CN113217131A - Electric heating load scheduling method of multi-energy complementary cogeneration system based on carbon emission reduction - Google Patents

Electric heating load scheduling method of multi-energy complementary cogeneration system based on carbon emission reduction Download PDF

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CN113217131A
CN113217131A CN202110294230.3A CN202110294230A CN113217131A CN 113217131 A CN113217131 A CN 113217131A CN 202110294230 A CN202110294230 A CN 202110294230A CN 113217131 A CN113217131 A CN 113217131A
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heat
load
electric
power
heat supply
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CN113217131B (en
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高新勇
郑立军
方昕玥
孙勇
李成磊
李宝聚
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State Grid Jilin Electric Power Corp
Huadian Electric Power Research Institute Co Ltd
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State Grid Jilin Electric Power Corp
Huadian Electric Power Research Institute Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01K13/00—General layout or general methods of operation of complete plants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
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    • F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • F03D9/255—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor
    • F03D9/257—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor the wind motor being part of a wind farm
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Abstract

The invention discloses an electric heating load scheduling method of a multi-energy complementary combined heat and power system based on carbon emission reduction, belonging to the technical field of combined heat and power generation, wherein the multi-energy complementary combined heat and power system comprises a thermal power plant, a wind power plant, a photovoltaic power plant and an electric heat storage thermal power station; the cogeneration unit is provided with a waste heat recovery heat supply device and a unit steam extraction heat supply device, the wind power plant and the photovoltaic power station are both provided with electric heat storage heat supply devices, and carbon emission factors under different heat supply and power generation working conditions and an electric heat load scheduling method based on carbon emission reduction are determined. The invention takes the minimum carbon emission total of the whole system as a constraint condition, and formulates an electric heating load scheduling method, thereby ensuring that the carbon emission total of the multi-energy complementary heating system can be minimized under the condition of meeting any energy supply requirement, being very beneficial to realizing the national carbon neutralization target and having obvious application value.

Description

Electric heating load scheduling method of multi-energy complementary cogeneration system based on carbon emission reduction
Technical Field
The invention relates to the technical field of cogeneration, in particular to an electric heating load scheduling method of a multi-energy complementary cogeneration system based on carbon emission reduction.
Background
At present, 17.9 hundred million tons of coal are consumed in electric power and thermal power production, which accounts for 66 percent of the total coal consumption and is the first energy utilization field of large coal consumption in China. The energy of the electric power and thermal production industry is efficiently and cleanly utilized, and especially the energy utilization mode of cogeneration is developed, so that the method is of great importance for implementing energy conservation and consumption reduction in the whole society, relieving energy bottleneck constraint and well harnessing haze and fighting. Particularly, the development targets of 'carbon peak reaching' and 'carbon neutralization' are proposed in the face of China, a healthy green low-carbon cycle development economic system is established, the economic society is promoted to develop comprehensive green transformation, and the method is a strategy for solving the resource environment ecological problem in China. Particularly, the low-carbon development of the electric power and heat power production industry is promoted, and the aim of 'carbon neutralization' is realized in the early days of China.
With the rapid advance of national energy transformation, a multi-energy complementary heating system with a cogeneration unit bearing a basic heat load and other energy bearing a peak heat load has been formed. However, the carbon emission factors generated by different heating modes and different working conditions of different power generation modes and the same power generation mode are different. Therefore, aiming at the multi-energy complementary heating system with multi-energy combination and multi-energy coupling, how to minimize the carbon emission of the multi-energy complementary heating system on the premise of meeting different energy supply requirements is a key technical problem which is urgently needed to be solved at present.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the electric heating load scheduling method of the multi-energy complementary cogeneration system based on carbon emission reduction, which has reasonable design and reliable performance.
The technical scheme adopted by the invention for solving the problems is as follows: an electric heating load scheduling method of a multi-energy complementary combined heat and power system based on carbon emission reduction is characterized in that the multi-energy complementary combined heat and power system comprises a thermal power plant, a wind power plant, a photovoltaic power plant and an electric heat storage thermal power station; the thermal power plant is provided with a cogeneration unit, the electricity produced by the cogeneration unit is externally supplied to an electric network, the cogeneration unit is simultaneously connected with a waste heat recovery and heat supply device and a unit steam extraction and heat supply device, and the heat produced by the waste heat recovery and heat supply device and the unit steam extraction and heat supply device is externally supplied to the heat network; the wind power plant is provided with a wind generating set, the electric power generated by the wind generating set is externally supplied to a power grid, the wind generating set is connected with an electric heat storage and supply device, and the heat generated by the electric heat storage and supply device is externally supplied to a heat supply network; the photovoltaic power station is provided with a photovoltaic generator set, the electric power produced by the photovoltaic generator set is externally supplied to a power grid, the photovoltaic generator set is connected with an electric heat storage and supply device, and the heat produced by the electric heat storage and supply device is externally supplied to a heat supply network; the electric heat storage and supply device generates heat by utilizing electric power provided by a power grid and supplies the heat to a heat supply network through the outside of the heating heat station;
the electric heating load scheduling method comprises the following steps:
combining different heat supply modes of a thermal power plant to obtain a power supply coal consumption calculation model of a cogeneration unit under a certain main steam admission operation working condition as a formula (1):
Wr＝Wr0-f01(Qh)-f02(Qd) (1)
in the formula: wr0The unit is kg/kWh, and the pure condensing operation power supply coal consumption value under the working condition is obtained by inquiring a database consisting of power supply coal consumption corresponding to the historical different pure condensing working conditions of the cogeneration unit;
