±800 kV特高压直流输电线路带电作业方式的有限元建模研究

Study on finite element modeling of live working mode of ±800 kV UHV HVDC transmission line

为了提高±800 kV特高压直流输电线路带电作业效率和安全性,进行作业区域的有限元建模分析,提出一种基于图谱特征分析的±800 kV特高压直流输电线路带电作业方式的有限元建模模型。采用相邻帧补偿方法构建±800 kV特高压直流输电线路带电作业有限元图谱模型,采用三维重建方法进行输电线路带电作业区域的有限元建模,结合图谱分析求得带电作业安全距离,对关键特征点采用自适应特征匹配方法实现直流输电线路带电作业的最优带电作业组合间隙定位,采用帧补偿方法进行有限元建模的误差补偿控制,提高±800 kV特高压直流输电线路带电作业的安全性。仿真结果表明,采用该方法进行±800 kV特高压直流输电线路带电作业方式的有限元建模的特征表达能力较好,安全区域定位和组合间隙定位的准确性较高,提高了带电作业的安全性和全局监控能力。

In order to improve the efficiency and safety of live operation of ±800 kV UHVDC transmission line,the finite element modeling analysis of the working area is carried out.A finite element modeling model of live operation for ±800 kV UHVDC transmission line is presented based on graph characteristic analysis.The adjacent frame compensation method is adopted to construct the finite element map model of the live operation of ±800 kV UHVDC transmission line,and the three-dimensional reconstruction method is adopted to model the live working area of the transmission line.The safe distance of the live operation can be obtained by combining the graph analysis.Adaptive feature matching method is used to locate the optimal combined gap of live operation of HVDC transmission line,and frame compensation method is used to control the error of finite element modeling.To improve the safety of live operation of ±800 kV UHV HVDC transmission line.The simulation results show that the finite element modeling of live operation mode of ±800 kV UHVDC transmission line by using this method has good feature expression ability and improves the security and global monitoring ability of live line operation.