CN115115185A - Hydrogen production and storage capacity configuration method of wind-hydrogen coupling system - Google Patents
Hydrogen production and storage capacity configuration method of wind-hydrogen coupling system Download PDFInfo
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Abstract
The invention discloses a hydrogen production and storage capacity configuration method for a wind-hydrogen coupling system, which aims to overcome the technical problems that the output power of a wind power plant in the prior art has volatility and intermittency and wind abandon is caused by large-scale access of wind power and establish a mathematical model of wind power-hydrogen production-hydrogen storage-hydrogen supply. According to the principle of optimal system yield, the demand of a hydrogen user is met by adopting wind power and commercial power combined power supply, and the hydrogen energy storage system is adopted, so that hydrogen is produced by utilizing wind power as much as possible, the hydrogen production cost is reduced, the effective hydrogen production and storage capacity configuration is realized, and the economical efficiency of the wind hydrogen system is improved. Under the condition of considering the best economy of the wind-hydrogen system, a more reliable hydrogen production and storage system capacity allocation scheme is obtained by simulating a wind-hydrogen combined operation model and combining an optimization model.
Description
Technical Field
The invention relates to the field of wind power plant and hydrogen energy combined development of new energy power generation, in particular to a combined operation of a wind power hydrogen production and storage system and a hydrogen production and storage capacity configuration method.
Background
The wind power hydrogen production and storage system is a complex dynamic system, the input end of the system is supplied by a power grid and wind power jointly, and the output end of the system is supplied by a hydrogen storage tank and hydrogen production equipment jointly to meet the requirements of hydrogen users. The output power of the wind power plant has volatility and intermittence, the scheduling pressure of a power grid is increased after the wind power plant is accessed in a large scale, and the problem of wind abandon is easy to occur. Meanwhile, the price of the large-scale industrial electricity hydrogen production is higher than that of the wind power hydrogen production, and wind power plant development enterprises can also utilize the hydrogen production and storage system, so that the loss of the generated energy caused by the power limitation of a power grid is reduced as much as possible, the overall generated energy of the system is improved, the project income is improved by selling green hydrogen, and the application prospect is wide.
The invention discloses a hydrogen production and storage capacity configuration method of a wind-hydrogen coupling system. The method establishes a mathematical model for wind power hydrogen production, hydrogen storage and hydrogen supply, optimizes the hydrogen production and storage capacity, and obtains a more reliable hydrogen production and storage system capacity allocation scheme by simulating a wind-hydrogen combined operation model and combining an optimization model in a planning stage of a wind power hydrogen production and storage system under the condition of considering the best economy of the wind-hydrogen system.
Disclosure of Invention
The invention aims to overcome the technical problems that output power of a wind power plant has volatility and intermittency in the prior art and wind abandon occurs due to large-scale access of wind power, provides a hydrogen production and storage capacity configuration method of a wind-hydrogen coupling system, establishes a mathematical model of wind power-hydrogen production-hydrogen storage-hydrogen supply, meets the requirements of hydrogen users by adopting wind power and commercial power combined power supply according to the principle of optimal system yield, reduces hydrogen production cost by adopting a hydrogen storage system and utilizing the wind power as much as possible to produce hydrogen, realizes effective hydrogen production and storage capacity configuration, and improves the economy of the wind-hydrogen system. Under the condition of considering the best economy of the wind-hydrogen system, a more reliable capacity configuration scheme of the hydrogen production and storage system is obtained by simulating a wind-hydrogen combined operation model and combining an optimization model.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a hydrogen production and storage capacity configuration method of a wind-hydrogen coupling system, wherein the wind-hydrogen coupling system utilizes wind power and mains supply to jointly supply power for hydrogen production, storage and supply, and the method comprises the following steps:
and 2, coupling a scheduling strategy of the wind-hydrogen coupling system, simulating the operation of the system, and optimally configuring hydrogen production and storage capacity by using an optimization model.
