CN110429662A - A kind of cogeneration units unit commitment formulating method and system - Google Patents
A kind of cogeneration units unit commitment formulating method and system Download PDFInfo
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- CN110429662A CN110429662A CN201910583801.8A CN201910583801A CN110429662A CN 110429662 A CN110429662 A CN 110429662A CN 201910583801 A CN201910583801 A CN 201910583801A CN 110429662 A CN110429662 A CN 110429662A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
A kind of cogeneration units unit commitment formulating method and system, comprising: when there are abandonment: the maximum heating load of the output power condition calculating cogeneration units based on cogeneration units；The available heating load of cogeneration units is determined based on the maximum heating load；The plan for start-up and shut-down of cogeneration units is determined based on the heat load prediction curve of the available heating load and acquisition, it is a kind of Unit Combination formulation new model for improving wind electricity digestion capability, meet practical combined heat and power dispatching requirement, and the space of wind electricity digestion is further improved under the premise of ensureing heat demand, heat load prediction is made full use of, can further improve the utilization rate of wind-powered electricity generation.
Description
Technical field
The present invention relates to field of power systems, and in particular to a kind of cogeneration units unit commitment formulating method and is
System.
Background technique
Currently, new energy installation scale ranks first in the world.But by factors such as power supply architecture, resource distribution and electric network compositions
Influence, new energy consumption problem protrude year by year.Wind-power electricity generation has the characteristics that randomness, fluctuation and intermittence, and wind-powered electricity generation disappears
It receives and is directly affected by the regulating power of normal power supplies, wind power output fluctuation range will lead to abandoning when exceeding power grid regulating power
Wind.Some regional fired power generating unit especially cogeneration units account for relatively high, and in winter under the demand of heat supply, city heat supply network is main
By large-scale thermoelectricity unit central heating, under " electricity determining by heat " operational mode, cogeneration units peak modulation capacity is significantly reduced,
Guarantee the active balance of heat supply and power grid in the load valley period, it has to which a large amount of abandonments drastically influence connecing for wind-powered electricity generation
It receives.In conventional electric power Unit Combination, to fully ensure that resident's heat supply, cogeneration units need to formulate thermoelectricity in strict accordance with regulation
The unit commitment of coproduction unit and minimum service capacity, the result one of this cogeneration units unit commitment formulating method
As it is too conservative, booting number of units and the minimum service capacity that will lead to the Winter heat supply phase are excessive, reduce the consumption space of wind-powered electricity generation, unfavorable
In the promotion of wind power utilization.
Summary of the invention
Above-mentioned insufficient in the presence of the prior art in order to solve the problems, such as, the present invention provides a kind of cogeneration units start and stop
Machine ways to draw up the plan and system.
Present invention provide the technical scheme that
A kind of cogeneration units unit commitment formulating method, which comprises
When there are abandonment: the maximum heat supply of the output power condition calculating cogeneration units based on cogeneration units
Amount；
The available heating load of cogeneration units is determined based on the maximum heating load；
The start and stop meter of cogeneration units is determined based on the heat load prediction curve of the available heating load and acquisition
It draws.
It is preferably, described that the available heating load of cogeneration units is determined based on the maximum heating load, comprising:
The range of safety margin is determined according to the power of cogeneration units；
The model of the available heating load of cogeneration units is determined according to the range of the safety margin and maximum heating load
It encloses；
Wherein, the safety margin is 10%-30%.
Preferably, the calculating formula of the available heating load of the cogeneration units is as follows:
In formula, PIt canFor the available heating load of cogeneration units；Ph,i,maxIt is supplied for every the maximum of cogeneration units
Heat；HL,tFor heat load prediction curve；η is safety margin.
Preferably, the calculating formula of the maximum heating load of the cogeneration units is as follows:
Pb,h,max=(Pb,e,max-Kb)/cm
Pc,h,max=(Pc,e,max-Kc)/(cm+cv1)
In formula, Pb,h,maxFor the maximum heating load of back pressure type cogeneration units；Pb,e,maxCogeneration of heat and power when for back pressure operating condition
Unit maximum output power；Pc,h,maxFor the maximum heating load of steam-extracting type cogeneration units；Pc,e,maxTo coagulate heat when gas operating condition
Electricity Federation produces unit maximum output power；Kb,KcFor coupling constant；cmFor back pressure operating condition coupled thermomechanics coefficient；cv1For steam-extracting type unit
The electro thermal coupling coefficient of maximum output power operating condition；.
