CN104573156B - A kind of Seawater Desalination Project total scale and grouping module scale computational methods and device - Google Patents
A kind of Seawater Desalination Project total scale and grouping module scale computational methods and device Download PDFInfo
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- 239000013535 sea water Substances 0.000 title claims abstract description 191
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 190
- 238000000205 computational method Methods 0.000 title abstract 2
- 238000010248 power generation Methods 0.000 claims abstract description 155
- 238000009826 distribution Methods 0.000 claims abstract description 77
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- 238000000034 method Methods 0.000 claims abstract description 29
- 230000008878 coupling Effects 0.000 claims description 21
- 238000010168 coupling process Methods 0.000 claims description 21
- 238000005859 coupling reaction Methods 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000010276 construction Methods 0.000 claims description 10
- 238000013461 design Methods 0.000 claims description 10
- 238000004146 energy storage Methods 0.000 claims description 9
- 238000005457 optimization Methods 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000008859 change Effects 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 abstract 3
- 238000012886 linear function Methods 0.000 description 5
- 238000001223 reverse osmosis Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
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Abstract
The present invention provides a kind of Seawater Desalination Project total scale and grouping module scale computational methods and device, belongs to wind-powered electricity generation-desalinization coupled system field.This method, applied to wind-powered electricity generation-desalinization coupled system, comprise the following steps：Obtain wind power and cumulative frequency distribution and wind power generation cumulative frequency distribution curve occurs；Cumulative frequency distribution curve is occurred according to the wind power and determines Seawater Desalination Project total scale；Cumulative frequency distribution curve and the Seawater Desalination Project total scale are occurred according to the wind power, Seawater Desalination Project is subjected to modularization packet；The grouping module scale carried out to Seawater Desalination Project after modularization packet optimizes.The method of the present invention realizes that seawater desalination system load can change and be allowed to the change of wind-power electricity generation power consumption immediately and adapt to wind power generation capacity by desalinization water scale.
Description
Technical Field
The invention relates to the field of wind power-seawater desalination coupling systems, in particular to a method and a device for calculating the total scale of seawater desalination and the scale of a grouping module.
Background
Wind energy is a good renewable energy source, and wind power generation is the most dominant mode for wind energy utilization at present. According to the international energy agency related report, by the end of 2011, the global installed wind power generation capacity is increased from 18GW at the end of 2000 to about 238GW, wherein only 2011 installed capacity is increased by nearly 41 GW. In 2010, the installed capacity of the power generation exceeds that of the united states, and the country with the largest total installed capacity of the wind power generation is formed. However, due to the volatility, intermittency and instability of wind power, the problems of power grid connection, consumption and the like are gradually highlighted in the wind power development process, so that the development of the wind power generation user side market is realized, and the realization of spontaneous self-use and local consumption of the user side becomes one of effective ways for solving the utilization and consumption of the wind power.
On the other hand, coastal and island areas rich in wind power resources in China are mostly regions deficient in fresh water resources. Seawater is a rich and unconventional source of water. The seawater desalination is one of the important ways for developing and utilizing unconventional water resources, and is beneficial to relieving the problem of water resource shortage.
By coupling wind energy and a seawater desalination treatment system, renewable energy can be efficiently converted into scarce fresh water resources, so that the renewable energy can be utilized on site, the problems of difficulty in grid connection and low utilization rate of wind power are well solved, water is produced on site in water-deficient areas, and the lack of water resources can be relieved to a certain extent.
The fluctuation of wind power generation causes that the seawater desalination device continuously and stably operates by only depending on the power generated by the fan, thereby influencing the service efficiency of the seawater desalination device and the service life of equipment. Therefore, if the load of the seawater desalination system can be changed instantly along with the change of the wind power generation, the utilization rate of the wind power can be improved accordingly.
Meanwhile, due to the random fluctuation of wind speeds in various regions, the wind power generation power has large fluctuation along with the wind speeds. Taking the power generation characteristic of an off-grid fan on a spanish kanali island as an example, when the wind speed reaches the starting wind speed of 3m/s, the wind speed is kept within the range of 3-8 m/s, and after the fan is started for 28min, the fan can enable the power generation power to reach and be stabilized at 50 +/-1 Hz through a built-in flywheel. In the starting process, the fluctuation range of the generated power of the fan is within the range of 0-38 KW. When the fan is started to stably run, the relation between the generated power of the fan and the running speed of a fan generating rotor is close, the variation range of electric power is 30-80 KW, and the variation range is large. Therefore, adjusting the scale of seawater desalination and water production to make the power consumption adapt to the wind power generation amount is one of the key problems to be solved by the wind power-seawater desalination coupled system.
