CN114089793A - Water regulating method utilizing spontaneous wind power and lake storage regulation - Google Patents
Water regulating method utilizing spontaneous wind power and lake storage regulation Download PDFInfo
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- CN114089793A CN114089793A CN202111384206.5A CN202111384206A CN114089793A CN 114089793 A CN114089793 A CN 114089793A CN 202111384206 A CN202111384206 A CN 202111384206A CN 114089793 A CN114089793 A CN 114089793A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 20
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 15
- 238000005086 pumping Methods 0.000 claims abstract description 27
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D9/00—Level control, e.g. controlling quantity of material stored in vessel
- G05D9/12—Level control, e.g. controlling quantity of material stored in vessel characterised by the use of electric means
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/20—Movable barrages; Lock or dry-dock gates
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B3/00—Methods or installations for obtaining or collecting drinking water or tap water
- E03B3/04—Methods or installations for obtaining or collecting drinking water or tap water from surface water
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B5/00—Use of pumping plants or installations; Layouts thereof
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Abstract
The invention belongs to the technical field of water transfer systems, and particularly relates to a water transfer method utilizing spontaneous wind power and lake storage, which comprises the steps of obtaining the flow Q of a slave water transfer gate and the current water level of a lake in the future moment; judging whether the current water level of the lake is greater than the maximum water level of the lake, if so, acquiring the pumping flow of a current pump station, and changing the pumping flow of the pump station according to the change of the wind power input power; judging whether the pumping flow of the current pump station is larger than the flow flowing out from the water regulating gate, and if so, controlling the drainage of the drainage gate until the water level in the lake reaches the water level at the previous moment; and adjusting the opening of the water regulating gate according to the current water level of the lake until the water regulating flow is stabilized at a flow Q. According to the method, the wind power is connected into the pump station, the fluctuation of the wind power is not considered, and the spontaneous wind power can be used to the maximum extent, so that the power consumption cost is reduced, and the problem of high cost caused by the use of a large power grid power supply is solved.
Description
Technical Field
The invention belongs to the technical field of water transfer systems, and particularly relates to a water transfer method utilizing spontaneous wind power and lake storage.
Background
After water is led to the south-to-north water transfer east-line project at present, multi-water-source supply patterns such as south-to-north water transfer, yellow river water, local surface water and underground water are formed in various places of water receiving areas, and the price difference of raw water of various water sources is large. Compared with other water sources, the water source for regulating the water in the south water and the north water has relatively higher price, does not have price advantage, and seriously influences the water use enthusiasm of a water receiving area.
At present, the common method for reducing the expenditure of electric charges of the east line engineering pump station comprises the following steps: the method has the advantages that the electromechanical operation efficiency of the pump station is improved, the cascade scheduling mode is optimized, the influence of peak-valley electricity price is considered, the cost of the south-to-north water transfer is reduced by adopting the method, and a certain effect is achieved at present. However, the electricity cost for further reducing the south-to-north water transfer is difficult based on the above technologies, and the main reasons are as follows: firstly, the space for further improving the operation efficiency of the electromechanical system of the existing pump station is limited; secondly, optimized scheduling of the cascade pump station is already applied to services, but the effect is limited, and the essence of high engineering power consumption cost is difficult to be fundamentally turned; and thirdly, the pump station needs to operate all weather in most cases in the water transfer period, and the peak-valley electricity price has limited practical significance for reducing the electricity expense.
