CN100406865C - Heating load prediction and control method for heat storage boiler system - Google Patents

Abstract

The present invention discloses a heating load prediction and control method for a heat storage boiler system. The prediction method actually measures a running heat load and applies temperature correction factors; the control method calculates the required quantity of heat in each time interval according to the heating load diagram predicted with the prediction method and controls the system work of the heat storage boiler according to the principle of fully using of valley point electricity, rarely using of ordinary electricity and no using of peak electricity. The present invention has the technical scheme of actually measuring a running heat load and applying temperature correction factors so as to greatly improve the predicting accuracy of the heat load. The running strategy of the electric heat storage boiler is confirmed with an intelligent control theory according to the exactly and determinately predicted heat load so as to not only ensure comfortable heating but also farthest reduce operating cost.

Description

The heating load prediction and the control method of heat storage boiler system

Technical field

The present invention relates to the heat storage boiler system heating load prediction and control method, relate in particular to heating load prediction and the operation heat supply method of heat storage boiler in the timesharing electrical network that water comes accumulation of heat.

Background technology

Pressure-bearing thermal storage electric boiler water comes accumulation of heat, at its heat-accumulator tank top one vapor chamber is arranged, and its underpart is the accumulation of heat water cavity.Be provided with some groups of electric heating tubes in the accumulation of heat water cavity of regenerative furnace, utilize cheap paddy electricity in night, electric heating tube energising, the heating of accumulation of heat water.Along with the progress of heating process, the pressure of vapor chamber increases gradually, thereby the heat accumulating water temperature degree also rises gradually.The highest water temperature of existing pressure-bearing thermal storage electric boiler is 145 ℃, and corresponding vapor pressure (saturated vapour pressure) is 0.32Mpa.

The pressure-bearing thermal storage electric boiler is in paddy electricity period accumulation of heat at night, and ordinary telegram, peak electricity period heat release are used for the user by day.To electrical network speech, played " peak load shifting " effect like this, balance load, night, the paddy electricity was fully used.To user's speech, then greatly reduce operating cost.Electric boiler adapts to growing environmental requirement again, thereby power department vigorously advocates and recommend to use thermal storage electric boiler, and application prospect is very bright.

The pressure-bearing regenerative furnace has three kinds of operating conditions: accumulation of heat, heat release, put while holding.

Desirable operating condition is: the accumulation of heat of paddy electricity, ordinary telegram and peak tele-release heat are called " full accumulation of heat ".

Full regenerative operation expense is minimum, but the regenerative furnace that requires is bulky.When the gross heat input of customer requirements is big, be subjected to the restriction of boiler room size, often be difficult to realize.

Mostly operating condition is: paddy electricity period accumulation of heat (when needing heat supply) part ordinary telegram period heat release then for putting while holding as the paddy electricity period, and the part ordinary telegram period puts while holding, peak electricity period heat release, this is called the part accumulation of heat.

But the size of requirement heating load is depended in the operation of regenerative furnace, and the regenerative furnace of same platform number and capacity is less as requiring heating load, then can realize " only using the paddy electricity, without ordinary telegram ", promptly realizes " full accumulation of heat "; As require heating load bigger, and can only be " make full use of the paddy electricity, use ordinary telegram less as far as possible, avoid the peak fully ", promptly realize " part accumulation of heat "; As when requiring heating load very big, or even " make full use of paddy electricity and ordinary telegram, also will use the part peak ".

The size of customer requirements heating load is again a variable at heating period, at first it depends on the height of temperature, and temperature is high more, requires heating load more little, vice versa, secondly also relevant with the period, as residential quarter night (23:00-6:00) though temperature is low, because most residents are sleeping, require heating load to decrease, in addition also with to require heating area relevant, as grand theater, it and whether perform be that busy season or dull season are relevant.

The whole heating phase, the heating load of customer requirements is a variable, and this just produces following two problems:

1. to predict the heating load of customer requirements;

2. according to the heating load that requires of prediction, how to realize the optimum economical operation of regenerative furnace? the operation that is regenerative furnace should guarantee that heating load is that prediction requires heating load, guarantees that the user is comfortable, realize " only using paddy; use ordinary telegram less as far as possible, avoid the peak fully " again, promptly realize optimum economical operation.This respect prior art situation is according to the temperature size, and the heating phase is divided into several different sections.The temperature scope that each section is corresponding different, and the regulation regenerative furnace moves strategy (when power on, when have a power failure, when heat release, when stop heat release etc.) accordingly, the user is equiped with outdoor temperature sensor, judges in view of the above current operation day to belong to which section, carries out which operation strategy.

Obviously, this regenerative furnace operation control is comparatively coarse and original, heating load that can not the accurately predicting requirement.The temperature scope that each section is corresponding certain, the promptly corresponding different heating loads that require but all adopt identical operation strategy, move so can not realize optimal economic.

Summary of the invention

An object of the present invention is to provide a kind of can be than the method for accurately predicting heating load.

Another object of the present invention provides a kind of method that can rationally control the operation conditions of heat storage boiler system.

In order to achieve the above object, the present invention adopts following technical scheme:

The heating load Forecasting Methodology of a kind of heat storage boiler system is used for coming with water the thermal storage electric boiler system of accumulation of heat, and this method may further comprise the steps:

A. divide the water vat place to measure supply water temperature T at boiler _S, measure return water temperature T at the boiler cylinder place that catchments _R, unit is degree centigrade, following temperature unit is degree centigrade, measures the flow Q of water in the heating system return main _H, unit is (m ³/ h), following flux unit is (m ³/ h);

B. calculate heating power N _H=(T _S-T _R) * Q _H* 1000 ÷ 860, thermal power unit is KW, following thermal power unit is KW;

C. calculate t constantly ₁To moment t ₂Between heating load, heating load unit is KWh, following thermal unit is KWh, uses formula:

$H=\underset{t1}{\overset{t2}{\∫}}{N}_H\mathrm{dt}$

D. get the moment t that differs 24 hours ₁And t ₂, chronomere is hour, following chronomere is hour, draws with respect to the heating load diagram of time and calculates heating load;

E. calculate second day correction coefficient of heat load K _Repair:

F. calculate second day heating load of prediction:

Prediction heating load=K _Repair* the same day heating load, and the heating load diagram of draw revising.

The heating load control method of a kind of heat storage boiler system is used for coming with water the thermal storage electric boiler system of accumulation of heat, comprises n platform regenerative furnace and m platform direct heating furnace in the described heat storage boiler system, and this method may further comprise the steps:

A '. calculate the design amount of stored heat of the separate unit regenerative furnace of hold over system:

A1 ' but. calculate the paddy accumulation of heat total amount H of electricity period according to installed power _{Hold merit}:

H _{Hold merit}=P _Hold* t _Paddy* η _Hold,

P wherein _HoldBe the regenerative furnace installed power, t _PaddyBe the time span of system's location paddy electricity, η _HoldBe the efficient of regenerative furnace;

A2 '. calculate the accumulation of heat total amount H of regenerative furnace according to the effective storage capacity of regenerative furnace _{Hold appearance}:

H _{Hold appearance}=V _Hold* (T _H-T _L) * 1000 ÷ 860,

V wherein _HoldBe the reservoir capacity of heat storage boiler, T _HBe to design the highest water temperature, T _LIt is the minimum water temperature of design;

A3 '. get H _{Hold merit}And H _{Hold appearance}In a less design amount of stored heat H as the separate unit regenerative furnace _{Hold Meter}

B '. determine the operation strategy of the heat storage boiler system of paddy electricity period:

B1 '. determine the operation strategy of direct heating furnace, calculate paddy user's heat requirement H of electricity period according to the resulting heating load diagram of step f in the claim 1 _PaddyNeed thermal power N with the maximum of paddy electricity period _{H paddy}, the formula of use is with the formula among the step c;

B2 '. the power of described m platform direct heating furnace is P _Directly, t _PaddyBe the time span of system's location paddy electricity, η _DirectlyBe the efficient of direct heating furnace; Then calculate a numerical value m ₁, make (m ₁-1) * P _Directly* η _Directly＜N _{H Paddy}＜m ₁* P _Directly* η _Directly

B3 ' if. m ₁≤ m then starts m ₁The heat release of platform direct heating furnace; If m＜m ₁, then start the heat release of whole m platform direct heating furnace;

B4 '. determine the operation strategy of regenerative furnace, calculate user's heat requirement H of ordinary telegram period according to the heating load diagram of the resulting correction of step f in the claim 1 _FlatWith peak user's heat requirement H of electricity period _{The peak}, the formula of use is with the formula among the step c;

B5 '. the design amount of stored heat H of described n platform regenerative furnace _{Hold meter}In step a3 ', calculate, if m ₁≤ m illustrates H _PaddyAll provide, then calculate a numerical value n by direct heating furnace ₁, make (n ₁-1) * H _{Hold meter}＜H _Flat+ H _{The peak}＜n ₁* H _{Hold meter}If n ₁≤ n then starts n ₁The accumulation of heat of platform regenerative furnace; If n＜n ₁, then start the accumulation of heat of whole n platform regenerative furnace; If m＜m ₁, then calculate a numerical value n ₁, make (n ₁-1) * H _{Hold meter}＜H _Paddy-m * P _Directly* t _Paddy* η _Directly+ H _Flat+ H _{The peak}＜n ₁* H _{Hold meter}If n ₁≤ n then starts n ₁Platform accumulation of heat sole is put the limit and is held; If n＜n ₁, then start whole n platform accumulation of heats sole and put the limit and hold;

C '. determine the operation strategy of the heat storage boiler system of ordinary telegram period:

C1 '. as n ₁≤ n, then institute's heat requirement is all by n the ordinary telegram period ₁The heat release of platform regenerative furnace provides, as n＜n ₁, the amount of stored heat H of regenerative furnace when then calculating the end of paddy electricity _{Hold paddy}

C2 ' if. m ₁≤ m, then H _{Hold paddy}=n * H _{Hold meter}If, m＜m ₁, H then _{Hold paddy}=n * H _{Hold meter}-(H _Paddy-m * P _Directly* t _Paddy* η _Directly); Calculate a numerical value n again ₂, make (n ₂-1) * H _{Hold meter}＜H _Flat+ H _{The peak}＜n ₂* H _{Hold meter}

C3 ' if. n ₂* H _{Hold meter}≤ H _{Hold paddy}, then start n ₂The heat release of platform regenerative furnace; If H _{Hold paddy}＜n ₂* H _{Hold meter}, then start the heat release of n platform regenerative furnace, and enter step c4 ';

C4 '. calculate ordinary telegram period n available total amount of heat H of regenerative furnace _{Residual flat}=H _{Hold paddy}-H _{The peak}

C5 '. the heat supply and demand of calculating the ordinary telegram period is poor: H _Adjustment=H _Flat-H _{Residual flat}

C6 ' .t _FlatBe the time span of system's location ordinary telegram, then calculate a numerical value m ₂, make (m ₂-1) * P _Directly* t _Flat* η _Directly＜H _Adjustment＜m ₂* P _Directly* t _Flat* η _Directly

C7 ' if. m ₂≤ m then starts m ₂The heat release of platform direct heating furnace; If m＜m ₂, then start the heat release of whole m platform direct heating furnace;

C8 '. calculate the operation strategy of ordinary telegram period heat storage boiler: if the m that calculates among the step c7 ' ₂≤ m then starts n platform regenerative furnace and m ₂The platform direct heating furnace carries out heat release; If the m＜m that calculates among the step c7 ' ₂, then regenerative furnace also will carry out accumulation of heat in the ordinary telegram period; Calculate H _{Hold flat}=H _Adjustment-m * P _Directly* t _Flat* η _DirectlyCalculate again: t _{Hold flat}=H _{Hold flat}/ (n * P _Hold* η _Hold); If t _{Hold flat}≤ t _Flat, at t _{Hold Flat}In period, start the accumulation of heat of n platform heat storage boiler; If t _Flat≤ t _{Hold flat}, then at all t _FlatIn period, start the accumulation of heat of n platform heat storage boiler;

D '. determine the operation strategy of the heat storage boiler system of peak electricity period:

D1 ' if. the n that calculates among the described step b5 ' ₁≤ n illustrates that then the amount of stored heat in the heat storage boiler can satisfy the peak electricity heat demand amount in period, then at peak electricity n in period ₁The platform heat storage boiler all starts heat release, if n＜n ₁If, the n that calculates among the then described step c3 ' ₂≤ n is at peak electricity n in period ₂The platform heat storage boiler starts heat release;

D2 ' if. the n＜n that calculates among the described step c3 ' ₂, then judge the t among the described step c8 ' _{Hold flat}If, t _{Hold flat}≤ t _Flat, illustrating that then the amount of stored heat in the heat storage boiler can satisfy the peak electricity heat demand amount in period, electricity n platform heat storage boiler in period all starts heat release at the peak; If t _Flat≤ t _{Hold flat}, then the amount of stored heat of peak electricity heat storage boiler in period is not enough, under the situation of starting the heat release of n platform heat storage boiler, enters steps d 3 ';

D3 '. the heat supply and demand of calculating peak electricity period is poor: H _{The peak is poor}=(t _{Hold flat}-t _Flat) * n * P _Hold* η _Hold

D4 '. determine the peak electricity direct heating furnace operation strategy in period: t _{The peak}Be the time span of peak, system location electricity, then calculate a numerical value m ₃, make (m ₃-1) * P _Directly* t _{The peak}* η _Directly＜H _{The peak is poor}＜m ₃* P _Directly* t _{The peak}* η _Directly

D5 ' if. m ₃≤ m then starts m ₃The heat release of platform direct heating furnace; If m＜m ₃, then start the heat release of whole m platform direct heating furnace;

D6 '. determine the peak electricity regenerative furnace operation strategy in period: if the m that calculates in the steps d 5 ' ₃≤ m then starts n platform regenerative furnace and m ₃The platform direct heating furnace carries out heat release; If the m＜m that calculates in the steps d 5 ' ₃, then regenerative furnace also will carry out accumulation of heat period at the peak electricity; Calculate H _{Hold the peak}=H _{The peak is poor}-m * P _Directly* t _{The peak}* η _DirectlyCalculate again: t _{Hold the peak}=H _{Hold the peak}/ (n * P _Hold* η _Hold); If t _{Hold the peak}≤ t _{The peak}, at t _{Hold the peak}In period, start the accumulation of heat of n platform heat storage boiler; If t _{The peak}≤ t _{Hold the peak}, then at all t _{The peak}In period, start the accumulation of heat of n platform heat storage boiler.

Technical scheme of the present invention adopts actual measurement operation thermal load, and in addition temperature modifying factor method can improve the degree of accuracy of prediction thermal load greatly.According to accurately determining the prediction thermal load, adopt Intelligent Control Theory to determine the operation strategy of Electric heat-storing oven, can guarantee that heat supply is comfortable, can reduce operating cost to greatest extent again.