However, the design and construction of the wind power-seawater desalination coupling system project are still in the starting stage, and the load of the seawater desalination system can not be changed in real time along with the change of wind power generation, so that the power consumption of the seawater desalination system adapts to the wind power generation amount.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method and a device for calculating the total scale and the grouping module scale of a seawater desalination project, which can realize that the load of a seawater desalination system can be changed in real time along with the change of wind power generation and the power consumption of the seawater desalination system can adapt to the wind power generation capacity by adjusting the scale of seawater desalination water production.
In order to achieve the above object, an embodiment of the present invention provides a method for calculating a total scale and a grouping module scale of a seawater desalination project, which is applied to a wind power-seawater desalination coupling system, and includes the following steps:
acquiring wind power generation accumulated frequency distribution and a wind power generation accumulated frequency distribution curve;
determining the total scale of the seawater desalination project according to the wind power generation accumulated frequency distribution curve;
modularly grouping the seawater desalination projects according to the wind power generation accumulated frequency distribution curve and the total scale of the seawater desalination projects;
and optimizing the scale of the grouped modules after the seawater desalination engineering is subjected to modular grouping.
The step of obtaining wind power generation accumulated frequency distribution and a wind power generation accumulated frequency distribution curve comprises the following steps:
calculating and converting the obtained wind data or wind power data into wind power generation frequency;
and calculating and converting the wind power generation frequency into wind power generation cumulative frequency distribution, and carrying out S-shaped curve fitting on the wind power generation cumulative probability to obtain a wind power generation cumulative frequency distribution curve.
The step of determining the total scale of the seawater desalination project according to the wind power generation accumulated frequency distribution curve comprises the following steps of:
determining the corresponding wind power generation power when the cumulative frequency is in a first threshold range according to the wind power generation cumulative frequency distribution curve;
the wind power generation power is used as the electric power available for the seawater desalination engineering, and the electric quantity required by the unit water yield in the seawater desalination process is divided to obtain the total scale of the first seawater desalination engineering;
estimating according to an engineering empirical formula to obtain the total scale of the second seawater desalination engineering;
and comparing the total scale of the first seawater desalination project with the total scale of the second seawater desalination project, and taking the smaller value as the total scale of the seawater desalination projects.
The engineering empirical formula is an exponential formula, and the value range of exponential parameters is 0.8-1.2.
Wherein the value range of the index parameter is 1.0-1.05.
Wherein the index parameter value is 1.016.
Wherein the first threshold range is 10% -30%.
The step of modularly grouping the seawater desalination projects according to the wind power generation accumulated frequency distribution curve and the total scale of the seawater desalination projects comprises the following steps of:
according to the wind power generation accumulated frequency distribution curve, determining wind power generation power corresponding to the accumulated frequency greater than a second threshold, dividing the wind power generation power by the electric quantity required by the unit water yield in the seawater desalination process to obtain the minimum scale of the modules, and performing modular grouping; or
And determining wind power generation power corresponding to the accumulated frequency as a third threshold according to the wind power generation accumulated frequency distribution curve, dividing the wind power generation power by the electric quantity required by the unit water yield in the seawater desalination process, and performing modular grouping by taking the obtained module scale as each module scale.
And the sum of the sizes of the grouped modules after the modular grouping is not larger than the total size of the seawater desalination project.
Wherein the second threshold is 80% and the third threshold is 50%.
The method comprises the following steps of performing modular grouping on seawater desalination engineering, and optimizing the modular size of the grouped modules, wherein the modular grouping comprises the following steps:
by linear function requirement, i.e. water production scale = fmax，f(xi)=Σxi≤xTEconomic cost = gmin，g(xi)=ΣBi+Σh(xi) Obtaining the design and construction of a grouping module of the seawater desalination project;
wherein x isiFor the size of the module packet, BiThe equipment cost, h (x), corresponding to the size of each modulei) The energy storage equipment cost required for each module scale.