Preferably, the step 1 further comprises:
101, respectively calculating the capacity C of a storage tank at the end of a time interval i when the wind power output meets or does not meet the power consumption requirement of all hydrogen demands of users in the time interval;
102, calculating all wind power online electricity quantity, wind power hydrogen production electricity quantity, wind power hydrogen storage electricity quantity and online shopping electricity quantity in a simulation time period i;
and 103, calculating the economic index of the wind-hydrogen system in the simulation time period, and selecting the net present value index.
Preferably, the step 101 further includes:
acquiring user hydrogen demand H in time period i i (ii) a t is the number of hours of period i; t is the total hours of the simulation time period; actual output w of wind power plant in time interval i i (ii) a Time interval i maximum hydrogen production amount B of hydrogen production equipment max (ii) a Maximum hydrogen storage capacity C in hydrogen storage tank max (ii) a Hydrogen capacity C in hydrogen storage tank at initial time of period i i (ii) a The economic parameters are as follows: the electricity consumption e is produced by each standard cubic hydrogen; selling hydrogen per standard cubic meter by s; wind power grid price S w (ii) a Online electricity purchase price S p (ii) a Wind power output for surfing on line
Wind power output for hydrogen production
Wind power output for storing hydrogen
Power for producing hydrogen by purchasing electricity from network
For the time period i, if the wind power output meets the power consumption requirement for preparing all hydrogen required by the user,
then
Hydrogen is produced by the surplus electric quantity of the wind power, and is stored by a hydrogen storage system;
for the time period i, if the wind power output does not meet the power consumption requirement for preparing all the hydrogen demand of the user,
then
The storage tank is started to supply hydrogen, and when the storage tank is insufficient, the grid power is used for producing hydrogen.
Preferably, the wind power surplus electric quantity is used for hydrogen production, and is stored by a hydrogen storage system, and the method further comprises the following steps:
if the storage tank is full at the beginning of the time period i ＝C max The wind power output scheduling mode is
If the storage tank is not full at the beginning of the time period max ＞C i And judging the relationship among the wind power output, the storage tank allowance and the hydrogen production equipment allowance, and scheduling the wind power output.
Preferably, the storage tank is started to supply hydrogen, and when the storage tank is insufficient, the hydrogen is produced by using grid power, and the method further comprises the following steps:
if it is
Then the
If it is
Then
Said C is i+1 Is the hydrogen capacity in the hydrogen storage tank 1 hour after period i.
Preferably, the storage tank is not full of C at the beginning of the time period max ＞C i Judging the relation among wind power output, storage tank allowance and hydrogen production equipment allowance, and scheduling the wind power output, further comprising:
if B is max -H i ≤C max -C i And w is i -eH i /t＞e·(B max -H i ) And t, the wind power output scheduling mode is as follows:
if B is max -H i ≤C max -C i And w is i -eH i /t＜e·(B max -H i ) And t, the wind power output scheduling mode is as follows:
if B is max -H i ＞C max -C i And w is a i -eH i ＞e·(C max -C i ) And t, the wind power output scheduling mode is as follows: c i+1 ＝C max ，w s ＝e·(C max -C i )/t，
If B is max -H i ＞C max -C i And w is i -eH i ＞e·(C max -C i ) And t, the wind power output scheduling mode is as follows: c i+1 ＝C i +(w i t/e-H i )，w s ＝w i -eH i /t，
Said C is i+1 Is the hydrogen capacity in the hydrogen storage tank 1 hour after period i.
Preferably, the step 2 further comprises:
step 201, randomly initializing a parent population with the population size of q, wherein the parent population contains all information of the scale of hydrogen production equipment and the capacity of a hydrogen storage tank;
step 202, generating an offspring population with the same mathematical theory as the parent population by adopting selection, crossing and mutation operators, and combining the population size to be 2 q;
step 203, forming a new parent elite population q' by adopting a non-dominated sorting method according to the beneficial degree of the profitability index of the wind power-hydrogen production-hydrogen storage system;
step 204, setting the number of next generation samples as 2q, wherein 1/2 randomly generates new samples, and the population is doubled after the new samples are added;
step 205, looping steps 202-204 until the process reaches the rate of return indicator convergence;
and step 206, outputting the optimized solution and the corresponding hydrogen production scale, hydrogen storage tank capacity and optimized target value.
