CN117277381A - Multi-energy coordination complementary efficient power generation system and power generation scheme optimization model - Google Patents
Multi-energy coordination complementary efficient power generation system and power generation scheme optimization model Download PDFInfo
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- 238000010248 power generation Methods 0.000 title claims abstract description 161
- 230000000295 complement effect Effects 0.000 title claims abstract description 57
- 238000005457 optimization Methods 0.000 title claims abstract description 21
- 239000013535 sea water Substances 0.000 claims abstract description 133
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 115
- 239000001257 hydrogen Substances 0.000 claims abstract description 115
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 115
- 239000000446 fuel Substances 0.000 claims abstract description 58
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- 230000009194 climbing Effects 0.000 claims abstract description 13
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- 238000005868 electrolysis reaction Methods 0.000 claims description 16
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- 238000007599 discharging Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
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- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
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- 238000004146 energy storage Methods 0.000 description 7
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- 238000007667 floating Methods 0.000 description 2
- 239000010200 folin Substances 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
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- H—ELECTRICITY
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- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- 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
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Abstract
A multi-energy coordination complementary efficient power generation system and a power generation scheme optimization model are constructed, and a tidal wind power generation system, a seawater efficient utilization system, an electrolytic seawater hydrogen storage and hydrogen fuel cell power generation system and a waste heat utilization organic Rankine cycle system are combined to form the multi-energy coordination complementary efficient power generation system. Constructing an objective function by taking the maximum generated energy of the multi-energy coordination complementary efficient power generation system as a target; constructing constraint conditions according to electric power balance constraint, unit climbing constraint, power constraint of electrolyzed seawater hydrogen production and electric power constraint of a hydrogen fuel cell unit; and constructing a power generation scheme optimization model of the multi-energy coordination complementary efficient power generation system by applying the constraint condition of the objective function. And solving a power generation scheme optimization model of the multi-energy coordination complementary efficient power generation system by using MATLAB to obtain an optimized power generation scheme. The invention can more efficiently and coordinately utilize clean new energy, realize the coordination and efficient power generation of various energy, realize the cascade utilization of energy and improve the utilization rate of clean energy.
Description
Technical Field
The invention relates to the technical field of multi-energy complementary power generation and energy storage, in particular to a multi-energy coordinated complementary efficient power generation system and a power generation scheme optimization model.
Background
The hydrogen energy power generation mainly adopts a hydrogen fuel cell to generate power, and a lot of high-temperature smoke is generated at the same time of generating power by the hydrogen fuel cell, which means that a great part of hydrogen energy is not effectively utilized and is dissipated along with the high-temperature smoke.
Regarding the absorption of wind power, tidal power generation and hydrogen power generation, a lot of students have conducted very sufficient researches, literature [1] Shen Jianjian, wang Yue, cheng Chuntian and the like, water-wind-solar multi-energy complementary power generation scheduling problems are researched current situation and hope [ J ]. Chinese motor engineering journal, 2022,42 (11): 3871-3885, a water-wind-solar multi-energy complementary power generation scheduling strategy is constructed in the Chinese motor engineering journal, so that the coordination and complementation of water and wind are perfected, and the power generation efficiency and clean energy consumption are improved; the power cloud coupling model analysis of wind-light-water multi-energy complementary power generation system [ J ]. Power grid technology, 2021,45 (05): 1750-1759. Water-wind-light multi-energy complementary is the same but the coupling among the systems becomes key, so that the relation among the multi-energy power generation is more compact, and the power generation efficiency is further improved; the method comprises the following steps of (1) analyzing the time scale operation characteristics of a wind-solar-water multi-energy complementary power generation system in the day by using a folin, qu Xiaoxu, gorgeous fragrance and the like in the literature [ J ] automatically using a power system, and (2018,42) (04) analyzing the time scale operation characteristics of the wind-solar multi-energy complementary power generation system in the day by using the folin, 5225 (04), so that the scheduling effect is further improved; shi Zhao, wang Weisheng, huang Yuehui, etc. the method for hierarchical optimizing and planning of electricity and heat storage capacity of the multi-energy complementary power generation system is [ J ]. The power grid technology, 2020,44 (09): 3263-3271. The energy storage is introduced into the water-wind-solar multi-energy complementary system, but the energy storage is simply heat storage and electricity storage, and the energy cleanliness of the energy storage is not guaranteed.
