摘要
当远距离输电工程横穿长江黄河时,需在该区域架设特高压大跨越架空输电线路。由于档距较长、不平衡张力较大等原因,该线路在发生脱冰跳跃时存在更大的安全隐患,而应用轻质、强度高的碳纤维复合芯导线有望降低其运行风险。该文利用清华大学自主研发的三自由度非线性仿真平台,基于导线的脱冰工况,对1000k V特高压大跨越应用同型号的碳纤维复合芯导线与钢芯铝合金导线两种情形进行仿真计算。结果表明:应用碳纤维导线可以降低特高压大跨越线路的弧垂,将不平衡张力降为原来的50%左右,降低绝缘子受力,虽然相间距离有所减小,但通过安装合适的抑制措施可以使其满足7 m的安全要求。因此,在特高压大跨越线路中应用碳纤维复合芯导线可以提升线路发生脱冰跳跃时的力学安全性。
When the long-distance transmission project crosses the Yangtze River and Yellow River,it is necessary to set up ultra-high voltage(UHV)long-span overhead transmission lines in this region.Due to the long span and large unbalanced tension,there are some safety hazards in the ice-shedding condition of transmission lines,and the application of carbon fiber composite conductor(CFCC)which has the advantages of lightweight and high strength is expected to reduce the operation risk.In this paper,based on the ice-shedding condition of the conductor,by using the 3-DOF nonlinear simulation platform independently developed by Tsinghua University,the simulation calculation of 1000 kV UHV long-span transmission line with the same type of CFCC and steel core aluminum alloy conductor is carried out.The results show that,by using CFCC,the sag of the UHV long-span transmission line can be reduced and the unbalance tension can be reduced to 50% of the original.Moreover,the stress on the insulator can also be reduced.Although the minimum interphase clearance becomes smaller,it can be kept above 7 m to meet the safety requirements by installing suppression measures.Therefore,the application of CFCC in the UHV long-span transmission lines can improve its mechanical safety when ice-shedding occurs.
作者
胡雨婷
王黎明
尹芳辉
HU Yuting;WANG Liming;YIN Fanghui(Guangdong Engineering Technology Research Centre of Power Equipment Reliability in Complicated Coastal Environments,Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China)
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2023年第5期1967-1974,共8页
High Voltage Engineering
基金
国家自然科学基金(52077119)。
关键词
碳纤维复合芯导线
脱冰
大跨越
特高压
不平衡张力
相间距离
carbon fiber composite conductor
ice-shedding
long-span
UHV
unbalanced tension
interphase clearance
