基于漏电流与湿度关系辨识的供电线路绝缘状态评估
Evaluation of Insulation Status of Power Supply Line Based on Identification of Relationship between Leakage Current and Humidity

目前农村电网多采用三级漏电保护模式，分别安装在公用变压器、电表箱和客户端，或跳过电表箱的二级漏电保护模式。由于线路环境复杂和施工不规范，且山区农村电网易受到泥石流，树木折断倾轧等自然灾害影响，输电线路时常发生漏电、短路等故障情况。因此，有必要考虑环境因素对农村电网供电线路绝缘状态的影响。本文基于环境湿度对漏电流的影响，提出了一种供电线路绝缘状态评估方法，并通过算例分析对方法的有效性进行了验证，为漏电保护的发展提供了参考价值。

At present, the rural power grid mostly adopts the three-level leakage protection mode, which is installed in the public transformer, meter box and client respectively, or skipping the two-level leakage protection mode of meter box. As the line environment is complex and the construction is not standard, and the rural power net ease in mountainous areas is affected by natural disasters such as debris flow and trees breaking and rolling, etc., the power transmission lines often suffer from leakage, short circuit and other faults. Therefore, it is necessary to consider the influence of environmental factors on the insulation state of rural power supply lines. Based on the influence of environmental humidity on leakage current, this paper puts forward a method for evaluating the insulation status of power supply lines, and verifies the effectiveness of the method through an example analysis, which provides reference value for the development of leakage protection.