Preferably, the heat load prediction curve based on the heating load and acquisition determines the start and stop of cogeneration units
Plan, comprising:
Cogeneration units are calculated based on the available heating load of cogeneration units and the heat load prediction curve of acquisition
Minimum operation number of units；
The current operation number of units is compared with the minimum operation number of units, determines that current operation number of units needs to shut down
Or the number of units of booting；
The plan for start-up and shut-down of cogeneration units is formulated based on the number of units for needing to shut down or be switched on.
Preferably, the calculating formula of the minimum operation number of units is as follows:
In formula, I is the operation number of units of cogeneration units；η is safety margin；Ph,i,maxFor every cogeneration units
Maximum heating load；Pc,e,maxTo coagulate cogeneration units maximum output power when gas operating condition；Kb,KcFor coupling constant；cmFor back
Press operating condition coupled thermomechanics coefficient；cv1For the electro thermal coupling coefficient of steam-extracting type unit maximum output power operating condition；HL,tIt is pre- for thermic load
Survey curve；IbFor the operation number of units of back pressure type cogeneration units；IcFor the operation number of units of steam-extracting type cogeneration units.
Preferably, the plan for start-up and shut-down for formulating cogeneration units, further includes:
If the plan for start-up and shut-down meets heat demand, the plan for start-up and shut-down is issued to steam power plant and is executed；
Otherwise, abandonment is recalculated, and the output power condition calculating cogeneration units based on cogeneration units
Maximum heating load；
The available heating load of cogeneration units is determined based on the maximum heating load；
The start and stop meter of cogeneration units is determined based on the heat load prediction curve of the available heating load and acquisition
It draws；
Until the plan for start-up and shut-down meets heat demand, and the plan for start-up and shut-down for meeting heat demand is issued to thermoelectricity
Factory executes.
Preferably, the calculating of the abandonment, comprising:
Obtain heat load prediction curve and wind power；
It is switched on and is planned based on conventional power generation unit, obtain the whole network minimum technology power output；
Based on the heat load prediction curve and sends interconnection outside and trade to obtain the whole network generation load in predicted time section；
The difference for calculating the whole network generation load and the whole network minimum technology power output, obtains wind electricity digestion space；
Abandonment is calculated based on the wind power and wind electricity digestion space.
A kind of cogeneration units unit commitment formulation system, the system comprises:
First computing module: for when there are abandonment: the output power condition calculating thermoelectricity based on cogeneration units
The maximum heating load of coproduction unit；
Second computing module: for determining the available heating load of cogeneration units based on the maximum heating load；
Determining module: for determining cogeneration of heat and power based on the heat load prediction curve of the available heating load and acquisition
The plan for start-up and shut-down of unit.
Preferably, the computing module, comprising: computing unit, determination unit and formulation unit；
The computing unit calculates cogeneration units most for the heat load prediction curve based on heating load and acquisition
Small operation number of units；
The determination unit, for the current operation number of units to be compared with the minimum operation number of units, determination is worked as
The number of units that preceding operation number of units needs to shut down or be switched on；
The formulation unit, for formulating the start and stop of cogeneration units based on the number of units for needing to shut down or be switched on
Plan.
Compared with prior art, the invention has the benefit that
Technical solution provided by the invention, comprising: when there are abandonment: the output power operating condition based on cogeneration units
Calculate the maximum heating load of cogeneration units；The available heat supply of cogeneration units is determined based on the maximum heating load
Amount；The plan for start-up and shut-down of cogeneration units is determined based on the heat load prediction curve of the available heating load and acquisition,
It is a kind of Unit Combination formulation new model for improving wind electricity digestion capability, meets practical combined heat and power dispatching requirement, and ensureing
The space of wind electricity digestion is further improved under the premise of heat demand, makes full use of heat load prediction, can further improve wind
The utilization rate of electricity.
