CN110565594A - Method for dispatching transformer substation flood control gate - Google Patents
Method for dispatching transformer substation flood control gate Download PDFInfo
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- CN110565594A CN110565594A CN201910789193.6A CN201910789193A CN110565594A CN 110565594 A CN110565594 A CN 110565594A CN 201910789193 A CN201910789193 A CN 201910789193A CN 110565594 A CN110565594 A CN 110565594A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
- E02B1/02—Hydraulic models
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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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Abstract
the invention discloses a method for dispatching a transformer substation flood control gate, which belongs to the field of power engineering flood control engineering and comprises the following steps: establishing a rainfall runoff model and a coupling model of a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model of an area where the transformer substation is located; acquiring rainfall forecast data within a preset time, making a time sequence file, inputting the time sequence file into a rainfall runoff model, operating the coupling model by taking the rainfall runoff model as a boundary condition of the one-dimensional hydrodynamic model, and obtaining a forecast result of the one-dimensional hydrodynamic model on flood gate water level and a forecast result of the two-dimensional hydrodynamic model on the highest flood water level of the transformer substation area; and analyzing the forecast result and judging whether the transformer substation flood gate needs to be closed or not. The method and the system predict the flood possibility of the area where the transformer substation is located in advance, so that the flood gate of the transformer substation can be closed for enough time, and the loss caused by untimely closing of the flood gate is avoided.
Description
Technical Field
the invention relates to a method for dispatching a transformer substation flood control gate, and belongs to the field of power engineering flood control engineering.
Background
Due to environmental restrictions, more and more transformer substation projects are arranged in the flood area near rivers, lakes and even in the flood area, and are directly influenced by flood inundation. When the designed elevation of the transformer substation site in the flood area cannot meet the designed flood level corresponding to the corresponding flood control standard, flood control measures are needed to ensure the flood control safety of the project, and the conventional flood control measures mainly adopt the mode that a flood control wall is arranged below a wall and a flood control gate is arranged at a gate.
The current transformer substation flood gate scheduling mechanism in the flood area is as follows: after the actual flood happens in the engineering area, the transformer substation operation and maintenance personnel immediately close the flood gate to prevent the flood from entering the station area. However, the flood is steep and steep, the confluence speed is high, and when the flood actually occurs, the flood gate is scheduled to be closed, the flood is usually caused to rush into the transformer substation due to short time and no time for operating and closing the flood gate, so that a destructive flood disaster is caused.
Disclosure of Invention
the invention provides a method for dispatching a transformer substation flood gate, which can estimate the flood possibility in the region where the transformer substation is located in advance, thereby ensuring that the transformer substation flood gate has enough time to close and avoiding the loss caused by untimely closing of the flood gate.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a method for dispatching a flood gate of a transformer substation comprises the following steps: establishing a rainfall runoff model, a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model of the area where the transformer substation is located; establishing a coupling model of a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model; acquiring rainfall forecast data within a preset time; making a time sequence file according to the acquired rainfall forecast data, inputting the time sequence file into a rainfall runoff model, operating the coupling model by taking the rainfall runoff model as a boundary condition of the one-dimensional hydrodynamic model, and obtaining a forecast result of the one-dimensional hydrodynamic model on the flood gate water level and a forecast result of the two-dimensional hydrodynamic model on the highest flood level of the transformer substation area; and analyzing the forecast result of the water level of the flood diversion gate and the forecast result of the highest flood running water level of the transformer substation area, and judging whether the transformer substation flood control gate needs to be closed.
Further, the establishment of the rainfall runoff model comprises the following steps: constructing a rainfall runoff model of a rainfall runoff research area by using an MIKE rainfall runoff module; and collecting typical flood field times in a research area, and calibrating model parameters by using rainfall sequence data of a rainfall station and actual measurement flow series data of a flow station of the corresponding flood field times.
Furthermore, the rainfall runoff research area is a water collection range of hydrological stations at the upstream of the flood diversion gate of the flood area where the transformer substation is located.
