the electric control valve once netted
Frequency.When heating system is under external interference, is controlled the actual value and inconsistent set-point of parameter, by adjustment parameter
Regulation, eliminate the deviation of controlled variable.
In detail, the control for completing the field apparatus to being arranged at secondary network is to control the supply backwater temperature difference of secondary network
Or recirculated water total flow.
Control the supply backwater temperature difference of secondary network：In this control mode, determined according to the actual water supply of secondary network, return water temperature
Determine the supply backwater temperature difference setting value of secondary network, the control to water circulating pump is realized using this setting value as desired value.Operator can be with
This controlling curve of each heat exchange station of online modification.
Embodiment 3
The present embodiment replaces with control secondary network on the basis of embodiment 2, by the supply backwater temperature difference for controlling secondary network
Recirculated water total flow：According to the concrete condition of heat supply network or thermal substation, every square metre of circulating water flow required per hour is set
Amount, according to the load of heat exchange station institute band, load is the secondary network recirculated water total flow set value that area of heat-supply service determines our station, with
This setting value is control of the control targe realization to secondary network water circulating pump.
The thermic load time series of thermal source or heat exchange station has a non-linear and chaotic characteristic, but the Hurst indexes of sequence
Between 0.5 and 1.0, therefore sequence has long duration, the generally trend of previous time series up/down, indication
The trend of next time series up/down, the short-term forecast of thermic load are established on this basis.
Heat supply network the whole network balancing software obtains related data by OPC modes from configuration software, and these data include：It is outdoor
Temperature, the water supply flow of thermal source, supply water temperature, return water temperature etc., software pass through the heat that BP neural network algorithm predicts heat supply network
Load.
Input variable refers to the various factors for influenceing thermic load.When selecting input variable, it is necessary to weigh significance level, obtain
Complexity, computation complexity etc..The various factors changed by analyzing influence thermic load, the input of candidate become
Amount is divided into following a few classes：In terms of heating system, including water supply flow, supply water temperature, return water temperature, thermic load etc.；Outside
In terms of portion condition, including outdoor temperature, outdoor wind speed, weather condition, shine upon rate, atmospheric pressure etc.；In timeliness side
Face, including working day, round the clock etc..
The data such as working day, water supply flow, supply water temperature, return water temperature can be obtained by the configuration software of heat supply network, room
Outer temperature, outdoor wind speed, weather condition, shine upon the weather conditions such as rate, atmospheric pressure can from locality weather station obtain
.
The present embodiment selects following input variable：The average outdoor temperature of continuous 7 days, the heat of continuous 7 days recently are born recently
Lotus, illumination, wind-force, building energy conservation.
Input variable is pre-processed in advance：The codomain of the transmission function of neutral net output layer is conditional, is needed
The target data of network training is mapped to the codomain of activation primitive.For example, according to S-shaped transmission function, due to S-shaped letter
Several codomains is limited in (0,1), and the output of training data will normalize to [0,1] section.
Continuity parameter：
Thermic load, outdoor temperature etc. are the values of consecutive variations, and using following linear normalization function, data normalization is arrived
[0,1] section.
Wherein, min be x minimum value, max be x maximum, input vector x, output vector y.
Illumination parameter：Cloudy day takes 0, and half the moon takes 0.5, and fine day takes 1.0.
Wind-force parameter：Small wind takes 0, and apoplexy takes 0.5, and strong wind takes 1.0.
Building energy conservation parameter：Non- energy-conservation takes 0, and mixing takes 0.5, and energy-conservation takes 1.0.
, it is necessary to train neutral net using sample data before BP neural network can make prediction.The instruction of BP networks
Practice process to be made up of the forward-propagating of input signal and the backpropagation of error.During forward-propagating, input signal passes from input layer
Enter, after hidden layer is successively handled, pass to output layer.If the reality output of output layer is unequal with desired output, turn
To the back-propagation phase of error.Error back propagation is that error distribution is given to output error by hidden layer successively anti-pass
All neurons of each layer, so as to obtain the error signal of each layer neuron, this error signal is i.e. as each neuron power of amendment
The foundation of value.With being repeated for signal forward-propagating and error back propagation, weights are constantly corrected.This was trained
Journey is continued until that the error of network output is reduced to acceptable degree, or reaches most long learning time set in advance,
Or proceed to maximum study number set in advance.
Although the illustrative embodiment of the present invention is described above, in order to the technology of the art
Personnel are it will be appreciated that the present invention, but the present invention is not limited only to the scope of embodiment, to the common skill of the art
For art personnel, as long as long as various change in spirit and scope of the invention, all utilize present inventive concept innovation and creation
In the row of protection.
Claims (8)
- A kind of 1. heat supply network balance regulation system, it is characterised in that：The heat supply network balance regulation system is used for central heating system, collection Middle heating system includes at least one heat exchange station and is separately positioned on the once net and secondary network of heat exchange station both sides；The heat supply network balance regulation system includes field apparatus, the first host computer, leads to successively with field apparatus and the first host computer Communication network, the whole network balance module of data/address bus connection are crossed, the whole network balance module is arranged on the clothes in the second host computer Business device；The field apparatus includes being arranged at the first sensor once netted, motor-driven valve and distributed variable frequency pump, and is arranged at Second sensor, water circulating pump and the water charging system of secondary network, and for controlling electrically operated valve, distributed variable frequency pump and moisturizing The field controller of system；First sensor includes outdoor temperature sensor with second sensor.
- 2. heat supply network balance regulation system according to claim 1, it is characterised in that：The water charging system includes small pump, The water supply tank being connected with small pump, the water compensating valve being connected with water supply tank and the make-up water controller for controlling water compensating valve；Liquid level sensor is provided with the water supply tank, make-up water controller controls water compensating valve according to liquid level sensor output parameter.
- 3. heat supply network balance regulation system according to claim 1, it is characterised in that：The server is SCADA servers, SCADA servers include primary SCADA servers and standby SCADA servers.
- 4. heat supply network balance regulation system according to claim 1, it is characterised in that：The heat supply network balance regulation system is also wrapped Include the alarm module being connected with the whole network balance module.
- 5. heat supply network balance regulation system according to claim 4, it is characterised in that：The alarm module includes audible alarm Module.
- 6. heat supply network balance regulation system according to claim 5, it is characterised in that：The alarm module includes photoelectric alarm Module.
- 7. heat supply network balance regulation system according to claim 1, it is characterised in that：The temperature sensor is RTD temperature Spend sensor.
- 8. heat supply network balance regulation system according to claim 1, it is characterised in that：The liquid level sensor includes and moisturizing The pressure sensor combination of case side, the pressure sensor combination include the pressure sensor of spaced set.
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Application publication date: 20180116 |