The embodiment of the invention provides a device for calculating the total scale and the grouping module scale of a seawater desalination project, which is applied to a wind power-seawater desalination coupling system and comprises the following components:
the first obtaining module is used for obtaining wind power generation accumulated frequency distribution and a wind power generation accumulated frequency distribution curve;
the total scale determining module is used for determining the total scale of the seawater desalination project according to the wind power generation accumulated frequency distribution curve;
the grouping module is used for modularly grouping the seawater desalination engineering according to the wind power generation accumulated frequency distribution and the total scale of the seawater desalination engineering;
and the optimization module is used for optimizing the scale of the grouping module after the seawater desalination project is subjected to modular grouping.
Wherein the first obtaining module comprises:
the first obtaining submodule is used for calculating and converting the obtained wind data or wind power data into wind power generation frequency;
and the second obtaining submodule is used for converting the wind power generation frequency calculation into wind power generation cumulative frequency distribution and carrying out S-shaped curve fitting on the wind power generation cumulative probability to obtain a wind power generation cumulative frequency distribution curve.
Wherein the total size determination module comprises:
the wind power generation power confirming module is used for confirming the corresponding wind power generation power when the cumulative frequency is in a first threshold value range according to the wind power generation cumulative frequency distribution curve;
the third obtaining submodule is used for taking the wind power generation power as the electric power available for the seawater desalination engineering and dividing the electric power by the electric quantity required by the unit water yield in the seawater desalination process to obtain the total scale of the first seawater desalination engineering;
the fourth obtaining submodule is used for obtaining the total scale of the second seawater desalination project according to the project empirical formula estimation;
and the comparison module is used for comparing the total scale of the first seawater desalination project with the total scale of the second seawater desalination project and taking the smaller value as the total scale of the seawater desalination projects.
The engineering empirical formula is an exponential formula, and the value range of exponential parameters is 0.8-1.2.
Wherein the value range of the index parameter is 1.0-1.05.
Wherein the index parameter value is 1.016.
Wherein the first threshold range is 10% -30%.
Wherein the grouping module comprises:
the first grouping submodule is used for determining the wind power generation power corresponding to the cumulative frequency greater than a second threshold value according to the wind power generation cumulative frequency distribution curve, dividing the wind power generation power by the electric quantity required by the unit water yield in the sea water desalination process to obtain the minimum scale of the modules, and performing modular grouping; or
And the second sub-module for modularly grouping the wind power generation power corresponding to the accumulated frequency as the third threshold value by dividing the wind power generation power by the electric quantity required by the unit water yield in the seawater desalination process, wherein the obtained module scale is used as each module scale.
And the sum of the sizes of the grouped modules after the modular grouping is not larger than the total size of the seawater desalination project.
Wherein the second threshold is 80% and the third threshold is 50%.
Wherein the optimization module comprises:
an optimization submodule for passing the linear function requirement, i.e. water production scale = fmax，f(xi)=Σxi≤xTEconomic cost = gmin，g(xi)=ΣBi+Σh(xi) Obtaining the design and construction of a grouping module of the seawater desalination project;
wherein x isiFor the size of the module packet, BiThe equipment cost, h (x), corresponding to the size of each modulei) The energy storage equipment cost required for each module scale.
The technical scheme of the invention has the following beneficial effects:
the method for calculating the total scale and the grouping module scale of the seawater desalination project comprises the following steps of 1, obtaining wind power generation accumulated frequency distribution and a wind power generation accumulated frequency distribution curve; then determining the total scale of the seawater desalination project according to the wind power generation accumulated frequency distribution curve in the step 2; step 3, modularly grouping the seawater desalination projects according to the wind power generation accumulated frequency distribution curve and the total scale of the seawater desalination projects; and finally, step 4, optimizing the scale of the grouped modules after the seawater desalination engineering is modularly grouped. The wind power-seawater desalination coupling system can finally obtain reasonable design and construction of a seawater desalination engineering grouping module in the wind power-seawater desalination coupling system, on the premise that the requirement that the total water production scale of the wind power-seawater desalination coupling system is as large as possible is met, the cost of the grouping overall seawater desalination process equipment and the cost of wind power energy storage equipment are reasonably reduced, and the system load can be changed in real time along with the change of wind power generation and the power consumption of the system can adapt to the wind power generation capacity.