Disclosure of Invention
The invention discloses a water transfer method utilizing spontaneous wind power and lake storage, which aims to solve the problems that the existing water transfer method in the background art is high in cost and difficult to reduce the cost.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a water transfer method utilizing spontaneous wind power and lake storage is characterized in that a wind driven generator is connected to a pump station, and wind power is adopted for operation of the pump station; however, the stability problem of wind power generation exists, on the premise of reducing the water transfer cost, the invention particularly provides a water transfer method aiming at the condition that the stability problem of the wind power generation exists, and on the premise of solving the water transfer cost, the invention also solves the problem of unstable wind power generation, so that the output power of a pump station is unstable, and further the output flow of the pump station is unstable; in order to solve the above problems, the steps of the present invention are as follows:
a water regulating method utilizing spontaneous wind power and lake regulation and storage comprises the following steps:
step 1: acquiring the flow flowing out of the water transfer gate at a future moment according to the water transfer plan;
step 2: acquiring the current water level of the lake;
and step 3: judging whether the current water level of the lake is greater than the maximum water level which can be reached by the lake or not, and if so, executing the step 4; if not, executing step 7;
and 4, step 4: acquiring the pumping flow of a current pump station, wherein the pumping flow of the pump station changes the pumping flow according to the change of wind power input power;
and 5: judging whether the pumping flow of the current pump station is larger than the flow flowing out of the water regulating gate or not, and if so, executing the step 6; if not, executing step 7;
step 6: controlling the drainage of the drainage gate until the water level in the lake reaches the water level at the previous moment;
and 7: and (3) adjusting the opening of the water regulating gate according to the current water level of the lake until the water regulating flow is stabilized at the flow obtained in the step (1).
According to the invention, wind power is connected into the pump station, and through the steps, the fluctuation of the wind power is not considered, and the spontaneous wind power can be used to the maximum extent, so that the power consumption cost is reduced, and the problem of high cost caused by using a large power grid power supply is avoided.
Preferably, said one instant is equal to fifteen minutes.
Preferably, the variation of the pumping flow rate of the pumping station in the step 4 is determined according to the following formula:
ΔVi＝Vi-Vi-1
in the formula:
for the inflow of lake at the moment i (unit: m)3/s)；
Pumping flow (unit: m) for pump station at moment i3S); t is the time period duration (unit: second); Δ ViIs the variation (unit: m) of the water storage capacity of the lake at the moment i relative to the moment i-13)；PiThe shaft power (unit: kilowatt) of the water pump at the moment i;
is the efficiency of the pump; hiThe pumping lift (unit: m) of the pump at the moment i;
the conversion coefficient of the output power of the fan and the shaft power of the water pump is a constant; wiFor the output power of the fan at the moment i (unit: kilowatt)
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that: 1. compared with the method for reducing the cost in the background technology, the method has smaller implementation difficulty; and because the lake regulation is adopted, the stability of outflow can be ensured through the control of the gate, so that the future wind power does not need to be subjected to refined forecast, the implementation difficulty is reduced, and the popularization value is higher.
2. According to the invention, wind power is connected into the pump station, and the step of the invention does not need to consider the fluctuation of the wind power, and the spontaneous wind power can be used to the maximum extent, so that the power consumption cost is reduced, and the problem of high cost caused by using a large power grid power supply is avoided.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of the system of the present invention.
FIG. 2 is a schematic flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. The components of embodiments of the present application, generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
Referring to the attached drawings 1 and 2, a water regulation method utilizing spontaneous wind power and lake storage comprises the following steps:
step 1: acquiring the flow Q flowing out of the water regulating gate in the next fifteen minutes according to the water regulating plan;
step 2: acquiring the current water level Z of the lake;
and step 3: judging whether the current water level Z of the lake is greater than the maximum water level Zmax which can be reached by the lake or not, and if so, executing the step 4; if not, executing step 7;
and 4, step 4: acquiring the pumping flow Qe of a current pump station, wherein the pumping flow of the pump station changes the pumping flow according to the change of wind power input power; the change of the pumping flow of the pumping station is determined according to the following formula:
ΔVi＝Vi-Vi-1
qe is equal to
In the formula:
for the inflow of lake at the moment i (unit: m)3/s)；
Pumping flow (unit: m) for pump station at moment i3S); t is the time period duration (unit: second); Δ ViIs the variation (unit: m) of the water storage capacity of the lake at the moment i relative to the moment i-13)；PiThe shaft power (unit: kilowatt) of the water pump at the moment i;
is the efficiency of the pump; hiThe pumping head (unit: m) of the pump at the moment i;
the conversion coefficient of the output power of the fan and the shaft power of the water pump is a constant; w is a group ofiFor the output power of the fan at the moment i (unit: kilowatt)
And 5: judging whether the pumping flow Qe of the current pump station is larger than the flow Q flowing out of the water transfer gate, and if so, executing the step 6; if not, executing step 7;
step 6: controlling the drainage of the drainage gate until the water level in the lake reaches the last fifteen minutes water level; the last fifteen minutes is the current last fifteen minutes.
