提出了接地网腐蚀状态检测的电化学方法,开发了适合现场应用的便携式快速检测系统.系统由限流探头、恒电位仪、数据采集卡、笔记本电脑以及相应数据处理软件构成.限流探头解决了电流分布的问题,数据的滤波和拟合处理可以消除噪声干扰以及土壤电阻的影响.使用时将探头插入待测地网上方土壤,施加恒电流极化,通过解析充电曲线得到表征接地网腐蚀状态的极化阻力值Rp.利用该系统在一些发电厂和变电站进行了检测,取得了良好的结果.
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