CN110632680B - Power transmission line micro-area wind speed estimation method and system - Google Patents
Power transmission line micro-area wind speed estimation method and system Download PDFInfo
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Abstract
The invention provides a method for estimating wind speed of a micro-area of a power transmission line. The method comprises the following steps: constructing a three-dimensional wind field based on the obtained weather radar monitoring data and the historical monitoring data of the microclimate monitoring system; and correcting the weather radar monitoring data by using the wind measuring data in the historical monitoring data of the microclimate monitoring system based on the three-dimensional wind field and a preset wind profile equation to obtain the wind speed information of any elevation of the measured point in the micro area of the power transmission line. According to the technical scheme provided by the invention, based on historical wind measurement data of the microclimate monitoring device of the power transmission line, a high-rise wind speed inversion product of the Doppler radar is corrected downwards by using a statistical method, so that wind speed change information of the elevation where the power transmission line is located is obtained, and necessary real-time wind speed monitoring information is provided for the research of typhoon prevention and emergency measures of a power grid.
Description
Technical Field
The invention relates to the technical field of power grid disaster prevention, in particular to a method and a system for estimating wind speed of a micro-area of a power transmission line.
Background
Electric power is an important basic industry and public utilities of the national civilization, and the position of the electric power in the economic society and the people's life is more and more important. The electric power system is a typical complex large system related to links of sending, outputting, changing, matching, using and the like, presents nonlinear, high-dimensional, time-varying and multi-layer dynamic characteristics, and is closely related to the meteorological environment in safe operation. With the rapid development of electric power, the scale of the power grid is rapidly enlarged, the influence of meteorological factors such as typhoon, rainstorm, thunder and the like on the safe operation of the power grid is larger and larger, and the establishment of a power grid safety early warning mechanism is not slow enough.
The strong wind impact is one of the primary factors of the power grid suffering from typhoon. At present, due to the problems of cost factors, professional span and the like, a power transmission network is lack of strong wind disaster real-time monitoring capability to different degrees, and due to the lack of effective strong wind monitoring means and key data sources, the wind disaster coping capability and the accident emergency response capability have certain bottlenecks.
At present, the Doppler weather radar has the inversion and analysis capability of a large-range wind field three-dimensional structure, and the current technology can realize the wind field inversion of 1km multiplied by 1km horizontal resolution and 6-minute time resolution. The advantages enable the radar product and the high-grade application thereof to be widely applied to the industries of meteorology, aviation and the like.
However, as known from the operating principle of the doppler weather radar, the construction site of the radar station is often required to be located at a higher position of a city, and no interference sources such as shelters, electromagnetic radiation and the like exist around the radar station. Thus, atmospheric conditions that are directly monitored by a typical radar often cannot cover the near-ground layers of interest to the power grid.
Taking an area which is easy to be attacked by typhoon disasters as an example, most of the known radar stations are arranged on mountains or hills near the sea and limited by the lowest elevation angle of radar scanning, and the lowest layer of the radar visual range is not lower than the altitude plane where the radar stations are located, so that the fact that various currently-given radar monitoring and inversion products (particularly wind field analysis, wind speed inversion and the like) are obviously different from the altitude of a power transmission line can be inferred, and the obvious difference in the vertical height can not be directly applied to strong wind disaster analysis of a power transmission network and the power transmission line.
Disclosure of Invention
Aiming at the problem that the elevation shown by a Doppler radar wind speed inversion product is not matched with the height of the power grid power transmission line, the invention provides near-ground wind speed change information facing the typhoon prevention of the power grid.
The technical scheme provided by the invention is as follows:
a method for estimating wind speed of a micro-area of a power transmission line comprises the following steps:
acquiring weather radar monitoring data and microclimate monitoring system historical monitoring data; wherein the microclimate monitoring system historical monitoring data comprises anemometry data;
constructing a three-dimensional wind field based on the weather radar monitoring data and the micro-meteorological monitoring system historical monitoring data;
and correcting the weather radar monitoring data by using the wind measuring data based on the three-dimensional wind field and a preset wind profile equation to obtain wind speed information of any elevation of the measured point in the micro area of the power transmission line.
