摘要
随着我国生态迅速恢复,电力系统发展与鸟类生态完善的冲突日益上升。为了研究热带地区输电线路的鸟粪闪络,在了解热带地区主要对线路造成危害的鸟类种群的基础上,模拟热带地区的典型环境条件,采用模拟鸟粪进行了110 k V输电线路鸟粪闪络的试验研究。试验结果表明:鸟粪电导率随着含水率升高呈饱和增加趋势;含水率比较低的时候,鸟粪闪络的概率远高于积污闪络的概率,含水率较高的时候,鸟粪闪络概率与积污闪络基本相同;鸟粪引起的击穿概率与鸟粪的流量成饱和正相关关系,击穿概率与鸟粪通道和绝缘子的距离成负相关关系;110 k V输电线路I型绝缘子串15 cm的空间范围内是大型鸟类排便闪络击穿的高危险区域,可以通过增加均压环或增加绝缘子大伞的间隙来降低鸟粪闪络概率。所获结果可供热带地区110 k V线路的设计和鸟害防治工作参考。
Along with improvement in the environment in China, the conflict is rising between power system expansion and bird ecology. To understand the flashovers initiated by bird excretion on transmission lines in tropical areas, on the basis of summarizing the main bird species threats to transmission lines, we simulated typical conditions of tropical area and applied simulated bird excretion to conduct an experimental analysis of the flashovers. The results show that conduc- tivity of bird excretion increases with the moisture content in the excretion by an saturated trend. Meanwhile, flashovers initiated by bird excretion with low moisture content are more likely to happen than pollution flashovers, but bird excre- tion with high moisture content brings no difference between the probabilities of the two kinds of flashovers. Moreover, the breakdown probability near insulator initiated by bird excretion has a saturated positive correlation with the amount of bird excretion, yet there is a negative relationship with the distance between bird excretion channel and insulator. It is concluded that areas with less than 15 cm from I-type insulators on 110 kV transmission lines are high risk areas, which means high probability of breakdown initiated by large bird excretion. The results can be used as reference for the design and bird damage control of 110 kV transmission lines in tropical areas.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2016年第1期248-255,共8页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2009CB724507)~~
关键词
热带地区
输电线路
鸟粪闪络
模拟试验
绝缘子串
击穿
tropical areas
transmission lines
flashovers initiated by bird excretion
simulation experiment
insulatorrings
breakdown
