CN107895209A - Mix fuel unit power plant load fuel optimization distribution method and system - Google Patents
Mix fuel unit power plant load fuel optimization distribution method and system Download PDFInfo
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/04—Forecasting or optimisation specially adapted for administrative or management purposes, e.g. linear programming or "cutting stock problem"
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- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
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- G06Q10/0631—Resource planning, allocation, distributing or scheduling for enterprises or organisations
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The method and system of one specific admixture fuel machine group power plant load fuel optimization scheduling controlling, initially set up ioad fuel model of optimizing allocation, detection parameters of each generating set of power plant under different multifuel combustion proportioning states under different generating active power are surveyed afterwards, then the coal consumption characteristic surface of each generating set is calculated, the coal characteristic curved surface and online monitoring data of each generating set are finally substituted into ioad fuel model of optimizing allocation and obtain optimum proportion scheme, realizes that the net coal consumption rate of whole power plant is minimum so as to control to adjust the parameter of coal consumption large-sized unit；The present invention accuracy controlling can distribute each unit generation active power and the multifuel combustion amount of multifuel combustion fuel in time, so as to make power plant's net coal consumption rate in the case where reaching related request minimum, save fuel energy.
Description
Technical field
The present invention is a kind of technology for being related to Generation Control field, specifically a specific admixture fuel machine group power plant load fuel
The method and system of optimal dispatch control.
Background technology
The standard net coal consumption rate of power plant is relevant with the coal consumption characteristic of every unit.And total generating of the power plant in production run
Active power can need to be constantly occurring change according to electricity consumption, and the generating active power of every unit also constantly changes therewith,
And these changes can cause the coal consumption of every unit to change, and then influence the net coal consumption rate of whole power plant.
The content of the invention
The present invention is directed to deficiencies of the prior art, proposes a specific admixture fuel machine group power plant load fuel optimization
The method and system of scheduling controlling, the running status of each unit of accuracy controlling is capable of in power plant's running, more purposefully
Ground is controlled to whole power plant, so as to reduce the standard net coal consumption rate of whole power plant.
The present invention is achieved by the following technical solutions：
The present invention relates to the method for a specific admixture fuel machine group power plant load fuel optimization scheduling controlling, load is initially set up
Fuel optimization distribution model, each generating set of power plant different generating active power under different multifuel combustion proportioning states are surveyed afterwards
Under detection parameters, then calculate the coal consumption characteristic surface of each generating set, finally by the coal characteristic curved surface of each generating set and
Online monitoring data substitutes into ioad fuel model of optimizing allocation and obtains optimum proportion scheme, so as to control to adjust coal consumption large-sized unit
Parameter realizes that the net coal consumption rate of whole power plant is minimum.
Described generating set includes：Single-fuel generating set and two kinds of fuel mixed with power generation units.
According to the requirement of optimal power plant operation, the generating active power and fuel mixed combustion ratio of every unit of reasonable distribution, establish
With the ioad fuel model of optimizing allocation of the complete minimum target of factory's net coal consumption rate, that is, meet：
Wherein：F is full factory's net coal consumption rate, UiFor the state parameter of i-th unit, 0, which represents unit, is in stopped status, and 1 represents unit
It is in running order；FiFor the coal consumption amount of i-th unit, PiFor the generating active power of i-th unit, QiFor i-th unit
Multifuel combustion fuel multifuel combustion amount.
The constraints of described ioad fuel model of optimizing allocation includes：
1. power plants generating electricity active power constrains：Wherein：D is that power plant always generates electricity active power；
2. multifuel combustion fuel constrains：Wherein：G is multifuel combustion total amount of fuel；
3. every unit generation generating active power excursion constraint：Pi,min≤Pi≤Pi,max；
4. every unit multifuel combustion fuel change range constraint：Qi,min≤Qi≤Qi,max；
5. every unit generation active power maximum raising and lowering rate constraint：Wherein：viFor machine
Group generating active power maximum raising and lowering speed, Δ t are no more than the minimum interval T of unit generation schedule.