From the above documents, it can be seen that many similar studies are carried out on land, and huge offshore wind power and tidal energy are not utilized; and the energy storage facility introduced is not a clean energy source.
Disclosure of Invention
In order to overcome the defects in the technology, the offshore wind power and tidal energy are efficiently utilized, and clean energy storage equipment is introduced, the offshore wind power, the tidal energy and the hydrogen energy are combined, a multi-energy coordinated complementary efficient power generation system and a power generation scheme optimization model are provided, clean new energy can be more efficiently and cooperatively utilized, multiple energy coordinated efficient power generation is realized, energy cascade utilization is realized, and the clean energy utilization rate is improved.
The technical scheme adopted by the invention is as follows:
a multi-energy coordinated complementary high efficiency power generation system comprising: the system comprises a tidal wind power generation system, a seawater high-efficiency utilization system, an electrolytic seawater hydrogen storage and hydrogen fuel cell power generation system and a waste heat utilization organic Rankine cycle system;
the tidal wind power generation system comprises a seawater tidal kinetic energy system, a wind kinetic energy system and a kinetic energy generator; the kinetic energy generator is respectively connected with a sea water tide kinetic energy system and a wind power kinetic energy system; the seawater tide kinetic energy system collects seawater tide kinetic energy and pushes the kinetic energy generator to operate for power generation; the wind power kinetic energy system collects wind power kinetic energy and pushes the kinetic energy generator to operate for power generation; the kinetic energy generator is connected with the load end and provides power for the load end;
the seawater high-efficiency utilization system comprises a seawater introduction system, a cooling introduction system, an electrolytic seawater tank introduction system and a seawater discharge system;
the seawater introducing system is connected with the cooling introducing system, the cooling introducing system is connected with the electrolytic seawater pond introducing system, and the electrolytic seawater pond introducing system is connected with the seawater discharging system; the seawater enters the cooling introducing system through the seawater introducing system, flows into the electrolytic seawater pond introducing system, and is finally discharged through the seawater discharging system; the cooling introducing system introduces cold seawater into the working medium cooling system to cool the high-temperature organic working medium; the seawater electrolysis pool introduction system introduces seawater into the seawater electrolysis pool system to electrolyze the seawater to prepare hydrogen;
the electrolytic seawater hydrogen storage and hydrogen fuel cell power generation system comprises an electrolytic seawater pool system, a hydrogen storage tank, a hydrogen fuel cell reactor and an alternating current-direct current conversion system; the electrolysis sea water pool system is connected with a hydrogen storage tank, the hydrogen storage tank is connected with a hydrogen fuel cell reactor, and the hydrogen fuel cell reactor is connected with an alternating current-direct current conversion system;
the waste heat utilization organic Rankine cycle system comprises a plate type smoke heat source heat exchanger, an expansion generator, a working medium cooling system and a working medium pump; the plate type smoke heat source heat exchanger is connected with the expansion generator, the expansion generator is connected with the working medium cooling system, and the working medium cooling system is connected with the working medium pump;
introducing seawater into an electrolytic seawater pond system by the electrolytic seawater pond introducing system, and electrolyzing the seawater to prepare hydrogen; the hydrogen is stored in a hydrogen storage tank, the hydrogen storage tank conveys the hydrogen to a hydrogen fuel cell reactor for chemical reaction to generate electricity, and the electric energy is conveyed to a load end through an alternating current-direct current conversion system; the high-temperature flue gas outlet of the hydrogen fuel cell reactor is connected with the plate type flue gas heat source heat exchanger, the high-temperature flue gas of the hydrogen fuel cell reactor exchanges heat with the organic working medium flowing through the plate type flue gas heat source heat exchanger, and low-temperature flue gas is discharged;
the organic working medium is heated to an overheat state through the plate type smoke heat source heat exchanger, the overheat working medium generates power through the work of the expansion generator, the overheat working medium is input into the working medium cooling system by the expansion generator for cooling, the cooled organic working medium flows into the working medium pump, the working medium pump pumps the working medium into the plate type smoke heat source heat exchanger, and the circulation is ended; the expansion generator generates power by acting and transmits the generated power to the load end for the user to use.
