CN106593771A - Power-heat decoupling system in heat-power cogeneration system and control method thereof - Google Patents
Power-heat decoupling system in heat-power cogeneration system and control method thereof Download PDFInfo
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- CN106593771A CN106593771A CN201611166738.0A CN201611166738A CN106593771A CN 106593771 A CN106593771 A CN 106593771A CN 201611166738 A CN201611166738 A CN 201611166738A CN 106593771 A CN106593771 A CN 106593771A
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B13/00—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion
- G05B13/02—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric
- G05B13/04—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators
- G05B13/042—Adaptive control systems, i.e. systems automatically adjusting themselves to have a performance which is optimum according to some preassigned criterion electric involving the use of models or simulators in which a parameter or coefficient is automatically adjusted to optimise the performance
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The invention discloses a power-heat decoupling system in a heat-power cogeneration system. The power-heat decoupling system comprises a gas generator, a heat-power set, a wind power generation device, a heat storage device, a power-heat conversion device, a power load and a heat load, wherein the gas generator is connected with the power load; the wind power generation device and the heat-power set are connected with the heat storage device through the power-heat conversion device; the heat-power set is connected to the power load, the heat load and the heat storage device respectively; the heat storage device is connected to the heat load. A method comprises the following steps: determining demanded quantity of the heat load and the power load, the purchased wind power unit price, fuel unit price, power selling price and heat selling price; determining power quantity and heat quantity generated by unit fuel and heat generated by unit power quantity through power-heat conversion; solving power of the heat-power set, the heat storage device and the gas generator, interaction power of the wind power generation device and the heat storage device, and interaction power of the heat-power set and the heat storage device; and regulating the heat load and the power load via the heat storage device and the gas generator if the heat load and the power load have fluctuation. Through the power-heat decoupling system, an operation method of ordering power by heat is decoupled; and the problem of the wind power consumption is solved.
Description
Technical field
The invention belongs to Cogeneration Heat electrolysis coupling control technique field, relates generally to the electricity in a kind of co-generation unit
Hot decoupled system and its control method.
Background technology
The northern area of China generator unit structure is more single, and based on fired power generating unit, wherein thermoelectricity unit occupies quite
Big ratio, is also as main heat source.The old thermoelectricity unit in the Northeast faces because of reasons such as peak modulation capacity deficiencies
Transformation, the method for operation of thermoelectricity unit itself " electricity determining by heat " because paying the utmost attention to the demand of thermic load so that negative to electricity
The electric energy that lotus demand is provided can be too little or too much, and coupled thermomechanics relation seriously constrains the peak modulation capacity of thermoelectricity unit, causes electricity
Net fluctuation.
Traditional thermoelectricity unit can be divided into back pressure type unit and condensing-type unit, and back pressure type unit is by all weary of steam turbine
Vapour sends into heating steam pipe network and carries out heat supply, and without cold source energy, efficiency is higher, in the condition for preferentially meeting certain heating power
The fixation of lower generated output cannot be adjusted, and strictly be run by " electricity determining by heat " mode.The thermal power and generated output of condensing-type unit
Without strict restricting relation, under the thermal power of a certain determination, generated output can be adjusted in certain scope, i.e.,
Just thus, adjustable extent can not effectively improve thermoelectricity unit peak modulation capacity, its method of operation falls within " electricity determining by heat ".Currently
Present situation can't be efficiently modified completely to thermoelectricity unit, it is impossible to decouple the method for operation of " electricity determining by heat ".Although for heat
The method of group of motors peak modulation capacity optimal control, has been made that many feasibility studies, and also achieves one to a certain extent
A little progress and achievement, but these researchs fundamentally do not decouple the method for operation of thermoelectricity unit " electricity determining by heat ", simply
Peak regulation is carried out in certain adjustable extent, it is impossible to improve peak load regulation ability, heating power and generated output in flexibility and reliability ground
A kind of coupled relation is still suffered from, after beyond adjustable extent, thermoelectricity unit still can not be tackled well.
The coupled thermomechanics method of operation of Conventional thermoelectric unit is hot mainly from thermal load demands are preferentially met as starting point
Group of motors can also produce the electric energy of respective amount while a certain amount of heat energy is produced.For the electric energy that thermoelectricity unit is produced, electricity
Net all will be received unconditionally, and this causes electric energy supply and demand that imbalance may occur.Especially night in the winter time, electrical load requirement
Few, thermal load demands are more, and electrical network receives excessive electric energy to produce fluctuation to electrical network, affects grid stability, also results in electricity
Can cannot make full use of, cause energy waste and the uneconomical operation of steam power plant.
