架空地线降耗措施及其对线路参数影响

Consumption Reduction on Overhead Ground Wire and Its Influence on Line Parameters

文章介绍了架空输电线路上地线损耗产生的机理,及各种降低地线损耗的方法。分析了地线的接地方式对架空输电线路的电气参数的影响,通过PSCAD/EMTDC仿真,说明了使用经典理论计算线路的零序参数时应注意区分地线不同的接地方式,以得到较为准确的线路参数,最后提出了对输电线路的继电保护产生的影响。

The article introduces the mechanism to cause power loss of overhead ground wire and methods to lower such loss.It studies how grounding method of the ground wire affects electric parameters of the overhead transmission line.It addresses,through PSCAD/EMTDC simulation,the importance to distinguish different grounding methods of ground wire when calculating zero-sequence parameter of the line by classical theory for the purpose to get accurate parameters.Moreover,it discusses the influence on relay protection of the transmission line.