CN104655030B - A kind of powerline ice-covering detection and prior-warning device - Google Patents
A kind of powerline ice-covering detection and prior-warning device Download PDFInfo
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Abstract
The invention discloses a kind of detection of powerline ice-covering and prior-warning device, rim detection is filtered to the image information that the camera by network transmission is gathered, and the coordinate of boundary profile point in the picture is recorded by binary conversion treatment and frontier tracing, finally by the border point coordinates before and after Integrated comparative transmission pressure, and carry out with transmission pressure diameter the ice covering thickness that demarcation draws transmission pressure at that time；Data analysis is carried out according to the microclimate parameter of data collecting module collected, it is aided with wire tension changing trend diagram and ice covering thickness changing trend diagram in setting time section, with reference to the history ice covering thickness according to storage, icing situation is predicted to following three to the five days ice covering thickness according to easy meteorologic parameter condition, circuit Design ice thickness and the ice covering thickness of actual measurement for forming icing, and sends pre-warning signal.The present invention on-line checking is realized to powerline ice-covering, while can dynamic early-warning, in time to icing information carry out analysis and early warning.
Description
Technical field
Filled the present invention relates to one kind detection and prior-warning device, more particularly to a kind of detection of powerline ice-covering with early warning
Put.
Background technology
Sleety weather is particularly easy to freeze transmission line of electricity in the winter time, once temperature is relatively low, ice covering thickness is higher, easily breaks
Or damage transmission line of electricity is drawn, so as to cause larger loss.
A kind of powerline ice-covering on-line measuring device is disclosed in Chinese utility model patent CN201420490936, it
By including sensor unit, master controller, communication unit and power supply unit, power supply unit connects sensor unit, master control respectively
Device and communication unit processed, master controller connect sensor unit and communication unit respectively；Sensor unit include pulling force sensor,
Two-dimension tilt angle sensor, three-dimensional ultrasonic wind speed wind direction sensor and Temperature Humidity Sensor, pulling force sensor are located at transmission line of electricity
Between steel tower and insulator chain, two-dimension tilt angle sensor is fixed on pulling force sensor, the sensing inspection of three-dimensional ultrasonic wind speed and direction
Device and Temperature Humidity Sensor are separately fixed at the cross-arm of transmission line of electricity.This device is examined online to the icing of transmission line of electricity
Survey.But in the prior art, the ice covering thickness recognition methods to circuit calculates more time-consuming, and the system of design can not with device
Enough predictions and early warning provided to ice covering thickness future developing trend work.
The content of the invention
Filled it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of detection of powerline ice-covering and early warning
Put, the existing thickness of icing of transmission line of electricity can not only be measured, and the future trend of ice covering thickness can be predicted.
The present invention is achieved by the following technical solutions, and the present invention includes camera, for gathering transmission pressure image
Information；
Data acquisition module, the microclimate parameter for gathering transmission pressure；
Detect with early warning analysis module, including icing detection module and ice-coating pre-warning module, the icing detection module and be：
Be filtered rim detection to the image information gathered by the camera of network transmission, and by binary conversion treatment and border with
Track records the coordinate of boundary profile point in the picture, finally by the border point coordinates before and after Integrated comparative transmission pressure, and
The ice covering thickness that demarcation draws transmission pressure at that time is carried out with transmission pressure diameter；
The ice-coating pre-warning module is：Data analysis is carried out according to the microclimate parameter of data collecting module collected, is aided with
Wire tension changing trend diagram and ice covering thickness changing trend diagram in setting time section are thick with reference to the history icing according to storage
Degree, according to easy meteorologic parameter condition, circuit Design ice thickness and the ice covering thickness of actual measurement for forming icing to icing situation to future
The ice covering thickness of three to five days is predicted, and sends pre-warning signal；
Control centre, receives analysis and pre-warning signal of the detection with early warning analysis module.
It is thick that the microclimate parameter includes the pulling force of insulator chain, angle, meteorological condition, wire icing on transmission pressure
Degree.
The data acquisition module sends data to detection and early warning analysis module by GPRS.