Constructing constraint conditions by using electric power balance constraint, unit climbing constraint, electrolyzed seawater hydrogen production power constraint and hydrogen fuel cell unit electric power constraint, and constructing a power generation scheme optimization model of the multi-energy coordination complementary efficient power generation system by combining an objective function and the constraint conditions;
the maximum generating capacity of the multi-energy coordination complementary efficient generating system is taken as a target, an objective function is constructed, and the expression is as follows:
wherein:
wherein: p (P) N The total power generation output power of the multi-energy coordination complementary high-efficiency power generation system is calculated; p (P) W&T (t) is the power output of the tidal wind power generation system; p (P) CHP (t) is the power generation output of the fuel cell; p (P) ORC (t) is the power generation output of the waste heat organic Rankine cycle; p'. W&T (t) is the total power generation of the tidal wind power generation system;power for electrolysis of seawater; />Is the total energy of the fuel cell; alpha is the conversion rate of the waste heat organic Rankine cycle.
The electric power balance constraint expression is as follows:
P L ＝P H +P N
wherein: p (P) L Is the load power; p (P) H Is the output power of the conventional unit.
The unit climbing constraint condition expression is as follows:
wherein:maximum downhill speed for a multi-energy coordinated complementary high-efficiency generator set, < >>Maximum climbing speed of a multifunctional coordinated complementary efficient generator set>Maximum downhill speed for a conventional unit, +.>The maximum climbing speed of the conventional unit; p (P) H (t) is the output power of the conventional unit at the moment t; p (P) H (t-1) is the output power P of the conventional unit at the time t-1 N (t) is the total power generation output work of the multi-energy coordination complementary high-efficiency power generation system at the moment t; p (P) N (t-1) is the total power output power of the multi-energy coordination complementary high-efficiency power generation system at the moment t-1;
the power constraint expression for the hydrogen production of the electrolyzed seawater is as follows:
wherein: e is the electric energy required by the chemical reaction of hydrogen production by seawater electrolysis; q (Q) cell Is the heat energy required by the chemical reaction of hydrogen production by seawater electrolysis; t (T) o Is environmentA temperature; t (T) s Is the heating source temperature; s is the cross-sectional area of the electrolytic cell;maximum hydrogen production power of the electrolytic seawater hydrogen production device; />The amount of hydrogen consumed for the fuel cell; w (W) H2 Power is produced for the electrolysis of seawater hydrogen; p (P) H2 (t) is the electric power of the electrolyzed seawater;
the electric power constraint condition expression of the hydrogen fuel cell unit is as follows:
wherein: e (E) Nernst A Nernst voltage for the fuel cell stack; f is Faraday constant;is the molar mass of hydrogen; t (T) fc Is the fuel cell stack temperature; t (T) b Is the standard temperature; />The standard entropy change value is corresponding to the standard atmospheric pressure; r is a gas constant; />The hydrogen partial pressure is adopted; />The oxygen partial pressure is adopted; />Is the partial pressure value of water vapor; />The amount of hydrogen consumed for the fuel cell; 1.229 is a industry custom constant.
