CN112577455B - Overhead line sag monitoring device based on Beidou high-precision positioning system - Google Patents
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2113/00—Details relating to the application field
- G06F2113/16—Cables, cable trees or wire harnesses
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Abstract
The invention relates to stringing sag monitoring equipment based on a Beidou high-precision positioning system, which belongs to the technical field of stringing sag monitoring and comprises a measuring trolley and a ground server; the ground server comprises a data receiving and transmitting unit, an intelligent sag detection system, a display, an operation control unit, a data storage unit, a data processing unit, a data prediction unit, a sag judgment unit and a stringing database. The stringing sag monitoring equipment carries out maximum sag prediction on the to-be-strutted conducting wire, pays particular attention to the to-be-strutted conducting wire with danger possibility, enables the whole stringing process to be economical and reasonable in design and safe and reliable in operation, and enables stringing work to be higher in efficiency and safety factor.
Description
Technical Field
The invention relates to the technical field of stringing sag monitoring, in particular to stringing sag monitoring equipment based on a Beidou high-precision positioning system.
Background
The development of energy resources and productivity in China is in a reverse distribution, areas rich in energy are far away from economically developed areas, areas east are economically developed, energy consumption is large, and energy resources are very deficient. The distance between the western energy base and the eastern load center is about 500-2000 km, so long-distance and large-capacity power transmission is a necessary trend for future power grid development in China, and ultra-high voltage power transmission is a power transmission mode with the capacity. In the long-distance voltage transmission process, huge manpower and material resources are needed for line maintenance along the line, and the intelligent, real-time and automatic monitoring of the ultrahigh voltage transmission wire is of very important economic value and practical significance in terms of simplifying maintenance cost, improving maintenance accuracy and detecting real-time requirements.
One of the main problems in the design, construction and operation of overhead transmission lines is sag. An overhead transmission line is constructed according to the principles of economy, reasonability, safety and applicability, the strength of materials is fully utilized, and safe operation is guaranteed. Therefore, when the circuit is designed, the stress and the sag of the wire must be calculated, the change conditions of the stress and the sag of the wire under various meteorological conditions are determined and mastered, the value of the stress and the sag of the wire is guaranteed not to exceed the allowable value of the strength of the wire when the stress of the wire is maximum, and the safe distance to the ground of the wire is guaranteed when the sag is maximum, so that the circuit is guaranteed to be economical and reasonable in design and safe and reliable in operation, and therefore the method has important significance for sag measurement of the ultrahigh-voltage transmission wire.
Disclosure of Invention
The invention aims to provide stringing sag monitoring equipment based on a Beidou high-precision positioning system, which can measure and predict stringing sag and related parameters in real time.
In order to achieve the purpose, the invention adopts the following technical scheme:
an overhead line sag monitoring device based on a Beidou high-precision positioning system comprises a measuring trolley and a ground server; the ground server comprises a data receiving and transmitting unit, an intelligent sag detection system, a display, an operation control unit, a data storage unit, a data processing unit, a data prediction unit, a sag judgment unit and a stringing database.
The hanging points for placing the trolley on the tower can be the hanging points with the same phase or the hanging points with different phases.
The display displays the state of the wire, the position of the trolley and the route traveled by the trolley on each phase in real time; the display can be performed in different windows, and the fitting states of different phases are displayed in different windows; two wires are shown on each phase: one is a design sag wire fitted according to the design sag, and one is an actual sag wire fitted according to the position of the trolley.
The operation control unit controls the trolley to reach the position of the maximum sag value, the actual sag is adjusted to be close to the designed sag through the drawing and setting line, and when the maximum sag value meets the design requirement, a prompt is given.
Data storage may be performed through a local storage or a cloud server.
The data processing unit comprises a model building unit, a data fitting unit and a prediction unit, wherein the model building unit builds a maximum sag calculation model, a temperature influence model on the wire sag and a curve fitting model, and the data fitting unit brings a fitting curve actually measured by the trolley and maximum sag data into a formula to perform least square fitting; and the prediction unit calculates the maximum sag of all the lines to be erected according to the prediction equation and the actual data such as the tower coordinates.