The detection process of the icing detection module comprises the following steps：
(11) the transmission pressure image information to collection carries out edge extracting；
(12) thickness for drawing icing is analyzed by Thickness sensitivity, ice covering thickness, setting are detected using Adaptive Thresholding
Modulus value image is converted into bianry image by threshold value, then finds start boundary point using row scanning and column scan, and basic herein
On be tracked and draw whole boundary profile and then draw ice covering thickness；
(13) classification report, icing ratio are carried out according to the size of icing ratioWherein β1
For first wire icing standard thickness of monitoring, βnFor n-th wire icing standard thickness of monitoring, βdDesign and cover for circuit
Ice thickness, icing ratio is made three-level and reported when being 0.4~0.5 be more dangerous, and icing ratio is made when being 0.5~0.6
It is danger to report for two grades, and icing ratio makes one-level and reports as abnormally dangerous when being more than 0.6.
In the step (11), edge is extracted using multiresolution wavelet changing method.
In the step (12), thickness is divided into four classes, respectively 10mm, 15mm, 20mm, 30mm, first taken threshold value
For peak, threshold value is then gradually reduced, grand master pattern value image corresponding bianry image is converted at each threshold value, simultaneously
The boundary profile of the initial part of wire and insulator is detected, the size of initial part is determined by image size and resolution ratio, directly
The initial part boundary profile for setting feature is met to finding, selected initial part boundary profile is one section of level of approximation straight line
Section.
The prealarming process of the ice-coating pre-warning module comprises the following steps：
(21) the real-time of weather monitoring department and actual area and the meteorological data predicted are collected, and it is temperature threshold, wet
Spend threshold value；
(22) the monitoring instantaneous wind speed and mean wind speed in ten minutes, when wind speed is less than 3m/s, wire icing speed with
Wind speed is directly proportional；When wire icing is most fast, wind speed is 3~6m/s；When wind speed is more than 6m/s, wire icing speed and wind speed are into anti-
Than；
(23) ice covering thickness of linear regression is carried out according to passing history microclimate data；
(24) following three to the five days thickness trends are reported.
In the step (23), regression analysis is divided into two processes of study and prediction：
Training dataset is given first, includes history microclimate data,
T={ (x1,y1),(x2,y2),...,(xn,yn)}
Wherein xi∈Rn, i ∈ 1 ..., n are microclimate data, and y ∈ R are corresponding ice covering thickness value, and learning system is based on
Training data builds model, i.e. function Y=f (X)；
To the current microclimate data x newly inputtedn+1, forecasting system determines corresponding according to the model Y=f (X) learnt
Export yn+1, now output result is the ice covering thickness of prediction.
The present invention has advantages below compared with prior art：The present invention realizes on-line checking to powerline ice-covering, simultaneously
Can dynamic early-warning, in time to icing information carry out analysis and early warning, allow administrative staff understand in time circuit scene actual conditions,
Ensure that startup ice-melt measure is evidence-based, while the commanding and decision-making for the anti-ice disaster relief provides technical support.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is detection and the workflow diagram of early warning analysis module.
Embodiment
Embodiments of the invention are elaborated below, the present embodiment is carried out lower premised on technical solution of the present invention
Implement, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementations
Example.
As shown in figure 1, the present embodiment includes camera, for gathering transmission pressure image information；Data acquisition module, is used
In the microclimate parameter of collection transmission pressure；Detection and early warning analysis module, including icing detection module and ice-coating pre-warning module,
The icing detection module is：Rim detection is filtered to the image information that the camera by network transmission is gathered, and led to
Cross binary conversion treatment and frontier tracing records the coordinate of boundary profile point in the picture, finally by Integrated comparative transmission pressure
Front and rear border point coordinates, and carry out with transmission pressure diameter the ice covering thickness that demarcation draws transmission pressure at that time；
The ice-coating pre-warning module is：Data analysis is carried out according to the microclimate parameter of data collecting module collected, is aided with
Wire tension changing trend diagram and ice covering thickness changing trend diagram in setting time section are thick with reference to the history icing according to storage
Degree, according to easy meteorologic parameter condition, circuit Design ice thickness and the ice covering thickness of actual measurement for forming icing to icing situation to future
The ice covering thickness of three to five days is predicted, and sends pre-warning signal；Control centre, receives detection and point of early warning analysis module
Analysis and pre-warning signal.
Pulling force, angle, meteorological condition, the wire that the microclimate parameter of the present embodiment includes insulator chain on transmission pressure cover
Ice thickness.The pulling force of the present embodiment is measured by the pulling force sensor being arranged on insulator chain.
The camera of the present embodiment is industry camera more than 5,000,000 pixels.
The data acquisition module of the present embodiment sends data to detection and early warning analysis module by GPRS.