And solving a power generation scheme optimization model of the multi-energy coordination complementary efficient power generation system by using MATLAB to obtain an optimized power generation scheme. The optimized power generation scheme is as follows: generating capacity P of wind power tidal power generation system in each period W&T (t) Power generation amount per period P of Hydrogen Fuel cell System CHP (t) Power Generation P per period of organic Rankine Power Generation System ORC (t)。
The invention relates to a multi-energy coordination complementary efficient power generation system and a power generation scheme optimization model, which have the following technical effects:
1) The invention can more efficiently utilize new energy to generate electricity, realizes the step efficient utilization of energy, and increases the utilization rate of new energy to generate electricity while ensuring the stability of power supply level.
2) The power generation system solves the problem that the prior art lacks a multifunctional coordinated and complementary efficient power generation system formed by coupling of offshore wind power, offshore tidal energy and hydrogen energy storage, and improves the energy utilization rate of the novel energy sources in the mutual coupling.
3) The power generation scheme optimization model serves the power generation system, and the energy utilization rate can be improved by matching the power generation scheme optimization model with the power generation system.
Drawings
FIG. 1 is a diagram of a multi-energy coordinated complementary high efficiency power generation system framework.
In fig. 1: the system comprises a 1-seawater tidal kinetic energy system, a 2-wind kinetic energy system, a 3-kinetic energy generator, a 4-seawater introducing system, a 5-cooling introducing system, a 6-electrolytic seawater tank introducing system, a 7-seawater discharging system, an 8-electrolytic seawater tank system, a 9-hydrogen storage tank, a 10-hydrogen fuel cell reactor, an 11-alternating current-direct current conversion system, a 12-plate type smoke heat source heat exchanger, a 13-expansion generator, a 14-working medium cooling system and a 15-working medium pump.
FIG. 2 is a graph of the scheduling results of a multi-energy coordinated complementary high efficiency power generation system employing the present invention.
FIG. 3 is a diagram of a multi-energy coordinated complementary high efficiency power generation system in accordance with an embodiment of the present invention.
Detailed Description
A modeling method for a multi-energy coordination complementary efficient power generation system and a power generation scheme optimization model comprises the following steps:
step 1: the method comprises the steps of constructing a tidal wind power generation system, a seawater high-efficiency utilization system, an electrolytic seawater hydrogen storage and hydrogen fuel cell power generation system and a waste heat utilization organic Rankine cycle system, and combining to form a multi-energy coordination complementary high-efficiency power generation system;
step 2: constructing an objective function by taking the maximum generated energy of the multi-energy coordination complementary efficient power generation system as a target;
step 3: constructing constraint conditions according to electric power balance constraint, unit climbing constraint, power constraint of electrolyzed seawater hydrogen production and electric power constraint of a hydrogen fuel cell unit;
step 4: constructing a power generation scheme optimization model of the multi-energy coordination complementary high-efficiency power generation system by applying the objective function in the step 2 and the constraint condition in the step 3;
step 5; and (3) solving the power generation scheme optimization model of the multi-energy coordination complementary efficient power generation system constructed in the step (4) by applying MATLAB to obtain an optimized power generation scheme.
In the step 1 and the step 2, the tidal wind power generation system, the seawater high-efficiency utilization system, the electrolyzed water hydrogen storage and hydrogen fuel cell power generation system, the waste heat utilization organic Rankine cycle system and the multi-energy coordination complementary high-efficiency power generation system are specifically as follows:
the multi-energy coordination complementary efficient power generation system comprises a tidal wind power generation system, a seawater efficient utilization system, an electrolyzed water hydrogen storage and hydrogen fuel cell power generation system and a waste heat utilization organic Rankine cycle system;
the tidal wind power generation system comprises a seawater tidal kinetic energy system 1, a wind kinetic energy system 2 and a kinetic energy generator 3;
the kinetic energy generator 3 is respectively connected with the sea water tide kinetic energy system 1 and the wind power kinetic energy system 2; the seawater tide kinetic energy system 1 collects seawater tide kinetic energy and pushes the kinetic energy generator 3 to operate for power generation; the wind kinetic energy system 2 collects wind kinetic energy and pushes the kinetic energy generator 3 to operate for power generation; the kinetic energy generator 3 is connected with the load end 16, and the kinetic energy generator 3 provides power for the load end 16;
the sea water tidal energy system 1 comprises a traditional floating tidal energy-mechanical energy quasi-exchange device;
the wind power kinetic energy system 2 comprises a traditional wind power blade type wind power-mechanical energy conversion device;
the kinetic energy generator 3 converts mechanical energy transmitted by the system floating type tidal energy-mechanical energy quasi-conversion device and the traditional wind power blade type wind energy-mechanical energy conversion device into electric energy.
