大型变电站直流巡检系统方案设计中应注意的问题

The problems need to be paid attention in designing the DC patrol system in the large substation

分析了大型变电站直流绝缘巡检系统中存在的整体绝缘降低、绝缘均等下降的动作死区、“泄漏电流法”的固有缺陷等等问题，结合实际运行经验，提出了根本的解决办法。

The article analyzes the decline of the whole insulation, the uniform decline of the insulation in the dead zone of operation and the inherent defect of the method of the leakage current and such problems in the DC patrol system in the large substation and final- ly presents the basic solution combining the practical operation experience.