Preferably, the method for constructing a three-dimensional wind field based on the weather radar monitoring data and the microclimate monitoring system historical monitoring data includes:
processing the weather radar monitoring data and the micro-meteorological monitoring system historical monitoring data according to a preset rule;
constructing a radar three-dimensional wind field according to the processed weather radar monitoring data to obtain a wind speed value of any grid point in the radar three-dimensional wind field;
and supplementing the processed historical monitoring data of the microclimate monitoring system into a radar three-dimensional wind field to obtain the three-dimensional wind field.
Further, the predetermined rule of the data processing includes:
the microclimate monitoring system historical monitoring data further comprises: longitude and latitude and altitude information of a microclimate monitoring system station;
acquiring longitude and latitude and altitude information of a radar station and a microclimate monitoring system station;
carrying out data timing and time consistency check on weather radar monitoring data and micro-meteorological monitoring system historical monitoring data;
and analyzing the time resolution difference between the Doppler weather radar monitoring data subjected to the time consistency check and the historical monitoring data of the microclimate monitoring system, when the time resolution difference exists, obtaining two synchronous time sequences by adopting a sliding average method of sampling values, and acquiring the wind measuring data of the microclimate monitoring system according to the time resolution of the synchronous time sequences.
Further, the method for constructing the radar three-dimensional wind field according to the processed weather radar monitoring data to obtain the wind speed value of any grid point in the radar three-dimensional wind field includes:
interpolating the processed Doppler weather radar monitoring data from a polar coordinate to an equal height surface under a Cartesian coordinate system by adopting a bilinear interpolation method;
in the Cartesian coordinate system after interpolation, taking the position of a radar station as an origin, and establishing a radar three-dimensional wind field according to a set horizontal radius, a set horizontal resolution, a set vertical height and a set vertical resolution;
and obtaining any lattice point wind speed value corresponding to the longitude value, the latitude value, the altitude and the time identification of each lattice point in a two-dimensional horizontal lattice distance grid divided according to the set horizontal resolution under different altitudes based on the set vertical resolution in the radar three-dimensional wind field.
Further, supplementing the processed historical monitoring data of the microclimate monitoring system into a radar three-dimensional wind field to obtain a three-dimensional wind field, including:
the microclimate monitoring system historical monitoring data further comprises: longitude and latitude and altitude information of a microclimate monitoring system station;
positioning the microclimate monitoring system station in the grid of the radar three-dimensional wind field according to the longitude and latitude and altitude information of the microclimate monitoring system station;
and marking sites of the microclimate monitoring system in the grid, and recording wind measuring data of the microclimate monitoring system in the grid to obtain a three-dimensional wind field.
Further, the process of establishing the preset wind profile equation includes:
taking longitude and latitude and altitude information of a measured point as a reference, and acquiring the wind speed of a grid point which is closest to the measured point in each layer of a radar three-dimensional wind field;
according to the wind speed of grid points in each layer of the radar three-dimensional wind field, which are closest to the position of the measured point, calculating to obtain wind speed values of different altitudes in each layer corresponding to the vertical resolution of the radar three-dimensional wind field in the longitude and latitude where the measured point is located by adopting a bilinear difference method;
and obtaining a wind profile equation of the wind speed of the measured point in the longitude and latitude along with the change of the altitude by adopting a least square method according to the wind measuring data of the microclimate monitoring system in the three-dimensional wind field and the wind speed values of different altitudes in each layer corresponding to the vertical resolution of the radar three-dimensional wind field in the longitude and latitude where the measured point is located.
Further, the method for establishing the wind profile equation based on the three-dimensional wind field and preset wind profiles corrects the weather radar monitoring data by using the wind measurement data to obtain wind speed information of any elevation of measured points in the micro area of the power transmission line, and includes:
judging whether the power transmission line microclimate monitoring system exists in the grid or not according to the marking condition of the microclimate monitoring system site in the three-dimensional wind field grid where the power transmission line micro-area measured point is located;
when the power transmission line microclimate monitoring system exists in the grid, a wind profile equation of the wind speed on the measured point along with the height is established according to a preset wind profile equation establishing method, and the information of the change of the wind speed on the measured point along with the height is calculated according to the wind profile equation;
when the microclimate monitoring system of the power transmission line does not exist in the grid, a wind profile equation of the wind speed of the adjacent grid along with the height is established according to a preset wind profile equation establishing method, the wind profile equation of the grid is replaced by the mean value of the wind profile equations of the adjacent grid, and the information of the change of the wind speed of the measured point along with the height is calculated according to the wind profile equation.