Meanwhile, China's Wind Power Generation Industry has quite a few all to concentrate on northern area, and annual wind-electricity integration amount also increases year by year
Plus, but the problem of dissolving that the extensive development of wind-powered electricity generation brings therewith is also increasingly severe, is wasted if can make full use of and abandon wind
The energy, it will on future source of energy general layout change bring very impact greatly.
The content of the invention
To realize thermoelectricity decoupling operation and being optimal running status this target, the present invention proposes a kind of cogeneration of heat and power
Electric heating decoupled system and its control method in system.
Technical scheme is as follows：
A kind of electric heating decoupled system in co-generation unit, including gas electricity generator, thermoelectricity unit, wind-power electricity generation dress
Put, heat-storing device, electricity-heat converter, electric load and thermic load；Electric load, including lighting installation, household electrical appliance and industrial
Electric equipment；Thermic load, including industrial heat equipment and civil heating equipment；Gas electricity generator, Jing supply networks are straight with electric load
Connect and be connected；Wind power generation plant, is connected by electricity-heat converter Jing heat pipes with heat-storing device；Thermoelectricity unit, Jing powers
To electric load, Jing heat supply networks are connected to thermic load to network connection, and Jing heat pipes are connected to heat-storing device；Thermoelectricity unit, Jing supply networks
It is connected with electricity-heat converter, electricity-heat converter Jing heat pipes are connected with heat-storing device；Heat-storing device, Jing heat supply networks are born with heat
Lotus is joined directly together and connects.
A kind of control method of the electric heating decoupled system in co-generation unit, comprises the following steps：
Step 1：Wind-powered electricity generation unit price, the fuel of thermoelectricity unit for determine the demand of thermic load, the demand of electric load, buying
Unit price and gas electricity generator cooler fuel price, sell caloric value and sale of electricity valency；
Step 2：Determine the electricity that the electricity and heat of the generation of thermoelectricity unit unit of fuel, the combustion gas of gas electricity generator unit are produced
Amount and unit quantity of electricity change the heat for producing by electric heating；
Step 3：According to the demand and the demand of electric load of thermic load, thermoelectricity unit is gone out by PSO Algorithm
Generated output and heating power, the heating power of heat-storing device, the generated output of gas electricity generator, and wind power generation plant
With heat-storing device interact power and thermoelectricity unit and heat-storing device interact power, co-generation unit is put down meeting supply and demand
While weighing apparatus, thermoelectricity decoupling is realized；
Step 4：Co-generation unit reaches balance Jing after step 3, if fluctuation occur in thermic load and electric load, is filled by heat accumulation
Put and adjusted with gas electricity generator, scope of the adjustment cost less than steam power plant's setting.
Step 4.1：When adjustment cost is not less than set point, the change of thermal load demands and electrical load requirement is judged respectively
Trend；
If electrical load requirement increases, the generated output of gas electricity generator is improved；
If electrical load requirement is reduced, determine whether that gas electricity generator runs；If there is the situation that gas electricity generator runs
Under, reduce the generated output of gas electricity generator；If in the case of running without gas electricity generator, by the unnecessary of thermoelectricity unit generation
Electric energy Jing electric heating converter devices are converted into thermal energy storage to heat-storing device；
If thermal load demands increase, the heating power of heat-storing device is improved；
If thermal load demands are reduced, determine whether that heat-storing device runs；If in the case of having heat-storing device to run, drop
The heating power of low heat-storing device；If in the case of running without heat-storing device, many waste heat energies that thermoelectricity unit is produced are direct
Store into heat-storing device；
Step 4.2：If adjustment cost exceedes set point, return to step 3.
Particle in particle cluster algorithm, including heating power, the combustion gas that wind power generation plant Jing electricity-heat converters are provided
Electrical power, the thermoelectricity unit that the generated output of electromotor, the heating power of heat-storing device, thermoelectricity unit are provided to electric load is to warm
The thermal power of load offer, thermoelectricity unit carry out the electrical power and thermoelectricity unit of electric accumulation of heat directly to heat-storing device to heat-storing device
The thermal power of accumulation of heat.
Fitness value in particle cluster algorithm, refers to the functional value with co-generation unit operating cost as object function.