f01(Qh) Refers to the external heat supply load Q of the waste heat recovery heat supply devicehThe calculation formula of the power supply coal consumption reduction value of the cogeneration unit is
Figure BDA0002983700730000021
Wherein: prFor the power supply load, x, of the cogeneration unit under the current heating conditions1The constant is a proportionality constant, which is a coal saving value generated in the power supply process of the cogeneration unit by the unit heat supply load of the waste heat recovery heat supply device;
f02(Qd) Refers to the external heat supply load Q of the steam extraction and heat supply device of the unitdThe calculation formula of the power supply coal consumption reduction value of the cogeneration unit is
Figure BDA0002983700730000022
Wherein: prFor the power supply load, x, of the cogeneration unit under the current heating conditions2The constant is a proportionality constant, which is a coal saving value generated in the power supply process of the cogeneration unit due to the unit heat supply load of the steam extraction and heat supply device of the unit;
therefore, a carbon emission factor calculation model of the cogeneration unit under a certain main steam admission operation condition is obtained as a formula (2):
βr＝Wr×ρsign board (2)
In the formula: rhoSign boardCarbon emission coefficient of standard coal, in kgCO2/kgce；
And (II) combining different heat supply modes of the thermal power plant to obtain a carbon emission factor calculation method of different heat supply modes as follows:
the carbon emission factor calculation model of the waste heat recovery heating device during external heat supply is formula (3):
ηh＝Wh×ρsign board (3)
In the formula: whThe unit of the corresponding heat supply coal consumption is kg/GJ when the waste heat recovery heating device supplies heat to the outside, and the coal consumption converted from the energy consumption of the waste heat recovery heating device and the supplied heat are calculated to obtain the coal consumption; rhoSign boardCarbon emission coefficient of standard coal, in kgCO2/kgce；
The carbon emission factor calculation model of the unit steam extraction and heat supply device during external heat supply is formula (4):
ηd＝Wd×ρsign board (4)
In the formula: wdThe unit steam extraction heat supply device is used for supplying heat to the outside, the unit is kg/GJ, and the unit is obtained by calculating the coal consumption converted from the energy consumption of the unit steam extraction heat supply device and the supplied heat; rhoSign boardCarbon emission coefficient of standard coal, in kgCO2/kgce；
And (III) determining the area where the multi-energy complementary cogeneration system is located, and then acquiring the latest numerical value of the average carbon emission factor gamma of the regional power grid through query, wherein the unit of the latest numerical value is kgCO2/kWh；
Therefore, the emission reduction benefits generated by the photovoltaic power station and the wind power plant when power is supplied once are the carbon emission quantity value gamma of the regional power grid at each degree of level, and the unit is kgCO2/kWh；
The carbon emission factors of the photovoltaic power station, the wind power plant and the electric heat storage thermal power station during external heat supply are the latest average carbon emission factors of the regional power gridGamma was calculated and is equal to 0.0036 x gamma, in kgCO2/GJ；
(IV) the power supply load calculation model of the cogeneration unit under a certain main steam admission operation condition is as shown in the formula (5):
Pr＝Pr0-f11(Qh)-f12(Qd) (5)
in the formula: pr0The method comprises the steps that a heat and power cogeneration unit operates corresponding power supply loads in pure condensation under the main steam inflow operation condition, and the pure condensation operation power supply loads under the operation condition are obtained by inquiring a database consisting of the power supply loads corresponding to the operation of the heat and power cogeneration unit under different historical pure condensation operation conditions;
f11(Qh) Refers to the external heat supply load Q of the waste heat recovery heat supply devicehSo that the power supply load of the cogeneration unit is reduced by the calculation formula f11(Qh)＝y1×QhWherein: y is1The waste heat recovery heat supply unit is a proportionality constant, which means that the unit heat supply load of the waste heat recovery heat supply unit reduces the power supply load of the cogeneration unit;
f12(Qd) Refers to the external heat supply load Q of the steam extraction and heat supply device of the unitdSo that the power supply load of the cogeneration unit is reduced by the calculation formula f11(Qd)＝y2×QdWherein: y is2The constant is a proportionality constant, which means that the unit heat supply load of the steam extraction and heat supply device of the unit reduces the power supply load of the cogeneration unit;
(V) at the current moment, acquiring an electric load predicted value F of the next moment when the power grid can be connected to the Internet1 DPredicted value of heat load required by heat supply network
Figure BDA0002983700730000041
Electric load predicted value F available from wind power plantFElectric load predicted value F that photovoltaic power plant can supplyGAnd the electric heating load relational expression of the wind power plant is a formula (6), and the electric heating load relational expression of the photovoltaic power station is a formula (7):
Figure BDA0002983700730000042
Figure BDA0002983700730000043
in the formula: f1 FIs the on-grid electrical load of the wind farm,
Figure BDA0002983700730000044
for heating loads in wind farms, F1 GIs the on-line electric load of the photovoltaic power station,
Figure BDA0002983700730000045
providing a heating load for the photovoltaic power station;
(VI) electric load F capable of accessing the network according to the electric network1 DHeat supply load of electric heat storage heating station
Figure BDA0002983700730000046
Grid-connected electrical load F of wind farm1 FAnd heat supply load
Figure BDA0002983700730000047
On-grid electrical load F of photovoltaic power station1 GAnd heat supply load
Figure BDA0002983700730000048
Determining the power supply load of the cogeneration unit which can be connected to the network and recording the power supply load as PrElectrical load in kWh and thermal load in GJ, P in this caserThe calculation method is formula (8):
Figure BDA0002983700730000049
heat load required by heat supply network
Figure BDA00029837007300000410
Electric heat storage heating stationHeating load of
Figure BDA00029837007300000411
Heating load of wind farm
Figure BDA00029837007300000412
Heating load of photovoltaic power station
Figure BDA00029837007300000413
Heat supply load Q of cogeneration unithAnd QdTo satisfy, the relationship is calculated as equation (9):
Figure BDA00029837007300000414
(VII) performing low-carbon scheduling on the electric heating load by formulating an electric heating load constraint relation based on carbon emission reduction, wherein the specific contents comprise:
firstly, the carbon emission C of power supply of the multi-energy complementary cogeneration system is determinedElectric powerCalculation model of (2) and amount of carbon emission C of heat supplyHeat generationThe calculation model of (2) is formula (10) and formula (11), respectively:
Celectric power＝βr×Pr-γ×F1 F-γ×F1 G (10)
Figure BDA00029837007300000415
Second, according to ηh、ηdAnd the size relation of 0.0036 multiplied by gamma, and the electric heating load distribution scheduling of the multi-energy complementary combined heat and power system is carried out through iterative computation, and the specific contents comprise:
when etah＜ηd< 0.0036 × γ:
the first step, determining boundary conditions before iterative computation, includes: the electric heat storage heating station does not supply heat to the outside;