The invention has the following beneficial effects aiming at the problem of optimal configuration of hydrogen production and storage capacity during planning of the wind power-hydrogen production-storage system: (1) a wind power and commercial power combined power supply model is constructed, a wind power-hydrogen production-hydrogen storage-hydrogen supply mathematical model is established, hydrogen production cost is reduced to the maximum extent, and the model is used as the basis for optimal configuration of hydrogen production and hydrogen storage capacity. (2) And optimizing the hydrogen production and storage capacity by implementing an optimization algorithm, effectively identifying and solving the relationship among the hydrogen production and storage scale, the hydrogen selling price and the economy, and providing important reference for planning decisions. (3) In the optimized configuration, different working conditions can be considered, the coupling of the wind-hydrogen scheduling strategy and the optimized configuration method is realized, the configuration result with the optimal economical efficiency is obtained through optimized calculation, and the benefits of the hydrogen production and storage system are brought into play.
Drawings
FIG. 1 is a flow chart of a hydrogen production and storage capacity configuration method of a wind-hydrogen coupling system of the present application
Fig. 2 is a frame diagram of a wind power-hydrogen production-hydrogen storage-hydrogen supply scheduling strategy in an embodiment of the present application.
FIG. 3 is a diagram of the relationship between different optimization variables and the economic indicator of the system in the embodiment of the present application.
FIG. 4 is a system cost and revenue analysis diagram for three exemplary scenarios in an embodiment of the present application.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
The invention discloses a hydrogen production and storage capacity configuration method of a wind-hydrogen coupling system. The method sets a wind power-hydrogen production-hydrogen storage-hydrogen supply scheduling strategy according to the principle of optimal system yield. The demand of hydrogen users is met by adopting wind power and commercial power combined power supply, and the hydrogen energy storage system is adopted, so that hydrogen is produced by utilizing wind power as much as possible, and the hydrogen production cost is reduced.
The method comprises the following steps:
and 2, coupling a scheduling strategy of the wind-hydrogen coupling system, simulating the operation of the system, and optimally configuring hydrogen production and storage capacity by using an optimization model.
Specifically, the step 1 further includes:
step 101, for a time interval i, respectively calculating the capacity C of the storage tank at the end of the time interval i when the wind power output meets or does not meet the power consumption requirement of all hydrogen demands of users in the time interval.
The step 101 further includes:
acquiring user hydrogen demand H in time period i i (ii) a t is the number of hours of period i; t is the total hours of the simulation time period; actual output w of wind power plant in time interval i i (ii) a Time interval i maximum hydrogen production amount B of hydrogen production equipment max (ii) a Maximum hydrogen storage capacity C in hydrogen storage tank max (ii) a Hydrogen capacity C in hydrogen storage tank at initial time of period i i (ii) a The economic parameters are as follows: the electricity consumption e is produced by each standard cubic hydrogen; selling hydrogen per standard cubic meter by s; wind power grid price S w (ii) a Online electricity purchase price S p (ii) a Wind power output for surfing on line
Wind power output for hydrogen production
Wind power output for storing hydrogen
Power for producing hydrogen by purchasing electricity from network
For the time period i, if the wind power output meets the power consumption requirement of preparing all hydrogen required by the user, calculating the capacity C of the storage tank at the end of the time period, and using the wind power output for surfing the Internet w p (ii) a Wind power output for hydrogen production w h (ii) a Wind power output for storing hydrogen w s (ii) a Online power purchase for hydrogen production P h 。
For time period i, if
Then
The surplus electric quantity of wind power is used for producing hydrogen, and the hydrogen is stored by a hydrogen storage system, and the strategy is as follows:
(1) if the storage tank is full for the first time period i ＝C max Then the wind power output is adjustedIn the way of
(2) If the storage tank is not full at the beginning of the time period max ＞C i Judging the relation among wind power output, storage tank allowance and hydrogen production equipment allowance, and scheduling the wind power output, wherein the specific scheduling strategy is as follows:
(2.1) if B max -H i ≤C max -C i And w is i -eH i /t＞e·(B max -H i ) And t, the wind power output scheduling mode is as follows:
(2.2) if B max -H i ≤C max -C i And w is i -eH i /t＜e·(B max -H i ) And t, the wind power output scheduling mode is as follows:
(2.3) if B max -H i ＞C max -C i And w is i -eH i ＞e·(C max -C i ) And t, the wind power output scheduling mode is as follows: c i+1 ＝C max ，w s ＝e·(C max -C i )/t，
(2.4) if B max -H i ＞C max -C i And w is i -eH i ＞e·(C max -C i ) And t, the wind power output scheduling mode is as follows: c i+1 ＝C i +(w i t/e-H i )，w s ＝w i -eH i /t，
Said C is i+1 Is the hydrogen capacity in the hydrogen storage tank 1 hour after period i.