Drawings
FIG. 1 is a schematic diagram illustrating steps of a method for calculating the total scale and the block scale of a seawater desalination project according to an embodiment of the present invention;
FIG. 2 is a schematic block diagram of a device for calculating the total scale and the block scale of a seawater desalination project according to an embodiment of the present invention;
FIG. 3 is a first grouping mode of reverse osmosis seawater desalination engineering modules in a wind power-seawater desalination coupled system;
FIG. 4 shows a grouping mode II of reverse osmosis seawater desalination engineering modules in the wind power-seawater desalination coupled system.
Description of the reference numerals
P1, P2, P3: producing water by osmosis; c1, C2, C3: the water was concentrated.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a method for calculating the total scale and the grouping module scale of a seawater desalination project, aiming at the problems that the load of a seawater desalination system can not be changed in real time along with the change of wind power generation and the power consumption of the seawater desalination system can be adapted to the wind power generation capacity by the conventional wind power-seawater desalination coupling system.
As shown in fig. 1, the method for calculating the total scale and the grouping module scale of the seawater desalination engineering according to the embodiment of the present invention is applied to a wind power-seawater desalination coupling system, and includes the following steps:
1, acquiring wind power generation accumulated frequency distribution and a wind power generation accumulated frequency distribution curve;
2, determining the total scale of the seawater desalination project according to the wind power generation accumulated frequency distribution curve;
3, modularly grouping the seawater desalination projects according to the wind power generation accumulated frequency distribution curve and the total scale of the seawater desalination projects;
and 4, optimizing the scale of the grouped modules after the seawater desalination engineering is subjected to modular grouping.
Through the steps 1, 2, 3 and 4, the wind power-seawater desalination coupling system can finally obtain reasonable design and construction of a seawater desalination engineering grouping module in the wind power-seawater desalination coupling system, on the premise that the total water production scale of the wind power-seawater desalination coupling system is as large as possible, the equipment cost of the grouping overall seawater desalination process and the cost of wind power energy storage equipment are reasonably reduced, and the system load can be changed in real time along with the change of wind power generation and the power consumption of the system can adapt to the wind power generation capacity.
On the basis of the above embodiment, the step 1 of obtaining wind power generation cumulative frequency distribution and a wind power generation cumulative frequency distribution curve includes:
11, calculating and converting the obtained wind data or wind power data into wind power generation frequency;
and 12, calculating and converting the wind power generation frequency into wind power generation cumulative frequency distribution, and carrying out S-shaped curve fitting on the wind power generation cumulative probability to obtain a wind power generation cumulative frequency distribution curve.
Through the steps 11 and 12, the obtained wind data or wind power data are calculated and converted into wind power generation frequency, further the wind power generation cumulative frequency distribution is calculated and converted, and S-shaped curve fitting is carried out on the wind power generation cumulative probability to obtain a wind power generation cumulative frequency distribution curve. The finally obtained wind power generation accumulation frequency distribution curve can be used for obtaining the total scale of the seawater desalination project and the scale of the seawater desalination project grouping module.
On the basis of the above embodiment, in step 2, the wind power generation accumulated frequency distribution curve determines the total scale of the seawater desalination engineering, and the method includes:
21, determining the corresponding wind power generation power when the cumulative frequency is in a first threshold range according to the wind power generation cumulative frequency distribution curve;
22, dividing the wind power generation power used as the electric power available for the seawater desalination engineering by the electric quantity required by the unit water yield in the seawater desalination process to obtain the total scale of the first seawater desalination engineering;
23, estimating according to an engineering empirical formula to obtain the total scale of the second seawater desalination engineering;
and 24, comparing the total scale of the first seawater desalination project with the total scale of the second seawater desalination project, and taking the smaller value as the total scale of the seawater desalination projects.
The engineering empirical formula is an exponential formula, and the value range of exponential parameters is 0.8-1.2.
Wherein the value range of the index parameter is 1.0-1.05.
Wherein the index parameter value is 1.016.
Wherein the first threshold range is 10% -30%.
In the coupling system, the total scale of the seawater desalination project is determined by the estimation of an engineering empirical formula and an accumulated frequency distribution curve of wind power generation. Because the total scale and the grouping module scale calculation method of the seawater desalination engineering of the embodiment of the invention adopt the reverse osmosis process, the engineering empirical formula is as follows:
water yield (m)3D) = rated power of fan (KW)kAnd obtaining the total scale of the second seawater desalination project by using an exponential formula. Wherein k is a parameter in the range of 0.8-1.2. And precisely, the value range of the index parameter is 1.0-1.05. Through experiments, the index parameter value is preferably 1.016.