Detailed description of the invention
Fig. 1 is overall step flow chart of the invention；
Fig. 2 is that thermoelectricity unit plan for start-up and shut-down of the invention formulates flow chart.
Specific embodiment
For a better understanding of the present invention, the contents of the present invention are done further with example with reference to the accompanying drawings of the specification
Explanation.
Embodiment 1:
It is an object of the present invention to the shortcoming to overcome prior art, propose a kind of for thermo-electrically combined dispatching
Cogeneration units unit commitment formulating method is as shown in Figure 2.
For this method first according to following one week heat load prediction data, the maximum heat supply assessed in steam power plant's heating range is negative
Lotus is then based on cogeneration units heat capacity and determines the unit commitment for meeting the cogeneration units of heat demand.This
Invention determines that cogeneration units minimum runs number of units by the prediction using steam power plant's maximum heat demand, is a kind of raising wind
The Unit Combination of electric digestion capability formulates new model, meets practical thermo-electrically combined dispatching demand, and before ensureing heat demand
It puts and further improves the space of wind electricity digestion.
As shown in Figure 1, the specific steps are as follows:
Step 1: when there are abandonment: the output power condition calculating cogeneration units based on cogeneration units
Maximum heating load；
Step 2: the available heating load of cogeneration units is determined based on the maximum heating load；
Step 3: cogeneration units are determined based on the heat load prediction curve of the available heating load and acquisition
Plan for start-up and shut-down.
This method considers the heat load prediction in one week following, and thermoelectricity connection is formulated under the premise of ensureing heat demand
The start-up mode for producing unit, improves the utilization rate of wind-powered electricity generation.
Wherein, step 1: when there are abandonment: the output power condition calculating cogeneration of heat and power machine based on cogeneration units
The maximum heating load of group, comprising:
Step 1-1: planned based on the conventional power generation unit booting in one week following, including thermoelectricity, water power, nuclear power etc. are all kinds of
Generating set obtains the whole network minimum technology power curve a few days ago by each unit minimum technology power output that add up constantly.
Step 1-2: according in following one week load prediction, send interconnection trading program outside, it is cumulative obtain it is one week following
Interior the whole network generation load, the difference between generation load and minimum technology power output, as wind electricity digestion space.
Step 1-3: wind power prediction and wind electricity digestion space in comparison is one week following receive spatial portion beyond wind-powered electricity generation
Point wind power prediction regard as that there are abandonments.
Step 1-4: whether there is abandonment in judgement is one week following, if there are abandonments in one week following, execute step 1-
5, abandonment if it does not exist, the then Unit Combination for not carrying out thermo-electrically combined dispatching is formulated, this process terminates.
Step 1-5: according to heat load prediction system to the heat load prediction in one week future, following one week steam power plant is assessed
Heat load prediction curve H in heating rangeL,t；
Step 1-6: it according to the operation characteristic of steam power plant's cogeneration units, calculates the maximum of every cogeneration units and supplies
Thermal energy power；
Cogeneration units mainly want back pressure type and steam-extracting type two major classes, and moving model is mainly as follows:
Pb,e=cmPb,h+Kb (1)
max{Pc,e,min-cv2Pc,h,cmPc,h+Kc}≤Pc,e≤Pc,e,max-cv1Pc,h (2)
Pb,e,Pb,h,Pc,e,Pc,hThe power supply of back pressure type thermoelectricity unit, heating power respectively, cmFor back pressure operating condition coupled thermomechanics
Coefficient, cv1,cv2The electro thermal coupling coefficient of steam-extracting type unit minimax output power operating condition, Kb,KcFor coupling constant,
Pc,e,min,Pc,e,maxTo coagulate minimum when gas operating condition, maximum output power.