A transmission line micro-area wind speed estimation system, the system comprising:
the data acquisition module is used for acquiring weather radar monitoring data and microclimate monitoring system historical monitoring data;
the three-dimensional wind field module is used for constructing a three-dimensional wind field based on weather radar monitoring data and microclimate monitoring system historical monitoring data;
and the wind speed correction module is used for correcting the weather radar monitoring data by using the wind measurement data based on the three-dimensional wind field and a preset wind profile equation to obtain wind speed information of any elevation of a measured point in a micro area of the power transmission line.
The three-dimensional wind field module comprises: the system comprises a data processing unit and a three-dimensional wind field construction unit;
the data processing unit is used for carrying out time correction and time consistency check on the weather radar monitoring data and the micro-meteorological monitoring system historical monitoring data, carrying out time distribution rate matching and obtaining the wind measuring data of the micro-meteorological monitoring system;
and the three-dimensional wind field construction unit is used for constructing a radar three-dimensional wind field according to the weather radar monitoring data after data processing, and supplementing the historical monitoring data of the microclimate monitoring system after data processing into the radar three-dimensional wind field to obtain the three-dimensional wind field.
The wind speed correction module comprises: a calculating unit and a judging unit;
the judging unit is used for judging whether the power transmission line microclimate monitoring system exists in the radar three-dimensional wind field grid where the measured point is located;
and the calculating unit is used for establishing a wind profile equation according to the output result of the judging unit and calculating the wind speed information of the measured point in the micro area of the power transmission line.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a micro-area wind speed estimation method for a power transmission line, which comprises the steps of obtaining weather radar monitoring data and micro-meteorological monitoring system historical monitoring data; the historical monitoring data of the microclimate monitoring system comprises anemometry data, and longitude and latitude and altitude information of a microclimate monitoring system site; constructing a three-dimensional wind field based on the weather radar monitoring data and the micro-meteorological monitoring system historical monitoring data; and correcting the weather radar monitoring data by using the wind measurement data based on the three-dimensional wind field and a preset wind profile equation to obtain wind speed information of any elevation of the measured point in the micro area of the power transmission line.
According to the technical scheme provided by the invention, the wind speed of the micro-area of the power transmission line is estimated by applying the wind measuring data of the microclimate monitoring system of the power transmission line and the Doppler radar three-dimensional wind field inversion product, so that the information that the wind speed of any horizontal position of the height of the power transmission line changes along with the height is obtained, and the defects of monitoring by the Doppler weather radar are effectively overcome.
Drawings
FIG. 1 is a flow chart of a method for estimating wind speed in micro-areas of a power transmission line according to the present invention;
FIG. 2 is a block diagram of an implementation flow of a method for estimating wind speed in a micro-area of a power transmission line according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of the system for estimating the wind speed in the micro-area of the power transmission line according to the present invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Aiming at the problem that the elevation shown by a Doppler radar wind speed inversion product is not matched with the height of the power grid power transmission line, the method adopts a statistical method based on a power transmission line microclimate monitoring system to correct the downward wind speed elevation and the numerical value of the original Doppler radar wind speed inversion product, provides the near-ground wind speed change information facing the typhoon prevention of the power grid, and provides necessary real-time wind speed monitoring information for the research of the typhoon prevention and emergency measures of the power grid.
Example 1:
the specific implementation process of the method for estimating the wind speed of the micro-area of the power transmission line provided by the embodiment of the invention is shown in fig. 1, and the method comprises the following steps:
s101: acquiring weather radar monitoring data and microclimate monitoring system historical monitoring data; wherein the microclimate monitoring system historical monitoring data comprises anemometry data;
s102: constructing a three-dimensional wind field based on the weather radar monitoring data and the micro-meteorological monitoring system historical monitoring data;
s103: and correcting the weather radar monitoring data by using the wind measurement data based on the three-dimensional wind field and a preset wind profile equation to obtain wind speed information of any elevation of the measured point in the micro area of the power transmission line.