The sag judging unit judges whether the maximum sag of the overhead line exceeds a preset range, and when the maximum sag of the overhead line exceeds the preset range, the wires to be erected are classified into a dangerous overhead line database Dd, and wires in the Dd database need to be arranged with special attention; when the maximum sag of the wire to be erected is within a preset range, the wire to be erected is put into a safety wire erection database Ds, and the wire in the Ds database is normally laid when the wire is laid.
The beneficial effect of this application has: the maximum sag prediction is carried out on the wires to be erected, the wires to be erected with danger possibility are paid special attention, the whole stringing process is economical and reasonable in design and safe and reliable in operation, the stringing work efficiency is higher, and the safety factor is higher.
Drawings
Fig. 1 is a flow chart of an implementation of the stringing sag monitoring device.
Detailed Description
An overhead line sag monitoring device based on a Beidou high-precision positioning system comprises a measuring trolley and a ground server; the ground server comprises a data receiving and transmitting unit, an intelligent sag detection system, a display, an operation control unit, a data storage unit, a data processing unit, a data prediction unit, a sag judgment unit and a stringing database.
The hanging points for placing the trolley on the tower can be the hanging points with the same phase or the hanging points with different phases.
The display displays the state of the wire, the position of the trolley and the route traveled by the trolley on each phase in real time; the display can be performed in different windows, and the fitting states of different phases are displayed in different windows; two wires are shown on each phase: one is a design sag wire fitted according to the design sag, and one is an actual sag wire fitted according to the position of the trolley.
The operation control unit controls the trolley to reach the position of the maximum sag value, the actual sag is adjusted to be close to the designed sag through the drawing and setting line, and when the maximum sag value meets the design requirement, a prompt is given.
Data storage may be performed through a local storage or a cloud server.
The data processing unit comprises a model building unit, a data fitting unit and a prediction unit, wherein the model building unit builds a maximum sag calculation model, a temperature influence model on the wire sag and a curve fitting model, and the data fitting unit brings a fitting curve actually measured by the trolley and maximum sag data into a formula to perform least square fitting; and the prediction unit calculates the maximum sag of all the lines to be erected according to the prediction equation and the actual data such as the tower coordinates.
The sag judging unit judges whether the maximum sag of the overhead line exceeds a preset range, and when the maximum sag of the overhead line exceeds the preset range, the wires to be erected are classified into a dangerous overhead line database Dd, and wires in the Dd database need to be arranged with special attention; when the maximum sag of the wire to be erected is within a preset range, the wire to be erected is put into a safety wire erection database Ds, and the wire in the Ds database is normally laid when the wire is laid.
The stringing sag monitoring device can be specifically realized through the following steps:
1. and obtaining the actually measured fitted curves and the maximum sag of the multiple wires by using the trolley.
1.1 select a plurality of continuous shaft towers of treating overhead line, acquire the wire hanging point, put a dolly respectively at two adjacent tower hanging point positions, carry on big dipper high accuracy positioning system on this dolly, obtain tower hanging point coordinate through the coordinate that acquires the dolly position.
The phase position of the hanging point for placing the trolley on the tower is not limited, and the hanging point can be the same phase position or different phase positions.
1.2 monitoring sag construction:
1.2.1 respectively placing a plurality of trolleys on the leads with different phases, operating the trolleys to move towards the position of the maximum sag after stringing, and transmitting the positioning data of the trolleys back to a server in real time through a TCP/IP protocol of a 4G network; and receiving the position information of the trolley in real time.
1.2.2 displaying the state of the wire, the position of the trolley and the route traveled by the trolley on each phase in real time;
and displaying in different windows, wherein the different windows display the fitting states of different phases. Two wires are shown on each phase: one is a design sag wire fitted according to the design sag, and one is an actual sag wire fitted according to the position of the trolley.