The seawater high-efficiency utilization system comprises a seawater introduction system 4, a cooling introduction system 5, an electrolytic seawater tank introduction system 6 and a seawater discharge system 7;
the seawater introducing system 4 comprises a seawater flowing pipeline;
the cooling intake system 5 includes a pipe through which seawater is introduced into the cooling device;
the electrolytic seawater pond introducing system 6 comprises a pipeline for introducing seawater into the electrolytic seawater pond;
the seawater discharge system 7 comprises a discharge seawater pipeline.
The seawater introducing system 4 is connected with a cooling introducing system 5, the cooling introducing system 5 is connected with an electrolytic seawater tank introducing system 6, and the electrolytic seawater tank introducing system 6 is connected with a seawater discharging system 7; seawater enters the cooling introducing system 5 through the seawater introducing system 4, flows into the electrolytic seawater pond introducing system 6, and finally is discharged through the seawater discharging system 7; the cooling introducing system 5 introduces cold seawater into the working medium cooling system 14 to cool the high-temperature organic working medium; the electrolytic seawater pond introducing system 6 introduces seawater into the electrolytic seawater pond system 8 to electrolyze the seawater to prepare hydrogen;
the electrolytic seawater hydrogen storage and hydrogen fuel cell power generation system comprises an electrolytic seawater pool system 8, a hydrogen storage tank 9, a hydrogen fuel cell reactor 10 and an alternating current-direct current conversion system 11;
the electrolytic seawater pond system 8 comprises a conventional electrolytic seawater pond;
the ac-dc conversion system 11 includes a conventional ac-dc conversion device;
the electrolysis sea water pool system 8 is connected with a hydrogen storage tank 9, the hydrogen storage tank 9 is connected with a hydrogen fuel cell reactor 10, and the hydrogen fuel cell reactor 10 is connected with an alternating current-direct current conversion system 11;
the waste heat utilization organic Rankine cycle system comprises a plate type smoke heat source heat exchanger 12, an expansion generator 13, a working medium cooling system 14 and a working medium pump 15; the plate type flue gas heat source heat exchanger 12 is connected with the expansion generator 13, the expansion generator 13 is connected with the working medium cooling system 14, and the working medium cooling system 14 is connected with the working medium pump 15;
the working medium cooling system 14 comprises a working medium cooling device;
introducing seawater into an electrolytic seawater pond system 8 by an electrolytic seawater pond introducing system 6, and electrolyzing the seawater to prepare hydrogen; the hydrogen gas is stored in a hydrogen storage tank 9, the hydrogen storage tank 9 conveys the hydrogen gas to a hydrogen fuel cell reactor 10 for chemical reaction power generation, and electric energy is conveyed to a load end 16 through an alternating current-direct current conversion system 11; the high-temperature flue gas outlet of the hydrogen fuel cell reactor 10 is connected with the plate type flue gas heat source heat exchanger 12, and the high-temperature flue gas of the hydrogen fuel cell reactor 10 exchanges heat with the organic working medium flowing through the plate type flue gas heat source heat exchanger 12 to discharge low-temperature flue gas;
the organic working medium is heated to an overheat state through the plate-type smoke heat source heat exchanger 12, the overheat working medium generates power through the power generation of the expansion generator 13, the overheat working medium is input into the working medium cooling system 14 by the expansion generator 13 for cooling, the cooled organic working medium flows into the working medium pump 15, and is pumped into the plate-type smoke heat source heat exchanger 12 by the working medium pump 15, and the circulation is ended; the expansion generator 13 performs work and generates power to be transmitted to the load end 16 for the user to use.