Specifically, step S102, on the basis of the weather radar monitoring data and the microclimate monitoring system historical monitoring data acquired in step S101, performs data processing, and constructs a three-dimensional wind field by using the processed weather radar monitoring data and the microclimate monitoring system historical monitoring data, and the specific steps include:
step S102-1, processing the data according to a preset rule, wherein the specific implementation process is as follows:
step S102-1-1, calibrating the position of the radar station, acquiring longitude, latitude and altitude information of the radar station, and recording as (x) 0 ，y 0 ，h 0 )；
Step S102-1-2, time consistency check of the Doppler weather radar monitoring data file, reading a time scale according to a data header file format, and checking whether the sending time of the radar monitoring data file is consistent with the time of a GIS (geographic information system) according to a power grid GIS;
step S102-1-3, the microclimate monitoring system of the power transmission line is calibrated, longitude, latitude and altitude information of the power transmission line is obtained and recorded as (x ″) n ，y` n ，h n ) Wherein n is the number of the microclimate monitoring systems of the power transmission line;
step S102-1-4, checking the time consistency of the microclimate monitoring data file of the power transmission line, reading a time scale according to a data header file format, and checking whether the time of sending the data file is consistent with the time of a GIS (geographic information system) according to the power grid GIS;
step S102-1-5, analyzing time resolution differences of Doppler weather radar monitoring data and power transmission line microclimate monitoring system wind measuring data, and when the time resolutions of the Doppler weather radar monitoring data and the power transmission line microclimate monitoring system wind measuring data are different, obtaining two synchronous time sequences by adopting a sliding average method of sampling values;
step S102-1-6, extracting wind measuring data of the microclimate monitoring system of the power transmission line according to the synchronous time sequence time resolution, and recording the wind measuring data as an actually measured wind speed value V' (x ″) n ，y` n ，h n T), wherein x ″ n The longitude value and y' of the nth station of the microclimate monitoring system of the power transmission line n Is the latitude value h of the station n Altitude, t is time stamp.
S102-2, constructing a three-dimensional wind field by using the weather radar monitoring data subjected to data processing and the historical monitoring data of the microclimate monitoring system, and specifically comprising the following steps:
s102-2-1, interpolating radar data from a polar coordinate to an equal height surface under a Cartesian coordinate system by adopting a bilinear interpolation method;
step S102-2-2, taking the position of the radar station as an origin to obtain a three-dimensional wind field with the horizontal radius of less than 150km, the horizontal resolution of 1km, the vertical height of less than 10km and the vertical resolution of 1 km; the wind speed value of any grid point of the three-dimensional wind field I is V (x) ij ，y ij ，h z T), where x is the longitude value, y is the latitude value, t is the time mark, h z Is altitude, h 0 Is the lowest layer of the three-dimensional wind field I, h Z Z is more than or equal to 0 and less than or equal to Z in the highest layer of the three-dimensional wind field I;
and S102-2-3, searching and marking the positions of all the sites of the microclimate monitoring system of the power transmission line in the grid of the radar three-dimensional wind field according to the longitude and latitude and altitude information of the position of each site of the microclimate monitoring system of the power transmission line in the wind measuring data of the microclimate monitoring system of the power transmission line in the step S101, and recording the wind measuring data of the microclimate monitoring system in the grid to obtain the three-dimensional wind field.