second step, supplying all the electricity to the grid and the photovoltaic plant according to the electrical load of the wind farmCalculating the power supply load value P of the combined heat and power generation unit under the condition that all the electric loads are supplied to the power gridrDetermining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedValue range of (a), heat load Q required by the heat supply network1 HThe waste heat recovery heat supply device is used for meeting the requirements, and then the unit steam extraction heat supply device is used for meeting the requirements;
thirdly, when the waste heat recovery heating device and the unit steam extraction heating device can meet the heat load required by the heat supply network, determining the heat supply load Q of the waste heat recovery heating device according to the heat loadhValue and heat supply load Q of unit steam extraction and heat supply devicedA value;
fourthly, when the waste heat recovery heating device and the unit steam extraction heating device can not meet the heat load required by the heat supply network, subtracting the heat load remaining after the heat load of the waste heat recovery heating device and the heat load of the unit steam extraction heating device from the heat load required by the heat supply network, and then using the heat load of the wind power plant
Figure BDA0002983700730000051
And the heating load of the photovoltaic power station
Figure BDA0002983700730000052
Meet the requirement that the heat supply load of the wind power plant is met
Figure BDA0002983700730000053
And the heating load of the photovoltaic power station
Figure BDA0002983700730000054
To calculate the power supply load F of the wind farm1 FAnd the power supply load F of the photovoltaic power station1 GWhereby the condition of the second step is changed and the power supply load value P of the cogeneration unit is recalculatedrAnd determining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedAnd the third step, the determined waste heat recovery and heat supply deviceHeating load QhValue and heat supply load Q of unit steam extraction and heat supply devicedThe value is in the corresponding value range, and at the moment, the power supply carbon emission C under different electric heating load distributions needs to be calculatedElectric powerValue and carbon emission C of heat supplyHeat generationValues, and comparing;
fifthly, continuously changing the heat supply load of the wind power plant
Figure BDA0002983700730000055
Value and heating load of photovoltaic power station
Figure BDA0002983700730000056
The value is continuously calculated in an iterative way according to the steps, and when the carbon emission C is supplied with electricityElectric powerValue and carbon emission C of heat supplyHeat generationWhen the value is the minimum value, the calculated value of the electric heating load at the moment is the electric heating load distribution value of the multi-energy complementary combined heat and power system, and the iterative computation is finished;
when etah＜0.0036×γ＜ηdThe method comprises the following steps:
the first step, determining boundary conditions before iterative computation, includes: the electric loads of the wind power plant and the photovoltaic power station are all supplied to the power grid;
secondly, calculating to obtain a power supply load value P of the cogeneration unitrDetermining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedValue range of (a), heat load required by the heat supply network
Figure BDA0002983700730000057
The waste heat recovery and heat supply device is used for meeting the requirements, and then the electric heat storage heating station is used for meeting the requirements;
thirdly, when the waste heat recovery heat supply device and the electric heat storage heat station can meet the heat load required by the heat supply network, determining the heat supply load Q of the waste heat recovery heat supply device according to the condition that the unit steam extraction heat supply device does not supply heathValue and heat supply load of electric heat storage thermal station
Figure BDA0002983700730000061
Value, from which the carbon emission C of the power supply is calculatedElectric powerValue and carbon emission C of heat supplyHeat generationA value;
step four, gradually reducing the heat supply load Q of the electric heat storage heating station1 RThe value, the reduced load is satisfied by the unit steam extraction and heat supply device, and the value is QdThen, P is recalculated according to the second steprDetermining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedEnsuring the Q of the third stephValue and Q of the fourth stepdThe value is in the corresponding value range, and then the power supply carbon emission C is calculatedElectric powerValue and carbon emission C of heat supplyHeat generationValue, power supply carbon emission C under different electric heating load distributionElectric powerValue and carbon emission C of heat supplyHeat generationComparing the values;
fifthly, continuously performing iterative calculation according to the steps, and when the carbon emission C is supplied with powerElectric powerValue and carbon emission C of heat supplyHeat generationAnd when the value is the minimum value, the calculated value of the electric heating load at the moment is the distribution value of the electric heating load of the multi-energy complementary cogeneration system, and the iterative calculation is finished.
Further, in the electric heat load scheduling method, the electric load of the wind power plant and the electric load of the photovoltaic power station are all transmitted to the power grid in the early stage of ensuring the lowest electric load required by the external heat supply load of the cogeneration unit.
Further, at ηh＜0.0036×γ＜ηdUnder the condition(s), when the waste heat recovery heat supply device, the unit steam extraction heat supply device and the electric heat storage heat station can not meet the heat load required by the heat network, the boundary condition before iterative calculation is changed, the heat load required by the heat network deducts the redundant heat load after the waste heat recovery heat supply device, the unit steam extraction heat supply device and the electric heat storage heat station supply the heat load, and the heat load of the wind power plant is used for supplying heat
Figure BDA0002983700730000062
And the heating load of the photovoltaic power station
Figure BDA0002983700730000063
To meet the requirement, and then calculating the power supply carbon emission C from the second stepElectric powerValue and carbon emission C of heat supplyHeat generationValue and gradual reduction of the heating load of the electric heat storage heating station
Figure BDA0002983700730000064
The value, the reduced load is also satisfied by the wind farm heating and the photovoltaic power plant heating, and the power supply carbon emission C is calculated from the second step againElectric powerValue and carbon emission C of heat supplyHeat generationComparing the value with the calculated value, and continuously and iteratively calculating when the carbon emission C is suppliedElectric powerValue and carbon emission C of heat supplyHeat generationAnd when the value is the minimum value, the calculated value of the electric heating load at the moment is the distribution value of the electric heating load of the multi-energy complementary cogeneration system, and the iterative calculation is finished.
Further, in the seventh step, when only the carbon emission reduction constraint of the power grid is considered, the electric load of the wind power plant and the electric load of the photovoltaic power station are all transmitted to the power grid, so that the power supply load P of the cogeneration unit is obtainedrHeat load required by heat supply network
Figure BDA0002983700730000065
The system is satisfied by a waste heat recovery heat supply device, a unit steam extraction heat supply device and an electric heat storage heating station.