Further, the establishing of the one-dimensional hydrodynamic model comprises the following steps: according to a one-dimensional hydrodynamic model, researching a regional water system diagram and river channel section data, and making a river network file and a river channel section file; according to the size of the flood diversion gate and an enabling mechanism, setting a dam break building at the flood diversion gate in the river network file, wherein the enabling condition is that the flood level at the flood diversion gate exceeds the enabling water level of the flood diversion area; and setting a rainfall runoff model as a boundary condition of the one-dimensional hydrodynamic model to obtain the one-dimensional hydrodynamic model.
Further, the one-dimensional hydrodynamic model research area is an area from a hydrological station to a flood area flood diversion gate river channel position.
Further, the establishing of the two-dimensional hydrodynamic model comprises the following steps: manufacturing a terrain file according to terrain data of a two-dimensional hydrodynamic model research area; setting parameters, and constructing a two-dimensional hydrodynamic model in a two-dimensional hydrodynamic model research area
Further, the two-dimensional hydrodynamic model research area is a flood area where the transformer substation is located.
Further, establishing the coupling model means connecting the two-dimensional hydrodynamic model and the one-dimensional hydrodynamic model in a lateral building connection manner through MIKE Flood.
further, the condition of judging whether to close the flood gate of the transformer substation is as follows: if the predicted value of the water level of the flood diversion gate does not exceed the starting water level of the flood diversion gate, the flood area does not run the flood and does not need to close the flood control gate; if the predicted value of the flood diversion gate water level exceeds the flood diversion gate starting water level, checking the forecast result of the highest flood running water level in the transformer substation area, and if the forecast result of the highest flood running water level in the transformer substation area is greater than or equal to the ground elevation of the transformer substation, closing the flood control gate in time; and if the forecast result of the highest flood level of the transformer substation area is smaller than the ground elevation of the transformer substation, closing the flood gate is not needed.
The method adopts future rainfall data, and schedules the transformer substation flood gate based on the flood gate water level forecast result and the transformer substation area flood forecast result, so that the transformer substation flood gate can be ensured to have enough time to close, and the loss caused by untimely closing of the flood gate is avoided.
Drawings
Fig. 1 is a flowchart of a method for scheduling a flood gate of a substation according to an embodiment of the present invention;
FIG. 2 shows a schematic view of a coupling connection of study areas in an embodiment of the present invention;
fig. 3 shows the one-dimensional water level forecast result of the flood diversion gate of the flood area where the transformer substation is located in 96 hours in the future, which is forecast in 2018, 9, month and 20 days in the embodiment of the present invention;
Fig. 4 shows the forecast result of the highest flood level of the transformer substation area in the 96 hours in the future, which is forecasted in 2018, 9, 20 and 8 days in the embodiment of the invention.
Detailed Description
In order to better understand the essence of the invention, the invention is further explained by taking scheduling of the M-substation flood gate in 2018, 9 and 20 as an example.
The M transformer substation is located in a certain flood area in North China, the original ground elevation of a station site is about 1.4M (1985 national elevation standard, the same below), the starting mechanism of the flood area is that the water level of a flood diversion gate reaches 7.0M, the designed flood level of the flood area is 6.0M in 100 years, the ground elevation of the station site is leveled to 2.5M for controlling the manufacturing cost and is far lower than the flood level in the flood area in 100 years, flood walls are adopted for flood control measures, flood gates are arranged on the flood control walls and the gates for ensuring the flood control safety of the station site, the wave climbing height with the cumulative frequency of 1% in 50 years and the safety superelevation are considered, and the top elevation of the flood control walls is set to be 7.5M.
According to a drainage basin water system diagram and a topographic map of a flood area, determining that a water collection range of a hydrological station (node X for short) at the upstream of a flood diversion gate of the flood area where a transformer substation is located is a rainfall runoff module research area A, taking the positions of the river from the node X to the flood diversion gate of the flood area as a one-dimensional hydrodynamic model research area B, and taking the flood area where the transformer substation is located as a two-dimensional hydrodynamic model research area C. The location of the investigation region ABC is shown in fig. 2.
