CN108152867B - Typhoon early warning system and method for power transmission line - Google Patents
Typhoon early warning system and method for power transmission line Download PDFInfo
- Publication number
- CN108152867B CN108152867B CN201711485443.4A CN201711485443A CN108152867B CN 108152867 B CN108152867 B CN 108152867B CN 201711485443 A CN201711485443 A CN 201711485443A CN 108152867 B CN108152867 B CN 108152867B
- Authority
- CN
- China
- Prior art keywords
- typhoon
- wind
- power transmission
- transmission line
- early warning
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 35
- 239000012530 fluid Substances 0.000 claims abstract description 28
- 238000011160 research Methods 0.000 claims description 61
- 238000010586 diagram Methods 0.000 claims description 18
- 238000005259 measurement Methods 0.000 claims description 15
- 238000005516 engineering process Methods 0.000 claims description 9
- 238000011835 investigation Methods 0.000 claims description 4
- 230000010349 pulsation Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 238000004088 simulation Methods 0.000 description 17
- 238000004364 calculation method Methods 0.000 description 15
- 230000000694 effects Effects 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/02—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed
- G01W1/06—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed giving a combined indication of weather conditions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
Landscapes
- Environmental & Geological Engineering (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The invention discloses a typhoon early warning system and a typhoon early warning method for a power transmission line, which relate to the technical field of power systems and are used for carrying out fine early warning on typhoons passing through the power transmission line so as to reduce the risk of line breakage of a reverse tower of the power transmission line and provide a wind speed basis for wind disaster reverse tower design check. The typhoon early warning system comprises a typhoon data input unit, a wind field model generation unit in signal connection with the typhoon data input unit, a computational fluid dynamics unit in signal connection with the wind field model generation unit, a risk early warning unit in signal connection with the computational fluid dynamics unit, and a typhoon influence line set in signal connection with the wind field model generation unit and the risk early warning unit respectively. The typhoon early warning method utilizes the typhoon early warning system to early warn typhoons passing through the power transmission line. The typhoon early warning system and method provided by the invention are used for monitoring and early warning the wind disaster of the power grid.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a typhoon early warning system and method for a power transmission line.
Background
The transmission line is an important component of the power system, and the safety of the transmission line is directly related to national economic construction and people life, so that the normal and reliable operation of the transmission line is important. However, the transmission line has the characteristics of high tower height, large span, strong tower flexibility and the like, and the geometrical nonlinearity of the ground wire and the insulator string and the coupling effect between the tower wires are added, so that the transmission line is very sensitive to the excitation effect of typhoons, and the phenomenon of tower inversion and wire breakage is easy to occur. Therefore, the typhoon early warning is necessary for the power transmission line in typhoon multiple areas such as coastal areas, and the power supply department can be guided to conduct targeted protection work on the power transmission line in advance by carrying out typhoon early warning on the power transmission line, so that the loss caused by typhoon is reduced; in addition, the method can also provide data reference for the construction of the subsequent power transmission line for obtaining typhoon data passing through the power transmission line.
At present, a typhoon early warning method for a power transmission line mainly depends on typhoon data published by a meteorological department, but the typhoon data are usually obtained by the meteorological department by monitoring the whole typhoon condition in a large-scale area, the data are relatively general, the related typhoon area is large in scope, fine early warning on typhoons passing through the power transmission line cannot be achieved, the power transmission line in a part of areas is not protected in a targeted manner, and accordingly the power transmission line is at risk of reverse tower disconnection.
Disclosure of Invention
The invention aims to provide a typhoon early warning system and a typhoon early warning method for a power transmission line, which are used for carrying out fine early warning on typhoons passing through the power transmission line so as to reduce the risk of line breakage of a reverse tower of the power transmission line.
In order to achieve the above object, the present invention provides the following technical solutions:
a first aspect of the present invention provides a typhoon warning system, including:
The typhoon influence line set is used for storing a GIS distribution map of a geographic information system of the power transmission line, ground surface data at the power transmission line, a tower-type use condition library and an early warning grade comparison table;
A typhoon data input unit for providing typhoon data;
The wind field model generation unit is respectively connected with the typhoon influence line set and the typhoon data input unit in a signal manner, and is used for defining a research area according to the GIS distribution diagram of the power transmission line and the typhoon data, and establishing a wind field model according to ground surface data of the power transmission line of the research area, wherein the research area is a strong wind area through which typhoons pass and is provided with the power transmission line;
The computational fluid dynamics unit is in signal connection with the wind field model generation unit and is used for calculating simulated wind speeds at different positions in the wind field model;
The risk early warning unit is respectively connected with the computational fluid dynamics unit and the typhoon influence line set signal, and is used for calculating a wind speed ratio between the simulated wind speed and the designed wind speed of the tower in the tower type using condition library, searching the early warning grade comparison table according to the wind speed ratio, and determining the typhoon early warning grade of the research area.