Beneficial effects of the present invention are as follows：
Typically can all be equipped with gas electricity generator to improve the peak modulation capacity of thermoelectricity unit in steam power plant, but can not be from root
Solve the problems, such as that peak modulation capacity is not enough in sheet.For the problems referred to above, the present invention by configure in steam power plant heat-storing device and
Gas electricity generator not only can decouple " electricity determining by heat " method of operation improving the peak modulation capacity of thermoelectricity unit, can also be by electricity
Accumulation of heat increases wind-powered electricity generation online space come wind-powered electricity generation of dissolving, and improves wind energy utilization.This current northern area of method energy effectively solving
Steam power plant faces the problem of transformation because of peak modulation capacity deficiency, and to a certain extent can asking with effectively solving wind electricity digestion
Topic.
Description of the drawings
Fig. 1 is that the energy transmission of the electric heating decoupled system in the co-generation unit in the specific embodiment of the invention is illustrated
Figure；
Fig. 2 is the base of the control method of the electric heating decoupled system in the co-generation unit in the specific embodiment of the invention
This flow chart；
Fig. 3 is the flow chart of the solution optimum particle position in the specific embodiment of the invention.
Specific embodiment
The present invention proposes electric heating decoupled system and its control method in a kind of co-generation unit, thermoelectricity decoupling operation
Mode, be exactly the generation of heat energy and electric energy is not mutually restricted with the change of heat user and electric user's request, by using heat accumulation
Device and gas electricity generator are remained to meet different heat and used reaching in the case of thermic load and electrical load requirement skewness
Family and the requirement of electric user's request, and grid stability is not affected, maintain equilibrium of supply and demand relation.Although this method of operation does not have
From thermoelectricity unit in itself decoupling thermoelectricity relation, but thermoelectricity relation, flexibility and reliability are decoupled from the angle of co-generation unit
Ground improves co-generation unit peak modulation capacity, effectively solves the problems, such as that current steam power plant's peak modulation capacity is not enough.
A kind of electric heating decoupled system in co-generation unit, including gas electricity generator, thermoelectricity unit, wind-power electricity generation dress
Put, heat-storing device, electricity-heat converter, electric load and thermic load；Electric load, including lighting installation, household electrical appliance and industrial
Electric equipment；Thermic load, including industrial heat equipment and civil heating equipment；Gas electricity generator, Jing supply networks are straight with electric load
Connect and be connected；Wind power generation plant, is connected by electricity-heat converter Jing heat pipes with heat-storing device；Thermoelectricity unit, Jing powers
To electric load, Jing heat supply networks are connected to thermic load to network connection, and Jing heat pipes are connected to heat-storing device；Thermoelectricity unit, Jing supply networks
It is connected with electricity-heat converter, electricity-heat converter Jing heat pipes are connected with heat-storing device；Heat-storing device, Jing heat supply networks are born with heat
Lotus is joined directly together and connects.The energy transmission schematic diagram of the electric heating decoupled system in co-generation unit is as shown in Figure 1.
A kind of control method of the electric heating decoupled system in co-generation unit, comprises the following steps：
Step 1：Wind-powered electricity generation unit price, the fuel of thermoelectricity unit for determine the demand of thermic load, the demand of electric load, buying
Unit price and gas electricity generator cooler fuel price, sell caloric value and sale of electricity valency；
Step 2：Determine the electricity that the electricity and heat of the generation of thermoelectricity unit unit of fuel, the combustion gas of gas electricity generator unit are produced
Amount and unit quantity of electricity change the heat for producing by electric heating；
Step 3：According to the demand and the demand of electric load of thermic load, thermoelectricity unit is gone out by PSO Algorithm
Generated output and heating power, the heating power of heat-storing device, the generated output of gas electricity generator, and wind power generation plant
With heat-storing device interact power and thermoelectricity unit and heat-storing device interact power, co-generation unit is put down meeting supply and demand
While weighing apparatus, thermoelectricity decoupling is realized；
Step 4：Co-generation unit reaches balance Jing after step 3, if fluctuation occur in thermic load and electric load, is filled by heat accumulation
Put and adjusted with gas electricity generator, scope of the adjustment cost less than steam power plant's setting.
Step 4.1：When adjustment cost is not less than set point, the change of thermal load demands and electrical load requirement is judged respectively
Trend；
If electrical load requirement increases, the generated output of gas electricity generator is improved；
If electrical load requirement is reduced, determine whether that gas electricity generator runs；If there is the situation that gas electricity generator runs
Under, reduce the generated output of gas electricity generator；If in the case of running without gas electricity generator, by the unnecessary of thermoelectricity unit generation
Electric energy Jing electric heating converter devices are converted into thermal energy storage to heat-storing device；
If thermal load demands increase, the heating power of heat-storing device is improved；
If thermal load demands are reduced, determine whether that heat-storing device runs；If in the case of having heat-storing device to run, drop
The heating power of low heat-storing device；If in the case of running without heat-storing device, many waste heat energies that thermoelectricity unit is produced are direct
Store into heat-storing device；
Step 4.2：If adjustment cost exceedes set point, return to step 3.
