激励条件下高压输电线路除冰技术应用研究  

Research on Application of De-icing Technology on High Voltage Transmission Line Under the Condition of Incentive

作　　者：何青[1] 吕锡锋[1] 赵晓彤[2] 

机构地区：[1]电站设备状态监测与控制教育部重点实验室(华北电力大学),北京市昌平区102206 [2]中国电力科学研究院,北京市海淀区100192

出　　处：《中国电机工程学报》2014年第18期2997-3003,共7页Proceedings of the CSEE

基　　金：中央高校基本科研业务费专项资金资助项目(11QX49)~~

摘　　要：高压输电线路的除冰要求高效、稳定的实施。为了提高线路的除冰效率,提出了一种局部高频激励除冰方法,即由偏心振子激励一段两端约束的覆冰导线,产生交变应力和位移,使覆冰破碎并脱离导线,从而实现线路的除冰。从理论上揭示激励条件下覆冰导线的脱冰机制,以LGJ—70/10雨凇覆冰导线为数学模型,分析研究其在激励载荷作用下的动力响应,考察导线覆冰区域的应力分布和位移。仿真计算结果表明:导线覆冰区域的应力随着激励频率和位移的增加而增大,通过与多个低温环境下一系列不同截面覆冰导线样本的压缩强度实验结果对比发现,在计算参数范围内,导线覆冰区域产生的应力可以很好地达到其破碎强度,证明了其理论可行性。研究表明,在工程实施过程中,应尽可能提高激励频率,降低激励位移,以避免线路大跨度脱冰引起的跳跃,保证除冰作业的稳定性。High voltage transmission lines deicing requires the efficient and stable implementation. In order to improve the deicing efficiency of transmission line, this paper proposed a local high-frequency excitation deicing method： A length of iced wire constrained on both ends was stimulated by an eccentric vibrator; Alternating stress and displacement are generated, which makes the ice break and get out of conductor, so as to realize the de-icing of transmission line. Through taking the LGJ-70/10 glaze icing conductor as the mathematical model, the paper theoretically revealed the ice removal mechanism, analysed its dynamic response under the effect of excitation and investigated the stress distribution and displacement of conductor icing area. The simulation results show that, the stress of the conductor icing area increased with the increase of excitation frequency and displacement, through the comparison of the compression strength experimental results of a series of sectional iced wire at different temperatures, the paper found the stress generated in the conductor icing area was .greater than the crushing strength of the ice in the scope of the calculation parameters, which proved the validity and feasibility of the method. The researches show that, in the process of project implementation, in order to avoid the line jumping which caused by large span ice-shedding, it should increase the incentive frequency and reduce the incentive displacement as far as possible to ensure the stability of deicing operations.

关 键 词：高压输电线路 除冰 激励 动力响应 压缩强度 

分 类 号：TM85[电气工程—高电压与绝缘技术]