Based on the technical scheme of the typhoon early warning system, the second aspect of the invention provides a typhoon early warning method, which comprises the following steps:
Providing a typhoon influence line set which stores a GIS distribution map of the power transmission line, ground surface data at the power transmission line, a tower-type using condition library and an early warning grade comparison table;
the typhoon data input unit provides typhoon data;
The wind field model generating unit defines a research area according to the GIS distribution diagram of the power transmission line and the typhoon data, and establishes a wind field model according to the ground surface data of the power transmission line of the research area, wherein the research area is a strong wind area through which typhoons pass and is provided with the power transmission line;
The computational fluid dynamics unit calculates simulated wind speeds at different positions in the wind field model;
The risk early warning unit is used for calculating a wind speed ratio between the simulated wind speed and the designed wind speed of the tower in the tower type using condition library, searching the early warning grade comparison table according to the wind speed ratio, and determining the typhoon early warning grade of the research area.
Compared with the prior art, the invention has the following beneficial effects:
When the typhoon early warning system provided by the embodiment of the invention is used for carrying out typhoon early warning on the power transmission line, the data provided by the typhoon observation system of the power grid company can be used for continuously checking and correcting typhoon data provided by a meteorological department, and meanwhile, the ground surface data at the power transmission line in a research area are integrated into a wind field model, so that the wind field model established by the embodiment of the invention has high resolution and simulation draft, and can basically reflect the conditions of a corridor and typhoons of the power transmission line. Moreover, the wind speed accurate calculation and typhoon early warning level of each foundation tower position in the research area are realized by utilizing the computational fluid dynamics unit and the risk early warning unit, so that the typhoon passing through the power transmission line is accurately early warned, and the inverted tower line breakage risk of the power transmission line is reduced. In addition, the simulated typhoon data are superimposed into a GIS distribution diagram of the power transmission line, and affected towers can be circled, so that important protection is carried out on the towers, and the risk of disconnection of the power transmission line due to tower inversion is further reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
FIG. 1 is a block diagram of a typhoon warning system in an embodiment of the present invention;
FIG. 2 is a schematic diagram of a wind farm model according to an embodiment of the present invention;
FIG. 3 is a flowchart of a typhoon warning method according to an embodiment of the present invention;
fig. 4 is a flowchart of step 40 in fig. 3.
Detailed Description
In order to facilitate understanding, the typhoon warning system and method for the power transmission line provided by the embodiment of the invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, the typhoon warning system provided by the embodiment of the invention includes a typhoon data input unit, a wind field model generating unit in signal connection with the typhoon data input unit, a computational fluid dynamics unit in signal connection with the wind field model generating unit, a risk warning unit in signal connection with the computational fluid dynamics unit, and a typhoon influence line set in signal connection with the wind field model generating unit and the risk warning unit respectively. The typhoon data input unit is used for providing typhoon data; the typhoon influence line set is used for storing a power transmission line geographic information system (Geographic Information System, which is abbreviated as GIS below) distribution map, ground surface data at the power transmission line, a tower type use condition library and an early warning grade comparison table. The wind field model generating unit defines a research area according to the GIS distribution diagram of the power transmission line and typhoon data provided by the typhoon data input unit, and establishes a wind field model according to ground surface data of the power transmission line of the research area. The computational fluid dynamics unit is used for calculating the simulated wind speeds at different positions in the wind field model; the risk early warning unit is used for calculating a wind speed ratio between the simulated wind speed and the designed wind speed of the tower in the tower type using condition library, searching an early warning level comparison table according to the wind speed ratio, and determining the typhoon early warning level of the research area.
In the above embodiment, the typhoon influence line set is a basic database of the typhoon early warning system, and is content integrated in the typhoon early warning system in the early stage. The typhoon influence line set comprises a power transmission line GIS distribution map in a strong wind area, ground surface data at the power transmission line, a tower type use condition library and an early warning grade comparison table, wherein the power transmission line GIS distribution map comprises power transmission line corridor channel line distribution conditions, and the power transmission line GIS distribution map is unfolded on a administrative region map according to line tower coordinates. The early warning range can be defined according to the GIS distribution diagram of the power transmission line, the typhoon position condition and the wind ring radius, so that a research area to be subjected to numerical simulation can be selected. In addition, the simulated typhoon data is superimposed into the GIS distribution diagram of the power transmission line, so that a tower influenced by typhoons can be circled. It should be noted that the line corridor refers to the transmission line itself and the space occupied under the transmission line.