And determining the corresponding wind power generation power when the accumulated frequency is in the first threshold range through a wind power generation accumulated frequency distribution curve, taking the wind power generation power as the available electric power of the seawater desalination engineering, and dividing the electric power by the electric quantity required by the unit water yield in the seawater desalination process to obtain the total scale of the first seawater desalination engineering. Experiments prove that the first threshold range is 10% -30%.
And comparing the total scale of the second seawater desalination engineering with the total scale of the first seawater desalination engineering, and taking a smaller value as the total scale of the reverse osmosis seawater desalination engineering of the wind power-seawater desalination coupling system.
After the total scale of the seawater desalination project is obtained, modular grouping is carried out. On the basis of the above embodiment, step 3 is a method for calculating the total scale of the seawater desalination engineering and the scale of the grouping modules, wherein the method for modularly grouping the seawater desalination engineering according to the wind power generation cumulative frequency distribution curve and the total scale of the seawater desalination engineering comprises the following steps:
according to the wind power generation accumulated frequency distribution curve, determining wind power generation power corresponding to the accumulated frequency greater than a second threshold, dividing the wind power generation power by the electric quantity required by the unit water yield in the seawater desalination process to obtain the minimum scale of the modules, and performing modular grouping; or
And determining wind power generation power corresponding to the accumulated frequency as a third threshold according to the wind power generation accumulated frequency distribution curve, dividing the wind power generation power by the electric quantity required by the unit water yield in the seawater desalination process, and performing modular grouping by taking the obtained module scale as each module scale.
It can thus be seen that there are two ways in which modules can be grouped. In a first mode, as shown in fig. 2, the minimum scale is determined by a wind power cumulative frequency distribution curve, that is, the wind power generation power corresponding to the cumulative frequency greater than the second threshold is determined, and the minimum scale of the modules is obtained by dividing the wind power generation power by the electric quantity required by the unit water yield in the seawater desalination process, and is subjected to modular grouping. In a second mode, as shown in fig. 3, according to the wind power generation accumulated frequency distribution curve, the wind power generation power corresponding to the accumulated frequency as the third threshold is determined, and the obtained module scale is divided by the electric quantity required by the unit water yield in the sea water desalination process, and is used as each module scale. In fig. 2, P1, P2 and P3 in fig. 3 are permeable produced water. C1, C2 and C3 are concentrated water.
And the sum of the sizes of the grouped modules after the modular grouping is not larger than the total size of the seawater desalination project.
Preferably, the second threshold is 80% and the third threshold is 50% through experiments.
And finally, optimizing the size of the grouping module. On the basis of the above embodiment, step 4 of the method for calculating the total scale and the grouping module scale of the seawater desalination engineering of another embodiment of the present invention is to optimize the grouping module scale after the seawater desalination engineering is modularly grouped, and includes:
by linear function requirement, i.e. water production scale = fmax，f(xi)=Σxi≤xTEconomic cost = gmin，g(xi)=ΣBi+Σh(xi) Obtaining the design and construction of a grouping module of the seawater desalination project;
wherein x isiFor the size of the module packet, BiThe equipment cost, h (x), corresponding to the size of each modulei) The energy storage equipment cost required for each module scale.
In the wind power-seawater desalination coupling system, the wind power cannot be completely used for the seawater desalination process, and the wind power needs to be utilized as much as possibleOn the premise that the total water production scale of the wind power-seawater desalination coupling system is as large as possible, the equipment cost of the whole seawater desalination process and the wind power energy storage equipment after grouping are reasonably reduced. By linear function requirement, i.e. water production scale = fmax，f(xi)=Σxi≤xTEconomic cost = gmin，g(xi)=ΣBi+Σh(xi) Obtaining the design and construction of a grouping module of the seawater desalination project; wherein x isiFor the size of the module packet, BiThe equipment cost, h (x), corresponding to the size of each modulei) The energy storage equipment cost required for each module scale. Reasonable design and construction of the grouping modules of the seawater desalination engineering in the wind power-seawater desalination coupling system are obtained through the optimization of the grouping module scale.