The basic flow sheet of the control method of the thermoelectricity decoupled system in co-generation unit is as shown in Figure 2.
Particle in particle cluster algorithm, including heating power, the combustion gas that wind power generation plant Jing electricity-heat converters are provided
Electrical power, the thermoelectricity unit that the generated output of electromotor, the heating power of heat-storing device, thermoelectricity unit are provided to electric load is to warm
The thermal power of load offer, thermoelectricity unit carry out the electrical power and thermoelectricity unit of electric accumulation of heat directly to heat-storing device to heat-storing device
The thermal power of accumulation of heat.
Fitness value in particle cluster algorithm, refers to the functional value with co-generation unit operating cost as object function.
From the point of view of current situation for current Large Copacity heat-storage technology, large-capacity phase change heat-storing device is undoubtedly cogeneration of heat and power
The optimal choice of system, for other heat accumulation modes, large-capacity phase change heat-storing device energy storage density is higher, in release heat
Temperature approximately constant when and can store heat energy, can store relatively large number of heat energy with the volume of very little.In the present invention, pin
Problem to steam power plant's transformation, can select using the large-capacity phase change heat-storing device that heat accumulation is carried out using phase-change material.
Although heat-storing device can decouple the method for operation of coupled thermomechanics, how to distribute gas electricity generator, thermoelectric perpetual motion machine
The size of exerting oneself of group and heat-storing device is also particularly important, reasonably regulates and controls gas electricity generator, thermoelectricity unit and heat-storing device
Size of exerting oneself, make co-generation unit in the minimum running status of cost, so the not only decoupling fortune of " electricity determining by heat "
Line mode, the benefit that can also make steam power plant reaches maximization.
The size of exerting oneself of gas electricity generator, thermoelectricity unit and heat-storing device, it is bent according to the day thermoelectricity workload demand in area
Line chart is doing, so that it is determined that exert oneself size and the heat-storing device of the size of exerting oneself of gas electricity generator, thermoelectricity unit are exerted oneself
Size, and the number of electric energy that heat-storing device is sent by the wind power generation plant that electric heating converter device is obtained, heat-storing device
The number of the electric energy that the thermoelectricity unit of acquisition sends, and the number of heat energy that heat-storing device direct access thermoelectricity unit sends.Heat
During load boom period, thermoelectricity unit heat is exerted oneself increase, and due to unit itself coupled thermomechanics relation, electrical power can also increase, exceed
The required power of electric load, unnecessary electrical power is delivered in heat-storing device by electricity-heat converter, and not enough thermal power is then
Supplemented by heat-storing device.The process of whole regulation and control is needed according to electricity price and caloric value and gas electricity generator, thermoelectricity unit and storage
The operating cost of thermal is adjusting, it is possible to which jet dynamic control can go out a part of electrical power, it is also possible to heat-storing device
The electrical power for obtaining wind-powered electricity generation accumulation of heat is some more, and this is accomplished by setting up with co-generation unit operating cost as object function, leads to
Cross the optimal solution of heating power, gas electricity generator that particle cluster algorithm show that wind power generation plant Jing electricity-heat converters provide
The electrical power that the optimal solution of generated output, the optimal solution of the heating power of heat-storing device, thermoelectricity unit are provided to electric load is most
The optimal solution of the thermal power that excellent solution, thermoelectricity unit are provided to thermic load, thermoelectricity unit carry out the electric work of electric accumulation of heat to heat-storing device
Optimal solution of the optimal solution and thermoelectricity unit of rate directly to the thermal power of heat-storing device accumulation of heat carrys out optimal control method, so that
Electric heating decoupled system in co-generation unit is optimal running status, and makes steam power plant's maximizing the benefits.