Described detection parameters include：The heat loss due to exhaust gas q of every unit2i, i-th unit fuel gas do not fire completely
Heat loss q3i, solid-unburning hot loss q4i, boiler radiation loss q5i, heat loss due to sensible heat in slag q6i, generated energy Ni、
Main steam flow L1i, reheated steam flow L2i, main steam enthalpy h0i, feedwater enthalpy hfwi, reheated steam hot junction enthalpy hzrii, reheated steam
Cold end enthalpy hzroi, superheater outlet enthalpy hgroi, Steam Turbine Through IP Admission steam admission enthalpy hzjii, the cold steam enthalpy h of reheating 1lzri, steam turbine it is low
Cylinder pressure exhaust enthalpy hpqi, generator power Pei, high pressure factory Variable power Papi, always generating active power D and multifuel combustion fuel are total for power plant
Measure G.
Described net coal consumption rate includes boiler efficiency ηbi, pipeline efficiency etapi, steam turbine internal efficiency ηti, mechanical efficiency ηmi, hair
Electric efficiency ηgiWith station service power consumption rate ξapi, therefore the net coal consumption rate available functions of unit represent：
Wherein：Boiler efficiency ηbi=1- (q2i+q3i+q4i+q5i+q6i), pipeline efficiencySteam turbine internal efficiencyMechanical efficiency ηmi=
0.985th, generator efficiency ηgi=0.99, station service power consumption rate
The coal consumption amount F of i-th described unitiIt is expressed as PiWith QiFunction, i.e. generating set coal consumption characteristic surface
For：Wherein：ai、bi、ci、di、ei、
fiFor coal consumption characteristic coefficient, if single-fuel unit then bi、ci、eiBe 0, i.e. the coal consumption characteristic of unit and fuel multifuel combustion amount
It is unrelated.
The consumption characteristic surface of described each unit can be calculated by the parameter monitored on-line, and it is excellent then to be substituted into ioad fuel
Change the optimal case that the distribution of power plant load fuel is calculated in distribution model.
Brief description of the drawings
Fig. 1 is schematic flow sheet of the present invention；
Fig. 2 is present system schematic diagram；
Power plant's coa consumption rate comparison diagram before and after Fig. 3 optimizations.
Embodiment
As shown in Fig. 2 the present embodiment is related to a specific admixture fuel machine group power plant load fuel optimization distribution system, including：
Monitor module, calculating distribute module and unit regulation and control module on-line, wherein：It is corresponding that on-line monitoring module monitors every unit in real time
Parameter and be sent to calculating distribute module；The data that distribute module receives on-line monitoring module transmission are calculated, calculate every hair
The coal consumption characteristic surface of group of motors, and distribute according to power plant's general power and multifuel combustion total amount of fuel the generating wattful power of every unit
The mixed combustion ratio of rate and fuel, unit allocation module is transferred to by allocation result；Unit regulation and control module then receives every machine component
The generating active power matched somebody with somebody and the mixed combustion of fuel compare every unit and adjusted accordingly.
The present embodiment applies said system to the power plant with different types of 5 generating sets, wherein：1st, 2
Unit is the generating set of single fire blast furnace gas, and the 3rd, 4,5 unit is the generating set based on blast furnace gas and natural gas,
Wherein：The installed capacity of 1st unit is that the installed capacity of the 2nd, 3,4,5 unit is 350MW outside 150MW.
As shown in figure 1, the method bag for mixing fuel unit power plant load fuel optimization scheduling controlling in this embodiment
Include following steps：
1) according to the requirement of optimal power plant operation, the generating active power and fuel mixed combustion ratio of every unit of reasonable distribution,
Establish with the ioad fuel model of optimizing allocation of the complete minimum target of factory's net coal consumption rate：
Wherein：F is full factory's net coal consumption rate, UiFor the state of i-th unit
Parameter, 0, which represents unit, is in stopped status, and 1 to represent unit in running order；FiFor the coal consumption amount of i-th unit, PiFor i-th
The generating active power of platform unit, QiFor the multifuel combustion fuel multifuel combustion amount of i-th unit.FiP can be expressed asiWith QiFunction, i.e.,
The coal consumption characteristic surface of generating set：
Wherein：ai、ai、bi、
ci、di、ei、fiFor coal consumption characteristic coefficient, if single-fuel unit then bi、ci、eiIt is 0, i.e., the coal consumption characteristic of unit is with firing
Expect that multifuel combustion amount is unrelated.