As shown in the embodiment of fig. 3, the multi-energy coordinated complementary efficient power generation system includes four power generation bodies respectively: wind power generation, tidal power generation, electrolytic hydrogen power generation and waste heat Rankine cycle power generation.
The four power generation bodies supply power for the power load together: the wind power generation supplies power to the power load through a wind power generator; tidal power generation supplies power to an electric load through a tidal power generator; generating hydrogen through electrolysis of hydrogen, supplying the generated hydrogen to a fuel cell stack to generate electricity, and supplying power to an electric load after AC-DC conversion; the waste heat Rankine cycle power generation utilizes the waste heat generated during the hydrogen fuel cell stack power generation through the plate-type flue gas heat exchanger, and the power load is supplied through the Rankine cycle power generation.
In the construction of the objective function, an objective function expression is set as follows:
wherein:
wherein: p (P) N The total power generation output power of the multi-energy coordination complementary high-efficiency power generation system is calculated; p (P) W&T (t) is the power output of the tidal wind power generation system; p (P) CHP (t) is the power generation output of the fuel cell; p (P) ORC And (t) is the power generation output power of the waste heat organic Rankine cycle. P'. W&T (t) is the total power generation of the tidal wind power generation system;for the power used for the electrolysis of seawater.
The electric power balance constraint condition in the step 3 is characterized in that the electric power balance constraint condition expression is as follows:
P L ＝P H +P N
wherein: p (P) L Is the load power; p (P) H Is the output power of the conventional unit.
The unit climbing constraint condition in the step 3 is characterized in that the unit climbing constraint condition expression is as follows:
wherein:maximum downhill speed for a multi-energy coordinated complementary high-efficiency generator set, < >>Maximum climbing speed of a multifunctional coordinated complementary efficient generator set>Maximum downhill speed for a conventional unit, +.>Is the maximum climbing speed of the conventional unit.
The constraint condition for producing the electrolyzed seawater hydrogen is characterized in that the expression of the constraint condition for producing the electrolyzed seawater hydrogen is as follows:
wherein: e is the electric energy required by the chemical reaction of hydrogen production by seawater electrolysis, Q cell Is the heat energy required by the chemical reaction of hydrogen production by seawater electrolysis, T o Is environmentTemperature, T s For the heating source temperature, S is the cross-sectional area of the electrolytic cell,for the maximum hydrogen production power of the electrolytic seawater hydrogen production device, < >>The amount of hydrogen consumed for the fuel cell.
The electric power constraint condition of the hydrogen fuel cell unit in the step 3 is characterized in that the electric power constraint condition of the hydrogen fuel cell unit is expressed as follows:
wherein: e (E) Nernst For the nernst voltage of the fuel cell stack, F is the faraday constant,is the molar mass of hydrogen, T fc For fuel cell stack temperature, T b For standard temperature, +.>Is the corresponding standard entropy change value under the standard atmospheric pressure, R is the gas constant, and +.>Is hydrogen partial pressure>Oxygen partial pressure>Is the partial pressure of water vapor.
And 4, a power generation scheme optimization model of the multi-energy coordination complementary efficient power generation system has the following expression:
objective function:
wherein:
constraint conditions:
the optimized power generation scheme in the step 5 is as follows: applying MATLAB to solve a power generation scheme optimization model of the multi-energy coordination complementary efficient power generation system, and obtaining an optimized power generation scheme as follows: generating capacity P of wind power tidal power generation system in each period W&T (t) Power generation amount per period P of Hydrogen Fuel cell System CHP (t) and Power Generation P per period of organic Rankine Power Generation System ORC (t). The scheduling result is shown in fig. 2, and the total power generation amount obtained by applying the power generation scheme optimization model of the multi-energy coordination complementary high-efficiency power generation system is higher than the single power generation amount of any energy, so that the energy utilization effect of the new energy is promoted, and the development of the new energy is facilitated.