Specifically, step S103 is to establish a dynamically updated vertical wind profile equation by using a curve fitting method according to the marking condition of the power transmission line microclimate monitoring system, the wind speed value of any grid point in the radar three-dimensional wind field and the actually measured wind speed value of the power transmission line microclimate monitoring system in the three-dimensional wind field constructed in step S102, so as to obtain the variation relation of the actual wind speed with the altitude in the area of the radar three-dimensional wind field. On the basis, by using radar three-dimensional wind field inversion data and the obtained dynamic vertical wind profile equation, wind speed information of which the horizontal resolution of the elevation where the power transmission line is located is not lower than 1km multiplied by 1km is obtained, and the specific steps comprise:
step S103-1, setting a radar three-dimensional wind field h 0 Layer to h 3 The wind speed value of each grid point in the layer is V (x) ij ，y ij ，h z ，t)，z＝0,1,2,3；
Step S103-2, with radar stationAt position (x) 0 ，y 0 ，h 0 ) In the grid with radius of 150km and any horizontal grid distance of 1km multiplied by 1km, if a micro-meteorological monitoring system exists, the position (x' of the n-th transmission line micro-meteorological monitoring system is used in the embodiment n ，y` n ，h n ) For example, h is extracted from any designated position (x ', y') of the elevation where the transmission line in the grid is located, with (x ', y', h) as a reference 0 Layer to h 3 The wind speeds of 4 lattice points closest to (x ', y', h) in each layer are calculated by a bilinear difference method to obtain the wind speeds of (x ', y') with the heights h 0 、h 1 、h 2 、h 3 The wind speeds of the layers of (1);
step S103-3, extracting the position (x') of the microclimate monitoring system n ，y` n ，h n ) Measured wind speed V' (x ″) n ，y` n ，h n ，t)；
Step S103-4, according to the horizontal position (x ', y'), the altitude is h 0 、h 1 、h 2 、h 3 The wind speed of each layer and the position (x') of the microclimate monitoring system n ，y` n ，h n ) Measured wind speed V' (x ″) n ，y` n ，h n T), using least square method to obtain the profile equation V of wind speed with height, where h is greater than or equal to 0 and less than or equal to h 3 (ii) a The wind profile equation is dynamically changed along with the updating of the microclimate monitoring data of the power transmission line and the sample time t of the radar monitoring data;
step S103-5, calculating to obtain wind speed information of an elevation designated position (x ', y') where the power transmission line is located according to a wind profile equation; the wind speed information changes along with the change of a wind profile equation;
and S103-6, in the grid with any horizontal grid distance of 1km multiplied by 1km, if no microclimate monitoring system exists, the wind profile equation of the grid is replaced by the mean value of the wind profile equations of the adjacent grids. And repeating the steps S S103-2 to S S103-5 to obtain the wind speed information of the designated position of the grid.
Example 2:
based on the same inventive concept, the invention also provides a system for estimating the wind speed of the micro-area of the power transmission line, as shown in fig. 3, the system comprises:
the data acquisition module is used for acquiring weather radar monitoring data and microclimate monitoring system historical monitoring data;
the three-dimensional wind field module is used for constructing a three-dimensional wind field based on weather radar monitoring data and microclimate monitoring system historical monitoring data;
and the wind speed correction module is used for correcting the weather radar monitoring data by using the wind measurement data based on the three-dimensional wind field and a preset wind profile equation to obtain wind speed information of any elevation of a measured point in a micro area of the power transmission line.
The three-dimensional wind field module comprises: the system comprises a data processing unit and a three-dimensional wind field construction unit;
the data processing unit is used for carrying out time correction and time consistency check on the weather radar monitoring data and the micro-meteorological monitoring system historical monitoring data, carrying out time distribution rate matching and obtaining the wind measuring data of the micro-meteorological monitoring system;
and the three-dimensional wind field construction unit is used for constructing a radar three-dimensional wind field according to the weather radar monitoring data after data processing, and supplementing the historical monitoring data of the microclimate monitoring system after data processing into the radar three-dimensional wind field to obtain the three-dimensional wind field.
The wind speed correction module comprises: a calculation unit and a judgment unit;
the judging unit is used for judging whether the power transmission line microclimate monitoring system exists in the radar three-dimensional wind field grid where the measured point is located;
and the calculating unit is used for establishing a wind profile equation according to the output result of the judging unit and calculating the wind speed information of the measured point of the micro-area of the power transmission line.
Example 3:
the block diagram of the implementation flow of the method for estimating the wind speed of the micro-area of the power transmission line in the embodiment of the invention is shown in fig. 2, and the implementation details comprise the following steps:
(1) doppler weather radar data access
1) Calibrating the position of the radar station to obtain the positionLatitude, longitude, altitude information and is set as (x) 0 ，y 0 ，h 0 )。
2) And (4) time consistency check of the Doppler weather radar monitoring data file, reading the time scale according to the data header file format, and checking whether the time of sending the radar monitoring data file is consistent with the time of the GIS system according to the power grid GIS system.
(2) Power transmission line microclimate monitoring system wind measurement data access
1) Calibrating the microclimate monitoring system of the power transmission line, acquiring longitude and latitude and altitude information of the microclimate monitoring system, and setting as (x ″) n ，y` n ，h n ) And n is the number of the microclimate monitoring systems of the power transmission line.
2) And checking the time consistency of the microclimate monitoring data file of the power transmission line, reading the time mark according to a data header file format, and checking whether the time of sending the data file is consistent with the time of a GIS (geographic information system) according to the GIS of the power grid.