Description of drawings

Fig. 1 is the process flow diagram of an embodiment of the heating load Forecasting Methodology of heat storage boiler of the present invention system;

Fig. 2 is the process flow diagram of an embodiment of the heating load control method of heat storage boiler of the present invention system;

Fig. 3 is the process flow diagram of another embodiment of the heating load control method of heat storage boiler of the present invention system;

Fig. 4 is a heating load diagram of using an example of Forecasting Methodology of the present invention;

Fig. 5 is the control figure as a result that uses an example of control method of the present invention.

Embodiment

Further specify the technical solution of the utility model below in conjunction with drawings and Examples.

Fig. 1 is the process flow diagram of an embodiment of the heating load Forecasting Methodology of heat storage boiler of the present invention system.This embodiment may further comprise the steps:

A. divide the water vat place to measure supply water temperature T at boiler _S, measure return water temperature T at the boiler cylinder place that catchments _R, unit is degree centigrade, following temperature unit is degree centigrade, measures the flow Q of water in the heating system return main _H, unit is (m ³/ h), following flux unit is (m ³/ h);

B. calculate heating power N _H=(T _S-T _R) * Q _H* 1000 ÷ 860, thermal power unit is KW, following thermal power unit is KW;

C. calculate t constantly ₁To moment t ₂Between heating load, heating load unit is KWh, following thermal unit is KWh, uses formula:

$H=\underset{t1}{\overset{t2}{\∫}}{N}_H\mathrm{dt}$

D. get the moment t that differs 24 hours ₁And t ₂, chronomere is hour, following chronomere is hour, draws with respect to the heating load diagram of time and calculates heating load;

E. calculate second day correction coefficient of heat load K _Repair:

K _Repair=K _{Repair 1}* K _{Repair 2}

K _{Repair 1}Be temperature correction factor, K _{Repair 2}Be the heating area correction factor;

Owing to be measured value, thus obtain require heating load quite accurate.Because all different when daily temperature and the area of heat-supply service on the area of heat-supply service of next day and same day when time daily temperature and actual measurement revised so tackle measured value when requiring heating load next day according to the measured value prediction.

F. calculate second day heating load of prediction:

Prediction heating load=K _Repair* the same day heating load, and the heating load diagram of draw revising.

Fig. 4 is a heating load diagram of using an example of Forecasting Methodology of the present invention, the longitudinal axis is a thermal load, and transverse axis is the time, and the electrical network timesharing situation of this area is paddy: 23:00-7:00, ordinary telegram: 11:00-17:00 and 21:00-23:00, peak: 7:00-11:00 and 17:00-21:00.

Fig. 2 is the process flow diagram of an embodiment of the heating load control method of heat storage boiler of the present invention system.

Comprise n platform regenerative furnace and m platform direct heating furnace in the described heat storage boiler system, this method may further comprise the steps:

A '. calculate the design amount of stored heat of the separate unit regenerative furnace of hold over system:

A1 ' but. calculate the paddy accumulation of heat total amount H of electricity period according to installed power _{Hold merit}:

H _{Hold merit}=P _Hold* t _Paddy* η _Hold,

P wherein _HoldBe the regenerative furnace installed power, t _PaddyBe the time span of system's location paddy electricity, η _HoldBe the efficient of regenerative furnace;

A2 '. calculate the accumulation of heat total amount H of regenerative furnace according to the effective storage capacity of regenerative furnace _{Hold appearance}:

H _{Hold appearance}=V _Hold* (T _H-T _L) * 1000 ÷ 860,

V wherein _HoldBe the reservoir capacity of heat storage boiler, T _HBe to design the highest water temperature, T _LIt is the minimum water temperature of design;

A3 '. get H _{Hold merit}And H _{Hold appearance}In a less design amount of stored heat H as the separate unit regenerative furnace _{Hold Meter}

B '. determine the operation strategy of the heat storage boiler system of paddy electricity period: in the paddy electricity period, the principle of operation is to make heat storage boiler carry out accumulation of heat and not heat release as far as possible, heat supply in the paddy electricity period is mainly finished by direct heating furnace, when if the design power of direct heating furnace is not enough, consider again to make regenerative furnace carry out heat release simultaneously.

B1 '. determine the operation strategy of direct heating furnace, calculate paddy user's heat requirement H of electricity period according to the resulting heating load diagram of steps d in the claim 1 _PaddyNeed thermal power N with the maximum of paddy electricity period _{H paddy}, the formula of use is with the formula among the step c;

B2 '. the power of described m platform direct heating furnace is P _Directly, t _PaddyBe the time span of system's location paddy electricity, η _DirectlyBe the efficient of direct heating furnace; Then calculate a numerical value m ₁, make (m ₁-1) * P _Directly* η _Directly＜N _{H Paddy}＜m ₁* P _Directly* η _Directly

B3 ' if. m ₁≤ m then starts m ₁The heat release of platform direct heating furnace; If m＜m ₁, then start the heat release of whole m platform direct heating furnace;

B4 '. determine the operation strategy of regenerative furnace, calculate user's heat requirement H of ordinary telegram period according to the heating load diagram of the resulting correction of step f in the claim 1 _FlatWith peak user's heat requirement H of electricity period _{The peak}, the formula of use is with the formula among the step c;

B5 '. the design amount of stored heat H of described n platform regenerative furnace _{Hold meter}In step a3 ', calculate, if m ₁≤ m illustrates H _PaddyAll provide, then calculate a numerical value n by direct heating furnace ₁, make (n ₁-1) * H _{Hold meter}＜H _Flat+ H _{The peak}＜n ₁* H _{Hold meter}If n ₁≤ n then starts n ₁The accumulation of heat of platform regenerative furnace; If n＜n ₁, then start the accumulation of heat of whole n platform regenerative furnace; If m＜m ₁, then calculate a numerical value n ₁, make (n ₁-1) * H _{Hold meter}＜H _Paddy-m * P _Directly* t _Paddy* η _Directly+ H _Flat+ H _{The peak}＜n ₁* H _{Hold meter}If n ₁≤ n then starts n ₁Platform accumulation of heat sole is put the limit and is held; If n＜n ₁, then start whole n platform accumulation of heats sole and put the limit and hold;

C '. determine the operation strategy of the heat storage boiler system of ordinary telegram period: the principle of ordinary telegram period is not use heat storage boiler to carry out accumulation of heat as far as possible, the stored heat of heat storage boiler uses when paying the utmost attention to for the peak electricity, and remaining amount of stored heat is used further to the heat supply of ordinary telegram period after the amount of stored heat when removing the peak electricity.For ordinary telegram period heating load and the difference that can supply amount of stored heat, at first use direct heating furnace to supply, the part of direct heating furnace tonifying for the deficiency considers to make regenerative furnace to carry out accumulation of heat in the ordinary telegram period again to be provided, when only the heat that can hold in the ordinary telegram period at direct heating furnace and regenerative furnace all can't satisfy the heat demand amount of ordinary telegram period, the amount of stored heat when re-using the preparation that stores in the regenerative furnace and being used for the peak electricity.

