为提高接地装置的抗腐蚀性能,利用超音速火焰喷涂技术分别制备了Ni60、NiCr涂层.通过扫描电镜分析了两种涂层的微观形貌、组织结构,并对两种涂层的孔隙率、抗腐蚀性能、电气性能进行了对比.结果 表明:Ni60涂层的致密度好,其在抗腐蚀性能和电气性能方面优于NiCr涂层的.

同塔六回混压线路是电网实际运行中解决输电走廊紧张、提升铁塔利用效率和提高输电容量的有效手段.线路在运行过程中,当一回线路停电检修,其它线路正常运行时,因为电磁感应效应,会在检修线路上产生极大的感应电压与电流,对现场检修人员与接地设备产生较大的危害.使用ATP-EMTP仿真软件对同塔六回输电线路进行仿真,分析线路长度、导线相序和线路潮流对检修线路感应电压及感应电流的影响.结果 表明,线路相序和线路长度对检修线路感应电压及感应电流影响较大,采用3#排列方式能有效减小检修线路上感应电压与感应电流,可为后期线路设计提供参考依据.

In order to investigate the influence of soil properties on the current density along buried metal pipe, the simulation model of DC grounding electrode and buried metal pipe was established by CDEGS software.The current densities of metal pipes under the condition of different soil properties were analyzed comparatively.The results show that in homogeneous soil, the current density of pipe increased with the increase of soil resistivity.In horizontal twolayer soil, the current density of pipe decreased with the increase of the resistivity of top soil, and the current density of pipe increased with the increase of the resistivity of bottom soil.The change of the resistivity of bottom soil had a significant effect on the current density at both ends of the pipe.The change of top soil thickness had less influence on the current density of the pipe.

输电线路铁塔塔腿锈蚀问题现已严重影响到输电线路安全稳定运行.为此,利用ANSYS有限元分析软件针对已锈蚀铁塔主材建立了桁架混合模型,对已锈蚀塔腿主材在最恶劣运行工况下的受力情况进行了计算,由计算结果提出了一种新型加固方案—分解加固法,并以加固补强后的铁塔为基础重新建立了仿真计算模型,对补强后铁塔的应力强度及整体稳定性进行了分析,验证了该种加固补强方案在力学性能方面的可行性;同时从施工周期、施工难易程度、以及经济性方面与传统的铁塔加固补强方案进行了对比,所提出的的新型补强方案均明显优于传统方案.