Described constraints is as follows：
1. power plants generating electricity active power constrains：Wherein D is that power plant always generates electricity active power, monitors number on-line
According to；
2. multifuel combustion fuel constrains：Wherein G is multifuel combustion total amount of fuel, online monitoring data；
3. every unit generation generating active power excursion constraint：Pi,min≤Pi≤Pi,max, P in this examplei,min=
60%PI, volume, Pi,max=PI, volume；
4. every unit multifuel combustion fuel change range constraint：Qi,min≤Qi≤Qi,max, Q in this examplei,min=0, Q1,max=
370kNm3/h, Q2,max=780kNm3/h, Q3,max=150kNm3/h, Q4,max=250kNm3/h, Q5,max=370kNm3/h；
5. every unit generation active power maximum raising and lowering rate constraint：Wherein viFor unit
Generating active power maximum raising and lowering speed, v in this example1=6MW/min, v2=v3=v4=v5=12MW/min, Δ t is not
More than the minimum interval T of unit generation schedule, T=15min in this example.
2) detection parameters of each unit are measured, and calculate the coal consumption characteristic surface of each generating set.
The coal consumption characteristic surface of the 1st described generating set isInstitute
The coal consumption characteristic surface for the 2nd generating set stated isDescribed the 3rd
The coal consumption characteristic surface of generating set is The coal consumption characteristic surface of the 4th described generating set The coal consumption characteristic surface of the 5th described generating set
3) optimal case of power plant load fuel distribution is calculated.
Described Power Plant state parameter Ui=1, power plant always generates electricity wattful power within the first unit generation schedule time
Rate D=1200MW, blast furnace gas multifuel combustion amount G=1300KNm3/h。
The generating active power of the 1st described unit is 117MW, blast furnace gas multifuel combustion amount 370KNm3/ h, coa consumption rate
352.2g/KWh。
The generating active power of the 2nd described unit is 266MW, blast furnace gas multifuel combustion amount 752KNm3/ h, coa consumption rate
314.2g/KWh。
The generating active power of the 3rd described unit is 225MW, blast furnace gas multifuel combustion amount 0KNm3/ h, coa consumption rate
324.5g/KWh。
The generating active power of the 4th described unit is 306MW, blast furnace gas multifuel combustion amount 0KNm3/ h, coa consumption rate
321.6g/KWh。
The generating active power of the 5th described unit is 287MW, blast furnace gas multifuel combustion amount 178KNm3/ h, coa consumption rate
336.6g/KWh。
4) all units of power plant are adjusted to the parameter distributed to reduce the net coal consumption rate of whole power plant.
Fortune of the module according to all units in the ioad fuel optimal scheme scheme regulation and control power plant of calculating is regulated and controled by unit
Row state, and kept within this unit generation schedule time.
Monitor power plant always generating active power D and blast furnace gas multifuel combustion amount G on-line, repeat above step and calculate next list
Power plant load fuel optimal scheme scheme in first generation schedule time.
The net coal consumption rate of power plant is as shown in Figure 3 before and after optimization.The average net coal consumption rate of power plant before optimizing in figure 3 in the time
For 330.5g/KWh, and average net coal consumption rate be 326.7g/KWh after optimizing, both compare, and is put down using power plant after prioritization scheme
Equal net coal consumption rate have dropped 3.8g/KWh, reach energy-saving purpose.
Compared with prior art, the present invention accuracy controlling can distribute each unit generation active power and blast furnace coal in time
The multifuel combustion amount of gas, so as to make power plant's net coal consumption rate in the case where reaching related request minimum, save fuel energy.
Above-mentioned specific implementation can by those skilled in the art on the premise of without departing substantially from the principle of the invention and objective with difference
Mode local directed complete set is carried out to it, protection scope of the present invention is defined by claims and not by above-mentioned specific implementation institute
Limit, each implementation in the range of it is by the constraint of the present invention.