C1 '. as n ₁≤ n, then institute's heat requirement is all by n the ordinary telegram period ₁The heat release of platform regenerative furnace provides, as n＜n ₁, the amount of stored heat H of regenerative furnace when then calculating the end of paddy electricity _{Hold paddy}

C2 ' if. m ₁≤ m, then H _{Hold paddy}=n * H _{Hold meter}If, m＜m ₁, H then _{Hold paddy}=n * H _{Hold meter}-(H _Paddy-m * P _Directly* t _Paddy* η _Directly); Calculate a numerical value n again ₂, make (n ₂-1) * H _{Hold meter}＜H _Flat+ H _{The peak}＜n ₂* H _{Hold meter}

C3 ' if. n ₂* H _{Hold meter}≤ H _{Hold paddy}, then start n ₂The heat release of platform regenerative furnace; If H _{Hold paddy}＜n ₂* H _{Hold meter}, then start the heat release of n platform regenerative furnace, and enter step c4 ';

C4 '. calculate ordinary telegram period n available total amount of heat H of regenerative furnace _{Residual flat}=H _{Hold paddy}-H _{The peak}

C5 '. the heat supply and demand of calculating the ordinary telegram period is poor: H _Adjustment=H _Flat-H _{Residual flat}

C6 ' .t _FlatBe the time span of system's location ordinary telegram, then calculate a numerical value m ₂, make (m ₂-1) * P _Directly* t _Flat* η _Directly＜H _Adjustment＜m ₂* P _Directly* t _Flat* η _Directly

C7 ' if. m ₂≤ m then starts m ₂The platform direct heating furnace; If m＜m ₂, then start whole m platform direct heating furnaces;

C8 '. calculate the operation strategy of ordinary telegram period heat storage boiler: if the m that calculates among the step c7 ' ₂≤ m then starts n platform regenerative furnace and m ₂The platform direct heating furnace carries out heat release; If the m＜m that calculates among the step c7 ' ₂, then regenerative furnace also will carry out accumulation of heat in the ordinary telegram period; Calculate H _{Hold flat}=H _Adjustment-m * P _Directly* t _Flat* η _DirectlyCalculate again: t _{Hold flat}=H _{Hold flat}/ (n * P _Hold* η _Hold); If t _{Hold flat}≤ t _Flat, at t _{Hold Flat}In period, start the accumulation of heat of n platform heat storage boiler; If t _Flat≤ t _{Hold flat}, then at all t _FlatIn period, start the accumulation of heat of n platform heat storage boiler;

D '. determine the operation strategy of the heat storage boiler system of peak electricity period: principle is to avoid using the peak as far as possible, in the paddy electricity and the operation strategy of ordinary telegram period again, can not go to use the amount of stored heat of reserving as the peak electricity period generally speaking, if under the situation that must use the peak electricity (please refer to the description of ordinary telegram period), at first use the direct heating furnace heat supply, when the direct heating furnace heat supply is not enough, re-uses regenerative furnace and carry out putting while holding.

D1 ' if. the n that calculates among the described step b5 ' ₁≤ n illustrates that then the amount of stored heat in the heat storage boiler can satisfy the peak electricity heat demand amount in period, then at peak electricity n in period ₁The platform heat storage boiler all starts heat release, if n＜n ₁If, the n that calculates among the then described step c3 ' ₂≤ n is at peak electricity n in period ₂The platform heat storage boiler starts heat release;

D2 ' if. the n＜n that calculates among the described step c3 ' ₂, then judge the t among the described step c8 ' _{Hold flat}If, t _{Hold flat}≤ t _Flat, illustrating that then the amount of stored heat in the heat storage boiler can satisfy the peak electricity heat demand amount in period, electricity n platform heat storage boiler in period all starts heat release at the peak; If t _Flat≤ t _{Hold flat}, then the amount of stored heat of peak electricity heat storage boiler in period is not enough, under the situation of starting the heat release of n platform heat storage boiler, enters steps d 3 ';

D3 '. the heat supply and demand of calculating peak electricity period is poor: H _{The peak is poor}=(t _{Hold flat}-t _Flat) * n * P _Hold* η _Hold

D4 '. determine the peak electricity direct heating furnace operation strategy in period: t _{The peak}Be the time span of peak, system location electricity, then calculate a numerical value m ₃, make (m ₃-1) * P _Directly* t _{The peak}* η _Directly＜H _{The peak is poor}＜m ₃* P _Directly* t _{The peak}* η _Directly

D5 ' if. m ₃≤ m then starts m ₃The platform direct heating furnace; If m＜m ₃, then start whole m platform direct heating furnaces;

D6 '. determine the peak electricity regenerative furnace operation strategy in period: if the m that calculates in the steps d 5 ' ₃≤ m then starts n platform regenerative furnace and m ₃The platform direct heating furnace carries out heat release; If the m＜m that calculates in the steps d 5 ' ₃, then regenerative furnace also will carry out accumulation of heat period at the peak electricity; Calculate H _{Hold the peak}=H _{The peak is poor}-m * P _Directly* t _{The peak}* η _DirectlyCalculate again: t _{Hold the peak}=H _{Hold the peak}/ (n * P _Hold* η _Hold); If t _{Hold the peak}≤ t _{The peak}, at t _{Hold the peak}In period, start the accumulation of heat of n platform heat storage boiler; If t _{The peak}≤ t _{Hold the peak}, then at all t _{The peak}In period, start the accumulation of heat of n platform heat storage boiler.If the situation that needs n platform regenerative furnace to carry out accumulation of heat at the peak in the electricity period simultaneously, then total amount of stored heat of explanation design is less than normal, should consider to increase the quantity of heat storage boiler.

If paddy electricity period, ordinary telegram period and peak, back electricity period are spaced apart, when the ordinary telegram period needs the heat storage boiler accumulation of heat, at first carrying out accumulation of heat in the period near the ordinary telegram of peak, back before the electricity period.When the peak electricity period needs the heat storage boiler accumulation of heat, at first carrying out accumulation of heat in the electricity period near the peak of ordinary telegram after the period.

Lift a control examples of using the described method of the foregoing description below:

Adopt 2 regenerative furnaces, effective storage capacity 100m in this example ³, installed power 990KW, 2 direct heating water stoves, installed power 330KW, both are 99% at efficient.

The electricity consumption division period in this example is: paddy: 23:00-7:00, ordinary telegram: 11:00-17:00 and 21:00-23:00, peak: 7:00-11:00 and 17:00-21:00.

Step a in corresponding the foregoing description, the calculating amount of stored heat of calculating regenerative furnace:

Calculate regenerative furnace amount of stored heat H according to installed power _{Hold merit}, all be the regenerative furnace heat to be held foot, the regenerative furnace amount of stored heat H that tries to achieve usually at paddy electricity period (8 hours) _{Hold merit}=990 * 8 * 0.99=7841KWH;

Calculate regenerative furnace amount of stored heat H according to the regenerative furnace effective storage capacity _{Hold appearance}If the maximum temperature of regenerative furnace stove water is T _H(℃), the minimum temperature that allows during heat release is T _L(℃), the effective storage capacity of regenerative furnace is V _Hold(m ³); T _H=145 ℃, T _L=70 ℃;

H _{Hold appearance}=100 * 1000 * (145-70) ÷ 860=8721 (KWH)

Get the calculating amount of stored heat H of regenerative furnace _{Hold meter}Be H _{Hold merit}And H _{Hold appearance}The two smaller, i.e. H _{Hold meter}=7841KWH.

Step b in corresponding the foregoing description, determine the operation strategy of the heat storage boiler system of paddy electricity period:

Determine earlier the operation strategy of paddy electricity period (23:00-7:00) direct heating furnace, the quantity of direct heating furnace is two in this example, the paddy electricity period thermal load of calculating according to heating load diagram (Fig. 4):

264KW＜N _Directly* 0.99=330 * 0.99=327KW;

So start a direct heating furnace at paddy electricity period (23:00-7:00).