Compared with the prior art, the invention has the following advantages and effects: (1) the invention increases the flexibility of adjusting the electric and thermal loads of the multi-energy complementary heating system by carrying out the system integration of a wind power plant, a photovoltaic power station and a thermal power plant and coupling the heating technologies of electric heat storage, waste heat recovery and the like; (2) the invention determines the carbon emission factors under different heat supply and power generation working conditions, and sets the electric heating load scheduling method of the multi-energy complementary heat supply system by taking the minimum total carbon emission of the whole system as a constraint condition, thereby ensuring that the total carbon emission of the multi-energy complementary heat supply system is minimum under the condition of meeting any energy supply requirement, being very beneficial to realizing the national carbon neutralization target and having obvious application value.
Drawings
Fig. 1 is a schematic structural diagram of a multi-energy complementary cogeneration system based on carbon emission reduction in an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a multi-energy complementary cogeneration system based on carbon emission reduction when a thermal power plant, a photovoltaic power plant, a wind farm, and an electric heat storage thermal power station have a plurality of units in the embodiment of the invention.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples
Referring to fig. 1, the embodiment relates to an electric heating load scheduling method of a multi-energy complementary cogeneration system based on carbon emission reduction, and the multi-energy complementary cogeneration system comprises a thermal power plant, a wind farm, a photovoltaic power plant and an electric heat storage thermal power station; the thermal power plant is provided with a cogeneration unit, the electricity produced by the cogeneration unit is externally supplied to an electric network, the cogeneration unit is simultaneously connected with a waste heat recovery heat supply device and a unit steam extraction heat supply device, and the heat produced by the waste heat recovery heat supply device and the unit steam extraction heat supply device is externally supplied to the heat network; the wind power plant is provided with a wind generating set, the electric power generated by the wind generating set is externally supplied to a power grid, the wind generating set is connected with an electric heat storage and supply device, and the heat generated by the electric heat storage and supply device is externally supplied to a heat supply network; the photovoltaic power station is provided with a photovoltaic generator set, the electric power produced by the photovoltaic generator set is externally supplied to a power grid, the photovoltaic generator set is connected with an electric heat storage and supply device, and the heat produced by the electric heat storage and supply device is externally supplied to a heat supply network; the electric heat storage and supply device generates heat by using electric power provided by the power grid and supplies the heat to the heat supply network through the outside of the heating power station;
in this embodiment, referring to fig. 2, there are n thermal power plants, m wind farms, j photovoltaic power plants, and k electrical heat storage thermal power stations, where: n is more than or equal to 1, m is more than or equal to 1, j is more than or equal to 1, and k is more than or equal to 1.
The electric heating load scheduling method related to the embodiment comprises the following steps:
combining different heat supply modes of a thermal power plant to obtain a power supply coal consumption calculation model of a cogeneration unit under a certain main steam admission operation working condition as a formula (1):
Wr＝Wr0-f01(Qh)-f02(Qd) (1)
in the formula: wr0The unit is kg/kWh, and the pure condensing operation power supply coal consumption value under the working condition is obtained by inquiring a database consisting of power supply coal consumption corresponding to the historical different pure condensing working conditions of the cogeneration unit;
f01(Qh) Refers to the external heat supply load Q of the waste heat recovery heat supply devicehThe calculation formula of the power supply coal consumption reduction value of the cogeneration unit is
Figure BDA0002983700730000081
Wherein: prFor the power supply load, x, of the cogeneration unit under the current heating conditions1The constant is a proportionality constant, which is a coal saving value generated in the power supply process of the cogeneration unit by the unit heat supply load of the waste heat recovery heat supply device;
f02(Qd) Refers to the external heat supply load Q of the steam extraction and heat supply device of the unitdThe calculation formula of the power supply coal consumption reduction value of the cogeneration unit is
Figure BDA0002983700730000082
Wherein: prFor the power supply load, x, of the cogeneration unit under the current heating conditions2The constant is a proportionality constant, which is a coal saving value generated in the power supply process of the cogeneration unit due to the unit heat supply load of the steam extraction and heat supply device of the unit;
therefore, a carbon emission factor calculation model of the cogeneration unit under a certain main steam admission operation condition is obtained as a formula (2):
βr＝Wr×ρsign board (2)
In the formula: rhoSign boardCarbon emission coefficient of standard coal, in kgCO2A recommended value of 2.46 is generally taken for/kgce;
and (II) combining different heat supply modes of the thermal power plant to obtain a carbon emission factor calculation method of different heat supply modes as follows:
the carbon emission factor calculation model of the waste heat recovery heating device during external heat supply is formula (3):
ηh＝Wh×ρsign board (3)
In the formula: whThe unit of the corresponding heat supply coal consumption is kg/GJ when the waste heat recovery heating device supplies heat to the outside, and the coal consumption converted from the energy consumption of the waste heat recovery heating device and the supplied heat are calculated to obtain the coal consumption; rhoSign boardCarbon emission coefficient of standard coal, in kgCO2A recommended value of 2.46 is generally taken for/kgce;
the carbon emission factor calculation model of the unit steam extraction and heat supply device during external heat supply is formula (4):
ηd＝Wd×ρsign board (4)
In the formula: wdThe unit steam extraction heat supply device is used for supplying heat to the outside, the unit is kg/GJ, and the unit is obtained by calculating the coal consumption converted from the energy consumption of the unit steam extraction heat supply device and the supplied heat; rhoSign boardCarbon emission coefficient of standard coal, in kgCO2A recommended value of 2.46 is generally taken for/kgce;
and (III) determining the area where the multi-energy complementary cogeneration system is located, and then acquiring the latest numerical value of the average carbon emission factor gamma of the regional power grid through query, wherein the unit of the latest numerical value is kgCO2/kWh；
Therefore, the emission reduction benefits generated by the photovoltaic power station and the wind power plant when power is supplied once are the carbon emission quantity value gamma of the regional power grid at each degree of level, and the unit is kgCO2/kWh；
External heat supply of photovoltaic power station, wind power plant and electric heat storage thermal power stationThe carbon emission factors are obtained by calculating the latest average carbon emission factor gamma of the regional power grid, and the average carbon emission factor gamma is equal to 0.0036 multiplied by gamma, and the unit is kgCO2/GJ；
(IV) the power supply load calculation model of the cogeneration unit under a certain main steam admission operation condition is as shown in the formula (5):
Pr＝Pr0-f11(Qh)-f12(Qd) (5)
in the formula: pr0The method comprises the steps that a heat and power cogeneration unit operates corresponding power supply loads in pure condensation under the main steam inflow operation condition, and the pure condensation operation power supply loads under the operation condition are obtained by inquiring a database consisting of the power supply loads corresponding to the operation of the heat and power cogeneration unit under different historical pure condensation operation conditions;
f11(Qh) Refers to the external heat supply load Q of the waste heat recovery heat supply devicehSo that the power supply load of the cogeneration unit is reduced by the calculation formula f11(Qh)＝y1×QhWherein: y is1The waste heat recovery heat supply unit is a proportionality constant, which means that the unit heat supply load of the waste heat recovery heat supply unit reduces the power supply load of the cogeneration unit;
