基于密封气压检测的引下线腐蚀状态监测研究

Study on Corrosion Condition Monitoring of Lead-In Line Based on Embedded Corrosion Unit

目前国内杆塔或其他电力设施的接地引下线均未做防腐措施处理,对电力系统的安全运行造成极大隐患。提出了可用于变电站及输电线路接地引下线的腐蚀状态监测方法,并设计了基于密封气压检测的引下线腐蚀状态监测装置,将中空充气密封状态的腐蚀单元与接地引下线一同埋入土壤中,且与接地引下线保持电气连接,保证监测装置与接地引下线在同样的土壤环境中发生腐蚀,且具有同样大小的通流。通过制作实验室模型及可行性试验,验证了该装置可实现免开挖接地引下线腐蚀状态的监测功能。

At present,the grounding down conductors of poles or other power facilities in China have not been treated with anti-corrosion measures;it causes great hidden dangers to the safe operation of the power system.In this paper,a corrosion state monitoring method that can be used for grounding down conductors of substations and transmission lines is proposed,and a corrosion state monitoring device for down conductors based on sealing air pressure detection is devised,that is bury the corrosive unit in a hollow,air-filled and sealed state together with the ground down conductor into the soil,and maintain electrical connection with the ground down conductor,and moreover it should ensure that the monitoring device and the ground down conductor are corroded in the same soil environment,have the same flow through.A laboratory model is made to carry out feasibility test,which verifies that the device can realize the monitoring function of the corrosion status of grounding lead down without excavation.