Determine regenerative furnace operation strategy again,, try to achieve ordinary telegram period customer requirements gross heat input H according to Fig. 4 _Flat=17440KWH, peak electricity period customer requirements gross heat input H _{The peak}=16024KWH,

H _Flat+ H _{The peak}=33464KWH＞2 * H _{Hold meter}=2 * 7841=15682KWH.

So paddy electricity period two Electric heat-storing ovens accumulation of heat simultaneously.

Corresponding above-mentioned steps c determines ordinary telegram period (11:00-17:00 and 21:00-23:00) operation strategy, and in this example, the ordinary telegram period is divided into two sections, is respectively 11:00-17:00 and 21:00-23:00.Wherein the peak electricity period is closelyed follow in the 11:00-17:00 back, and the 21:00-23:00 back is immediately following the paddy electricity period.

H _Flat+ H _{The peak}=33464KWH＞2 * H _{Hold meter}=2 * 7841=15682KWH

H _{Residual flat}=2H _{Hold meter}-H _{The peak}=2 * 7841-16024=-342KWH

H _Flat=17440＞H _{Residual flat}=-324

Determine the operation strategy of ordinary telegram period direct heating furnace, see the 21:00-23:00 period earlier, what this period closelyed follow later is the paddy electricity period, is calculated by Fig. 4 and knows that this period user's thermal load is

240KW＜N _Directly* 0.99=330 * 0.99=327KW,

So start a direct heating furnace at 21:00-23:00.

See the operation strategy of 11:00-17:00 again, the customer requirements heating load

H _{Flat 1}Be H _{Flat 1}=H _Flat-H _{Flat 2}=17440-2 * 240=16960KWH.

Regenerative furnace can be provided for the heating load of 11:00-17:00:

H _{Residual flat 1}Be H _{Residual flat 1}=H _{Residual flat}-regenerative furnace the 21:00-23:00 thermal discharge=-342-0=-342KWH.

H _{Residual flat 1}=-342＜H _{Flat 1}=16960KWH

Know 11:00-17:00 user thermal load＞2N by Fig. 4 calculating _Directly* 0.99=2 * 330 * 0.99=653KW.

So in the 11:00-17:00 ordinary telegram period, start two direct heating furnace heat releases.

Next determine the operation strategy of ordinary telegram period regenerative furnace:

Existing H ' _{Flat 1}=H _{Flat 1}-2N _Directly* 0.99 * (17-11)=16960-2 * 330 * 0.99 * 6=13040KWH;

H _{Residual flat 1}=-342＜H ' _{Flat 1}=13040; Illustrate regenerative furnace need as mentioned above, at first consider to be the 11:00-17:00 accumulation of heat near the period of peak before the electricity period in the accumulation of heat of ordinary telegram period.

Put the limit and hold so need start two accumulation of heat soles at 11:00-17:00,

Accumulation of heat time t _{Hold flat}=(H ' _{Flat 1}-H _{Residual flat 1})/(2 * regenerative furnace installed power * 0.99)=(13040-(342))/(2 * 990 * 0.99)=6.83 hour＞17-11=6; Illustrate that the accumulation of heat that only relies on the 11:00-17:00 period is not enough.

So also need the accumulation of heat that powers on of two regenerative furnaces in the 22:00-23:00 ordinary telegram period.In this example, because the time span of whole ordinary telegram period is 7 hours, and the accumulation of heat time needs 6.83 hours, differs very little, so in order to simplify control, decision is reach 1 hour in 22:00-23:00 period accumulation of heat, rather than 0.83 hour.

After 1 hour, at this moment regenerative furnace also needs at the accumulation of heat time of 11:00-17:00 accumulation of heat t ' in 22:00-23:00 period accumulation of heat _{Hold flat}For

T ' _{Hold flat}=t _{Hold flat}-1=6.83-1=5.83

So decision is in 11:00-16:50 two regenerative furnace accumulation of heats in the period.

According to above-mentioned steps d, determine peak electricity period (8:00-11:00 and 17:00-21:00) operation strategy;

Modern t ' _{Hold flat}=5.83＜6

So whole peak electricity period (8:00-11:00 and 17:00-21:00) only needs two regenerative furnace heat releases, regenerative furnace has no longer needed accumulation of heat.

According to aforesaid control method, the operation strategy of this project boiler room heating equipment is:

Paddy electricity (23:00-7:00) starts a direct heating furnace, two Electric heat-storing oven accumulation of heats

Ordinary telegram (11:00-17:00 21:00-23:00) 11:00-17:00 starts two direct heating furnaces, and two accumulation of heat soles are held the limit and put, and the accumulation of heat time is 11:00-16:50; 21:00-23:00 starts a direct heating furnace, and two accumulation of heat soles are held the limit and put, and the accumulation of heat time is 22:00-23:00.

Two regenerative furnace heat releases of peak electricity (7:00-11:00 17:00-21:00).

Fig. 5 is the control figure as a result that uses above-mentioned example.In this example, use control method of the present invention than using traditional energy-saving control method and can save operating cost 16～21%.

Above-mentioned control method and example are to be used in existing heat storage boiler, have again in the hold over system of directly-heated boiler, for heat storage boiler is only arranged, do not have the hold over system of directly-heated boiler, can use following control method:

Process flow diagram as shown in Figure 3 comprises x platform regenerative furnace in the heat storage boiler system, do not have direct heating furnace, and control method comprises:

A ". calculate the design amount of stored heat of the separate unit regenerative furnace of hold over system:

A1 " but. the paddy accumulation of heat total amount H of electricity period calculated according to installed power _{Hold merit}:

H _{Hold merit}=P _Hold* t _Paddy* η _Hold,

P wherein _HoldBe the regenerative furnace installed power, t _PaddyBe the time span of system's location paddy electricity, η _HoldBe the efficient of regenerative furnace;

A2 ". calculate the accumulation of heat total amount H of regenerative furnace according to the effective storage capacity of regenerative furnace _{Hold appearance}:

H _{Hold appearance}=V _Hold* (T _H-T _L) * 1000 ÷ 860,

V wherein _HoldBe the reservoir capacity of heat storage boiler, T _HBe to design the highest water temperature, T _LIt is the minimum water temperature of design;

A3 ". get H _{Hold merit}And H _{Hold appearance}In a less design amount of stored heat H as the separate unit regenerative furnace _{Hold meter}

B ". determine the operation strategy of the heat storage boiler system of paddy electricity period:

B1 ". calculate paddy user's heat requirement H of electricity period according to the resulting heating load diagram of step f in the claim 1 _Paddy, the formula of use is with the formula among the step c;

B2 ". determine the operation strategy of regenerative furnace, calculate user's heat requirement H of ordinary telegram period according to the heating load diagram of the resulting correction of step f in the claim 1 _FlatWith peak user's heat requirement H of electricity period _{The peak}, the formula of use is with the formula among the step c;

B3 ". the design amount of stored heat H of described x platform regenerative furnace _{Hold meter}At step a3 " in calculate, calculate a numerical value x ₁, make (x ₁-1) * H _{Hold meter}＜H _Paddy+ H _Flat+ H _{The peak}＜x ₁* H _{Hold meter}

B4 " if. x ₁≤ x then starts x ₁Platform accumulation of heat sole is put the limit and is held; If x＜x ₁, then start whole x platform accumulation of heats sole and put the limit and hold;

C ". determine the operation strategy of the heat storage boiler system of ordinary telegram period:

C1 ". as step b4 ", the heating load diagram according to the resulting correction of step f in the claim 1 calculates paddy user's heat requirement H of electricity period equally _Paddy, user's heat requirement H of ordinary telegram period _FlatWith peak user's heat requirement H of electricity period _{The peak}, the formula of use is with the formula among the step c;

