摘要
分析输电线路导线分裂子导线粘连机理,研究线路档距、导线电流、子导线分裂间距等因素对导线粘连的影响规律,提出解决子导线粘连的具体方案。基于子导线受力模型和导线悬链线状态方程,采用数值仿真的手段精确描述子导线的动态运动轨迹,并根据2根子导线的最终平衡状态来判断是否发生粘连。研究发现,在档距和分裂间距已定时,导线电流不能超过其对应的粘连临界值;在线路运行时,可以通过在导线最低点增加间隔棒等手段以提高粘连临界电流。结合220 kV欧-铝线粘连问题,经验证本文采用的机理模型和仿真算法是有效的,基于本文的仿真结果可提出解决子导线粘连的方案。
The adhesion mechanism of bundle sub-conductor of transmission line was analyzed,the influence of line span,conductor current and split space to the rule of adhesion were studied,and schemes to solve the adhesion problem were proposed.Based on sub-conductor force model and conductor catenary state equation,the dynamic trajectories of sub-conductors were described exactly by numerical simulation,and the final equilibrium states of two sub-conductors were used to judge whether the adhesion has happened or not.It is found in the study that sub-conductor current cannot over its corresponding adhesion critical value when the line span and split space were specified,and methods such as installing spacers at the lowest point of transmission line can be used to enhance the adhesion critical current when transmission line is in operation.The proposed mechanism model and simulation algorithm,which were testified by the real adhesion problem of 220 kV Ou-Lu transmission line,are valid and schemes to solve the adhesion problem can be proposed based on its simulation results.
出处
《广西电力》
2011年第3期13-16,共4页
Guangxi Electric Power
关键词
输电线路
粘连
电磁力
临界电流
transmission line
conductor adhesion
electromagnetic force
critical current