The surface data at the transmission line is surface data of the land occupied immediately below the transmission line, which includes digital terrain elevation and surface coverage data. According to the embodiment of the invention, when the wind field model is built, the ground surface data of the power transmission line are integrated into the wind field model, so that the influence of the ground surface roughness on the wind speed and the wind direction can be reduced, and the simulation degree of the wind field model is improved. The tower-type using condition library comprises technical parameters of a power transmission line, including wire types, tower type, calling height, design wind speed, span and the like of the line. The pre-warning level comparison table is a table showing the corresponding relation between the pre-warning level of typhoon and the wind speed ratio, and according to the wind speed ratio, the pre-warning level of typhoon corresponding to the wind speed ratio can be searched in the pre-warning level comparison table, and the pre-warning level of typhoon generally comprises four pre-warning levels of blue, yellow, orange and red. It should be noted that the surface coverage data is the global 30 m surface vegetation building coverage.
In the above embodiment, the typhoon data input unit includes a typhoon data broadcasting system of a meteorological department for providing typhoon data. The typhoon data provided by the typhoon data broadcasting system comprises typhoon forecast data and typhoon real-time data, wherein the typhoon forecast data comprises a typhoon forecast path, a seven-level wind circle forecast radius and a ten-level wind circle forecast radius which are forecasted by a weather department, such as the typhoon forecast path, the seven-level wind circle forecast radius and the ten-level wind circle forecast radius of 24h and 48h in the future. The typhoon real-time data refers to typhoon data provided by a weather department observation station, and comprises longitude and latitude coordinates of a typhoon center position, center wind power, a seven-level wind ring actual measurement radius and a ten-level wind ring actual measurement radius, and the typhoon real-time data is updated in real time.
Typhoon data provided by the meteorological department is initial data input into a wind field model; in addition, by using typhoon data provided by a meteorological department, a strong wind area after typhoon logging can be determined, so that a research area can be defined by combining a GIS distribution diagram of a power transmission line. The study area is a strong wind area through which typhoons pass and provided with a power transmission line, is an area which needs important protection when typhoons pass, and can be specifically defined according to a GIS distribution diagram of the power transmission line, a typhoon prediction path and a typhoon circle radius.
The typhoon data input unit further comprises a typhoon data observation system built by the power grid company, wherein the typhoon data observation system is used for providing wind speed and wind direction in the research area. Specifically, the typhoon data observation system comprises a weather radar and an ultrasonic anemometer built by a power grid company, wherein the weather radar is arranged along a power transmission line and is used for carrying out short-term tour observation in a research area, and the wind speed, the wind direction and a local three-dimensional wind field from the ground to 300m height in the research area are obtained in a data inversion mode, wherein the local three-dimensional wind field can be a local three-dimensional wind field in a 4km range. The ultrasonic anemometer is mainly arranged on a typical tower of the power transmission line and is used for acquiring wind speed, wind direction and pulsation parameters of a height of 10m from the ground in the research area. The typhoon data (wind speed and wind direction) provided by the typhoon data observation system is used for correcting typhoon data provided by a meteorological department, so that wind conditions in a wind field model are basically consistent with actual wind conditions, and the established wind field model can basically and truly reflect typhoon conditions of a research area. In addition, typhoon data provided by the typhoon data observation system is also used as boundary conditions of a wind field model, and the computational fluid dynamics unit is used in calculating the simulated wind speed.
In the above embodiment, the wind field model generating unit determines the strong wind region based on the typhoon predicted path, the seven-level wind circle radius, the ten-level wind circle radius, the longitude and latitude coordinates of the typhoon center position, and the center wind force provided by the typhoon data broadcasting system of the meteorological department. After the strong wind area is determined, the wind field model generating unit determines the power transmission line positioned in the strong wind area according to the power transmission line GIS distribution diagram, and delineates the research area according to the typhoon predicted path and the typhoon wind circle radius. The predicted path of typhoon logging on the typhoon, the seven-level wind circle radius, the ten-level wind circle radius, the longitude and latitude coordinates of the center position of typhoon and the center wind force are changed with time, so that the size and the position of a research area are also changed, and are not unchanged. After the wind field model generating unit delineates the research area, a wind field model is established based on computational fluid dynamics (Computational Fluid Dynamics, hereinafter abbreviated as CFD) technology according to the surface data at the power transmission line, and the wind field model comprises a surface model in the research area.
Referring to fig. 2, fig. 2 is a wind field model established by the wind field model generating unit, where the wind field model can be regarded as a hexahedral model, the bottom surface of the hexahedral model is a surface model, and is established according to digital terrain elevation and surface coverage data in a research area, other surfaces are air, and air boundaries are calculated by taking measured wind speed and wind direction as boundaries and initial conditions; the triangle marks in fig. 2 are wind speed measurement points inside the wind farm model, and the circle marks are wind speed measurement points at the boundaries of the wind farm model. The typhoon data provided by the meteorological department is initial data input into a wind field model, typhoon data (wind speed and wind direction) provided by a typhoon data observation system of a power grid company is used for correcting typhoon data provided by the meteorological department, so that the typhoon data are consistent with measured data in the wind field model, and a wind speed distribution diagram suitable for the wind field model is built, so that the built wind field model can reflect typhoon conditions of a research area basically and truly.