C2 ". the design amount of stored heat H of described x platform regenerative furnace _{Hold meter}At step a3 " in calculate, calculate a numerical value x ₂, make (x ₂-1) * (H _{Hold meter}-H _Paddy÷ x)＜H _Flat+ H _{The peak}＜x ₂* (H _{Hold meter}-H _Paddy÷ x);

C3 " if. x ₂≤ x then starts x ₂The heat release of platform regenerative furnace; If x＜x ₂, then start the heat release of x platform regenerative furnace, and enter step c4 ";

C4 ". calculate ordinary telegram period x available total amount of heat H of regenerative furnace _{Residual flat}=x * (H _{Hold meter}-H _Paddy÷ x)-H _{The peak}

C5 ". the heat supply and demand of calculating the ordinary telegram period is poor: H _Adjustment=H _Flat-H _{Residual flat}

C6 ". calculate holding of ordinary telegram period heat storage boiler and move strategy: regenerative furnace also will carry out accumulation of heat in the ordinary telegram period; Calculate H _{Hold flat}=H _AdjustmentCalculate again: t _{Hold flat}=H _{Hold flat}/ (x * P _Hold* η _Hold); If t _{Hold flat}≤ t _Flat, at t _{Hold flat}In period, start the accumulation of heat of x platform heat storage boiler; If t _Flat≤ t _{Hold flat}, then at all t _FlatIn period, start the accumulation of heat of x platform heat storage boiler;

D ". determine the operation strategy of the heat storage boiler system of peak electricity period:

D1 " if. at b3 " in the x that obtains ₁＜x, then peak electricity period x ₁The heat release of platform heat storage boiler; If x＜x ₁, and described step c3 " in the x that calculates ₂≤ x illustrates that then the amount of stored heat in the heat storage boiler can satisfy the peak heat demand amount of electricity period, then at peak electricity period x ₂The platform heat storage boiler all starts heat release;

D2 " if. described step c3 " in x＜x of calculating ₂, then judge described step c6 " in t _{Hold flat}If, t _{Hold flat}≤ t _Flat, illustrating that then the amount of stored heat in the heat storage boiler can satisfy the peak heat demand amount of electricity period, electricity period x platform heat storage boiler all starts discharge at the peak; If t _Flat≤ t _{Hold flat}, then the amount of stored heat of peak electricity period heat storage boiler is not enough, enters steps d 3 ";

D3 ". the heat supply and demand of calculating the peak electricity period is poor: H _{The peak is poor}=(t _{Hold flat}-t _Flat) * x * P _Hold* η _Hold

D4 ". determine the regenerative furnace operation strategy of peak electricity period: regenerative furnace also will carry out in the peak electricity period

Accumulation of heat; Calculate H _{Hold the peak}=H _{The peak is poor}Calculate again: t _{Hold the peak}=H _{Hold the peak}/ (x * P _Hold* η _Hold); If t _{Hold the peak}≤ t _{The peak}, at t _{Hold the peak}In period, start the accumulation of heat of n platform heat storage boiler; If t _{The peak}≤ t _{Hold the peak}, then at all t _{The peak}In period, start the accumulation of heat of x platform heat storage boiler.

If paddy electricity period, ordinary telegram period and peak electricity period are spaced apart, when the ordinary telegram period needs the heat storage boiler accumulation of heat, at first carrying out accumulation of heat in the period near the ordinary telegram of peak, back before the electricity period, when the peak electricity period needs the heat storage boiler accumulation of heat, at first carrying out accumulation of heat in the electricity period near the peak of ordinary telegram after the period.

Control method of the present invention adopts actual measurement operation thermal load, and in addition the temperature modifying factor can improve the degree of accuracy of prediction thermal load greatly.According to exactly determined prediction thermal load, adopt Intelligent Control Theory to determine the operation strategy of Electric heat-storing oven, can guarantee that heat supply is comfortable, can reduce operating cost to greatest extent again.This method is brought up to unprecedented level with the optimal economic operation control of regenerative furnace, and the operating cost of regenerative furnace is reduced greatly.

The foregoing description provides to being familiar with the person in the art and realizes or use this invention; those skilled in the art can be under the situation that does not break away from invention thought of the present invention; the foregoing description is made various modifications or variation; thereby protection scope of the present invention do not limit by the foregoing description, and should be the maximum magnitude that meets the inventive features that claims mention.

Claims (5)

1. the heating load Forecasting Methodology of a heat storage boiler system is used for coming with water the thermal storage electric boiler system of accumulation of heat, and this method may further comprise the steps:

A. divide the water vat place to measure supply water temperature T at boiler _S, measure return water temperature T at the boiler cylinder place that catchments _R, unit is degree centigrade, following temperature unit is degree centigrade, measures the flow Q of water in the heating system return main _H, unit is (m ³/ h), following flux unit is (m ³/ h);

B. calculate heating power N _H=(T _S-T _R) * Q _H* 1000 ÷ 860, thermal power unit is KW, following thermal power unit is KW;

C. calculate t constantly ₁To moment t ₂Between heating load, heating load unit is KWh, following thermal unit is KWh, uses formula:

$H=\underset{t1}{\overset{t2}{\∫}}{N}_H\mathrm{dt}$

Wherein H represents t constantly ₁To moment t ₂Between heating load, N _HExpression is t constantly ₁To moment t ₂Between thermal power;

D. get the moment t that differs 24 hours ₁And t ₂, chronomere is hour, following chronomere is hour, adopts the formula of step c to calculate heating load and draws heating load diagram with respect to the time;

E. calculate second day correction coefficient of heat load K _Repair, wherein, described correction coefficient of heat load K _RepairCalculate according to following formula:

K _Repair=K _{Repair 1}* K _{Repair 2}

K _{Repair 1}Be temperature correction factor, K _{Repair 2}Be the heating area correction factor;

F. calculate second day heating load of prediction:

Prediction heating load=K _Repair* the same day heating load, and the heating load diagram of draw revising.

2. the heating load control method of a heat storage boiler system is used for coming with water the thermal storage electric boiler system of accumulation of heat, comprises n platform regenerative furnace and m platform direct heating furnace in the described heat storage boiler system, and this method may further comprise the steps:

A '. calculate the design amount of stored heat of the separate unit regenerative furnace of hold over system:

A1 ' but. calculate the paddy accumulation of heat total amount H of electricity period according to installed power _{Hold merit}:

H _{Hold merit}=P _Hold* t _Paddy* η _Hold,

P wherein _HoldBe the regenerative furnace installed power, t _PaddyBe the time span of system's location paddy electricity, η _HoldBe the efficient of regenerative furnace;

A2 '. calculate the accumulation of heat total amount H of regenerative furnace according to the effective storage capacity of regenerative furnace _{Hold appearance}:

H _{Hold appearance}=V _Hold* (T _H-T _L) * 1000 ÷ 860,

V wherein _HoldBe the reservoir capacity of heat storage boiler, T _HBe to design the highest water temperature, T _LIt is the minimum water temperature of design;

A3 '. get H _{Hold merit}And H _{Hold appearance}In a less design amount of stored heat H as the separate unit regenerative furnace _{Hold meter}

B '. determine the operation strategy of the heat storage boiler system of paddy electricity period:

B1 '. determine the operation strategy of direct heating furnace, according to described formula: prediction heating load=K _RepairThe heating load diagram of the prediction heating load that * same day, heating load was calculated and the correction of drafting calculates paddy user's heat requirement H of electricity period _PaddyNeed thermal power N with the maximum of paddy electricity period _{H paddy}, the formula of use is