And 7: and (3) adjusting the opening of the water regulating gate according to the current water level of the lake until the water regulating flow is stabilized at the flow Q obtained in the step (1).
According to the invention, wind power is connected into the pump station, and through the steps, the fluctuation of the wind power is not considered, and the spontaneous wind power can be used to the maximum extent, so that the power consumption cost is reduced, and the problem of high cost caused by using a large power grid power supply is avoided.
According to the steps described in the technical scheme of the invention, a certain pump station in the water transfer project is selected to carry out the embodiment, the time range of the embodiment is 90 minutes in the future, and the implementation effects of the patent are shown in table 1:
TABLE 1
If the method of the patent is not introduced, the power consumption of a pump station for 90 minutes is 0.25 x (1000+1100+1300+900+900+1000) ═ 1550 degrees electricity, and if the method is not introduced, the 1550 degrees electricity needs to be completely taken from a large power grid; after the patent method is introduced, the electricity is actually taken from a large power grid to be 0-degree electricity; after the patent method is introduced, compared with the method without the patent method, the electric quantity of a large power grid is reduced to 1550 DEG; the cost of the pump station for taking the first-degree electricity of the large power grid is assumed to be 0.8 yuan, and the cost of the wind power self-generation is about 0.20 yuan/degree electricity because a storage battery device is not additionally arranged, so that the water saving and transferring cost is (0.8-0.2) × 1550 yuan which is 930 yuan.
Therefore, the water and electricity regulating cost is greatly reduced after the water regulating method is adopted.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (3)
1. A water regulating method utilizing spontaneous wind power and lake regulation and storage is characterized by comprising the following steps:
step 1: acquiring the flow flowing out of the water transfer gate at a future moment according to the water transfer plan;
step 2: acquiring the current water level of the lake;
and step 3: judging whether the current water level of the lake is greater than the maximum water level which can be reached by the lake or not, and if so, executing the step 4; if not, executing step 7;
and 4, step 4: acquiring the pumping flow of a current pump station, wherein the pumping flow of the pump station changes the pumping flow according to the change of wind power input power;
and 5: judging whether the pumping flow of the current pump station is larger than the flow flowing out of the water regulating gate or not, and if so, executing the step 6; if not, executing step 7;
and 6: controlling the drainage of the drainage gate until the water level in the lake reaches the water level at the previous moment;
and 7: and (3) adjusting the opening of the water regulating gate according to the current water level of the lake until the water regulating flow is stabilized at the flow obtained in the step (1).
2. The water regulation method utilizing spontaneous wind power and lake regulation and storage according to claim 1, wherein the one time is equal to fifteen minutes.
3. The water regulation method utilizing spontaneous wind generation and lake regulation and storage according to claim 1, wherein the variation of the pumping flow of the pumping station in the step 4 is determined according to the following formula:
ΔVi＝Vi-Vi-1
in the formula:
for the inflow of lake at the moment i (unit: m)3/s)；
Pumping flow (unit: m) for pump station at time i3S); t is the time period duration (unit: second); Δ ViIs the variation (unit: m) of the water storage capacity of the lake at the moment i relative to the moment i-13)；PiThe shaft power (unit: kilowatt) of the water pump at the moment i;
is the efficiency of the pump; hiThe pumping head (unit: m) of the pump at the moment i;
the conversion coefficient of the output power of the fan and the shaft power of the water pump is a constant; w is a group ofiThe output power (unit: kilowatt) of the fan at the moment i.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115951723A (en) * | 2022-12-26 | 2023-04-11 | 浙江南自建设集团有限公司 | Method and device for controlling brake pump, computer equipment and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115951723A (en) * | 2022-12-26 | 2023-04-11 | 浙江南自建设集团有限公司 | Method and device for controlling brake pump, computer equipment and storage medium |
| CN115951723B (en) * | 2022-12-26 | 2023-08-29 | 浙江南自建设集团有限公司 | Gate pump control method and device, computer equipment and storage medium |
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