The computational fluid dynamics unit is also called a CFD unit, and performs finite element grid division on the wind field model in the research area by using a finite element method and calculates simulated wind speeds corresponding to different finite element grids. The finite element mesh can be divided according to the size, precision requirements and the like of the wind field model. Illustratively, the wind field model within the investigation region is set to a 50m resolution (50 m by 50m size is set to one finite element computational grid) computational grid. The computational fluid dynamics unit performs numerical simulation on the wind field model in the research area by utilizing a grid self-cracking technology and a parallel computing technology and matching with digital terrain elevation (DEM) and global 30-meter earth surface coverage data. During simulation, wind speed and direction data provided by a meteorological department are used as initial conditions, and wind field models are continuously checked and corrected by using observation results of a power grid company in a plurality of points through self-measurement, so that a wind speed distribution diagram consistent with measured data of each wind measuring point is formed. For example, please continue to refer to fig. 2, assuming that the wind field model is a hexahedral model, the bottom surface of the hexahedral model is a ground surface model, and the other surface is air, the grids are divided by using the finite element technology in such a space, the air boundary is calculated by taking the measured wind speed and wind direction as the boundary and the initial condition, and the simulated wind speeds at different positions of the research area are obtained through calculation, so as to obtain a real-time forecast result, a 3h forecast result and a 48h forecast result: a. wind speed and direction data at each foundation tower in the research area comprises 10min average wind and real-time pulsating wind; b. and dividing the wind direction into 16 wind direction sectors, and extracting the topographic effect factors of the wind speed from the wind direction sectors to form a topographic effect factor database.
After the computational fluid dynamics unit calculates and obtains the simulated wind speeds at different positions of the research area, the risk early warning unit calculates the wind speed ratio between the simulated wind speed and the designed wind speed of the tower in the tower type using condition library according to the simulated wind speeds. After the wind speed ratio is calculated, a typhoon early warning grade comparison table stored in a typhoon influence line set is searched according to the wind speed ratio, and typhoon early warning grades of a research area are defined according to the corresponding relation between the wind speed ratio and the typhoon early warning grades, wherein the typhoon early warning grades are respectively blue, yellow, orange and red early warning. According to the typhoon early warning grade, fine early warning can be carried out on typhoons passing through the power transmission line, and the risk of line breakage of the inverted tower of the power transmission line is reduced.
The simulated wind speed obtained by calculation through the computational fluid dynamics unit is compared with the designed wind speed of the tower in the tower type use condition library, and when the simulated wind speed is greater than or equal to the designed wind speed of the tower, the inverted tower line breakage risk of the power transmission line can be determined.
In summary, when the typhoon early warning system provided by the embodiment of the invention is adopted to carry out typhoon early warning on a power transmission line, the data provided by the typhoon observation system of a power grid company can be used for continuously checking and correcting typhoon data provided by a meteorological department, and meanwhile, the ground surface data of the power transmission line in a research area are integrated into a wind field model, so that the wind field model established by the embodiment of the invention has high resolution and simulation draft, and basically can directly reflect the conditions of a corridor and typhoons of the power transmission line. Moreover, the wind speed accurate calculation and typhoon early warning level of each foundation tower position in the research area are realized by utilizing the computational fluid dynamics unit and the risk early warning unit, so that the typhoon passing through the power transmission line is accurately early warned, and the inverted tower line breakage risk of the power transmission line is reduced. In addition, the simulated typhoon data are superimposed into a GIS distribution diagram of the power transmission line, and affected towers can be circled, so that important protection is carried out on the towers, and the risk of disconnection of the power transmission line due to tower inversion is further reduced.
In the above embodiment, the obtaining of the topography factor may obtain an influence parameter of the surface data (which is a combination of DEM and surface coverage data) on the wind speed, which is an analog value. The simulation value is obtained by calculating the wind speed and the wind direction of all positions in the research area, so that preliminary early warning is carried out on the typhoons at later time according to a topographic effect factor database formed by topographic factors, and a wind speed basis is provided for wind disaster reverse tower design check. In addition, the preliminary early warning can directly multiply the measured value with the topographic effect factor to give a preliminary calculation result, and the preliminary calculation process is quick and basically accurate, so that the early warning can be performed, the time of the subsequent typhoon early warning is reduced, and the typhoon early warning cost is reduced.