H wherein _PaddyExpression paddy electrical initiation is t constantly ₁Stop t constantly to the paddy electricity ₂Between heating load, N _PaddyThermal power during the expression paddy electricity;

B2 '. the power of described m platform direct heating furnace is P _Directly, t _PaddyBe the time span of system's location paddy electricity, η _DirectlyBe the efficient of direct heating furnace; Then calculate a numerical value m ₁, make (m ₁-1) * P _Directly* η _Directly＜N _{H paddy}＜m ₁* P _Directly* η _Directly

B3 ' if. m ₁≤ m then starts m ₁The heat release of platform direct heating furnace; If m＜m ₁, then start the heat release of whole m platform direct heating furnace;

B4 '. determine the operation strategy of regenerative furnace, according to described formula: prediction heating load=K _RepairThe heating load diagram of the prediction heating load that * same day, heating load was calculated and the correction of drafting calculates user's heat requirement H of ordinary telegram period _FlatWith peak user's heat requirement H of electricity period _{The peak}, the formula of use is

Dt, wherein H _FlatThe initial moment t of expression ordinary telegram ₁Stop initial moment t to ordinary telegram ₂Between heating load, N _FlatThermal power during the expression ordinary telegram;

H wherein _{The peak}Expression peak electrical initiation is t constantly ₁Stop initial moment t to the peak electricity ₂Between heating load, N _{The peak}Thermal power during the expression peak electricity;

B5 '. the design amount of stored heat H of described n platform regenerative furnace _{Hold meter}In step a3 ', calculate, if m ₁≤ m illustrates H _PaddyAll provide, then calculate a numerical value n by direct heating furnace ₁, make (n ₁-1) * H _{Hold meter}＜H _Flat+ H _{The peak}＜n ₁* H _{Hold meter}If n ₁≤ n then starts n ₁The accumulation of heat of platform regenerative furnace; If n＜n ₁, then start the accumulation of heat of whole n platform regenerative furnace; If m＜m ₁, then calculate a numerical value n ₁, make (n ₁-1) * H _{Hold meter}＜H _Paddy-m * P _Directly* t _Paddy* η _Directly+ H _Flat+ H _{The peak}＜n ₁* H _{Hold meter}If n ₁≤ n then starts n ₁Platform accumulation of heat sole is put the limit and is held; If n＜n ₁, then start whole n platform accumulation of heats sole and put the limit and hold;

C '. determine the operation strategy of the heat storage boiler system of ordinary telegram period:

C1 '. as n ₁≤ n, then institute's heat requirement is all by n the ordinary telegram period ₁The heat release of platform regenerative furnace provides, as n＜n ₁, the amount of stored heat H of regenerative furnace when then calculating the end of paddy electricity _{Hold paddy}

C2 ' if. m ₁≤ m, then H _{Hold paddy}=n * H _{Hold meter}If, m ₁＞m, then H _{Hold paddy}=n * H _{Hold meter}-(H _Paddy-m * P _Directly* t _Paddy* η _Directly); Calculate a numerical value n again ₂, make (n ₂-1) * H _{Hold meter}＜H _Flat+ H _{The peak}＜n ₂* H _{Hold meter}

C3 ' if. n ₂* H _{Hold meter}≤ H _{Hold paddy}, then start n ₂The heat release of platform regenerative furnace; If H _{Hold paddy}＜n ₂* H _{Hold meter}, then start the heat release of n platform regenerative furnace, and enter step c4 ';

C4 '. calculate ordinary telegram period n available total amount of heat H of regenerative furnace _{Residual flat}=H _{Hold paddy}-H _{The peak}

C5 '. the heat supply and demand of calculating the ordinary telegram period is poor: H _Adjustment=H _Flat-H _{Residual flat}

C6 ' .t _FlatBe the time span of system's location ordinary telegram, then calculate a numerical value m ₂, make (m ₂-1) * P _Directly* t _Flat* η _Directly＜H _Adjustment＜m ₂* P _Directly* t _Flat* η _Directly

C7 ' if. m ₂≤ m then starts m ₂The heat release of platform direct heating furnace; If m＜m ₂, then start the heat release of whole m platform direct heating furnace;

C8 '. calculate the operation strategy of ordinary telegram period heat storage boiler: if the m that calculates among the step c7 ' ₂≤ m then starts n platform regenerative furnace and m ₂The platform direct heating furnace carries out heat release; If the m＜m that calculates among the step c7 ' ₂, then regenerative furnace also will carry out accumulation of heat in the ordinary telegram period; Calculate the heat requirement H of ordinary telegram period _{Hold flat}=H _Adjustment-m * P _Directly* t _Flat* η _DirectlyCalculate again: the accumulation of heat time t of ordinary telegram period _{Hold flat}=H _{Hold flat}/ (n * P _Hold* η _Hold); If t _{Hold flat}≤ t _Flat, at t _HoldIn the section, start the accumulation of heat of n platform heat storage boiler at ordinary times; If t _Flat≤ t _{Hold flat}, then at all t _FlatIn period, start the accumulation of heat of n platform heat storage boiler;

D '. determine the operation strategy of the heat storage boiler system of peak electricity period:

D1 ' if. the n that calculates among the described step b5 ' ₁≤ n illustrates that then the amount of stored heat in the heat storage boiler can satisfy the peak electricity heat demand amount in period, then at peak electricity n in period ₁The platform heat storage boiler all starts heat release, if n＜n ₁If, the n that calculates among the then described step c3 ' ₂≤ n is at peak electricity n in period ₂The platform heat storage boiler starts heat release;

D2 ' if. the n＜n that calculates among the described step c3 ' ₂, then judge the t among the described step c8 ' _{Hold flat}If, t _{Hold flat}≤ t _Flat, illustrating that then the amount of stored heat in the heat storage boiler can satisfy the peak electricity heat demand amount in period, electricity n platform heat storage boiler in period all starts heat release at the peak; If t _Flat≤ t _{Hold flat}, then the amount of stored heat of peak electricity heat storage boiler in period is not enough, under the situation of starting the heat release of n platform heat storage boiler, enters steps d 3 ';

D3 '. the heat supply and demand of calculating peak electricity period is poor: H _{The peak is poor}=(t _{Hold flat}-t _Flat) * n * P _Hold* η _Hold

D4 '. determine the peak electricity direct heating furnace operation strategy in period: t _{The peak}Be the time span of peak, system location electricity, then calculate a numerical value m ₃, make (m ₃-1) * P _Directly* t _{The peak}* η _Directly＜H _{The peak is poor}＜m ₃* P _Directly* t _{The peak}* η _Directly

D5 ' if. m ₃≤ m then starts m ₃The heat release of platform direct heating furnace; If m＜m ₃, then start the heat release of whole m platform direct heating furnace;

D6 '. determine the peak electricity regenerative furnace operation strategy in period: if the m that calculates in the steps d 5 ' ₃≤ m then starts n platform regenerative furnace and m ₃The platform direct heating furnace carries out heat release; If the m＜m that calculates in the steps d 5 ' ₃, then regenerative furnace also will carry out accumulation of heat period at the peak electricity; Calculate the peak electricity heat requirement H in period _{Hold the peak}=H _{The peak is poor}-m * P _Directly* t _{The peak}* η _DirectlyCalculate again: the accumulation of heat time t in peak electricity period _{Hold the peak}=H _{Hold the peak}/ (n * P _Hold* η _Hold); If t _{Hold the peak}≤ t _{The peak}, at t _{Hold the peak}In period, start the accumulation of heat of n platform heat storage boiler; If t _{The peak}≤ t _{Hold the peak}, then at all t _{The peak}In period, start the accumulation of heat of n platform heat storage boiler.