f12(Qd) Refers to the external heat supply load Q of the steam extraction and heat supply device of the unitdSo that the power supply load of the cogeneration unit is reduced by the calculation formula f11(Qd)＝y2×QdWherein: y is2The constant is a proportionality constant, which means that the unit heat supply load of the steam extraction and heat supply device of the unit reduces the power supply load of the cogeneration unit;
(V) at the current moment, acquiring an electric load predicted value F of the next moment when the power grid can be connected to the Internet1 DPredicted value of heat load required by heat supply network
Figure BDA0002983700730000091
Electric load predicted value F available from wind power plantFElectric load predicted value F that photovoltaic power plant can supplyGAnd the relation of the electric heating load of the wind power plant is a formula (6), and the relation of the electric heating load of the photovoltaic power station is a formulaFormula (7):
Figure BDA0002983700730000101
Figure BDA0002983700730000102
in the formula: f1 FIs the on-grid electrical load of the wind farm,
Figure BDA0002983700730000103
for heating loads in wind farms, F1 GIs the on-line electric load of the photovoltaic power station,
Figure BDA0002983700730000104
providing a heating load for the photovoltaic power station;
(VI) electric load F capable of accessing the network according to the electric network1 DHeat supply load of electric heat storage heating station
Figure BDA0002983700730000105
Grid-connected electrical load F of wind farm1 FAnd heat supply load
Figure BDA0002983700730000106
On-grid electrical load F of photovoltaic power station1 GAnd heat supply load
Figure BDA0002983700730000107
Determining the power supply load of the cogeneration unit which can be connected to the network and recording the power supply load as PrElectrical load in kWh and thermal load in GJ, P in this caserThe calculation method is formula (8):
Figure BDA0002983700730000108
heat load required by heat supply network
Figure BDA0002983700730000109
Heating load of electric heat storage heating station
Figure BDA00029837007300001010
Heating load of wind farm
Figure BDA00029837007300001011
Heating load of photovoltaic power station
Figure BDA00029837007300001012
Heat supply load Q of cogeneration unithAnd QdTo satisfy, the relationship is calculated as equation (9):
Figure BDA00029837007300001013
(VII) performing low-carbon scheduling on the electric heating load by formulating an electric heating load constraint relation based on carbon emission reduction, wherein the specific contents comprise:
firstly, the carbon emission C of power supply of the multi-energy complementary cogeneration system is determinedElectric powerCalculation model of (2) and amount of carbon emission C of heat supplyHeat generationThe calculation model of (2) is formula (10) and formula (11), respectively:
Celectric power＝βr×Pr-γ×F1 F-γ×F1 G (10)
Figure BDA00029837007300001014
Second, according to ηh、ηdAnd the size relation of 0.0036 multiplied by gamma, and the electric heating load distribution scheduling of the multi-energy complementary combined heat and power system is carried out through iterative computation, and the specific contents comprise:
when etah＜ηd< 0.0036 × γ:
the first step, determining boundary conditions before iterative computation, includes: the electric heat storage heating station does not supply heat to the outside;
secondly, calculating to obtain a power supply load value P of the cogeneration unit according to the condition that the electric load of the wind power plant is completely supplied to the power grid and the electric load of the photovoltaic power station is completely supplied to the power gridrDetermining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedValue range of (a), heat load Q required by the heat supply network1 HThe waste heat recovery heat supply device is used for meeting the requirements, and then the unit steam extraction heat supply device is used for meeting the requirements;
thirdly, when the waste heat recovery heating device and the unit steam extraction heating device can meet the heat load required by the heat supply network, determining the heat supply load Q of the waste heat recovery heating device according to the heat loadhValue and heat supply load Q of unit steam extraction and heat supply devicedA value;
fourthly, when the waste heat recovery heating device and the unit steam extraction heating device can not meet the heat load required by the heat supply network, subtracting the heat load remaining after the heat load of the waste heat recovery heating device and the heat load of the unit steam extraction heating device from the heat load required by the heat supply network, and then using the heat load of the wind power plant
Figure BDA0002983700730000111
And the heating load of the photovoltaic power station
Figure BDA0002983700730000112
Meet the requirement that the heat supply load of the wind power plant is met
Figure BDA0002983700730000113
And the heating load of the photovoltaic power station
Figure BDA0002983700730000114
To calculate the power supply load F of the wind farm1 FAnd the power supply load F of the photovoltaic power station1 GWhereby the condition of the second step is changed and the power supply load value P of the cogeneration unit is recalculatedrAnd determining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load of unit steam extraction and heat supply deviceLotus QdAnd the third step determines the heating load Q of the waste heat recovery heating devicehValue and heat supply load Q of unit steam extraction and heat supply devicedThe value is in the corresponding value range, and at the moment, the power supply carbon emission C under different electric heating load distributions needs to be calculatedElectric powerValue and carbon emission C of heat supplyHeat generationValues, and comparing;
fifthly, continuously changing the heat supply load of the wind power plant
Figure BDA0002983700730000115
Value and heating load of photovoltaic power station
Figure BDA0002983700730000116
The value is continuously calculated in an iterative way according to the steps, and when the carbon emission C is supplied with electricityElectric powerValue and carbon emission C of heat supplyHeat generationWhen the value is the minimum value, the calculated value of the electric heating load at the moment is the electric heating load distribution value of the multi-energy complementary combined heat and power system, and the iterative computation is finished;
when etah＜0.0036×γ＜ηdThe method comprises the following steps:
the first step, determining boundary conditions before iterative computation, includes: the electric loads of the wind power plant and the photovoltaic power station are all supplied to the power grid;
secondly, calculating to obtain a power supply load value P of the cogeneration unitrDetermining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedValue range of (a), heat load Q required by the heat supply network1 HThe waste heat recovery and heat supply device is used for meeting the requirements, and then the electric heat storage heating station is used for meeting the requirements;
thirdly, when the waste heat recovery heat supply device and the electric heat storage heat station can meet the heat load required by the heat supply network, determining the heat supply load Q of the waste heat recovery heat supply device according to the condition that the unit steam extraction heat supply device does not supply heathValue and heat supply load Q of electric heat storage heat station1 RValue, from which the carbon emission C of the power supply is calculatedElectric powerValue and carbon emission C of heat supplyHeat generationA value;
step four, gradually reducing the heat supply load of the electric heat storage heating station
Figure BDA0002983700730000121
The value, the reduced load is satisfied by the unit steam extraction and heat supply device, and the value is QdThen, P is recalculated according to the second steprDetermining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedEnsuring the Q of the third stephValue and Q of the fourth stepdThe value is in the corresponding value range, and then the power supply carbon emission C is calculatedElectric powerValue and carbon emission C of heat supplyHeat generationValue, power supply carbon emission C under different electric heating load distributionElectric powerValue and carbon emission C of heat supplyHeat generationComparing the values;
fifthly, continuously performing iterative calculation according to the steps, and when the carbon emission C is supplied with powerElectric powerValue and carbon emission C of heat supplyHeat generationAnd when the value is the minimum value, the calculated value of the electric heating load at the moment is the distribution value of the electric heating load of the multi-energy complementary cogeneration system, and the iterative calculation is finished.