Referring to fig. 3, on the basis of the foregoing embodiment, the embodiment of the present invention further provides a typhoon pre-warning method for a power transmission line, where the typhoon pre-warning method includes:
Step 10, providing a typhoon influence line set which stores a GIS distribution map of the power transmission line, ground surface data at the power transmission line, a tower-type using condition library and an early warning grade comparison table;
Step 20, typhoon data input unit provides typhoon data;
Step 30, a wind field model generating unit defines a research area according to the GIS distribution diagram of the power transmission line and typhoon data, and establishes a wind field model according to ground surface data of the power transmission line of the research area, wherein the research area is a strong wind area through which typhoons pass and is provided with the power transmission line;
step 40, calculating simulated wind speeds at different positions in the wind field model by a computational fluid dynamics unit;
And 50, a risk early warning unit is used for calculating a wind speed ratio between the simulated wind speed and the designed wind speed of the tower in the tower type using condition library, searching the early warning level comparison table according to the wind speed ratio, and determining the typhoon early warning level of the research area.
In the typhoon early warning method, the composition and functions of the typhoon influence line set, the typhoon data input unit, the wind field model generation unit, the computational fluid dynamics unit and the risk early warning unit can be referred to the corresponding description in the typhoon early warning system embodiment, and are not repeated here.
When the typhoon early warning method provided by the embodiment of the invention is used for carrying out typhoon early warning on the power transmission line, the data provided by the typhoon observation system of the power grid company can be used for continuously checking and correcting typhoon data provided by a meteorological department, and meanwhile, the ground surface data at the power transmission line in a research area are integrated into a wind field model, so that the wind field model established by the embodiment of the invention has high resolution and high simulation degree, and can basically reflect the conditions of a corridor and typhoons of the power transmission line. Moreover, the wind speed accurate calculation and typhoon early warning level of each foundation tower position in the research area are realized by utilizing the computational fluid dynamics unit and the risk early warning unit, so that the typhoon passing through the power transmission line is accurately early warned, and the inverted tower line breakage risk of the power transmission line is reduced. In addition, the simulated typhoon data are superimposed into a GIS distribution diagram of the power transmission line, and affected towers can be circled, so that important protection is carried out on the towers, and the risk of disconnection of the power transmission line due to tower inversion is further reduced.
In the typhoon early warning method, the typhoon data input unit comprises a typhoon data broadcasting system of a meteorological department and a typhoon data observation system of a power grid company, the typhoon data provided by the typhoon data input unit comprises typhoon data provided by the typhoon data broadcasting system and typhoon data provided by the typhoon data observation system, and the typhoon data provided by the typhoon data broadcasting system comprises: the method comprises the steps of typhoon predicted path, seven-level wind circle predicted radius and ten-level wind circle predicted radius, and real-time observation of longitude and latitude coordinates, central wind power, seven-level wind circle actual measured radius and ten-level wind circle actual measured radius of a typhoon central position. Typhoon data provided by typhoon data observation systems includes wind speed and wind direction within the investigation region.
In the typhoon early warning method, the typhoon data observation system comprises a weather radar and an ultrasonic anemometer which are arranged along a power transmission line; the wind speed and wind direction in the research area provided by the typhoon data observation system comprise the wind speed and wind direction from the ground to 300m height in the research area provided by the meteorological radar and a local three-dimensional wind field; and wind speed, wind direction and pulsation parameters of 10m height from the ground in the research area provided by the ultrasonic anemometer.
In the typhoon early warning method, the ground surface data at the power transmission line comprise digital terrain elevation and ground surface coverage data, and the wind field model comprises a ground model established according to the digital terrain elevation and the ground surface coverage data in the research area. The ground model is established to truly reflect the surface roughness, so that the simulation degree of the wind field model is improved, and the calculated simulation wind speed accuracy is improved.
Referring to fig. 2 and fig. 4, in the typhoon warning method, calculating the simulated wind speeds at different positions in the wind field model by the computational fluid dynamics unit specifically includes:
Step 41, assuming that the wind field model is a hexahedral model, wherein the bottom surface of the hexahedral model is a ground model, and the top surface of the hexahedral model is a gradient wind height initial surface; the grid is divided in such a space by finite element technique, and the air boundary takes the measured wind speed and wind direction as boundary and initial condition.
And 42, setting the position above the initial surface of the gradient wind height as the horizontal wind direction constraint, and setting four side surfaces between the bottom surface and the top surface of the hexahedral model as boundaries. Because the surface roughness greatly affects the wind field, the bottom surface of the model is a boundary formed by the topography elevation and the surface coverage data; the top surface of the model is a position above the height of the gradient wind and is set as a horizontal wind direction constraint; and the rest four surfaces of the model are the boundary conditions of the initial wind speed and the wind direction.