The embodiment of the invention also provides a device for calculating the total scale and the grouping module scale of the seawater desalination engineering, as shown in fig. 4, which is applied to a wind power-seawater desalination coupling system and comprises:
the first obtaining module is used for obtaining wind power generation accumulated frequency distribution and a wind power generation accumulated frequency distribution curve;
the total scale determining module is used for determining the total scale of the seawater desalination project according to the wind power generation accumulated frequency distribution curve;
the grouping module is used for modularly grouping the seawater desalination engineering according to the wind power generation accumulated frequency distribution and the total scale of the seawater desalination engineering;
and the optimization module is used for optimizing the scale of the grouping module after the seawater desalination project is subjected to modular grouping.
Wherein the first obtaining module comprises:
the first obtaining submodule is used for calculating and converting the obtained wind data or wind power data into wind power generation frequency;
and the second obtaining submodule is used for converting the wind power generation frequency calculation into wind power generation cumulative frequency distribution and carrying out S-shaped curve fitting on the wind power generation cumulative probability to obtain a wind power generation cumulative frequency distribution curve.
Wherein the total size determination module comprises:
the wind power generation power confirming module is used for confirming the corresponding wind power generation power when the cumulative frequency is in a first threshold value range according to the wind power generation cumulative frequency distribution curve;
the third obtaining submodule is used for taking the wind power generation power as the electric power available for the seawater desalination engineering and dividing the electric power by the electric quantity required by the unit water yield in the seawater desalination process to obtain the total scale of the first seawater desalination engineering;
the fourth obtaining submodule is used for obtaining the total scale of the second seawater desalination project according to the project empirical formula estimation;
and the comparison module is used for comparing the total scale of the first seawater desalination project with the total scale of the second seawater desalination project and taking the smaller value as the total scale of the seawater desalination projects.
The engineering empirical formula is an exponential formula, and the value range of exponential parameters is 0.8-1.2.
Wherein the value range of the index parameter is 1.0-1.05.
Wherein the index parameter value is 1.016.
Wherein the first threshold range is 10% -30%.
Wherein the grouping module comprises:
the first grouping submodule is used for determining the wind power generation power corresponding to the cumulative frequency greater than a second threshold value according to the wind power generation cumulative frequency distribution curve, dividing the wind power generation power by the electric quantity required by the unit water yield in the sea water desalination process to obtain the minimum scale of the modules, and performing modular grouping; or
And the second sub-module for modularly grouping the wind power generation power corresponding to the accumulated frequency as the third threshold value by dividing the wind power generation power by the electric quantity required by the unit water yield in the seawater desalination process, wherein the obtained module scale is used as each module scale.
And the sum of the sizes of the grouped modules after the modular grouping is not larger than the total size of the seawater desalination project.
Wherein the second threshold is 80% and the third threshold is 50%.
Wherein the optimization module comprises:
an optimization submodule for passing the linear function requirement, i.e. water production scale = fmax，f(xi)=Σxi≤xTEconomic cost = gmin，g(xi)=ΣBi+Σh(xi) Obtaining the design and construction of a grouping module of the seawater desalination project;
wherein x isiFor the size of the module packet, BiThe equipment cost, h (x), corresponding to the size of each modulei) The energy storage equipment cost required for each module scale.
It should be noted that the device is a device to which the above-mentioned method for calculating the total scale of the seawater desalination project and the scale of the grouping module is applied, and the implementation manner of the method for calculating the total scale of the seawater desalination project and the scale of the grouping module is applicable to the device and can achieve the same technical effect.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A method for calculating the total scale and the grouping module scale of a seawater desalination project is applied to a wind power-seawater desalination coupling system and is characterized by comprising the following steps:
acquiring wind power generation accumulated frequency distribution and a wind power generation accumulated frequency distribution curve;
determining the total scale of the seawater desalination project according to the wind power generation accumulated frequency distribution curve;
modularly grouping the seawater desalination projects according to the wind power generation accumulated frequency distribution curve and the total scale of the seawater desalination projects;
optimizing the scale of the grouped modules after modular grouping of the seawater desalination project; wherein,
the step of obtaining wind power generation accumulated frequency distribution and a wind power generation accumulated frequency distribution curve comprises the following steps: calculating and converting the obtained wind data or wind power data into wind power generation frequency; calculating and converting the wind power generation frequency into wind power generation cumulative frequency distribution, and carrying out S-shaped curve fitting on the wind power generation cumulative probability to obtain a wind power generation cumulative frequency distribution curve;
the step of determining the total scale of the seawater desalination project according to the wind power generation accumulated frequency distribution curve comprises the following steps: determining the corresponding wind power generation power when the cumulative frequency is in a first threshold range according to the wind power generation cumulative frequency distribution curve; the wind power generation power is used as the electric power available for the seawater desalination engineering, and the electric quantity required by the unit water yield in the seawater desalination process is divided to obtain the total scale of the first seawater desalination engineering; estimating according to an engineering empirical formula to obtain the total scale of the second seawater desalination engineering; and comparing the total scale of the first seawater desalination project with the total scale of the second seawater desalination project, and taking the smaller value as the total scale of the seawater desalination projects.