As shown in Fig. 2 the detection process of icing detection module comprises the following steps：
(11) the transmission pressure image information to collection carries out edge extracting；The present embodiment is changed using multiresolution wavelet
Method extracts edge, and wavelet transformation has good local property simultaneously in time domain and frequency domain, side is being carried out to wire image
When edge is extracted, when the scale parameter of Wavelet transformation is smaller, the thin change that gray scale occurs can be detected, and when scale parameter is larger
When, the thick change that image occurs can be detected.The effect in terms of the denoising of transmission pressure image, rim detection and contours extract
It is more excellent.
In the present embodiment, if smoothing equationMeet following two conditions：
Condition one：
Condition two：
The present embodiment defines two directive wavelet functions：
Then wavelet transformation can be expressed as along two components in x and y directions with vector form：
Now,WithGradient of the gradation of image along x and y directions is reflected respectively.
Vector field homoemorphism value is
By at the local model maximum value of vector at the wire ice sheet image border that the present embodiment is obtained.By adjusting yardstick
S, that is, realize the extraction work of wire ice sheet image border.
(12) thickness for drawing icing is analyzed by Thickness sensitivity, ice covering thickness, setting are detected using Adaptive Thresholding
Modulus value image is converted into bianry image by threshold value, then finds start boundary point using row scanning and column scan, and basic herein
On be tracked and draw whole boundary profile and then draw ice covering thickness；Thickness is divided into four classes, respectively 10mm, 15mm,
20mm, 30mm, are taken as peak by threshold value first, then gradually reduce threshold value, turn grand master pattern value image at each threshold value
Turn to corresponding bianry image, while detect the boundary profile of the initial part of wire and insulator, the size of initial part by
Image size and resolution ratio are determined, the initial part boundary profile of setting feature, selected initial part side are met until finding
Boundary's profile is one section of level of approximation straightway, detects the initial part rather than detection initial point of boundary profile.It can drop significantly
The interference of low noise.
(13) classification report, icing ratio are carried out according to the size of icing ratioWherein β1
For first wire icing standard thickness of monitoring, β2For second wire icing standard thickness of monitoring, β3For the 3rd of monitoring the
Root wire icing standard thickness, β4For the 4th wire icing standard thickness, β of monitoringdIce covering thickness, unit are designed for circuit
All it is mm, icing ratio is made three-level and reported when being 0.4~0.5 be more dangerous, and icing ratio is made when being 0.5~0.6
It is danger to report for two grades, and icing ratio makes one-level and reports as abnormally dangerous when being more than 0.6.
The prealarming process of ice-coating pre-warning module comprises the following steps：
(21) the real-time of weather monitoring department and actual area and the meteorological data predicted are collected, including temperature, rainfall are strong
The information such as degree, snowfall, wind speed, snowfall intensity, sudden strain of a muscle thunder frequency, wind-force, wind direction, rainfall, and temperature threshold, humidity threshold
Value, temperature threshold is 0~5 DEG C；Relative humidity is more than 85%；
(22) monitoring instantaneous wind speed and the mean wind speed in ten minutes, judge whether instantaneous wind speed is more than 4m/s, ten minutes
Whether interior mean wind speed is more than 1m/s.After temperature and humidity condition possesses, wind speed plays an important role to wire icing.Wind
Substantial amounts of supercooling water droplet can continuously be transferred to overhead transmission line, with wire collide, after being captured by wire by
Step accelerates icing, and when wind speed is less than 3m/s, wire icing speed is directly proportional to wind speed；When wire icing is most fast, wind speed be 3~
6m/s；When wind speed is more than 6m/s, wire icing speed is inversely proportional with wind speed；
(23) ice covering thickness of linear regression is carried out according to passing history microclimate data；What the present embodiment was used
Regression analysis is used to predict relation of the input variable (history microclimate data) between output variable (thickness prediction), this
Method will select a function curve using history microclimate data makes it be fitted given data and prediction unknown number well
According to.Regression analysis is divided into two processes of study and prediction：
Training dataset is given first, includes history microclimate data,
T={ (x1,y1),(x2,y2),...,(xn,yn)}
Wherein xi∈Rn, i ∈ 1 ..., n are microclimate data, and y ∈ R are corresponding ice covering thickness value,
Learning system is based on training data and builds model, i.e. function Y=f (X)；
To the current microclimate data x newly inputtedn+1, forecasting system determines corresponding according to the model Y=f (X) learnt
Export yn+1, now output result is the ice covering thickness of prediction, and the loss function that the present embodiment is used is quadratic loss function.