For the method for operation of co-generation unit " electric heating decoupling ", operating cost is decoupled as target with co-generation unit
Function, on the premise of meet the constraint condition, using PSO Algorithm optimal solution.The present invention is using particle cluster algorithm as asking
Solution instrument.Optimizing is minimized with co-generation unit operating cost, when cost minimization is solved, by calculating ambient particles position
Determination optimum particle position is put, so as to obtain optimal solution, process step is solved as follows：
The first step：Operating cost, the combustion gas of cost in object function, i.e. thermoelectricity unit in unit interval t
Motor sends the heat cost of heat-storing device in the cost of electrical power, unit interval t to thermic load heat supply in unit interval t,
Particle dimension in arrange colonyParticle in colony, including the confession that wind power generation plant Jing electricity-heat converters are provided
Thermal power ηcPf, gas electricity generator generated output Pr, heat-storing device heating power HP, thermoelectricity unit provides to electric load
Electrical power Pbq, thermal power h that provides to thermic load of thermoelectricity unitbq, thermoelectricity unit the electrical power of electric accumulation of heat is carried out to heat-storing device
Pr.dWith thermoelectricity unit directly to thermal power h of heat-storing device accumulation of heatr.d, and limit computational accuracy εpsoAnd maximum iteration time
Kmax。
When object function is set up, due to it is contemplated that the control method of explanation thermoelectricity decoupling, therefore at the beginning of not considering equipment
The cost such as phase cost of investment, plant maintenance and management cost and other costs of labor, co-generation unit operating cost CS
Cost expressions used are shown below in unit interval t：
CS=Σ Cb+ΣCq+Cr+Cc.r-Csell.d-Csell.h
Wherein, CbFor operating cost of the separate unit back pressure type unit in unit interval t, CqIt is separate unit condensing-type unit in list
Operating cost in the time t of position, CrFor the cost that gas electricity generator sends electrical power in unit interval t, Cc.rFor the unit time
In t heat cost from heat-storing device to thermic load heat supply, in unit interval t heat cost from heat-storing device to thermic load heat supply,
It is primarily referred to as heat-storing device and obtains wind power generation plant sending electric energy and carry out the cost of accumulation of heat through electricity-heat converter, and thermoelectricity
Unit carries out being carried out after electric heating conversion the cost and thermoelectricity unit of heat accumulation and directly carries out the cost of heat accumulation in thermoelectric perpetual motion machine composition sheet
In take into account, do not consider further that herein, Csell.d、Csell.hThe income of electric energy and heat energy is sold in respectively unit interval t.Target
Function does not consider that heat-storing device loses the cost of heat energy, and the cost source for losing heat energy is complex, it may be possible to buy wind-force
TRT sends electric energy and carrys out the cost of accumulation of heat through electricity-heat converter, it is also possible to which thermoelectricity unit to heat-storing device is passed through
Electricity-heat converter carrys out the cost of accumulation of heat or direct accumulation of heat, and depending on needing according to practical situation, therefore the present invention does not consider this part
Cost Problems.
Operating cost C of the separate unit back pressure type unit in unit interval tbCan be by fuel cost Cfuel.bWith separate unit back pressure type
Unit Commitment cost Cqt.bConstitute, its expression formula is：
Cb=Cfuel.b+Cqt.b
Unit interval t fuel cost can be expressed as the quadric form for sending power of thermoelectricity unit, and its expression formula is：
Cfuel.b=[am(Pb)2+bmPb+cm]Cfuel.d
In above formula, am、bm、cmFor the coal-fired coefficient of back pressure type unit m, PbBe back pressure type unit in unit interval t sends out
Electrical power, Cfuel.dFor the cost of unit Coal-fired capacity, separate unit back pressure type Unit Commitment cost Cqt.bCan be considered fixed value.
The generated output of back pressure type unit is presented linear coupling relation with heating power, and its expression formula is：
hb=k1Pb+k2
In above formula, k1、k2For the coefficient of coup, hbFor the heating power of back pressure type unit in unit time t, PbFor back pressure type
Generated output of the unit in unit interval t.
Back pressure type unit carries out heat supply by the use of the exhaust steam that steam turbine is discharged as thermal source, solidifying by taking single condensing-type unit as an example
Bleeding point is housed on the steam turbine cylinder of vapour formula unit, the vapourss under certain pressure can be therefrom extracted out, then condensing-type unit
Operating cost expression formula is：
Cq=Cfuel.q+Cqt.q
In formula, Cfuel.qFor the fuel cost of single condensing-type unit, Cqt.qFor single condensing-type Unit Commitment cost.
Live steam amount D of single condensing-type unit can be by the generated output P of single condensing-type unitqWith drawing gas for single condensing-type unit
Amount D1It is expressed as：
D=d1D1+d2Pq
In formula, d1、d2For fitting coefficient.
Cfuel.q=[q1D2+q2PD+q3P2+q4D+q5P+q6]Cfuel.d
In formula, q1、q2、q3、q4、q5、q6For coal-fired coefficient.