For the time interval i, if the wind power output does not meet the power consumption requirement for preparing all hydrogen required by the user, calculating the capacity C of the storage tank at the end of the time interval, and using the output for surfing the Internet w p (ii) a Wind power output for hydrogen production w h (ii) a Wind power output for storing hydrogen w s (ii) a Online power purchase for hydrogen production P h 。
For time period i, if
Then
Starting a storage tank to supply hydrogen, and when the storage tank is insufficient, using grid power to produce hydrogen, wherein the strategy is as follows:
if it is
Then the
If it is
Then C is i+1 ＝0，
Said C is i+1 Is the hydrogen capacity in the hydrogen storage tank 1 hour after period i.
And 102, calculating all wind power online electricity quantity, wind power hydrogen production electricity quantity, wind power hydrogen storage electricity quantity and online shopping electricity quantity in the simulation time period i.
And 103, calculating the economic index of the wind-hydrogen system in the simulation time period, and selecting the net present value index.
Specifically, the step 2 further includes:
step 201, randomly initializing a parent population with the population size of q, wherein the parent population contains all information of the scale of hydrogen production equipment and the capacity of a hydrogen storage tank;
step 202, generating an offspring population with the same mathematical theory as the parent population by adopting selection, crossing and mutation operators, and combining the population size to be 2 q;
step 203, forming a new parent elite population q' by adopting a non-dominated sorting method according to the beneficial degree of the profitability index of the wind power-hydrogen production-hydrogen storage system;
step 204, setting the number of next generation samples as 2q, wherein 1/2 randomly generates new samples, and the population is doubled after the new samples are added;
step 205, looping steps 202-204 until the process reaches the rate of return indicator convergence;
and step 206, outputting the optimized solution and the corresponding hydrogen production scale, hydrogen storage tank capacity and optimized target value.
Aiming at the problem of optimal configuration of hydrogen production and storage capacity during planning of a wind power-hydrogen production-storage system, (1) a wind power and commercial power combined power supply model is constructed, a mathematical model of wind power-hydrogen production-storage-hydrogen supply is established, the hydrogen production cost is reduced to the maximum extent, and the mathematical model is used as the basis for optimal configuration of the hydrogen production and storage capacity. (2) And optimizing the hydrogen production and storage capacity by implementing an optimization algorithm, effectively identifying and solving the relationship among the hydrogen production and storage scale, the hydrogen selling price and the economy, and providing important reference for planning decisions. (3) In the optimized configuration, different working conditions can be considered, the coupling of the wind-hydrogen scheduling strategy and the optimized configuration method is realized, the configuration result with the optimal economical efficiency is obtained through optimized calculation, and the benefits of the hydrogen production and storage system are brought into play.
In order to illustrate the effect of the present invention, the method of the present invention will be described in detail below with reference to the actual data of hydrogen consumption of a certain domestic wind farm (installed capacity 250MW) and a refinery as an example of the present invention.
The capacity allocation method of the invention firstly sets a target function according to the requirements of the wind-hydrogen system. According to the characteristics of a wind storage system in a multi-wind-abandoning area, the maximum net current value is mainly selected as a target.