3) And analyzing the time resolution difference of the Doppler weather radar monitoring data and the wind measuring data of the power transmission line microclimate monitoring system, and obtaining two synchronous time sequences by adopting a sliding average method of sampling values if necessary.
4) Extracting wind measurement data of the microclimate monitoring system of the power transmission line according to time sequence time resolution, and setting an actually measured wind speed value V' (x ″) n ，y` n ，h n T), wherein x ″ n The longitude value and y' of the nth station of the microclimate monitoring system of the power transmission line n Is the latitude value, h of the station n Altitude, t is time identification.
(3) Doppler weather radar wind speed inversion product resolution
1) And (3) interpolating the radar data from the polar coordinates to the equal altitude surface under a Cartesian coordinate system by adopting a bilinear interpolation method.
2) And taking the position of the radar station as an origin to obtain a three-dimensional wind field with the horizontal radius of less than 150km, the horizontal resolution of 1km, the vertical height of less than 10km and the vertical resolution of 1 km.
3) Therefore, a three-dimensional grid wind field with known spatial resolution is obtained, and the three-dimensional grid wind field is obtained by inverting the product according to the wind speedThe wind speed value of any grid point of the three-dimensional wind field I is V (x) ij ，y ij ，h z T), where x is the longitude value, y is the latitude value, t is the time mark, h z Altitude, h 0 Is the lowest layer of the three-dimensional wind field I, h Z Z is more than or equal to 0 and less than or equal to Z in the highest layer of the three-dimensional wind field I.
(4) Correction of elevation wind speed of power transmission line
The step is to mainly apply wind speed information of different elevations and establish a dynamically updated vertical wind profile equation by adopting a curve fitting method so as to obtain the relation of the actual wind speed in the area along with the altitude. Based on the data, the radar three-dimensional wind field inversion data and the obtained dynamic vertical wind profile equation are used to obtain the wind speed information with the horizontal resolution ratio of the height of the power transmission line not lower than 1km multiplied by 1 km.
1) Three-dimensional wind field h provided with radar 0 Layer to h 3 The wind speed value of each grid point in the layer is V (x) ij ，y ij ，h z ，t)，z＝0,1,2,3；
2) The position (x') of the micrometeorological monitoring system of the nth power transmission line n ，y` n ，h n ) As a basis, extracting h 0 Layer to h 3 In each layer of the layers and (x ″) n ，y` n ，h n ) The wind speed of the nearest 4 grid points is calculated by a bilinear difference value method to obtain (x ″) n ，y` n ) Wind speed value V (x') of different heights n ，y` n ，h z ，t)，z＝0,1,2,3；
3) Extracting the location (x' of the micrometeorological monitoring system n ，y` n ，h n ) Measured wind speed V' (x ″) n ，y` n ，h n ，t)；
4) According to horizontal position (x ″) n ，y` n ) Upper and altitude are respectively h n 、h 0 、h 1 、h 2 、h 3 The wind speed value of (2) is obtained by adopting a least square method to obtain a profile equation V (f (V, h)) of the wind speed along with the height, wherein h is more than or equal to 0 and less than or equal to h 3 。
(5) Wind speed information calculation of power transmission line elevation under condition of no microclimate monitoring system
1) With (x) 0 ，y 0 ，h 0 ) In a grid with a radius of 150km and any horizontal grid distance of 1km multiplied by 1km, if a micrometeorological monitoring system exists, the known conditions of wind speed calculation at any specified position (x ', y') of the elevation where the transmission line in the grid is located are set as follows:
a. and (x ', y', h) at altitude h 0 、h 1 、h 2 、h 3 Each layer of (a) and the Doppler weather radar of (x ', y', h) inverting the grid point wind speed value;
b. obtaining the upper height h of (x ', y') from the bilinear difference 0 、h 1 、h 2 、h 3 The wind speeds of the layers of (1);
c. and (5) obtaining a wind profile equation through the microclimate monitoring system in the step (4).
And calculating to obtain the wind speed information of the designated position (x ', y') of the elevation where the power transmission line is located according to the known conditions.
2) In the grid with any horizontal grid distance of 1km multiplied by 1km, if no microclimate monitoring system exists, the wind profile equation of the grid is replaced by the mean value of the wind profile equations of the adjacent grids. And repeating the first part in the step to obtain the wind speed information of the specified position of the grid.