Thermo-electrically coproduction unit generation Power operation is in minimum output power PminWith maximum output power PmaxBetween, it is maximum
Power output be generally fired power generating unit installed capacity, according to formula (1) and formula (2) it is found that
The maximum of back pressure type cogeneration units is P for calorific valueb,h,max=(Pb,e,max-Kb)/cm；
The maximum of steam-extracting type cogeneration units is P for calorific valuec,h,max=(Pc,e,max-Kc)/(cm+cv1)；
Step 2: the available heating load of cogeneration units is determined based on the maximum heating load；
Based on heat supply security consideration, cogeneration units heating power considers that certain safety margin η is (general desirable
10%-30%), meeting centainly need to meet following formula for the cogeneration units heating power of thermal safety margin:
In formula, PIt canFor the available heating load of cogeneration units；Ph,i,tFor heat load prediction curve every heat in the same time
The heating load of Electricity Federation production unit.
Step 3: cogeneration units are determined based on the heat load prediction curve of the available heating load and acquisition
Plan for start-up and shut-down, comprising:
Step 3-1: it in conjunction with cogeneration units maximum heat capacity and for thermal safety margin, is calculated as follows and meets future
The minimum operation number of units of thermal load demands cogeneration units in one week:
Step 3-2: according to current steam power plant's cogeneration units operating status, judge current cogeneration units operation platform
Whether number is greater than minimum operation number of units, if current cogeneration units operation number of units is greater than minimum operation number of units, provides shutdown platform
Number is suggested；If current cogeneration units operation number of units is less than minimum operation number of units, provides booting and suggest；If current cogeneration of heat and power
Unit runs number of units and is equal to minimum operation number of units, then keeps original unit operational plan constant；
Step 3-3: the start and stop suggestion based on steam power plant's cogeneration units judges cogeneration units booting/shutdown
Whether thermal power unit operation maximum/minimum power output meets workload demand afterwards, if satisfied, then executing steam power plant's Unit Commitment machine meter
It draws, suggests if not satisfied, providing the adjustment of steam power plant's unit commitment；
Step 3-4: based on step 3-3 as a result, formulating the unit commitment of steam power plant's cogeneration units, and it is issued to heat
Power plant executes.
Embodiment 2:
Based on unified design invention, the present invention also provides a kind of cogeneration units unit commitments to formulate system, described
System includes:
First computing module: for when there are abandonment: the output power condition calculating thermoelectricity based on cogeneration units
The maximum heating load of coproduction unit；
Second computing module: for determining the available heating load of cogeneration units based on the maximum heating load；
Determining module: for determining cogeneration of heat and power based on the heat load prediction curve of the available heating load and acquisition
The plan for start-up and shut-down of unit.
The computing module, comprising: computing unit, determination unit and formulation unit；
The computing unit calculates cogeneration units most for the heat load prediction curve based on heating load and acquisition
Small operation number of units；
The determination unit, for the current operation number of units to be compared with the minimum operation number of units, determination is worked as
The number of units that preceding operation number of units needs to shut down or be switched on；
The formulation unit, for formulating the start and stop of cogeneration units based on the number of units for needing to shut down or be switched on
Plan.
It should be understood by those skilled in the art that, embodiments herein can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process of equipment (system) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
The above is only the embodiment of the present invention, are not intended to restrict the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent substitution, improvement and etc. done, be all contained in apply pending scope of the presently claimed invention it
It is interior.
Claims (10)
1. a kind of cogeneration units unit commitment formulating method, which is characterized in that the described method includes:
When there are abandonment: the maximum heating load of the output power condition calculating cogeneration units based on cogeneration units；
The available heating load of cogeneration units is determined based on the maximum heating load；
The plan for start-up and shut-down of cogeneration units is determined based on the heat load prediction curve of the available heating load and acquisition.
2. method as described in claim 1, which is characterized in that described to determine that cogeneration units based on the maximum heating load
The heating load of offer, comprising:
The range of safety margin is determined according to the power of cogeneration units；
The range of the available heating load of cogeneration units is determined according to the range of the safety margin and maximum heating load；
Wherein, the safety margin is 10%-30%.
3. method as claimed in claim 2, which is characterized in that the calculating formula of the available heating load of cogeneration units is such as
Under:
In formula, PIt canFor the available heating load of cogeneration units；Ph,i,maxFor the maximum heating load of every cogeneration units；
HL,tFor heat load prediction curve；η is safety margin.