In the method for scheduling the electric heating load in the embodiment, the electric load of the wind power plant and the electric load of the photovoltaic power station are all transmitted to the power grid in the early stage of ensuring the lowest electric load required by the external heat supply load of the cogeneration unit.
In the method for scheduling electric heating load of this embodiment, ηh＜0.0036×γ＜ηdUnder the condition(s), when the waste heat recovery heat supply device, the unit steam extraction heat supply device and the electric heat storage heat station can not meet the heat load required by the heat network, the boundary condition before iterative calculation is changed, the heat load required by the heat network deducts the redundant heat load after the waste heat recovery heat supply device, the unit steam extraction heat supply device and the electric heat storage heat station supply the heat load, and the heat load of the wind power plant is used for supplying heat
Figure BDA0002983700730000122
And the heating load of the photovoltaic power station
Figure BDA0002983700730000123
To meet the requirement, and then calculating the power supply carbon emission C from the second stepElectric powerValue and carbon emission C of heat supplyHeat generationValue and gradual reduction of the heating load of the electric heat storage heating station
Figure BDA0002983700730000124
The value, the reduced load is also satisfied by the wind farm heating and the photovoltaic power plant heating, and the power supply carbon emission C is calculated from the second step againElectric powerValue and carbon emission C of heat supplyHeat generationComparing the value with the calculated value, and continuously and iteratively calculating when the carbon emission C is suppliedElectric powerValue and carbon emission C of heat supplyHeat generationAnd when the value is the minimum value, the calculated value of the electric heating load at the moment is the distribution value of the electric heating load of the multi-energy complementary cogeneration system, and the iterative calculation is finished.
In the method for scheduling electric heating loads in this embodiment, only the constraint of carbon emission reduction of the power grid may be considered in the seventh step, and at this time, the electric load of the wind farm and the electric load of the photovoltaic power station are all transmitted to the power grid, so as to obtain the power supply load P of the cogeneration unitrHeat load required by heat supply network
Figure BDA0002983700730000125
The system is satisfied by a waste heat recovery heat supply device, a unit steam extraction heat supply device and an electric heat storage heating station.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.

Claims (4)

1. An electric heating load scheduling method of a multi-energy complementary combined heat and power system based on carbon emission reduction is characterized in that the multi-energy complementary combined heat and power system comprises a thermal power plant, a wind power plant, a photovoltaic power plant and an electric heat storage thermal power station; the thermal power plant is provided with a cogeneration unit, the electricity produced by the cogeneration unit is externally supplied to an electric network, the cogeneration unit is simultaneously connected with a waste heat recovery and heat supply device and a unit steam extraction and heat supply device, and the heat produced by the waste heat recovery and heat supply device and the unit steam extraction and heat supply device is externally supplied to the heat network; the wind power plant is provided with a wind generating set, the electric power generated by the wind generating set is externally supplied to a power grid, the wind generating set is connected with an electric heat storage and supply device, and the heat generated by the electric heat storage and supply device is externally supplied to a heat supply network; the photovoltaic power station is provided with a photovoltaic generator set, the electric power produced by the photovoltaic generator set is externally supplied to a power grid, the photovoltaic generator set is connected with an electric heat storage and supply device, and the heat produced by the electric heat storage and supply device is externally supplied to a heat supply network; the electric heat storage and supply device generates heat by utilizing electric power provided by a power grid and supplies the heat to a heat supply network through the outside of the heating heat station;
the electric heating load scheduling method comprises the following steps:
combining different heat supply modes of a thermal power plant to obtain a power supply coal consumption calculation model of a cogeneration unit under a certain main steam admission operation working condition as a formula (1):
Wr＝Wr0-f01(Qh)-f02(Qd) (1)
in the formula: wr0The unit is kg/kWh, and the pure condensing operation power supply coal consumption value under the working condition is obtained by inquiring a database consisting of power supply coal consumption corresponding to the historical different pure condensing working conditions of the cogeneration unit;
f01(Qh) Refers to the external heat supply load Q of the waste heat recovery heat supply devicehThe calculation formula of the power supply coal consumption reduction value of the cogeneration unit is
Figure FDA0002983700720000011
Wherein: prFor the power supply load, x, of the cogeneration unit under the current heating conditions1The constant is a proportionality constant, which is a coal saving value generated in the power supply process of the cogeneration unit by the unit heat supply load of the waste heat recovery heat supply device;
f02(Qd) Refers to the external heat supply load Q of the steam extraction and heat supply device of the unitdThe calculation formula of the power supply coal consumption reduction value of the cogeneration unit is
Figure FDA0002983700720000012
Wherein: prFor the power supply load, x, of the cogeneration unit under the current heating conditions2The constant is a proportionality constant, which is a coal saving value generated in the power supply process of the cogeneration unit due to the unit heat supply load of the steam extraction and heat supply device of the unit;
therefore, a carbon emission factor calculation model of the cogeneration unit under a certain main steam admission operation condition is obtained as a formula (2):
βr＝Wr×ρsign board (2)
In the formula: rhoSign boardCarbon emission coefficient of standard coal, in kgCO2/kgce；
And (II) combining different heat supply modes of the thermal power plant to obtain a carbon emission factor calculation method of different heat supply modes as follows:
the carbon emission factor calculation model of the waste heat recovery heating device during external heat supply is formula (3):
ηh＝Wh×ρsign board (3)
In the formula: whThe unit of the corresponding heat supply coal consumption is kg/GJ when the waste heat recovery heating device supplies heat to the outside, and the coal consumption converted from the energy consumption of the waste heat recovery heating device and the supplied heat are calculated to obtain the coal consumption; rhoSign boardCarbon emission coefficient of standard coal, in kgCO2/kgce；