Although condensing-type unit can within the specific limits adjust electrical power, to a certain extent, coupled thermomechanics relation is still
Exist, electrical power is complex with thermal power relation, it is of the invention by condensing-type unit thermoelectricity relation and the thermoelectricity of back pressure type unit
Relation is considered as identical, and its expression formula is：
hq=k1Pq+k2
In formula, hqFor the heating power of condensing-type unit in unit time t, k1、k2For the coefficient of coup, PqFor condensing-type machine
The generated output of group.
When solving to object function, not considering the different of machine set type heating power and generated output will be caused to close
The difference of system.
Gas electricity generator sends the cost of electrical power in unit interval t：
Cr=Cfuel.r+Cqt.r
In above formula, Cfuel.rFor the fuel cost of gas electricity generator in unit time t；Cqt.rFor gas electricity generator start and stop into
This；CngFor the unit price of natural gas；VrFor the amount of natural gas that gas electricity generator in unit time t is consumed；PrFor unit time t
The electrical power of interior gas electricity generator output；ηrFor the generating efficiency of gas electricity generator；L is natural gas Lower heat value.
Heat cost of the heat-storing device to thermic load heat supply in unit interval t：
Cc.r=ηcPfCf.d
In above formula, ηcFor the efficiency of the thermo-electric conversion of heat-storing device；PfIt is heat-storing device in unit time t from wind-power electricity generation
The electrical power that device is obtained；Cf.dFor the univalent cost that wind-powered electricity generation is obtained from electrical network after wind-electricity integration.
From the point of view of total system, in Practical Calculation, operating cost that can be by separate unit back pressure type unit in unit interval t
CbWith separate unit condensing-type unit unit interval t operating cost CqIt is considered as identical, i.e. Cb=Cq, and in the present embodiment, with
Operating cost C of the separate unit back pressure type unit in unit interval tbAs a example by, and make Cb=C, wherein C are thermoelectricity unit in unit
Operating cost in time t, then object function is rewritable is：
Cs=Σ C+Cr+Cc.r-Csell.d-Csell.h
Second step：According to the thermal load demands amount and electrical load requirement amount and electricity price in each cycle in unit interval t and
Caloric value sets translational speed v of each particle and the scope of position x initializing the position of each particle.
3rd step：The initial fitness value of particle of co-generation unit operating cost in the required time period is calculated, while note
Record each particle individuality extreme value and population extreme value in each cycle in the time period.
4th step：Each particle fitness value is compared with its individual extreme value, it is such as more excellent, then update current individuality
Extreme value Cbest.i, such as more excellent while each particle fitness value and population optimal value are compared, then Population Regeneration optimal value
Cbest。
5th step：Position and speed formula according to particle, is updated to particle.If particle position phase after renewal
The parameter answered be unsatisfactory for co-generation unit power Constraints of Equilibrium, heat supply Constraints of Equilibrium, thermoelectricity unit units limits, heat accumulation constraint
With heat-storing device constraint etc. constraints, then particle is regenerated, until meet the constraint condition.If update times exceed setting
Number of times, then replaced with former feasible particle.Speed is as follows with location updating formula：
In formula, d=1,2,3,4；ω is inertia weight；c1, c2For Studying factors；r1, r2For be uniformly distributed in (0,1) with
Machine number；vi, xiSpeed and position for i-th particle, subscript k+1 represents that the speed of i-th particle and the kth time of position update.
Power supply Constraints of Equilibrium refers to that the electrical power sum that the electrical power that thermoelectricity unit sends sends with gas electricity generator is equal to
Electrical power needed for electric load, i.e.,
ΣPbq+Pr=PQ
In formula, Pbq、Pr、PQSeparate unit thermoelectricity unit is provided to electric load in respectively unit interval t electrical power, combustion gas
Electrical power needed for electrical power that group of motors sends and electric load.
Heat supply Constraints of Equilibrium refers to that the heating power of thermoelectricity unit is equal to thermic load with the heating power sum of heat-storing device
Required thermal power, i.e.,
Σhbq+HP=HQ
In formula, hbq、HPAnd HQHeating power, the heat-storing device heat supply of separate unit thermoelectricity unit in unit interval t are represented respectively
Thermal power needed for power and thermic load.
Thermoelectricity unit units limits, including thermoelectricity unit electrical power units limits, thermoelectricity unit thermal power units limits and
The electrical power units limits that gas electricity generator sends.
