摘要
随着架空输电线路规模的日益扩大,鸟类在野外的繁衍生息范围与输电走廊相互重叠,使得输电线路的安全稳定运行受到威胁。鸟害闪络故障是指鸟类栖息或飞越输电线路杆塔时,由排出的粪便或掉落的物体所引起的闪络故障。为降低鸟粪闪络引起的输电线路故障率,文中设计了Г型铁架模拟线路杆塔,并配置了符合真实鸟粪的模拟液,研究了鸟粪在距110 kV复合绝缘子不同距离下的闪络概率。试验分析表明:鸟粪距绝缘子中心处25 cm时,鸟害闪络概率为50%;随着距离的增大,闪络概率大幅下降。基于大量试验数据分析,提出了对110 kV线路复合绝缘子防鸟罩结构设计的优化建议,即防鸟罩半径应大于25 cm。
With the increasing scale of overhead transmission line, human awareness of the protection to the natural environment is gradually strengthened as well. It is more widespread in wild, and the threat to the safety and stability of transmission lines is even more serious, because of the bird habitant overlaps transmission corridor, because of the bird habitant overlaps transmission corridor. Bird flashover faults have been defined that the transmission lines trip accident caused by bird streamer（bird excrement）or falling objects in case of bird activities nearby transmission line or tower. For the sake of decreasing the rate of flashover fauhs caused by bird streamer, a F type iron tower been used to simulate transmission line tower, used a kind of liquid to simulate bird streamer which conforms to the real bird excrement and studied on flashover probability of the 110 kV composite insulator withstand tests at different distances. According to the test results, flashover probability of bird streamer is 50~.4 when it is 25cm away from the center of the insulator, and flashover probability declined sharply when distance increase. Based on a large number of experimental data analysis, this paper puts forward suggestions for optimization of the structure of bird-preventing helmet, which means the radius should be more than 25 cm.
出处
《高压电器》
CAS
CSCD
北大核心
2017年第10期89-93,99,共6页
High Voltage Apparatus
关键词
鸟害闪络故障
鸟粪
复合绝缘子
闪络概率
防鸟罩
bird flashover faults
bird excrement
composite insulator
flashover probability
bird-preventing helmet