Claims (5)
1. the method for a specific admixture fuel machine group power plant load fuel optimization scheduling controlling, it is characterised in that initially set up load
Fuel optimization distribution model, each generating set of power plant different generating active power under different multifuel combustion proportioning states are surveyed afterwards
Under detection parameters, then calculate the coal consumption characteristic surface of each generating set, finally by the coal characteristic curved surface of each generating set and
Online monitoring data substitutes into ioad fuel model of optimizing allocation and obtains optimum proportion scheme, so as to control to adjust coal consumption large-sized unit
Parameter realizes that the net coal consumption rate of whole power plant is minimum.；
Described generating set includes：Single-fuel generating set and two kinds of fuel mixed with power generation units；
Described ioad fuel model of optimizing allocation, with the complete minimum target of factory's net coal consumption rate, it is specially： Wherein：F is full factory's net coal consumption rate, UiUnit is represented for the state parameter of i-th unit, 0
In stopped status, 1 to represent unit in running order；FiFor the coal consumption amount of i-th unit, PiGenerating for i-th unit has
Work(power, QiFor the multifuel combustion fuel multifuel combustion amount of i-th unit；
The constraints of described ioad fuel model of optimizing allocation is as follows：
I. power plants generating electricity active power constrains：Wherein：D is that power plant always generates electricity active power；
Ii. multifuel combustion fuel constrains：Wherein：G is multifuel combustion total amount of fuel；
Iii. every unit generation generating active power excursion constraint：Pi,min≤Pi≤Pi,max；
Iv. every unit multifuel combustion fuel change range constraint：Qi,min≤Qi≤Qi,max；
V. every unit generation active power maximum raising and lowering rate constraint：Wherein：Vi sends out for unit
Electric active power maximum raising and lowering speed, Δ t are no more than the minimum interval T of unit generation schedule；
The coal consumption characteristic surface of described generating set, i.e., the coal consumption amount F of i-th unitiIt is expressed as PiWith QiFunction be：Wherein：ai、bi、ci、di、ei、fi
For coal consumption characteristic coefficient, if single-fuel unit then bi、ci、eiBe 0, i.e., the coal consumption characteristic of unit and fuel multifuel combustion amount without
Close.
2. according to the method for claim 1, it is characterized in that, described detection parameters include：The exhaust gas heat loss of every unit
Lose q2i, i-th unit the imperfect combustion heat loss q of fuel gas3i, solid-unburning hot loss q4i, boiler radiating damage
Lose q5i, heat loss due to sensible heat in slag q6i, generated energy Ni, main steam flow L1i, reheated steam flow L2i, main steam enthalpy h0i, feedwater enthalpy
hfwi, reheated steam hot junction enthalpy hzrii, reheated steam cold end enthalpy hzroi, superheater outlet enthalpy hgroi, Steam Turbine Through IP Admission steam admission enthalpy
hzjii, the cold steam enthalpy h of reheating 1lzri, exhaust enthalpy of low pressure cylinder of steam turbine hpqi, generator power Pei, high pressure factory Variable power Papi、
The total generating active power D and multifuel combustion total amount of fuel G of power plant.
3. according to the method for claim 1, it is characterized in that, described net coal consumption rate includes boiler efficiency ηbi, pipeline efficiency
ηpi, steam turbine internal efficiency ηti, mechanical efficiency ηmi, generator efficiency ηgiWith station service power consumption rate ξapi, therefore the net coal consumption rate of unit can
Use function representation：
Wherein：Boiler efficiency ηbi=1- (q2i+q3i+q4i+q5i+q6i), pipeline efficiencySteam turbine internal efficiencyMechanical efficiency ηmi=
0.985th, generator efficiency ηgi=0.99, station service power consumption rate
According to the method for claim 3,4. it is characterized in that, the coal consumption characteristic surface of described each unit is by monitoring on-line
Parameter calculates, and is then substituted into the optimal case that the distribution of power plant load fuel is calculated in ioad fuel model of optimizing allocation.
A kind of 5. system for realizing any of the above-described claim methods described, it is characterised in that including：Monitor module, meter on-line
Distribute module and unit regulation and control module are calculated, wherein：On-line monitoring module monitors the corresponding parameter of every unit and is sent in real time
Calculate distribute module；The data that distribute module receives on-line monitoring module transmission are calculated, the coal consumption for calculating every generating set is special
Property curved surface, and according to power plant's general power and multifuel combustion total amount of fuel distribute every unit generating active power and fuel it is mixed
Ratio is fired, allocation result is transferred to unit allocation module；Unit regulation and control module then receives the generating wattful power of every unit commitment
The mixed combustion of rate and fuel compares every unit and adjusted accordingly.
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Application publication date: 20180410 |