(24) following three to the five days thickness trends are reported.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (6)
1. a kind of powerline ice-covering detection and prior-warning device, it is characterised in that including camera, for gathering transmission pressure figure
As information；
Data acquisition module, the microclimate parameter for gathering transmission pressure；
Detect with early warning analysis module, including icing detection module and ice-coating pre-warning module, the icing detection module and be：To logical
The image information for crossing the camera collection of network transmission is filtered rim detection, and is remembered by binary conversion treatment and frontier tracing
The coordinate of lower boundary profile point in the picture is recorded, finally by the border point coordinates before and after Integrated comparative transmission pressure, and with defeated
Conductance linear diameter carries out the ice covering thickness that demarcation draws transmission pressure at that time；
The ice-coating pre-warning module is：Data analysis is carried out according to the microclimate parameter of data collecting module collected, is aided with setting
Wire tension changing trend diagram and ice covering thickness changing trend diagram in period, with reference to the history ice covering thickness according to storage,
According to easy meteorologic parameter condition, circuit Design ice thickness and the ice covering thickness of actual measurement for forming icing to icing situation to future three to
The ice covering thickness of five days is predicted, and sends pre-warning signal；
Control centre, receives analysis and pre-warning signal of the detection with early warning analysis module；
The detection process of the icing detection module comprises the following steps：
(11) the transmission pressure image information to collection carries out edge extracting；
(12) thickness for drawing icing is analyzed by Thickness sensitivity, ice covering thickness, given threshold are detected using Adaptive Thresholding
Modulus value image is converted into bianry image, then start boundary point is found using row scanning and column scan, and enter on this basis
Line trace draws whole boundary profile and then draws ice covering thickness；
In the step (12), thickness is divided into four classes, respectively 10mm, 15mm, 20mm, 30mm, be first taken as threshold value most
High level, then gradually reduces threshold value, and grand master pattern value image is converted into corresponding bianry image at each threshold value, detects simultaneously
The boundary profile of the initial part of wire and insulator, the size of initial part is determined by image size and resolution ratio, until looking for
To the initial part boundary profile for meeting setting feature, selected initial part boundary profile is one section of level of approximation straightway；
(13) classification report, icing ratio are carried out according to the size of icing ratioWherein β1For monitoring
First wire icing standard thickness, βnFor n-th wire icing standard thickness of monitoring, βdIce covering thickness is designed for circuit,
Icing ratio is made three-level and reported when being 0.4~0.5 be more dangerous, and icing ratio makes two grades of reports when being 0.5~0.6
As dangerous, icing ratio makes one-level and reports as abnormally dangerous when being more than 0.6；
2. a kind of powerline ice-covering detection according to claim 1 and prior-warning device, it is characterised in that the microclimate
Parameter includes pulling force, angle, meteorological condition, the wire icing thickness of insulator chain on transmission pressure.
3. a kind of powerline ice-covering detection according to claim 1 and prior-warning device, it is characterised in that the data are adopted
Collection module sends data to detection and early warning analysis module by GPRS.
4. a kind of powerline ice-covering detection according to claim 1 and prior-warning device, it is characterised in that the step
(11) in, edge is extracted using multiresolution wavelet changing method.
5. a kind of powerline ice-covering detection according to claim 1 and prior-warning device, it is characterised in that the icing is pre-
The prealarming process of alert module comprises the following steps：
(21) real-time and prediction the meteorological data of weather monitoring department and actual area, and temperature threshold, humidity threshold are collected
Value；
(22) monitoring instantaneous wind speed and the mean wind speed in ten minutes, when wind speed is less than 3m/s, wire icing speed and wind speed
It is directly proportional；When wire icing is most fast, wind speed is 3~6m/s；When wind speed is more than 6m/s, wire icing speed is inversely proportional with wind speed；
(23) ice covering thickness of linear regression is carried out according to passing history microclimate data；
(24) following three to the five days thickness trends are reported.
6. a kind of powerline ice-covering detection according to claim 5 and prior-warning device, it is characterised in that the step
(23) in, regression analysis is divided into two processes of study and prediction：
Training dataset is given first, includes history microclimate data,
T={ (x1,y1),(x2,y2),...,(xn,yn)}
Wherein xi∈Rn, i ∈ 1 ..., n are microclimate data, and y ∈ R are corresponding ice covering thickness value, and learning system is based on training
Data build model, i.e. function Y=f (X)；
To the current microclimate data x newly inputtedn+1, forecasting system is according to the corresponding output of model Y=f (X) determinations learnt
yn+1, now output result is the ice covering thickness of prediction.
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