A method for dispatching a flood gate of a transformer substation comprises the following specific steps as shown in figure 1,
Step 1: and establishing a rainfall runoff model of the area where the transformer substation is located. Constructing a rainfall runoff model of the research area A by utilizing an MIKE rainfall runoff module (RR module); collecting rainfall sequence data of a rainfall station and actual measurement flow series data of a flow station in a typical flood field in 7 months 2003, 6 months 2008 and 8 months 2013, and rating model parameters in a research area A, wherein the best parameters after rating are as follows: maximum water content U of surface water storage layermax=19.0mm, maximum water content L of soil layermax=150mm, slope flow coefficient CQOF =0.5, and interflow drainage constant CK1F=99h, CK in flow merging of slope flows12=13 h, slope runoff critical value TOF =0.47, interflow critical value TIF =0.01, root zone groundwater recharge critical value TG =0.45, and basal runoff convergence time CKBF=3000。
Step 2: and establishing a one-dimensional hydrodynamic model. Making a river network file and a river cross section file according to the water system diagram and the river cross section data of the research area B; according to the size of the flood diversion gate and an enabling mechanism, a dam break building is arranged at the flood diversion gate position in the river network file, the size of the dam break building is 100m long, the top elevation is 7.0m, and the enabling condition is that the flood level at the flood diversion gate exceeds 7.0 m; and setting a rainfall runoff model as a boundary condition of the one-dimensional hydrodynamic model, and constructing the one-dimensional hydrodynamic model of the one-dimensional hydrodynamic model research area B.
And step 3: and establishing a two-dimensional hydrodynamic model. And (3) according to the topographic data of the flood area, manufacturing a topographic file, setting parameters such as initial conditions and roughness coefficients, and constructing a two-dimensional hydrodynamic model in the research area C.
And 4, step 4: and establishing a coupling model of the one-dimensional hydrodynamic model and the two-dimensional hydrodynamic model. And connecting the two-dimensional hydrodynamic model and the one-dimensional hydrodynamic model in a lateral building connection mode through the MIKE Flood to form a coupling model.
Step 5: and acquiring rainfall forecast data within a preset time. : and (3) when 9, 20, 8 in 2018, downloading GFS data of 0.25 degrees or 0.25 degrees in the future for 96 hours as an initial field and a boundary field, wherein the time interval of the GFS data is 3 hours, the time interval of outputting a rainfall forecast result is 1 hour, and the grid point resolution is 3 km. The weather forecast mode is set as follows: nesting the two layers, wherein the resolution ratio is respectively 9km and 3km, and the innermost nesting range is the range of the research area A; the WRF mode inner and outer layer main physical process parameters are selected as follows: adopting a KF scheme for the cloud-accumulating convection parameterization scheme, adopting a Lin equivalent scheme for the micro physical process, adopting a YSU scheme for the atmospheric boundary layer and adopting a Noah scheme for the land surface process; the long wave radiation scheme adopts an RRTM scheme, and the short wave radiation scheme adopts a DudhiaScheme scheme.
Step 6: and (5) making a time sequence file from the grid point rainfall forecast data in the step 5 and inputting the time sequence file into the rainfall runoff model. And (4) taking the rainfall runoff model as a boundary condition of the one-dimensional hydrodynamic model and driving and operating the coupling model constructed in the step 4.
And 7: and analyzing the forecast result of the water level of the flood diversion gate and the forecast result of the highest flood running water level of the transformer substation area, and judging whether the transformer substation flood control gate needs to be closed.
and if the predicted value of the water level of the flood diversion gate does not exceed the starting water level of the flood diversion gate, the flood area does not flood and the flood gate does not need to be closed.
If the predicted value of the flood diversion gate water level exceeds the flood diversion gate starting water level, checking the forecast result of the highest flood running water level in the transformer substation area, and if the forecast result of the highest flood running water level in the transformer substation area is greater than or equal to the ground elevation of the transformer substation, closing the flood control gate in time; and if the forecast result of the highest flood level of the transformer substation area is smaller than the ground elevation of the transformer substation, closing the flood gate is not needed.
And the ground elevation of the M transformer substation is 2.5M. After the operation of the coupling model in the step 6 is finished, one-dimensional flood gate water level forecasting results of flood gates from 20 days in 9 months to 23 days in 9 months from 2018, 9 months and 20 days in 2018 are checked, as shown in fig. 3, the water level at the flood gate exceeds 7.0M, the highest flood gate water level forecasting results in 96 hours in the future of the M transformer substation area are checked, as shown in fig. 4, the highest flood gate water level in the M transformer substation area is higher than the ground elevation of the transformer substation from 35 parts at 21 days in 9 months and 23 months in 2018, and the flood gate needs to be closed in time.
it should be noted that while the invention has been described in terms of the above-mentioned embodiments, there are many other embodiments of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and it is intended that all such changes and modifications be covered by the appended claims and their equivalents.