The carbon emission factor calculation model of the unit steam extraction and heat supply device during external heat supply is formula (4):
ηd＝Wd×ρsign board (4)
In the formula: wdThe unit steam extraction heat supply device is used for supplying heat to the outside, the unit is kg/GJ, and the unit is obtained by calculating the coal consumption converted from the energy consumption of the unit steam extraction heat supply device and the supplied heat; rhoSign boardCarbon emission coefficient of standard coal, in kgCO2/kgce；
And (III) determining the area where the multi-energy complementary cogeneration system is located, and then acquiring the latest numerical value of the average carbon emission factor gamma of the regional power grid through query, wherein the unit of the latest numerical value is kgCO2/kWh；
Therefore, the emission reduction benefits generated by the photovoltaic power station and the wind power plant when power is supplied once are the carbon emission quantity value gamma of the regional power grid at each degree of level, and the unit is kgCO2/kWh；
The carbon emission factors of the photovoltaic power station, the wind power plant and the electric heat storage thermal power station during external heat supply are obtained by calculating the latest average carbon emission factor gamma of the regional power grid, and the average carbon emission factor gamma is equal to 0.0036 multiplied by gamma and the unit is kgCO2/GJ；
(IV) the power supply load calculation model of the cogeneration unit under a certain main steam admission operation condition is as shown in the formula (5):
Pr＝Pr0-f11(Qh)-f12(Qd) (5)
in the formula: pr0The method comprises the steps that a heat and power cogeneration unit operates corresponding power supply loads in pure condensation under the main steam inflow operation condition, and the pure condensation operation power supply loads under the operation condition are obtained by inquiring a database consisting of the power supply loads corresponding to the operation of the heat and power cogeneration unit under different historical pure condensation operation conditions;
f11(Qh) Refers to the external heat supply load Q of the waste heat recovery heat supply devicehSo that the power supply load of the cogeneration unit is reduced by the calculation formula f11(Qh)＝y1×QhWherein: y is1The waste heat recovery heat supply unit is a proportionality constant, which means that the unit heat supply load of the waste heat recovery heat supply unit reduces the power supply load of the cogeneration unit;
f12(Qd) Refers to the external heat supply load Q of the steam extraction and heat supply device of the unitdSo that the power supply load of the cogeneration unit is reduced by the calculation formula f11(Qd)＝y2×QdWherein: y is2The constant is a proportionality constant, which means that the unit heat supply load of the steam extraction and heat supply device of the unit reduces the power supply load of the cogeneration unit;
(V) at the current moment, acquiring an electric load predicted value F of the next moment when the power grid can be connected to the Internet1 DPredicted value of heat load required by heat supply network
Figure FDA00029837007200000314
Electric load predicted value F available from wind power plantFElectric load predicted value F that photovoltaic power plant can supplyGAnd the electric heating load relational expression of the wind power plant is a formula (6), and the electric heating load relational expression of the photovoltaic power station is a formula (7):
Figure FDA0002983700720000031
Figure FDA0002983700720000032
in the formula: f1 FIs the on-grid electrical load of the wind farm,
Figure FDA0002983700720000033
for heating loads in wind farms, F1 GIs the on-line electric load of the photovoltaic power station,
Figure FDA0002983700720000034
providing a heating load for the photovoltaic power station;
(VI) electric load F capable of accessing the network according to the electric network1 DHeat supply load of electric heat storage heating station
Figure FDA0002983700720000035
Grid-connected electrical load F of wind farm1 FAnd heat supply load
Figure FDA0002983700720000036
On-grid electrical load F of photovoltaic power station1 GAnd heat supply load
Figure FDA0002983700720000037
Determining the power supply load of the cogeneration unit which can be connected to the network and recording the power supply load as PrElectrical load in kWh and thermal load in GJ, P in this caserThe calculation method is formula (8):
Figure FDA0002983700720000038
heat load required by heat supply network
Figure FDA0002983700720000039
Heating load of electric heat storage heating station
Figure FDA00029837007200000310
Heating load of wind farm
Figure FDA00029837007200000311
Heating load of photovoltaic power station
Figure FDA00029837007200000312
Heat supply load Q of cogeneration unithAnd QdTo satisfy, the relationship is calculated as equation (9):
Figure FDA00029837007200000313
(VII) performing low-carbon scheduling on the electric heating load by formulating an electric heating load constraint relation based on carbon emission reduction, wherein the specific contents comprise:
firstly, the carbon emission C of power supply of the multi-energy complementary cogeneration system is determinedElectric powerCalculation model of (2) and amount of carbon emission C of heat supplyHeat generationThe calculation model of (2) is formula (10) and formula (11), respectively:
Celectric power＝βr×Pr-γ×F1 F-γ×F1 G (10)
Figure FDA0002983700720000041
Second, according to ηh、ηdAnd the size relation of 0.0036 multiplied by gamma, and the electric heating load distribution scheduling of the multi-energy complementary combined heat and power system is carried out through iterative computation, and the specific contents comprise:
when etah＜ηd< 0.0036 × γ:
the first step, determining boundary conditions before iterative computation, includes: the electric heat storage heating station does not supply heat to the outside;
secondly, calculating to obtain a power supply load value P of the cogeneration unit according to the condition that the electric load of the wind power plant is completely supplied to the power grid and the electric load of the photovoltaic power station is completely supplied to the power gridrDetermining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedValue range of (a), heat load required by the heat supply network
Figure FDA0002983700720000042
The waste heat recovery heat supply device is used for meeting the requirements, and then the unit steam extraction heat supply device is used for meeting the requirements;
thirdly, when the waste heat recovery heating device and the unit steam extraction heating device can meet the heat load required by the heat supply network, determining the heat supply load Q of the waste heat recovery heating device according to the heat loadhValue and heat supply load Q of unit steam extraction and heat supply devicedA value;
fourthly, when the waste heat recovery heating device and the unit pumpWhen the steam heating device can not meet the heat load required by the heat supply network, the heat load required by the heat supply network subtracts the heat load of the waste heat recovery heating device and the heat load remained after the heat load of the unit steam extraction heating device, and then the heat load of the wind power plant is used