1.2.3 the position of dolly arrival maximum sag value is controlled to the dolly, adjusts the actual sag through drawing the unwrapping wire and is close to the design sag, gives the suggestion when the maximum sag value satisfies the design requirement.
1.3 data storage: the intelligent sag detection system performs unified management on data in the detection process, and after construction is completed, hanging point information, a fitting curve and the maximum sag are exported and filed.
Data storage may be performed through a local storage or a cloud server.
2. Building stringing fitting curve and maximum sag calculation model
The maximum sag calculation formula is:
wherein, delta is the stress at the lowest point of the overhead line sag, r is the specific load of the overhead line, L is the length of the overhead line, L is the span, f t The influence parameters of the temperature on the conductor sag are shown;
wherein:
wherein f is r Is the actual sag of the current state of the wire,/ h Half of span, T c Is the temperature of the wire, q c For convective heat-dissipating power of the wire, q r For the radiation power of the conductor, q s The solar heating power per unit length of wire, R (T) c ) Denotes the AC resistance value at the wire temperature Tc, c is the equivalent specific heat capacity of the wire, I is the temperature T c Dynamic current carrying in time; and:
wherein h is the vertical distance from a certain point on the wire to the origin, and x is the horizontal distance from a certain point on the wire to the reference point; c. C 1 、c 2 And k is a constant for determining the shape of the fitting curve.
And substituting a fitting curve actually measured by the trolley and the maximum sag data into a formula to perform least square fitting.
3. And calculating the maximum sag of all the wires to be erected according to the prediction equation and the actual data such as the tower coordinates.
4. When the maximum sag of the wire to be erected exceeds a preset range, the wire to be erected is put into a dangerous stringing database Dd, and special attention needs to be paid when the wire in the Dd database is laid; when the maximum sag of the wire to be erected is within a preset range, the wire to be erected is put into a safety wire erection database Ds, and the wire in the Ds database can be normally arranged when the wire is arranged.
The invention is described above by way of example with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.
Claims (6)
1. A wiring sag monitoring device based on a Beidou high-precision positioning system comprises a measuring trolley and a ground server; the method is characterized in that: the ground server comprises a data receiving and transmitting unit, an intelligent sag detection system, a display, an operation control unit, a data storage unit, a data processing unit, a data prediction unit, a sag judgment unit and a stringing database;
the stringing sag monitoring device comprises the following steps:
obtaining actual measurement fitting curves and maximum sag of a plurality of wires by using a trolley; constructing an overhead line fitting curve and a maximum sag calculation model; calculating the maximum sag of all the lines to be erected according to the prediction equation and the related data; when the maximum sag of the wire to be erected exceeds a preset range, the wire to be erected is put into a dangerous stringing database Dd, and special attention needs to be paid when the wire in the Dd database is laid; when the maximum sag of the wire to be erected is within a preset range, the wire to be erected is put into a safety wire erecting database Ds, and the wire to be erected is normally laid when the wire in the database Ds is laid;
the maximum sag calculation formula is as follows:
wherein:
delta is the stress at the lowest point of the stringing sag;
r is the specific load of the overhead line;
l is the length of the overhead line;
l is the span;
f t the influence parameters of the temperature on the conductor sag are shown;
wherein:
wherein:
f r the actual sag of the wire in the current state;
l h half of the span;
T c is the wire temperature;
q c the convective heat dissipation power of the lead;
q r radiation heat dissipation power for the wire;
q s the solar heating power of the lead with unit length;
R(T c ) Indicates the temperature of the wire as T c An ac resistance value of time;
c is the equivalent specific heat capacity of the lead;
i is at a temperature T c Dynamic current carrying in time; and:
wherein:
h is the vertical distance from a certain point on the wire to the origin;
x is the horizontal distance from a certain point on the wire to a reference point;
c 1 、c 2 and k is a constant for determining the shape of the fitting curve.
2. The overhead line sag monitoring device based on the Beidou high-precision positioning system according to claim 1, characterized in that: the display displays the state of the wire, the position of the trolley and the route traveled by the trolley on each phase in real time; the display can be performed in different windows, and the fitting states of different phases are displayed in different windows; two wires are shown on each phase: one is a design sag wire fitted according to the design sag, and one is an actual sag wire fitted according to the position of the trolley.
3. The overhead line sag monitoring device based on the Beidou high-precision positioning system according to claim 1, characterized in that: the operation control unit controls the trolley to reach the position of the maximum sag value, the actual sag is adjusted to be close to the designed sag through the drawing and setting line, and when the maximum sag value meets the design requirement, a prompt is given.
4. The overhead line sag monitoring device based on the Beidou high-precision positioning system according to claim 1, is characterized in that: data storage may be performed through a local storage or a cloud server.
5. The overhead line sag monitoring device based on the Beidou high-precision positioning system according to claim 1, characterized in that: the data processing unit comprises a model building unit, a data fitting unit and a prediction unit, wherein the model building unit builds a maximum sag calculation model, a temperature influence model on the wire sag and a curve fitting model, and the data fitting unit brings a fitting curve actually measured by the trolley and maximum sag data into a formula to perform least square fitting; and the prediction unit calculates the maximum sag of all the wires to be erected according to the prediction equation and the actual data such as the tower coordinates.
6. The overhead line sag monitoring device based on the Beidou high-precision positioning system according to claim 1, is characterized in that: the sag judging unit judges whether the maximum sag of the overhead line exceeds a preset range, and when the maximum sag of the overhead line exceeds the preset range, the lead to be erected is classified into a dangerous overhead line database Dd, and the lead in the Dd database needs special attention when being laid; when the maximum sag of the wire to be erected is within a preset range, the wire to be erected is put into a safety wire erection database Ds, and the wire to be erected is normally arranged when the wire in the Ds database is arranged.
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| JPH07117376B2 (en) * | 1988-10-31 | 1995-12-18 | 住友電設株式会社 | Sagging observation device for wire drawing control |
| AU2007214459B2 (en) * | 2006-02-14 | 2012-05-10 | Edsa Micro Corporation | Systems and methods for real-time system monitoring and predictive analysis |
| CN104463353B (en) * | 2014-11-20 | 2017-11-21 | 广东电网有限责任公司河源供电局 | A kind of overhead transmission line superelevation plant safe distance intelligent Forecasting |
| CN205049114U (en) * | 2015-08-27 | 2016-02-24 | 华北电力大学（保定） | Transmission line arc measurement system that hangs down based on short message communication technique of big dipper |
| CN205561786U (en) * | 2016-04-11 | 2016-09-07 | 合肥金永电气有限公司 | Super high voltage transmission wire arc intelligent measuring device that hangs down |
| CN108362207A (en) * | 2018-02-28 | 2018-08-03 | 成都信息工程大学 | A kind of sag of conductor and ground wire measuring device |
| CN109489536A (en) * | 2018-04-19 | 2019-03-19 | 国网浙江省电力有限公司金华供电公司 | A kind of power transmission line sag automatic checkout system and method |
| CN210723977U (en) * | 2019-07-22 | 2020-06-09 | 江苏省送变电有限公司 | Automatic sag detection and wire tightening system for overhead transmission line |
| CN110429514A (en) * | 2019-07-22 | 2019-11-08 | 江苏省送变电有限公司 | Automatic sag detection and wire tightening system for overhead transmission line |
| CN110501612A (en) * | 2019-08-26 | 2019-11-26 | 北京天御科技有限公司 | A kind of distributed power transmission state monitoring system and method |
| CN111121645B (en) * | 2019-12-31 | 2021-03-19 | 内蒙古蒙能建设工程监理有限责任公司 | High-precision overhead transmission conductor sag detection method |
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