Performing optimization calculation according to the scheduling strategy and the optimization method,
FIG. 2 is a frame diagram of a wind power-hydrogen production-hydrogen storage-hydrogen supply scheduling strategy. When the wind power is sufficient, the hydrogen production is carried out according to the priority of hydrogen production supply users, hydrogen production for hydrogen storage and power selling on the internet, and the priority is used for hydrogen production; when the hydrogen production amount of wind power is insufficient, the storage tank is preferentially adopted for hydrogen supply, and when the hydrogen storage amount of the storage tank is insufficient, electricity is purchased from a power grid for hydrogen production, so that the user requirements are met; and a wind power-grid power combined hydrogen production system and a hydrogen production and hydrogen storage tank combined hydrogen supply system are formed.
FIG. 3 shows the net present value of a project when the selling price of hydrogen per standard cubic meter is 4 yuan and the volume ratio is different. As can be seen in the figure, as the capacity of the hydrogen plant increases, the project economics become progressively better, at 1.2 ten thousand Nm 3 And the capacity of the storage tank is 25 ten thousand meters 3 Optimally, namely, the hydrogen production equipment is overlarge, the investment is high, the utilization rate is low, the economy is not good, the hydrogen production equipment is too small, the wind power cannot be effectively utilized, and the economy is not good; the storage tank has too small capacity, cannot utilize redundant wind power to produce hydrogen, and is unfavorable to the economy, the storage tank has too large capacity, and the storage tank vacancy rate is high, and is unfavorable to the economy.
FIG. 4 is a graph of system cost versus revenue analysis for three exemplary scenarios. Scheme 1 Hydrogen production plant Capacity 1.1 ten thousand Nm 3 Scheme 2 hydrogen plant capacity 1.2 ten thousand Nm 3 Scheme 3 hydrogen plant capacity 1.3 ten thousand Nm 3 The capacity of each storage tank is 25 ten thousand Nm 3 . In the figure, the income of hydrogen sale of each scheme is the same and meets the requirement of a user, and the rationality of model calculation is verified; the total investment is increased after the capacity of the hydrogen production equipment is increased, and the income of wind power on-line is reduced, namely the hydrogen production amount of wind power is increased, but the annual net power purchase for hydrogen production is obviously reduced. A balance point exists between wind power hydrogen production and equipment investment, and a scheme 2 is an optimal scheme by combining the net present value index of a figure 1.
Claims (7)
1. A hydrogen production and storage capacity configuration method of a wind-hydrogen coupling system, wherein the wind-hydrogen coupling system utilizes wind power and mains supply to jointly supply power for hydrogen production, storage and supply, and is characterized by comprising the following steps:
step 1, according to scheduling strategies of hydrogen production, hydrogen storage and hydrogen supply in a wind-hydrogen coupling system, simulating and calculating economic indexes of the wind-hydrogen coupling system, and establishing mathematical models of the hydrogen production, the hydrogen storage and the hydrogen supply;
and 2, coupling a scheduling strategy of the wind-hydrogen coupling system, simulating the operation of the system, and optimally configuring hydrogen production and storage capacity by using an optimization model.
2. The method for configuring hydrogen production and storage capacity of wind-hydrogen coupling system according to claim 1, wherein the step 1 further comprises:
101, respectively calculating the capacity C of a storage tank at the end of a time interval i when the wind power output meets or does not meet the power consumption requirement of all hydrogen demands of users in the time interval;
102, calculating all wind power online electricity quantity, wind power hydrogen production electricity quantity, wind power hydrogen storage electricity quantity and online shopping electricity quantity in a simulation time period i;
and 103, calculating the economic index of the wind-hydrogen system in the simulation time period, and selecting the net present value index.