Figure FDA0002983700720000043
And the heating load of the photovoltaic power station
Figure FDA0002983700720000044
Meet the requirement that the heat supply load of the wind power plant is met
Figure FDA0002983700720000045
And the heating load of the photovoltaic power station
Figure FDA0002983700720000046
To calculate the power supply load F of the wind farm1 FAnd the power supply load F of the photovoltaic power station1 GWhereby the condition of the second step is changed and the power supply load value P of the cogeneration unit is recalculatedrAnd determining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedAnd the third step determines the heating load Q of the waste heat recovery heating devicehValue and heat supply load Q of unit steam extraction and heat supply devicedThe value is in the corresponding value range, and at the moment, the power supply carbon emission C under different electric heating load distributions is calculatedElectric powerValue and carbon emission C of heat supplyHeat generationValues, and comparing;
fifthly, continuously changing the heat supply load of the wind power plant
Figure FDA0002983700720000047
Value and heating load of photovoltaic power station
Figure FDA0002983700720000048
Then, according to the above steps, the continuous iteration is performedInstead of calculation, carbon emission C when power is suppliedElectric powerValue and carbon emission C of heat supplyHeat generationWhen the value is the minimum value, the calculated value of the electric heating load at the moment is the electric heating load distribution value of the multi-energy complementary combined heat and power system, and the iterative computation is finished;
when etah＜0.0036×γ＜ηdThe method comprises the following steps:
the first step, determining boundary conditions before iterative computation, includes: the electric loads of the wind power plant and the photovoltaic power station are all supplied to the power grid;
secondly, calculating to obtain a power supply load value P of the cogeneration unitrDetermining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedValue range of (a), heat load required by the heat supply network
Figure FDA0002983700720000051
The waste heat recovery and heat supply device is used for meeting the requirements, and then the electric heat storage heating station is used for meeting the requirements;
thirdly, when the waste heat recovery heat supply device and the electric heat storage heat station can meet the heat load required by the heat supply network, determining the heat supply load Q of the waste heat recovery heat supply device according to the condition that the unit steam extraction heat supply device does not supply heathValue and heat supply load of electric heat storage thermal station
Figure FDA0002983700720000052
Value, from which the carbon emission C of the power supply is calculatedElectric powerValue and carbon emission C of heat supplyHeat generationA value;
step four, gradually reducing the heat supply load of the electric heat storage heating station
Figure FDA0002983700720000053
The value, the reduced load is satisfied by the unit steam extraction and heat supply device, and the value is QdThen, P is recalculated according to the second steprDetermining the heat supply load Q of the waste heat recovery heat supply device under the power supply loadhValue range and heat supply load Q of unit steam extraction and heat supply devicedValue ofRange, guaranteed Q of the third stephValue and Q of the fourth stepdThe value is in the corresponding value range, and then the power supply carbon emission C is calculatedElectric powerValue and carbon emission C of heat supplyHeat generationValue, power supply carbon emission C under different electric heating load distributionElectric powerValue and carbon emission C of heat supplyHeat generationComparing the values;
fifthly, continuously performing iterative calculation according to the steps, and when the carbon emission C is supplied with powerElectric powerValue and carbon emission C of heat supplyHeat generationAnd when the value is the minimum value, the calculated value of the electric heating load at the moment is the distribution value of the electric heating load of the multi-energy complementary cogeneration system, and the iterative calculation is finished.
2. The method for scheduling the electric heating load of the multi-energy complementary cogeneration system based on carbon emission reduction according to claim 1, wherein in the method for scheduling the electric heating load, the electric load of the wind farm and the electric load of the photovoltaic power station are all transmitted to the power grid in the early stage of ensuring the lowest electric load required by the cogeneration unit for supplying heat externally.
3. The method of claim 1, wherein the scheduling of the electrical heating load of the co-generation system is performed at η &h＜0.0036×γ＜ηdUnder the condition(s), when the waste heat recovery heat supply device, the unit steam extraction heat supply device and the electric heat storage heat station can not meet the heat load required by the heat network, the boundary condition before iterative calculation is changed, the heat load required by the heat network deducts the redundant heat load after the waste heat recovery heat supply device, the unit steam extraction heat supply device and the electric heat storage heat station supply the heat load, and the heat load of the wind power plant is used for supplying heat
Figure FDA0002983700720000061
And the heating load of the photovoltaic power station
Figure FDA0002983700720000062
To meet the requirement, and then calculating the power supply carbon emission C from the second stepElectric powerValue and heating carbon emissionsCHeat generationValue and gradual reduction of the heating load of the electric heat storage heating station
Figure FDA0002983700720000063
The value, the reduced load is also satisfied by the wind farm heating and the photovoltaic power plant heating, and the power supply carbon emission C is calculated from the second step againElectric powerValue and carbon emission C of heat supplyHeat generationComparing the value with the calculated value, and continuously and iteratively calculating when the carbon emission C is suppliedElectric powerValue and carbon emission C of heat supplyHeat generationAnd when the value is the minimum value, the calculated value of the electric heating load at the moment is the distribution value of the electric heating load of the multi-energy complementary cogeneration system, and the iterative calculation is finished.
4. The method for scheduling electric heating loads of the multi-energy complementary cogeneration system based on carbon emission reduction according to claim 1, wherein in the seventh step, when only the carbon emission reduction constraint of the power grid is considered, the electric loads of the wind farm and the electric loads of the photovoltaic power station are all transmitted to the power grid, so that the power supply load P of the cogeneration unit is obtainedrHeat load required by heat supply network
Figure FDA0002983700720000064
The system is satisfied by a waste heat recovery heat supply device, a unit steam extraction heat supply device and an electric heat storage heating station.
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