2. The method for calculating the total scale and the grouping module scale of the seawater desalination engineering according to claim 1, wherein the engineering empirical formula is an exponential formula, and the value range of exponential parameters is 0.8-1.2.
3. The method for calculating the total scale and the grouping module scale of the seawater desalination project according to claim 2, wherein the value range of the index parameter is 1.0-1.05.
4. The method of claim 3, wherein the index parameter is 1.016.
5. The method for calculating the total scale and the grouped module scale of the seawater desalination project according to claim 1, wherein the first threshold value ranges from 10% to 30%.
6. The method for calculating the total scale of the seawater desalination project and the scale of the grouping modules according to claim 1, wherein the step of modularly grouping the seawater desalination projects according to the wind power generation cumulative frequency distribution curve and the total scale of the seawater desalination projects comprises:
according to the wind power generation accumulated frequency distribution curve, determining wind power generation power corresponding to the accumulated frequency greater than a second threshold, dividing the wind power generation power by the electric quantity required by the unit water yield in the seawater desalination process to obtain the minimum scale of the modules, and performing modular grouping; or
And determining wind power generation power corresponding to the accumulated frequency as a third threshold according to the wind power generation accumulated frequency distribution curve, dividing the wind power generation power by the electric quantity required by the unit water yield in the seawater desalination process, and performing modular grouping by taking the obtained module scale as each module scale.
7. The method according to claim 6, wherein the total size of the grouped modules after the modular grouping is not larger than the total size of the seawater desalination project.
8. The method of claim 6, wherein the second threshold is 80% and the third threshold is 50%.
9. The method for calculating the total scale and the grouping module scale of the seawater desalination project according to claim 1, wherein the step of optimizing the grouping module scale after the seawater desalination project is modularly grouped comprises the following steps:
by means of linear functionsObtaining, i.e. water production scale ═ fmax，f(xi)＝Σxi≤xTG is the economic costmin，g(xi)＝ΣBi+Σh(xi) Obtaining the design and construction of a grouping module of the seawater desalination project;
wherein x isiFor the size of the module packet, BiThe equipment cost, h (x), corresponding to the size of each modulei) The energy storage equipment cost required for each module scale.
10. A total scale and grouping module scale calculating device for a seawater desalination project is applied to a wind power-seawater desalination coupling system and is characterized by comprising the following components:
the first obtaining module is used for obtaining wind power generation accumulated frequency distribution and a wind power generation accumulated frequency distribution curve;
the total scale determining module is used for determining the total scale of the seawater desalination project according to the wind power generation accumulated frequency distribution;
the grouping module is used for modularly grouping the seawater desalination engineering according to the wind power generation accumulated frequency distribution and the total scale of the seawater desalination engineering;
the optimization module is used for optimizing the scale of the grouping module after the seawater desalination project is subjected to modular grouping; wherein,
the first obtaining module includes: the first obtaining submodule is used for calculating and converting the obtained wind data or wind power data into wind power generation frequency; the second obtaining submodule is used for converting the wind power generation frequency calculation into wind power generation cumulative frequency distribution and carrying out S-shaped curve fitting on the wind power generation cumulative probability to obtain a wind power generation cumulative frequency distribution curve;
the total size determination module comprises: the wind power generation power confirming module is used for confirming the corresponding wind power generation power when the cumulative frequency is in a first threshold value range according to the wind power generation cumulative frequency distribution curve; the third obtaining submodule is used for taking the wind power generation power as the electric power available for the seawater desalination engineering and dividing the electric power by the electric quantity required by the unit water yield in the seawater desalination process to obtain the total scale of the first seawater desalination engineering; the fourth obtaining submodule is used for obtaining the total scale of the second seawater desalination project according to the project empirical formula estimation; and the comparison module is used for comparing the total scale of the first seawater desalination project with the total scale of the second seawater desalination project and taking the smaller value as the total scale of the seawater desalination projects.
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