And step 43, performing finite element meshing on the boundary. For example, with continued reference to fig. 2, there are n wind speed measurement points (n 1×n2) located at each of four boundaries, where n1 is a wind speed measurement point in the vertical direction and n2 is a wind speed measurement point in the horizontal direction, and the wind speed measurement points are circular mark positions in fig. 2. Then dividing the boundary into n1 x n2 small areas, and using coordinate point data of each area as initial condition.
Step 44, calculating the simulated wind speed of each finite element mesh by using the computational fluid dynamics technology. The method is based on a CFD calculation principle, and utilizes a grid self-cracking technology and a parallel calculation technology to carry out numerical simulation and calculation on the wind field in the whole research area, so as to solve the wind field. In addition, the calculation result can be checked, and the simulation error is reduced. Specifically, referring to fig. 2, let m wind speed measurement points (m 1x m 2) be located in the wind field model, where the positions of the wind speed measurement points are the positions of triangle marks in the figure. After the calculation is completed, the calculation data of m points in the space are extracted, the calculation data are compared with the measurement data, and the simulation error is calculated.
Where alpha, beta are the weights of the magnitude and direction errors,Is the actual measurement value of the i and j points,The simulation value of the i and j points. If the simulation error meets the requirement, the simulation result is considered to be correct. If the simulation error does not meet the requirement, analyzing the error generation reason, correcting the model and then carrying out calculation again.
In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for the apparatus embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference is made to the description of the method embodiments for relevant points.
Those skilled in the art will appreciate that implementing all or part of the above-described methods in the embodiments may be accomplished by computer programs stored in a computer-readable storage medium, which when executed, may include the steps of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random-access Memory (Random Access Memory, RAM), or the like.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a typhoon early warning system of transmission line which characterized in that, typhoon early warning system includes:
The typhoon influence line set is used for storing a GIS distribution map of the power transmission line, ground surface data at the power transmission line, a tower-type using condition library and an early warning grade comparison table;
A typhoon data input unit for providing typhoon data;
the wind field model generation unit is respectively connected with the typhoon influence line set and the typhoon data input unit in a signal manner, and is used for defining a research area according to the GIS distribution diagram of the power transmission line and the typhoon data, establishing a wind field model based on a computational fluid dynamics technology according to surface data of the power transmission line of the research area, wherein the wind field model comprises a surface model in the research area, and the research area is a strong wind area through which typhoons pass and is provided with the power transmission line;
The computational fluid dynamics unit is in signal connection with the wind field model generation unit and is used for calculating simulated wind speeds at different positions in the wind field model;
The risk early warning unit is respectively connected with the computational fluid dynamics unit and the typhoon influence line set signal, and is used for calculating a wind speed ratio between the simulated wind speed and a designed wind speed of a tower in the tower type use condition library, searching the early warning grade comparison table according to the wind speed ratio and determining typhoon early warning grade of the research area;
the typhoon data input unit comprises a typhoon data broadcasting system of a meteorological department, wherein the typhoon data broadcasting system is used for providing a typhoon prediction path, a seven-level wind circle prediction radius and a ten-level wind circle prediction radius, as well as longitude and latitude coordinates, central wind power, seven-level wind circle actual measurement radius and ten-level wind circle actual measurement radius of a typhoon center position observed in real time.
2. The typhoon warning system for power transmission lines according to claim 1, wherein the typhoon data input unit comprises a typhoon data observation system of a power grid company, wherein,
The typhoon data observation system is used for providing wind speed and wind direction in the research area.
3. The typhoon warning system for power transmission lines according to claim 2, wherein the typhoon data observation system comprises a weather radar disposed along the power transmission line and an ultrasonic anemometer disposed on a tower, wherein,
The meteorological radar is used for acquiring wind speed, wind direction and local three-dimensional wind field from the ground to 300m in the research area;
the ultrasonic anemometer is used for acquiring wind speed, wind direction and pulsation parameters of a height of 10m from the ground in the research area.
4. A typhoon pre-warning method for a power transmission line, applied to the typhoon pre-warning system of the power transmission line according to any one of claims 1 to 3, characterized in that the typhoon pre-warning method comprises:
Providing a typhoon influence line set which stores a GIS distribution map of the power transmission line, ground surface data at the power transmission line, a tower-type using condition library and an early warning grade comparison table;
the typhoon data input unit provides typhoon data;
The wind field model generating unit defines a research area according to the GIS distribution diagram of the power transmission line and the typhoon data, and establishes a wind field model according to the ground surface data of the power transmission line of the research area, wherein the research area is a strong wind area through which typhoons pass and is provided with the power transmission line;
The computational fluid dynamics unit calculates simulated wind speeds at different positions in the wind field model;
The risk early warning unit is used for calculating a wind speed ratio between the simulated wind speed and the designed wind speed of the tower in the tower type using condition library, searching the early warning grade comparison table according to the wind speed ratio, and determining the typhoon early warning grade of the research area.
