Research On Application Of Damping Wire In Aeolian Vibration Protection Of Transmission Line In Ulagai

Overhead transmission lines are the main carriers of electrical energy,and its safe operation has very important significance for the stability of the power system.In recent years,the weather conditions have continuously deteriorated,and the risks faced by transmission lines have increased.As one of the more serious disasters,the breeze vibration of the wire is one of the more serious disasters.The problems such as damage to the fixtures,broken strands on the grounding conductors,and outages of the lines have created problems such as huge economic loss for the power grid and society.In order to improve the anti-vibration capability of the transmission line,the impact caused by less breezy vibration is usually suppressed by installing an anti-vibration damper.However,due to the cold and windy weather in Ulagai,the breeze vibration of the conductors in this area is extremely serious.The effect of anti-vibration dampers is not ideal,and there are often accidents such as damage to the anti-vibration hammer and loss of strands in the wire.In order to improve the anti-vibration level of its transmission lines,the power grid of the area has undergone a large-scale reconstruction project,replacing the existing anti-vibration dampers in the line with damping lines to improve the level of line operation.This article is based on this background,through the study of the law of the joint distribution of wind speed and direction in the region,combined with energy balance method theory,to evaluate the effect of the project,the specific research content is as follows:1)The distribution of wind speed and direction in Ulagai region was calculated to study the causes of frequent breeze vibration on the Ulagai transmission line.At the same time,combined with the statistical analysis results and the extreme I-type distribution,the parameters in the joint distribution function of wind speed and direction were performed using the least square method to fit and obtain the joint distribution of wind speed and direction in the Ulagai region.2)Based on the energy balance method,the natural frequency of the transmission line is calculated based on the line representative span and the average running tension,and the wind input power P_w and the self-damping power P_c at the corresponding frequency are obtained,and the damping line installation method is combined.The expression of the power consumption P_d of the damping line with respect to the central amplitude A₀ is obtained.Using the energy balance method as a criterion,the central amplitude A₀ of the span that satisfies the balance equation is calculated by solving the balance equation.According to the calculated centerline amplitude A₀ of the transmission line span,the corresponding dynamic bending strain value?is calculated.3)Based on the above theory,consider the impact of the installation method on the damping effect of the damping cable,use the dynamic bending strain of the transmission line as the evaluation standard and perform the anti-vibration effect of various damping line installation methods under different representative gears and design a reasonable damping line installation.4)Based on the above design plan,we will guide the reconstruction project of the damping line in the Ulagai region.According to the representative span of each transmission line,we shall select the corresponding installation method of the damping line and calculate the dynamic bending strain of the transformed conductor and applied in the reconstruction project for anti-vibration of transmission line.