4. method as described in claim 1, which is characterized in that the calculating formula of the maximum heating load of the cogeneration units is such as
Under:
Pb,h,max=(Pb,e,max-Kb)/cm
Pc,h,max=(Pc,e,max-Kc)/(cm+cv1)
In formula, Pb,h,maxFor the maximum heating load of back pressure type cogeneration units；Pb,e,maxCogeneration units when for back pressure operating condition
Maximum output power；Pc,h,maxFor the maximum heating load of steam-extracting type cogeneration units；Pc,e,maxTo coagulate thermoelectricity connection when gas operating condition
Produce unit maximum output power；Kb,KcFor coupling constant；cmFor back pressure operating condition coupled thermomechanics coefficient；cv1It is maximum for steam-extracting type unit
The electro thermal coupling coefficient of output power operating condition.
5. method as described in claim 1, which is characterized in that the heat load prediction curve based on the heating load and acquisition
Determine the plan for start-up and shut-down of cogeneration units, comprising:
Cogeneration units are calculated most based on the available heating load of cogeneration units and the heat load prediction curve of acquisition
Small operation number of units；
The current operation number of units is compared with the minimum operation number of units, determines that current operation number of units needs to shut down or open
The number of units of machine；
The plan for start-up and shut-down of cogeneration units is formulated based on the number of units for needing to shut down or be switched on.
6. method as claimed in claim 5, which is characterized in that the calculating formula of the minimum operation number of units is as follows:
In formula, I is the operation number of units of cogeneration units；η is safety margin；Ph,i,maxFor the maximum of every cogeneration units
Heating load；Pc,e,maxTo coagulate cogeneration units maximum output power when gas operating condition；Kb,KcFor coupling constant；cmFor back pressure work
Condition coupled thermomechanics coefficient；cv1For the electro thermal coupling coefficient of steam-extracting type unit maximum output power operating condition；HL,tFor heat load prediction song
Line；IbFor the operation number of units of back pressure type cogeneration units；IcFor the operation number of units of steam-extracting type cogeneration units.
7. method as described in claim 1, which is characterized in that the plan for start-up and shut-down for formulating cogeneration units, further includes:
If the plan for start-up and shut-down meets heat demand, the plan for start-up and shut-down is issued to steam power plant and is executed；
Otherwise, abandonment is recalculated, and the maximum of the output power condition calculating cogeneration units based on cogeneration units
Heating load；
The available heating load of cogeneration units is determined based on the maximum heating load；
The plan for start-up and shut-down of cogeneration units is determined based on the heat load prediction curve of the available heating load and acquisition；
Until the plan for start-up and shut-down meets heat demand, and the plan for start-up and shut-down for meeting heat demand is issued to steam power plant and is held
Row.
8. method as described in claim 1, which is characterized in that the calculating of the abandonment, comprising:
Obtain heat load prediction curve and wind power；
It is switched on and is planned based on conventional power generation unit, obtain the whole network minimum technology power output；
Based on the heat load prediction curve and sends interconnection outside and trade to obtain the whole network generation load in predicted time section；
The difference for calculating the whole network generation load and the whole network minimum technology power output, obtains wind electricity digestion space；
Abandonment is calculated based on the wind power and wind electricity digestion space.
9. a kind of cogeneration units unit commitment formulates system, which is characterized in that the system comprises:
First computing module: for when there are abandonment: the output power condition calculating cogeneration of heat and power based on cogeneration units
The maximum heating load of unit；
Second computing module: for determining the available heating load of cogeneration units based on the maximum heating load；
Determining module: for determining cogeneration units based on the heat load prediction curve of the available heating load and acquisition
Plan for start-up and shut-down.
10. systems approach as claimed in claim 8, which is characterized in that the computing module, comprising: computing unit, determination unit and
Formulate unit；
The computing unit calculates the minimum fortune of cogeneration units for the heat load prediction curve based on heating load and acquisition
Row number of units；
The determination unit determines current fortune for the current operation number of units to be compared with the minimum operation number of units
Row number of units needs the number of units shut down or be switched on；
The formulation unit, for formulating the plan for start-up and shut-down of cogeneration units based on the number of units for needing to shut down or be switched on.
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