5. The typhoon pre-warning method for power transmission lines according to claim 4, wherein the typhoon data input unit comprises a typhoon data broadcasting system of a meteorological department and a typhoon data observing system of a power grid company; the typhoon data provided by the typhoon data input unit comprises:
the typhoon data broadcasting system provides a typhoon predicted path, a seven-level wind circle predicted radius and a ten-level wind circle predicted radius, as well as longitude and latitude coordinates, central wind power, a seven-level wind circle measured radius and a ten-level wind circle measured radius of a typhoon central position observed in real time;
the typhoon data observation system provides wind speed and wind direction in the investigation region.
6. The typhoon pre-warning method for power transmission lines according to claim 5, wherein the typhoon data observation system comprises a weather radar and an ultrasonic anemometer arranged along the power transmission line;
The wind speed and wind direction in the research area provided by the typhoon data observation system comprises:
the wind speed and the wind direction of the ground to 300m height in the research area provided by the meteorological radar and the local three-dimensional wind field;
wind speed, wind direction and pulsation parameters of 10m height from the ground in the research area provided by the ultrasonic anemometer.
7. The method of claim 4, wherein the surface data at the power transmission line includes digital terrain elevation and surface coverage data, and the wind farm model includes a ground model established from the digital terrain elevation and surface coverage data within the investigation region.
8. The typhoon warning method for power transmission lines according to claim 4, wherein calculating simulated wind speeds at different positions in the wind field model by the computational fluid dynamics unit comprises:
assuming that the wind field model is a hexahedral model, wherein the bottom surface of the hexahedral model is a ground model, and the top surface of the hexahedral model is a gradient wind height initial surface;
setting the position above the initial gradient wind height surface as a horizontal wind direction constraint, and setting four side surfaces between the bottom surface and the top surface of the hexahedral model as boundaries;
Performing finite element meshing on the boundary;
and respectively calculating the simulated wind speed of each finite element grid by using a computational fluid dynamics technology.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485443.4A CN108152867B (en) | 2017-12-29 | 2017-12-29 | Typhoon early warning system and method for power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711485443.4A CN108152867B (en) | 2017-12-29 | 2017-12-29 | Typhoon early warning system and method for power transmission line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108152867A CN108152867A (en) | 2018-06-12 |
| CN108152867B true CN108152867B (en) | 2024-07-12 |
Family
ID=62460106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711485443.4A Active CN108152867B (en) | 2017-12-29 | 2017-12-29 | Typhoon early warning system and method for power transmission line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108152867B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109165476A (en) * | 2018-10-16 | 2019-01-08 | 广东电网有限责任公司 | A kind of modeling method and simulation of wind method of modularization wind-field model |
| CN109522599A (en) * | 2018-10-16 | 2019-03-26 | 国电南瑞科技股份有限公司 | Transmission line of electricity catastrophic failure method for early warning caused by a kind of typhoon |
| CN109767124B (en) * | 2019-01-14 | 2021-02-26 | 中国铁塔股份有限公司 | Typhoon early warning method and device for base station |
| CN110298101A (en) * | 2019-06-24 | 2019-10-01 | 国网浙江省电力有限公司电力科学研究院 | A kind of transmission line of electricity wind-excited responese finite element method coupling wind system |
| CN110501519A (en) * | 2019-07-15 | 2019-11-26 | 武汉纳思***技术有限公司 | One kind is based on power transmission line wind calamity linkage perception monitoring system |
| CN112507633B (en) * | 2020-12-03 | 2022-02-15 | 广东电网有限责任公司电力科学研究院 | Method and system for predicting and early warning wind speed of transmission tower |
| CN113111611B (en) * | 2021-05-12 | 2024-08-23 | 华北电力大学 | Typhoon disaster prediction method, typhoon disaster prediction device and storage medium |
| CN115290923B (en) * | 2022-10-08 | 2023-01-20 | 广东电网有限责任公司中山供电局 | Method, system, equipment and medium for monitoring wind speed along power transmission line |
| CN118229094A (en) * | 2024-05-23 | 2024-06-21 | 国网辽宁省电力有限公司抚顺供电公司 | Power grid security risk early warning method and system based on time-varying fault rate function |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955609A (en) * | 2014-04-25 | 2014-07-30 | 国家电网公司 | Automatic anticipated fault set generation method based on typhoon model |