Because back pressure type unit and condensing-type unit can carry out power constraint with the inequality of same form, then thermoelectricity unit
Electrical power units limits, i.e.,：
Pmin.l≤Pl≤Pmax.l
Pl=Pbq+Pr.d
In formula, Pmax.lAnd Pmin.lBe the electrical power that thermoelectricity unit sends bound constraint, PbqIt is negative to electricity for thermoelectricity unit
The electrical power that lotus provides, Pr.dFor the electrical power that thermoelectricity unit is provided to heat-storing device, PlFor the electrical power that thermoelectricity unit sends.
Thermoelectricity unit thermal power units limits are：
0≤h≤hmax
H=hbq+hr.d
In formula, hmaxRepresent that thermoelectricity unit thermal power is exerted oneself maximum, hbqFor the hot merit that thermoelectricity unit is provided to thermic load
Rate, hr.dFor the thermal power that thermoelectricity unit is directly provided to heat-storing device, h exerts oneself for thermoelectricity unit thermal power.
The electrical power units limits that gas electricity generator sends are：
Pmin.r≤Pr≤Pmax.r
In formula, Pmin.r、Pmax.rThe bound constraint of the electrical power sent for gas electricity generator, PrSend for gas electricity generator
Electrical power.
Heat accumulation is constrained, including heat-storing device interacts electrical power constraint, heat-storing device with wind power generation plant from thermoelectricity unit
Obtaining electric energy carries out being supplied to the electrical power of heat-storing device to constrain after electric heating conversion and heat-storing device direct access thermoelectricity unit heat
Power constraint.
Heat-storing device interacts electrical power constraint with wind power generation plant, i.e.,：
In formula,For the bound that heat-storing device interacts electrical power with wind power generation plant, PfFor heat-storing device
Electrical power is interacted with wind power generation plant.
Heat-storing device obtains electric energy and carries out being supplied to heat-storing device electrical power to constrain after electric heating conversion from thermoelectricity unit, i.e.,：
In formula,Obtaining electric energy from thermoelectricity unit for heat-storing device carries out being supplied to heat accumulation to fill after electric heating conversion
The electrical power bound put, Pr.dObtaining electric energy from thermoelectricity unit for heat-storing device carries out being supplied to heat-storing device after electric heating conversion
Electrical power.
Heat-storing device direct access thermoelectricity unit thermal power is constrained, i.e.,：
In formula,For the thermal power bound that heat-storing device obtains thermoelectricity unit, hr.dDirectly obtain for heat-storing device
Take thermoelectricity unit thermal power.
Heat-storing device is constrained, i.e.,：
Hmin.P≤HP≤Hmax.P
Hmin.r≤Hr≤Hmax.r
In formula, Hmax.P、Hmin.PFor thermal power bound from heat-storing device to thermic load heat supply, HPIt is negative to heat for heat-storing device
The thermal power of lotus heat supply, Hmax.r、Hmin.rFor the bound of heat-storing device heat storage capacity, HrFor the heat storage capacity of heat-storing device.
6th step：For seek each particle optimal value, i.e., wind power generation plant Jing electricity-heat converters provide heat supply
Power ηcPfOptimal value, the generated output P of gas electricity generatorrOptimal value, the heating power H of heat-storing devicePOptimal value,
The electrical power P that thermoelectricity unit is provided to electric loadbqOptimal value, thermal power h that provides to thermic load of thermoelectricity unitbqOptimum
Value, thermoelectricity unit carry out the electrical power P of electric accumulation of heat to heat-storing devicer.dOptimal value and thermoelectricity unit directly to heat-storing device store
Thermal power h of heatr.dOptimal value, particle position and speed are updated to the 5th step by repeatedly the 3rd step of circulation, obtain particle
Optimal solution, i.e., wind power generation plant Jing electricity-heat converters provide heating power ηcPfOptimal solution, gas electricity generator send out
Electrical power PrOptimal solution, the heating power H of heat-storing devicePOptimal solution, the electrical power P that provides to electric load of thermoelectricity unitbq
Optimal solution, thermal power h that provides to thermic load of thermoelectricity unitbqOptimal solution, thermoelectricity unit carry out electric accumulation of heat to heat-storing device
Electrical power Pr.dOptimal solution and thermoelectricity unit directly to thermal power h of heat-storing device accumulation of heatr.dOptimal solution.
7th step：Whether evaluation algorithm terminates：If current iteration number of times is equal to setting maximum iteration time KmaxOr error essence
Degree is less than or equal to εpso, then iteration ends, and export result of calculation, i.e., the confession that wind power generation plant Jing electricity-heat converters are provided
Thermal power ηcPf, gas electricity generator generated output Pr, heat-storing device heating power HP, thermoelectricity unit provides to electric load
Electrical power Pbq, thermal power h that provides to thermic load of thermoelectricity unitbq, thermoelectricity unit the electrical power of electric accumulation of heat is carried out to heat-storing device
Pr.dWith thermoelectricity unit directly to thermal power h of heat-storing device accumulation of heatr.d, and limit computational accuracy εpsoAnd maximum iteration time
Kmax.If iterationses reach maximum and error precision is unsatisfactory for requiring, return second step and restart.
