六分裂单回试验输电线路的次档距振荡观测分析

Observation Analysis on Subspan Oscillation of Six-split Single Circuit Experimental Power Transmission Line

分析了影响次档距振荡发生的几个主要因素,并以国网公司舞动防治技术重点实验室的河南尖山试验线路为例开展了六分裂单回试验输电线路自然次档距振荡的观测与分析。试验使用拥有多种功能的线路振动监测系统,定性和定量地分析了分裂导线次档距振荡的规律。研究结果表明,在本文试验条件下,迎风侧边相导线容易形成稳定的次档距振荡,由于迎风侧边相导线对气流的干扰,中相导线几乎不发生次档距振荡。另外,各相子导线以及不同档距处的振荡状态皆有所不同,振荡的幅值和频率受到风速的影响也有所变化。

This paper analyzes several main factors influencing subspan oscillation and develops observation anti analysis on natural subspan oscillation of six-split single circuit experimental power transmission line by taking Henan Jianshan experimental line of state grid key laboratory of anti-galloping technology as an example. Line vibration monitoring system with various functions is used for qualitative and quantitative analysis on rules of subspan oscillation of split conductors. Research results indicate that under experimental conditions, side phase conductor at windward side is liable to cause stable subspan os- cillation and due to interference on air flow by side phase conductor, subspan oscillation may hardly happen to the middle phase conductor. In addition, oscillation states of various sub-conductors and subspans are different, and amplitudes and fre- quencies of oscillation may be changed by influence of wind speed.