Claims (4)
1. A multi-energy coordinated complementary efficient power generation system, comprising: the system comprises a tidal wind power generation system, a seawater high-efficiency utilization system, an electrolytic seawater hydrogen storage and hydrogen fuel cell power generation system and a waste heat utilization organic Rankine cycle system;
the tidal wind power generation system comprises a seawater tidal kinetic energy system (1), a wind kinetic energy system (2) and a kinetic energy generator (3);
the kinetic energy generator (3) is respectively connected with the sea water tide kinetic energy system (1) and the wind power kinetic energy system (2); the seawater tide kinetic energy system (1) collects seawater tide kinetic energy and pushes the kinetic energy generator (3) to operate for power generation; the wind power kinetic energy system (2) collects wind power kinetic energy and pushes the kinetic energy generator (3) to operate for power generation; the kinetic energy generator (3) is connected with the load end (16), and the kinetic energy generator (3) provides power for the load end (16);
the seawater high-efficiency utilization system comprises a seawater introduction system (4), a cooling introduction system (5), an electrolytic seawater tank introduction system (6) and a seawater discharge system (7);
the seawater introducing system (4) is connected with the cooling introducing system (5), the cooling introducing system (5) is connected with the electrolytic seawater pond introducing system (6), and the electrolytic seawater pond introducing system (6) is connected with the seawater discharging system (7); seawater enters a cooling introduction system (5) through a seawater introduction system (4), flows into an electrolytic seawater tank introduction system (6), and is finally discharged through a seawater discharge system (7); the cooling introducing system (5) introduces cold seawater into the working medium cooling system (14) to cool the high-temperature organic working medium; the electrolytic seawater pond introducing system (6) introduces seawater into the electrolytic seawater pond system (8) to electrolyze the seawater to prepare hydrogen;
the electrolytic seawater hydrogen storage and hydrogen fuel cell power generation system comprises an electrolytic seawater cell system (8), a hydrogen storage tank (9), a hydrogen fuel cell reactor (10) and an alternating current-direct current conversion system (11); the electrolytic seawater pool system (8) is connected with a hydrogen storage tank (9), the hydrogen storage tank (9) is connected with a hydrogen fuel cell reactor (10), and the hydrogen fuel cell reactor (10) is connected with an alternating current-direct current conversion system (11);
the waste heat utilization organic Rankine cycle system comprises a plate type flue gas heat source heat exchanger (12), an expansion generator (13), a working medium cooling system (14) and a working medium pump (15); the plate type flue gas heat source heat exchanger (12) is connected with the expansion generator (13), the expansion generator (13) is connected with the working medium cooling system (14), and the working medium cooling system (14) is connected with the working medium pump (15);
introducing seawater into an electrolytic seawater pond system (8) by an electrolytic seawater pond introducing system (6), and electrolyzing the seawater to prepare hydrogen; the hydrogen gas is stored in a hydrogen storage tank (9), the hydrogen storage tank (9) conveys the hydrogen gas to a hydrogen fuel cell reactor (10) for chemical reaction power generation, and electric energy is conveyed to a load end (16) through an alternating current-direct current conversion system (11); the high-temperature flue gas outlet of the hydrogen fuel cell reactor (10) is connected with the plate type flue gas heat source heat exchanger (12), the high-temperature flue gas of the hydrogen fuel cell reactor (10) exchanges heat with an organic working medium flowing through the plate type flue gas heat source heat exchanger (12), and low-temperature flue gas is discharged;
the organic working medium is heated to an overheat state through the plate type smoke heat source heat exchanger (12), the overheat working medium is subjected to power generation through the expansion generator (13), the expansion generator (13) inputs the overheat working medium into the working medium cooling system (14) for cooling, the cooled organic working medium flows into the working medium pump (15), the working medium pump (15) pumps the working medium into the plate type smoke heat source heat exchanger (12), and the circulation is ended; the expansion generator (13) generates power and transmits the power to the load end (16) for the user to use.