The flow chart for solving optimum particle position is as shown in Figure 3.
Claims (5)
1. the electric heating decoupled system in a kind of co-generation unit, it is characterised in that including gas electricity generator, thermoelectricity unit, wind
Power generation device, heat-storing device, electricity-heat converter, electric load and thermic load；
Described electric load, including lighting installation, household electrical appliance and industrial electricity apparatus；
Described thermic load, including industrial heat equipment and civil heating equipment；
Described gas electricity generator, Jing supply networks are joined directly together with electric load and connect；
Described wind power generation plant, is connected by electricity-heat converter Jing heat pipes with heat-storing device；
Described thermoelectricity unit, Jing supply networks are connected to electric load, and Jing heat supply networks are connected to thermic load, and Jing heat pipes are connected to heat accumulation
Device；
Described thermoelectricity unit, Jing supply networks are connected with electricity-heat converter, and electricity-heat converter Jing heat pipes are filled with heat accumulation
Put and be connected；
Described heat-storing device, Jing heat supply networks are joined directly together with thermic load and connect.
2. the control method of the electric heating decoupled system in a kind of co-generation unit according to claim 1, its feature exists
In comprising the following steps：
Step 1：Wind-powered electricity generation unit price, the cooler fuel price of thermoelectricity unit for determine the demand of thermic load, the demand of electric load, buying
Cooler fuel price with gas electricity generator, sell caloric value and sale of electricity valency；
Step 2：Determine thermoelectricity unit unit of fuel produce electricity and heat, the combustion gas of gas electricity generator unit produce electricity and
Unit quantity of electricity changes the heat for producing by electric heating；
Step 3：According to the demand and the demand of electric load of thermic load, sending out for thermoelectricity unit by PSO Algorithm
Electrical power and heating power, the heating power of heat-storing device, the generated output of gas electricity generator, and wind power generation plant and storage
The interactive power and thermoelectricity unit of thermal interacts power with heat-storing device, makes co-generation unit meet the equilibrium of supply and demand
Meanwhile, realize thermoelectricity decoupling；
Step 4：Co-generation unit reaches balance Jing after step 3, if there is fluctuation in thermic load and electric load, by heat-storing device and
Gas electricity generator is adjusted, scope of the adjustment cost less than steam power plant's setting.
3. the control method of the electric heating decoupled system in a kind of co-generation unit according to claim 1, its feature exists
In, the particle in particle cluster algorithm in described step 3, including the heat supply that wind power generation plant Jing electricity-heat converters are provided
Electrical power, heat that power, the generated output of gas electricity generator, the heating power of heat-storing device, thermoelectricity unit are provided to electric load
Thermal power that group of motors is provided to thermic load, thermoelectricity unit are direct to the electrical power and thermoelectricity unit that heat-storing device carries out electric accumulation of heat
To the thermal power of heat-storing device accumulation of heat.
4. the control method of the electric heating decoupled system in a kind of co-generation unit according to claim 1, its feature exists
In the fitness value in particle cluster algorithm in described step 3 is referred to co-generation unit operating cost as object function
Functional value.
5. the control method of the electric heating decoupled system in a kind of co-generation unit according to claim 1, its feature exists
In described step 4 is comprised the following steps：
Step 4.1：When adjustment cost is not less than set point, the change that thermal load demands and electrical load requirement are judged respectively becomes
Gesture；
If electrical load requirement increases, the generated output of gas electricity generator is improved；
If electrical load requirement is reduced, determine whether that gas electricity generator runs；If in the case of having gas electricity generator to run, drop
The generated output of low gas electricity generator；If in the case of running without gas electricity generator, the unnecessary electric energy that thermoelectricity unit is produced
Jing electric heating converter devices are converted into thermal energy storage to heat-storing device；
If thermal load demands increase, the heating power of heat-storing device is improved；
If thermal load demands are reduced, determine whether that heat-storing device runs；If in the case of having heat-storing device to run, reducing storage
The heating power of thermal；If in the case of running without heat-storing device, many waste heat energies that thermoelectricity unit is produced directly are stored
Into heat-storing device；
Step 4.2：If adjustment cost exceedes set point, return to step 3.
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