(6) Dynamic updating of wind speed information of elevation of power transmission line
1) According to the realized time synchronization processing step, considering the message delay time of Doppler weather radar base data, and defining the sample time t of the wind measuring data of the microclimate monitoring system and the radar inversion wind speed data;
2) when the anemometry data of the microclimate monitoring system and the radar inversion wind speed data are respectively updated and are synchronously processed, the updating time of the wind speed information of the elevation where the power transmission line is located changes along with the change of t;
3) the wind speed value of the elevation where the power transmission line is located changes along with the change of the wind profile equation.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included in the scope of the claims of the present invention which are filed as the application.
Claims (6)
1. A method for estimating wind speed of a micro-area of a power transmission line is characterized by comprising the following steps:
acquiring weather radar monitoring data and microclimate monitoring system historical monitoring data; the historical monitoring data of the microclimate monitoring system comprises anemometry data;
constructing a three-dimensional wind field based on the weather radar monitoring data and the micro-meteorological monitoring system historical monitoring data;
correcting the weather radar monitoring data by using the wind measurement data based on the three-dimensional wind field and a preset wind profile equation to obtain wind speed information of any elevation of a measured point in a micro area of the power transmission line;
the method for constructing the three-dimensional wind field based on the weather radar monitoring data and the microclimate monitoring system historical monitoring data comprises the following steps:
processing the weather radar monitoring data and the micro-meteorological monitoring system historical monitoring data according to a preset rule;
constructing a radar three-dimensional wind field according to the processed weather radar monitoring data to obtain a wind speed value of any grid point in the radar three-dimensional wind field;
supplementing the processed historical monitoring data of the microclimate monitoring system into a radar three-dimensional wind field to obtain a three-dimensional wind field;
the predetermined rule includes:
the microclimate monitoring system historical monitoring data further comprises: longitude and latitude and altitude information of a microclimate monitoring system station;
acquiring longitude and latitude and altitude information of a radar station and a microclimate monitoring system station;
carrying out time consistency check on weather radar monitoring data and micro-meteorological monitoring system historical monitoring data;
analyzing the time resolution difference between Doppler weather radar monitoring data after time consistency check and the historical monitoring data of the microclimate monitoring system, when the difference exists, obtaining two synchronous time sequences by adopting a sliding average method of sampling values, and acquiring the anemometry data of the microclimate monitoring system according to the time resolution of the synchronous time sequences;
the method comprises the following steps of constructing a radar three-dimensional wind field according to the processed weather radar monitoring data to obtain a wind speed value of any grid point in the radar three-dimensional wind field, and comprises the following steps:
interpolating the processed Doppler weather radar monitoring data from a polar coordinate to an equal height surface under a Cartesian coordinate system by adopting a bilinear interpolation method;
in the interpolated Cartesian coordinate system, taking the position of a radar station as an origin, and establishing a radar three-dimensional wind field according to a set horizontal radius, a set horizontal resolution, a set vertical height and a set vertical resolution;
in the radar three-dimensional wind field, obtaining any lattice point wind speed value corresponding to each lattice point longitude value, latitude value, altitude and time identification in a two-dimensional horizontal lattice distance grid divided according to a set horizontal resolution under different altitudes based on the set vertical resolution;
the process of establishing the preset wind profile equation comprises the following steps:
taking longitude and latitude and altitude information of a measured point as a reference, and acquiring the wind speed of a grid point which is closest to the measured point in each layer of a radar three-dimensional wind field;
calculating to obtain wind speed values of different altitudes in each layer corresponding to the vertical resolution of the radar three-dimensional wind field in the longitude and latitude where the measured point is located by adopting a bilinear difference method according to the wind speed of the grid point closest to the position of the measured point in each layer of the radar three-dimensional wind field;
and obtaining a wind profile equation of the wind speed of the measured point in the longitude and latitude along with the change of the altitude by adopting a least square method according to the wind measuring data of the microclimate monitoring system in the three-dimensional wind field and the wind speed values of different altitudes in each layer corresponding to the vertical resolution of the radar three-dimensional wind field in the longitude and latitude where the measured point is located.