2. The utility model provides a multipotency coordination complementary high-efficient power generation system power generation scheme optimizing model which characterized in that: the maximum generating capacity of the multi-energy coordination complementary efficient generating system is taken as a target, an objective function is constructed, and the expression is as follows:
wherein: p (P) W&T (t)＝P' W&T (t)-P H2 (t)
Wherein: p (P) N The total power generation output power of the multi-energy coordination complementary high-efficiency power generation system is calculated; p (P) W&T (t) is the power output of the tidal wind power generation system; p (P) CHP (t) is the power generation output of the fuel cell; p (P) ORC (t) is the power generation output of the waste heat organic Rankine cycle; p'. W&T (t) is the total power generation of the tidal wind power generation system;power for electrolysis of seawater;is the total energy of the fuel cell; alpha is the conversion rate of the waste heat organic Rankine cycle.
3. The multi-energy coordinated complementary efficient power generation system power generation scheme optimization model of claim 2, wherein:
the electric power balance constraint expression is as follows:
P L ＝P H +P N
wherein: p (P) L Is the load power; p (P) H The output power of the conventional unit;
the unit climbing constraint condition expression is as follows:
wherein:maximum downhill speed for a multi-energy coordinated complementary high-efficiency generator set, < >>Maximum climbing speed of a multifunctional coordinated complementary efficient generator set>Maximum downhill speed for a conventional unit, +.>The maximum climbing speed of the conventional unit; p (P) H (t) is the output power of the conventional unit at the moment t; p (P) H (t-1) is the output power P of the conventional unit at the time t-1 N (t) isThe total power generation output work of the complementary high-efficiency power generation system at the moment t is coordinated through multiple energy; p (P) N (t-1) is the total power output power of the multi-energy coordination complementary high-efficiency power generation system at the moment t-1;
the power constraint expression for the hydrogen production of the electrolyzed seawater is as follows:
wherein: e is the electric energy required by the chemical reaction of hydrogen production by seawater electrolysis; q (Q) cell Is the heat energy required by the chemical reaction of hydrogen production by seawater electrolysis; t (T) o Is ambient temperature; t (T) s Is the heating source temperature; s is the cross-sectional area of the electrolytic cell;maximum hydrogen production power of the electrolytic seawater hydrogen production device; />The amount of hydrogen consumed for the fuel cell; w (W) H2 Power is produced for the electrolysis of seawater hydrogen; p (P) H2 (t) is the electric power of the electrolyzed seawater;
the electric power constraint condition expression of the hydrogen fuel cell unit is as follows:
wherein: e (E) Nernst A Nernst voltage for the fuel cell stack; f is Faraday constant;is the molar mass of hydrogen; t (T) fc Is the fuel cell stack temperature; t (T) b Is the standard temperature; />The standard entropy change value is corresponding to the standard atmospheric pressure; r is a gas constant; />The hydrogen partial pressure is adopted; />The oxygen partial pressure is adopted; />Is the partial pressure value of water vapor; />The amount of hydrogen consumed for the fuel cell.
4. The multi-energy coordinated complementary efficient power generation system power generation scheme optimization model of claim 3, wherein: MATLAB is applied to solve a power generation scheme optimization model of a multi-energy coordination complementary efficient power generation system, and an optimized power generation scheme is obtained, wherein the power generation amount P of each period of the wind power tidal power generation system is calculated W&T (t) Power generation amount per period P of Hydrogen Fuel cell System CHP (t) Power Generation P per period of organic Rankine Power Generation System ORC (t)。
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