3. The method for configuring hydrogen production and storage capacity of wind-hydrogen coupling system according to claim 2, wherein the step 101 further comprises:
acquiring user hydrogen demand H in time period i i (ii) a t is the number of hours of period i; t is the total hours of the simulation time period; actual output w of wind power plant in time interval i i (ii) a Time interval i maximum hydrogen production amount B of hydrogen production equipment max (ii) a Maximum hydrogen storage capacity C in hydrogen storage tank max (ii) a Hydrogen capacity C in hydrogen storage tank at initial time of period i i (ii) a The economic parameters are as follows: the electricity consumption e is produced by each standard cubic hydrogen; selling hydrogen per standard cubic meter by s; wind power grid price S w (ii) a Online electricity purchase price S p (ii) a Wind power output for surfing on line
Wind power output for hydrogen production
Wind power output for storing hydrogen
Power P for purchasing electricity to produce hydrogen i h ；
For the time period i, if the wind power output meets the power consumption requirement for preparing all hydrogen required by the user,
then
Hydrogen is produced by the surplus electric quantity of the wind power, and is stored by a hydrogen storage system;
for the time period i, if the wind power output does not meet the power consumption requirement for preparing all hydrogen required by the user,
then
The storage tank is started to supply hydrogen, and when the storage tank is insufficient, the grid power is used for producing hydrogen.
4. The method for configuring hydrogen production and storage capacity of a wind-hydrogen coupling system according to claim 3, wherein the surplus electric power of wind power is used for producing hydrogen and stored by the hydrogen storage system, further comprising:
if the storage tank is full at the beginning of the time period i ＝C max The wind power output scheduling mode is
P i h ＝0；
If the storage tank is not full at the beginning of the time period max ＞C i And judging the relation among the wind power output, the storage tank allowance and the hydrogen production equipment allowance, and scheduling the wind power output.
5. The method for configuring hydrogen production and storage capacity of wind-hydrogen coupling system according to claim 3, wherein the storage tank is started to supply hydrogen, and when the storage tank is insufficient, the net power is used for producing hydrogen, further comprising:
if it is
Then
P i h ＝0；
If it is
Then C is i+1 ＝0，
Said C is i+1 Is the hydrogen capacity in the hydrogen storage tank 1 hour after period i.
6. The method for configuring hydrogen production and storage capacity of wind-hydrogen coupled system according to claim 4, wherein the storage tank is not full of C at the beginning of a certain time period max ＞C i Judging the relation among wind power output, storage tank allowance and hydrogen production equipment allowance, and scheduling the wind power output, further comprising:
if B is max -H i ≤C max -C i And w is i -eH i /t＞e·(B max -H i ) And t, the wind power output scheduling mode is as follows:
P i h ＝0；
if B is max -H i ≤C max -C i And w is i -eH i /t＜e·(B max -H i ) And t, the wind power output scheduling mode is as follows:
P i h ＝0；
if B is max -H i ＞C max -C i And w is i -eH i ＞e·(C max -C i ) And t, the wind power output scheduling mode is as follows: c i+1 ＝C max ，w s ＝e·(C max -C i )/t，
P i h ＝0；
If B is max -H i ＞C max -C i And w is i -eH i ＞e·(C max -C i ) And t, the wind power output scheduling mode is as follows: c i+1 ＝C i +(w i t/e-H i )，w s ＝w i -eH i /t，
P i h 0, C i+1 Is the hydrogen capacity in the hydrogen storage tank 1 hour after period i.
7. The method for configuring hydrogen production and storage capacity of wind-hydrogen coupling system according to claim 1, wherein the step 2 further comprises:
step 201, randomly initializing a parent population with the population size of q, wherein the parent population contains all information of the scale of hydrogen production equipment and the capacity of a hydrogen storage tank;
step 202, generating an offspring population with the same mathematical theory as the parent population by adopting selection, crossing and mutation operators, and combining the population size to be 2 q;
step 203, forming a new parent elite population q' by adopting a non-dominated sorting method according to the beneficial degree of the profitability index of the wind power-hydrogen production-hydrogen storage system;
step 204, setting the number of next generation samples as 2q, wherein 1/2 randomly generates new samples, and the population is doubled after the new samples are added;
step 205, looping through steps 202 to 204 until the procedure reaches the rate of return index convergence;
and step 206, outputting the optimized solution and the corresponding hydrogen production scale, hydrogen storage tank capacity and optimized target value.
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| CN115940234A (en) * | 2022-12-30 | 2023-04-07 | 郑州大学 | Intelligent regulation and control method for household renewable energy distributed power generation |
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| CN115940234A (en) * | 2022-12-30 | 2023-04-07 | 郑州大学 | Intelligent regulation and control method for household renewable energy distributed power generation |
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