3. the heating load control method of heat storage boiler as claimed in claim 2 system is characterized in that, comprises x platform regenerative furnace in the described heat storage boiler system, does not have direct heating furnace, and described method comprises:

A ". calculate the design amount of stored heat of the separate unit regenerative furnace of hold over system:

A1 " but. the paddy accumulation of heat total amount H of electricity period calculated according to installed power _{Hold merit}:

H _{Hold merit}=P _Hold* t _Paddy* η _Hold,

P wherein _HoldBe the regenerative furnace installed power, t _PaddyBe the time span of system's location paddy electricity, η _HoldBe the efficient of regenerative furnace;

A2 ". calculate the accumulation of heat total amount H of regenerative furnace according to the effective storage capacity of regenerative furnace _{Hold appearance}:

H _{Hold appearance}=V _Hold* (T _H-T _L) * 1000 ÷ 860,

V wherein _HoldBe the reservoir capacity of heat storage boiler, T _HBe to design the highest water temperature, T _LIt is the minimum water temperature of design;

A3 ". get H _{Hold merit}And H _{Hold appearance}In a less design amount of stored heat H as the separate unit regenerative furnace _{Hold meter}

B ". determine the operation strategy of the heat storage boiler system of paddy electricity period:

B1 ". according to described formula: prediction heating load=K _RepairThe heating load diagram of the prediction heating load that * same day, heating load was calculated and the correction of drafting calculates paddy user's heat requirement H of electricity period _Paddy, the formula of use is

H wherein _PaddyExpression is t constantly ₁To moment t ₂Between heating load, N _PaddyThermal power during the expression paddy electricity;

B2 ". determine the operation strategy of regenerative furnace, according to described formula: prediction heating load=K _RepairThe heating load diagram of the prediction heating load that * same day, heating load was calculated and the correction of drafting calculates user's heat requirement H of ordinary telegram period _FlatWith peak user's heat requirement H of electricity period _{The peak}, the formula of use is

H wherein _FlatThe initial moment t of expression ordinary telegram ₁Stop initial moment t to ordinary telegram ₂Between heating load, N _FlatThermal power during the expression ordinary telegram;

H wherein _{The peak}Expression peak electrical initiation is t constantly ₁Stop initial moment t to the peak electricity ₂Between heating load, N _{The peak}Thermal power during the expression peak electricity;

B3 ". the design amount of stored heat H of described x platform regenerative furnace _{Hold meter}At step a3 " in calculate, calculate a numerical value x ₁, make (x ₁-1) * H _{Hold meter}＜H _Paddy+ H _Flat+ H _{The peak}＜x ₁* H _{Hold meter}

B4 " if. x ₁≤ x then starts x ₁Platform accumulation of heat sole is put the limit and is held; If x＜x ₁, then start whole x platform accumulation of heats sole and put the limit and hold;

C ". determine the operation strategy of the heat storage boiler system of ordinary telegram period:

C1 ". as step b4 ", equally according to described formula: prediction heating load=K _RepairThe heating load diagram of the prediction heating load that * same day, heating load was calculated and the correction of drafting calculates paddy user's heat requirement H of electricity period _Paddy, user's heat requirement H of ordinary telegram period _FlatWith peak user's heat requirement H of electricity period _{The peak}, the formula of use is

H wherein _FlatThe initial moment t of expression ordinary telegram ₁Stop initial moment t to ordinary telegram ₂Between heating load, N _FlatThermal power during the expression ordinary telegram;

H wherein _{The peak}Expression peak electrical initiation is t constantly ₁Stop initial moment t to the peak electricity ₂Between heating load, N _{The peak}Thermal power during the expression peak electricity;

C2 ". the design amount of stored heat H of described x platform regenerative furnace _{Hold meter}At step a3 " in calculate, calculate a numerical value x ₂, make (x ₂-1) * (H _{Hold meter}-H _Paddy÷ x)＜H _Flat+ H _{The peak}＜x ₂* (H _{Hold meter}-H _Paddy÷ x);

C3 " if. x ₂≤ x then starts x ₂The heat release of platform regenerative furnace; If x＜x ₂, then start the heat release of x platform regenerative furnace, and enter step c4 ";

C4 ". calculate ordinary telegram period x available total amount of heat H of regenerative furnace _{Residual flat}=x * (H _{Hold meter}-H _Paddy)-H _{The peak}

C5 ". the heat supply and demand of calculating the ordinary telegram period is poor: H _Adjustment=H _Flat-H _{Residual flat}

C6 ". calculate holding of ordinary telegram period heat storage boiler and move strategy: regenerative furnace also will carry out accumulation of heat in the ordinary telegram period; Calculate H _{Hold flat}=H _AdjustmentCalculate again: t _{Hold flat}=H _{Hold flat}/ (x * P _Hold* η _Hold); If t _{Hold flat}≤ t _Flat, at t _{Hold flat}In period, start the accumulation of heat of x platform heat storage boiler; If t _Flat≤ t _{Hold flat}, then at all t _FlatIn period, start the accumulation of heat of x platform heat storage boiler;

D ". determine the operation strategy of the heat storage boiler system of peak electricity period:

D1 " if. at b3 " in the x that obtains ₁＜x, then peak electricity period x ₁The heat release of platform heat storage boiler;

If x＜x ₁, and described step c3 " in the x that calculates ₂≤ x illustrates that then the amount of stored heat in the heat storage boiler can satisfy the peak heat demand amount of electricity period, then at peak electricity period x ₂The platform heat storage boiler all starts heat release;

D2 " if. described step c3 " in x＜x of calculating ₂, then judge described step c6 " in t _{Hold flat}If, t _{Hold flat}≤ t _Flat, illustrating that then the amount of stored heat in the heat storage boiler can satisfy the peak heat demand amount of electricity period, electricity period x platform heat storage boiler all starts discharge at the peak; If t _Flat≤ t _{Hold flat}, then the amount of stored heat of peak electricity period heat storage boiler is not enough, enters steps d 3 ";

D3 ". the heat supply and demand of calculating the peak electricity period is poor: H _{The peak is poor}=(t _{Hold flat}-t _Flat) * x * P _Hold* η _Hold

D4 ". determine the regenerative furnace operation strategy of peak electricity period: regenerative furnace also will carry out accumulation of heat in the peak electricity period; Calculate H _{Hold the peak}=H _{The peak is poor}Calculate again: t _{Hold the peak}=H _{Hold the peak}/ (x * P _Hold* η _Hold); If t _{Hold The peak}≤ t _{The peak}, at t _{Hold the peak}In period, start the accumulation of heat of x platform heat storage boiler; If t _{The peak}≤ t _{Hold the peak}, then at all t _{The peak}In period, start the accumulation of heat of x platform heat storage boiler.

4. as the heating load control method of claim 2 or 3 described heat storage boiler systems, it is characterized in that, if described paddy electricity period, ordinary telegram period and peak electricity period are spaced apart, when the ordinary telegram period needs the heat storage boiler accumulation of heat, at first carrying out accumulation of heat in the period near the ordinary telegram of peak, back before the electricity period.

5. the heating load control method of heat storage boiler as claimed in claim 4 system is characterized in that, when the peak electricity period needs the heat storage boiler accumulation of heat, is at first carrying out accumulation of heat near the peak of the ordinary telegram period after in the electric period.

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