新型电动式接地极安装装置的研制

Development of new type of electric ground electrode installation device

定期测量变电站接地网接地阻抗是保证电力系统安全稳定运行的重要技术手段之一,目前常用的方法为电压-电流表三极法,测量过程中需要使用锤头人工锤击安装电流极和电压极辅助进行测量,存在安装时间长、拆除困难、安全风险高、单根电流极接地电阻大等弊端。针对上述问题,研制了一款基于压力感应的新型电动式接地极安装装置,配套设置中空注液腔的接地极,实现人工安装方式的电力替代,单人即可操作,遇到障碍时可自感应破除障碍,安装完毕后可实现降阻剂打压降阻,提高了变电站接地网接地阻抗测试的工作效率和安全性。

Regularly measuring the grounding impedance of the substation grounding grid is one of the important technical means to ensure the safe and stable operation of the power system.The current used method is the voltage-ammeter three-pole method.During the measurement process,a hammer must be used to manually install the current electrode and voltage pole to make assistant measurement,so the disadvantages such as long time of the installation,difficult removal,high safety risk,and high resistance of the single current electrode will appear.In response to the above problems,a new type of electric ground electrode installation device was developed based on pressure induction.The ground electrode of the hollow liquid injection cavity was matched to realize the electric power instead of manual installation.It can be operated by one person and can be self induction to the obstacles and remove the barrier.The resistance reducing agent can achieve pressure and resistance reduction after the installation,which improves the work efficiency and safety of the grounding impedance test of the substation grounding grid.