Claims (9)
1. A method for dispatching a flood gate of a transformer substation is characterized by comprising the following steps:
Establishing a rainfall runoff model, a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model of the area where the transformer substation is located;
establishing a coupling model of a one-dimensional hydrodynamic model and a two-dimensional hydrodynamic model;
acquiring rainfall forecast data within a preset time;
Making a time sequence file according to the acquired rainfall forecast data, inputting the time sequence file into a rainfall runoff model, operating the coupling model by taking the rainfall runoff model as a boundary condition of the one-dimensional hydrodynamic model, and obtaining a forecast result of the one-dimensional hydrodynamic model on the flood gate water level and a forecast result of the two-dimensional hydrodynamic model on the highest flood level of the transformer substation area;
And analyzing the forecast result of the water level of the flood diversion gate and the forecast result of the highest flood running water level of the transformer substation area, and judging whether the transformer substation flood control gate needs to be closed.
2. A method of scheduling a substation floodgate according to claim 1, characterized in that: the establishment of the rainfall runoff model comprises the following steps:
Constructing a rainfall runoff model of a rainfall runoff research area by using an MIKE rainfall runoff module; and collecting typical flood field times in a research area, and calibrating model parameters by using rainfall sequence data of a rainfall station and actual measurement flow series data of a flow station of the corresponding flood field times.
3. A method of scheduling a substation floodgate according to claim 2, characterized in that: the rainfall runoff research area is a water collection range of hydrological stations at the upstream of flood diversion gates of the flood area where the transformer substation is located.
4. A method of scheduling a substation floodgate according to claim 1, characterized in that: the establishment of the one-dimensional hydrodynamic model comprises the following steps:
According to a one-dimensional hydrodynamic model, researching a regional water system diagram and river channel section data, and making a river network file and a river channel section file;
According to the size of the flood diversion gate and an enabling mechanism, setting a dam break building at the flood diversion gate in the river network file, wherein the enabling condition is that the flood level at the flood diversion gate exceeds the enabling water level of the flood diversion area;
and setting a rainfall runoff model as a boundary condition of the one-dimensional hydrodynamic model to obtain the one-dimensional hydrodynamic model.
5. The method of dispatching a substation floodgate according to claim 4, wherein: the one-dimensional hydrodynamic model research area is an area from a hydrological station to a flood area flood diversion gate river channel position.
6. A method of scheduling a substation floodgate according to claim 1, characterized in that: the establishment of the two-dimensional hydrodynamic model comprises the following steps: manufacturing a terrain file according to terrain data of a two-dimensional hydrodynamic model research area; and setting parameters, and constructing a two-dimensional hydrodynamic model in a two-dimensional hydrodynamic model research area.
7. The method of dispatching a substation floodgate according to claim 6, wherein: the two-dimensional hydrodynamic model research area is a flood area where the transformer substation is located.
8. a method of scheduling a substation floodgate according to claim 1, characterized in that: the step of establishing the coupling model refers to connecting the two-dimensional hydrodynamic model and the one-dimensional hydrodynamic model in a lateral building connection mode through the MIKE Flood.
9. A method of scheduling a substation floodgate according to claim 1, characterized in that:
Judging whether the condition of closing the flood gate of the transformer substation is as follows:
If the predicted value of the water level of the flood diversion gate does not exceed the starting water level of the flood diversion gate, the flood area does not run the flood and does not need to close the flood control gate;
If the predicted value of the flood diversion gate water level exceeds the flood diversion gate starting water level, checking the forecast result of the highest flood running water level in the transformer substation area, and if the forecast result of the highest flood running water level in the transformer substation area is greater than or equal to the ground elevation of the transformer substation, closing the flood control gate in time; and if the forecast result of the highest flood level of the transformer substation area is smaller than the ground elevation of the transformer substation, closing the flood gate is not needed.
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Application publication date: 20191213 |