2. The method for estimating the wind speed in the micro-area of the power transmission line according to claim 1, wherein the step of supplementing the processed historical monitoring data of the microclimate monitoring system into a radar three-dimensional wind field to obtain the three-dimensional wind field comprises the following steps:
the microclimate monitoring system historical monitoring data further comprises: longitude and latitude and altitude information of a microclimate monitoring system station;
positioning the microclimate monitoring system station in the grid of the radar three-dimensional wind field according to the longitude and latitude and altitude information of the microclimate monitoring system station;
and marking sites of the microclimate monitoring system in the grid, and recording wind measuring data of the microclimate monitoring system in the grid to obtain a three-dimensional wind field.
3. The method for estimating the wind speed of the micro-area of the power transmission line according to claim 2, wherein the method for establishing the wind profile equation based on the three-dimensional wind field and the preset wind profile equation corrects the weather radar monitoring data by using the anemometry data to obtain the wind speed information of any elevation of the measured points of the micro-area of the power transmission line, and comprises the following steps:
judging whether the power transmission line microclimate monitoring system exists in the grid or not according to the marking condition of the microclimate monitoring system site in the three-dimensional wind field grid where the measured point of the power transmission line micro area is located;
when the power transmission line microclimate monitoring system exists in the grid, establishing a wind profile equation of the wind speed at the measured point along with the height according to a preset wind profile equation establishing method, and calculating the information of the wind speed at the measured point along with the height according to the wind profile equation;
when the microclimate monitoring system of the power transmission line does not exist in the grid, a wind profile equation of the wind speed of the adjacent grid along with the height is established according to a preset wind profile equation establishing method, the mean value of the wind profile equations of the adjacent grid replaces the wind profile equation of the grid, and the information of the change of the wind speed on the measured point along with the height is calculated according to the wind profile equation.
4. A system for estimating wind speed in micro-areas of a power transmission line according to any one of claims 1 to 3, comprising:
the data acquisition module is used for acquiring weather radar monitoring data and microclimate monitoring system historical monitoring data;
the three-dimensional wind field module is used for constructing a three-dimensional wind field based on the weather radar monitoring data and the historical monitoring data of the microclimate monitoring system;
and the wind speed correction module is used for correcting the weather radar monitoring data by using the wind measurement data based on the three-dimensional wind field and a preset wind profile equation to obtain wind speed information of any elevation of a measured point in a micro area of the power transmission line.
5. The system of claim 4, wherein the three-dimensional wind farm module comprises: the system comprises a data processing unit and a three-dimensional wind field construction unit;
the data processing unit is used for carrying out time correction and time consistency check on the weather radar monitoring data and the micro-meteorological monitoring system historical monitoring data, carrying out time distribution rate matching and obtaining the wind measuring data of the micro-meteorological monitoring system;
and the three-dimensional wind field construction unit is used for constructing a radar three-dimensional wind field according to the weather radar monitoring data after data processing, and supplementing the historical monitoring data of the microclimate monitoring system after data processing into the radar three-dimensional wind field to obtain the three-dimensional wind field.
6. The system of claim 4, wherein the wind speed correction module comprises: a calculation unit and a judgment unit;
the judging unit is used for judging whether the power transmission line microclimate monitoring system exists in the radar three-dimensional wind field grid where the measured point is located;
and the calculating unit is used for establishing a wind profile equation according to the output result of the judging unit and calculating the wind speed information of the measured point of the micro-area of the power transmission line.
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| CN111896769B (en) * | 2020-08-18 | 2022-01-25 | 广东电网有限责任公司 | Equivalent wind speed measuring method of overhead transmission line and related device |
| CN112037290B (en) * | 2020-08-28 | 2021-05-11 | 中科三清科技有限公司 | Data processing method, device and equipment |
| CN112380228B (en) * | 2020-11-13 | 2022-05-17 | 天津矿山工程有限公司 | Digital mine dynamic modeling monitoring method and system, intelligent terminal and storage medium |
| CN112505801B (en) * | 2020-12-10 | 2022-08-23 | 国网湖南省电力有限公司 | Wind field correction algorithm and system based on power grid micro-terrain observation data |
| CN114996937A (en) * | 2022-06-01 | 2022-09-02 | 浙江省气象台 | Typhoon refined wind field inversion method based on dynamic statistics and application thereof |
| CN115166865B (en) * | 2022-06-29 | 2023-08-15 | 国网江苏省电力有限公司 | Multi-level monitoring networking method, system and storage medium for electric power weather |
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