| CN207636797U (en) * | 2017-12-29 | 2018-07-20 | 南方电网科学研究院有限责任公司 | Typhoon early warning system of power transmission line |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102628876B (en) * | 2012-02-13 | 2013-07-31 | 甘肃省电力公司风电技术中心 | Ultra-short term prediction method comprising real-time upstream and downstream effect monitoring |
| CN103246936A (en) * | 2013-04-24 | 2013-08-14 | 广东电网公司中山供电局 | System and method for pre-warning of typhoon risks of overhead transmission lines of grid |
| CN104951993A (en) * | 2014-09-04 | 2015-09-30 | 国网山东省电力公司应急管理中心 | Comprehensive monitoring and early warning system based on meteorology and power grid GIS and method thereof |
| CN105184492B (en) * | 2015-09-10 | 2019-04-26 | 国网福建省电力有限公司 | Power grid based on three-dimensional digital earth resists typhoon disaster simulation analysis early warning system |
| CN105427187B (en) * | 2015-11-25 | 2019-11-08 | 广东电网有限责任公司湛江供电局 | Distribution line wind loading rating appraisal procedure and system |
| CN106405684A (en) * | 2016-10-28 | 2017-02-15 | 广西电网有限责任公司电力科学研究院 | Typhoon early warning system based on power grid geographical information |
| CN106570621A (en) * | 2016-11-02 | 2017-04-19 | 广西电网有限责任公司电力科学研究院 | Typhoon risk early warning method for electric power transmission and distribution system |
| CN106651131A (en) * | 2016-11-16 | 2017-05-10 | 海南电力技术研究院 | Power-transmission-line anti-typhoon early warning method and system thereof |
-
2017
- 2017-12-29 CN CN201711485443.4A patent/CN108152867B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955609A (en) * | 2014-04-25 | 2014-07-30 | 国家电网公司 | Automatic anticipated fault set generation method based on typhoon model |
| CN207636797U (en) * | 2017-12-29 | 2018-07-20 | 南方电网科学研究院有限责任公司 | Typhoon early warning system of power transmission line |
Non-Patent Citations (1)
| Title |
|---|
| 架空输电线路大风灾害预警方法研究;翁世杰;中国优秀硕士学位论文全文数据库 工程科技II辑;第8-20页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108152867A (en) | 2018-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108152867B (en) | Typhoon early warning system and method for power transmission line | |
| CN111427100B (en) | Typhoon center positioning method and device and typhoon path generation method | |
| US11168667B2 (en) | Method and device for calculating power generation of wind farm | |
| CN106023530B (en) | A kind of heavy rain type diluted debris flow monitoring and prediction method for early warning | |
| CN105095589B (en) | A kind of mountain area power grid wind area is distributed drawing drawing method | |
| CN108763825B (en) | Numerical simulation method for simulating wind field of complex terrain | |
| CN104834017A (en) | Positioning method for hazardous gas leakage diffusion accident source | |
| CN104331621A (en) | Wind resource computation method | |
| CN107153997A (en) | A kind of complicated landform Wind turbines microcosmic structure method | |
| CN103673960A (en) | Method and device for predicating icing state of power transmission line | |
| CN104182594A (en) | Method for drawing power system wind area graph | |
| CN107169645A (en) | A kind of transmission line malfunction probability online evaluation method of meter and Rainfall Disaster influence | |
| CN110134907B (en) | Rainfall missing data filling method and system and electronic equipment | |
| CN116205541B (en) | Method and device for evaluating influence of local pollution source on environmental air quality | |
| CN105868443B (en) | Construction method of micro-terrain microclimate element field | |
| CN112700349B (en) | Method and device for selecting site of anemometer tower | |
| CN103256914A (en) | Method and system for calculating inundated areas of warp land dam based on DEM | |
| CN111666725A (en) | Anemometer tower planning and site selection method and system suitable for wind power plant with non-complex terrain | |
| CN113358040B (en) | Method and device for acquiring icing thickness of power transmission line and computer equipment | |
| CN104133972B (en) | Method for partially correcting power grid ice region distributing diagram based on microtopography | |
| CN107784408A (en) | Wind resource assessment method, device and system based on terrain classification | |
| CN113743027A (en) | Method and device for drawing wind resource map based on CFD technology | |
| CN207636797U (en) | Typhoon early warning system of power transmission line | |
| CN114509777A (en) | Electric transmission project entity acceptance method based on Cesium platform | |
| CN109408604B (en) | Grid processing method, device and system for data of weather factors associated with power transmission line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210802 Address after: 510663 3 building, 3, 4, 5 and J1 building, 11 building, No. 11, Ke Xiang Road, Luogang District Science City, Guangzhou, Guangdong. Applicant after: China South Power Grid International Co.,Ltd. Address before: 510663 3 building, 3, 4, 5 and J1 building, 11 building, No. 11, Ke Xiang Road, Luogang District Science City, Guangzhou, Guangdong. Applicant before: China South Power Grid International Co.,Ltd. Applicant before: POWER GRID TECHNOLOGY RESEARCH CENTER. CHINA SOUTHERN POWER GRID |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |