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Method and system for monitoring icing condition of overhead power transmission line

A technology for overhead transmission lines and state monitoring systems, applied to measuring devices, force/torque/power measuring instruments, instruments, etc., can solve the problems of large access and high labor intensity, and achieve the effect of improving accuracy and reducing labor intensity

Inactive Publication Date: 2012-02-15
AEROSPACE SCI & IND SHENZHEN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the technical problems of high labor intensity and large discrepancies between monitoring results and actual conditions in the prior art transmission line icing monitoring system, and provides a system that can realize automatic monitoring of transmission line icing status and has high monitoring result accuracy Icing Monitoring Method for Overhead Transmission Lines

Method used

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  • Method and system for monitoring icing condition of overhead power transmission line
  • Method and system for monitoring icing condition of overhead power transmission line
  • Method and system for monitoring icing condition of overhead power transmission line

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Receive signal collection instructions and collect insulator and wire load, wind speed and wind direction information;

[0057] Based on the above information, establish a vertical load mathematical model in the vertical span unit, and calculate the ice load in the vertical span; if the formula can be used ,here The comprehensive vertical load can be calculated by the insulator and wire load measured by the gravity sensor; It is the self-weight load of conductors and insulators in the vertical span, which can be detected according to the electric power construction manual; is the wind load in the vertical span, which can be calculated by wind speed sensor, wire diameter and wind direction angle; is the ice load in the vertical span. In the above calculation process, it may also be necessary to consider the influence of the wind shape coefficient, wind pressure unevenness and coefficient of the conductor, and the wind disaster adjustment coefficient of the line co...

Embodiment 2

[0060] Receive signal collection instructions and collect insulator inclination, insulator and wire load, wind speed and wind direction information;

[0061] According to the above information, establish the mathematical model of the equivalent ice thickness of the wire, and calculate the equivalent ice thickness value in the vertical span unit; for example, according to the formula The value of the ice coating thickness of the conductor is obtained, where is the thickness of the wire covered with ice; d is the outer diameter of the wire when there is no ice; is the total mass of the wire per meter covered with ice, which can be calculated from the data in the gravity sensor book; is the total mass of the conductor per meter without ice; is the ice density.

[0062] Finally, compare the calculated equivalent ice thickness with the second warning value. If the equivalent ice thickness is within the range of the second warning value, it means that the line is normal or t...

Embodiment 3

[0064] Receive signal collection instructions and collect insulator inclination, insulator and wire load information;

[0065] Based on the above information, establish a mathematical model of the three-dimensional force state of the tower, and calculate the force of the tower; the realization of this algorithm can calculate the force of the tower according to the force analysis in physics.

[0066] Finally, compare the calculated force on the tower with the third warning value. If the force on the tower is within the range of the third warning value, it means that the line is normal or the icing is not enough to affect the normal operation of the wire; If the value exceeds the third warning value, an alarm will be issued, indicating that the line is faulty or the normal operation of the line is affected by icing. The specific alarm operation can be alarmed by setting the alarm device or the alarm information can be prompted in a specific system, such as an expert system, and ...

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Abstract

The invention provides a method and system for monitoring an icing condition of an overhead power transmission line. The method comprises the following steps of: collecting current information of a power transmission line in real time; establishing a Makkonen model according to the collected current information and carrying out data analysis processing to obtain icing condition data of the power transmission line; and making an alert to the data exceeding a warning value. In the technical scheme, the Makkonen model is established through collecting all state information of the power transmission line and is used for carrying out real-time protection and monitoring on an icing load, an icing thickness, a tower rod stress and a lead stress of the power transmission line; and once a monitoring value exceeds an early-warning value, an alert is given out to show that the power transmission line has an icing fault and the power transmission line needs to be monitored and repaired. By utilizing the technical scheme provided by the invention, the automatic monitoring of the icing condition of the power transmission line is realized; and meanwhile, compared with the traditional manual patrol and monitoring, the method and device provided by the invention have the advantages that the accuracy of the line icing monitoring is effectively improved and the labor intensity is effectively reduced.

Description

technical field [0001] The invention belongs to the field of cable monitoring, and in particular relates to a method and system for monitoring the icing state of overhead power transmission lines. Background technique [0002] my country's meteorological environment is changeable, and ice disasters occur from time to time. The ice rain or ice and snow frozen on the transmission line will gradually form an ice shell with a cross-section approximately oval or egg-shaped on the conductor. The icing of transmission lines can only be formed in a specific natural environment. When the temperature and humidity of the air reach certain conditions, icing can be formed. When the temperature and humidity meet the conditions, the amount of icing depends on the wind speed. When there is no wind or light wind, only extremely thin ice can be formed. When the wind speed reaches a certain speed, the ice on the line will accumulate and thicken. Severe icing will cause damage to transmission ...

Claims

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Application Information

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IPC IPC(8): G01D21/02G01L5/00G01B21/08
Inventor 王家田
Owner AEROSPACE SCI & IND SHENZHEN GROUP
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